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         # $feature{'extra-branch-refs'}{'override'} = 1;
 566         # and in project config gitweb.extrabranchrefs = dirs of choice
 567         # Every directory is separated with whitespace.
 568
 569         'extra-branch-refs' => {
 570                 'sub' => \&feature_extra_branch_refs,
 571                 'override' => 0,
 572                 'default' => []},
 573 );
 574
 575 sub gitweb_get_feature {
 576         my ($name) = @_;
 577         return unless exists $feature{$name};
 578         my ($sub, $override, @defaults) = (
 579                 $feature{$name}{'sub'},
 580                 $feature{$name}{'override'},
 581                 @{$feature{$name}{'default'}});
 582         # project specific override is possible only if we have project
 583         our $git_dir; # global variable, declared later
 584         if (!$override || !defined $git_dir) {
 585                 return @defaults;
 586         }
 587         if (!defined $sub) {
 588                 warn "feature $name is not overridable";
 589                 return @defaults;
 590         }
 591         return $sub->(@defaults);
 592 }
 593
 594 # A wrapper to check if a given feature is enabled.
 595 # With this, you can say
 596 #
 597 #   my $bool_feat = gitweb_check_feature('bool_feat');
 598 #   gitweb_check_feature('bool_feat') or somecode;
 599 #
 600 # instead of
 601 #
 602 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 603 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 604 #
 605 sub gitweb_check_feature {
 606         return (gitweb_get_feature(@_))[0];
 607 }
 608
 609
 610 sub feature_bool {
 611         my $key = shift;
 612         my ($val) = git_get_project_config($key, '--bool');
 613
 614         if (!defined $val) {
 615                 return ($_[0]);
 616         } elsif ($val eq 'true') {
 617                 return (1);
 618         } elsif ($val eq 'false') {
 619                 return (0);
 620         }
 621 }
 622
 623 sub feature_snapshot {
 624         my (@fmts) = @_;
 625
 626         my ($val) = git_get_project_config('snapshot');
 627
 628         if ($val) {
 629                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 630         }
 631
 632         return @fmts;
 633 }
 634
 635 sub feature_patches {
 636         my @val = (git_get_project_config('patches', '--int'));
 637
 638         if (@val) {
 639                 return @val;
 640         }
 641
 642         return ($_[0]);
 643 }
 644
 645 sub feature_avatar {
 646         my @val = (git_get_project_config('avatar'));
 647
 648         return @val ? @val : @_;
 649 }
 650
 651 sub feature_extra_branch_refs {
 652         my (@branch_refs) = @_;
 653         my $values = git_get_project_config('extrabranchrefs');
 654
 655         if ($values) {
 656                 $values = config_to_multi ($values);
 657                 @branch_refs = ();
 658                 foreach my $value (@{$values}) {
 659                         push @branch_refs, split /\s+/, $value;
 660                 }
 661         }
 662
 663         return @branch_refs;
 664 }
 665
 666 # checking HEAD file with -e is fragile if the repository was
 667 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 668 # and then pruned.
 669 sub check_head_link {
 670         my ($dir) = @_;
 671         my $headfile = "$dir/HEAD";
 672         return ((-e $headfile) ||
 673                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 674 }
 675
 676 sub check_export_ok {
 677         my ($dir) = @_;
 678         return (check_head_link($dir) &&
 679                 (!$export_ok || -e "$dir/$export_ok") &&
 680                 (!$export_auth_hook || $export_auth_hook->($dir)));
 681 }
 682
 683 # process alternate names for backward compatibility
 684 # filter out unsupported (unknown) snapshot formats
 685 sub filter_snapshot_fmts {
 686         my @fmts = @_;
 687
 688         @fmts = map {
 689                 exists $known_snapshot_format_aliases{$_} ?
 690                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 691         @fmts = grep {
 692                 exists $known_snapshot_formats{$_} &&
 693                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 694 }
 695
 696 sub filter_and_validate_refs {
 697         my @refs = @_;
 698         my %unique_refs = ();
 699
 700         foreach my $ref (@refs) {
 701                 die_error(500, "Invalid ref '$ref' in 'extra-branch-refs' feature") unless (is_valid_ref_format($ref));
 702                 # 'heads' are added implicitly in get_branch_refs().
 703                 $unique_refs{$ref} = 1 if ($ref ne 'heads');
 704         }
 705         return sort keys %unique_refs;
 706 }
 707
 708 # If it is set to code reference, it is code that it is to be run once per
 709 # request, allowing updating configurations that change with each request,
 710 # while running other code in config file only once.
 711 #
 712 # Otherwise, if it is false then gitweb would process config file only once;
 713 # if it is true then gitweb config would be run for each request.
 714 our $per_request_config = 1;
 715
 716 # read and parse gitweb config file given by its parameter.
 717 # returns true on success, false on recoverable error, allowing
 718 # to chain this subroutine, using first file that exists.
 719 # dies on errors during parsing config file, as it is unrecoverable.
 720 sub read_config_file {
 721         my $filename = shift;
 722         return unless defined $filename;
 723         # die if there are errors parsing config file
 724         if (-e $filename) {
 725                 do $filename;
 726                 die $@ if $@;
 727                 return 1;
 728         }
 729         return;
 730 }
 731
 732 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 733 sub evaluate_gitweb_config {
 734         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 735         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 736         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 737
 738         # Protect against duplications of file names, to not read config twice.
 739         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 740         # there possibility of duplication of filename there doesn't matter.
 741         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 742         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 743
 744         # Common system-wide settings for convenience.
