Lady’s Gitweb - Gitweb/blob - gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 5.008;
  11 use strict;
  12 use warnings;
  13 # handle ACL in file access tests
  14 use filetest 'access';
  15 use CGI qw(:standard :escapeHTML -nosticky);
  16 use CGI::Util qw(unescape);
  17 use CGI::Carp qw(fatalsToBrowser set_message);
  18 use Encode;
  19 use Fcntl ':mode';
  20 use File::Find qw();
  21 use File::Basename qw(basename);
  22 use Time::HiRes qw(gettimeofday tv_interval);
  23 use Digest::MD5 qw(md5_hex);
  24
  25 binmode STDOUT, ':utf8';
  26
  27 if (!defined($CGI::VERSION) || $CGI::VERSION < 4.08) {
  28         eval 'sub CGI::multi_param { CGI::param(@_) }'
  29 }
  30
  31 our $t0 = [ gettimeofday() ];
  32 our $number_of_git_cmds = 0;
  33
  34 BEGIN {
  35         CGI->compile() if $ENV{'MOD_PERL'};
  36 }
  37
  38 our $version = "++GIT_VERSION++";
  39
  40 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  41 sub evaluate_uri {
  42         our $cgi;
  43
  44         our $my_url = $cgi->url();
  45         our $my_uri = $cgi->url(-absolute => 1);
  46
  47         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  48         # needed and used only for URLs with nonempty PATH_INFO
  49         our $base_url = $my_url;
  50
  51         # When the script is used as DirectoryIndex, the URL does not contain the name
  52         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  53         # have to do it ourselves. We make $path_info global because it's also used
  54         # later on.
  55         #
  56         # Another issue with the script being the DirectoryIndex is that the resulting
  57         # $my_url data is not the full script URL: this is good, because we want
  58         # generated links to keep implying the script name if it wasn't explicitly
  59         # indicated in the URL we're handling, but it means that $my_url cannot be used
  60         # as base URL.
  61         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  62         # to build the base URL ourselves:
  63         our $path_info = decode_utf8($ENV{"PATH_INFO"});
  64         if ($path_info) {
  65                 # $path_info has already been URL-decoded by the web server, but
  66                 # $my_url and $my_uri have not. URL-decode them so we can properly
  67                 # strip $path_info.
  68                 $my_url = unescape($my_url);
  69                 $my_uri = unescape($my_uri);
  70                 if ($my_url =~ s,\Q$path_info\E$,, &&
  71                     $my_uri =~ s,\Q$path_info\E$,, &&
  72                     defined $ENV{'SCRIPT_NAME'}) {
  73                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  74                 }
  75         }
  76
  77         # target of the home link on top of all pages
  78         our $home_link = $my_uri || "/";
  79 }
  80
  81 # core git executable to use
  82 # this can just be "git" if your webserver has a sensible PATH
  83 our $GIT = "++GIT_BINDIR++/git";
  84
  85 # absolute fs-path which will be prepended to the project path
  86 #our $projectroot = "/pub/scm";
  87 our $projectroot = "++GITWEB_PROJECTROOT++";
  88
  89 # fs traversing limit for getting project list
  90 # the number is relative to the projectroot
  91 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  92
  93 # string of the home link on top of all pages
  94 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  95
  96 # extra breadcrumbs preceding the home link
  97 our @extra_breadcrumbs = ();
  98
  99 # name of your site or organization to appear in page titles
 100 # replace this with something more descriptive for clearer bookmarks
 101 our $site_name = "++GITWEB_SITENAME++"
 102                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
 103
 104 # html snippet to include in the <head> section of each page
 105 our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
 106 # filename of html text to include at top of each page
 107 our $site_header = "++GITWEB_SITE_HEADER++";
 108 # html text to include at home page
 109 our $home_text = "++GITWEB_HOMETEXT++";
 110 # filename of html text to include at bottom of each page
 111 our $site_footer = "++GITWEB_SITE_FOOTER++";
 112
 113 # URI of stylesheets
 114 our @stylesheets = ("++GITWEB_CSS++");
 115 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 116 our $stylesheet = undef;
 117
 118 # URI of GIT logo (72x27 size)
 119 our $logo = "++GITWEB_LOGO++";
 120 # URI of GIT favicon, assumed to be image/png type
 121 our $favicon = "++GITWEB_FAVICON++";
 122 # URI of gitweb.js (JavaScript code for gitweb)
 123 our $javascript = "++GITWEB_JS++";
 124
 125 # URI and label (title) of GIT logo link
 126 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 127 #our $logo_label = "git documentation";
 128 our $logo_url = "http://git-scm.com/";
 129 our $logo_label = "git homepage";
 130
 131 # source of projects list
 132 our $projects_list = "++GITWEB_LIST++";
 133
 134 # the width (in characters) of the projects list "Description" column
 135 our $projects_list_description_width = 25;
 136
 137 # group projects by category on the projects list
 138 # (enabled if this variable evaluates to true)
 139 our $projects_list_group_categories = 0;
 140
 141 # default category if none specified
 142 # (leave the empty string for no category)
 143 our $project_list_default_category = "";
 144
 145 # default order of projects list
 146 # valid values are none, project, descr, owner, and age
 147 our $default_projects_order = "project";
 148
 149 # show repository only if this file exists
 150 # (only effective if this variable evaluates to true)
 151 our $export_ok = "++GITWEB_EXPORT_OK++";
 152
 153 # don't generate age column on the projects list page
 154 our $omit_age_column = 0;
 155
 156 # don't generate information about owners of repositories
 157 our $omit_owner=0;
 158
 159 # show repository only if this subroutine returns true
 160 # when given the path to the project, for example:
 161 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 162 our $export_auth_hook = undef;
 163
 164 # only allow viewing of repositories also shown on the overview page
 165 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 166
 167 # list of git base URLs used for URL to where fetch project from,
 168 # i.e. full URL is "$git_base_url/$project"
 169 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 170
 171 # default blob_plain mimetype and default charset for text/plain blob
 172 our $default_blob_plain_mimetype = 'text/plain';
 173 our $default_text_plain_charset  = undef;
 174
 175 # file to use for guessing MIME types before trying /etc/mime.types
 176 # (relative to the current git repository)
 177 our $mimetypes_file = undef;
 178
 179 # assume this charset if line contains non-UTF-8 characters;
 180 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 181 # for which encoding all byte sequences are valid, for example
 182 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 183 # could be even 'utf-8' for the old behavior)
 184 our $fallback_encoding = 'latin1';
 185
 186 # rename detection options for git-diff and git-diff-tree
 187 # - default is '-M', with the cost proportional to
 188 #   (number of removed files) * (number of new files).
 189 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 190 #   (number of changed files + number of removed files) * (number of new files)
 191 # - even more costly is '-C', '--find-copies-harder' with cost
 192 #   (number of files in the original tree) * (number of new files)
 193 # - one might want to include '-B' option, e.g. '-B', '-M'
 194 our @diff_opts = ('-M'); # taken from git_commit
 195
 196 # Disables features that would allow repository owners to inject script into
 197 # the gitweb domain.
 198 our $prevent_xss = 0;
 199
 200 # Path to the highlight executable to use (must be the one from
 201 # http://www.andre-simon.de due to assumptions about parameters and output).
 202 # Useful if highlight is not installed on your webserver's PATH.
 203 # [Default: highlight]
 204 our $highlight_bin = "++HIGHLIGHT_BIN++";
 205
 206 # information about snapshot formats that gitweb is capable of serving
 207 our %known_snapshot_formats = (
 208         # name => {
 209         #       'display' => display name,
 210         #       'type' => mime type,
 211         #       'suffix' => filename suffix,
 212         #       'format' => --format for git-archive,
 213         #       'compressor' => [compressor command and arguments]
 214         #                       (array reference, optional)
 215         #       'disabled' => boolean (optional)}
 216         #
 217         'tgz' => {
 218                 'display' => 'tar.gz',
 219                 'type' => 'application/x-gzip',
 220                 'suffix' => '.tar.gz',
 221                 'format' => 'tar',
 222                 'compressor' => ['gzip', '-n']},
 223
 224         'tbz2' => {
 225                 'display' => 'tar.bz2',
 226                 'type' => 'application/x-bzip2',
 227                 'suffix' => '.tar.bz2',
 228                 'format' => 'tar',
 229                 'compressor' => ['bzip2']},
 230
 231         'txz' => {
 232                 'display' => 'tar.xz',
 233                 'type' => 'application/x-xz',
 234                 'suffix' => '.tar.xz',
 235                 'format' => 'tar',
 236                 'compressor' => ['xz'],
 237                 'disabled' => 1},
 238
 239         'zip' => {
 240                 'display' => 'zip',
 241                 'type' => 'application/x-zip',
 242                 'suffix' => '.zip',
 243                 'format' => 'zip'},
 244 );
 245
 246 # Aliases so we understand old gitweb.snapshot values in repository
 247 # configuration.
 248 our %known_snapshot_format_aliases = (
 249         'gzip'  => 'tgz',
 250         'bzip2' => 'tbz2',
 251         'xz'    => 'txz',
 252
 253         # backward compatibility: legacy gitweb config support
 254         'x-gzip' => undef, 'gz' => undef,
 255         'x-bzip2' => undef, 'bz2' => undef,
 256         'x-zip' => undef, '' => undef,
 257 );
 258
 259 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 260 # are changed, it may be appropriate to change these values too via
 261 # $GITWEB_CONFIG.
 262 our %avatar_size = (
 263         'default' => 16,
 264         'double'  => 32
 265 );
 266
 267 # Used to set the maximum load that we will still respond to gitweb queries.
 268 # If server load exceed this value then return "503 server busy" error.
 269 # If gitweb cannot determined server load, it is taken to be 0.
 270 # Leave it undefined (or set to 'undef') to turn off load checking.
 271 our $maxload = 300;
 272
 273 # configuration for 'highlight' (http://www.andre-simon.de/)
 274 # match by basename
 275 our %highlight_basename = (
 276         #'Program' => 'py',
 277         #'Library' => 'py',
 278         'SConstruct' => 'py', # SCons equivalent of Makefile
 279         'Makefile' => 'make',
 280 );
 281 # match by extension
 282 our %highlight_ext = (
 283         # main extensions, defining name of syntax;
 284         # see files in /usr/share/highlight/langDefs/ directory
 285         (map { $_ => $_ } qw(py rb java css js tex bib xml awk bat ini spec tcl sql)),
 286         # alternate extensions, see /etc/highlight/filetypes.conf
 287         (map { $_ => 'c'   } qw(c h)),
 288         (map { $_ => 'sh'  } qw(sh bash zsh ksh)),
 289         (map { $_ => 'cpp' } qw(cpp cxx c++ cc)),
 290         (map { $_ => 'php' } qw(php php3 php4 php5 phps)),
 291         (map { $_ => 'pl'  } qw(pl perl pm)), # perhaps also 'cgi'
 292         (map { $_ => 'make'} qw(make mak mk)),
 293         (map { $_ => 'xml' } qw(xml xhtml html htm)),
 294 );
 295
 296 # You define site-wide feature defaults here; override them with
 297 # $GITWEB_CONFIG as necessary.
 298 our %feature = (
 299         # feature => {
 300         #       'sub' => feature-sub (subroutine),
 301         #       'override' => allow-override (boolean),
 302         #       'default' => [ default options...] (array reference)}
 303         #
 304         # if feature is overridable (it means that allow-override has true value),
 305         # then feature-sub will be called with default options as parameters;
 306         # return value of feature-sub indicates if to enable specified feature
 307         #
 308         # if there is no 'sub' key (no feature-sub), then feature cannot be
 309         # overridden
 310         #
 311         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 312         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 313         # is enabled
 314
 315         # Enable the 'blame' blob view, showing the last commit that modified
 316         # each line in the file. This can be very CPU-intensive.
 317
 318         # To enable system wide have in $GITWEB_CONFIG
 319         # $feature{'blame'}{'default'} = [1];
 320         # To have project specific config enable override in $GITWEB_CONFIG
 321         # $feature{'blame'}{'override'} = 1;
 322         # and in project config gitweb.blame = 0|1;
 323         'blame' => {
 324                 'sub' => sub { feature_bool('blame', @_) },
 325                 'override' => 0,
 326                 'default' => [0]},
 327
 328         # Enable the 'snapshot' link, providing a compressed archive of any
 329         # tree. This can potentially generate high traffic if you have large
 330         # project.
 331
 332         # Value is a list of formats defined in %known_snapshot_formats that
 333         # you wish to offer.
 334         # To disable system wide have in $GITWEB_CONFIG
 335         # $feature{'snapshot'}{'default'} = [];
 336         # To have project specific config enable override in $GITWEB_CONFIG
 337         # $feature{'snapshot'}{'override'} = 1;
 338         # and in project config, a comma-separated list of formats or "none"
 339         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 340         'snapshot' => {
 341                 'sub' => \&feature_snapshot,
 342                 'override' => 0,
 343                 'default' => ['tgz']},
 344
 345         # Enable text search, which will list the commits which match author,
 346         # committer or commit text to a given string.  Enabled by default.
 347         # Project specific override is not supported.
 348         #
 349         # Note that this controls all search features, which means that if
 350         # it is disabled, then 'grep' and 'pickaxe' search would also be
 351         # disabled.
 352         'search' => {
 353                 'override' => 0,
 354                 'default' => [1]},
 355
 356         # Enable grep search, which will list the files in currently selected
 357         # tree containing the given string. Enabled by default. This can be
 358         # potentially CPU-intensive, of course.
 359         # Note that you need to have 'search' feature enabled too.
 360
 361         # To enable system wide have in $GITWEB_CONFIG
 362         # $feature{'grep'}{'default'} = [1];
 363         # To have project specific config enable override in $GITWEB_CONFIG
 364         # $feature{'grep'}{'override'} = 1;
 365         # and in project config gitweb.grep = 0|1;
 366         'grep' => {
 367                 'sub' => sub { feature_bool('grep', @_) },
 368                 'override' => 0,
 369                 'default' => [1]},
 370
 371         # Enable the pickaxe search, which will list the commits that modified
 372         # a given string in a file. This can be practical and quite faster
 373         # alternative to 'blame', but still potentially CPU-intensive.
 374         # Note that you need to have 'search' feature enabled too.
 375
 376         # To enable system wide have in $GITWEB_CONFIG
 377         # $feature{'pickaxe'}{'default'} = [1];
 378         # To have project specific config enable override in $GITWEB_CONFIG
 379         # $feature{'pickaxe'}{'override'} = 1;
 380         # and in project config gitweb.pickaxe = 0|1;
 381         'pickaxe' => {
 382                 'sub' => sub { feature_bool('pickaxe', @_) },
 383                 'override' => 0,
 384                 'default' => [1]},
 385
 386         # Enable showing size of blobs in a 'tree' view, in a separate
 387         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 388
 389         # To disable system wide have in $GITWEB_CONFIG
 390         # $feature{'show-sizes'}{'default'} = [0];
 391         # To have project specific config enable override in $GITWEB_CONFIG
 392         # $feature{'show-sizes'}{'override'} = 1;
 393         # and in project config gitweb.showsizes = 0|1;
 394         'show-sizes' => {
 395                 'sub' => sub { feature_bool('showsizes', @_) },
 396                 'override' => 0,
 397                 'default' => [1]},
 398
 399         # Make gitweb use an alternative format of the URLs which can be
 400         # more readable and natural-looking: project name is embedded
 401         # directly in the path and the query string contains other
 402         # auxiliary information. All gitweb installations recognize
 403         # URL in either format; this configures in which formats gitweb
 404         # generates links.
 405
 406         # To enable system wide have in $GITWEB_CONFIG
 407         # $feature{'pathinfo'}{'default'} = [1];
 408         # Project specific override is not supported.
 409
 410         # Note that you will need to change the default location of CSS,
 411         # favicon, logo and possibly other files to an absolute URL. Also,
 412         # if gitweb.cgi serves as your indexfile, you will need to force
 413         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 414         'pathinfo' => {
 415                 'override' => 0,
 416                 'default' => [0]},
 417
 418         # Make gitweb consider projects in project root subdirectories
 419         # to be forks of existing projects. Given project $projname.git,
 420         # projects matching $projname/*.git will not be shown in the main
 421         # projects list, instead a '+' mark will be added to $projname
 422         # there and a 'forks' view will be enabled for the project, listing
 423         # all the forks. If project list is taken from a file, forks have
 424         # to be listed after the main project.
 425
 426         # To enable system wide have in $GITWEB_CONFIG
 427         # $feature{'forks'}{'default'} = [1];
 428         # Project specific override is not supported.
 429         'forks' => {
 430                 'override' => 0,
 431                 'default' => [0]},
 432
 433         # Insert custom links to the action bar of all project pages.
 434         # This enables you mainly to link to third-party scripts integrating
 435         # into gitweb; e.g. git-browser for graphical history representation
 436         # or custom web-based repository administration interface.
 437
 438         # The 'default' value consists of a list of triplets in the form
 439         # (label, link, position) where position is the label after which
 440         # to insert the link and link is a format string where %n expands
 441         # to the project name, %f to the project path within the filesystem,
 442         # %h to the current hash (h gitweb parameter) and %b to the current
 443         # hash base (hb gitweb parameter); %% expands to %.
 444
 445         # To enable system wide have in $GITWEB_CONFIG e.g.
 446         # $feature{'actions'}{'default'} = [('graphiclog',
 447         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 448         # Project specific override is not supported.
 449         'actions' => {
 450                 'override' => 0,
 451                 'default' => []},
 452
 453         # Allow gitweb scan project content tags of project repository,
 454         # and display the popular Web 2.0-ish "tag cloud" near the projects
 455         # list.  Note that this is something COMPLETELY different from the
 456         # normal Git tags.
 457
 458         # gitweb by itself can show existing tags, but it does not handle
 459         # tagging itself; you need to do it externally, outside gitweb.
 460         # The format is described in git_get_project_ctags() subroutine.
 461         # You may want to install the HTML::TagCloud Perl module to get
 462         # a pretty tag cloud instead of just a list of tags.
 463
 464         # To enable system wide have in $GITWEB_CONFIG
 465         # $feature{'ctags'}{'default'} = [1];
 466         # Project specific override is not supported.
 467
 468         # In the future whether ctags editing is enabled might depend
 469         # on the value, but using 1 should always mean no editing of ctags.
 470         'ctags' => {
 471                 'override' => 0,
 472                 'default' => [0]},
 473
 474         # The maximum number of patches in a patchset generated in patch
 475         # view. Set this to 0 or undef to disable patch view, or to a
 476         # negative number to remove any limit.
 477
 478         # To disable system wide have in $GITWEB_CONFIG
 479         # $feature{'patches'}{'default'} = [0];
 480         # To have project specific config enable override in $GITWEB_CONFIG
 481         # $feature{'patches'}{'override'} = 1;
 482         # and in project config gitweb.patches = 0|n;
 483         # where n is the maximum number of patches allowed in a patchset.
 484         'patches' => {
 485                 'sub' => \&feature_patches,
 486                 'override' => 0,
 487                 'default' => [16]},
 488
 489         # Avatar support. When this feature is enabled, views such as
 490         # shortlog or commit will display an avatar associated with
 491         # the email of the committer(s) and/or author(s).
 492
 493         # Currently available providers are gravatar and picon.
 494         # If an unknown provider is specified, the feature is disabled.
 495
 496         # Picon currently relies on the indiana.edu database.
 497
 498         # To enable system wide have in $GITWEB_CONFIG
 499         # $feature{'avatar'}{'default'} = ['<provider>'];
 500         # where <provider> is either gravatar or picon.
 501         # To have project specific config enable override in $GITWEB_CONFIG
 502         # $feature{'avatar'}{'override'} = 1;
 503         # and in project config gitweb.avatar = <provider>;
 504         'avatar' => {
 505                 'sub' => \&feature_avatar,
 506                 'override' => 0,
 507                 'default' => ['']},
 508
 509         # Enable displaying how much time and how many git commands
 510         # it took to generate and display page.  Disabled by default.
 511         # Project specific override is not supported.
 512         'timed' => {
 513                 'override' => 0,
 514                 'default' => [0]},
 515
 516         # Enable turning some links into links to actions which require
 517         # JavaScript to run (like 'blame_incremental').  Not enabled by
 518         # default.  Project specific override is currently not supported.
 519         'javascript-actions' => {
 520                 'override' => 0,
 521                 'default' => [0]},
 522
 523         # Enable and configure ability to change common timezone for dates
 524         # in gitweb output via JavaScript.  Enabled by default.
 525         # Project specific override is not supported.
 526         'javascript-timezone' => {
 527                 'override' => 0,
 528                 'default' => [
 529                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 530                                      # or undef to turn off this feature
 531                         'gitweb_tz', # name of cookie where to store selected timezone
 532                         'datetime',  # CSS class used to mark up dates for manipulation
 533                 ]},
 534
 535         # Syntax highlighting support. This is based on Daniel Svensson's
 536         # and Sham Chukoury's work in gitweb-xmms2.git.
 537         # It requires the 'highlight' program present in $PATH,
 538         # and therefore is disabled by default.
 539
 540         # To enable system wide have in $GITWEB_CONFIG
 541         # $feature{'highlight'}{'default'} = [1];
 542
 543         'highlight' => {
 544                 'sub' => sub { feature_bool('highlight', @_) },
 545                 'override' => 0,
 546                 'default' => [0]},
 547
 548         # Enable displaying of remote heads in the heads list
 549
 550         # To enable system wide have in $GITWEB_CONFIG
 551         # $feature{'remote_heads'}{'default'} = [1];
 552         # To have project specific config enable override in $GITWEB_CONFIG
 553         # $feature{'remote_heads'}{'override'} = 1;
 554         # and in project config gitweb.remoteheads = 0|1;
 555         'remote_heads' => {
 556                 'sub' => sub { feature_bool('remote_heads', @_) },
 557                 'override' => 0,
 558                 'default' => [0]},
 559
 560         # Enable showing branches under other refs in addition to heads
 561
 562         # To set system wide extra branch refs have in $GITWEB_CONFIG
 563         # $feature{'extra-branch-refs'}{'default'} = ['dirs', 'of', 'choice'];
 564         # To have project specific config enable override in $GITWEB_CONFIG
 565         # $feature{'extra-branch-refs'}{'override'} = 1;
 566         # and in project config gitweb.extrabranchrefs = dirs of choice
 567         # Every directory is separated with whitespace.
 568
 569         'extra-branch-refs' => {
 570                 'sub' => \&feature_extra_branch_refs,
 571                 'override' => 0,
 572                 'default' => []},
 573
 574         # Redact e-mail addresses.
 575
 576         # To enable system wide have in $GITWEB_CONFIG
 577         # $feature{'email-privacy'}{'default'} = [1];
 578         'email-privacy' => {
 579                 'sub' => sub { feature_bool('email-privacy', @_) },
 580                 'override' => 1,
 581                 'default' => [0]},
 582 );
 583
 584 sub gitweb_get_feature {
 585         my ($name) = @_;
 586         return unless exists $feature{$name};
 587         my ($sub, $override, @defaults) = (
 588                 $feature{$name}{'sub'},
 589                 $feature{$name}{'override'},
 590                 @{$feature{$name}{'default'}});
 591         # project specific override is possible only if we have project
 592         our $git_dir; # global variable, declared later
 593         if (!$override || !defined $git_dir) {
 594                 return @defaults;
 595         }
 596         if (!defined $sub) {
 597                 warn "feature $name is not overridable";
 598                 return @defaults;
 599         }
 600         return $sub->(@defaults);
 601 }
 602
 603 # A wrapper to check if a given feature is enabled.
 604 # With this, you can say
 605 #
 606 #   my $bool_feat = gitweb_check_feature('bool_feat');
 607 #   gitweb_check_feature('bool_feat') or somecode;
 608 #
 609 # instead of
 610 #
 611 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 612 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 613 #
 614 sub gitweb_check_feature {
 615         return (gitweb_get_feature(@_))[0];
 616 }
 617
 618
 619 sub feature_bool {
 620         my $key = shift;
 621         my ($val) = git_get_project_config($key, '--bool');
 622
 623         if (!defined $val) {
 624                 return ($_[0]);
 625         } elsif ($val eq 'true') {
 626                 return (1);
 627         } elsif ($val eq 'false') {
 628                 return (0);
 629         }
 630 }
 631
 632 sub feature_snapshot {
 633         my (@fmts) = @_;
 634
 635         my ($val) = git_get_project_config('snapshot');
 636
 637         if ($val) {
 638                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 639         }
 640
 641         return @fmts;
 642 }
 643
 644 sub feature_patches {
 645         my @val = (git_get_project_config('patches', '--int'));
 646
 647         if (@val) {
 648                 return @val;
 649         }
 650
 651         return ($_[0]);
 652 }
 653
 654 sub feature_avatar {
 655         my @val = (git_get_project_config('avatar'));
 656
 657         return @val ? @val : @_;
 658 }
 659
 660 sub feature_extra_branch_refs {
 661         my (@branch_refs) = @_;
 662         my $values = git_get_project_config('extrabranchrefs');
 663
 664         if ($values) {
 665                 $values = config_to_multi ($values);
 666                 @branch_refs = ();
 667                 foreach my $value (@{$values}) {
 668                         push @branch_refs, split /\s+/, $value;
 669                 }
 670         }
 671
 672         return @branch_refs;
 673 }
 674
 675 # checking HEAD file with -e is fragile if the repository was
 676 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 677 # and then pruned.
 678 sub check_head_link {
 679         my ($dir) = @_;
 680         my $headfile = "$dir/HEAD";
 681         return ((-e $headfile) ||
 682                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 683 }
 684
 685 sub check_export_ok {
 686         my ($dir) = @_;
 687         return (check_head_link($dir) &&
 688                 (!$export_ok || -e "$dir/$export_ok") &&
 689                 (!$export_auth_hook || $export_auth_hook->($dir)));
 690 }
 691
 692 # process alternate names for backward compatibility
 693 # filter out unsupported (unknown) snapshot formats
 694 sub filter_snapshot_fmts {
 695         my @fmts = @_;
 696
 697         @fmts = map {
 698                 exists $known_snapshot_format_aliases{$_} ?
 699                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 700         @fmts = grep {
 701                 exists $known_snapshot_formats{$_} &&
 702                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 703 }
 704
 705 sub filter_and_validate_refs {
 706         my @refs = @_;
 707         my %unique_refs = ();
 708
 709         foreach my $ref (@refs) {
 710                 die_error(500, "Invalid ref '$ref' in 'extra-branch-refs' feature") unless (is_valid_ref_format($ref));
 711                 # 'heads' are added implicitly in get_branch_refs().
 712                 $unique_refs{$ref} = 1 if ($ref ne 'heads');
 713         }
 714         return sort keys %unique_refs;
 715 }
 716
 717 # If it is set to code reference, it is code that it is to be run once per
 718 # request, allowing updating configurations that change with each request,
 719 # while running other code in config file only once.
 720 #
 721 # Otherwise, if it is false then gitweb would process config file only once;
 722 # if it is true then gitweb config would be run for each request.
 723 our $per_request_config = 1;
 724
 725 # read and parse gitweb config file given by its parameter.
 726 # returns true on success, false on recoverable error, allowing
 727 # to chain this subroutine, using first file that exists.
 728 # dies on errors during parsing config file, as it is unrecoverable.
 729 sub read_config_file {
 730         my $filename = shift;
 731         return unless defined $filename;
 732         # die if there are errors parsing config file
 733         if (-e $filename) {
 734                 do $filename;
 735                 die $@ if $@;
 736                 return 1;
 737         }
 738         return;
 739 }
 740
 741 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 742 sub evaluate_gitweb_config {
 743         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 744         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 745         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 746
 747         # Protect against duplications of file names, to not read config twice.
 748         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 749         # there possibility of duplication of filename there doesn't matter.
 750         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 751         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 752
 753         # Common system-wide settings for convenience.
 754         # Those settings can be overridden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 755         read_config_file($GITWEB_CONFIG_COMMON);
 756
 757         # Use first config file that exists.  This means use the per-instance
 758         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 759         read_config_file($GITWEB_CONFIG) and return;
 760         read_config_file($GITWEB_CONFIG_SYSTEM);
 761 }
 762
 763 # Get loadavg of system, to compare against $maxload.
 764 # Currently it requires '/proc/loadavg' present to get loadavg;
 765 # if it is not present it returns 0, which means no load checking.
 766 sub get_loadavg {
 767         if( -e '/proc/loadavg' ){
 768                 open my $fd, '<', '/proc/loadavg'
 769                         or return 0;
 770                 my @load = split(/\s+/, scalar <$fd>);
 771                 close $fd;
 772
 773                 # The first three columns measure CPU and IO utilization of the last one,
 774                 # five, and 10 minute periods.  The fourth column shows the number of
 775                 # currently running processes and the total number of processes in the m/n
 776                 # format.  The last column displays the last process ID used.
 777                 return $load[0] || 0;
 778         }
 779         # additional checks for load average should go here for things that don't export
 780         # /proc/loadavg
 781
 782         return 0;
 783 }
 784
 785 # version of the core git binary
 786 our $git_version;
 787 sub evaluate_git_version {
 788         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 789         $number_of_git_cmds++;
 790 }
 791
 792 sub check_loadavg {
 793         if (defined $maxload && get_loadavg() > $maxload) {
 794                 die_error(503, "The load average on the server is too high");
 795         }
 796 }
 797
 798 # ======================================================================
 799 # input validation and dispatch
 800
 801 # Various hash size-related values.
 802 my $sha1_len = 40;
 803 my $sha256_extra_len = 24;
 804 my $sha256_len = $sha1_len + $sha256_extra_len;
 805
 806 # A regex matching $len hex characters. $len may be a range (e.g. 7,64).
 807 sub oid_nlen_regex {
 808         my $len = shift;
 809         my $hchr = qr/[0-9a-fA-F]/;
 810         return qr/(?:(?:$hchr){$len})/;
 811 }
 812
 813 # A regex matching two sets of $nlen hex characters, prefixed by the literal
 814 # string $prefix and with the literal string $infix between them.
 815 sub oid_nlen_prefix_infix_regex {
 816         my $nlen = shift;
 817         my $prefix = shift;
 818         my $infix = shift;
 819
 820         my $rx = oid_nlen_regex($nlen);
 821
 822         return qr/^\Q$prefix\E$rx\Q$infix\E$rx$/;
 823 }
 824
 825 # A regex matching a valid object ID.
 826 our $oid_regex;
 827 {
 828         my $x = oid_nlen_regex($sha1_len);
 829         my $y = oid_nlen_regex($sha256_extra_len);
 830         $oid_regex = qr/(?:$x(?:$y)?)/;
 831 }
 832
 833 # input parameters can be collected from a variety of sources (presently, CGI
 834 # and PATH_INFO), so we define an %input_params hash that collects them all
 835 # together during validation: this allows subsequent uses (e.g. href()) to be
 836 # agnostic of the parameter origin
 837
 838 our %input_params = ();
 839
 840 # input parameters are stored with the long parameter name as key. This will
 841 # also be used in the href subroutine to convert parameters to their CGI
 842 # equivalent, and since the href() usage is the most frequent one, we store
 843 # the name -> CGI key mapping here, instead of the reverse.
 844 #
 845 # XXX: Warning: If you touch this, check the search form for updating,
 846 # too.
 847
 848 our @cgi_param_mapping = (
 849         project => "p",
 850         action => "a",
 851         file_name => "f",
 852         file_parent => "fp",
 853         hash => "h",
 854         hash_parent => "hp",
 855         hash_base => "hb",
 856         hash_parent_base => "hpb",
 857         page => "pg",
 858         order => "o",
 859         searchtext => "s",
 860         searchtype => "st",
 861         snapshot_format => "sf",
 862         extra_options => "opt",
 863         search_use_regexp => "sr",
 864         ctag => "by_tag",
 865         diff_style => "ds",
 866         project_filter => "pf",
 867         # this must be last entry (for manipulation from JavaScript)
 868         javascript => "js"
 869 );
 870 our %cgi_param_mapping = @cgi_param_mapping;
 871
 872 # we will also need to know the possible actions, for validation
 873 our %actions = (
 874         "blame" => \&git_blame,
 875         "blame_incremental" => \&git_blame_incremental,
 876         "blame_data" => \&git_blame_data,
 877         "blobdiff" => \&git_blobdiff,
 878         "blobdiff_plain" => \&git_blobdiff_plain,
 879         "blob" => \&git_blob,
 880         "blob_plain" => \&git_blob_plain,
 881         "commitdiff" => \&git_commitdiff,
 882         "commitdiff_plain" => \&git_commitdiff_plain,
 883         "commit" => \&git_commit,
 884         "forks" => \&git_forks,
 885         "heads" => \&git_heads,
 886         "history" => \&git_history,
 887         "log" => \&git_log,
 888         "patch" => \&git_patch,
 889         "patches" => \&git_patches,
 890         "remotes" => \&git_remotes,
 891         "rss" => \&git_rss,
 892         "atom" => \&git_atom,
 893         "search" => \&git_search,
 894         "search_help" => \&git_search_help,
 895         "shortlog" => \&git_shortlog,
 896         "summary" => \&git_summary,
 897         "tag" => \&git_tag,
 898         "tags" => \&git_tags,
 899         "tree" => \&git_tree,
 900         "snapshot" => \&git_snapshot,
 901         "object" => \&git_object,
 902         # those below don't need $project
 903         "opml" => \&git_opml,
 904         "project_list" => \&git_project_list,
 905         "project_index" => \&git_project_index,
 906 );
 907
 908 # finally, we have the hash of allowed extra_options for the commands that
 909 # allow them
 910 our %allowed_options = (
 911         "--no-merges" => [ qw(rss atom log shortlog history) ],
 912 );
 913
 914 # fill %input_params with the CGI parameters. All values except for 'opt'
 915 # should be single values, but opt can be an array. We should probably
 916 # build an array of parameters that can be multi-valued, but since for the time
 917 # being it's only this one, we just single it out
 918 sub evaluate_query_params {
 919         our $cgi;
 920
 921         while (my ($name, $symbol) = each %cgi_param_mapping) {
 922                 if ($symbol eq 'opt') {
 923                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->multi_param($symbol) ];
 924                 } else {
 925                         $input_params{$name} = decode_utf8($cgi->param($symbol));
 926                 }
 927         }
 928 }
 929
 930 # now read PATH_INFO and update the parameter list for missing parameters
 931 sub evaluate_path_info {
 932         return if defined $input_params{'project'};
 933         return if !$path_info;
 934         $path_info =~ s,^/+,,;
 935         return if !$path_info;
 936
 937         # find which part of PATH_INFO is project
 938         my $project = $path_info;
 939         $project =~ s,/+$,,;
 940         while ($project && !check_head_link("$projectroot/$project")) {
 941                 $project =~ s,/*[^/]*$,,;
 942         }
 943         return unless $project;
 944         $input_params{'project'} = $project;
 945
 946         # do not change any parameters if an action is given using the query string
 947         return if $input_params{'action'};
 948         $path_info =~ s,^\Q$project\E/*,,;
 949
 950         # next, check if we have an action
 951         my $action = $path_info;
 952         $action =~ s,/.*$,,;
 953         if (exists $actions{$action}) {
 954                 $path_info =~ s,^$action/*,,;
 955                 $input_params{'action'} = $action;
 956         }
 957
 958         # list of actions that want hash_base instead of hash, but can have no
 959         # pathname (f) parameter
 960         my @wants_base = (
 961                 'tree',
 962                 'history',
 963         );
 964
 965         # we want to catch, among others
 966         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 967         my ($parentrefname, $parentpathname, $refname, $pathname) =
 968                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 969
 970         # first, analyze the 'current' part
 971         if (defined $pathname) {
 972                 # we got "branch:filename" or "branch:dir/"
 973                 # we could use git_get_type(branch:pathname), but:
 974                 # - it needs $git_dir
 975                 # - it does a git() call
 976                 # - the convention of terminating directories with a slash
 977                 #   makes it superfluous
 978                 # - embedding the action in the PATH_INFO would make it even
 979                 #   more superfluous
 980                 $pathname =~ s,^/+,,;
 981                 if (!$pathname || substr($pathname, -1) eq "/") {
 982                         $input_params{'action'} ||= "tree";
 983                         $pathname =~ s,/$,,;
 984                 } else {
 985                         # the default action depends on whether we had parent info
 986                         # or not
 987                         if ($parentrefname) {
 988                                 $input_params{'action'} ||= "blobdiff_plain";
 989                         } else {
 990                                 $input_params{'action'} ||= "blob_plain";
 991                         }
 992                 }
 993                 $input_params{'hash_base'} ||= $refname;
 994                 $input_params{'file_name'} ||= $pathname;
 995         } elsif (defined $refname) {
 996                 # we got "branch". In this case we have to choose if we have to
 997                 # set hash or hash_base.