 745         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 746         read_config_file($GITWEB_CONFIG_COMMON);
 747
 748         # Use first config file that exists.  This means use the per-instance
 749         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 750         read_config_file($GITWEB_CONFIG) and return;
 751         read_config_file($GITWEB_CONFIG_SYSTEM);
 752 }
 753
 754 # Get loadavg of system, to compare against $maxload.
 755 # Currently it requires '/proc/loadavg' present to get loadavg;
 756 # if it is not present it returns 0, which means no load checking.
 757 sub get_loadavg {
 758         if( -e '/proc/loadavg' ){
 759                 open my $fd, '<', '/proc/loadavg'
 760                         or return 0;
 761                 my @load = split(/\s+/, scalar <$fd>);
 762                 close $fd;
 763
 764                 # The first three columns measure CPU and IO utilization of the last one,
 765                 # five, and 10 minute periods.  The fourth column shows the number of
 766                 # currently running processes and the total number of processes in the m/n
 767                 # format.  The last column displays the last process ID used.
 768                 return $load[0] || 0;
 769         }
 770         # additional checks for load average should go here for things that don't export
 771         # /proc/loadavg
 772
 773         return 0;
 774 }
 775
 776 # version of the core git binary
 777 our $git_version;
 778 sub evaluate_git_version {
 779         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 780         $number_of_git_cmds++;
 781 }
 782
 783 sub check_loadavg {
 784         if (defined $maxload && get_loadavg() > $maxload) {
 785                 die_error(503, "The load average on the server is too high");
 786         }
 787 }
 788
 789 # ======================================================================
 790 # input validation and dispatch
 791
 792 # Various hash size-related values.
 793 my $sha1_len = 40;
 794 my $sha256_extra_len = 24;
 795 my $sha256_len = $sha1_len + $sha256_extra_len;
 796
 797 # A regex matching $len hex characters. $len may be a range (e.g. 7,64).
 798 sub oid_nlen_regex {
 799         my $len = shift;
 800         my $hchr = qr/[0-9a-fA-F]/;
 801         return qr/(?:(?:$hchr){$len})/;
 802 }
 803
 804 # A regex matching two sets of $nlen hex characters, prefixed by the literal
 805 # string $prefix and with the literal string $infix between them.
 806 sub oid_nlen_prefix_infix_regex {
 807         my $nlen = shift;
 808         my $prefix = shift;
 809         my $infix = shift;
 810
 811         my $rx = oid_nlen_regex($nlen);
 812
 813         return qr/^\Q$prefix\E$rx\Q$infix\E$rx$/;
 814 }
 815
 816 # A regex matching a valid object ID.
 817 our $oid_regex;
 818 {
 819         my $x = oid_nlen_regex($sha1_len);
 820         my $y = oid_nlen_regex($sha256_extra_len);
 821         $oid_regex = qr/(?:$x(?:$y)?)/;
 822 }
 823
 824 # input parameters can be collected from a variety of sources (presently, CGI
 825 # and PATH_INFO), so we define an %input_params hash that collects them all
 826 # together during validation: this allows subsequent uses (e.g. href()) to be
 827 # agnostic of the parameter origin
 828
 829 our %input_params = ();
 830
 831 # input parameters are stored with the long parameter name as key. This will
 832 # also be used in the href subroutine to convert parameters to their CGI
 833 # equivalent, and since the href() usage is the most frequent one, we store
 834 # the name -> CGI key mapping here, instead of the reverse.
 835 #
 836 # XXX: Warning: If you touch this, check the search form for updating,
 837 # too.
 838
 839 our @cgi_param_mapping = (
 840         project => "p",
 841         action => "a",
 842         file_name => "f",
 843         file_parent => "fp",
 844         hash => "h",
 845         hash_parent => "hp",
 846         hash_base => "hb",
 847         hash_parent_base => "hpb",
 848         page => "pg",
 849         order => "o",
 850         searchtext => "s",
 851         searchtype => "st",
 852         snapshot_format => "sf",
 853         extra_options => "opt",
 854         search_use_regexp => "sr",
 855         ctag => "by_tag",
 856         diff_style => "ds",
 857         project_filter => "pf",
 858         # this must be last entry (for manipulation from JavaScript)
 859         javascript => "js"
 860 );
 861 our %cgi_param_mapping = @cgi_param_mapping;
 862
 863 # we will also need to know the possible actions, for validation
 864 our %actions = (
 865         "blame" => \&git_blame,
 866         "blame_incremental" => \&git_blame_incremental,
 867         "blame_data" => \&git_blame_data,
 868         "blobdiff" => \&git_blobdiff,
 869         "blobdiff_plain" => \&git_blobdiff_plain,
 870         "blob" => \&git_blob,
 871         "blob_plain" => \&git_blob_plain,
 872         "commitdiff" => \&git_commitdiff,
 873         "commitdiff_plain" => \&git_commitdiff_plain,
 874         "commit" => \&git_commit,
 875         "forks" => \&git_forks,
 876         "heads" => \&git_heads,
 877         "history" => \&git_history,
 878         "log" => \&git_log,
 879         "patch" => \&git_patch,
 880         "patches" => \&git_patches,
 881         "remotes" => \&git_remotes,
 882         "rss" => \&git_rss,
 883         "atom" => \&git_atom,
 884         "search" => \&git_search,
 885         "search_help" => \&git_search_help,
 886         "shortlog" => \&git_shortlog,
 887         "summary" => \&git_summary,
 888         "tag" => \&git_tag,
 889         "tags" => \&git_tags,
 890         "tree" => \&git_tree,
 891         "snapshot" => \&git_snapshot,
 892         "object" => \&git_object,
 893         # those below don't need $project
 894         "opml" => \&git_opml,
 895         "project_list" => \&git_project_list,
 896         "project_index" => \&git_project_index,
 897 );
 898
 899 # finally, we have the hash of allowed extra_options for the commands that
 900 # allow them
 901 our %allowed_options = (
 902         "--no-merges" => [ qw(rss atom log shortlog history) ],
 903 );
 904
 905 # fill %input_params with the CGI parameters. All values except for 'opt'
 906 # should be single values, but opt can be an array. We should probably
 907 # build an array of parameters that can be multi-valued, but since for the time
 908 # being it's only this one, we just single it out
 909 sub evaluate_query_params {
 910         our $cgi;
 911
 912         while (my ($name, $symbol) = each %cgi_param_mapping) {
 913                 if ($symbol eq 'opt') {
 914                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->multi_param($symbol) ];
 915                 } else {
 916                         $input_params{$name} = decode_utf8($cgi->param($symbol));
 917                 }
 918         }
 919 }
 920
 921 # now read PATH_INFO and update the parameter list for missing parameters
 922 sub evaluate_path_info {
 923         return if defined $input_params{'project'};
 924         return if !$path_info;
 925         $path_info =~ s,^/+,,;
 926         return if !$path_info;
 927
 928         # find which part of PATH_INFO is project
 929         my $project = $path_info;
 930         $project =~ s,/+$,,;
 931         while ($project && !check_head_link("$projectroot/$project")) {
 932                 $project =~ s,/*[^/]*$,,;
 933         }
 934         return unless $project;
 935         $input_params{'project'} = $project;
 936
 937         # do not change any parameters if an action is given using the query string
 938         return if $input_params{'action'};
 939         $path_info =~ s,^\Q$project\E/*,,;
 940
 941         # next, check if we have an action
 942         my $action = $path_info;
 943         $action =~ s,/.*$,,;
 944         if (exists $actions{$action}) {
 945                 $path_info =~ s,^$action/*,,;
 946                 $input_params{'action'} = $action;
 947         }
 948
 949         # list of actions that want hash_base instead of hash, but can have no
 950         # pathname (f) parameter
 951         my @wants_base = (
 952                 'tree',
 953                 'history',
 954         );
 955
 956         # we want to catch, among others
 957         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 958         my ($parentrefname, $parentpathname, $refname, $pathname) =
 959                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 960
 961         # first, analyze the 'current' part
 962         if (defined $pathname) {
 963                 # we got "branch:filename" or "branch:dir/"
 964                 # we could use git_get_type(branch:pathname), but:
 965                 # - it needs $git_dir
 966                 # - it does a git() call
 967                 # - the convention of terminating directories with a slash
 968                 #   makes it superfluous
 969                 # - embedding the action in the PATH_INFO would make it even
 970                 #   more superfluous
 971                 $pathname =~ s,^/+,,;
 972                 if (!$pathname || substr($pathname, -1) eq "/") {
 973                         $input_params{'action'} ||= "tree";
 974                         $pathname =~ s,/$,,;
 975                 } else {
 976                         # the default action depends on whether we had parent info
 977                         # or not
 978                         if ($parentrefname) {
 979                                 $input_params{'action'} ||= "blobdiff_plain";
 980                         } else {
 981                                 $input_params{'action'} ||= "blob_plain";
 982                         }
 983                 }
 984                 $input_params{'hash_base'} ||= $refname;
 985                 $input_params{'file_name'} ||= $pathname;
 986         } elsif (defined $refname) {
 987                 # we got "branch". In this case we have to choose if we have to
 988                 # set hash or hash_base.
 989                 #
 990                 # Most of the actions without a pathname only want hash to be
 991                 # set, except for the ones specified in @wants_base that want
 992                 # hash_base instead. It should also be noted that hand-crafted
 993                 # links having 'history' as an action and no pathname or hash
 994                 # set will fail, but that happens regardless of PATH_INFO.
 995                 if (defined $parentrefname) {
 996                         # if there is parent let the default be 'shortlog' action
 997                         # (for http://git.example.com/repo.git/A..B links); if there
 998                         # is no parent, dispatch will detect type of object and set
 999                         # action appropriately if required (if action is not set)
1000                         $input_params{'action'} ||= "shortlog";
1001                 }
1002                 if ($input_params{'action'} &&
1003                     grep { $_ eq $input_params{'action'} } @wants_base) {
1004                         $input_params{'hash_base'} ||= $refname;
1005                 } else {
1006                         $input_params{'hash'} ||= $refname;
1007                 }
1008         }
1009
1010         # next, handle the 'parent' part, if present
1011         if (defined $parentrefname) {
1012                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
1013                 # someproject/blobdiff/oldrev..newrev:/filename
1014                 if ($parentpathname) {
1015                         $parentpathname =~ s,^/+,,;
1016                         $parentpathname =~ s,/$,,;
1017                         $input_params{'file_parent'} ||= $parentpathname;
1018                 } else {
1019                         $input_params{'file_parent'} ||= $input_params{'file_name'};
1020                 }
1021                 # we assume that hash_parent_base is wanted if a path was specified,
1022                 # or if the action wants hash_base instead of hash
1023                 if (defined $input_params{'file_parent'} ||
1024                         grep { $_ eq $input_params{'action'} } @wants_base) {
1025                         $input_params{'hash_parent_base'} ||= $parentrefname;
1026                 } else {
1027                         $input_params{'hash_parent'} ||= $parentrefname;
1028                 }
1029         }
1030
1031         # for the snapshot action, we allow URLs in the form
1032         # $project/snapshot/$hash.ext
1033         # where .ext determines the snapshot and gets removed from the
1034         # passed $refname to provide the $hash.