 998                 #
 999                 # Most of the actions without a pathname only want hash to be
1000                 # set, except for the ones specified in @wants_base that want
1001                 # hash_base instead. It should also be noted that hand-crafted
1002                 # links having 'history' as an action and no pathname or hash
1003                 # set will fail, but that happens regardless of PATH_INFO.
1004                 if (defined $parentrefname) {
1005                         # if there is parent let the default be 'shortlog' action
1006                         # (for http://git.example.com/repo.git/A..B links); if there
1007                         # is no parent, dispatch will detect type of object and set
1008                         # action appropriately if required (if action is not set)
1009                         $input_params{'action'} ||= "shortlog";
1010                 }
1011                 if ($input_params{'action'} &&
1012                     grep { $_ eq $input_params{'action'} } @wants_base) {
1013                         $input_params{'hash_base'} ||= $refname;
1014                 } else {
1015                         $input_params{'hash'} ||= $refname;
1016                 }
1017         }
1018
1019         # next, handle the 'parent' part, if present
1020         if (defined $parentrefname) {
1021                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
1022                 # someproject/blobdiff/oldrev..newrev:/filename
1023                 if ($parentpathname) {
1024                         $parentpathname =~ s,^/+,,;
1025                         $parentpathname =~ s,/$,,;
1026                         $input_params{'file_parent'} ||= $parentpathname;
1027                 } else {
1028                         $input_params{'file_parent'} ||= $input_params{'file_name'};
1029                 }
1030                 # we assume that hash_parent_base is wanted if a path was specified,
1031                 # or if the action wants hash_base instead of hash
1032                 if (defined $input_params{'file_parent'} ||
1033                         grep { $_ eq $input_params{'action'} } @wants_base) {
1034                         $input_params{'hash_parent_base'} ||= $parentrefname;
1035                 } else {
1036                         $input_params{'hash_parent'} ||= $parentrefname;
1037                 }
1038         }
1039
1040         # for the snapshot action, we allow URLs in the form
1041         # $project/snapshot/$hash.ext
1042         # where .ext determines the snapshot and gets removed from the
1043         # passed $refname to provide the $hash.
1044         #
1045         # To be able to tell that $refname includes the format extension, we
1046         # require the following two conditions to be satisfied:
1047         # - the hash input parameter MUST have been set from the $refname part
1048         #   of the URL (i.e. they must be equal)
1049         # - the snapshot format MUST NOT have been defined already (e.g. from
1050         #   CGI parameter sf)
1051         # It's also useless to try any matching unless $refname has a dot,
1052         # so we check for that too
1053         if (defined $input_params{'action'} &&
1054                 $input_params{'action'} eq 'snapshot' &&
1055                 defined $refname && index($refname, '.') != -1 &&
1056                 $refname eq $input_params{'hash'} &&
1057                 !defined $input_params{'snapshot_format'}) {
1058                 # We loop over the known snapshot formats, checking for
1059                 # extensions. Allowed extensions are both the defined suffix
1060                 # (which includes the initial dot already) and the snapshot
1061                 # format key itself, with a prepended dot
1062                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
1063                         my $hash = $refname;
1064                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
1065                                 next;
1066                         }
1067                         my $sfx = $1;
1068                         # a valid suffix was found, so set the snapshot format
1069                         # and reset the hash parameter
1070                         $input_params{'snapshot_format'} = $fmt;
1071                         $input_params{'hash'} = $hash;
1072                         # we also set the format suffix to the one requested
1073                         # in the URL: this way a request for e.g. .tgz returns
1074                         # a .tgz instead of a .tar.gz
1075                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
1076                         last;
1077                 }
1078         }
1079 }
1080
1081 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
1082      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
1083      $searchtext, $search_regexp, $project_filter);
1084 sub evaluate_and_validate_params {
1085         our $action = $input_params{'action'};
1086         if (defined $action) {
1087                 if (!is_valid_action($action)) {
1088                         die_error(400, "Invalid action parameter");
1089                 }
1090         }
1091
1092         # parameters which are pathnames
1093         our $project = $input_params{'project'};
1094         if (defined $project) {
1095                 if (!is_valid_project($project)) {
1096                         undef $project;
1097                         die_error(404, "No such project");
1098                 }
1099         }
1100
1101         our $project_filter = $input_params{'project_filter'};
1102         if (defined $project_filter) {
1103                 if (!is_valid_pathname($project_filter)) {
1104                         die_error(404, "Invalid project_filter parameter");
1105                 }
1106         }
1107
1108         our $file_name = $input_params{'file_name'};
1109         if (defined $file_name) {
1110                 if (!is_valid_pathname($file_name)) {
1111                         die_error(400, "Invalid file parameter");
1112                 }
1113         }
1114
1115         our $file_parent = $input_params{'file_parent'};
1116         if (defined $file_parent) {
1117                 if (!is_valid_pathname($file_parent)) {
1118                         die_error(400, "Invalid file parent parameter");
1119                 }
1120         }
1121
1122         # parameters which are refnames
1123         our $hash = $input_params{'hash'};
1124         if (defined $hash) {
1125                 if (!is_valid_refname($hash)) {
1126                         die_error(400, "Invalid hash parameter");
1127                 }
1128         }
1129
1130         our $hash_parent = $input_params{'hash_parent'};
1131         if (defined $hash_parent) {
1132                 if (!is_valid_refname($hash_parent)) {
1133                         die_error(400, "Invalid hash parent parameter");
1134                 }
1135         }
1136
1137         our $hash_base = $input_params{'hash_base'};
1138         if (defined $hash_base) {
1139                 if (!is_valid_refname($hash_base)) {
1140                         die_error(400, "Invalid hash base parameter");
1141                 }
1142         }
1143
1144         our @extra_options = @{$input_params{'extra_options'}};
1145         # @extra_options is always defined, since it can only be (currently) set from
1146         # CGI, and $cgi->param() returns the empty array in array context if the param
1147         # is not set
1148         foreach my $opt (@extra_options) {
1149                 if (not exists $allowed_options{$opt}) {
1150                         die_error(400, "Invalid option parameter");
1151                 }
1152                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1153                         die_error(400, "Invalid option parameter for this action");
1154                 }
1155         }
1156
1157         our $hash_parent_base = $input_params{'hash_parent_base'};
1158         if (defined $hash_parent_base) {
1159                 if (!is_valid_refname($hash_parent_base)) {
1160                         die_error(400, "Invalid hash parent base parameter");
1161                 }
1162         }
1163
1164         # other parameters
1165         our $page = $input_params{'page'};
1166         if (defined $page) {
1167                 if ($page =~ m/[^0-9]/) {
1168                         die_error(400, "Invalid page parameter");
1169                 }
1170         }
1171
1172         our $searchtype = $input_params{'searchtype'};
1173         if (defined $searchtype) {
1174                 if ($searchtype =~ m/[^a-z]/) {
1175                         die_error(400, "Invalid searchtype parameter");
1176                 }
1177         }
1178
1179         our $search_use_regexp = $input_params{'search_use_regexp'};
1180
1181         our $searchtext = $input_params{'searchtext'};
1182         our $search_regexp = undef;
1183         if (defined $searchtext) {
1184                 if (length($searchtext) < 2) {
1185                         die_error(403, "At least two characters are required for search parameter");
1186                 }
1187                 if ($search_use_regexp) {
1188                         $search_regexp = $searchtext;
1189                         if (!eval { qr/$search_regexp/; 1; }) {
1190                                 (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1191                                 die_error(400, "Invalid search regexp '$search_regexp'",
1192                                           esc_html($error));
1193                         }
1194                 } else {
1195                         $search_regexp = quotemeta $searchtext;
1196                 }
1197         }
1198 }
1199
1200 # path to the current git repository
1201 our $git_dir;
1202 sub evaluate_git_dir {
1203         our $git_dir = "$projectroot/$project" if $project;
1204 }
1205
1206 our (@snapshot_fmts, $git_avatar, @extra_branch_refs);
1207 sub configure_gitweb_features {
1208         # list of supported snapshot formats
1209         our @snapshot_fmts = gitweb_get_feature('snapshot');
1210         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1211
1212         our ($git_avatar) = gitweb_get_feature('avatar');
1213         $git_avatar = '' unless $git_avatar =~ /^(?:gravatar|picon)$/s;
1214
1215         our @extra_branch_refs = gitweb_get_feature('extra-branch-refs');
1216         @extra_branch_refs = filter_and_validate_refs (@extra_branch_refs);
1217 }
1218
1219 sub get_branch_refs {
1220         return ('heads', @extra_branch_refs);
1221 }
1222
1223 # custom error handler: 'die <message>' is Internal Server Error
1224 sub handle_errors_html {
1225         my $msg = shift; # it is already HTML escaped
1226
1227         # to avoid infinite loop where error occurs in die_error,
1228         # change handler to default handler, disabling handle_errors_html
1229         set_message("Error occurred when inside die_error:\n$msg");
1230
1231         # you cannot jump out of die_error when called as error handler;
1232         # the subroutine set via CGI::Carp::set_message is called _after_
1233         # HTTP headers are already written, so it cannot write them itself
1234         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1235 }
1236 set_message(\&handle_errors_html);
1237
1238 # dispatch
1239 sub dispatch {
1240         if (!defined $action) {
1241                 if (defined $hash) {
1242                         $action = git_get_type($hash);
1243                         $action or die_error(404, "Object does not exist");
1244                 } elsif (defined $hash_base && defined $file_name) {
1245                         $action = git_get_type("$hash_base:$file_name");
1246                         $action or die_error(404, "File or directory does not exist");
1247                 } elsif (defined $project) {
1248                         $action = 'summary';
1249                 } else {
1250                         $action = 'project_list';
1251                 }
1252         }
1253         if (!defined($actions{$action})) {
1254                 die_error(400, "Unknown action");
1255         }
1256         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1257             !$project) {
1258                 die_error(400, "Project needed");
1259         }
1260         $actions{$action}->();
1261 }
1262
1263 sub reset_timer {
1264         our $t0 = [ gettimeofday() ]
1265                 if defined $t0;
1266         our $number_of_git_cmds = 0;
1267 }
1268
1269 our $first_request = 1;
1270 sub run_request {
1271         reset_timer();
1272
1273         evaluate_uri();
1274         if ($first_request) {
1275                 evaluate_gitweb_config();
1276                 evaluate_git_version();
1277         }
1278         if ($per_request_config) {
1279                 if (ref($per_request_config) eq 'CODE') {
1280                         $per_request_config->();
1281                 } elsif (!$first_request) {
1282                         evaluate_gitweb_config();
1283                 }
1284         }
1285         check_loadavg();
1286
1287         # $projectroot and $projects_list might be set in gitweb config file
1288         $projects_list ||= $projectroot;
1289
1290         evaluate_query_params();
1291         evaluate_path_info();
1292         evaluate_and_validate_params();
1293         evaluate_git_dir();
1294
1295         configure_gitweb_features();
1296
1297         dispatch();
1298 }
1299
1300 our $is_last_request = sub { 1 };
1301 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1302 our $CGI = 'CGI';
1303 our $cgi;
1304 our $FCGI_Stream_PRINT_raw = \&FCGI::Stream::PRINT;
1305 sub configure_as_fcgi {
1306         require CGI::Fast;
1307         our $CGI = 'CGI::Fast';
1308         # FCGI is not Unicode aware hence the UTF-8 encoding must be done manually.
1309         # However no encoding must be done within git_blob_plain() and git_snapshot()
1310         # which must still output in raw binary mode.
1311         no warnings 'redefine';
1312         my $enc = Encode::find_encoding('UTF-8');
1313         *FCGI::Stream::PRINT = sub {
1314                 my @OUTPUT = @_;
1315                 for (my $i = 1; $i < @_; $i++) {
1316                         $OUTPUT[$i] = $enc->encode($_[$i], Encode::FB_CROAK|Encode::LEAVE_SRC);
1317                 }
1318                 @_ = @OUTPUT;
1319                 goto $FCGI_Stream_PRINT_raw;
1320         };
1321
1322         my $request_number = 0;
1323         # let each child service 100 requests
1324         our $is_last_request = sub { ++$request_number > 100 };
1325 }
1326 sub evaluate_argv {
1327         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1328         configure_as_fcgi()
1329                 if $script_name =~ /\.fcgi$/;
1330
1331         return unless (@ARGV);
1332
1333         require Getopt::Long;
1334         Getopt::Long::GetOptions(
1335                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1336                 'nproc|n=i' => sub {
1337                         my ($arg, $val) = @_;
1338                         return unless eval { require FCGI::ProcManager; 1; };
1339                         my $proc_manager = FCGI::ProcManager->new({
1340                                 n_processes => $val,
1341                         });
1342                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1343                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1344                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1345                 },
1346         );
1347 }
1348
1349 sub run {
1350         evaluate_argv();
1351
1352         $first_request = 1;
1353         $pre_listen_hook->()
1354                 if $pre_listen_hook;
1355
1356  REQUEST:
1357         while ($cgi = $CGI->new()) {
1358                 $pre_dispatch_hook->()
1359                         if $pre_dispatch_hook;
1360
1361                 run_request();
1362
1363                 $post_dispatch_hook->()
1364                         if $post_dispatch_hook;
1365                 $first_request = 0;
1366
1367                 last REQUEST if ($is_last_request->());
1368         }
1369
1370  DONE_GITWEB:
1371         1;
1372 }
1373
1374 run();
1375
1376 if (defined caller) {
1377         # wrapped in a subroutine processing requests,
1378         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1379         return;
1380 } else {
1381         # pure CGI script, serving single request
1382         exit;
1383 }
1384
1385 ## ======================================================================
1386 ## action links
1387
1388 # possible values of extra options
1389 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1390 # -replay => 1      - start from a current view (replay with modifications)
1391 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1392 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1393 sub href {
1394         my %params = @_;
1395         # default is to use -absolute url() i.e. $my_uri
1396         my $href = $params{-full} ? $my_url : $my_uri;
1397
1398         # implicit -replay, must be first of implicit params
1399         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1400
1401         $params{'project'} = $project unless exists $params{'project'};
1402
1403         if ($params{-replay}) {
1404                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1405                         if (!exists $params{$name}) {
1406                                 $params{$name} = $input_params{$name};
1407                         }
1408                 }
1409         }
1410
1411         my $use_pathinfo = gitweb_check_feature('pathinfo');
1412         if (defined $params{'project'} &&
1413             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1414                 # try to put as many parameters as possible in PATH_INFO:
1415                 #   - project name
1416                 #   - action
1417                 #   - hash_parent or hash_parent_base:/file_parent
1418                 #   - hash or hash_base:/filename
1419                 #   - the snapshot_format as an appropriate suffix
1420
1421                 # When the script is the root DirectoryIndex for the domain,
1422                 # $href here would be something like http://gitweb.example.com/
1423                 # Thus, we strip any trailing / from $href, to spare us double
1424                 # slashes in the final URL
1425                 $href =~ s,/$,,;
1426
1427                 # Then add the project name, if present
1428                 $href .= "/".esc_path_info($params{'project'});
1429                 delete $params{'project'};
1430
1431                 # since we destructively absorb parameters, we keep this
1432                 # boolean that remembers if we're handling a snapshot
1433                 my $is_snapshot = $params{'action'} eq 'snapshot';
1434
1435                 # Summary just uses the project path URL, any other action is
1436                 # added to the URL
1437                 if (defined $params{'action'}) {
1438                         $href .= "/".esc_path_info($params{'action'})
1439                                 unless $params{'action'} eq 'summary';
1440                         delete $params{'action'};
1441                 }
1442
1443                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1444                 # stripping nonexistent or useless pieces
1445                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1446                         || $params{'hash_parent'} || $params{'hash'});
1447                 if (defined $params{'hash_base'}) {
1448                         if (defined $params{'hash_parent_base'}) {
1449                                 $href .= esc_path_info($params{'hash_parent_base'});
1450                                 # skip the file_parent if it's the same as the file_name
1451                                 if (defined $params{'file_parent'}) {
1452                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1453                                                 delete $params{'file_parent'};
1454                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1455                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1456                                                 delete $params{'file_parent'};
1457                                         }
1458                                 }
1459                                 $href .= "..";
1460                                 delete $params{'hash_parent'};
1461                                 delete $params{'hash_parent_base'};
1462                         } elsif (defined $params{'hash_parent'}) {
1463                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1464                                 delete $params{'hash_parent'};
1465                         }
1466
1467                         $href .= esc_path_info($params{'hash_base'});
1468                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1469                                 $href .= ":/".esc_path_info($params{'file_name'});
1470                                 delete $params{'file_name'};
1471                         }
1472                         delete $params{'hash'};
1473                         delete $params{'hash_base'};
1474                 } elsif (defined $params{'hash'}) {
1475                         $href .= esc_path_info($params{'hash'});
1476                         delete $params{'hash'};
1477                 }
1478
1479                 # If the action was a snapshot, we can absorb the
1480                 # snapshot_format parameter too
1481                 if ($is_snapshot) {
1482                         my $fmt = $params{'snapshot_format'};
1483                         # snapshot_format should always be defined when href()
1484                         # is called, but just in case some code forgets, we
1485                         # fall back to the default
1486                         $fmt ||= $snapshot_fmts[0];
1487                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1488                         delete $params{'snapshot_format'};
1489                 }
1490         }
1491
1492         # now encode the parameters explicitly
1493         my @result = ();
1494         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1495                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1496                 if (defined $params{$name}) {
1497                         if (ref($params{$name}) eq "ARRAY") {
1498                                 foreach my $par (@{$params{$name}}) {
1499                                         push @result, $symbol . "=" . esc_param($par);
1500                                 }
1501                         } else {
1502                                 push @result, $symbol . "=" . esc_param($params{$name});
1503                         }
1504                 }
1505         }
1506         $href .= "?" . join(';', @result) if scalar @result;
1507
1508         # final transformation: trailing spaces must be escaped (URI-encoded)
1509         $href =~ s/(\s+)$/CGI::escape($1)/e;
1510
1511         if ($params{-anchor}) {
1512                 $href .= "#".esc_param($params{-anchor});
1513         }
1514
1515         return $href;
1516 }
1517
1518
1519 ## ======================================================================
1520 ## validation, quoting/unquoting and escaping
1521
1522 sub is_valid_action {
1523         my $input = shift;
1524         return undef unless exists $actions{$input};
1525         return 1;
1526 }
1527
1528 sub is_valid_project {
1529         my $input = shift;
1530
1531         return unless defined $input;
1532         if (!is_valid_pathname($input) ||
1533                 !(-d "$projectroot/$input") ||
1534                 !check_export_ok("$projectroot/$input") ||
1535                 ($strict_export && !project_in_list($input))) {
1536                 return undef;
1537         } else {
1538                 return 1;
1539         }
1540 }
1541
1542 sub is_valid_pathname {
1543         my $input = shift;
1544
1545         return undef unless defined $input;
1546         # no '.' or '..' as elements of path, i.e. no '.' or '..'
1547         # at the beginning, at the end, and between slashes.
1548         # also this catches doubled slashes
1549         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1550                 return undef;
1551         }
1552         # no null characters
1553         if ($input =~ m!\0!) {
1554                 return undef;
1555         }
1556         return 1;
1557 }
1558
1559 sub is_valid_ref_format {
1560         my $input = shift;
1561
1562         return undef unless defined $input;
1563         # restrictions on ref name according to git-check-ref-format
1564         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1565                 return undef;
1566         }
1567         return 1;
1568 }
1569
1570 sub is_valid_refname {
1571         my $input = shift;
1572
1573         return undef unless defined $input;
1574         # textual hashes are O.K.
1575         if ($input =~ m/^$oid_regex$/) {
1576                 return 1;
1577         }
1578         # it must be correct pathname
1579         is_valid_pathname($input) or return undef;
1580         # check git-check-ref-format restrictions
1581         is_valid_ref_format($input) or return undef;
1582         return 1;
1583 }
1584
1585 # decode sequences of octets in utf8 into Perl's internal form,
1586 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1587 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1588 sub to_utf8 {
1589         my $str = shift;
1590         return undef unless defined $str;
1591
1592         if (utf8::is_utf8($str) || utf8::decode($str)) {
1593                 return $str;
1594         } else {
1595                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1596         }
1597 }
1598
1599 # quote unsafe chars, but keep the slash, even when it's not
1600 # correct, but quoted slashes look too horrible in bookmarks
1601 sub esc_param {
1602         my $str = shift;
1603         return undef unless defined $str;
1604         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1605         $str =~ s/ /\+/g;
1606         return $str;
1607 }
1608
1609 # the quoting rules for path_info fragment are slightly different
1610 sub esc_path_info {
1611         my $str = shift;
1612         return undef unless defined $str;
1613
1614         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1615         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1616
1617         return $str;
1618 }
1619
1620 # quote unsafe chars in whole URL, so some characters cannot be quoted
1621 sub esc_url {
1622         my $str = shift;
1623         return undef unless defined $str;
1624         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1625         $str =~ s/ /\+/g;
1626         return $str;
1627 }
1628
1629 # quote unsafe characters in HTML attributes
1630 sub esc_attr {
1631
1632         # for XHTML conformance escaping '"' to '&quot;' is not enough
1633         return esc_html(@_);
1634 }
1635
1636 # replace invalid utf8 character with SUBSTITUTION sequence
1637 sub esc_html {
1638         my $str = shift;
1639         my %opts = @_;
1640
1641         return undef unless defined $str;
1642
1643         $str = to_utf8($str);
1644         $str = $cgi->escapeHTML($str);
1645         if ($opts{'-nbsp'}) {
1646                 $str =~ s/ /&nbsp;/g;
1647         }
1648         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1649         return $str;
1650 }
1651
1652 # quote control characters and escape filename to HTML
1653 sub esc_path {
1654         my $str = shift;
1655         my %opts = @_;
1656
1657         return undef unless defined $str;
1658
1659         $str = to_utf8($str);
1660         $str = $cgi->escapeHTML($str);
1661         if ($opts{'-nbsp'}) {
1662                 $str =~ s/ /&nbsp;/g;
1663         }
1664         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1665         return $str;
1666 }
1667
1668 # Sanitize for use in XHTML + application/xml+xhtml (valid XML 1.0)
1669 sub sanitize {
1670         my $str = shift;
1671
1672         return undef unless defined $str;
1673
1674         $str = to_utf8($str);
1675         $str =~ s|([[:cntrl:]])|(index("\t\n\r", $1) != -1 ? $1 : quot_cec($1))|eg;
1676         return $str;
1677 }
1678
1679 # Make control characters "printable", using character escape codes (CEC)
1680 sub quot_cec {
1681         my $cntrl = shift;
1682         my %opts = @_;
1683         my %es = ( # character escape codes, aka escape sequences
1684                 "\t" => '\t',   # tab             (HT)
1685                 "\n" => '\n',   # line feed       (LF)
1686                 "\r" => '\r',   # carriage return (CR)
1687                 "\f" => '\f',   # form feed       (FF)
1688                 "\b" => '\b',   # backspace       (BS)
1689                 "\a" => '\a',   # alarm (bell)    (BEL)
1690                 "\e" => '\e',   # escape          (ESC)
1691                 "\013" => '\v', # vertical tab    (VT)
1692                 "\000" => '\0', # nul character   (NUL)
1693         );
1694         my $chr = ( (exists $es{$cntrl})
1695                     ? $es{$cntrl}
1696                     : sprintf('\%2x', ord($cntrl)) );
1697         if ($opts{-nohtml}) {
1698                 return $chr;
1699         } else {
1700                 return "<span class=\"cntrl\">$chr</span>";
1701         }
1702 }
1703
1704 # Alternatively use unicode control pictures codepoints,
1705 # Unicode "printable representation" (PR)
1706 sub quot_upr {
1707         my $cntrl = shift;
1708         my %opts = @_;
1709
1710         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1711         if ($opts{-nohtml}) {
1712                 return $chr;
1713         } else {
1714                 return "<span class=\"cntrl\">$chr</span>";
1715         }
1716 }
1717
1718 # git may return quoted and escaped filenames
1719 sub unquote {
1720         my $str = shift;
1721
1722         sub unq {
1723                 my $seq = shift;
1724                 my %es = ( # character escape codes, aka escape sequences
1725                         't' => "\t",   # tab            (HT, TAB)
1726                         'n' => "\n",   # newline        (NL)
1727                         'r' => "\r",   # return         (CR)
1728                         'f' => "\f",   # form feed      (FF)
1729                         'b' => "\b",   # backspace      (BS)
1730                         'a' => "\a",   # alarm (bell)   (BEL)
1731                         'e' => "\e",   # escape         (ESC)
1732                         'v' => "\013", # vertical tab   (VT)
1733                 );
1734
1735                 if ($seq =~ m/^[0-7]{1,3}$/) {
1736                         # octal char sequence
1737                         return chr(oct($seq));
1738                 } elsif (exists $es{$seq}) {
1739                         # C escape sequence, aka character escape code
1740                         return $es{$seq};
1741                 }
1742                 # quoted ordinary character
1743                 return $seq;
1744         }
1745
1746         if ($str =~ m/^"(.*)"$/) {
1747                 # needs unquoting
1748                 $str = $1;
1749                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1750         }
1751         return $str;
1752 }
1753
1754 # escape tabs (convert tabs to spaces)
1755 sub untabify {
1756         my $line = shift;
1757
1758         while ((my $pos = index($line, "\t")) != -1) {
1759                 if (my $count = (8 - ($pos % 8))) {
1760                         my $spaces = ' ' x $count;
1761                         $line =~ s/\t/$spaces/;
1762                 }
1763         }
1764
1765         return $line;
1766 }
1767
1768 sub project_in_list {
1769         my $project = shift;
1770         my @list = git_get_projects_list();
1771         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1772 }
1773
1774 ## ----------------------------------------------------------------------
1775 ## HTML aware string manipulation
1776
1777 # Try to chop given string on a word boundary between position
1778 # $len and $len+$add_len. If there is no word boundary there,
1779 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1780 # (marking chopped part) would be longer than given string.
1781 sub chop_str {
1782         my $str = shift;
1783         my $len = shift;
1784         my $add_len = shift || 10;
1785         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1786
1787         # Make sure perl knows it is utf8 encoded so we don't
1788         # cut in the middle of a utf8 multibyte char.
1789         $str = to_utf8($str);
1790
1791         # allow only $len chars, but don't cut a word if it would fit in $add_len
1792         # if it doesn't fit, cut it if it's still longer than the dots we would add
1793         # remove chopped character entities entirely
1794
1795         # when chopping in the middle, distribute $len into left and right part
1796         # return early if chopping wouldn't make string shorter
1797         if ($where eq 'center') {
1798                 return $str if ($len + 5 >= length($str)); # filler is length 5
1799                 $len = int($len/2);
1800         } else {
1801                 return $str if ($len + 4 >= length($str)); # filler is length 4
1802         }
1803
1804         # regexps: ending and beginning with word part up to $add_len
1805         my $endre = qr/.{$len}\w{0,$add_len}/;
1806         my $begre = qr/\w{0,$add_len}.{$len}/;
1807
1808         if ($where eq 'left') {
1809                 $str =~ m/^(.*?)($begre)$/;
1810                 my ($lead, $body) = ($1, $2);
1811                 if (length($lead) > 4) {
1812                         $lead = " ...";
1813                 }
1814                 return "$lead$body";
1815
1816         } elsif ($where eq 'center') {
1817                 $str =~ m/^($endre)(.*)$/;
1818                 my ($left, $str)  = ($1, $2);
1819                 $str =~ m/^(.*?)($begre)$/;
1820                 my ($mid, $right) = ($1, $2);
1821                 if (length($mid) > 5) {
1822                         $mid = " ... ";
1823                 }
1824                 return "$left$mid$right";
1825
1826         } else {
1827                 $str =~ m/^($endre)(.*)$/;
1828                 my $body = $1;
1829                 my $tail = $2;
1830                 if (length($tail) > 4) {
1831                         $tail = "... ";
1832                 }
1833                 return "$body$tail";
1834         }
1835 }
1836
1837 # takes the same arguments as chop_str, but also wraps a <span> around the
1838 # result with a title attribute if it does get chopped. Additionally, the
1839 # string is HTML-escaped.
1840 sub chop_and_escape_str {
1841         my ($str) = @_;
1842
1843         my $chopped = chop_str(@_);
1844         $str = to_utf8($str);
1845         if ($chopped eq $str) {
1846                 return esc_html($chopped);
1847         } else {
1848                 $str =~ s/[[:cntrl:]]/?/g;
1849                 return $cgi->span({-title=>$str}, esc_html($chopped));
1850         }
1851 }
1852
1853 # Highlight selected fragments of string, using given CSS class,
1854 # and escape HTML.  It is assumed that fragments do not overlap.
1855 # Regions are passed as list of pairs (array references).
1856 #
1857 # Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1858 # '<span class="mark">foo</span>bar'
1859 sub esc_html_hl_regions {
1860         my ($str, $css_class, @sel) = @_;
1861         my %opts = grep { ref($_) ne 'ARRAY' } @sel;
1862         @sel     = grep { ref($_) eq 'ARRAY' } @sel;
1863         return esc_html($str, %opts) unless @sel;
1864
1865         my $out = '';
1866         my $pos = 0;
1867
1868         for my $s (@sel) {
1869                 my ($begin, $end) = @$s;
1870
1871                 # Don't create empty <span> elements.
1872                 next if $end <= $begin;
1873
1874                 my $escaped = esc_html(substr($str, $begin, $end - $begin),
1875                                        %opts);
1876
1877                 $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
1878                         if ($begin - $pos > 0);
1879                 $out .= $cgi->span({-class => $css_class}, $escaped);
1880
1881                 $pos = $end;
1882         }
1883         $out .= esc_html(substr($str, $pos), %opts)
1884                 if ($pos < length($str));
1885
1886         return $out;
1887 }
1888
1889 # return positions of beginning and end of each match
1890 sub matchpos_list {
1891         my ($str, $regexp) = @_;
1892         return unless (defined $str && defined $regexp);
1893
1894         my @matches;
1895         while ($str =~ /$regexp/g) {
1896                 push @matches, [$-[0], $+[0]];
1897         }
1898         return @matches;
1899 }
1900
1901 # highlight match (if any), and escape HTML
1902 sub esc_html_match_hl {
1903         my ($str, $regexp) = @_;
1904         return esc_html($str) unless defined $regexp;
1905
1906         my @matches = matchpos_list($str, $regexp);
1907         return esc_html($str) unless @matches;
1908
1909         return esc_html_hl_regions($str, 'match', @matches);
1910 }
1911
1912
1913 # highlight match (if any) of shortened string, and escape HTML
1914 sub esc_html_match_hl_chopped {
1915         my ($str, $chopped, $regexp) = @_;
1916         return esc_html_match_hl($str, $regexp) unless defined $chopped;
1917
1918         my @matches = matchpos_list($str, $regexp);
1919         return esc_html($chopped) unless @matches;
1920
1921         # filter matches so that we mark chopped string
1922         my $tail = "... "; # see chop_str
1923         unless ($chopped =~ s/\Q$tail\E$//) {
1924                 $tail = '';
1925         }
1926         my $chop_len = length($chopped);
1927         my $tail_len = length($tail);
1928         my @filtered;
1929
1930         for my $m (@matches) {
1931                 if ($m->[0] > $chop_len) {
1932                         push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1933                         last;
1934                 } elsif ($m->[1] > $chop_len) {
1935                         push @filtered, [ $m->[0], $chop_len + $tail_len ];
1936                         last;
1937                 }
1938                 push @filtered, $m;
1939         }
1940
1941         return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1942 }
1943
1944 ## ----------------------------------------------------------------------
1945 ## functions returning short strings
1946
1947 # CSS class for given age value (in seconds)
1948 sub age_class {
1949         my $age = shift;
1950
1951         if (!defined $age) {
1952                 return "noage";
1953         } elsif ($age < 60*60*2) {
1954                 return "age0";
1955         } elsif ($age < 60*60*24*2) {
1956                 return "age1";
1957         } else {
1958                 return "age2";
1959         }
1960 }
1961
1962 # convert age in seconds to "nn units ago" string
1963 sub age_string {
1964         my $age = shift;
1965         my $age_str;
1966
1967         if ($age > 60*60*24*365*2) {
1968                 $age_str = (int $age/60/60/24/365);
1969                 $age_str .= " years ago";
1970         } elsif ($age > 60*60*24*(365/12)*2) {
1971                 $age_str = int $age/60/60/24/(365/12);
1972                 $age_str .= " months ago";
1973         } elsif ($age > 60*60*24*7*2) {
1974                 $age_str = int $age/60/60/24/7;
1975                 $age_str .= " weeks ago";
1976         } elsif ($age > 60*60*24*2) {
1977                 $age_str = int $age/60/60/24;
1978                 $age_str .= " days ago";
1979         } elsif ($age > 60*60*2) {
1980                 $age_str = int $age/60/60;
1981                 $age_str .= " hours ago";
1982         } elsif ($age > 60*2) {
1983                 $age_str = int $age/60;
1984                 $age_str .= " min ago";
1985         } elsif ($age > 2) {
1986                 $age_str = int $age;
1987                 $age_str .= " sec ago";
1988         } else {
1989                 $age_str .= " right now";
1990         }
1991         return $age_str;
1992 }
1993
1994 use constant {
1995         S_IFINVALID => 0030000,
1996         S_IFGITLINK => 0160000,
1997 };
1998
1999 # submodule/subproject, a commit object reference
2000 sub S_ISGITLINK {
2001         my $mode = shift;
2002
2003         return (($mode & S_IFMT) == S_IFGITLINK)
2004 }
2005
2006 # convert file mode in octal to symbolic file mode string
2007 sub mode_str {
2008         my $mode = oct shift;
2009
2010         if (S_ISGITLINK($mode)) {
2011                 return 'm---------';
2012         } elsif (S_ISDIR($mode & S_IFMT)) {
2013                 return 'drwxr-xr-x';
2014         } elsif (S_ISLNK($mode)) {
2015                 return 'lrwxrwxrwx';
2016         } elsif (S_ISREG($mode)) {
2017                 # git cares only about the executable bit
2018                 if ($mode & S_IXUSR) {
2019                         return '-rwxr-xr-x';
2020                 } else {
2021                         return '-rw-r--r--';
2022                 };
2023         } else {
2024                 return '----------';
2025         }
2026 }
2027
2028 # convert file mode in octal to file type string
2029 sub file_type {
2030         my $mode = shift;
2031
2032         if ($mode !~ m/^[0-7]+$/) {
2033                 return $mode;
2034         } else {
2035                 $mode = oct $mode;
2036         }
2037
2038         if (S_ISGITLINK($mode)) {
2039                 return "submodule";
2040         } elsif (S_ISDIR($mode & S_IFMT)) {
2041                 return "directory";
2042         } elsif (S_ISLNK($mode)) {
2043                 return "symlink";
2044         } elsif (S_ISREG($mode)) {
2045                 return "file";
2046         } else {
2047                 return "unknown";
2048         }
2049 }
2050
2051 # convert file mode in octal to file type description string
2052 sub file_type_long {
2053         my $mode = shift;
2054
2055         if ($mode !~ m/^[0-7]+$/) {
2056                 return $mode;
2057         } else {
2058                 $mode = oct $mode;
2059         }
2060
2061         if (S_ISGITLINK($mode)) {
2062                 return "submodule";
2063         } elsif (S_ISDIR($mode & S_IFMT)) {
2064                 return "directory";
2065         } elsif (S_ISLNK($mode)) {
2066                 return "symlink";
2067         } elsif (S_ISREG($mode)) {
2068                 if ($mode & S_IXUSR) {
2069                         return "executable";
2070                 } else {
2071                         return "file";
2072                 };
2073         } else {
2074                 return "unknown";
2075         }
2076 }
2077
2078
2079 ## ----------------------------------------------------------------------
2080 ## functions returning short HTML fragments, or transforming HTML fragments
2081 ## which don't belong to other sections
2082
2083 # format line of commit message.
2084 sub format_log_line_html {
2085         my $line = shift;
2086
2087         # Potentially abbreviated OID.
2088         my $regex = oid_nlen_regex("7,64");
2089
2090         $line = esc_html($line, -nbsp=>1);
2091         $line =~ s{
2092         \b
2093         (
2094             # The output of "git describe", e.g. v2.10.0-297-gf6727b0
2095             # or hadoop-20160921-113441-20-g094fb7d
2096             (?<!-) # see strbuf_check_tag_ref(). Tags can't start with -
2097             [A-Za-z0-9.-]+
2098             (?!\.) # refs can't end with ".", see check_refname_format()
2099             -g$regex
2100             |
2101             # Just a normal looking Git SHA1
2102             $regex
2103         )
2104         \b
2105     }{
2106                 $cgi->a({-href => href(action=>"object", hash=>$1),
2107                                         -class => "text"}, $1);
2108         }egx;
2109
2110         return $line;
2111 }
2112
2113 # format marker of refs pointing to given object
2114
2115 # the destination action is chosen based on object type and current context:
2116 # - for annotated tags, we choose the tag view unless it's the current view
2117 #   already, in which case we go to shortlog view
2118 # - for other refs, we keep the current view if we're in history, shortlog or
2119 #   log view, and select shortlog otherwise
2120 sub format_ref_marker {
2121         my ($refs, $id) = @_;
2122         my $markers = '';
2123
2124         if (defined $refs->{$id}) {
2125                 foreach my $ref (@{$refs->{$id}}) {
2126                         # this code exploits the fact that non-lightweight tags are the
2127                         # only indirect objects, and that they are the only objects for which
2128                         # we want to use tag instead of shortlog as action
2129                         my ($type, $name) = qw();
2130                         my $indirect = ($ref =~ s/\^\{\}$//);
2131                         # e.g. tags/v2.6.11 or heads/next
2132                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
2133                                 $type = $1;
2134                                 $name = $2;
2135                         } else {
2136                                 $type = "ref";
2137                                 $name = $ref;
2138                         }
2139
2140                         my $class = $type;
2141                         $class .= " indirect" if $indirect;
2142
2143                         my $dest_action = "shortlog";
2144
2145                         if ($indirect) {
2146                                 $dest_action = "tag" unless $action eq "tag";
2147                         } elsif ($action =~ /^(history|(short)?log)$/) {
2148                                 $dest_action = $action;
2149                         }
2150
2151                         my $dest = "";
2152                         $dest .= "refs/" unless $ref =~ m!^refs/!;
2153                         $dest .= $ref;
2154
2155                         my $link = $cgi->a({
2156                                 -href => href(
2157                                         action=>$dest_action,
2158                                         hash=>$dest
2159                                 )}, esc_html($name));
2160
2161                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2162                                 $link . "</span>";
2163                 }
2164         }
2165
2166         if ($markers) {
2167                 return ' <span class="refs">'. $markers . '</span>';
2168         } else {
2169                 return "";
2170         }
2171 }
2172
2173 # format, perhaps shortened and with markers, title line
2174 sub format_subject_html {
2175         my ($long, $short, $href, $extra) = @_;
2176         $extra = '' unless defined($extra);
2177
2178         if (length($short) < length($long)) {
2179                 $long =~ s/[[:cntrl:]]/?/g;
2180                 return $cgi->a({-href => $href, -class => "list subject",
2181                                 -title => to_utf8($long)},
2182                        esc_html($short)) . $extra;
2183         } else {
2184                 return $cgi->a({-href => $href, -class => "list subject"},
2185                        esc_html($long)) . $extra;
2186         }
2187 }
2188
2189 # Rather than recomputing the url for an email multiple times, we cache it
2190 # after the first hit. This gives a visible benefit in views where the avatar
2191 # for the same email is used repeatedly (e.g. shortlog).
2192 # The cache is shared by all avatar engines (currently gravatar only), which
2193 # are free to use it as preferred. Since only one avatar engine is used for any
2194 # given page, there's no risk for cache conflicts.
2195 our %avatar_cache = ();
2196
2197 # Compute the picon url for a given email, by using the picon search service over at
2198 # http://www.cs.indiana.edu/picons/search.html
2199 sub picon_url {
2200         my $email = lc shift;
2201         if (!$avatar_cache{$email}) {
2202                 my ($user, $domain) = split('@', $email);
2203                 $avatar_cache{$email} =
2204                         "//www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2205                         "$domain/$user/" .
2206                         "users+domains+unknown/up/single";
2207         }
2208         return $avatar_cache{$email};
2209 }
2210
2211 # Compute the gravatar url for a given email, if it's not in the cache already.
2212 # Gravatar stores only the part of the URL before the size, since that's the
2213 # one computationally more expensive. This also allows reuse of the cache for
2214 # different sizes (for this particular engine).
2215 sub gravatar_url {
2216         my $email = lc shift;
2217         my $size = shift;
2218         $avatar_cache{$email} ||=
2219                 "//www.gravatar.com/avatar/" .
2220                         md5_hex($email) . "?s=";
2221         return $avatar_cache{$email} . $size;
2222 }
2223
2224 # Insert an avatar for the given $email at the given $size if the feature
2225 # is enabled.
2226 sub git_get_avatar {
2227         my ($email, %opts) = @_;
2228         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2229         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2230         $opts{-size} ||= 'default';
2231         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2232         my $url = "";
2233         if ($git_avatar eq 'gravatar') {
2234                 $url = gravatar_url($email, $size);
2235         } elsif ($git_avatar eq 'picon') {
2236                 $url = picon_url($email);
2237         }
2238         # Other providers can be added by extending the if chain, defining $url
2239         # as needed. If no variant puts something in $url, we assume avatars
2240         # are completely disabled/unavailable.
2241         if ($url) {
2242                 return $pre_white .
2243                        "<img width=\"$size\" " .
2244                             "class=\"avatar\" " .
2245                             "src=\"".esc_url($url)."\" " .
2246                             "alt=\"\" " .
2247                        "/>" . $post_white;
2248         } else {
2249                 return "";
2250         }
2251 }
2252
2253 sub format_search_author {
2254         my ($author, $searchtype, $displaytext) = @_;
2255         my $have_search = gitweb_check_feature('search');
2256
2257         if ($have_search) {
2258                 my $performed = "";
2259                 if ($searchtype eq 'author') {
2260                         $performed = "authored";
2261                 } elsif ($searchtype eq 'committer') {
2262                         $performed = "committed";
2263                 }
2264
2265                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2266                                 searchtext=>$author,
2267                                 searchtype=>$searchtype), class=>"list",
2268                                 title=>"Search for commits $performed by $author"},
2269                                 $displaytext);
2270
2271         } else {
2272                 return $displaytext;
2273         }
2274 }
2275
2276 # format the author name of the given commit with the given tag
2277 # the author name is chopped and escaped according to the other
2278 # optional parameters (see chop_str).
2279 sub format_author_html {
2280         my $tag = shift;
2281         my $co = shift;
2282         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2283         return "<$tag class=\"author\">" .
2284                format_search_author($co->{'author_name'}, "author",
2285                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2286                        $author) .
2287                "</$tag>";
2288 }
2289
2290 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2291 sub format_git_diff_header_line {
2292         my $line = shift;
2293         my $diffinfo = shift;
2294         my ($from, $to) = @_;
2295
2296         if ($diffinfo->{'nparents'}) {
2297                 # combined diff
2298                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2299                 if ($to->{'href'}) {
2300                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2301                                          esc_path($to->{'file'}));
2302                 } else { # file was deleted (no href)
2303                         $line .= esc_path($to->{'file'});
2304                 }
2305         } else {
2306                 # "ordinary" diff
2307                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2308                 if ($from->{'href'}) {
2309                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2310                                          'a/' . esc_path($from->{'file'}));
2311                 } else { # file was added (no href)
2312                         $line .= 'a/' . esc_path($from->{'file'});
2313                 }
2314                 $line .= ' ';
2315                 if ($to->{'href'}) {
2316                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2317                                          'b/' . esc_path($to->{'file'}));
2318                 } else { # file was deleted
2319                         $line .= 'b/' . esc_path($to->{'file'});
2320                 }
2321         }
2322
2323         return "<div class=\"diff header\">$line</div>\n";
2324 }
2325
2326 # format extended diff header line, before patch itself
2327 sub format_extended_diff_header_line {
2328         my $line = shift;
2329         my $diffinfo = shift;
2330         my ($from, $to) = @_;
2331
2332         # match <path>
2333         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2334                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2335                                        esc_path($from->{'file'}));
2336         }
2337         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2338                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2339                                  esc_path($to->{'file'}));
2340         }
2341         # match single <mode>
2342         if ($line =~ m/\s(\d{6})$/) {
2343                 $line .= '<span class="info"> (' .
2344                          file_type_long($1) .
2345                          ')</span>';
2346         }
2347         # match <hash>
2348         if ($line =~ oid_nlen_prefix_infix_regex($sha1_len, "index ", ",") |
2349             $line =~ oid_nlen_prefix_infix_regex($sha256_len, "index ", ",")) {
2350                 # can match only for combined diff
2351                 $line = 'index ';
2352                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2353                         if ($from->{'href'}[$i]) {
2354                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2355                                                   -class=>"hash"},
2356                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2357                         } else {
2358                                 $line .= '0' x 7;
2359                         }
2360                         # separator
2361                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2362                 }
2363                 $line .= '..';
2364                 if ($to->{'href'}) {
2365                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2366                                          substr($diffinfo->{'to_id'},0,7));
2367                 } else {
2368                         $line .= '0' x 7;
2369                 }
2370
2371         } elsif ($line =~ oid_nlen_prefix_infix_regex($sha1_len, "index ", "..") |
2372                  $line =~ oid_nlen_prefix_infix_regex($sha256_len, "index ", "..")) {
2373                 # can match only for ordinary diff
2374                 my ($from_link, $to_link);
2375                 if ($from->{'href'}) {
2376                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2377                                              substr($diffinfo->{'from_id'},0,7));
2378                 } else {
2379                         $from_link = '0' x 7;
2380                 }
2381                 if ($to->{'href'}) {
2382                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2383                                            substr($diffinfo->{'to_id'},0,7));
2384                 } else {
2385                         $to_link = '0' x 7;
2386                 }
2387                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2388                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2389         }
2390
2391         return $line . "<br/>\n";
2392 }
2393
2394 # format from-file/to-file diff header
2395 sub format_diff_from_to_header {
2396         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2397         my $line;
2398         my $result = '';
2399
2400         $line = $from_line;
2401         #assert($line =~ m/^---/) if DEBUG;
2402         # no extra formatting for "^--- /dev/null"
2403         if (! $diffinfo->{'nparents'}) {
2404                 # ordinary (single parent) diff
2405                 if ($line =~ m!^--- "?a/!) {
2406                         if ($from->{'href'}) {
2407                                 $line = '--- a/' .
2408                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2409                                                 esc_path($from->{'file'}));
2410                         } else {
2411                                 $line = '--- a/' .
2412                                         esc_path($from->{'file'});
2413                         }
2414                 }
2415                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2416
2417         } else {
2418                 # combined diff (merge commit)
2419                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2420                         if ($from->{'href'}[$i]) {
2421                                 $line = '--- ' .
2422                                         $cgi->a({-href=>href(action=>"blobdiff",
2423                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2424                                                              hash_parent_base=>$parents[$i],
2425                                                              file_parent=>$from->{'file'}[$i],
2426                                                              hash=>$diffinfo->{'to_id'},
2427                                                              hash_base=>$hash,
2428                                                              file_name=>$to->{'file'}),
2429                                                  -class=>"path",
2430                                                  -title=>"diff" . ($i+1)},
2431                                                 $i+1) .
2432                                         '/' .
2433                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2434                                                 esc_path($from->{'file'}[$i]));
2435                         } else {
2436                                 $line = '--- /dev/null';
2437                         }
2438                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2439                 }
2440         }
2441
2442         $line = $to_line;
2443         #assert($line =~ m/^\+\+\+/) if DEBUG;
2444         # no extra formatting for "^+++ /dev/null"
2445         if ($line =~ m!^\+\+\+ "?b/!) {
2446                 if ($to->{'href'}) {
2447                         $line = '+++ b/' .
2448                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2449                                         esc_path($to->{'file'}));
2450                 } else {
2451                         $line = '+++ b/' .
2452                                 esc_path($to->{'file'});
2453                 }
2454         }
2455         $result .= qq!<div class="diff to_file">$line</div>\n!;
2456
2457         return $result;
2458 }
2459
2460 # create note for patch simplified by combined diff
2461 sub format_diff_cc_simplified {
2462         my ($diffinfo, @parents) = @_;
2463         my $result = '';
2464
2465         $result .= "<div class=\"diff header\">" .
2466                    "diff --cc ";
2467         if (!is_deleted($diffinfo)) {
2468                 $result .= $cgi->a({-href => href(action=>"blob",
2469                                                   hash_base=>$hash,
2470                                                   hash=>$diffinfo->{'to_id'},
2471                                                   file_name=>$diffinfo->{'to_file'}),
2472                                     -class => "path"},
2473                                    esc_path($diffinfo->{'to_file'}));
2474         } else {
2475                 $result .= esc_path($diffinfo->{'to_file'});
2476         }
2477         $result .= "</div>\n" . # class="diff header"
2478                    "<div class=\"diff nodifferences\">" .
2479                    "Simple merge" .
2480                    "</div>\n"; # class="diff nodifferences"
2481
2482         return $result;
2483 }
2484
2485 sub diff_line_class {
2486         my ($line, $from, $to) = @_;
2487
2488         # ordinary diff
2489         my $num_sign = 1;
2490         # combined diff
2491         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2492                 $num_sign = scalar @{$from->{'href'}};
2493         }
2494
2495         my @diff_line_classifier = (
2496                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2497                 { regexp => qr/^\\/,               class => "incomplete"  },
2498                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2499                 # classifier for context must come before classifier add/rem,
2500                 # or we would have to use more complicated regexp, for example
2501                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2502                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2503                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2504         );
2505         for my $clsfy (@diff_line_classifier) {
2506                 return $clsfy->{'class'}
2507                         if ($line =~ $clsfy->{'regexp'});
2508         }
2509
2510         # fallback
2511         return "";
2512 }
2513
2514 # assumes that $from and $to are defined and correctly filled,
2515 # and that $line holds a line of chunk header for unified diff
2516 sub format_unidiff_chunk_header {
2517         my ($line, $from, $to) = @_;
2518
2519         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2520                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2521
2522         $from_lines = 0 unless defined $from_lines;
2523         $to_lines   = 0 unless defined $to_lines;
2524
2525         if ($from->{'href'}) {
2526                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2527                                      -class=>"list"}, $from_text);
2528         }
2529         if ($to->{'href'}) {
2530                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2531                                      -class=>"list"}, $to_text);
2532         }
2533         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2534                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2535         return $line;
2536 }
2537
2538 # assumes that $from and $to are defined and correctly filled,
2539 # and that $line holds a line of chunk header for combined diff
2540 sub format_cc_diff_chunk_header {
2541         my ($line, $from, $to) = @_;
2542
2543         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2544         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2545
2546         @from_text = split(' ', $ranges);
2547         for (my $i = 0; $i < @from_text; ++$i) {
2548                 ($from_start[$i], $from_nlines[$i]) =
2549                         (split(',', substr($from_text[$i], 1)), 0);
2550         }
2551
2552         $to_text   = pop @from_text;
2553         $to_start  = pop @from_start;
2554         $to_nlines = pop @from_nlines;
2555
2556         $line = "<span class=\"chunk_info\">$prefix ";
2557         for (my $i = 0; $i < @from_text; ++$i) {
2558                 if ($from->{'href'}[$i]) {
2559                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2560                                           -class=>"list"}, $from_text[$i]);
2561                 } else {
2562                         $line .= $from_text[$i];
2563                 }
2564                 $line .= " ";
2565         }
2566         if ($to->{'href'}) {
2567                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2568                                   -class=>"list"}, $to_text);
2569         } else {
2570                 $line .= $to_text;
2571         }
2572         $line .= " $prefix</span>" .
2573                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2574         return $line;
2575 }
2576
2577 # process patch (diff) line (not to be used for diff headers),
2578 # returning HTML-formatted (but not wrapped) line.
2579 # If the line is passed as a reference, it is treated as HTML and not
2580 # esc_html()'ed.
2581 sub format_diff_line {
2582         my ($line, $diff_class, $from, $to) = @_;
2583
2584         if (ref($line)) {
2585                 $line = $$line;
2586         } else {
2587                 chomp $line;
2588                 $line = untabify($line);
2589
2590                 if ($from && $to && $line =~ m/^\@{2} /) {
2591                         $line = format_unidiff_chunk_header($line, $from, $to);
2592                 } elsif ($from && $to && $line =~ m/^\@{3}/) {
2593                         $line = format_cc_diff_chunk_header($line, $from, $to);
2594                 } else {
2595                         $line = esc_html($line, -nbsp=>1);
2596                 }
2597         }
2598
2599         my $diff_classes = "diff";
2600         $diff_classes .= " $diff_class" if ($diff_class);
2601         $line = "<div class=\"$diff_classes\">$line</div>\n";
2602
2603         return $line;
2604 }
2605
2606 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2607 # linked.  Pass the hash of the tree/commit to snapshot.
2608 sub format_snapshot_links {
2609         my ($hash) = @_;
2610         my $num_fmts = @snapshot_fmts;
2611         if ($num_fmts > 1) {
2612                 # A parenthesized list of links bearing format names.
2613                 # e.g. "snapshot (_tar.gz_ _zip_)"
2614                 return "snapshot (" . join(' ', map
2615                         $cgi->a({
2616                                 -href => href(
2617                                         action=>"snapshot",
2618                                         hash=>$hash,
2619                                         snapshot_format=>$_
2620                                 )
2621                         }, $known_snapshot_formats{$_}{'display'})
2622                 , @snapshot_fmts) . ")";
2623         } elsif ($num_fmts == 1) {
2624                 # A single "snapshot" link whose tooltip bears the format name.
2625                 # i.e. "_snapshot_"
2626                 my ($fmt) = @snapshot_fmts;
2627                 return
2628                         $cgi->a({
2629                                 -href => href(
2630                                         action=>"snapshot",
2631                                         hash=>$hash,
2632                                         snapshot_format=>$fmt
2633                                 ),
2634                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2635                         }, "snapshot");
2636         } else { # $num_fmts == 0
2637                 return undef;
2638         }
2639 }
2640
2641 ## ......................................................................
2642 ## functions returning values to be passed, perhaps after some
2643 ## transformation, to other functions; e.g. returning arguments to href()
2644
2645 # returns hash to be passed to href to generate gitweb URL
2646 # in -title key it returns description of link
2647 sub get_feed_info {
2648         my $format = shift || 'Atom';
2649         my %res = (action => lc($format));
2650         my $matched_ref = 0;
2651
2652         # feed links are possible only for project views
2653         return unless (defined $project);
2654         # some views should link to OPML, or to generic project feed,
2655         # or don't have specific feed yet (so they should use generic)
2656         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2657
2658         my $branch = undef;
2659         # branches refs uses 'refs/' + $get_branch_refs()[x] + '/' prefix
2660         # (fullname) to differentiate from tag links; this also makes
2661         # possible to detect branch links
2662         for my $ref (get_branch_refs()) {
2663                 if ((defined $hash_base && $hash_base =~ m!^refs/\Q$ref\E/(.*)$!) ||
2664                     (defined $hash      && $hash      =~ m!^refs/\Q$ref\E/(.*)$!)) {
2665                         $branch = $1;
2666                         $matched_ref = $ref;
2667                         last;
2668                 }
2669         }
2670         # find log type for feed description (title)
2671         my $type = 'log';
2672         if (defined $file_name) {
2673                 $type  = "history of $file_name";
2674                 $type .= "/" if ($action eq 'tree');
2675                 $type .= " on '$branch'" if (defined $branch);
2676         } else {
2677                 $type = "log of $branch" if (defined $branch);
2678         }
2679
2680         $res{-title} = $type;
2681         $res{'hash'} = (defined $branch ? "refs/$matched_ref/$branch" : undef);
2682         $res{'file_name'} = $file_name;
2683
2684         return %res;
2685 }
2686
2687 ## ----------------------------------------------------------------------
2688 ## git utility subroutines, invoking git commands
2689
2690 # returns path to the core git executable and the --git-dir parameter as list
2691 sub git_cmd {
2692         $number_of_git_cmds++;
2693         return $GIT, '--git-dir='.$git_dir;
2694 }
2695
2696 # quote the given arguments for passing them to the shell
2697 # quote_command("command", "arg 1", "arg with ' and ! characters")
2698 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2699 # Try to avoid using this function wherever possible.
2700 sub quote_command {
2701         return join(' ',
2702                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2703 }
2704
2705 # get HEAD ref of given project as hash
2706 sub git_get_head_hash {
2707         return git_get_full_hash(shift, 'HEAD');
2708 }
2709
2710 sub git_get_full_hash {
2711         return git_get_hash(@_);
2712 }
2713
2714 sub git_get_short_hash {
2715         return git_get_hash(@_, '--short=7');
2716 }
2717
2718 sub git_get_hash {
2719         my ($project, $hash, @options) = @_;
2720         my $o_git_dir = $git_dir;
2721         my $retval = undef;
2722         $git_dir = "$projectroot/$project";
2723         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2724             '--verify', '-q', @options, $hash) {
2725                 $retval = <$fd>;
2726                 chomp $retval if defined $retval;
2727                 close $fd;
2728         }
2729         if (defined $o_git_dir) {
2730                 $git_dir = $o_git_dir;
2731         }
2732         return $retval;
2733 }
2734
2735 # get type of given object
2736 sub git_get_type {
2737         my $hash = shift;
2738
2739         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2740         my $type = <$fd>;
2741         close $fd or return;
2742         chomp $type;
2743         return $type;
2744 }
2745
2746 # repository configuration
2747 our $config_file = '';
2748 our %config;
2749
2750 # store multiple values for single key as anonymous array reference
2751 # single values stored directly in the hash, not as [ <value> ]
2752 sub hash_set_multi {
2753         my ($hash, $key, $value) = @_;
2754
2755         if (!exists $hash->{$key}) {
2756                 $hash->{$key} = $value;
2757         } elsif (!ref $hash->{$key}) {
2758                 $hash->{$key} = [ $hash->{$key}, $value ];
2759         } else {
2760                 push @{$hash->{$key}}, $value;
2761         }
2762 }
2763
2764 # return hash of git project configuration
2765 # optionally limited to some section, e.g. 'gitweb'
2766 sub git_parse_project_config {
2767         my $section_regexp = shift;
2768         my %config;
2769
2770         local $/ = "\0";
2771
2772         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2773                 or return;
2774
2775         while (my $keyval = <$fh>) {
2776                 chomp $keyval;
2777                 my ($key, $value) = split(/\n/, $keyval, 2);
2778
2779                 hash_set_multi(\%config, $key, $value)
2780                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2781         }
2782         close $fh;
2783
2784         return %config;
2785 }
2786
2787 # convert config value to boolean: 'true' or 'false'
2788 # no value, number > 0, 'true' and 'yes' values are true
2789 # rest of values are treated as false (never as error)
2790 sub config_to_bool {
2791         my $val = shift;
2792
2793         return 1 if !defined $val;             # section.key
2794
2795         # strip leading and trailing whitespace
2796         $val =~ s/^\s+//;
2797         $val =~ s/\s+$//;
2798
2799         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2800                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2801 }
2802
2803 # convert config value to simple decimal number
2804 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2805 # to be multiplied by 1024, 1048576, or 1073741824
2806 sub config_to_int {
2807         my $val = shift;
2808
2809         # strip leading and trailing whitespace
2810         $val =~ s/^\s+//;
2811         $val =~ s/\s+$//;
2812
2813         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2814                 $unit = lc($unit);
2815                 # unknown unit is treated as 1
2816                 return $num * ($unit eq 'g' ? 1073741824 :
2817                                $unit eq 'm' ?    1048576 :
2818                                $unit eq 'k' ?       1024 : 1);
2819         }
2820         return $val;
2821 }
2822
2823 # convert config value to array reference, if needed
2824 sub config_to_multi {
2825         my $val = shift;
2826
2827         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2828 }
2829
2830 sub git_get_project_config {
2831         my ($key, $type) = @_;
2832
2833         return unless defined $git_dir;
2834
2835         # key sanity check
2836         return unless ($key);
2837         # only subsection, if exists, is case sensitive,
2838         # and not lowercased by 'git config -z -l'
2839         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2840                 $lo =~ s/_//g;
2841                 $key = join(".", lc($hi), $mi, lc($lo));
2842                 return if ($lo =~ /\W/ || $hi =~ /\W/);
2843         } else {
2844                 $key = lc($key);
2845                 $key =~ s/_//g;
2846                 return if ($key =~ /\W/);
2847         }
2848         $key =~ s/^gitweb\.//;
2849
2850         # type sanity check
2851         if (defined $type) {
2852                 $type =~ s/^--//;
2853                 $type = undef
2854                         unless ($type eq 'bool' || $type eq 'int');
2855         }
2856
2857         # get config
2858         if (!defined $config_file ||
2859             $config_file ne "$git_dir/config") {
2860                 %config = git_parse_project_config('gitweb');
2861                 $config_file = "$git_dir/config";
2862         }
2863
2864         # check if config variable (key) exists
2865         return unless exists $config{"gitweb.$key"};
2866
2867         # ensure given type
2868         if (!defined $type) {
2869                 return $config{"gitweb.$key"};
2870         } elsif ($type eq 'bool') {
2871                 # backward compatibility: 'git config --bool' returns true/false
2872                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2873         } elsif ($type eq 'int') {
2874                 return config_to_int($config{"gitweb.$key"});
2875         }
2876         return $config{"gitweb.$key"};
2877 }
2878
2879 # get hash of given path at given ref
2880 sub git_get_hash_by_path {
2881         my $base = shift;
2882         my $path = shift || return undef;
2883         my $type = shift;
2884
2885         $path =~ s,/+$,,;
2886
2887         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2888                 or die_error(500, "Open git-ls-tree failed");
2889         my $line = <$fd>;
2890         close $fd or return undef;
2891
2892         if (!defined $line) {
2893                 # there is no tree or hash given by $path at $base
2894                 return undef;
2895         }
2896
2897         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2898         $line =~ m/^([0-9]+) (.+) ($oid_regex)\t/;
2899         if (defined $type && $type ne $2) {
2900                 # type doesn't match
2901                 return undef;
2902         }
2903         return $3;
2904 }
2905
2906 # get path of entry with given hash at given tree-ish (ref)
2907 # used to get 'from' filename for combined diff (merge commit) for renames
2908 sub git_get_path_by_hash {
2909         my $base = shift || return;
2910         my $hash = shift || return;
2911
2912         local $/ = "\0";
2913
2914         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2915                 or return undef;
2916         while (my $line = <$fd>) {
2917                 chomp $line;
2918
2919                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2920                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2921                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2922                         close $fd;
2923                         return $1;
2924                 }
2925         }
2926         close $fd;
2927         return undef;
2928 }
2929
2930 ## ......................................................................
2931 ## git utility functions, directly accessing git repository
2932
2933 # get the value of config variable either from file named as the variable
2934 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2935 # configuration variable in the repository config file.
2936 sub git_get_file_or_project_config {
2937         my ($path, $name) = @_;
2938
2939         $git_dir = "$projectroot/$path";
2940         open my $fd, '<', "$git_dir/$name"
2941                 or return git_get_project_config($name);
2942         my $conf = <$fd>;
2943         close $fd;
2944         if (defined $conf) {
2945                 chomp $conf;
2946         }
2947         return $conf;
2948 }
2949
2950 sub git_get_project_description {
2951         my $path = shift;
2952         return git_get_file_or_project_config($path, 'description');
2953 }
2954
2955 sub git_get_project_category {
2956         my $path = shift;
2957         return git_get_file_or_project_config($path, 'category');
2958 }
2959
2960
2961 # supported formats:
2962 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2963 #   - if its contents is a number, use it as tag weight,
2964 #   - otherwise add a tag with weight 1
2965 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2966 #   the same value multiple times increases tag weight
2967 # * `gitweb.ctag' multi-valued repo config variable
2968 sub git_get_project_ctags {
2969         my $project = shift;
2970         my $ctags = {};
2971
2972         $git_dir = "$projectroot/$project";
2973         if (opendir my $dh, "$git_dir/ctags") {
2974                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2975                 foreach my $tagfile (@files) {
2976                         open my $ct, '<', $tagfile
2977                                 or next;
2978                         my $val = <$ct>;
2979                         chomp $val if $val;
2980                         close $ct;
2981
2982                         (my $ctag = $tagfile) =~ s#.*/##;
2983                         if ($val =~ /^\d+$/) {
2984                                 $ctags->{$ctag} = $val;
2985                         } else {
2986                                 $ctags->{$ctag} = 1;
2987                         }
2988                 }
2989                 closedir $dh;
2990
2991         } elsif (open my $fh, '<', "$git_dir/ctags") {
2992                 while (my $line = <$fh>) {
2993                         chomp $line;
2994                         $ctags->{$line}++ if $line;
2995                 }
2996                 close $fh;
2997
2998         } else {
2999                 my $taglist = config_to_multi(git_get_project_config('ctag'));
3000                 foreach my $tag (@$taglist) {
3001                         $ctags->{$tag}++;
3002                 }
3003         }
3004
3005         return $ctags;
3006 }
3007
3008 # return hash, where keys are content tags ('ctags'),
3009 # and values are sum of weights of given tag in every project
3010 sub git_gather_all_ctags {
3011         my $projects = shift;
3012         my $ctags = {};
3013
3014         foreach my $p (@$projects) {
3015                 foreach my $ct (keys %{$p->{'ctags'}}) {
3016                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
3017                 }
3018         }
3019
3020         return $ctags;
3021 }
3022
3023 sub git_populate_project_tagcloud {
3024         my $ctags = shift;
3025
3026         # First, merge different-cased tags; tags vote on casing
3027         my %ctags_lc;
3028         foreach (keys %$ctags) {
3029                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
3030                 if (not $ctags_lc{lc $_}->{topcount}
3031                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
3032                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
3033                         $ctags_lc{lc $_}->{topname} = $_;
3034                 }
3035         }
3036
3037         my $cloud;
3038         my $matched = $input_params{'ctag'};
3039         if (eval { require HTML::TagCloud; 1; }) {
3040                 $cloud = HTML::TagCloud->new;
3041                 foreach my $ctag (sort keys %ctags_lc) {
3042                         # Pad the title with spaces so that the cloud looks
3043                         # less crammed.
3044                         my $title = esc_html($ctags_lc{$ctag}->{topname});
3045                         $title =~ s/ /&nbsp;/g;
3046                         $title =~ s/^/&nbsp;/g;
3047                         $title =~ s/$/&nbsp;/g;
3048                         if (defined $matched && $matched eq $ctag) {
3049                                 $title = qq(<span class="match">$title</span>);
3050                         }
3051                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
3052                                     $ctags_lc{$ctag}->{count});
3053                 }
3054         } else {
3055                 $cloud = {};
3056                 foreach my $ctag (keys %ctags_lc) {
3057                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
3058                         if (defined $matched && $matched eq $ctag) {
3059                                 $title = qq(<span class="match">$title</span>);
3060                         }
3061                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
3062                         $cloud->{$ctag}{ctag} =
3063                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
3064                 }
3065         }
3066         return $cloud;
3067 }
3068
3069 sub git_show_project_tagcloud {
3070         my ($cloud, $count) = @_;
3071         if (ref $cloud eq 'HTML::TagCloud') {
3072                 return $cloud->html_and_css($count);
3073         } else {
3074                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
3075                 return
3076                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
3077                         join (', ', map {
3078                                 $cloud->{$_}->{'ctag'}
3079                         } splice(@tags, 0, $count)) .
3080                         '</div>';
3081         }
3082 }
3083
3084 sub git_get_project_url_list {
3085         my $path = shift;
3086
3087         $git_dir = "$projectroot/$path";
3088         open my $fd, '<', "$git_dir/cloneurl"
3089                 or return wantarray ?