1035         #
1036         # To be able to tell that $refname includes the format extension, we
1037         # require the following two conditions to be satisfied:
1038         # - the hash input parameter MUST have been set from the $refname part
1039         #   of the URL (i.e. they must be equal)
1040         # - the snapshot format MUST NOT have been defined already (e.g. from
1041         #   CGI parameter sf)
1042         # It's also useless to try any matching unless $refname has a dot,
1043         # so we check for that too
1044         if (defined $input_params{'action'} &&
1045                 $input_params{'action'} eq 'snapshot' &&
1046                 defined $refname && index($refname, '.') != -1 &&
1047                 $refname eq $input_params{'hash'} &&
1048                 !defined $input_params{'snapshot_format'}) {
1049                 # We loop over the known snapshot formats, checking for
1050                 # extensions. Allowed extensions are both the defined suffix
1051                 # (which includes the initial dot already) and the snapshot
1052                 # format key itself, with a prepended dot
1053                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
1054                         my $hash = $refname;
1055                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
1056                                 next;
1057                         }
1058                         my $sfx = $1;
1059                         # a valid suffix was found, so set the snapshot format
1060                         # and reset the hash parameter
1061                         $input_params{'snapshot_format'} = $fmt;
1062                         $input_params{'hash'} = $hash;
1063                         # we also set the format suffix to the one requested
1064                         # in the URL: this way a request for e.g. .tgz returns
1065                         # a .tgz instead of a .tar.gz
1066                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
1067                         last;
1068                 }
1069         }
1070 }
1071
1072 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
1073      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
1074      $searchtext, $search_regexp, $project_filter);
1075 sub evaluate_and_validate_params {
1076         our $action = $input_params{'action'};
1077         if (defined $action) {
1078                 if (!is_valid_action($action)) {
1079                         die_error(400, "Invalid action parameter");
1080                 }
1081         }
1082
1083         # parameters which are pathnames
1084         our $project = $input_params{'project'};
1085         if (defined $project) {
1086                 if (!is_valid_project($project)) {
1087                         undef $project;
1088                         die_error(404, "No such project");
1089                 }
1090         }
1091
1092         our $project_filter = $input_params{'project_filter'};
1093         if (defined $project_filter) {
1094                 if (!is_valid_pathname($project_filter)) {
1095                         die_error(404, "Invalid project_filter parameter");
1096                 }
1097         }
1098
1099         our $file_name = $input_params{'file_name'};
1100         if (defined $file_name) {
1101                 if (!is_valid_pathname($file_name)) {
1102                         die_error(400, "Invalid file parameter");
1103                 }
1104         }
1105
1106         our $file_parent = $input_params{'file_parent'};
1107         if (defined $file_parent) {
1108                 if (!is_valid_pathname($file_parent)) {
1109                         die_error(400, "Invalid file parent parameter");
1110                 }
1111         }
1112
1113         # parameters which are refnames
1114         our $hash = $input_params{'hash'};
1115         if (defined $hash) {
1116                 if (!is_valid_refname($hash)) {
1117                         die_error(400, "Invalid hash parameter");
1118                 }
1119         }
1120
1121         our $hash_parent = $input_params{'hash_parent'};
1122         if (defined $hash_parent) {
1123                 if (!is_valid_refname($hash_parent)) {
1124                         die_error(400, "Invalid hash parent parameter");
1125                 }
1126         }
1127
1128         our $hash_base = $input_params{'hash_base'};
1129         if (defined $hash_base) {
1130                 if (!is_valid_refname($hash_base)) {
1131                         die_error(400, "Invalid hash base parameter");
1132                 }
1133         }
1134
1135         our @extra_options = @{$input_params{'extra_options'}};
1136         # @extra_options is always defined, since it can only be (currently) set from
1137         # CGI, and $cgi->param() returns the empty array in array context if the param
1138         # is not set
1139         foreach my $opt (@extra_options) {
1140                 if (not exists $allowed_options{$opt}) {
1141                         die_error(400, "Invalid option parameter");
1142                 }
1143                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1144                         die_error(400, "Invalid option parameter for this action");
1145                 }
1146         }
1147
1148         our $hash_parent_base = $input_params{'hash_parent_base'};
1149         if (defined $hash_parent_base) {
1150                 if (!is_valid_refname($hash_parent_base)) {
1151                         die_error(400, "Invalid hash parent base parameter");
1152                 }
1153         }
1154
1155         # other parameters
1156         our $page = $input_params{'page'};
1157         if (defined $page) {
1158                 if ($page =~ m/[^0-9]/) {
1159                         die_error(400, "Invalid page parameter");
1160                 }
1161         }
1162
1163         our $searchtype = $input_params{'searchtype'};
1164         if (defined $searchtype) {
1165                 if ($searchtype =~ m/[^a-z]/) {
1166                         die_error(400, "Invalid searchtype parameter");
1167                 }
1168         }
1169
1170         our $search_use_regexp = $input_params{'search_use_regexp'};
1171
1172         our $searchtext = $input_params{'searchtext'};
1173         our $search_regexp = undef;
1174         if (defined $searchtext) {
1175                 if (length($searchtext) < 2) {
1176                         die_error(403, "At least two characters are required for search parameter");
1177                 }
1178                 if ($search_use_regexp) {
1179                         $search_regexp = $searchtext;
1180                         if (!eval { qr/$search_regexp/; 1; }) {
1181                                 (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1182                                 die_error(400, "Invalid search regexp '$search_regexp'",
1183                                           esc_html($error));
1184                         }
1185                 } else {
1186                         $search_regexp = quotemeta $searchtext;
1187                 }
1188         }
1189 }
1190
1191 # path to the current git repository
1192 our $git_dir;
1193 sub evaluate_git_dir {