3090                 @{ config_to_multi(git_get_project_config('url')) } :
3091                    config_to_multi(git_get_project_config('url'));
3092         my @git_project_url_list = map { chomp; $_ } <$fd>;
3093         close $fd;
3094
3095         return wantarray ? @git_project_url_list : \@git_project_url_list;
3096 }
3097
3098 sub git_get_projects_list {
3099         my $filter = shift || '';
3100         my $paranoid = shift;
3101         my @list;
3102
3103         if (-d $projects_list) {
3104                 # search in directory
3105                 my $dir = $projects_list;
3106                 # remove the trailing "/"
3107                 $dir =~ s!/+$!!;
3108                 my $pfxlen = length("$dir");
3109                 my $pfxdepth = ($dir =~ tr!/!!);
3110                 # when filtering, search only given subdirectory
3111                 if ($filter && !$paranoid) {
3112                         $dir .= "/$filter";
3113                         $dir =~ s!/+$!!;
3114                 }
3115
3116                 File::Find::find({
3117                         follow_fast => 1, # follow symbolic links
3118                         follow_skip => 2, # ignore duplicates
3119                         dangling_symlinks => 0, # ignore dangling symlinks, silently
3120                         wanted => sub {
3121                                 # global variables
3122                                 our $project_maxdepth;
3123                                 our $projectroot;
3124                                 # skip project-list toplevel, if we get it.
3125                                 return if (m!^[/.]$!);
3126                                 # only directories can be git repositories
3127                                 return unless (-d $_);
3128                                 # need search permission
3129                                 return unless (-x $_);
3130                                 # don't traverse too deep (Find is super slow on os x)
3131                                 # $project_maxdepth excludes depth of $projectroot
3132                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
3133                                         $File::Find::prune = 1;
3134                                         return;
3135                                 }
3136
3137                                 my $path = substr($File::Find::name, $pfxlen + 1);
3138                                 # paranoidly only filter here
3139                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
3140                                         next;
3141                                 }
3142                                 # we check related file in $projectroot
3143                                 if (check_export_ok("$projectroot/$path")) {
3144                                         push @list, { path => $path };
3145                                         $File::Find::prune = 1;
3146                                 }
3147                         },
3148                 }, "$dir");
3149
3150         } elsif (-f $projects_list) {
3151                 # read from file(url-encoded):
3152                 # 'git%2Fgit.git Linus+Torvalds'
3153                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3154                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3155                 open my $fd, '<', $projects_list or return;
3156         PROJECT:
3157                 while (my $line = <$fd>) {
3158                         chomp $line;
3159                         my ($path, $owner) = split ' ', $line;
3160                         $path = unescape($path);
3161                         $owner = unescape($owner);
3162                         if (!defined $path) {
3163                                 next;
3164                         }
3165                         # if $filter is rpovided, check if $path begins with $filter
3166                         if ($filter && $path !~ m!^\Q$filter\E/!) {
3167                                 next;
3168                         }
3169                         if (check_export_ok("$projectroot/$path")) {
3170                                 my $pr = {
3171                                         path => $path
3172                                 };
3173                                 if ($owner) {
3174                                         $pr->{'owner'} = to_utf8($owner);
3175                                 }
3176                                 push @list, $pr;
3177                         }
3178                 }
3179                 close $fd;
3180         }
3181         return @list;
3182 }
3183
3184 # written with help of Tree::Trie module (Perl Artistic License, GPL compatible)
3185 # as side effects it sets 'forks' field to list of forks for forked projects
3186 sub filter_forks_from_projects_list {
3187         my $projects = shift;
3188
3189         my %trie; # prefix tree of directories (path components)
3190         # generate trie out of those directories that might contain forks
3191         foreach my $pr (@$projects) {
3192                 my $path = $pr->{'path'};
3193                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3194                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3195                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
3196                 next unless (-d "$projectroot/$path"); # containing directory exists
3197                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
3198
3199                 # add to trie
3200                 my @dirs = split('/', $path);
3201                 # walk the trie, until either runs out of components or out of trie
3202                 my $ref = \%trie;
3203                 while (scalar @dirs &&
3204                        exists($ref->{$dirs[0]})) {
3205                         $ref = $ref->{shift @dirs};
3206                 }
3207                 # create rest of trie structure from rest of components
3208                 foreach my $dir (@dirs) {
3209                         $ref = $ref->{$dir} = {};
3210                 }
3211                 # create end marker, store $pr as a data
3212                 $ref->{''} = $pr if (!exists $ref->{''});
3213         }
3214
3215         # filter out forks, by finding shortest prefix match for paths
3216         my @filtered;
3217  PROJECT:
3218         foreach my $pr (@$projects) {
3219                 # trie lookup
3220                 my $ref = \%trie;
3221         DIR:
3222                 foreach my $dir (split('/', $pr->{'path'})) {
3223                         if (exists $ref->{''}) {
3224                                 # found [shortest] prefix, is a fork - skip it
3225                                 push @{$ref->{''}{'forks'}}, $pr;
3226                                 next PROJECT;
3227                         }
3228                         if (!exists $ref->{$dir}) {
3229                                 # not in trie, cannot have prefix, not a fork
3230                                 push @filtered, $pr;
3231                                 next PROJECT;
3232                         }
3233                         # If the dir is there, we just walk one step down the trie.
3234                         $ref = $ref->{$dir};
3235                 }
3236                 # we ran out of trie
3237                 # (shouldn't happen: it's either no match, or end marker)
3238                 push @filtered, $pr;
3239         }
3240
3241         return @filtered;
3242 }
3243
3244 # note: fill_project_list_info must be run first,
3245 # for 'descr_long' and 'ctags' to be filled
3246 sub search_projects_list {
3247         my ($projlist, %opts) = @_;
3248         my $tagfilter  = $opts{'tagfilter'};
3249         my $search_re = $opts{'search_regexp'};
3250
3251         return @$projlist
3252                 unless ($tagfilter || $search_re);
3253
3254         # searching projects require filling to be run before it;
3255         fill_project_list_info($projlist,
3256                                $tagfilter  ? 'ctags' : (),
3257                                $search_re ? ('path', 'descr') : ());
3258         my @projects;
3259  PROJECT:
3260         foreach my $pr (@$projlist) {
3261
3262                 if ($tagfilter) {
3263                         next unless ref($pr->{'ctags'}) eq 'HASH';
3264                         next unless
3265                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3266                 }
3267
3268                 if ($search_re) {
3269                         next unless
3270                                 $pr->{'path'} =~ /$search_re/ ||
3271                                 $pr->{'descr_long'} =~ /$search_re/;
3272                 }
3273
3274                 push @projects, $pr;
3275         }
3276
3277         return @projects;
3278 }
3279
3280 our $gitweb_project_owner = undef;
3281 sub git_get_project_list_from_file {
3282
3283         return if (defined $gitweb_project_owner);
3284
3285         $gitweb_project_owner = {};
3286         # read from file (url-encoded):
3287         # 'git%2Fgit.git Linus+Torvalds'
3288         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3289         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3290         if (-f $projects_list) {
3291                 open(my $fd, '<', $projects_list);
3292                 while (my $line = <$fd>) {
3293                         chomp $line;
3294                         my ($pr, $ow) = split ' ', $line;
3295                         $pr = unescape($pr);
3296                         $ow = unescape($ow);
3297                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3298                 }
3299                 close $fd;
3300         }
3301 }
3302
3303 sub git_get_project_owner {
3304         my $project = shift;
3305         my $owner;
3306
3307         return undef unless $project;
3308         $git_dir = "$projectroot/$project";
3309
3310         if (!defined $gitweb_project_owner) {
3311                 git_get_project_list_from_file();
3312         }
3313
3314         if (exists $gitweb_project_owner->{$project}) {
3315                 $owner = $gitweb_project_owner->{$project};
3316         }
3317         if (!defined $owner){
3318                 $owner = git_get_project_config('owner');
3319         }
3320         if (!defined $owner) {
3321                 $owner = get_file_owner("$git_dir");
3322         }
3323
3324         return $owner;
3325 }
3326
3327 sub git_get_last_activity {
3328         my ($path) = @_;
3329         my $fd;
3330
3331         $git_dir = "$projectroot/$path";
3332         open($fd, "-|", git_cmd(), 'for-each-ref',
3333              '--format=%(committer)',
3334              '--sort=-committerdate',
3335              '--count=1',
3336              map { "refs/$_" } get_branch_refs ()) or return;
3337         my $most_recent = <$fd>;
3338         close $fd or return;
3339         if (defined $most_recent &&
3340             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3341                 my $timestamp = $1;
3342                 my $age = time - $timestamp;
3343                 return ($age, age_string($age));
3344         }
3345         return (undef, undef);
3346 }
3347
3348 # Implementation note: when a single remote is wanted, we cannot use 'git
3349 # remote show -n' because that command always work (assuming it's a remote URL
3350 # if it's not defined), and we cannot use 'git remote show' because that would
3351 # try to make a network roundtrip. So the only way to find if that particular
3352 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3353 # and when we find what we want.
3354 sub git_get_remotes_list {
3355         my $wanted = shift;
3356         my %remotes = ();
3357
3358         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3359         return unless $fd;
3360         while (my $remote = <$fd>) {
3361                 chomp $remote;
3362                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3363                 next if $wanted and not $remote eq $wanted;
3364                 my ($url, $key) = ($1, $2);
3365
3366                 $remotes{$remote} ||= { 'heads' => () };
3367                 $remotes{$remote}{$key} = $url;
3368         }
3369         close $fd or return;
3370         return wantarray ? %remotes : \%remotes;
3371 }
3372
3373 # Takes a hash of remotes as first parameter and fills it by adding the
3374 # available remote heads for each of the indicated remotes.
3375 sub fill_remote_heads {
3376         my $remotes = shift;
3377         my @heads = map { "remotes/$_" } keys %$remotes;
3378         my @remoteheads = git_get_heads_list(undef, @heads);
3379         foreach my $remote (keys %$remotes) {
3380                 $remotes->{$remote}{'heads'} = [ grep {
3381                         $_->{'name'} =~ s!^$remote/!!
3382                         } @remoteheads ];
3383         }
3384 }
3385
3386 sub git_get_references {
3387         my $type = shift || "";
3388         my %refs;
3389         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3390         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3391         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3392                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3393                 or return;
3394
3395         while (my $line = <$fd>) {
3396                 chomp $line;
3397                 if ($line =~ m!^($oid_regex)\srefs/($type.*)$!) {
3398                         if (defined $refs{$1}) {
3399                                 push @{$refs{$1}}, $2;
3400                         } else {
3401                                 $refs{$1} = [ $2 ];
3402                         }
3403                 }
3404         }
3405         close $fd or return;
3406         return \%refs;
3407 }
3408
3409 sub git_get_rev_name_tags {
3410         my $hash = shift || return undef;
3411
3412         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3413                 or return;
3414         my $name_rev = <$fd>;
3415         close $fd;
3416
3417         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3418                 return $1;
3419         } else {
3420                 # catches also '$hash undefined' output
3421                 return undef;
3422         }
3423 }
3424
3425 ## ----------------------------------------------------------------------
3426 ## parse to hash functions
3427
3428 sub parse_date {
3429         my $epoch = shift;
3430         my $tz = shift || "-0000";
3431
3432         my %date;
3433         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3434         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3435         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3436         $date{'hour'} = $hour;
3437         $date{'minute'} = $min;
3438         $date{'mday'} = $mday;
3439         $date{'day'} = $days[$wday];
3440         $date{'month'} = $months[$mon];
3441         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3442                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3443         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3444                              $mday, $months[$mon], $hour ,$min;
3445         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3446                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3447
3448         my ($tz_sign, $tz_hour, $tz_min) =
3449                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3450         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3451         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3452         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3453         $date{'hour_local'} = $hour;
3454         $date{'minute_local'} = $min;
3455         $date{'tz_local'} = $tz;
3456         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3457                                   1900+$year, $mon+1, $mday,
3458                                   $hour, $min, $sec, $tz);
3459         return %date;
3460 }
3461
3462 sub hide_mailaddrs_if_private {
3463         my $line = shift;
3464         return $line unless gitweb_check_feature('email-privacy');
3465         $line =~ s/<[^@>]+@[^>]+>/<redacted>/g;
3466         return $line;
3467 }
3468
3469 sub parse_tag {
3470         my $tag_id = shift;
3471         my %tag;
3472         my @comment;
3473
3474         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3475         $tag{'id'} = $tag_id;
3476         while (my $line = <$fd>) {
3477                 chomp $line;
3478                 if ($line =~ m/^object ($oid_regex)$/) {
3479                         $tag{'object'} = $1;
3480                 } elsif ($line =~ m/^type (.+)$/) {
3481                         $tag{'type'} = $1;
3482                 } elsif ($line =~ m/^tag (.+)$/) {
3483                         $tag{'name'} = $1;
3484                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3485                         $tag{'author'} = hide_mailaddrs_if_private($1);
3486                         $tag{'author_epoch'} = $2;
3487                         $tag{'author_tz'} = $3;
3488                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3489                                 $tag{'author_name'}  = $1;
3490                                 $tag{'author_email'} = $2;
3491                         } else {
3492                                 $tag{'author_name'} = $tag{'author'};
3493                         }
3494                 } elsif ($line =~ m/--BEGIN/) {
3495                         push @comment, $line;
3496                         last;
3497                 } elsif ($line eq "") {
3498                         last;
3499                 }
3500         }
3501         push @comment, <$fd>;
3502         $tag{'comment'} = \@comment;
3503         close $fd or return;
3504         if (!defined $tag{'name'}) {
3505                 return
3506         };
3507         return %tag
3508 }
3509
3510 sub parse_commit_text {
3511         my ($commit_text, $withparents) = @_;
3512         my @commit_lines = split '\n', $commit_text;
3513         my %co;
3514
3515         pop @commit_lines; # Remove '\0'
3516
3517         if (! @commit_lines) {
3518                 return;
3519         }
3520
3521         my $header = shift @commit_lines;
3522         if ($header !~ m/^$oid_regex/) {
3523                 return;
3524         }
3525         ($co{'id'}, my @parents) = split ' ', $header;
3526         while (my $line = shift @commit_lines) {
3527                 last if $line eq "\n";
3528                 if ($line =~ m/^tree ($oid_regex)$/) {
3529                         $co{'tree'} = $1;
3530                 } elsif ((!defined $withparents) && ($line =~ m/^parent ($oid_regex)$/)) {
3531                         push @parents, $1;
3532                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3533                         $co{'author'} = hide_mailaddrs_if_private(to_utf8($1));
3534                         $co{'author_epoch'} = $2;
3535                         $co{'author_tz'} = $3;
3536                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3537                                 $co{'author_name'}  = $1;
3538                                 $co{'author_email'} = $2;
3539                         } else {
3540                                 $co{'author_name'} = $co{'author'};
3541                         }
3542                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3543                         $co{'committer'} = hide_mailaddrs_if_private(to_utf8($1));
3544                         $co{'committer_epoch'} = $2;
3545                         $co{'committer_tz'} = $3;
3546                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3547                                 $co{'committer_name'}  = $1;
3548                                 $co{'committer_email'} = $2;
3549                         } else {
3550                                 $co{'committer_name'} = $co{'committer'};
3551                         }
3552                 }
3553         }
3554         if (!defined $co{'tree'}) {
3555                 return;
3556         };
3557         $co{'parents'} = \@parents;
3558         $co{'parent'} = $parents[0];
3559
3560         foreach my $title (@commit_lines) {
3561                 $title =~ s/^    //;
3562                 if ($title ne "") {
3563                         $co{'title'} = chop_str($title, 80, 5);
3564                         # remove leading stuff of merges to make the interesting part visible
3565                         if (length($title) > 50) {
3566                                 $title =~ s/^Automatic //;
3567                                 $title =~ s/^merge (of|with) /Merge ... /i;
3568                                 if (length($title) > 50) {
3569                                         $title =~ s/(http|rsync):\/\///;
3570                                 }
3571                                 if (length($title) > 50) {
3572                                         $title =~ s/(master|www|rsync)\.//;
3573                                 }
3574                                 if (length($title) > 50) {
3575                                         $title =~ s/kernel.org:?//;
3576                                 }
3577                                 if (length($title) > 50) {
3578                                         $title =~ s/\/pub\/scm//;
3579                                 }
3580                         }
3581                         $co{'title_short'} = chop_str($title, 50, 5);
3582                         last;
3583                 }
3584         }
3585         if (! defined $co{'title'} || $co{'title'} eq "") {
3586                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3587         }
3588         # remove added spaces, redact e-mail addresses if applicable.
3589         foreach my $line (@commit_lines) {
3590                 $line =~ s/^    //;
3591                 $line = hide_mailaddrs_if_private($line);
3592         }
3593         $co{'comment'} = \@commit_lines;
3594
3595         my $age = time - $co{'committer_epoch'};
3596         $co{'age'} = $age;
3597         $co{'age_string'} = age_string($age);
3598         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3599         if ($age > 60*60*24*7*2) {
3600                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3601                 $co{'age_string_age'} = $co{'age_string'};
3602         } else {
3603                 $co{'age_string_date'} = $co{'age_string'};
3604                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3605         }
3606         return %co;
3607 }
3608
3609 sub parse_commit {
3610         my ($commit_id) = @_;
3611         my %co;
3612
3613         local $/ = "\0";
3614
3615         open my $fd, "-|", git_cmd(), "rev-list",
3616                 "--parents",
3617                 "--header",
3618                 "--max-count=1",
3619                 $commit_id,
3620                 "--",
3621                 or die_error(500, "Open git-rev-list failed");
3622         %co = parse_commit_text(<$fd>, 1);
3623         close $fd;
3624
3625         return %co;
3626 }
3627
3628 sub parse_commits {
3629         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3630         my @cos;
3631
3632         $maxcount ||= 1;
3633         $skip ||= 0;
3634
3635         local $/ = "\0";
3636
3637         open my $fd, "-|", git_cmd(), "rev-list",
3638                 "--header",
3639                 @args,
3640                 ("--max-count=" . $maxcount),
3641                 ("--skip=" . $skip),
3642                 @extra_options,
3643                 $commit_id,
3644                 "--",
3645                 ($filename ? ($filename) : ())
3646                 or die_error(500, "Open git-rev-list failed");
3647         while (my $line = <$fd>) {
3648                 my %co = parse_commit_text($line);
3649                 push @cos, \%co;
3650         }
3651         close $fd;
3652
3653         return wantarray ? @cos : \@cos;
3654 }
3655
3656 # parse line of git-diff-tree "raw" output
3657 sub parse_difftree_raw_line {
3658         my $line = shift;
3659         my %res;
3660
3661         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3662         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3663         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ($oid_regex) ($oid_regex) (.)([0-9]{0,3})\t(.*)$/) {
3664                 $res{'from_mode'} = $1;
3665                 $res{'to_mode'} = $2;
3666                 $res{'from_id'} = $3;
3667                 $res{'to_id'} = $4;
3668                 $res{'status'} = $5;
3669                 $res{'similarity'} = $6;
3670                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3671                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3672                 } else {
3673                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3674                 }
3675         }
3676         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3677         # combined diff (for merge commit)
3678         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:$oid_regex )+)([a-zA-Z]+)\t(.*)$//) {
3679                 $res{'nparents'}  = length($1);
3680                 $res{'from_mode'} = [ split(' ', $2) ];
3681                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3682                 $res{'from_id'} = [ split(' ', $3) ];
3683                 $res{'to_id'} = pop @{$res{'from_id'}};
3684                 $res{'status'} = [ split('', $4) ];
3685                 $res{'to_file'} = unquote($5);
3686         }
3687         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3688         elsif ($line =~ m/^($oid_regex)$/) {
3689                 $res{'commit'} = $1;
3690         }
3691
3692         return wantarray ? %res : \%res;
3693 }
3694
3695 # wrapper: return parsed line of git-diff-tree "raw" output
3696 # (the argument might be raw line, or parsed info)
3697 sub parsed_difftree_line {
3698         my $line_or_ref = shift;
3699
3700         if (ref($line_or_ref) eq "HASH") {
3701                 # pre-parsed (or generated by hand)
3702                 return $line_or_ref;
3703         } else {
3704                 return parse_difftree_raw_line($line_or_ref);
3705         }
3706 }
3707
3708 # parse line of git-ls-tree output
3709 sub parse_ls_tree_line {
3710         my $line = shift;
3711         my %opts = @_;
3712         my %res;
3713
3714         if ($opts{'-l'}) {
3715                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3716                 $line =~ m/^([0-9]+) (.+) ($oid_regex) +(-|[0-9]+)\t(.+)$/s;
3717
3718                 $res{'mode'} = $1;
3719                 $res{'type'} = $2;
3720                 $res{'hash'} = $3;
3721                 $res{'size'} = $4;
3722                 if ($opts{'-z'}) {
3723                         $res{'name'} = $5;
3724                 } else {
3725                         $res{'name'} = unquote($5);
3726                 }
3727         } else {
3728                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3729                 $line =~ m/^([0-9]+) (.+) ($oid_regex)\t(.+)$/s;
3730
3731                 $res{'mode'} = $1;
3732                 $res{'type'} = $2;
3733                 $res{'hash'} = $3;
3734                 if ($opts{'-z'}) {
3735                         $res{'name'} = $4;
3736                 } else {
3737                         $res{'name'} = unquote($4);
3738                 }
3739         }
3740
3741         return wantarray ? %res : \%res;
3742 }
3743
3744 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3745 sub parse_from_to_diffinfo {
3746         my ($diffinfo, $from, $to, @parents) = @_;
3747
3748         if ($diffinfo->{'nparents'}) {
3749                 # combined diff
3750                 $from->{'file'} = [];
3751                 $from->{'href'} = [];
3752                 fill_from_file_info($diffinfo, @parents)
3753                         unless exists $diffinfo->{'from_file'};
3754                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3755                         $from->{'file'}[$i] =
3756                                 defined $diffinfo->{'from_file'}[$i] ?
3757                                         $diffinfo->{'from_file'}[$i] :
3758                                         $diffinfo->{'to_file'};
3759                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3760                                 $from->{'href'}[$i] = href(action=>"blob",
3761                                                            hash_base=>$parents[$i],
3762                                                            hash=>$diffinfo->{'from_id'}[$i],
3763                                                            file_name=>$from->{'file'}[$i]);
3764                         } else {
3765                                 $from->{'href'}[$i] = undef;
3766                         }
3767                 }
3768         } else {
3769                 # ordinary (not combined) diff
3770                 $from->{'file'} = $diffinfo->{'from_file'};
3771                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3772                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3773                                                hash=>$diffinfo->{'from_id'},
3774                                                file_name=>$from->{'file'});
3775                 } else {
3776                         delete $from->{'href'};
3777                 }
3778         }
3779
3780         $to->{'file'} = $diffinfo->{'to_file'};
3781         if (!is_deleted($diffinfo)) { # file exists in result
3782                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3783                                      hash=>$diffinfo->{'to_id'},
3784                                      file_name=>$to->{'file'});
3785         } else {
3786                 delete $to->{'href'};
3787         }
3788 }
3789
3790 ## ......................................................................
3791 ## parse to array of hashes functions
3792
3793 sub git_get_heads_list {
3794         my ($limit, @classes) = @_;
3795         @classes = get_branch_refs() unless @classes;
3796         my @patterns = map { "refs/$_" } @classes;
3797         my @headslist;
3798
3799         open my $fd, '-|', git_cmd(), 'for-each-ref',
3800                 ($limit ? '--count='.($limit+1) : ()),
3801                 '--sort=-HEAD', '--sort=-committerdate',
3802                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3803                 @patterns
3804                 or return;
3805         while (my $line = <$fd>) {
3806                 my %ref_item;
3807
3808                 chomp $line;
3809                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3810                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3811                 my ($committer, $epoch, $tz) =
3812                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3813                 $ref_item{'fullname'}  = $name;
3814                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
3815                 $name =~ s!^refs/($strip_refs|remotes)/!!;
3816                 $ref_item{'name'} = $name;
3817                 # for refs neither in 'heads' nor 'remotes' we want to
3818                 # show their ref dir
3819                 my $ref_dir = (defined $1) ? $1 : '';
3820                 if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
3821                     $ref_item{'name'} .= ' (' . $ref_dir . ')';
3822                 }
3823
3824                 $ref_item{'id'}    = $hash;
3825                 $ref_item{'title'} = $title || '(no commit message)';
3826                 $ref_item{'epoch'} = $epoch;
3827                 if ($epoch) {
3828                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3829                 } else {
3830                         $ref_item{'age'} = "unknown";
3831                 }
3832
3833                 push @headslist, \%ref_item;
3834         }
3835         close $fd;
3836
3837         return wantarray ? @headslist : \@headslist;
3838 }
3839
3840 sub git_get_tags_list {
3841         my $limit = shift;
3842         my @tagslist;
3843
3844         open my $fd, '-|', git_cmd(), 'for-each-ref',
3845                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3846                 '--format=%(objectname) %(objecttype) %(refname) '.
3847                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3848                 'refs/tags'
3849                 or return;
3850         while (my $line = <$fd>) {
3851                 my %ref_item;
3852
3853                 chomp $line;
3854                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3855                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3856                 my ($creator, $epoch, $tz) =
3857                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3858                 $ref_item{'fullname'} = $name;
3859                 $name =~ s!^refs/tags/!!;
3860
3861                 $ref_item{'type'} = $type;
3862                 $ref_item{'id'} = $id;
3863                 $ref_item{'name'} = $name;
3864                 if ($type eq "tag") {
3865                         $ref_item{'subject'} = $title;
3866                         $ref_item{'reftype'} = $reftype;
3867                         $ref_item{'refid'}   = $refid;
3868                 } else {
3869                         $ref_item{'reftype'} = $type;
3870                         $ref_item{'refid'}   = $id;
3871                 }
3872
3873                 if ($type eq "tag" || $type eq "commit") {
3874                         $ref_item{'epoch'} = $epoch;
3875                         if ($epoch) {
3876                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3877                         } else {
3878                                 $ref_item{'age'} = "unknown";
3879                         }
3880                 }
3881
3882                 push @tagslist, \%ref_item;
3883         }
3884         close $fd;
3885
3886         return wantarray ? @tagslist : \@tagslist;
3887 }
3888
3889 ## ----------------------------------------------------------------------
3890 ## filesystem-related functions
3891
3892 sub get_file_owner {
3893         my $path = shift;
3894
3895         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3896         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3897         if (!defined $gcos) {
3898                 return undef;
3899         }
3900         my $owner = $gcos;
3901         $owner =~ s/[,;].*$//;
3902         return to_utf8($owner);
3903 }
3904
3905 # assume that file exists
3906 sub insert_file {
3907         my $filename = shift;
3908
3909         open my $fd, '<', $filename;
3910         print map { to_utf8($_) } <$fd>;
3911         close $fd;
3912 }
3913
3914 ## ......................................................................
3915 ## mimetype related functions
3916
3917 sub mimetype_guess_file {
3918         my $filename = shift;
3919         my $mimemap = shift;
3920         -r $mimemap or return undef;
3921
3922         my %mimemap;
3923         open(my $mh, '<', $mimemap) or return undef;
3924         while (<$mh>) {
3925                 next if m/^#/; # skip comments
3926                 my ($mimetype, @exts) = split(/\s+/);
3927                 foreach my $ext (@exts) {
3928                         $mimemap{$ext} = $mimetype;
3929                 }
3930         }
3931         close($mh);
3932
3933         $filename =~ /\.([^.]*)$/;
3934         return $mimemap{$1};
3935 }
3936
3937 sub mimetype_guess {
3938         my $filename = shift;
3939         my $mime;
3940         $filename =~ /\./ or return undef;
3941
3942         if ($mimetypes_file) {
3943                 my $file = $mimetypes_file;
3944                 if ($file !~ m!^/!) { # if it is relative path
3945                         # it is relative to project
3946                         $file = "$projectroot/$project/$file";
3947                 }
3948                 $mime = mimetype_guess_file($filename, $file);
3949         }
3950         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3951         return $mime;
3952 }
3953
3954 sub blob_mimetype {
3955         my $fd = shift;
3956         my $filename = shift;
3957
3958         if ($filename) {
3959                 my $mime = mimetype_guess($filename);
3960                 $mime and return $mime;
3961         }
3962
3963         # just in case
3964         return $default_blob_plain_mimetype unless $fd;
3965
3966         if (-T $fd) {
3967                 return 'text/plain';
3968         } elsif (! $filename) {
3969                 return 'application/octet-stream';
3970         } elsif ($filename =~ m/\.png$/i) {
3971                 return 'image/png';
3972         } elsif ($filename =~ m/\.gif$/i) {
3973                 return 'image/gif';
3974         } elsif ($filename =~ m/\.jpe?g$/i) {
3975                 return 'image/jpeg';
3976         } else {
3977                 return 'application/octet-stream';
3978         }
3979 }
3980
3981 sub blob_contenttype {
3982         my ($fd, $file_name, $type) = @_;
3983
3984         $type ||= blob_mimetype($fd, $file_name);
3985         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3986                 $type .= "; charset=$default_text_plain_charset";
3987         }
3988
3989         return $type;
3990 }
3991
3992 # guess file syntax for syntax highlighting; return undef if no highlighting
3993 # the name of syntax can (in the future) depend on syntax highlighter used
3994 sub guess_file_syntax {
3995         my ($highlight, $file_name) = @_;
3996         return undef unless ($highlight && defined $file_name);
3997         my $basename = basename($file_name, '.in');
3998         return $highlight_basename{$basename}
3999                 if exists $highlight_basename{$basename};
4000
4001         $basename =~ /\.([^.]*)$/;
4002         my $ext = $1 or return undef;
4003         return $highlight_ext{$ext}
4004                 if exists $highlight_ext{$ext};
4005
4006         return undef;
4007 }
4008
4009 # run highlighter and return FD of its output,
4010 # or return original FD if no highlighting
4011 sub run_highlighter {
4012         my ($fd, $highlight, $syntax) = @_;
4013         return $fd unless ($highlight);
4014
4015         close $fd;
4016         my $syntax_arg = (defined $syntax) ? "--syntax $syntax" : "--force";
4017         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
4018                   quote_command($^X, '-CO', '-MEncode=decode,FB_DEFAULT', '-pse',
4019                     '$_ = decode($fe, $_, FB_DEFAULT) if !utf8::decode($_);',
4020                     '--', "-fe=$fallback_encoding")." | ".
4021                   quote_command($highlight_bin).
4022                   " --replace-tabs=8 --fragment $syntax_arg |"
4023                 or die_error(500, "Couldn't open file or run syntax highlighter");
4024         return $fd;
4025 }
4026
4027 ## ======================================================================
4028 ## functions printing HTML: header, footer, error page
4029
4030 sub get_page_title {
4031         my $title = to_utf8($site_name);
4032
4033         unless (defined $project) {
4034                 if (defined $project_filter) {
4035                         $title .= " - projects in '" . esc_path($project_filter) . "'";
4036                 }
4037                 return $title;
4038         }
4039         $title .= " - " . to_utf8($project);
4040
4041         return $title unless (defined $action);
4042         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
4043
4044         return $title unless (defined $file_name);
4045         $title .= " - " . esc_path($file_name);
4046         if ($action eq "tree" && $file_name !~ m|/$|) {
4047                 $title .= "/";
4048         }
4049
4050         return $title;
4051 }
4052
4053 sub get_content_type_html {
4054         # require explicit support from the UA if we are to send the page as
4055         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
4056         # we have to do this because MSIE sometimes globs '*/*', pretending to
4057         # support xhtml+xml but choking when it gets what it asked for.
4058         if (defined $cgi->http('HTTP_ACCEPT') &&
4059             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
4060             $cgi->Accept('application/xhtml+xml') != 0) {
4061                 return 'application/xhtml+xml';
4062         } else {
4063                 return 'text/html';
4064         }
4065 }
4066
4067 sub print_feed_meta {
4068         if (defined $project) {
4069                 my %href_params = get_feed_info();
4070                 if (!exists $href_params{'-title'}) {
4071                         $href_params{'-title'} = 'log';
4072                 }
4073
4074                 foreach my $format (qw(RSS Atom)) {
4075                         my $type = lc($format);
4076                         my %link_attr = (
4077                                 '-rel' => 'alternate',
4078                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
4079                                 '-type' => "application/$type+xml"
4080                         );
4081
4082                         $href_params{'extra_options'} = undef;
4083                         $href_params{'action'} = $type;
4084                         $link_attr{'-href'} = esc_attr(href(%href_params));
4085                         print "<link ".
4086                               "rel=\"$link_attr{'-rel'}\" ".
4087                               "title=\"$link_attr{'-title'}\" ".
4088                               "href=\"$link_attr{'-href'}\" ".
4089                               "type=\"$link_attr{'-type'}\" ".
4090                               "/>\n";
4091
4092                         $href_params{'extra_options'} = '--no-merges';
4093                         $link_attr{'-href'} = esc_attr(href(%href_params));
4094                         $link_attr{'-title'} .= ' (no merges)';
4095                         print "<link ".
4096                               "rel=\"$link_attr{'-rel'}\" ".
4097                               "title=\"$link_attr{'-title'}\" ".
4098                               "href=\"$link_attr{'-href'}\" ".
4099                               "type=\"$link_attr{'-type'}\" ".
4100                               "/>\n";
4101                 }
4102
4103         } else {
4104                 printf('<link rel="alternate" title="%s projects list" '.
4105                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
4106                        esc_attr($site_name),
4107                        esc_attr(href(project=>undef, action=>"project_index")));
4108                 printf('<link rel="alternate" title="%s projects feeds" '.
4109                        'href="%s" type="text/x-opml" />'."\n",
4110                        esc_attr($site_name),
4111                        esc_attr(href(project=>undef, action=>"opml")));
4112         }
4113 }
4114
4115 sub print_header_links {
4116         my $status = shift;
4117
4118         # print out each stylesheet that exist, providing backwards capability
4119         # for those people who defined $stylesheet in a config file
4120         if (defined $stylesheet) {
4121                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4122         } else {
4123                 foreach my $stylesheet (@stylesheets) {
4124                         next unless $stylesheet;
4125                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4126                 }
4127         }
4128         print_feed_meta()
4129                 if ($status eq '200 OK');
4130         if (defined $favicon) {
4131                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
4132         }
4133 }
4134
4135 sub print_nav_breadcrumbs_path {
4136         my $dirprefix = undef;
4137         while (my $part = shift) {
4138                 $dirprefix .= "/" if defined $dirprefix;
4139                 $dirprefix .= $part;
4140                 print $cgi->a({-href => href(project => undef,
4141                                              project_filter => $dirprefix,
4142                                              action => "project_list")},
4143                               esc_html($part)) . " / ";
4144         }
4145 }
4146
4147 sub print_nav_breadcrumbs {
4148         my %opts = @_;
4149
4150         for my $crumb (@extra_breadcrumbs, [ $home_link_str => $home_link ]) {
4151                 print $cgi->a({-href => esc_url($crumb->[1])}, $crumb->[0]) . " / ";
4152         }
4153         if (defined $project) {
4154                 my @dirname = split '/', $project;
4155                 my $projectbasename = pop @dirname;
4156                 print_nav_breadcrumbs_path(@dirname);
4157                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
4158                 if (defined $action) {
4159                         my $action_print = $action ;
4160                         if (defined $opts{-action_extra}) {
4161                                 $action_print = $cgi->a({-href => href(action=>$action)},
4162                                         $action);
4163                         }
4164                         print " / $action_print";
4165                 }
4166                 if (defined $opts{-action_extra}) {
4167                         print " / $opts{-action_extra}";
4168                 }
4169                 print "\n";
4170         } elsif (defined $project_filter) {
4171                 print_nav_breadcrumbs_path(split '/', $project_filter);
4172         }
4173 }
4174
4175 sub print_search_form {
4176         if (!defined $searchtext) {
4177                 $searchtext = "";
4178         }
4179         my $search_hash;
4180         if (defined $hash_base) {
4181                 $search_hash = $hash_base;
4182         } elsif (defined $hash) {
4183                 $search_hash = $hash;
4184         } else {
4185                 $search_hash = "HEAD";
4186         }
4187         my $action = $my_uri;
4188         my $use_pathinfo = gitweb_check_feature('pathinfo');
4189         if ($use_pathinfo) {
4190                 $action .= "/".esc_url($project);
4191         }
4192         print $cgi->start_form(-method => "get", -action => $action) .
4193               "<div class=\"search\">\n" .
4194               (!$use_pathinfo &&
4195               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4196               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4197               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4198               $cgi->popup_menu(-name => 'st', -default => 'commit',
4199                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4200               " " . $cgi->a({-href => href(action=>"search_help"),
4201                              -title => "search help" }, "?") . " search:\n",
4202               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4203               "<span title=\"Extended regular expression\">" .
4204               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4205                              -checked => $search_use_regexp) .
4206               "</span>" .
4207               "</div>" .
4208               $cgi->end_form() . "\n";
4209 }
4210
4211 sub git_header_html {
4212         my $status = shift || "200 OK";
4213         my $expires = shift;
4214         my %opts = @_;
4215
4216         my $title = get_page_title();
4217         print $cgi->header(-type=>get_content_type_html(), -charset => 'utf-8',
4218                            -status=> $status, -expires => $expires)
4219                 unless ($opts{'-no_http_header'});
4220         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4221         print <<EOF;
4222 <?xml version="1.0" encoding="utf-8"?>
4223 <!DOCTYPE html [
4224         <!ENTITY nbsp "&#xA0;">
4225         <!ENTITY sdot "&#x22C5;">
4226 ]>
4227 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4228 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4229 <!-- git core binaries version $git_version -->
4230 <head>
4231 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4232 <meta name="robots" content="index, nofollow"/>
4233 <title>$title</title>
4234 EOF
4235         # the stylesheet, favicon etc urls won't work correctly with path_info
4236         # unless we set the appropriate base URL
4237         if ($ENV{'PATH_INFO'}) {
4238                 print "<base href=\"".esc_url($base_url)."\" />\n";
4239         }
4240         print_header_links($status);
4241
4242         if (defined $site_html_head_string) {
4243                 print to_utf8($site_html_head_string);
4244         }
4245
4246         print "</head>\n" .
4247               "<body>\n";
4248
4249         if (defined $site_header && -f $site_header) {
4250                 insert_file($site_header);
4251         }
4252
4253         print "<div class=\"page_header\">\n";
4254         if (defined $logo) {
4255                 print $cgi->a({-href => esc_url($logo_url),
4256                                -title => $logo_label},
4257                               $cgi->img({-src => esc_url($logo),
4258                                          -width => 72, -height => 27,
4259                                          -alt => "git",
4260                                          -class => "logo"}));
4261         }
4262         print_nav_breadcrumbs(%opts);
4263         print "</div>\n";
4264
4265         my $have_search = gitweb_check_feature('search');
4266         if (defined $project && $have_search) {
4267                 print_search_form();
4268         }
4269 }
4270
4271 sub git_footer_html {
4272         my $feed_class = 'rss_logo';
4273
4274         print "<div class=\"page_footer\">\n";
4275         if (defined $project) {
4276                 my $descr = git_get_project_description($project);
4277                 if (defined $descr) {
4278                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4279                 }
4280
4281                 my %href_params = get_feed_info();
4282                 if (!%href_params) {
4283                         $feed_class .= ' generic';
4284                 }
4285                 $href_params{'-title'} ||= 'log';
4286
4287                 foreach my $format (qw(RSS Atom)) {
4288                         $href_params{'action'} = lc($format);
4289                         print $cgi->a({-href => href(%href_params),
4290                                       -title => "$href_params{'-title'} $format feed",
4291                                       -class => $feed_class}, $format)."\n";
4292                 }
4293
4294         } else {
4295                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4296                                              project_filter => $project_filter),
4297                               -class => $feed_class}, "OPML") . " ";
4298                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4299                                              project_filter => $project_filter),
4300                               -class => $feed_class}, "TXT") . "\n";
4301         }
4302         print "</div>\n"; # class="page_footer"
4303
4304         if (defined $t0 && gitweb_check_feature('timed')) {
4305                 print "<div id=\"generating_info\">\n";
4306                 print 'This page took '.
4307                       '<span id="generating_time" class="time_span">'.
4308                       tv_interval($t0, [ gettimeofday() ]).
4309                       ' seconds </span>'.
4310                       ' and '.
4311                       '<span id="generating_cmd">'.
4312                       $number_of_git_cmds.
4313                       '</span> git commands '.
4314                       " to generate.\n";
4315                 print "</div>\n"; # class="page_footer"
4316         }
4317
4318         if (defined $site_footer && -f $site_footer) {
4319                 insert_file($site_footer);
4320         }
4321
4322         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4323         if (defined $action &&
4324             $action eq 'blame_incremental') {
4325                 print qq!<script type="text/javascript">\n!.
4326                       qq!startBlame("!. esc_attr(href(action=>"blame_data", -replay=>1)) .qq!",\n!.
4327                       qq!           "!. esc_attr(href()) .qq!");\n!.
4328                       qq!</script>\n!;
4329         } else {
4330                 my ($jstimezone, $tz_cookie, $datetime_class) =
4331                         gitweb_get_feature('javascript-timezone');
4332
4333                 print qq!<script type="text/javascript">\n!.
4334                       qq!window.onload = function () {\n!;
4335                 if (gitweb_check_feature('javascript-actions')) {
4336                         print qq!       fixLinks();\n!;
4337                 }
4338                 if ($jstimezone && $tz_cookie && $datetime_class) {
4339                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4340                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4341                 }
4342                 print qq!};\n!.
4343                       qq!</script>\n!;
4344         }
4345
4346         print "</body>\n" .
4347               "</html>";
4348 }
4349
4350 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4351 # Example: die_error(404, 'Hash not found')
4352 # By convention, use the following status codes (as defined in RFC 2616):
4353 # 400: Invalid or missing CGI parameters, or
4354 #      requested object exists but has wrong type.
4355 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4356 #      this server or project.
4357 # 404: Requested object/revision/project doesn't exist.
4358 # 500: The server isn't configured properly, or
4359 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4360 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4361 # 503: The server is currently unavailable (because it is overloaded,
4362 #      or down for maintenance).  Generally, this is a temporary state.
4363 sub die_error {
4364         my $status = shift || 500;
4365         my $error = esc_html(shift) || "Internal Server Error";
4366         my $extra = shift;
4367         my %opts = @_;
4368
4369         my %http_responses = (
4370                 400 => '400 Bad Request',
4371                 403 => '403 Forbidden',
4372                 404 => '404 Not Found',
4373                 500 => '500 Internal Server Error',
4374                 503 => '503 Service Unavailable',
4375         );
4376         git_header_html($http_responses{$status}, undef, %opts);
4377         print <<EOF;
4378 <div class="page_body">
4379 <br /><br />
4380 $status - $error
4381 <br />
4382 EOF
4383         if (defined $extra) {
4384                 print "<hr />\n" .
4385                       "$extra\n";
4386         }
4387         print "</div>\n";
4388
4389         git_footer_html();
4390         goto DONE_GITWEB
4391                 unless ($opts{'-error_handler'});
4392 }
4393
4394 ## ----------------------------------------------------------------------
4395 ## functions printing or outputting HTML: navigation
4396
4397 sub git_print_page_nav {
4398         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4399         $extra = '' if !defined $extra; # pager or formats
4400
4401         my @navs = qw(summary shortlog log commit commitdiff tree);
4402         if ($suppress) {
4403                 @navs = grep { $_ ne $suppress } @navs;
4404         }
4405
4406         my %arg = map { $_ => {action=>$_} } @navs;
4407         if (defined $head) {
4408                 for (qw(commit commitdiff)) {
4409                         $arg{$_}{'hash'} = $head;
4410                 }
4411                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4412                         for (qw(shortlog log)) {
4413                                 $arg{$_}{'hash'} = $head;
4414                         }
4415                 }
4416         }
4417
4418         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4419         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4420
4421         my @actions = gitweb_get_feature('actions');
4422         my %repl = (
4423                 '%' => '%',
4424                 'n' => $project,         # project name
4425                 'f' => $git_dir,         # project path within filesystem
4426                 'h' => $treehead || '',  # current hash ('h' parameter)
4427                 'b' => $treebase || '',  # hash base ('hb' parameter)
4428         );
4429         while (@actions) {
4430                 my ($label, $link, $pos) = splice(@actions,0,3);
4431                 # insert
4432                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4433                 # munch munch
4434                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4435                 $arg{$label}{'_href'} = $link;
4436         }
4437
4438         print "<div class=\"page_nav\">\n" .
4439                 (join " | ",
4440                  map { $_ eq $current ?
4441                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4442                  } @navs);
4443         print "<br/>\n$extra<br/>\n" .
4444               "</div>\n";
4445 }
4446
4447 # returns a submenu for the navigation of the refs views (tags, heads,
4448 # remotes) with the current view disabled and the remotes view only
4449 # available if the feature is enabled
4450 sub format_ref_views {
4451         my ($current) = @_;
4452         my @ref_views = qw{tags heads};
4453         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4454         return join " | ", map {
4455                 $_ eq $current ? $_ :
4456                 $cgi->a({-href => href(action=>$_)}, $_)
4457         } @ref_views
4458 }
4459
4460 sub format_paging_nav {
4461         my ($action, $page, $has_next_link) = @_;
4462         my $paging_nav;
4463
4464
4465         if ($page > 0) {
4466                 $paging_nav .=
4467                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4468                         " &sdot; " .
4469                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4470                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4471         } else {
4472                 $paging_nav .= "first &sdot; prev";
4473         }
4474
4475         if ($has_next_link) {
4476                 $paging_nav .= " &sdot; " .
4477                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4478                                  -accesskey => "n", -title => "Alt-n"}, "next");
4479         } else {
4480                 $paging_nav .= " &sdot; next";
4481         }
4482
4483         return $paging_nav;
4484 }
4485
4486 ## ......................................................................
4487 ## functions printing or outputting HTML: div
4488
4489 sub git_print_header_div {
4490         my ($action, $title, $hash, $hash_base) = @_;
4491         my %args = ();
4492
4493         $args{'action'} = $action;
4494         $args{'hash'} = $hash if $hash;
4495         $args{'hash_base'} = $hash_base if $hash_base;
4496
4497         print "<div class=\"header\">\n" .
4498               $cgi->a({-href => href(%args), -class => "title"},
4499               $title ? $title : $action) .
4500               "\n</div>\n";
4501 }
4502
4503 sub format_repo_url {
4504         my ($name, $url) = @_;
4505         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4506 }
4507
4508 # Group output by placing it in a DIV element and adding a header.
4509 # Options for start_div() can be provided by passing a hash reference as the
4510 # first parameter to the function.
4511 # Options to git_print_header_div() can be provided by passing an array
4512 # reference. This must follow the options to start_div if they are present.
4513 # The content can be a scalar, which is output as-is, a scalar reference, which
4514 # is output after html escaping, an IO handle passed either as *handle or
4515 # *handle{IO}, or a function reference. In the latter case all following
4516 # parameters will be taken as argument to the content function call.
4517 sub git_print_section {
4518         my ($div_args, $header_args, $content);
4519         my $arg = shift;
4520         if (ref($arg) eq 'HASH') {
4521                 $div_args = $arg;
4522                 $arg = shift;
4523         }
4524         if (ref($arg) eq 'ARRAY') {
4525                 $header_args = $arg;
4526                 $arg = shift;
4527         }
4528         $content = $arg;
4529
4530         print $cgi->start_div($div_args);
4531         git_print_header_div(@$header_args);
4532
4533         if (ref($content) eq 'CODE') {
4534                 $content->(@_);
4535         } elsif (ref($content) eq 'SCALAR') {
4536                 print esc_html($$content);
4537         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4538                 print <$content>;
4539         } elsif (!ref($content) && defined($content)) {
4540                 print $content;
4541         }
4542
4543         print $cgi->end_div;
4544 }
4545
4546 sub format_timestamp_html {
4547         my $date = shift;
4548         my $strtime = $date->{'rfc2822'};
4549
4550         my (undef, undef, $datetime_class) =
4551                 gitweb_get_feature('javascript-timezone');
4552         if ($datetime_class) {
4553                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4554         }
4555
4556         my $localtime_format = '(%02d:%02d %s)';
4557         if ($date->{'hour_local'} < 6) {
4558                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4559         }
4560         $strtime .= ' ' .
4561                     sprintf($localtime_format,
4562                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4563
4564         return $strtime;
4565 }
4566
4567 # Outputs the author name and date in long form
4568 sub git_print_authorship {
4569         my $co = shift;
4570         my %opts = @_;
4571         my $tag = $opts{-tag} || 'div';
4572         my $author = $co->{'author_name'};
4573
4574         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4575         print "<$tag class=\"author_date\">" .
4576               format_search_author($author, "author", esc_html($author)) .
4577               " [".format_timestamp_html(\%ad)."]".
4578               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4579               "</$tag>\n";
4580 }
4581
4582 # Outputs table rows containing the full author or committer information,
4583 # in the format expected for 'commit' view (& similar).
4584 # Parameters are a commit hash reference, followed by the list of people
4585 # to output information for. If the list is empty it defaults to both
4586 # author and committer.
4587 sub git_print_authorship_rows {
4588         my $co = shift;
4589         # too bad we can't use @people = @_ || ('author', 'committer')
4590         my @people = @_;
4591         @people = ('author', 'committer') unless @people;
4592         foreach my $who (@people) {
4593                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4594                 print "<tr><td>$who</td><td>" .
4595                       format_search_author($co->{"${who}_name"}, $who,
4596                                            esc_html($co->{"${who}_name"})) . " " .
4597                       format_search_author($co->{"${who}_email"}, $who,
4598                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4599                       "</td><td rowspan=\"2\">" .
4600                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4601                       "</td></tr>\n" .
4602                       "<tr>" .
4603                       "<td></td><td>" .
4604                       format_timestamp_html(\%wd) .
4605                       "</td>" .
4606                       "</tr>\n";
4607         }
4608 }
4609
4610 sub git_print_page_path {
4611         my $name = shift;
4612         my $type = shift;
4613         my $hb = shift;
4614
4615
4616         print "<div class=\"page_path\">";
4617         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4618                       -title => 'tree root'}, to_utf8("[$project]"));
4619         print " / ";
4620         if (defined $name) {
4621                 my @dirname = split '/', $name;
4622                 my $basename = pop @dirname;
4623                 my $fullname = '';
4624
4625                 foreach my $dir (@dirname) {
4626                         $fullname .= ($fullname ? '/' : '') . $dir;
4627                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4628                                                      hash_base=>$hb),
4629                                       -title => $fullname}, esc_path($dir));
4630                         print " / ";
4631                 }
4632                 if (defined $type && $type eq 'blob') {
4633                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4634                                                      hash_base=>$hb),
4635                                       -title => $name}, esc_path($basename));
4636                 } elsif (defined $type && $type eq 'tree') {
4637                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4638                                                      hash_base=>$hb),
4639                                       -title => $name}, esc_path($basename));
4640                         print " / ";
4641                 } else {
4642                         print esc_path($basename);
4643                 }
4644         }
4645         print "<br/></div>\n";
4646 }
4647
4648 sub git_print_log {
4649         my $log = shift;
4650         my %opts = @_;
4651
4652         if ($opts{'-remove_title'}) {
4653                 # remove title, i.e. first line of log
4654                 shift @$log;
4655         }
4656         # remove leading empty lines
4657         while (defined $log->[0] && $log->[0] eq "") {
4658                 shift @$log;
4659         }
4660
4661         # print log
4662         my $skip_blank_line = 0;
4663         foreach my $line (@$log) {
4664                 if ($line =~ m/^\s*([A-Z][-A-Za-z]*-([Bb]y|[Tt]o)|C[Cc]|(Clos|Fix)es): /) {
4665                         if (! $opts{'-remove_signoff'}) {
4666                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4667                                 $skip_blank_line = 1;
4668                         }
4669                         next;
4670                 }
4671
4672                 if ($line =~ m,\s*([a-z]*link): (https?://\S+),i) {
4673                         if (! $opts{'-remove_signoff'}) {
4674                                 print "<span class=\"signoff\">" . esc_html($1) . ": " .
4675                                         "<a href=\"" . esc_html($2) . "\">" . esc_html($2) . "</a>" .
4676                                         "</span><br/>\n";
4677                                 $skip_blank_line = 1;
4678                         }
4679                         next;
4680                 }
4681
4682                 # print only one empty line
4683                 # do not print empty line after signoff
4684                 if ($line eq "") {
4685                         next if ($skip_blank_line);
4686                         $skip_blank_line = 1;
4687                 } else {
4688                         $skip_blank_line = 0;
4689                 }
4690
4691                 print format_log_line_html($line) . "<br/>\n";
4692         }
4693
4694         if ($opts{'-final_empty_line'}) {
4695                 # end with single empty line
4696                 print "<br/>\n" unless $skip_blank_line;
4697         }
4698 }
4699
4700 # return link target (what link points to)
4701 sub git_get_link_target {
4702         my $hash = shift;
4703         my $link_target;
4704
4705         # read link
4706         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4707                 or return;
4708         {
4709                 local $/ = undef;
4710                 $link_target = <$fd>;
4711         }
4712         close $fd
4713                 or return;
4714
4715         return $link_target;
4716 }
4717
4718 # given link target, and the directory (basedir) the link is in,
4719 # return target of link relative to top directory (top tree);
4720 # return undef if it is not possible (including absolute links).
4721 sub normalize_link_target {
4722         my ($link_target, $basedir) = @_;
4723
4724         # absolute symlinks (beginning with '/') cannot be normalized
4725         return if (substr($link_target, 0, 1) eq '/');
4726
4727         # normalize link target to path from top (root) tree (dir)
4728         my $path;
4729         if ($basedir) {
4730                 $path = $basedir . '/' . $link_target;
4731         } else {
4732                 # we are in top (root) tree (dir)
4733                 $path = $link_target;
4734         }
4735
4736         # remove //, /./, and /../
4737         my @path_parts;
4738         foreach my $part (split('/', $path)) {
4739                 # discard '.' and ''
4740                 next if (!$part || $part eq '.');
4741                 # handle '..'
4742                 if ($part eq '..') {
4743                         if (@path_parts) {
4744                                 pop @path_parts;
4745                         } else {
4746                                 # link leads outside repository (outside top dir)
4747                                 return;
4748                         }
4749                 } else {
4750                         push @path_parts, $part;
4751                 }
4752         }
4753         $path = join('/', @path_parts);
4754
4755         return $path;
4756 }
4757
4758 # print tree entry (row of git_tree), but without encompassing <tr> element
4759 sub git_print_tree_entry {
4760         my ($t, $basedir, $hash_base, $have_blame) = @_;
4761
4762         my %base_key = ();
4763         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4764
4765         # The format of a table row is: mode list link.  Where mode is
4766         # the mode of the entry, list is the name of the entry, an href,
4767         # and link is the action links of the entry.
4768
4769         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4770         if (exists $t->{'size'}) {
4771                 print "<td class=\"size\">$t->{'size'}</td>\n";
4772         }
4773         if ($t->{'type'} eq "blob") {
4774                 print "<td class=\"list\">" .
4775                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4776                                                file_name=>"$basedir$t->{'name'}", %base_key),
4777                                 -class => "list"}, esc_path($t->{'name'}));
4778                 if (S_ISLNK(oct $t->{'mode'})) {
4779                         my $link_target = git_get_link_target($t->{'hash'});
4780                         if ($link_target) {
4781                                 my $norm_target = normalize_link_target($link_target, $basedir);
4782                                 if (defined $norm_target) {
4783                                         print " -> " .
4784                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4785                                                                      file_name=>$norm_target),
4786                                                        -title => $norm_target}, esc_path($link_target));
4787                                 } else {
4788                                         print " -> " . esc_path($link_target);
4789                                 }
4790                         }
4791                 }
4792                 print "</td>\n";
4793                 print "<td class=\"link\">";
4794                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4795                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4796                               "blob");
4797                 if ($have_blame) {
4798                         print " | " .
4799                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4800                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4801                                       "blame");
4802                 }
4803                 if (defined $hash_base) {
4804                         print " | " .
4805                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4806                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4807                                       "history");
4808                 }
4809                 print " | " .
4810                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4811                                                file_name=>"$basedir$t->{'name'}")},
4812                                 "raw");
4813                 print "</td>\n";
4814
4815         } elsif ($t->{'type'} eq "tree") {
4816                 print "<td class=\"list\">";
4817                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4818                                              file_name=>"$basedir$t->{'name'}",
4819                                              %base_key)},
4820                               esc_path($t->{'name'}));
4821                 print "</td>\n";
4822                 print "<td class=\"link\">";
4823                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4824                                              file_name=>"$basedir$t->{'name'}",
4825                                              %base_key)},
4826                               "tree");
4827                 if (defined $hash_base) {
4828                         print " | " .
4829                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4830                                                      file_name=>"$basedir$t->{'name'}")},
4831                                       "history");
4832                 }
4833                 print "</td>\n";
4834         } else {
4835                 # unknown object: we can only present history for it
4836                 # (this includes 'commit' object, i.e. submodule support)
4837                 print "<td class=\"list\">" .
4838                       esc_path($t->{'name'}) .
4839                       "</td>\n";
4840                 print "<td class=\"link\">";
4841                 if (defined $hash_base) {
4842                         print $cgi->a({-href => href(action=>"history",
4843                                                      hash_base=>$hash_base,
4844                                                      file_name=>"$basedir$t->{'name'}")},
4845                                       "history");
4846                 }
4847                 print "</td>\n";
4848         }
4849 }
4850
4851 ## ......................................................................
4852 ## functions printing large fragments of HTML
4853
4854 # get pre-image filenames for merge (combined) diff
4855 sub fill_from_file_info {
4856         my ($diff, @parents) = @_;
4857
4858         $diff->{'from_file'} = [ ];
4859         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4860         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4861                 if ($diff->{'status'}[$i] eq 'R' ||
4862                     $diff->{'status'}[$i] eq 'C') {
4863                         $diff->{'from_file'}[$i] =
4864                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4865                 }
4866         }
4867
4868         return $diff;
4869 }
4870
4871 # is current raw difftree line of file deletion
4872 sub is_deleted {
4873         my $diffinfo = shift;
4874
4875         return $diffinfo->{'to_id'} eq ('0' x 40) || $diffinfo->{'to_id'} eq ('0' x 64);
4876 }
4877
4878 # does patch correspond to [previous] difftree raw line
4879 # $diffinfo  - hashref of parsed raw diff format
4880 # $patchinfo - hashref of parsed patch diff format
4881 #              (the same keys as in $diffinfo)
4882 sub is_patch_split {
4883         my ($diffinfo, $patchinfo) = @_;
4884
4885         return defined $diffinfo && defined $patchinfo
4886                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4887 }
4888
4889
4890 sub git_difftree_body {
4891         my ($difftree, $hash, @parents) = @_;
4892         my ($parent) = $parents[0];
4893         my $have_blame = gitweb_check_feature('blame');
4894         print "<div class=\"list_head\">\n";
4895         if ($#{$difftree} > 10) {
4896                 print(($#{$difftree} + 1) . " files changed:\n");
4897         }
4898         print "</div>\n";
4899
4900         print "<table class=\"" .
4901               (@parents > 1 ? "combined " : "") .
4902               "diff_tree\">\n";
4903
4904         # header only for combined diff in 'commitdiff' view
4905         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4906         if ($has_header) {
4907                 # table header
4908                 print "<thead><tr>\n" .
4909                        "<th></th><th></th>\n"; # filename, patchN link
4910                 for (my $i = 0; $i < @parents; $i++) {
4911                         my $par = $parents[$i];
4912                         print "<th>" .
4913                               $cgi->a({-href => href(action=>"commitdiff",
4914                                                      hash=>$hash, hash_parent=>$par),
4915                                        -title => 'commitdiff to parent number ' .
4916                                                   ($i+1) . ': ' . substr($par,0,7)},
4917                                       $i+1) .
4918                               "&nbsp;</th>\n";
4919                 }
4920                 print "</tr></thead>\n<tbody>\n";
4921         }
4922
4923         my $alternate = 1;
4924         my $patchno = 0;
4925         foreach my $line (@{$difftree}) {
4926                 my $diff = parsed_difftree_line($line);
4927
4928                 if ($alternate) {
4929                         print "<tr class=\"dark\">\n";
4930                 } else {
4931                         print "<tr class=\"light\">\n";
4932                 }
4933                 $alternate ^= 1;
4934
4935                 if (exists $diff->{'nparents'}) { # combined diff
4936
4937                         fill_from_file_info($diff, @parents)
4938                                 unless exists $diff->{'from_file'};
4939
4940                         if (!is_deleted($diff)) {
4941                                 # file exists in the result (child) commit
4942                                 print "<td>" .
4943                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4944                                                              file_name=>$diff->{'to_file'},
4945                                                              hash_base=>$hash),
4946                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4947                                       "</td>\n";
4948                         } else {
4949                                 print "<td>" .
4950                                       esc_path($diff->{'to_file'}) .
4951                                       "</td>\n";
4952                         }
4953
4954                         if ($action eq 'commitdiff') {
4955                                 # link to patch
4956                                 $patchno++;
4957                                 print "<td class=\"link\">" .
4958                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4959                                               "patch") .
4960                                       " | " .
4961                                       "</td>\n";
4962                         }
4963
4964                         my $has_history = 0;
4965                         my $not_deleted = 0;
4966                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4967                                 my $hash_parent = $parents[$i];
4968                                 my $from_hash = $diff->{'from_id'}[$i];
4969                                 my $from_path = $diff->{'from_file'}[$i];
4970                                 my $status = $diff->{'status'}[$i];
4971
4972                                 $has_history ||= ($status ne 'A');
4973                                 $not_deleted ||= ($status ne 'D');
4974
4975                                 if ($status eq 'A') {
4976                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4977                                 } elsif ($status eq 'D') {
4978                                         print "<td class=\"link\">" .
4979                                               $cgi->a({-href => href(action=>"blob",
4980                                                                      hash_base=>$hash,
4981                                                                      hash=>$from_hash,
4982                                                                      file_name=>$from_path)},
4983                                                       "blob" . ($i+1)) .
4984                                               " | </td>\n";
4985                                 } else {
4986                                         if ($diff->{'to_id'} eq $from_hash) {
4987                                                 print "<td class=\"link nochange\">";
4988                                         } else {
4989                                                 print "<td class=\"link\">";
4990                                         }
4991                                         print $cgi->a({-href => href(action=>"blobdiff",
4992                                                                      hash=>$diff->{'to_id'},
4993                                                                      hash_parent=>$from_hash,
4994                                                                      hash_base=>$hash,
4995                                                                      hash_parent_base=>$hash_parent,
4996                                                                      file_name=>$diff->{'to_file'},
4997                                                                      file_parent=>$from_path)},
4998                                                       "diff" . ($i+1)) .
4999                                               " | </td>\n";
5000                                 }
5001                         }
5002
5003                         print "<td class=\"link\">";
5004                         if ($not_deleted) {
5005                                 print $cgi->a({-href => href(action=>"blob",
5006                                                              hash=>$diff->{'to_id'},
5007                                                              file_name=>$diff->{'to_file'},
5008                                                              hash_base=>$hash)},
5009                                               "blob");
5010                                 print " | " if ($has_history);
5011                         }
5012                         if ($has_history) {
5013                                 print $cgi->a({-href => href(action=>"history",
5014                                                              file_name=>$diff->{'to_file'},
5015                                                              hash_base=>$hash)},
5016                                               "history");
5017                         }
5018                         print "</td>\n";
5019
5020                         print "</tr>\n";
5021                         next; # instead of 'else' clause, to avoid extra indent
5022                 }
5023                 # else ordinary diff
5024
5025                 my ($to_mode_oct, $to_mode_str, $to_file_type);
5026                 my ($from_mode_oct, $from_mode_str, $from_file_type);
5027                 if ($diff->{'to_mode'} ne ('0' x 6)) {
5028                         $to_mode_oct = oct $diff->{'to_mode'};
5029                         if (S_ISREG($to_mode_oct)) { # only for regular file
5030                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
5031                         }
5032                         $to_file_type = file_type($diff->{'to_mode'});
5033                 }
5034                 if ($diff->{'from_mode'} ne ('0' x 6)) {
5035                         $from_mode_oct = oct $diff->{'from_mode'};
5036                         if (S_ISREG($from_mode_oct)) { # only for regular file
5037                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
5038                         }
5039                         $from_file_type = file_type($diff->{'from_mode'});
5040                 }
5041
5042                 if ($diff->{'status'} eq "A") { # created
5043                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
5044                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
5045                         $mode_chng   .= "]</span>";
5046                         print "<td>";
5047                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5048                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
5049                                       -class => "list"}, esc_path($diff->{'file'}));
5050                         print "</td>\n";
5051                         print "<td>$mode_chng</td>\n";
5052                         print "<td class=\"link\">";
5053                         if ($action eq 'commitdiff') {
5054                                 # link to patch
5055                                 $patchno++;
5056                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5057                                               "patch") .
5058                                       " | ";
5059                         }
5060                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5061                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
5062                                       "blob");
5063                         print "</td>\n";
5064
5065                 } elsif ($diff->{'status'} eq "D") { # deleted
5066                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
5067                         print "<td>";
5068                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
5069                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
5070                                        -class => "list"}, esc_path($diff->{'file'}));
5071                         print "</td>\n";
5072                         print "<td>$mode_chng</td>\n";
5073                         print "<td class=\"link\">";
5074                         if ($action eq 'commitdiff') {
5075                                 # link to patch
5076                                 $patchno++;
5077                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5078                                               "patch") .
5079                                       " | ";
5080                         }
5081                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
5082                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
5083                                       "blob") . " | ";
5084                         if ($have_blame) {
5085                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
5086                                                              file_name=>$diff->{'file'})},
5087                                               "blame") . " | ";
5088                         }
5089                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
5090                                                      file_name=>$diff->{'file'})},
5091                                       "history");
5092                         print "</td>\n";
5093
5094                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
5095                         my $mode_chnge = "";
5096                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5097                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
5098                                 if ($from_file_type ne $to_file_type) {
5099                                         $mode_chnge .= " from $from_file_type to $to_file_type";
5100                                 }
5101                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
5102                                         if ($from_mode_str && $to_mode_str) {
5103                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
5104                                         } elsif ($to_mode_str) {
5105                                                 $mode_chnge .= " mode: $to_mode_str";
5106                                         }
5107                                 }
5108                                 $mode_chnge .= "]</span>\n";
5109                         }
5110                         print "<td>";
5111                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5112                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
5113                                       -class => "list"}, esc_path($diff->{'file'}));
5114                         print "</td>\n";
5115                         print "<td>$mode_chnge</td>\n";
5116                         print "<td class=\"link\">";
5117                         if ($action eq 'commitdiff') {
5118                                 # link to patch
5119                                 $patchno++;
5120                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5121                                               "patch") .
5122                                       " | ";
5123                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5124                                 # "commit" view and modified file (not onlu mode changed)
5125                                 print $cgi->a({-href => href(action=>"blobdiff",
5126                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5127                                                              hash_base=>$hash, hash_parent_base=>$parent,
5128                                                              file_name=>$diff->{'file'})},
5129                                               "diff") .
5130                                       " | ";
5131                         }
5132                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5133                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
5134                                        "blob") . " | ";
5135                         if ($have_blame) {
5136                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5137                                                              file_name=>$diff->{'file'})},
5138                                               "blame") . " | ";
5139                         }
5140                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5141                                                      file_name=>$diff->{'file'})},
5142                                       "history");
5143                         print "</td>\n";
5144
5145                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
5146                         my %status_name = ('R' => 'moved', 'C' => 'copied');
5147                         my $nstatus = $status_name{$diff->{'status'}};
5148                         my $mode_chng = "";
5149                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5150                                 # mode also for directories, so we cannot use $to_mode_str
5151                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
5152                         }
5153                         print "<td>" .
5154                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
5155                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
5156                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
5157                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
5158                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
5159                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
5160                                       -class => "list"}, esc_path($diff->{'from_file'})) .
5161                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
5162                               "<td class=\"link\">";
5163                         if ($action eq 'commitdiff') {
5164                                 # link to patch
5165                                 $patchno++;
5166                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5167                                               "patch") .
5168                                       " | ";
5169                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5170                                 # "commit" view and modified file (not only pure rename or copy)
5171                                 print $cgi->a({-href => href(action=>"blobdiff",
5172                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5173                                                              hash_base=>$hash, hash_parent_base=>$parent,
5174                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
5175                                               "diff") .
5176                                       " | ";
5177                         }
5178                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5179                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
5180                                       "blob") . " | ";
5181                         if ($have_blame) {
5182                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5183                                                              file_name=>$diff->{'to_file'})},
5184                                               "blame") . " | ";
5185                         }
5186                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5187                                                     file_name=>$diff->{'to_file'})},
5188                                       "history");
5189                         print "</td>\n";
5190
5191                 } # we should not encounter Unmerged (U) or Unknown (X) status
5192                 print "</tr>\n";
5193         }
5194         print "</tbody>" if $has_header;
5195         print "</table>\n";
5196 }
5197
5198 # Print context lines and then rem/add lines in a side-by-side manner.
5199 sub print_sidebyside_diff_lines {
5200         my ($ctx, $rem, $add) = @_;
5201
5202         # print context block before add/rem block
5203         if (@$ctx) {
5204                 print join '',
5205                         '<div class="chunk_block ctx">',
5206                                 '<div class="old">',
5207                                 @$ctx,
5208                                 '</div>',
5209                                 '<div class="new">',
5210                                 @$ctx,
5211                                 '</div>',
5212                         '</div>';
5213         }
5214
5215         if (!@$add) {
5216                 # pure removal
5217                 print join '',
5218                         '<div class="chunk_block rem">',
5219                                 '<div class="old">',
5220                                 @$rem,
5221                                 '</div>',
5222                         '</div>';
5223         } elsif (!@$rem) {
5224                 # pure addition
5225                 print join '',
5226                         '<div class="chunk_block add">',
5227                                 '<div class="new">',
5228                                 @$add,
5229                                 '</div>',
5230                         '</div>';
5231         } else {
5232                 print join '',
5233                         '<div class="chunk_block chg">',
5234                                 '<div class="old">',
5235                                 @$rem,
5236                                 '</div>',
5237                                 '<div class="new">',
5238                                 @$add,
5239                                 '</div>',
5240                         '</div>';
5241         }
5242 }
5243
5244 # Print context lines and then rem/add lines in inline manner.