1194         our $git_dir = "$projectroot/$project" if $project;
1195 }
1196
1197 our (@snapshot_fmts, $git_avatar, @extra_branch_refs);
1198 sub configure_gitweb_features {
1199         # list of supported snapshot formats
1200         our @snapshot_fmts = gitweb_get_feature('snapshot');
1201         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1202
1203         our ($git_avatar) = gitweb_get_feature('avatar');
1204         $git_avatar = '' unless $git_avatar =~ /^(?:gravatar|picon)$/s;
1205
1206         our @extra_branch_refs = gitweb_get_feature('extra-branch-refs');
1207         @extra_branch_refs = filter_and_validate_refs (@extra_branch_refs);
1208 }
1209
1210 sub get_branch_refs {
1211         return ('heads', @extra_branch_refs);
1212 }
1213
1214 # custom error handler: 'die <message>' is Internal Server Error
1215 sub handle_errors_html {
1216         my $msg = shift; # it is already HTML escaped
1217
1218         # to avoid infinite loop where error occurs in die_error,
1219         # change handler to default handler, disabling handle_errors_html
1220         set_message("Error occurred when inside die_error:\n$msg");
1221
1222         # you cannot jump out of die_error when called as error handler;
1223         # the subroutine set via CGI::Carp::set_message is called _after_
1224         # HTTP headers are already written, so it cannot write them itself
1225         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1226 }
1227 set_message(\&handle_errors_html);
1228
1229 # dispatch
1230 sub dispatch {
1231         if (!defined $action) {
1232                 if (defined $hash) {
1233                         $action = git_get_type($hash);
1234                         $action or die_error(404, "Object does not exist");
1235                 } elsif (defined $hash_base && defined $file_name) {
1236                         $action = git_get_type("$hash_base:$file_name");
1237                         $action or die_error(404, "File or directory does not exist");
1238                 } elsif (defined $project) {
1239                         $action = 'summary';
1240                 } else {
1241                         $action = 'project_list';
1242                 }
1243         }
1244         if (!defined($actions{$action})) {
1245                 die_error(400, "Unknown action");
1246         }
1247         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1248             !$project) {
1249                 die_error(400, "Project needed");
1250         }
1251         $actions{$action}->();
1252 }
1253
1254 sub reset_timer {
1255         our $t0 = [ gettimeofday() ]
1256                 if defined $t0;
1257         our $number_of_git_cmds = 0;
1258 }
1259
1260 our $first_request = 1;
1261 sub run_request {
1262         reset_timer();
1263
1264         evaluate_uri();
1265         if ($first_request) {
1266                 evaluate_gitweb_config();
1267                 evaluate_git_version();
1268         }
1269         if ($per_request_config) {
1270                 if (ref($per_request_config) eq 'CODE') {
1271                         $per_request_config->();
1272                 } elsif (!$first_request) {
1273                         evaluate_gitweb_config();
1274                 }
1275         }
1276         check_loadavg();
1277
1278         # $projectroot and $projects_list might be set in gitweb config file
1279         $projects_list ||= $projectroot;
1280
1281         evaluate_query_params();
1282         evaluate_path_info();
1283         evaluate_and_validate_params();
1284         evaluate_git_dir();
1285
1286         configure_gitweb_features();
1287
1288         dispatch();
1289 }
1290
1291 our $is_last_request = sub { 1 };
1292 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1293 our $CGI = 'CGI';
1294 our $cgi;
1295 sub configure_as_fcgi {
1296         require CGI::Fast;
1297         our $CGI = 'CGI::Fast';
1298
1299         my $request_number = 0;
1300         # let each child service 100 requests
1301         our $is_last_request = sub { ++$request_number > 100 };
1302 }
1303 sub evaluate_argv {
1304         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1305         configure_as_fcgi()
1306                 if $script_name =~ /\.fcgi$/;
1307
1308         return unless (@ARGV);
1309
1310         require Getopt::Long;
1311         Getopt::Long::GetOptions(
1312                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1313                 'nproc|n=i' => sub {
1314                         my ($arg, $val) = @_;
1315                         return unless eval { require FCGI::ProcManager; 1; };
1316                         my $proc_manager = FCGI::ProcManager->new({
1317                                 n_processes => $val,
1318                         });
1319                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1320                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1321                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1322                 },
1323         );
1324 }
1325
1326 sub run {
1327         evaluate_argv();
1328
1329         $first_request = 1;
1330         $pre_listen_hook->()
1331                 if $pre_listen_hook;
1332
1333  REQUEST:
1334         while ($cgi = $CGI->new()) {
1335                 $pre_dispatch_hook->()
1336                         if $pre_dispatch_hook;
1337
1338                 run_request();
1339
1340                 $post_dispatch_hook->()
1341                         if $post_dispatch_hook;
1342                 $first_request = 0;
1343
1344                 last REQUEST if ($is_last_request->());
1345         }
1346
1347  DONE_GITWEB:
1348         1;
1349 }
1350
1351 run();
1352
1353 if (defined caller) {
1354         # wrapped in a subroutine processing requests,
1355         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1356         return;
1357 } else {
1358         # pure CGI script, serving single request
1359         exit;
1360 }
1361
1362 ## ======================================================================
1363 ## action links
1364
1365 # possible values of extra options
1366 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1367 # -replay => 1      - start from a current view (replay with modifications)
1368 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1369 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1370 sub href {
1371         my %params = @_;
1372         # default is to use -absolute url() i.e. $my_uri
1373         my $href = $params{-full} ? $my_url : $my_uri;
1374
1375         # implicit -replay, must be first of implicit params
1376         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1377
1378         $params{'project'} = $project unless exists $params{'project'};
1379
1380         if ($params{-replay}) {
1381                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1382                         if (!exists $params{$name}) {
1383                                 $params{$name} = $input_params{$name};
1384                         }
1385                 }
1386         }
1387
1388         my $use_pathinfo = gitweb_check_feature('pathinfo');
1389         if (defined $params{'project'} &&
1390             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1391                 # try to put as many parameters as possible in PATH_INFO:
1392                 #   - project name
1393                 #   - action
1394                 #   - hash_parent or hash_parent_base:/file_parent
1395                 #   - hash or hash_base:/filename
1396                 #   - the snapshot_format as an appropriate suffix
1397
1398                 # When the script is the root DirectoryIndex for the domain,
1399                 # $href here would be something like http://gitweb.example.com/
1400                 # Thus, we strip any trailing / from $href, to spare us double
1401                 # slashes in the final URL
1402                 $href =~ s,/$,,;
1403
1404                 # Then add the project name, if present
1405                 $href .= "/".esc_path_info($params{'project'});
1406                 delete $params{'project'};
1407
1408                 # since we destructively absorb parameters, we keep this
1409                 # boolean that remembers if we're handling a snapshot
1410                 my $is_snapshot = $params{'action'} eq 'snapshot';
1411
1412                 # Summary just uses the project path URL, any other action is
1413                 # added to the URL
1414                 if (defined $params{'action'}) {
1415                         $href .= "/".esc_path_info($params{'action'})
1416                                 unless $params{'action'} eq 'summary';
1417                         delete $params{'action'};
1418                 }
1419
1420                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1421                 # stripping nonexistent or useless pieces
1422                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1423                         || $params{'hash_parent'} || $params{'hash'});
1424                 if (defined $params{'hash_base'}) {
1425                         if (defined $params{'hash_parent_base'}) {
1426                                 $href .= esc_path_info($params{'hash_parent_base'});
1427                                 # skip the file_parent if it's the same as the file_name
1428                                 if (defined $params{'file_parent'}) {
1429                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1430                                                 delete $params{'file_parent'};
1431                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1432                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1433                                                 delete $params{'file_parent'};
1434                                         }
1435                                 }
1436                                 $href .= "..";
1437                                 delete $params{'hash_parent'};
1438                                 delete $params{'hash_parent_base'};
1439                         } elsif (defined $params{'hash_parent'}) {
1440                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1441                                 delete $params{'hash_parent'};
1442                         }
1443
1444                         $href .= esc_path_info($params{'hash_base'});
1445                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1446                                 $href .= ":/".esc_path_info($params{'file_name'});
1447                                 delete $params{'file_name'};
1448                         }
1449                         delete $params{'hash'};
1450                         delete $params{'hash_base'};
1451                 } elsif (defined $params{'hash'}) {
1452                         $href .= esc_path_info($params{'hash'});
1453                         delete $params{'hash'};
1454                 }
1455
1456                 # If the action was a snapshot, we can absorb the
1457                 # snapshot_format parameter too
1458                 if ($is_snapshot) {
1459                         my $fmt = $params{'snapshot_format'};
1460                         # snapshot_format should always be defined when href()
1461                         # is called, but just in case some code forgets, we
1462                         # fall back to the default
1463                         $fmt ||= $snapshot_fmts[0];
1464                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1465                         delete $params{'snapshot_format'};
1466                 }
1467         }
1468
1469         # now encode the parameters explicitly
1470         my @result = ();
1471         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1472                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1473                 if (defined $params{$name}) {
1474                         if (ref($params{$name}) eq "ARRAY") {
1475                                 foreach my $par (@{$params{$name}}) {
1476                                         push @result, $symbol . "=" . esc_param($par);
1477                                 }
1478                         } else {
1479                                 push @result, $symbol . "=" . esc_param($params{$name});
1480                         }
1481                 }
1482         }
1483         $href .= "?" . join(';', @result) if scalar @result;
1484
1485         # final transformation: trailing spaces must be escaped (URI-encoded)
1486         $href =~ s/(\s+)$/CGI::escape($1)/e;
1487
1488         if ($params{-anchor}) {
1489                 $href .= "#".esc_param($params{-anchor});
1490         }
1491
1492         return $href;
1493 }
1494
1495
1496 ## ======================================================================
1497 ## validation, quoting/unquoting and escaping
1498
1499 sub is_valid_action {
1500         my $input = shift;
1501         return undef unless exists $actions{$input};
1502         return 1;
1503 }
1504
1505 sub is_valid_project {
1506         my $input = shift;
1507
1508         return unless defined $input;
1509         if (!is_valid_pathname($input) ||
1510                 !(-d "$projectroot/$input") ||
1511                 !check_export_ok("$projectroot/$input") ||
1512                 ($strict_export && !project_in_list($input))) {
1513                 return undef;
1514         } else {
1515                 return 1;
1516         }
1517 }
1518
1519 sub is_valid_pathname {
1520         my $input = shift;
1521
1522         return undef unless defined $input;
1523         # no '.' or '..' as elements of path, i.e. no '.' or '..'
1524         # at the beginning, at the end, and between slashes.
1525         # also this catches doubled slashes
1526         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1527                 return undef;
1528         }
1529         # no null characters
1530         if ($input =~ m!\0!) {
1531                 return undef;
1532         }
1533         return 1;
1534 }
1535
1536 sub is_valid_ref_format {
1537         my $input = shift;
1538
1539         return undef unless defined $input;
1540         # restrictions on ref name according to git-check-ref-format
1541         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1542                 return undef;
1543         }
1544         return 1;
1545 }
1546
1547 sub is_valid_refname {
1548         my $input = shift;
1549
1550         return undef unless defined $input;
1551         # textual hashes are O.K.