5245 sub print_inline_diff_lines {
5246         my ($ctx, $rem, $add) = @_;
5247
5248         print @$ctx, @$rem, @$add;
5249 }
5250
5251 # Format removed and added line, mark changed part and HTML-format them.
5252 # Implementation is based on contrib/diff-highlight
5253 sub format_rem_add_lines_pair {
5254         my ($rem, $add, $num_parents) = @_;
5255
5256         # We need to untabify lines before split()'ing them;
5257         # otherwise offsets would be invalid.
5258         chomp $rem;
5259         chomp $add;
5260         $rem = untabify($rem);
5261         $add = untabify($add);
5262
5263         my @rem = split(//, $rem);
5264         my @add = split(//, $add);
5265         my ($esc_rem, $esc_add);
5266         # Ignore leading +/- characters for each parent.
5267         my ($prefix_len, $suffix_len) = ($num_parents, 0);
5268         my ($prefix_has_nonspace, $suffix_has_nonspace);
5269
5270         my $shorter = (@rem < @add) ? @rem : @add;
5271         while ($prefix_len < $shorter) {
5272                 last if ($rem[$prefix_len] ne $add[$prefix_len]);
5273
5274                 $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5275                 $prefix_len++;
5276         }
5277
5278         while ($prefix_len + $suffix_len < $shorter) {
5279                 last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5280
5281                 $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5282                 $suffix_len++;
5283         }
5284
5285         # Mark lines that are different from each other, but have some common
5286         # part that isn't whitespace.  If lines are completely different, don't
5287         # mark them because that would make output unreadable, especially if
5288         # diff consists of multiple lines.
5289         if ($prefix_has_nonspace || $suffix_has_nonspace) {
5290                 $esc_rem = esc_html_hl_regions($rem, 'marked',
5291                         [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5292                 $esc_add = esc_html_hl_regions($add, 'marked',
5293                         [$prefix_len, @add - $suffix_len], -nbsp=>1);
5294         } else {
5295                 $esc_rem = esc_html($rem, -nbsp=>1);
5296                 $esc_add = esc_html($add, -nbsp=>1);
5297         }
5298
5299         return format_diff_line(\$esc_rem, 'rem'),
5300                format_diff_line(\$esc_add, 'add');
5301 }
5302
5303 # HTML-format diff context, removed and added lines.
5304 sub format_ctx_rem_add_lines {
5305         my ($ctx, $rem, $add, $num_parents) = @_;
5306         my (@new_ctx, @new_rem, @new_add);
5307         my $can_highlight = 0;
5308         my $is_combined = ($num_parents > 1);
5309
5310         # Highlight if every removed line has a corresponding added line.
5311         if (@$add > 0 && @$add == @$rem) {
5312                 $can_highlight = 1;
5313
5314                 # Highlight lines in combined diff only if the chunk contains
5315                 # diff between the same version, e.g.
5316                 #
5317                 #    - a
5318                 #   -  b
5319                 #    + c
5320                 #   +  d
5321                 #
5322                 # Otherwise the highlighting would be confusing.
5323                 if ($is_combined) {
5324                         for (my $i = 0; $i < @$add; $i++) {
5325                                 my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5326                                 my $prefix_add = substr($add->[$i], 0, $num_parents);
5327
5328                                 $prefix_rem =~ s/-/+/g;
5329
5330                                 if ($prefix_rem ne $prefix_add) {
5331                                         $can_highlight = 0;
5332                                         last;
5333                                 }
5334                         }
5335                 }
5336         }
5337
5338         if ($can_highlight) {
5339                 for (my $i = 0; $i < @$add; $i++) {
5340                         my ($line_rem, $line_add) = format_rem_add_lines_pair(
5341                                 $rem->[$i], $add->[$i], $num_parents);
5342                         push @new_rem, $line_rem;
5343                         push @new_add, $line_add;
5344                 }
5345         } else {
5346                 @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5347                 @new_add = map { format_diff_line($_, 'add') } @$add;
5348         }
5349
5350         @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5351
5352         return (\@new_ctx, \@new_rem, \@new_add);
5353 }
5354
5355 # Print context lines and then rem/add lines.
5356 sub print_diff_lines {
5357         my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5358         my $is_combined = $num_parents > 1;
5359
5360         ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5361                 $num_parents);
5362
5363         if ($diff_style eq 'sidebyside' && !$is_combined) {
5364                 print_sidebyside_diff_lines($ctx, $rem, $add);
5365         } else {
5366                 # default 'inline' style and unknown styles
5367                 print_inline_diff_lines($ctx, $rem, $add);
5368         }
5369 }
5370
5371 sub print_diff_chunk {
5372         my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5373         my (@ctx, @rem, @add);
5374
5375         # The class of the previous line.
5376         my $prev_class = '';
5377
5378         return unless @chunk;
5379
5380         # incomplete last line might be among removed or added lines,
5381         # or both, or among context lines: find which
5382         for (my $i = 1; $i < @chunk; $i++) {
5383                 if ($chunk[$i][0] eq 'incomplete') {
5384                         $chunk[$i][0] = $chunk[$i-1][0];
5385                 }
5386         }
5387
5388         # guardian
5389         push @chunk, ["", ""];
5390
5391         foreach my $line_info (@chunk) {
5392                 my ($class, $line) = @$line_info;
5393
5394                 # print chunk headers
5395                 if ($class && $class eq 'chunk_header') {
5396                         print format_diff_line($line, $class, $from, $to);
5397                         next;
5398                 }
5399
5400                 ## print from accumulator when have some add/rem lines or end
5401                 # of chunk (flush context lines), or when have add and rem
5402                 # lines and new block is reached (otherwise add/rem lines could
5403                 # be reordered)
5404                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5405                     (@rem && @add && $class ne $prev_class)) {
5406                         print_diff_lines(\@ctx, \@rem, \@add,
5407                                          $diff_style, $num_parents);
5408                         @ctx = @rem = @add = ();
5409                 }
5410
5411                 ## adding lines to accumulator
5412                 # guardian value
5413                 last unless $line;
5414                 # rem, add or change
5415                 if ($class eq 'rem') {
5416                         push @rem, $line;
5417                 } elsif ($class eq 'add') {
5418                         push @add, $line;
5419                 }
5420                 # context line
5421                 if ($class eq 'ctx') {
5422                         push @ctx, $line;
5423                 }
5424
5425                 $prev_class = $class;
5426         }
5427 }
5428
5429 sub git_patchset_body {
5430         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5431         my ($hash_parent) = $hash_parents[0];
5432
5433         my $is_combined = (@hash_parents > 1);
5434         my $patch_idx = 0;
5435         my $patch_number = 0;
5436         my $patch_line;
5437         my $diffinfo;
5438         my $to_name;
5439         my (%from, %to);
5440         my @chunk; # for side-by-side diff
5441
5442         print "<div class=\"patchset\">\n";
5443
5444         # skip to first patch
5445         while ($patch_line = <$fd>) {
5446                 chomp $patch_line;
5447
5448                 last if ($patch_line =~ m/^diff /);
5449         }
5450
5451  PATCH:
5452         while ($patch_line) {
5453
5454                 # parse "git diff" header line
5455                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5456                         # $1 is from_name, which we do not use
5457                         $to_name = unquote($2);
5458                         $to_name =~ s!^b/!!;
5459                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5460                         # $1 is 'cc' or 'combined', which we do not use
5461                         $to_name = unquote($2);
5462                 } else {
5463                         $to_name = undef;
5464                 }
5465
5466                 # check if current patch belong to current raw line
5467                 # and parse raw git-diff line if needed
5468                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5469                         # this is continuation of a split patch
5470                         print "<div class=\"patch cont\">\n";
5471                 } else {
5472                         # advance raw git-diff output if needed
5473                         $patch_idx++ if defined $diffinfo;
5474
5475                         # read and prepare patch information
5476                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5477
5478                         # compact combined diff output can have some patches skipped
5479                         # find which patch (using pathname of result) we are at now;
5480                         if ($is_combined) {
5481                                 while ($to_name ne $diffinfo->{'to_file'}) {
5482                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5483                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5484                                               "</div>\n";  # class="patch"
5485
5486                                         $patch_idx++;
5487                                         $patch_number++;
5488
5489                                         last if $patch_idx > $#$difftree;
5490                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5491                                 }
5492                         }
5493
5494                         # modifies %from, %to hashes
5495                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5496
5497                         # this is first patch for raw difftree line with $patch_idx index
5498                         # we index @$difftree array from 0, but number patches from 1
5499                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5500                 }
5501
5502                 # git diff header
5503                 #assert($patch_line =~ m/^diff /) if DEBUG;
5504                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5505                 $patch_number++;
5506                 # print "git diff" header
5507                 print format_git_diff_header_line($patch_line, $diffinfo,
5508                                                   \%from, \%to);
5509
5510                 # print extended diff header
5511                 print "<div class=\"diff extended_header\">\n";
5512         EXTENDED_HEADER:
5513                 while ($patch_line = <$fd>) {
5514                         chomp $patch_line;
5515
5516                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5517
5518                         print format_extended_diff_header_line($patch_line, $diffinfo,
5519                                                                \%from, \%to);
5520                 }
5521                 print "</div>\n"; # class="diff extended_header"
5522
5523                 # from-file/to-file diff header
5524                 if (! $patch_line) {
5525                         print "</div>\n"; # class="patch"
5526                         last PATCH;
5527                 }
5528                 next PATCH if ($patch_line =~ m/^diff /);
5529                 #assert($patch_line =~ m/^---/) if DEBUG;
5530
5531                 my $last_patch_line = $patch_line;
5532                 $patch_line = <$fd>;
5533                 chomp $patch_line;
5534                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5535
5536                 print format_diff_from_to_header($last_patch_line, $patch_line,
5537                                                  $diffinfo, \%from, \%to,
5538                                                  @hash_parents);
5539
5540                 # the patch itself
5541         LINE:
5542                 while ($patch_line = <$fd>) {
5543                         chomp $patch_line;
5544
5545                         next PATCH if ($patch_line =~ m/^diff /);
5546
5547                         my $class = diff_line_class($patch_line, \%from, \%to);
5548
5549                         if ($class eq 'chunk_header') {
5550                                 print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5551                                 @chunk = ();
5552                         }
5553
5554                         push @chunk, [ $class, $patch_line ];
5555                 }
5556
5557         } continue {
5558                 if (@chunk) {
5559                         print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5560                         @chunk = ();
5561                 }
5562                 print "</div>\n"; # class="patch"
5563         }
5564
5565         # for compact combined (--cc) format, with chunk and patch simplification
5566         # the patchset might be empty, but there might be unprocessed raw lines
5567         for (++$patch_idx if $patch_number > 0;
5568              $patch_idx < @$difftree;
5569              ++$patch_idx) {
5570                 # read and prepare patch information
5571                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5572
5573                 # generate anchor for "patch" links in difftree / whatchanged part
5574                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5575                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5576                       "</div>\n";  # class="patch"
5577
5578                 $patch_number++;
5579         }
5580
5581         if ($patch_number == 0) {
5582                 if (@hash_parents > 1) {
5583                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5584                 } else {
5585                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5586                 }
5587         }
5588
5589         print "</div>\n"; # class="patchset"
5590 }
5591
5592 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5593
5594 sub git_project_search_form {
5595         my ($searchtext, $search_use_regexp) = @_;
5596
5597         my $limit = '';
5598         if ($project_filter) {
5599                 $limit = " in '$project_filter/'";
5600         }
5601
5602         print "<div class=\"projsearch\">\n";
5603         print $cgi->start_form(-method => 'get', -action => $my_uri) .
5604               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5605         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5606                 if (defined $project_filter);
5607         print $cgi->textfield(-name => 's', -value => $searchtext,
5608                               -title => "Search project by name and description$limit",
5609                               -size => 60) . "\n" .
5610               "<span title=\"Extended regular expression\">" .
5611               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5612                              -checked => $search_use_regexp) .
5613               "</span>\n" .
5614               $cgi->submit(-name => 'btnS', -value => 'Search') .
5615               $cgi->end_form() . "\n" .
5616               $cgi->a({-href => href(project => undef, searchtext => undef,
5617                                      project_filter => $project_filter)},
5618                       esc_html("List all projects$limit")) . "<br />\n";
5619         print "</div>\n";
5620 }
5621
5622 # entry for given @keys needs filling if at least one of keys in list
5623 # is not present in %$project_info
5624 sub project_info_needs_filling {
5625         my ($project_info, @keys) = @_;
5626
5627         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5628         foreach my $key (@keys) {
5629                 if (!exists $project_info->{$key}) {
5630                         return 1;
5631                 }
5632         }
5633         return;
5634 }
5635
5636 # fills project list info (age, description, owner, category, forks, etc.)
5637 # for each project in the list, removing invalid projects from
5638 # returned list, or fill only specified info.
5639 #
5640 # Invalid projects are removed from the returned list if and only if you
5641 # ask 'age' or 'age_string' to be filled, because they are the only fields
5642 # that run unconditionally git command that requires repository, and
5643 # therefore do always check if project repository is invalid.
5644 #
5645 # USAGE:
5646 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5647 #   ensures that 'descr_long' and 'ctags' fields are filled
5648 # * @project_list = fill_project_list_info(\@project_list)
5649 #   ensures that all fields are filled (and invalid projects removed)
5650 #
5651 # NOTE: modifies $projlist, but does not remove entries from it
5652 sub fill_project_list_info {
5653         my ($projlist, @wanted_keys) = @_;
5654         my @projects;
5655         my $filter_set = sub { return @_; };
5656         if (@wanted_keys) {
5657                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5658                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5659         }
5660
5661         my $show_ctags = gitweb_check_feature('ctags');
5662  PROJECT:
5663         foreach my $pr (@$projlist) {
5664                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5665                         my (@activity) = git_get_last_activity($pr->{'path'});
5666                         unless (@activity) {
5667                                 next PROJECT;
5668                         }
5669                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5670                 }
5671                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5672                         my $descr = git_get_project_description($pr->{'path'}) || "";
5673                         $descr = to_utf8($descr);
5674                         $pr->{'descr_long'} = $descr;
5675                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5676                 }
5677                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5678                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5679                 }
5680                 if ($show_ctags &&
5681                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5682                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5683                 }
5684                 if ($projects_list_group_categories &&
5685                     project_info_needs_filling($pr, $filter_set->('category'))) {
5686                         my $cat = git_get_project_category($pr->{'path'}) ||
5687                                                            $project_list_default_category;
5688                         $pr->{'category'} = to_utf8($cat);
5689                 }
5690
5691                 push @projects, $pr;
5692         }
5693
5694         return @projects;
5695 }
5696
5697 sub sort_projects_list {
5698         my ($projlist, $order) = @_;
5699
5700         sub order_str {
5701                 my $key = shift;
5702                 return sub { $a->{$key} cmp $b->{$key} };
5703         }
5704
5705         sub order_num_then_undef {
5706                 my $key = shift;
5707                 return sub {
5708                         defined $a->{$key} ?
5709                                 (defined $b->{$key} ? $a->{$key} <=> $b->{$key} : -1) :
5710                                 (defined $b->{$key} ? 1 : 0)
5711                 };
5712         }
5713
5714         my %orderings = (
5715                 project => order_str('path'),
5716                 descr => order_str('descr_long'),
5717                 owner => order_str('owner'),
5718                 age => order_num_then_undef('age'),
5719         );
5720
5721         my $ordering = $orderings{$order};
5722         return defined $ordering ? sort $ordering @$projlist : @$projlist;
5723 }
5724
5725 # returns a hash of categories, containing the list of project
5726 # belonging to each category
5727 sub build_projlist_by_category {
5728         my ($projlist, $from, $to) = @_;
5729         my %categories;
5730
5731         $from = 0 unless defined $from;
5732         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5733
5734         for (my $i = $from; $i <= $to; $i++) {
5735                 my $pr = $projlist->[$i];
5736                 push @{$categories{ $pr->{'category'} }}, $pr;
5737         }
5738
5739         return wantarray ? %categories : \%categories;
5740 }
5741
5742 # print 'sort by' <th> element, generating 'sort by $name' replay link
5743 # if that order is not selected
5744 sub print_sort_th {
5745         print format_sort_th(@_);
5746 }
5747
5748 sub format_sort_th {
5749         my ($name, $order, $header) = @_;
5750         my $sort_th = "";
5751         $header ||= ucfirst($name);
5752
5753         if ($order eq $name) {
5754                 $sort_th .= "<th>$header</th>\n";
5755         } else {
5756                 $sort_th .= "<th>" .
5757                             $cgi->a({-href => href(-replay=>1, order=>$name),
5758                                      -class => "header"}, $header) .
5759                             "</th>\n";
5760         }
5761
5762         return $sort_th;
5763 }
5764
5765 sub git_project_list_rows {
5766         my ($projlist, $from, $to, $check_forks) = @_;
5767
5768         $from = 0 unless defined $from;
5769         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5770
5771         my $alternate = 1;
5772         for (my $i = $from; $i <= $to; $i++) {
5773                 my $pr = $projlist->[$i];
5774
5775                 if ($alternate) {
5776                         print "<tr class=\"dark\">\n";
5777                 } else {
5778                         print "<tr class=\"light\">\n";
5779                 }
5780                 $alternate ^= 1;
5781
5782                 if ($check_forks) {
5783                         print "<td>";
5784                         if ($pr->{'forks'}) {
5785                                 my $nforks = scalar @{$pr->{'forks'}};
5786                                 if ($nforks > 0) {
5787                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5788                                                        -title => "$nforks forks"}, "+");
5789                                 } else {
5790                                         print $cgi->span({-title => "$nforks forks"}, "+");
5791                                 }
5792                         }
5793                         print "</td>\n";
5794                 }
5795                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5796                                         -class => "list"},
5797                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5798                       "</td>\n" .
5799                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5800                                         -class => "list",
5801                                         -title => $pr->{'descr_long'}},
5802                                         $search_regexp
5803                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5804                                                                     $pr->{'descr'}, $search_regexp)
5805                                         : esc_html($pr->{'descr'})) .
5806                       "</td>\n";
5807                 unless ($omit_owner) {
5808                         print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5809                 }
5810                 unless ($omit_age_column) {
5811                         print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5812                             (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5813                 }
5814                 print"<td class=\"link\">" .
5815                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5816                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5817                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5818                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5819                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5820                       "</td>\n" .
5821                       "</tr>\n";
5822         }
5823 }
5824
5825 sub git_project_list_body {
5826         # actually uses global variable $project
5827         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5828         my @projects = @$projlist;
5829
5830         my $check_forks = gitweb_check_feature('forks');
5831         my $show_ctags  = gitweb_check_feature('ctags');
5832         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5833         $check_forks = undef
5834                 if ($tagfilter || $search_regexp);
5835
5836         # filtering out forks before filling info allows to do less work
5837         @projects = filter_forks_from_projects_list(\@projects)
5838                 if ($check_forks);
5839         # search_projects_list pre-fills required info
5840         @projects = search_projects_list(\@projects,
5841                                          'search_regexp' => $search_regexp,
5842                                          'tagfilter'  => $tagfilter)
5843                 if ($tagfilter || $search_regexp);
5844         # fill the rest
5845         my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5846         push @all_fields, ('age', 'age_string') unless($omit_age_column);
5847         push @all_fields, 'owner' unless($omit_owner);
5848         @projects = fill_project_list_info(\@projects, @all_fields);
5849
5850         $order ||= $default_projects_order;
5851         $from = 0 unless defined $from;
5852         $to = $#projects if (!defined $to || $#projects < $to);
5853
5854         # short circuit
5855         if ($from > $to) {
5856                 print "<center>\n".
5857                       "<b>No such projects found</b><br />\n".
5858                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5859                       "</center>\n<br />\n";
5860                 return;
5861         }
5862
5863         @projects = sort_projects_list(\@projects, $order);
5864
5865         if ($show_ctags) {
5866                 my $ctags = git_gather_all_ctags(\@projects);
5867                 my $cloud = git_populate_project_tagcloud($ctags);
5868                 print git_show_project_tagcloud($cloud, 64);
5869         }
5870
5871         print "<table class=\"project_list\">\n";
5872         unless ($no_header) {
5873                 print "<tr>\n";
5874                 if ($check_forks) {
5875                         print "<th></th>\n";
5876                 }
5877                 print_sort_th('project', $order, 'Project');
5878                 print_sort_th('descr', $order, 'Description');
5879                 print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5880                 print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5881                 print "<th></th>\n" . # for links
5882                       "</tr>\n";
5883         }
5884
5885         if ($projects_list_group_categories) {
5886                 # only display categories with projects in the $from-$to window
5887                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5888                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5889                 foreach my $cat (sort keys %categories) {
5890                         unless ($cat eq "") {
5891                                 print "<tr>\n";
5892                                 if ($check_forks) {
5893                                         print "<td></td>\n";
5894                                 }
5895                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5896                                 print "</tr>\n";
5897                         }
5898
5899                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5900                 }
5901         } else {
5902                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5903         }
5904
5905         if (defined $extra) {
5906                 print "<tr>\n";
5907                 if ($check_forks) {
5908                         print "<td></td>\n";
5909                 }
5910                 print "<td colspan=\"5\">$extra</td>\n" .
5911                       "</tr>\n";
5912         }
5913         print "</table>\n";
5914 }
5915
5916 sub git_log_body {
5917         # uses global variable $project
5918         my ($commitlist, $from, $to, $refs, $extra) = @_;
5919
5920         $from = 0 unless defined $from;
5921         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5922
5923         for (my $i = 0; $i <= $to; $i++) {
5924                 my %co = %{$commitlist->[$i]};
5925                 next if !%co;
5926                 my $commit = $co{'id'};
5927                 my $ref = format_ref_marker($refs, $commit);
5928                 git_print_header_div('commit',
5929                                "<span class=\"age\">$co{'age_string'}</span>" .
5930                                esc_html($co{'title'}) . $ref,
5931                                $commit);
5932                 print "<div class=\"title_text\">\n" .
5933                       "<div class=\"log_link\">\n" .
5934                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5935                       " | " .
5936                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5937                       " | " .
5938                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5939                       "<br/>\n" .
5940                       "</div>\n";
5941                       git_print_authorship(\%co, -tag => 'span');
5942                       print "<br/>\n</div>\n";
5943
5944                 print "<div class=\"log_body\">\n";
5945                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5946                 print "</div>\n";
5947         }
5948         if ($extra) {
5949                 print "<div class=\"page_nav\">\n";
5950                 print "$extra\n";
5951                 print "</div>\n";
5952         }
5953 }
5954
5955 sub git_shortlog_body {
5956         # uses global variable $project
5957         my ($commitlist, $from, $to, $refs, $extra) = @_;
5958
5959         $from = 0 unless defined $from;
5960         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5961
5962         print "<table class=\"shortlog\">\n";
5963         my $alternate = 1;
5964         for (my $i = $from; $i <= $to; $i++) {
5965                 my %co = %{$commitlist->[$i]};
5966                 my $commit = $co{'id'};
5967                 my $ref = format_ref_marker($refs, $commit);
5968                 if ($alternate) {
5969                         print "<tr class=\"dark\">\n";
5970                 } else {
5971                         print "<tr class=\"light\">\n";
5972                 }
5973                 $alternate ^= 1;
5974                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5975                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5976                       format_author_html('td', \%co, 10) . "<td>";
5977                 print format_subject_html($co{'title'}, $co{'title_short'},
5978                                           href(action=>"commit", hash=>$commit), $ref);
5979                 print "</td>\n" .
5980                       "<td class=\"link\">" .
5981                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5982                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5983                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5984                 my $snapshot_links = format_snapshot_links($commit);
5985                 if (defined $snapshot_links) {
5986                         print " | " . $snapshot_links;
5987                 }
5988                 print "</td>\n" .
5989                       "</tr>\n";
5990         }
5991         if (defined $extra) {
5992                 print "<tr>\n" .
5993                       "<td colspan=\"4\">$extra</td>\n" .
5994                       "</tr>\n";
5995         }
5996         print "</table>\n";
5997 }
5998
5999 sub git_history_body {
6000         # Warning: assumes constant type (blob or tree) during history
6001         my ($commitlist, $from, $to, $refs, $extra,
6002             $file_name, $file_hash, $ftype) = @_;
6003
6004         $from = 0 unless defined $from;
6005         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
6006
6007         print "<table class=\"history\">\n";
6008         my $alternate = 1;
6009         for (my $i = $from; $i <= $to; $i++) {
6010                 my %co = %{$commitlist->[$i]};
6011                 if (!%co) {
6012                         next;
6013                 }
6014                 my $commit = $co{'id'};
6015
6016                 my $ref = format_ref_marker($refs, $commit);
6017
6018                 if ($alternate) {
6019                         print "<tr class=\"dark\">\n";
6020                 } else {
6021                         print "<tr class=\"light\">\n";
6022                 }
6023                 $alternate ^= 1;
6024                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6025         # shortlog:   format_author_html('td', \%co, 10)
6026                       format_author_html('td', \%co, 15, 3) . "<td>";
6027                 # originally git_history used chop_str($co{'title'}, 50)
6028                 print format_subject_html($co{'title'}, $co{'title_short'},
6029                                           href(action=>"commit", hash=>$commit), $ref);
6030                 print "</td>\n" .
6031                       "<td class=\"link\">" .
6032                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
6033                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
6034
6035                 if ($ftype eq 'blob') {
6036                         print " | " .
6037                               $cgi->a({-href => href(action=>"blob_plain", hash_base=>$commit, file_name=>$file_name)}, "raw");
6038
6039                         my $blob_current = $file_hash;
6040                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
6041                         if (defined $blob_current && defined $blob_parent &&
6042                                         $blob_current ne $blob_parent) {
6043                                 print " | " .
6044                                         $cgi->a({-href => href(action=>"blobdiff",
6045                                                                hash=>$blob_current, hash_parent=>$blob_parent,
6046                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
6047                                                                file_name=>$file_name)},
6048                                                 "diff to current");
6049                         }
6050                 }
6051                 print "</td>\n" .
6052                       "</tr>\n";
6053         }
6054         if (defined $extra) {
6055                 print "<tr>\n" .
6056                       "<td colspan=\"4\">$extra</td>\n" .
6057                       "</tr>\n";
6058         }
6059         print "</table>\n";
6060 }
6061
6062 sub git_tags_body {
6063         # uses global variable $project
6064         my ($taglist, $from, $to, $extra) = @_;
6065         $from = 0 unless defined $from;
6066         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
6067
6068         print "<table class=\"tags\">\n";
6069         my $alternate = 1;
6070         for (my $i = $from; $i <= $to; $i++) {
6071                 my $entry = $taglist->[$i];
6072                 my %tag = %$entry;
6073                 my $comment = $tag{'subject'};
6074                 my $comment_short;
6075                 if (defined $comment) {
6076                         $comment_short = chop_str($comment, 30, 5);
6077                 }
6078                 if ($alternate) {
6079                         print "<tr class=\"dark\">\n";
6080                 } else {
6081                         print "<tr class=\"light\">\n";
6082                 }
6083                 $alternate ^= 1;
6084                 if (defined $tag{'age'}) {
6085                         print "<td><i>$tag{'age'}</i></td>\n";
6086                 } else {
6087                         print "<td></td>\n";
6088                 }
6089                 print "<td>" .
6090                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
6091                                -class => "list name"}, esc_html($tag{'name'})) .
6092                       "</td>\n" .
6093                       "<td>";
6094                 if (defined $comment) {
6095                         print format_subject_html($comment, $comment_short,
6096                                                   href(action=>"tag", hash=>$tag{'id'}));
6097                 }
6098                 print "</td>\n" .
6099                       "<td class=\"selflink\">";
6100                 if ($tag{'type'} eq "tag") {
6101                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
6102                 } else {
6103                         print "&nbsp;";
6104                 }
6105                 print "</td>\n" .
6106                       "<td class=\"link\">" . " | " .
6107                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
6108                 if ($tag{'reftype'} eq "commit") {
6109                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
6110                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
6111                 } elsif ($tag{'reftype'} eq "blob") {
6112                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
6113                 }
6114                 print "</td>\n" .
6115                       "</tr>";
6116         }
6117         if (defined $extra) {
6118                 print "<tr>\n" .
6119                       "<td colspan=\"5\">$extra</td>\n" .
6120                       "</tr>\n";
6121         }
6122         print "</table>\n";
6123 }
6124
6125 sub git_heads_body {
6126         # uses global variable $project
6127         my ($headlist, $head_at, $from, $to, $extra) = @_;
6128         $from = 0 unless defined $from;
6129         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
6130
6131         print "<table class=\"heads\">\n";
6132         my $alternate = 1;
6133         for (my $i = $from; $i <= $to; $i++) {
6134                 my $entry = $headlist->[$i];
6135                 my %ref = %$entry;
6136                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
6137                 if ($alternate) {
6138                         print "<tr class=\"dark\">\n";
6139                 } else {
6140                         print "<tr class=\"light\">\n";
6141                 }
6142                 $alternate ^= 1;
6143                 print "<td><i>$ref{'age'}</i></td>\n" .
6144                       ($curr ? "<td class=\"current_head\">" : "<td>") .
6145                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
6146                                -class => "list name"},esc_html($ref{'name'})) .
6147                       "</td>\n" .
6148                       "<td class=\"link\">" .
6149                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
6150                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
6151                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
6152                       "</td>\n" .
6153                       "</tr>";
6154         }
6155         if (defined $extra) {
6156                 print "<tr>\n" .
6157                       "<td colspan=\"3\">$extra</td>\n" .
6158                       "</tr>\n";
6159         }
6160         print "</table>\n";
6161 }
6162
6163 # Display a single remote block
6164 sub git_remote_block {
6165         my ($remote, $rdata, $limit, $head) = @_;
6166
6167         my $heads = $rdata->{'heads'};
6168         my $fetch = $rdata->{'fetch'};
6169         my $push = $rdata->{'push'};
6170
6171         my $urls_table = "<table class=\"projects_list\">\n" ;
6172
6173         if (defined $fetch) {
6174                 if ($fetch eq $push) {
6175                         $urls_table .= format_repo_url("URL", $fetch);
6176                 } else {
6177                         $urls_table .= format_repo_url("Fetch URL", $fetch);
6178                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
6179                 }
6180         } elsif (defined $push) {
6181                 $urls_table .= format_repo_url("Push URL", $push);
6182         } else {
6183                 $urls_table .= format_repo_url("", "No remote URL");
6184         }
6185
6186         $urls_table .= "</table>\n";
6187
6188         my $dots;
6189         if (defined $limit && $limit < @$heads) {
6190                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6191         }
6192
6193         print $urls_table;
6194         git_heads_body($heads, $head, 0, $limit, $dots);
6195 }
6196
6197 # Display a list of remote names with the respective fetch and push URLs
6198 sub git_remotes_list {
6199         my ($remotedata, $limit) = @_;
6200         print "<table class=\"heads\">\n";
6201         my $alternate = 1;
6202         my @remotes = sort keys %$remotedata;
6203
6204         my $limited = $limit && $limit < @remotes;
6205
6206         $#remotes = $limit - 1 if $limited;
6207
6208         while (my $remote = shift @remotes) {
6209                 my $rdata = $remotedata->{$remote};
6210                 my $fetch = $rdata->{'fetch'};
6211                 my $push = $rdata->{'push'};
6212                 if ($alternate) {
6213                         print "<tr class=\"dark\">\n";
6214                 } else {
6215                         print "<tr class=\"light\">\n";
6216                 }
6217                 $alternate ^= 1;
6218                 print "<td>" .
6219                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6220                                -class=> "list name"},esc_html($remote)) .
6221                       "</td>";
6222                 print "<td class=\"link\">" .
6223                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6224                       " | " .
6225                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6226                       "</td>";
6227
6228                 print "</tr>\n";
6229         }
6230
6231         if ($limited) {
6232                 print "<tr>\n" .
6233                       "<td colspan=\"3\">" .
6234                       $cgi->a({-href => href(action=>"remotes")}, "...") .
6235                       "</td>\n" . "</tr>\n";
6236         }
6237
6238         print "</table>";
6239 }
6240
6241 # Display remote heads grouped by remote, unless there are too many
6242 # remotes, in which case we only display the remote names
6243 sub git_remotes_body {
6244         my ($remotedata, $limit, $head) = @_;
6245         if ($limit and $limit < keys %$remotedata) {
6246                 git_remotes_list($remotedata, $limit);
6247         } else {
6248                 fill_remote_heads($remotedata);
6249                 while (my ($remote, $rdata) = each %$remotedata) {
6250                         git_print_section({-class=>"remote", -id=>$remote},
6251                                 ["remotes", $remote, $remote], sub {
6252                                         git_remote_block($remote, $rdata, $limit, $head);
6253                                 });
6254                 }
6255         }
6256 }
6257
6258 sub git_search_message {
6259         my %co = @_;
6260
6261         my $greptype;
6262         if ($searchtype eq 'commit') {
6263                 $greptype = "--grep=";
6264         } elsif ($searchtype eq 'author') {
6265                 $greptype = "--author=";
6266         } elsif ($searchtype eq 'committer') {
6267                 $greptype = "--committer=";
6268         }
6269         $greptype .= $searchtext;
6270         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6271                                        $greptype, '--regexp-ignore-case',
6272                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6273
6274         my $paging_nav = '';
6275         if ($page > 0) {
6276                 $paging_nav .=
6277                         $cgi->a({-href => href(-replay=>1, page=>undef)},
6278                                 "first") .
6279                         " &sdot; " .
6280                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6281                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6282         } else {
6283                 $paging_nav .= "first &sdot; prev";
6284         }
6285         my $next_link = '';
6286         if ($#commitlist >= 100) {
6287                 $next_link =
6288                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6289                                  -accesskey => "n", -title => "Alt-n"}, "next");
6290                 $paging_nav .= " &sdot; $next_link";
6291         } else {
6292                 $paging_nav .= " &sdot; next";
6293         }
6294
6295         git_header_html();
6296
6297         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6298         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6299         if ($page == 0 && !@commitlist) {
6300                 print "<p>No match.</p>\n";
6301         } else {
6302                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6303         }
6304
6305         git_footer_html();
6306 }
6307
6308 sub git_search_changes {
6309         my %co = @_;
6310
6311         local $/ = "\n";
6312         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6313                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6314                 ($search_use_regexp ? '--pickaxe-regex' : ())
6315                         or die_error(500, "Open git-log failed");
6316
6317         git_header_html();
6318
6319         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6320         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6321
6322         print "<table class=\"pickaxe search\">\n";
6323         my $alternate = 1;
6324         undef %co;
6325         my @files;
6326         while (my $line = <$fd>) {
6327                 chomp $line;
6328                 next unless $line;
6329
6330                 my %set = parse_difftree_raw_line($line);
6331                 if (defined $set{'commit'}) {
6332                         # finish previous commit
6333                         if (%co) {
6334                                 print "</td>\n" .
6335                                       "<td class=\"link\">" .
6336                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6337                                               "commit") .
6338                                       " | " .
6339                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6340                                                              hash_base=>$co{'id'})},
6341                                               "tree") .
6342                                       "</td>\n" .
6343                                       "</tr>\n";
6344                         }
6345
6346                         if ($alternate) {
6347                                 print "<tr class=\"dark\">\n";
6348                         } else {
6349                                 print "<tr class=\"light\">\n";
6350                         }
6351                         $alternate ^= 1;
6352                         %co = parse_commit($set{'commit'});
6353                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6354                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6355                               "<td><i>$author</i></td>\n" .
6356                               "<td>" .
6357                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6358                                       -class => "list subject"},
6359                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6360                 } elsif (defined $set{'to_id'}) {
6361                         next if is_deleted(\%set);
6362
6363                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6364                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6365                                       -class => "list"},
6366                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6367                               "<br/>\n";
6368                 }
6369         }
6370         close $fd;
6371
6372         # finish last commit (warning: repetition!)
6373         if (%co) {
6374                 print "</td>\n" .
6375                       "<td class=\"link\">" .
6376                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6377                               "commit") .
6378                       " | " .
6379                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6380                                              hash_base=>$co{'id'})},
6381                               "tree") .
6382                       "</td>\n" .
6383                       "</tr>\n";
6384         }
6385
6386         print "</table>\n";
6387
6388         git_footer_html();
6389 }
6390
6391 sub git_search_files {
6392         my %co = @_;
6393
6394         local $/ = "\n";
6395         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6396                 $search_use_regexp ? ('-E', '-i') : '-F',
6397                 $searchtext, $co{'tree'}
6398                         or die_error(500, "Open git-grep failed");
6399
6400         git_header_html();
6401
6402         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6403         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6404
6405         print "<table class=\"grep_search\">\n";
6406         my $alternate = 1;
6407         my $matches = 0;
6408         my $lastfile = '';
6409         my $file_href;
6410         while (my $line = <$fd>) {
6411                 chomp $line;
6412                 my ($file, $lno, $ltext, $binary);
6413                 last if ($matches++ > 1000);
6414                 if ($line =~ /^Binary file (.+) matches$/) {
6415                         $file = $1;
6416                         $binary = 1;
6417                 } else {
6418                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6419                         $file =~ s/^$co{'tree'}://;
6420                 }
6421                 if ($file ne $lastfile) {
6422                         $lastfile and print "</td></tr>\n";
6423                         if ($alternate++) {
6424                                 print "<tr class=\"dark\">\n";
6425                         } else {
6426                                 print "<tr class=\"light\">\n";
6427                         }
6428                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6429                                           file_name=>$file);
6430                         print "<td class=\"list\">".
6431                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6432                         print "</td><td>\n";
6433                         $lastfile = $file;
6434                 }
6435                 if ($binary) {
6436                         print "<div class=\"binary\">Binary file</div>\n";
6437                 } else {
6438                         $ltext = untabify($ltext);
6439                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6440                                 $ltext = esc_html($1, -nbsp=>1);
6441                                 $ltext .= '<span class="match">';
6442                                 $ltext .= esc_html($2, -nbsp=>1);
6443                                 $ltext .= '</span>';
6444                                 $ltext .= esc_html($3, -nbsp=>1);
6445                         } else {
6446                                 $ltext = esc_html($ltext, -nbsp=>1);
6447                         }
6448                         print "<div class=\"pre\">" .
6449                                 $cgi->a({-href => $file_href.'#l'.$lno,
6450                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6451                                 ' ' .  $ltext . "</div>\n";
6452                 }
6453         }
6454         if ($lastfile) {
6455                 print "</td></tr>\n";
6456                 if ($matches > 1000) {
6457                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6458                 }
6459         } else {
6460                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6461         }
6462         close $fd;
6463
6464         print "</table>\n";
6465
6466         git_footer_html();
6467 }
6468
6469 sub git_search_grep_body {
6470         my ($commitlist, $from, $to, $extra) = @_;
6471         $from = 0 unless defined $from;
6472         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6473
6474         print "<table class=\"commit_search\">\n";
6475         my $alternate = 1;
6476         for (my $i = $from; $i <= $to; $i++) {
6477                 my %co = %{$commitlist->[$i]};
6478                 if (!%co) {
6479                         next;
6480                 }
6481                 my $commit = $co{'id'};
6482                 if ($alternate) {
6483                         print "<tr class=\"dark\">\n";
6484                 } else {
6485                         print "<tr class=\"light\">\n";
6486                 }
6487                 $alternate ^= 1;
6488                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6489                       format_author_html('td', \%co, 15, 5) .
6490                       "<td>" .
6491                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6492                                -class => "list subject"},
6493                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6494                 my $comment = $co{'comment'};
6495                 foreach my $line (@$comment) {
6496                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6497                                 my ($lead, $match, $trail) = ($1, $2, $3);
6498                                 $match = chop_str($match, 70, 5, 'center');
6499                                 my $contextlen = int((80 - length($match))/2);
6500                                 $contextlen = 30 if ($contextlen > 30);
6501                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6502                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6503
6504                                 $lead  = esc_html($lead);
6505                                 $match = esc_html($match);
6506                                 $trail = esc_html($trail);
6507
6508                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6509                         }
6510                 }
6511                 print "</td>\n" .
6512                       "<td class=\"link\">" .
6513                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6514                       " | " .
6515                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6516                       " | " .
6517                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6518                 print "</td>\n" .
6519                       "</tr>\n";
6520         }
6521         if (defined $extra) {
6522                 print "<tr>\n" .
6523                       "<td colspan=\"3\">$extra</td>\n" .
6524                       "</tr>\n";
6525         }
6526         print "</table>\n";
6527 }
6528
6529 ## ======================================================================
6530 ## ======================================================================
6531 ## actions
6532
6533 sub git_project_list {
6534         my $order = $input_params{'order'};
6535         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6536                 die_error(400, "Unknown order parameter");
6537         }
6538
6539         my @list = git_get_projects_list($project_filter, $strict_export);
6540         if (!@list) {
6541                 die_error(404, "No projects found");
6542         }
6543
6544         git_header_html();
6545         if (defined $home_text && -f $home_text) {
6546                 print "<div class=\"index_include\">\n";
6547                 insert_file($home_text);
6548                 print "</div>\n";
6549         }
6550
6551         git_project_search_form($searchtext, $search_use_regexp);
6552         git_project_list_body(\@list, $order);
6553         git_footer_html();
6554 }
6555
6556 sub git_forks {
6557         my $order = $input_params{'order'};
6558         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6559                 die_error(400, "Unknown order parameter");
6560         }
6561
6562         my $filter = $project;
6563         $filter =~ s/\.git$//;
6564         my @list = git_get_projects_list($filter);
6565         if (!@list) {
6566                 die_error(404, "No forks found");
6567         }
6568
6569         git_header_html();
6570         git_print_page_nav('','');
6571         git_print_header_div('summary', "$project forks");
6572         git_project_list_body(\@list, $order);
6573         git_footer_html();
6574 }
6575
6576 sub git_project_index {
6577         my @projects = git_get_projects_list($project_filter, $strict_export);
6578         if (!@projects) {
6579                 die_error(404, "No projects found");
6580         }
6581
6582         print $cgi->header(
6583                 -type => 'text/plain',
6584                 -charset => 'utf-8',
6585                 -content_disposition => 'inline; filename="index.aux"');
6586
6587         foreach my $pr (@projects) {
6588                 if (!exists $pr->{'owner'}) {
6589                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6590                 }
6591
6592                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6593                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6594                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6595                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6596                 $path  =~ s/ /\+/g;
6597                 $owner =~ s/ /\+/g;
6598
6599                 print "$path $owner\n";
6600         }
6601 }
6602
6603 sub git_summary {
6604         my $descr = git_get_project_description($project) || "none";
6605         my %co = parse_commit("HEAD");
6606         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6607         my $head = $co{'id'};
6608         my $remote_heads = gitweb_check_feature('remote_heads');
6609
6610         my $owner = git_get_project_owner($project);
6611
6612         my $refs = git_get_references();
6613         # These get_*_list functions return one more to allow us to see if
6614         # there are more ...
6615         my @taglist  = git_get_tags_list(16);
6616         my @headlist = git_get_heads_list(16);
6617         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6618         my @forklist;
6619         my $check_forks = gitweb_check_feature('forks');
6620
6621         if ($check_forks) {
6622                 # find forks of a project
6623                 my $filter = $project;
6624                 $filter =~ s/\.git$//;
6625                 @forklist = git_get_projects_list($filter);
6626                 # filter out forks of forks
6627                 @forklist = filter_forks_from_projects_list(\@forklist)
6628                         if (@forklist);
6629         }
6630
6631         git_header_html();
6632         git_print_page_nav('summary','', $head);
6633
6634         print "<div class=\"title\">&nbsp;</div>\n";
6635         print "<table class=\"projects_list\">\n" .
6636               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6637         if ($owner and not $omit_owner) {
6638                 print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6639         }
6640         if (defined $cd{'rfc2822'}) {
6641                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6642                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6643         }
6644
6645         # use per project git URL list in $projectroot/$project/cloneurl
6646         # or make project git URL from git base URL and project name
6647         my $url_tag = "URL";
6648         my @url_list = git_get_project_url_list($project);
6649         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6650         foreach my $git_url (@url_list) {
6651                 next unless $git_url;
6652                 print format_repo_url($url_tag, $git_url);
6653                 $url_tag = "";
6654         }
6655
6656         # Tag cloud
6657         my $show_ctags = gitweb_check_feature('ctags');
6658         if ($show_ctags) {
6659                 my $ctags = git_get_project_ctags($project);
6660                 if (%$ctags) {
6661                         # without ability to add tags, don't show if there are none
6662                         my $cloud = git_populate_project_tagcloud($ctags);
6663                         print "<tr id=\"metadata_ctags\">" .
6664                               "<td>content tags</td>" .
6665                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6666                               "</tr>\n";
6667                 }
6668         }
6669
6670         print "</table>\n";
6671
6672         # If XSS prevention is on, we don't include README.html.
6673         # TODO: Allow a readme in some safe format.
6674         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6675                 print "<div class=\"title\">readme</div>\n" .
6676                       "<div class=\"readme\">\n";
6677                 insert_file("$projectroot/$project/README.html");
6678                 print "\n</div>\n"; # class="readme"
6679         }
6680
6681         # we need to request one more than 16 (0..15) to check if
6682         # those 16 are all
6683         my @commitlist = $head ? parse_commits($head, 17) : ();
6684         if (@commitlist) {
6685                 git_print_header_div('shortlog');
6686                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6687                                   $#commitlist <=  15 ? undef :
6688                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6689         }
6690
6691         if (@taglist) {
6692                 git_print_header_div('tags');
6693                 git_tags_body(\@taglist, 0, 15,
6694                               $#taglist <=  15 ? undef :
6695                               $cgi->a({-href => href(action=>"tags")}, "..."));
6696         }
6697
6698         if (@headlist) {
6699                 git_print_header_div('heads');
6700                 git_heads_body(\@headlist, $head, 0, 15,
6701                                $#headlist <= 15 ? undef :
6702                                $cgi->a({-href => href(action=>"heads")}, "..."));
6703         }
6704
6705         if (%remotedata) {
6706                 git_print_header_div('remotes');
6707                 git_remotes_body(\%remotedata, 15, $head);
6708         }
6709
6710         if (@forklist) {
6711                 git_print_header_div('forks');
6712                 git_project_list_body(\@forklist, 'age', 0, 15,
6713                                       $#forklist <= 15 ? undef :
6714                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6715                                       'no_header');
6716         }
6717
6718         git_footer_html();
6719 }
6720
6721 sub git_tag {
6722         my %tag = parse_tag($hash);
6723
6724         if (! %tag) {
6725                 die_error(404, "Unknown tag object");
6726         }
6727
6728         my $head = git_get_head_hash($project);
6729         git_header_html();
6730         git_print_page_nav('','', $head,undef,$head);
6731         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6732         print "<div class=\"title_text\">\n" .
6733               "<table class=\"object_header\">\n" .
6734               "<tr>\n" .
6735               "<td>object</td>\n" .
6736               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6737                                $tag{'object'}) . "</td>\n" .
6738               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6739                                               $tag{'type'}) . "</td>\n" .
6740               "</tr>\n";
6741         if (defined($tag{'author'})) {
6742                 git_print_authorship_rows(\%tag, 'author');
6743         }
6744         print "</table>\n\n" .
6745               "</div>\n";
6746         print "<div class=\"page_body\">";
6747         my $comment = $tag{'comment'};
6748         foreach my $line (@$comment) {
6749                 chomp $line;
6750                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6751         }
6752         print "</div>\n";
6753         git_footer_html();
6754 }
6755
6756 sub git_blame_common {
6757         my $format = shift || 'porcelain';
6758         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6759                 $format = 'incremental';
6760                 $action = 'blame_incremental'; # for page title etc
6761         }
6762
6763         # permissions
6764         gitweb_check_feature('blame')
6765                 or die_error(403, "Blame view not allowed");
6766
6767         # error checking
6768         die_error(400, "No file name given") unless $file_name;
6769         $hash_base ||= git_get_head_hash($project);
6770         die_error(404, "Couldn't find base commit") unless $hash_base;
6771         my %co = parse_commit($hash_base)
6772                 or die_error(404, "Commit not found");
6773         my $ftype = "blob";
6774         if (!defined $hash) {
6775                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6776                         or die_error(404, "Error looking up file");
6777         } else {
6778                 $ftype = git_get_type($hash);
6779                 if ($ftype !~ "blob") {
6780                         die_error(400, "Object is not a blob");
6781                 }
6782         }
6783
6784         my $fd;
6785         if ($format eq 'incremental') {
6786                 # get file contents (as base)
6787                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6788                         or die_error(500, "Open git-cat-file failed");
6789         } elsif ($format eq 'data') {
6790                 # run git-blame --incremental
6791                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6792                         $hash_base, "--", $file_name
6793                         or die_error(500, "Open git-blame --incremental failed");
6794         } else {
6795                 # run git-blame --porcelain
6796                 open $fd, "-|", git_cmd(), "blame", '-p',
6797                         $hash_base, '--', $file_name
6798                         or die_error(500, "Open git-blame --porcelain failed");
6799         }
6800         binmode $fd, ':utf8';
6801
6802         # incremental blame data returns early
6803         if ($format eq 'data') {
6804                 print $cgi->header(
6805                         -type=>"text/plain", -charset => "utf-8",
6806                         -status=> "200 OK");
6807                 local $| = 1; # output autoflush
6808                 while (my $line = <$fd>) {
6809                         print to_utf8($line);
6810                 }
6811                 close $fd
6812                         or print "ERROR $!\n";
6813
6814                 print 'END';
6815                 if (defined $t0 && gitweb_check_feature('timed')) {
6816                         print ' '.
6817                               tv_interval($t0, [ gettimeofday() ]).
6818                               ' '.$number_of_git_cmds;
6819                 }
6820                 print "\n";
6821
6822                 return;
6823         }
6824
6825         # page header
6826         git_header_html();
6827         my $formats_nav =
6828                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6829                         "blob") .
6830                 " | ";
6831         if ($format eq 'incremental') {
6832                 $formats_nav .=
6833                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6834                                 "blame") . " (non-incremental)";
6835         } else {
6836                 $formats_nav .=
6837                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6838                                 "blame") . " (incremental)";
6839         }
6840         $formats_nav .=
6841                 " | " .
6842                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6843                         "history") .
6844                 " | " .
6845                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6846                         "HEAD");
6847         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6848         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6849         git_print_page_path($file_name, $ftype, $hash_base);
6850
6851         # page body
6852         if ($format eq 'incremental') {
6853                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6854                       "This page requires JavaScript to run.\n Use ".
6855                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6856                               'this page').
6857                       " instead.\n".
6858                       "</b></center></div>\n</noscript>\n";
6859
6860                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6861         }
6862
6863         print qq!<div class="page_body">\n!;
6864         print qq!<div id="progress_info">... / ...</div>\n!
6865                 if ($format eq 'incremental');
6866         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6867               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6868               qq!<thead>\n!.
6869               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6870               qq!</thead>\n!.
6871               qq!<tbody>\n!;
6872
6873         my @rev_color = qw(light dark);
6874         my $num_colors = scalar(@rev_color);
6875         my $current_color = 0;
6876
6877         if ($format eq 'incremental') {
6878                 my $color_class = $rev_color[$current_color];
6879
6880                 #contents of a file
6881                 my $linenr = 0;
6882         LINE:
6883                 while (my $line = <$fd>) {
6884                         chomp $line;
6885                         $linenr++;
6886
6887                         print qq!<tr id="l$linenr" class="$color_class">!.
6888                               qq!<td class="sha1"><a href=""> </a></td>!.
6889                               qq!<td class="linenr">!.
6890                               qq!<a class="linenr" href="">$linenr</a></td>!;
6891                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6892                         print qq!</tr>\n!;
6893                 }
6894
6895         } else { # porcelain, i.e. ordinary blame
6896                 my %metainfo = (); # saves information about commits
6897
6898                 # blame data
6899         LINE:
6900                 while (my $line = <$fd>) {
6901                         chomp $line;
6902                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6903                         # no <lines in group> for subsequent lines in group of lines
6904                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6905                            ($line =~ /^($oid_regex) (\d+) (\d+)(?: (\d+))?$/);
6906                         if (!exists $metainfo{$full_rev}) {
6907                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6908                         }
6909                         my $meta = $metainfo{$full_rev};
6910                         my $data;
6911                         while ($data = <$fd>) {
6912                                 chomp $data;
6913                                 last if ($data =~ s/^\t//); # contents of line
6914                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6915                                         $meta->{$1} = $2 unless exists $meta->{$1};
6916                                 }
6917                                 if ($data =~ /^previous /) {
6918                                         $meta->{'nprevious'}++;
6919                                 }
6920                         }
6921                         my $short_rev = substr($full_rev, 0, 8);
6922                         my $author = $meta->{'author'};
6923                         my %date =
6924                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6925                         my $date = $date{'iso-tz'};
6926                         if ($group_size) {
6927                                 $current_color = ($current_color + 1) % $num_colors;
6928                         }
6929                         my $tr_class = $rev_color[$current_color];
6930                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6931                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6932                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6933                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6934                         if ($group_size) {
6935                                 print "<td class=\"sha1\"";
6936                                 print " title=\"". esc_html($author) . ", $date\"";
6937                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6938                                 print ">";
6939                                 print $cgi->a({-href => href(action=>"commit",
6940                                                              hash=>$full_rev,
6941                                                              file_name=>$file_name)},
6942                                               esc_html($short_rev));
6943                                 if ($group_size >= 2) {
6944                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6945                                         if (@author_initials) {
6946                                                 print "<br />" .
6947                                                       esc_html(join('', @author_initials));
6948                                                 #           or join('.', ...)
6949                                         }
6950                                 }
6951                                 print "</td>\n";
6952                         }
6953                         # 'previous' <sha1 of parent commit> <filename at commit>
6954                         if (exists $meta->{'previous'} &&
6955                             $meta->{'previous'} =~ /^($oid_regex) (.*)$/) {
6956                                 $meta->{'parent'} = $1;
6957                                 $meta->{'file_parent'} = unquote($2);
6958                         }
6959                         my $linenr_commit =
6960                                 exists($meta->{'parent'}) ?
6961                                 $meta->{'parent'} : $full_rev;
6962                         my $linenr_filename =
6963                                 exists($meta->{'file_parent'}) ?
6964                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6965                         my $blamed = href(action => 'blame',
6966                                           file_name => $linenr_filename,
6967                                           hash_base => $linenr_commit);
6968                         print "<td class=\"linenr\">";
6969                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6970                                         -class => "linenr" },
6971                                       esc_html($lineno));
6972                         print "</td>";
6973                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6974                         print "</tr>\n";
6975                 } # end while
6976
6977         }
6978
6979         # footer
6980         print "</tbody>\n".
6981               "</table>\n"; # class="blame"
6982         print "</div>\n";   # class="blame_body"
6983         close $fd
6984                 or print "Reading blob failed\n";
6985
6986         git_footer_html();
6987 }
6988
6989 sub git_blame {
6990         git_blame_common();
6991 }
6992
6993 sub git_blame_incremental {
6994         git_blame_common('incremental');
6995 }
6996
6997 sub git_blame_data {
6998         git_blame_common('data');
6999 }
7000
7001 sub git_tags {
7002         my $head = git_get_head_hash($project);
7003         git_header_html();
7004         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
7005         git_print_header_div('summary', $project);
7006
7007         my @tagslist = git_get_tags_list();
7008         if (@tagslist) {
7009                 git_tags_body(\@tagslist);
7010         }
7011         git_footer_html();
7012 }
7013
7014 sub git_heads {
7015         my $head = git_get_head_hash($project);
7016         git_header_html();
7017         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
7018         git_print_header_div('summary', $project);
7019
7020         my @headslist = git_get_heads_list();
7021         if (@headslist) {
7022                 git_heads_body(\@headslist, $head);
7023         }
7024         git_footer_html();
7025 }
7026
7027 # used both for single remote view and for list of all the remotes
7028 sub git_remotes {
7029         gitweb_check_feature('remote_heads')
7030                 or die_error(403, "Remote heads view is disabled");
7031
7032         my $head = git_get_head_hash($project);
7033         my $remote = $input_params{'hash'};
7034
7035         my $remotedata = git_get_remotes_list($remote);
7036         die_error(500, "Unable to get remote information") unless defined $remotedata;
7037
7038         unless (%$remotedata) {
7039                 die_error(404, defined $remote ?
7040                         "Remote $remote not found" :
7041                         "No remotes found");
7042         }
7043
7044         git_header_html(undef, undef, -action_extra => $remote);
7045         git_print_page_nav('', '',  $head, undef, $head,
7046                 format_ref_views($remote ? '' : 'remotes'));
7047
7048         fill_remote_heads($remotedata);
7049         if (defined $remote) {
7050                 git_print_header_div('remotes', "$remote remote for $project");
7051                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
7052         } else {
7053                 git_print_header_div('summary', "$project remotes");
7054                 git_remotes_body($remotedata, undef, $head);
7055         }
7056
7057         git_footer_html();
7058 }
7059
7060 sub git_blob_plain {
7061         my $type = shift;
7062         my $expires;
7063
7064         if (!defined $hash) {
7065                 if (defined $file_name) {
7066                         my $base = $hash_base || git_get_head_hash($project);
7067                         $hash = git_get_hash_by_path($base, $file_name, "blob")
7068                                 or die_error(404, "Cannot find file");
7069                 } else {
7070                         die_error(400, "No file name defined");
7071                 }
7072         } elsif ($hash =~ m/^$oid_regex$/) {
7073                 # blobs defined by non-textual hash id's can be cached
7074                 $expires = "+1d";
7075         }
7076
7077         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
7078                 or die_error(500, "Open git-cat-file blob '$hash' failed");
7079
7080         # content-type (can include charset)
7081         $type = blob_contenttype($fd, $file_name, $type);
7082
7083         # "save as" filename, even when no $file_name is given
7084         my $save_as = "$hash";
7085         if (defined $file_name) {
7086                 $save_as = $file_name;
7087         } elsif ($type =~ m/^text\//) {
7088                 $save_as .= '.txt';
7089         }
7090
7091         # With XSS prevention on, blobs of all types except a few known safe
7092         # ones are served with "Content-Disposition: attachment" to make sure
7093         # they don't run in our security domain.  For certain image types,
7094         # blob view writes an <img> tag referring to blob_plain view, and we
7095         # want to be sure not to break that by serving the image as an
7096         # attachment (though Firefox 3 doesn't seem to care).
7097         my $sandbox = $prevent_xss &&
7098                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
7099
7100         # serve text/* as text/plain
7101         if ($prevent_xss &&
7102             ($type =~ m!^text/[a-z]+\b(.*)$! ||
7103              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
7104                 my $rest = $1;
7105                 $rest = defined $rest ? $rest : '';
7106                 $type = "text/plain$rest";
7107         }
7108
7109         print $cgi->header(
7110                 -type => $type,
7111                 -expires => $expires,
7112                 -content_disposition =>
7113                         ($sandbox ? 'attachment' : 'inline')
7114                         . '; filename="' . $save_as . '"');
7115         local $/ = undef;
7116         local *FCGI::Stream::PRINT = $FCGI_Stream_PRINT_raw;
7117         binmode STDOUT, ':raw';
7118         print <$fd>;
7119         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7120         close $fd;
7121 }
7122
7123 sub git_blob {
7124         my $expires;
7125
7126         if (!defined $hash) {
7127                 if (defined $file_name) {
7128                         my $base = $hash_base || git_get_head_hash($project);
7129                         $hash = git_get_hash_by_path($base, $file_name, "blob")
7130                                 or die_error(404, "Cannot find file");
7131                 } else {
7132                         die_error(400, "No file name defined");
7133                 }
7134         } elsif ($hash =~ m/^$oid_regex$/) {
7135                 # blobs defined by non-textual hash id's can be cached
7136                 $expires = "+1d";
7137         }
7138
7139         my $have_blame = gitweb_check_feature('blame');
7140         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
7141                 or die_error(500, "Couldn't cat $file_name, $hash");
7142         my $mimetype = blob_mimetype($fd, $file_name);
7143         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
7144         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
7145                 close $fd;
7146                 return git_blob_plain($mimetype);
7147         }
7148         # we can have blame only for text/* mimetype
7149         $have_blame &&= ($mimetype =~ m!^text/!);
7150
7151         my $highlight = gitweb_check_feature('highlight');
7152         my $syntax = guess_file_syntax($highlight, $file_name);
7153         $fd = run_highlighter($fd, $highlight, $syntax);
7154
7155         git_header_html(undef, $expires);
7156         my $formats_nav = '';
7157         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7158                 if (defined $file_name) {
7159                         if ($have_blame) {
7160                                 $formats_nav .=
7161                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
7162                                                 "blame") .
7163                                         " | ";
7164                         }
7165                         $formats_nav .=
7166                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7167                                         "history") .
7168                                 " | " .
7169                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7170                                         "raw") .
7171                                 " | " .
7172                                 $cgi->a({-href => href(action=>"blob",
7173                                                        hash_base=>"HEAD", file_name=>$file_name)},
7174                                         "HEAD");
7175                 } else {
7176                         $formats_nav .=
7177                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7178                                         "raw");
7179                 }
7180                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7181                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7182         } else {
7183                 print "<div class=\"page_nav\">\n" .
7184                       "<br/><br/></div>\n" .
7185                       "<div class=\"title\">".esc_html($hash)."</div>\n";
7186         }
7187         git_print_page_path($file_name, "blob", $hash_base);
7188         print "<div class=\"page_body\">\n";
7189         if ($mimetype =~ m!^image/!) {
7190                 print qq!<img class="blob" type="!.esc_attr($mimetype).qq!"!;
7191                 if ($file_name) {
7192                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7193                 }
7194                 print qq! src="! .
7195                       esc_attr(href(action=>"blob_plain", hash=>$hash,
7196                            hash_base=>$hash_base, file_name=>$file_name)) .
7197                       qq!" />\n!;
7198         } else {
7199                 my $nr;
7200                 while (my $line = <$fd>) {
7201                         chomp $line;
7202                         $nr++;
7203                         $line = untabify($line);
7204                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7205                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7206                                $highlight ? sanitize($line) : esc_html($line, -nbsp=>1);
7207                 }
7208         }
7209         close $fd
7210                 or print "Reading blob failed.\n";
7211         print "</div>";
7212         git_footer_html();
7213 }
7214
7215 sub git_tree {
7216         if (!defined $hash_base) {
7217                 $hash_base = "HEAD";
7218         }
7219         if (!defined $hash) {
7220                 if (defined $file_name) {
7221                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7222                 } else {
7223                         $hash = $hash_base;
7224                 }
7225         }
7226         die_error(404, "No such tree") unless defined($hash);
7227
7228         my $show_sizes = gitweb_check_feature('show-sizes');
7229         my $have_blame = gitweb_check_feature('blame');
7230
7231         my @entries = ();
7232         {
7233                 local $/ = "\0";
7234                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7235                         ($show_sizes ? '-l' : ()), @extra_options, $hash
7236                         or die_error(500, "Open git-ls-tree failed");
7237                 @entries = map { chomp; $_ } <$fd>;
7238                 close $fd
7239                         or die_error(404, "Reading tree failed");
7240         }
7241
7242         my $refs = git_get_references();
7243         my $ref = format_ref_marker($refs, $hash_base);
7244         git_header_html();
7245         my $basedir = '';
7246         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7247                 my @views_nav = ();
7248                 if (defined $file_name) {
7249                         push @views_nav,
7250                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7251                                         "history"),
7252                                 $cgi->a({-href => href(action=>"tree",
7253                                                        hash_base=>"HEAD", file_name=>$file_name)},
7254                                         "HEAD"),
7255                 }
7256                 my $snapshot_links = format_snapshot_links($hash);
7257                 if (defined $snapshot_links) {
7258                         # FIXME: Should be available when we have no hash base as well.
7259                         push @views_nav, $snapshot_links;
7260                 }
7261                 git_print_page_nav('tree','', $hash_base, undef, undef,
7262                                    join(' | ', @views_nav));
7263                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7264         } else {
7265                 undef $hash_base;
7266                 print "<div class=\"page_nav\">\n";
7267                 print "<br/><br/></div>\n";
7268                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7269         }
7270         if (defined $file_name) {
7271                 $basedir = $file_name;
7272                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7273                         $basedir .= '/';
7274                 }
7275                 git_print_page_path($file_name, 'tree', $hash_base);
7276         }
7277         print "<div class=\"page_body\">\n";
7278         print "<table class=\"tree\">\n";
7279         my $alternate = 1;
7280         # '..' (top directory) link if possible
7281         if (defined $hash_base &&
7282             defined $file_name && $file_name =~ m![^/]+$!) {
7283                 if ($alternate) {
7284                         print "<tr class=\"dark\">\n";
7285                 } else {
7286                         print "<tr class=\"light\">\n";
7287                 }
7288                 $alternate ^= 1;
7289
7290                 my $up = $file_name;
7291                 $up =~ s!/?[^/]+$!!;
7292                 undef $up unless $up;
7293                 # based on git_print_tree_entry
7294                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7295                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7296                 print '<td class="list">';
7297                 print $cgi->a({-href => href(action=>"tree",
7298                                              hash_base=>$hash_base,
7299                                              file_name=>$up)},
7300                               "..");
7301                 print "</td>\n";
7302                 print "<td class=\"link\"></td>\n";
7303
7304                 print "</tr>\n";
7305         }
7306         foreach my $line (@entries) {
7307                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7308
7309                 if ($alternate) {
7310                         print "<tr class=\"dark\">\n";
7311                 } else {
7312                         print "<tr class=\"light\">\n";
7313                 }
7314                 $alternate ^= 1;
7315
7316                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7317
7318                 print "</tr>\n";
7319         }
7320         print "</table>\n" .
7321               "</div>";
7322         git_footer_html();
7323 }
7324
7325 sub sanitize_for_filename {
7326     my $name = shift;
7327
7328     $name =~ s!/!-!g;
7329     $name =~ s/[^[:alnum:]_.-]//g;
7330
7331     return $name;
7332 }
7333
7334 sub snapshot_name {
7335         my ($project, $hash) = @_;
7336
7337         # path/to/project.git  -> project
7338         # path/to/project/.git -> project
7339         my $name = to_utf8($project);
7340         $name =~ s,([^/])/*\.git$,$1,;
7341         $name = sanitize_for_filename(basename($name));
7342
7343         my $ver = $hash;
7344         if ($hash =~ /^[0-9a-fA-F]+$/) {
7345                 # shorten SHA-1 hash
7346                 my $full_hash = git_get_full_hash($project, $hash);
7347                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7348                         $ver = git_get_short_hash($project, $hash);
7349                 }
7350         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7351                 # tags don't need shortened SHA-1 hash
7352                 $ver = $1;
7353         } else {
7354                 # branches and other need shortened SHA-1 hash
7355                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
7356                 if ($hash =~ m!^refs/($strip_refs|remotes)/(.*)$!) {
7357                         my $ref_dir = (defined $1) ? $1 : '';
7358                         $ver = $2;
7359
7360                         $ref_dir = sanitize_for_filename($ref_dir);
7361                         # for refs neither in heads nor remotes we want to
7362                         # add a ref dir to archive name
7363                         if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
7364                                 $ver = $ref_dir . '-' . $ver;
7365                         }
7366                 }
7367                 $ver .= '-' . git_get_short_hash($project, $hash);
7368         }
7369         # special case of sanitization for filename - we change
7370         # slashes to dots instead of dashes
7371         # in case of hierarchical branch names
7372         $ver =~ s!/!.!g;
7373         $ver =~ s/[^[:alnum:]_.-]//g;
7374
7375         # name = project-version_string
7376         $name = "$name-$ver";
7377
7378         return wantarray ? ($name, $name) : $name;
7379 }
7380
7381 sub exit_if_unmodified_since {
7382         my ($latest_epoch) = @_;
7383         our $cgi;
7384
7385         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7386         if (defined $if_modified) {
7387                 my $since;
7388                 if (eval { require HTTP::Date; 1; }) {
7389                         $since = HTTP::Date::str2time($if_modified);
7390                 } elsif (eval { require Time::ParseDate; 1; }) {
7391                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7392                 }
7393                 if (defined $since && $latest_epoch <= $since) {
7394                         my %latest_date = parse_date($latest_epoch);
7395                         print $cgi->header(
7396                                 -last_modified => $latest_date{'rfc2822'},
7397                                 -status => '304 Not Modified');
7398                         goto DONE_GITWEB;
7399                 }
7400         }
7401 }
7402
7403 sub git_snapshot {
7404         my $format = $input_params{'snapshot_format'};
7405         if (!@snapshot_fmts) {
7406                 die_error(403, "Snapshots not allowed");
7407         }
7408         # default to first supported snapshot format
7409         $format ||= $snapshot_fmts[0];
7410         if ($format !~ m/^[a-z0-9]+$/) {
7411                 die_error(400, "Invalid snapshot format parameter");
7412         } elsif (!exists($known_snapshot_formats{$format})) {
7413                 die_error(400, "Unknown snapshot format");
7414         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7415                 die_error(403, "Snapshot format not allowed");
7416         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7417                 die_error(403, "Unsupported snapshot format");
7418         }
7419
7420         my $type = git_get_type("$hash^{}");
7421         if (!$type) {
7422                 die_error(404, 'Object does not exist');
7423         }  elsif ($type eq 'blob') {
7424                 die_error(400, 'Object is not a tree-ish');
7425         }
7426
7427         my ($name, $prefix) = snapshot_name($project, $hash);
7428         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7429
7430         my %co = parse_commit($hash);
7431         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7432
7433         my $cmd = quote_command(
7434                 git_cmd(), 'archive',
7435                 "--format=$known_snapshot_formats{$format}{'format'}",
7436                 "--prefix=$prefix/", $hash);
7437         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7438                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7439         }
7440
7441         $filename =~ s/(["\\])/\\$1/g;
7442         my %latest_date;
7443         if (%co) {
7444                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7445         }
7446
7447         print $cgi->header(
7448                 -type => $known_snapshot_formats{$format}{'type'},
7449                 -content_disposition => 'inline; filename="' . $filename . '"',
7450                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7451                 -status => '200 OK');
7452
7453         open my $fd, "-|", $cmd
7454                 or die_error(500, "Execute git-archive failed");
7455         local *FCGI::Stream::PRINT = $FCGI_Stream_PRINT_raw;
7456         binmode STDOUT, ':raw';
7457         print <$fd>;
7458         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7459         close $fd;
7460 }
7461
7462 sub git_log_generic {
7463         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7464
7465         my $head = git_get_head_hash($project);
7466         if (!defined $base) {
7467                 $base = $head;
7468         }
7469         if (!defined $page) {
7470                 $page = 0;
7471         }
7472         my $refs = git_get_references();
7473
7474         my $commit_hash = $base;
7475         if (defined $parent) {
7476                 $commit_hash = "$parent..$base";
7477         }
7478         my @commitlist =
7479                 parse_commits($commit_hash, 101, (100 * $page),
7480                               defined $file_name ? ($file_name, "--full-history") : ());
7481
7482         my $ftype;
7483         if (!defined $file_hash && defined $file_name) {
7484                 # some commits could have deleted file in question,
7485                 # and not have it in tree, but one of them has to have it
7486                 for (my $i = 0; $i < @commitlist; $i++) {
7487                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7488                         last if defined $file_hash;
7489                 }
7490         }
7491         if (defined $file_hash) {
7492                 $ftype = git_get_type($file_hash);
7493         }
7494         if (defined $file_name && !defined $ftype) {
7495                 die_error(500, "Unknown type of object");
7496         }
7497         my %co;
7498         if (defined $file_name) {
7499                 %co = parse_commit($base)
7500                         or die_error(404, "Unknown commit object");
7501         }
7502
7503
7504         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7505         my $next_link = '';
7506         if ($#commitlist >= 100) {
7507                 $next_link =
7508                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7509                                  -accesskey => "n", -title => "Alt-n"}, "next");
7510         }
7511         my $patch_max = gitweb_get_feature('patches');
7512         if ($patch_max && !defined $file_name &&
7513                 !gitweb_check_feature('email-privacy')) {
7514                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7515                         $paging_nav .= " &sdot; " .