1552         if ($input =~ m/^$oid_regex$/) {
1553                 return 1;
1554         }
1555         # it must be correct pathname
1556         is_valid_pathname($input) or return undef;
1557         # check git-check-ref-format restrictions
1558         is_valid_ref_format($input) or return undef;
1559         return 1;
1560 }
1561
1562 # decode sequences of octets in utf8 into Perl's internal form,
1563 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1564 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1565 sub to_utf8 {
1566         my $str = shift;
1567         return undef unless defined $str;
1568
1569         if (utf8::is_utf8($str) || utf8::decode($str)) {
1570                 return $str;
1571         } else {
1572                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1573         }
1574 }
1575
1576 # quote unsafe chars, but keep the slash, even when it's not
1577 # correct, but quoted slashes look too horrible in bookmarks
1578 sub esc_param {
1579         my $str = shift;
1580         return undef unless defined $str;
1581         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1582         $str =~ s/ /\+/g;
1583         return $str;
1584 }
1585
1586 # the quoting rules for path_info fragment are slightly different
1587 sub esc_path_info {
1588         my $str = shift;
1589         return undef unless defined $str;
1590
1591         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1592         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1593
1594         return $str;
1595 }
1596
1597 # quote unsafe chars in whole URL, so some characters cannot be quoted
1598 sub esc_url {
1599         my $str = shift;
1600         return undef unless defined $str;
1601         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1602         $str =~ s/ /\+/g;
1603         return $str;
1604 }
1605
1606 # quote unsafe characters in HTML attributes
1607 sub esc_attr {
1608
1609         # for XHTML conformance escaping '"' to '&quot;' is not enough
1610         return esc_html(@_);
1611 }
1612
1613 # replace invalid utf8 character with SUBSTITUTION sequence
1614 sub esc_html {
1615         my $str = shift;
1616         my %opts = @_;
1617
1618         return undef unless defined $str;
1619
1620         $str = to_utf8($str);
1621         $str = $cgi->escapeHTML($str);
1622         if ($opts{'-nbsp'}) {
1623                 $str =~ s/ /&nbsp;/g;
1624         }
1625         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1626         return $str;
1627 }
1628
1629 # quote control characters and escape filename to HTML
1630 sub esc_path {
1631         my $str = shift;
1632         my %opts = @_;
1633
1634         return undef unless defined $str;
1635
1636         $str = to_utf8($str);
1637         $str = $cgi->escapeHTML($str);
1638         if ($opts{'-nbsp'}) {
1639                 $str =~ s/ /&nbsp;/g;
1640         }
1641         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1642         return $str;
1643 }
1644
1645 # Sanitize for use in XHTML + application/xml+xhtml (valid XML 1.0)
1646 sub sanitize {
1647         my $str = shift;
1648
1649         return undef unless defined $str;
1650
1651         $str = to_utf8($str);
1652         $str =~ s|([[:cntrl:]])|(index("\t\n\r", $1) != -1 ? $1 : quot_cec($1))|eg;
1653         return $str;
1654 }
1655
1656 # Make control characters "printable", using character escape codes (CEC)
1657 sub quot_cec {
1658         my $cntrl = shift;
1659         my %opts = @_;
1660         my %es = ( # character escape codes, aka escape sequences
1661                 "\t" => '\t',   # tab            (HT)
1662                 "\n" => '\n',   # line feed      (LF)
1663                 "\r" => '\r',   # carrige return (CR)
1664                 "\f" => '\f',   # form feed      (FF)
1665                 "\b" => '\b',   # backspace      (BS)
1666                 "\a" => '\a',   # alarm (bell)   (BEL)
1667                 "\e" => '\e',   # escape         (ESC)
1668                 "\013" => '\v', # vertical tab   (VT)
1669                 "\000" => '\0', # nul character  (NUL)
1670         );
1671         my $chr = ( (exists $es{$cntrl})
1672                     ? $es{$cntrl}
1673                     : sprintf('\%2x', ord($cntrl)) );
1674         if ($opts{-nohtml}) {
1675                 return $chr;
1676         } else {
1677                 return "<span class=\"cntrl\">$chr</span>";
1678         }
1679 }
1680
1681 # Alternatively use unicode control pictures codepoints,
1682 # Unicode "printable representation" (PR)
1683 sub quot_upr {
1684         my $cntrl = shift;
1685         my %opts = @_;
1686
1687         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1688         if ($opts{-nohtml}) {
1689                 return $chr;
1690         } else {
1691                 return "<span class=\"cntrl\">$chr</span>";
1692         }
1693 }
1694
1695 # git may return quoted and escaped filenames
1696 sub unquote {
1697         my $str = shift;
1698
1699         sub unq {
1700                 my $seq = shift;
1701                 my %es = ( # character escape codes, aka escape sequences
1702                         't' => "\t",   # tab            (HT, TAB)
1703                         'n' => "\n",   # newline        (NL)
1704                         'r' => "\r",   # return         (CR)
1705                         'f' => "\f",   # form feed      (FF)
1706                         'b' => "\b",   # backspace      (BS)
1707                         'a' => "\a",   # alarm (bell)   (BEL)
1708                         'e' => "\e",   # escape         (ESC)
1709                         'v' => "\013", # vertical tab   (VT)
1710                 );
1711
1712                 if ($seq =~ m/^[0-7]{1,3}$/) {
1713                         # octal char sequence
1714                         return chr(oct($seq));
1715                 } elsif (exists $es{$seq}) {
1716                         # C escape sequence, aka character escape code
1717                         return $es{$seq};
1718                 }
1719                 # quoted ordinary character
1720                 return $seq;
1721         }
1722
1723         if ($str =~ m/^"(.*)"$/) {
1724                 # needs unquoting
1725                 $str = $1;
1726                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1727         }
1728         return $str;
1729 }
1730
1731 # escape tabs (convert tabs to spaces)
1732 sub untabify {
1733         my $line = shift;
1734
1735         while ((my $pos = index($line, "\t")) != -1) {
1736                 if (my $count = (8 - ($pos % 8))) {
1737                         my $spaces = ' ' x $count;
1738                         $line =~ s/\t/$spaces/;
1739                 }
1740         }
1741
1742         return $line;
1743 }
1744
1745 sub project_in_list {
1746         my $project = shift;
1747         my @list = git_get_projects_list();
1748         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1749 }
1750
1751 ## ----------------------------------------------------------------------
1752 ## HTML aware string manipulation
1753
1754 # Try to chop given string on a word boundary between position
1755 # $len and $len+$add_len. If there is no word boundary there,
1756 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1757 # (marking chopped part) would be longer than given string.