7516                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7517                                         "patches");
7518                 }
7519         }
7520
7521         git_header_html();
7522         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7523         if (defined $file_name) {
7524                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7525         } else {
7526                 git_print_header_div('summary', $project)
7527         }
7528         git_print_page_path($file_name, $ftype, $hash_base)
7529                 if (defined $file_name);
7530
7531         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7532                      $file_name, $file_hash, $ftype);
7533
7534         git_footer_html();
7535 }
7536
7537 sub git_log {
7538         git_log_generic('log', \&git_log_body,
7539                         $hash, $hash_parent);
7540 }
7541
7542 sub git_commit {
7543         $hash ||= $hash_base || "HEAD";
7544         my %co = parse_commit($hash)
7545             or die_error(404, "Unknown commit object");
7546
7547         my $parent  = $co{'parent'};
7548         my $parents = $co{'parents'}; # listref
7549
7550         # we need to prepare $formats_nav before any parameter munging
7551         my $formats_nav;
7552         if (!defined $parent) {
7553                 # --root commitdiff
7554                 $formats_nav .= '(initial)';
7555         } elsif (@$parents == 1) {
7556                 # single parent commit
7557                 $formats_nav .=
7558                         '(parent: ' .
7559                         $cgi->a({-href => href(action=>"commit",
7560                                                hash=>$parent)},
7561                                 esc_html(substr($parent, 0, 7))) .
7562                         ')';
7563         } else {
7564                 # merge commit
7565                 $formats_nav .=
7566                         '(merge: ' .
7567                         join(' ', map {
7568                                 $cgi->a({-href => href(action=>"commit",
7569                                                        hash=>$_)},
7570                                         esc_html(substr($_, 0, 7)));
7571                         } @$parents ) .
7572                         ')';
7573         }
7574         if (gitweb_check_feature('patches') && @$parents <= 1 &&
7575                 !gitweb_check_feature('email-privacy')) {
7576                 $formats_nav .= " | " .
7577                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7578                                 "patch");
7579         }
7580
7581         if (!defined $parent) {
7582                 $parent = "--root";
7583         }
7584         my @difftree;
7585         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7586                 @diff_opts,
7587                 (@$parents <= 1 ? $parent : '-c'),
7588                 $hash, "--"
7589                 or die_error(500, "Open git-diff-tree failed");
7590         @difftree = map { chomp; $_ } <$fd>;
7591         close $fd or die_error(404, "Reading git-diff-tree failed");
7592
7593         # non-textual hash id's can be cached
7594         my $expires;
7595         if ($hash =~ m/^$oid_regex$/) {
7596                 $expires = "+1d";
7597         }
7598         my $refs = git_get_references();
7599         my $ref = format_ref_marker($refs, $co{'id'});
7600
7601         git_header_html(undef, $expires);
7602         git_print_page_nav('commit', '',
7603                            $hash, $co{'tree'}, $hash,
7604                            $formats_nav);
7605
7606         if (defined $co{'parent'}) {
7607                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7608         } else {
7609                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7610         }
7611         print "<div class=\"title_text\">\n" .
7612               "<table class=\"object_header\">\n";
7613         git_print_authorship_rows(\%co);
7614         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7615         print "<tr>" .
7616               "<td>tree</td>" .
7617               "<td class=\"sha1\">" .
7618               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7619                        class => "list"}, $co{'tree'}) .
7620               "</td>" .
7621               "<td class=\"link\">" .
7622               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7623                       "tree");
7624         my $snapshot_links = format_snapshot_links($hash);
7625         if (defined $snapshot_links) {
7626                 print " | " . $snapshot_links;
7627         }
7628         print "</td>" .
7629               "</tr>\n";
7630
7631         foreach my $par (@$parents) {
7632                 print "<tr>" .
7633                       "<td>parent</td>" .
7634                       "<td class=\"sha1\">" .
7635                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7636                                class => "list"}, $par) .
7637                       "</td>" .
7638                       "<td class=\"link\">" .
7639                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7640                       " | " .
7641                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7642                       "</td>" .
7643                       "</tr>\n";
7644         }
7645         print "</table>".
7646               "</div>\n";
7647
7648         print "<div class=\"page_body\">\n";
7649         git_print_log($co{'comment'});
7650         print "</div>\n";
7651
7652         git_difftree_body(\@difftree, $hash, @$parents);
7653
7654         git_footer_html();
7655 }
7656
7657 sub git_object {
7658         # object is defined by:
7659         # - hash or hash_base alone
7660         # - hash_base and file_name
7661         my $type;
7662
7663         # - hash or hash_base alone
7664         if ($hash || ($hash_base && !defined $file_name)) {
7665                 my $object_id = $hash || $hash_base;
7666
7667                 open my $fd, "-|", quote_command(
7668                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7669                         or die_error(404, "Object does not exist");
7670                 $type = <$fd>;
7671                 defined $type && chomp $type;
7672                 close $fd
7673                         or die_error(404, "Object does not exist");
7674
7675         # - hash_base and file_name
7676         } elsif ($hash_base && defined $file_name) {
7677                 $file_name =~ s,/+$,,;
7678
7679                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7680                         or die_error(404, "Base object does not exist");
7681
7682                 # here errors should not happen
7683                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7684                         or die_error(500, "Open git-ls-tree failed");
7685                 my $line = <$fd>;
7686                 close $fd;
7687
7688                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7689                 unless ($line && $line =~ m/^([0-9]+) (.+) ($oid_regex)\t/) {
7690                         die_error(404, "File or directory for given base does not exist");
7691                 }
7692                 $type = $2;
7693                 $hash = $3;
7694         } else {
7695                 die_error(400, "Not enough information to find object");
7696         }
7697
7698         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7699                                           hash=>$hash, hash_base=>$hash_base,
7700                                           file_name=>$file_name),
7701                              -status => '302 Found');
7702 }
7703
7704 sub git_blobdiff {
7705         my $format = shift || 'html';
7706         my $diff_style = $input_params{'diff_style'} || 'inline';
7707
7708         my $fd;
7709         my @difftree;
7710         my %diffinfo;
7711         my $expires;
7712
7713         # preparing $fd and %diffinfo for git_patchset_body
7714         # new style URI
7715         if (defined $hash_base && defined $hash_parent_base) {
7716                 if (defined $file_name) {
7717                         # read raw output
7718                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7719                                 $hash_parent_base, $hash_base,
7720                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7721                                 or die_error(500, "Open git-diff-tree failed");
7722                         @difftree = map { chomp; $_ } <$fd>;
7723                         close $fd
7724                                 or die_error(404, "Reading git-diff-tree failed");
7725                         @difftree
7726                                 or die_error(404, "Blob diff not found");
7727
7728                 } elsif (defined $hash &&
7729                          $hash =~ $oid_regex) {
7730                         # try to find filename from $hash
7731
7732                         # read filtered raw output
7733                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7734                                 $hash_parent_base, $hash_base, "--"
7735                                 or die_error(500, "Open git-diff-tree failed");
7736                         @difftree =
7737                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7738                                 # $hash == to_id
7739                                 grep { /^:[0-7]{6} [0-7]{6} $oid_regex $hash/ }
7740                                 map { chomp; $_ } <$fd>;
7741                         close $fd
7742                                 or die_error(404, "Reading git-diff-tree failed");
7743                         @difftree
7744                                 or die_error(404, "Blob diff not found");
7745
7746                 } else {
7747                         die_error(400, "Missing one of the blob diff parameters");
7748                 }
7749
7750                 if (@difftree > 1) {
7751                         die_error(400, "Ambiguous blob diff specification");
7752                 }
7753
7754                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7755                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7756                 $file_name   ||= $diffinfo{'to_file'};
7757
7758                 $hash_parent ||= $diffinfo{'from_id'};
7759                 $hash        ||= $diffinfo{'to_id'};
7760
7761                 # non-textual hash id's can be cached
7762                 if ($hash_base =~ m/^$oid_regex$/ &&
7763                     $hash_parent_base =~ m/^$oid_regex$/) {
7764                         $expires = '+1d';
7765                 }
7766
7767                 # open patch output
7768                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7769                         '-p', ($format eq 'html' ? "--full-index" : ()),
7770                         $hash_parent_base, $hash_base,
7771                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7772                         or die_error(500, "Open git-diff-tree failed");
7773         }
7774
7775         # old/legacy style URI -- not generated anymore since 1.4.3.
7776         if (!%diffinfo) {
7777                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7778         }
7779
7780         # header
7781         if ($format eq 'html') {
7782                 my $formats_nav =
7783                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7784                                 "raw");
7785                 $formats_nav .= diff_style_nav($diff_style);
7786                 git_header_html(undef, $expires);
7787                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7788                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7789                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7790                 } else {
7791                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7792                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7793                 }
7794                 if (defined $file_name) {
7795                         git_print_page_path($file_name, "blob", $hash_base);
7796                 } else {
7797                         print "<div class=\"page_path\"></div>\n";
7798                 }
7799
7800         } elsif ($format eq 'plain') {
7801                 print $cgi->header(
7802                         -type => 'text/plain',
7803                         -charset => 'utf-8',
7804                         -expires => $expires,
7805                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7806
7807                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7808
7809         } else {
7810                 die_error(400, "Unknown blobdiff format");
7811         }
7812
7813         # patch
7814         if ($format eq 'html') {
7815                 print "<div class=\"page_body\">\n";
7816
7817                 git_patchset_body($fd, $diff_style,
7818                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7819                 close $fd;
7820
7821                 print "</div>\n"; # class="page_body"
7822                 git_footer_html();
7823
7824         } else {
7825                 while (my $line = <$fd>) {
7826                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7827                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7828
7829                         print $line;
7830
7831                         last if $line =~ m!^\+\+\+!;
7832                 }
7833                 local $/ = undef;
7834                 print <$fd>;
7835                 close $fd;
7836         }
7837 }
7838
7839 sub git_blobdiff_plain {
7840         git_blobdiff('plain');
7841 }
7842
7843 # assumes that it is added as later part of already existing navigation,
7844 # so it returns "| foo | bar" rather than just "foo | bar"
7845 sub diff_style_nav {
7846         my ($diff_style, $is_combined) = @_;
7847         $diff_style ||= 'inline';
7848
7849         return "" if ($is_combined);
7850
7851         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7852         my %styles = @styles;
7853         @styles =
7854                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7855
7856         return join '',
7857                 map { " | ".$_ }
7858                 map {
7859                         $_ eq $diff_style ? $styles{$_} :
7860                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7861                 } @styles;
7862 }
7863
7864 sub git_commitdiff {
7865         my %params = @_;
7866         my $format = $params{-format} || 'html';
7867         my $diff_style = $input_params{'diff_style'} || 'inline';
7868
7869         my ($patch_max) = gitweb_get_feature('patches');
7870         if ($format eq 'patch') {
7871                 die_error(403, "Patch view not allowed") unless $patch_max;
7872         }
7873
7874         $hash ||= $hash_base || "HEAD";
7875         my %co = parse_commit($hash)
7876             or die_error(404, "Unknown commit object");
7877
7878         # choose format for commitdiff for merge
7879         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7880                 $hash_parent = '--cc';
7881         }
7882         # we need to prepare $formats_nav before almost any parameter munging
7883         my $formats_nav;
7884         if ($format eq 'html') {
7885                 $formats_nav =
7886                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7887                                 "raw");
7888                 if ($patch_max && @{$co{'parents'}} <= 1 &&
7889                         !gitweb_check_feature('email-privacy')) {
7890                         $formats_nav .= " | " .
7891                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7892                                         "patch");
7893                 }
7894                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7895
7896                 if (defined $hash_parent &&
7897                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7898                         # commitdiff with two commits given
7899                         my $hash_parent_short = $hash_parent;
7900                         if ($hash_parent =~ m/^$oid_regex$/) {
7901                                 $hash_parent_short = substr($hash_parent, 0, 7);
7902                         }
7903                         $formats_nav .=
7904                                 ' (from';
7905                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7906                                 if ($co{'parents'}[$i] eq $hash_parent) {
7907                                         $formats_nav .= ' parent ' . ($i+1);
7908                                         last;
7909                                 }
7910                         }
7911                         $formats_nav .= ': ' .
7912                                 $cgi->a({-href => href(-replay=>1,
7913                                                        hash=>$hash_parent, hash_base=>undef)},
7914                                         esc_html($hash_parent_short)) .
7915                                 ')';
7916                 } elsif (!$co{'parent'}) {
7917                         # --root commitdiff
7918                         $formats_nav .= ' (initial)';
7919                 } elsif (scalar @{$co{'parents'}} == 1) {
7920                         # single parent commit
7921                         $formats_nav .=
7922                                 ' (parent: ' .
7923                                 $cgi->a({-href => href(-replay=>1,
7924                                                        hash=>$co{'parent'}, hash_base=>undef)},
7925                                         esc_html(substr($co{'parent'}, 0, 7))) .
7926                                 ')';
7927                 } else {
7928                         # merge commit
7929                         if ($hash_parent eq '--cc') {
7930                                 $formats_nav .= ' | ' .
7931                                         $cgi->a({-href => href(-replay=>1,
7932                                                                hash=>$hash, hash_parent=>'-c')},
7933                                                 'combined');
7934                         } else { # $hash_parent eq '-c'
7935                                 $formats_nav .= ' | ' .
7936                                         $cgi->a({-href => href(-replay=>1,
7937                                                                hash=>$hash, hash_parent=>'--cc')},
7938                                                 'compact');
7939                         }
7940                         $formats_nav .=
7941                                 ' (merge: ' .
7942                                 join(' ', map {
7943                                         $cgi->a({-href => href(-replay=>1,
7944                                                                hash=>$_, hash_base=>undef)},
7945                                                 esc_html(substr($_, 0, 7)));
7946                                 } @{$co{'parents'}} ) .
7947                                 ')';
7948                 }
7949         }
7950
7951         my $hash_parent_param = $hash_parent;
7952         if (!defined $hash_parent_param) {
7953                 # --cc for multiple parents, --root for parentless
7954                 $hash_parent_param =
7955                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7956         }
7957
7958         # read commitdiff
7959         my $fd;
7960         my @difftree;
7961         if ($format eq 'html') {
7962                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7963                         "--no-commit-id", "--patch-with-raw", "--full-index",
7964                         $hash_parent_param, $hash, "--"
7965                         or die_error(500, "Open git-diff-tree failed");
7966
7967                 while (my $line = <$fd>) {
7968                         chomp $line;
7969                         # empty line ends raw part of diff-tree output
7970                         last unless $line;
7971                         push @difftree, scalar parse_difftree_raw_line($line);
7972                 }
7973
7974         } elsif ($format eq 'plain') {
7975                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7976                         '-p', $hash_parent_param, $hash, "--"
7977                         or die_error(500, "Open git-diff-tree failed");
7978         } elsif ($format eq 'patch') {
7979                 # For commit ranges, we limit the output to the number of
7980                 # patches specified in the 'patches' feature.
7981                 # For single commits, we limit the output to a single patch,
7982                 # diverging from the git-format-patch default.
7983                 my @commit_spec = ();
7984                 if ($hash_parent) {
7985                         if ($patch_max > 0) {
7986                                 push @commit_spec, "-$patch_max";
7987                         }
7988                         push @commit_spec, '-n', "$hash_parent..$hash";
7989                 } else {
7990                         if ($params{-single}) {
7991                                 push @commit_spec, '-1';
7992                         } else {
7993                                 if ($patch_max > 0) {
7994                                         push @commit_spec, "-$patch_max";
7995                                 }
7996                                 push @commit_spec, "-n";
7997                         }
7998                         push @commit_spec, '--root', $hash;
7999                 }
8000                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
8001                         '--encoding=utf8', '--stdout', @commit_spec
8002                         or die_error(500, "Open git-format-patch failed");
8003         } else {
8004                 die_error(400, "Unknown commitdiff format");
8005         }
8006
8007         # non-textual hash id's can be cached
8008         my $expires;
8009         if ($hash =~ m/^$oid_regex$/) {
8010                 $expires = "+1d";
8011         }
8012
8013         # write commit message
8014         if ($format eq 'html') {
8015                 my $refs = git_get_references();
8016                 my $ref = format_ref_marker($refs, $co{'id'});
8017
8018                 git_header_html(undef, $expires);
8019                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
8020                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
8021                 print "<div class=\"title_text\">\n" .
8022                       "<table class=\"object_header\">\n";
8023                 git_print_authorship_rows(\%co);
8024                 print "</table>".
8025                       "</div>\n";
8026                 print "<div class=\"page_body\">\n";
8027                 if (@{$co{'comment'}} > 1) {
8028                         print "<div class=\"log\">\n";
8029                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
8030                         print "</div>\n"; # class="log"
8031                 }
8032
8033         } elsif ($format eq 'plain') {
8034                 my $refs = git_get_references("tags");
8035                 my $tagname = git_get_rev_name_tags($hash);
8036                 my $filename = basename($project) . "-$hash.patch";
8037
8038                 print $cgi->header(
8039                         -type => 'text/plain',
8040                         -charset => 'utf-8',
8041                         -expires => $expires,
8042                         -content_disposition => 'inline; filename="' . "$filename" . '"');
8043                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
8044                 print "From: " . to_utf8($co{'author'}) . "\n";
8045                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
8046                 print "Subject: " . to_utf8($co{'title'}) . "\n";
8047
8048                 print "X-Git-Tag: $tagname\n" if $tagname;
8049                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
8050
8051                 foreach my $line (@{$co{'comment'}}) {
8052                         print to_utf8($line) . "\n";
8053                 }
8054                 print "---\n\n";
8055         } elsif ($format eq 'patch') {
8056                 my $filename = basename($project) . "-$hash.patch";
8057
8058                 print $cgi->header(
8059                         -type => 'text/plain',
8060                         -charset => 'utf-8',
8061                         -expires => $expires,
8062                         -content_disposition => 'inline; filename="' . "$filename" . '"');
8063         }
8064
8065         # write patch
8066         if ($format eq 'html') {
8067                 my $use_parents = !defined $hash_parent ||
8068                         $hash_parent eq '-c' || $hash_parent eq '--cc';
8069                 git_difftree_body(\@difftree, $hash,
8070                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
8071                 print "<br/>\n";
8072
8073                 git_patchset_body($fd, $diff_style,
8074                                   \@difftree, $hash,
8075                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
8076                 close $fd;
8077                 print "</div>\n"; # class="page_body"
8078                 git_footer_html();
8079
8080         } elsif ($format eq 'plain') {
8081                 local $/ = undef;
8082                 print <$fd>;
8083                 close $fd
8084                         or print "Reading git-diff-tree failed\n";
8085         } elsif ($format eq 'patch') {
8086                 local $/ = undef;
8087                 print <$fd>;
8088                 close $fd
8089                         or print "Reading git-format-patch failed\n";
8090         }
8091 }
8092
8093 sub git_commitdiff_plain {
8094         git_commitdiff(-format => 'plain');
8095 }
8096
8097 # format-patch-style patches
8098 sub git_patch {
8099         git_commitdiff(-format => 'patch', -single => 1);
8100 }
8101
8102 sub git_patches {
8103         git_commitdiff(-format => 'patch');
8104 }
8105
8106 sub git_history {
8107         git_log_generic('history', \&git_history_body,
8108                         $hash_base, $hash_parent_base,
8109                         $file_name, $hash);
8110 }
8111
8112 sub git_search {
8113         $searchtype ||= 'commit';
8114
8115         # check if appropriate features are enabled
8116         gitweb_check_feature('search')
8117                 or die_error(403, "Search is disabled");
8118         if ($searchtype eq 'pickaxe') {
8119                 # pickaxe may take all resources of your box and run for several minutes
8120                 # with every query - so decide by yourself how public you make this feature
8121                 gitweb_check_feature('pickaxe')
8122                         or die_error(403, "Pickaxe search is disabled");
8123         }
8124         if ($searchtype eq 'grep') {
8125                 # grep search might be potentially CPU-intensive, too
8126                 gitweb_check_feature('grep')
8127                         or die_error(403, "Grep search is disabled");
8128         }
8129
8130         if (!defined $searchtext) {
8131                 die_error(400, "Text field is empty");
8132         }
8133         if (!defined $hash) {
8134                 $hash = git_get_head_hash($project);
8135         }
8136         my %co = parse_commit($hash);
8137         if (!%co) {
8138                 die_error(404, "Unknown commit object");
8139         }
8140         if (!defined $page) {
8141                 $page = 0;
8142         }
8143
8144         if ($searchtype eq 'commit' ||
8145             $searchtype eq 'author' ||
8146             $searchtype eq 'committer') {
8147                 git_search_message(%co);
8148         } elsif ($searchtype eq 'pickaxe') {
8149                 git_search_changes(%co);
8150         } elsif ($searchtype eq 'grep') {
8151                 git_search_files(%co);
8152         } else {
8153                 die_error(400, "Unknown search type");
8154         }
8155 }
8156
8157 sub git_search_help {
8158         git_header_html();
8159         git_print_page_nav('','', $hash,$hash,$hash);
8160         print <<EOT;
8161 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
8162 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
8163 the pattern entered is recognized as the POSIX extended
8164 <a href="https://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
8165 insensitive).</p>
8166 <dl>
8167 <dt><b>commit</b></dt>
8168 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
8169 EOT
8170         my $have_grep = gitweb_check_feature('grep');
8171         if ($have_grep) {
8172                 print <<EOT;
8173 <dt><b>grep</b></dt>
8174 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
8175     a different one) are searched for the given pattern. On large trees, this search can take
8176 a while and put some strain on the server, so please use it with some consideration. Note that
8177 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
8178 case-sensitive.</dd>
8179 EOT
8180         }
8181         print <<EOT;
8182 <dt><b>author</b></dt>
8183 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
8184 <dt><b>committer</b></dt>
8185 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
8186 EOT
8187         my $have_pickaxe = gitweb_check_feature('pickaxe');
8188         if ($have_pickaxe) {
8189                 print <<EOT;
8190 <dt><b>pickaxe</b></dt>
8191 <dd>All commits that caused the string to appear or disappear from any file (changes that
8192 added, removed or "modified" the string) will be listed. This search can take a while and
8193 takes a lot of strain on the server, so please use it wisely. Note that since you may be
8194 interested even in changes just changing the case as well, this search is case sensitive.</dd>
8195 EOT
8196         }
8197         print "</dl>\n";
8198         git_footer_html();
8199 }
8200
8201 sub git_shortlog {
8202         git_log_generic('shortlog', \&git_shortlog_body,
8203                         $hash, $hash_parent);
8204 }
8205
8206 ## ......................................................................
8207 ## feeds (RSS, Atom; OPML)
8208
8209 sub git_feed {
8210         my $format = shift || 'atom';
8211         my $have_blame = gitweb_check_feature('blame');
8212
8213         # Atom: http://www.atomenabled.org/developers/syndication/
8214         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8215         if ($format ne 'rss' && $format ne 'atom') {
8216                 die_error(400, "Unknown web feed format");
8217         }
8218
8219         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8220         my $head = $hash || 'HEAD';
8221         my @commitlist = parse_commits($head, 150, 0, $file_name);
8222
8223         my %latest_commit;
8224         my %latest_date;
8225         my $content_type = "application/$format+xml";
8226         if (defined $cgi->http('HTTP_ACCEPT') &&
8227                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8228                 # browser (feed reader) prefers text/xml
8229                 $content_type = 'text/xml';
8230         }
8231         if (defined($commitlist[0])) {
8232                 %latest_commit = %{$commitlist[0]};
8233                 my $latest_epoch = $latest_commit{'committer_epoch'};
8234                 exit_if_unmodified_since($latest_epoch);
8235                 %latest_date = parse_date($latest_epoch, $latest_commit{'committer_tz'});
8236         }
8237         print $cgi->header(
8238                 -type => $content_type,
8239                 -charset => 'utf-8',
8240                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8241                 -status => '200 OK');
8242
8243         # Optimization: skip generating the body if client asks only
8244         # for Last-Modified date.
8245         return if ($cgi->request_method() eq 'HEAD');
8246
8247         # header variables
8248         my $title = "$site_name - $project/$action";
8249         my $feed_type = 'log';
8250         if (defined $hash) {
8251                 $title .= " - '$hash'";
8252                 $feed_type = 'branch log';
8253                 if (defined $file_name) {
8254                         $title .= " :: $file_name";
8255                         $feed_type = 'history';
8256                 }
8257         } elsif (defined $file_name) {
8258                 $title .= " - $file_name";
8259                 $feed_type = 'history';
8260         }
8261         $title .= " $feed_type";
8262         $title = esc_html($title);
8263         my $descr = git_get_project_description($project);
8264         if (defined $descr) {
8265                 $descr = esc_html($descr);
8266         } else {
8267                 $descr = "$project " .
8268                          ($format eq 'rss' ? 'RSS' : 'Atom') .
8269                          " feed";
8270         }
8271         my $owner = git_get_project_owner($project);
8272         $owner = esc_html($owner);
8273
8274         #header
8275         my $alt_url;
8276         if (defined $file_name) {
8277                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8278         } elsif (defined $hash) {
8279                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8280         } else {
8281                 $alt_url = href(-full=>1, action=>"summary");
8282         }
8283         $alt_url = esc_attr($alt_url);
8284         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8285         if ($format eq 'rss') {
8286                 print <<XML;
8287 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8288 <channel>
8289 XML
8290                 print "<title>$title</title>\n" .
8291                       "<link>$alt_url</link>\n" .
8292                       "<description>$descr</description>\n" .
8293                       "<language>en</language>\n" .
8294                       # project owner is responsible for 'editorial' content
8295                       "<managingEditor>$owner</managingEditor>\n";
8296                 if (defined $logo || defined $favicon) {
8297                         # prefer the logo to the favicon, since RSS
8298                         # doesn't allow both
8299                         my $img = esc_url($logo || $favicon);
8300                         print "<image>\n" .
8301                               "<url>$img</url>\n" .
8302                               "<title>$title</title>\n" .
8303                               "<link>$alt_url</link>\n" .
8304                               "</image>\n";
8305                 }
8306                 if (%latest_date) {
8307                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8308                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8309                 }
8310                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8311         } elsif ($format eq 'atom') {
8312                 print <<XML;
8313 <feed xmlns="http://www.w3.org/2005/Atom">
8314 XML
8315                 print "<title>$title</title>\n" .
8316                       "<subtitle>$descr</subtitle>\n" .
8317                       '<link rel="alternate" type="text/html" href="' .
8318                       $alt_url . '" />' . "\n" .
8319                       '<link rel="self" type="' . $content_type . '" href="' .
8320                       $cgi->self_url() . '" />' . "\n" .
8321                       "<id>" . esc_url(href(-full=>1)) . "</id>\n" .
8322                       # use project owner for feed author
8323                       "<author><name>$owner</name></author>\n";
8324                 if (defined $favicon) {
8325                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8326                 }
8327                 if (defined $logo) {
8328                         # not twice as wide as tall: 72 x 27 pixels
8329                         print "<logo>" . esc_url($logo) . "</logo>\n";
8330                 }
8331                 if (! %latest_date) {
8332                         # dummy date to keep the feed valid until commits trickle in:
8333                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8334                 } else {
8335                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8336                 }
8337                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8338         }
8339
8340         # contents
8341         for (my $i = 0; $i <= $#commitlist; $i++) {
8342                 my %co = %{$commitlist[$i]};
8343                 my $commit = $co{'id'};
8344                 # we read 150, we always show 30 and the ones more recent than 48 hours
8345                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8346                         last;
8347                 }
8348                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8349
8350                 # get list of changed files
8351                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8352                         $co{'parent'} || "--root",
8353                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8354                         or next;
8355                 my @difftree = map { chomp; $_ } <$fd>;
8356                 close $fd
8357                         or next;
8358
8359                 # print element (entry, item)
8360                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8361                 if ($format eq 'rss') {
8362                         print "<item>\n" .
8363                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8364                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8365                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8366                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8367                               "<link>" . esc_html($co_url) . "</link>\n" .
8368                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8369                               "<content:encoded>" .
8370                               "<![CDATA[\n";
8371                 } elsif ($format eq 'atom') {
8372                         print "<entry>\n" .
8373                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8374                               "<updated>$cd{'iso-8601'}</updated>\n" .
8375                               "<author>\n" .
8376                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8377                         if ($co{'author_email'}) {
8378                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8379                         }
8380                         print "</author>\n" .
8381                               # use committer for contributor
8382                               "<contributor>\n" .
8383                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8384                         if ($co{'committer_email'}) {
8385                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8386                         }
8387                         print "</contributor>\n" .
8388                               "<published>$cd{'iso-8601'}</published>\n" .
8389                               "<link rel=\"alternate\" type=\"text/html\" href=\"" . esc_attr($co_url) . "\" />\n" .
8390                               "<id>" . esc_html($co_url) . "</id>\n" .
8391                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8392                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8393                 }
8394                 my $comment = $co{'comment'};
8395                 print "<pre>\n";
8396                 foreach my $line (@$comment) {
8397                         $line = esc_html($line);
8398                         print "$line\n";
8399                 }
8400                 print "</pre><ul>\n";
8401                 foreach my $difftree_line (@difftree) {
8402                         my %difftree = parse_difftree_raw_line($difftree_line);
8403                         next if !$difftree{'from_id'};
8404
8405                         my $file = $difftree{'file'} || $difftree{'to_file'};
8406
8407                         print "<li>" .
8408                               "[" .
8409                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8410                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8411                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8412                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8413                                       -title => "diff"}, 'D');
8414                         if ($have_blame) {
8415                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8416                                                              file_name=>$file, hash_base=>$commit),
8417                                               -title => "blame"}, 'B');
8418                         }
8419                         # if this is not a feed of a file history
8420                         if (!defined $file_name || $file_name ne $file) {
8421                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8422                                                              file_name=>$file, hash=>$commit),
8423                                               -title => "history"}, 'H');
8424                         }
8425                         $file = esc_path($file);
8426                         print "] ".
8427                               "$file</li>\n";
8428                 }
8429                 if ($format eq 'rss') {
8430                         print "</ul>]]>\n" .
8431                               "</content:encoded>\n" .
8432                               "</item>\n";
8433                 } elsif ($format eq 'atom') {
8434                         print "</ul>\n</div>\n" .
8435                               "</content>\n" .
8436                               "</entry>\n";
8437                 }
8438         }
8439
8440         # end of feed
8441         if ($format eq 'rss') {
8442                 print "</channel>\n</rss>\n";
8443         } elsif ($format eq 'atom') {
8444                 print "</feed>\n";
8445         }
8446 }
8447
8448 sub git_rss {
8449         git_feed('rss');
8450 }
8451
8452 sub git_atom {
8453         git_feed('atom');
8454 }
8455
8456 sub git_opml {
8457         my @list = git_get_projects_list($project_filter, $strict_export);
8458         if (!@list) {
8459                 die_error(404, "No projects found");
8460         }
8461
8462         print $cgi->header(
8463                 -type => 'text/xml',
8464                 -charset => 'utf-8',
8465                 -content_disposition => 'inline; filename="opml.xml"');
8466
8467         my $title = esc_html($site_name);
8468         my $filter = " within subdirectory ";
8469         if (defined $project_filter) {
8470                 $filter .= esc_html($project_filter);
8471         } else {
8472                 $filter = "";
8473         }
8474         print <<XML;
8475 <?xml version="1.0" encoding="utf-8"?>
8476 <opml version="1.0">
8477 <head>
8478   <title>$title OPML Export$filter</title>
8479 </head>
8480 <body>
8481 <outline text="git RSS feeds">
8482 XML
8483
8484         foreach my $pr (@list) {
8485                 my %proj = %$pr;
8486                 my $head = git_get_head_hash($proj{'path'});
8487                 if (!defined $head) {
8488                         next;
8489                 }
8490                 $git_dir = "$projectroot/$proj{'path'}";
8491                 my %co = parse_commit($head);
8492                 if (!%co) {
8493                         next;
8494                 }
8495
8496                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8497                 my $rss  = esc_attr(href('project' => $proj{'path'}, 'action' => 'rss', -full => 1));
8498                 my $html = esc_attr(href('project' => $proj{'path'}, 'action' => 'summary', -full => 1));
8499                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8500         }
8501         print <<XML;
8502 </outline>
8503 </body>
8504 </opml>
8505 XML
8506 }