1758 sub chop_str {
1759         my $str = shift;
1760         my $len = shift;
1761         my $add_len = shift || 10;
1762         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1763
1764         # Make sure perl knows it is utf8 encoded so we don't
1765         # cut in the middle of a utf8 multibyte char.
1766         $str = to_utf8($str);
1767
1768         # allow only $len chars, but don't cut a word if it would fit in $add_len
1769         # if it doesn't fit, cut it if it's still longer than the dots we would add
1770         # remove chopped character entities entirely
1771
1772         # when chopping in the middle, distribute $len into left and right part
1773         # return early if chopping wouldn't make string shorter
1774         if ($where eq 'center') {
1775                 return $str if ($len + 5 >= length($str)); # filler is length 5
1776                 $len = int($len/2);
1777         } else {
1778                 return $str if ($len + 4 >= length($str)); # filler is length 4
1779         }
1780
1781         # regexps: ending and beginning with word part up to $add_len
1782         my $endre = qr/.{$len}\w{0,$add_len}/;
1783         my $begre = qr/\w{0,$add_len}.{$len}/;
1784
1785         if ($where eq 'left') {
1786                 $str =~ m/^(.*?)($begre)$/;
1787                 my ($lead, $body) = ($1, $2);
1788                 if (length($lead) > 4) {
1789                         $lead = " ...";
1790                 }
1791                 return "$lead$body";
1792
1793         } elsif ($where eq 'center') {
1794                 $str =~ m/^($endre)(.*)$/;
1795                 my ($left, $str)  = ($1, $2);
1796                 $str =~ m/^(.*?)($begre)$/;
1797                 my ($mid, $right) = ($1, $2);
1798                 if (length($mid) > 5) {
1799                         $mid = " ... ";
1800                 }
1801                 return "$left$mid$right";
1802
1803         } else {
1804                 $str =~ m/^($endre)(.*)$/;
1805                 my $body = $1;
1806                 my $tail = $2;
1807                 if (length($tail) > 4) {
1808                         $tail = "... ";
1809                 }
1810                 return "$body$tail";
1811         }
1812 }
1813
1814 # takes the same arguments as chop_str, but also wraps a <span> around the
1815 # result with a title attribute if it does get chopped. Additionally, the
1816 # string is HTML-escaped.
1817 sub chop_and_escape_str {
1818         my ($str) = @_;
1819
1820         my $chopped = chop_str(@_);
1821         $str = to_utf8($str);
1822         if ($chopped eq $str) {
1823                 return esc_html($chopped);
1824         } else {
1825                 $str =~ s/[[:cntrl:]]/?/g;
1826                 return $cgi->span({-title=>$str}, esc_html($chopped));
1827         }
1828 }
1829
1830 # Highlight selected fragments of string, using given CSS class,
1831 # and escape HTML.  It is assumed that fragments do not overlap.
1832 # Regions are passed as list of pairs (array references).
1833 #
1834 # Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1835 # '<span class="mark">foo</span>bar'
1836 sub esc_html_hl_regions {
1837         my ($str, $css_class, @sel) = @_;
1838         my %opts = grep { ref($_) ne 'ARRAY' } @sel;
1839         @sel     = grep { ref($_) eq 'ARRAY' } @sel;
1840         return esc_html($str, %opts) unless @sel;
1841
1842         my $out = '';
1843         my $pos = 0;
1844
1845         for my $s (@sel) {
1846                 my ($begin, $end) = @$s;
1847
1848                 # Don't create empty <span> elements.
1849                 next if $end <= $begin;
1850
1851                 my $escaped = esc_html(substr($str, $begin, $end - $begin),
1852                                        %opts);
1853
1854                 $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
1855                         if ($begin - $pos > 0);
1856                 $out .= $cgi->span({-class => $css_class}, $escaped);
1857
1858                 $pos = $end;
1859         }
1860         $out .= esc_html(substr($str, $pos), %opts)
1861                 if ($pos < length($str));
1862
1863         return $out;
1864 }
1865
1866 # return positions of beginning and end of each match
1867 sub matchpos_list {
1868         my ($str, $regexp) = @_;
1869         return unless (defined $str && defined $regexp);
1870
1871         my @matches;
1872         while ($str =~ /$regexp/g) {
1873                 push @matches, [$-[0], $+[0]];
1874         }
1875         return @matches;
1876 }
1877
1878 # highlight match (if any), and escape HTML
1879 sub esc_html_match_hl {
1880         my ($str, $regexp) = @_;
1881         return esc_html($str) unless defined $regexp;
1882
1883         my @matches = matchpos_list($str, $regexp);
1884         return esc_html($str) unless @matches;
1885
1886         return esc_html_hl_regions($str, 'match', @matches);
1887 }
1888
1889
1890 # highlight match (if any) of shortened string, and escape HTML
1891 sub esc_html_match_hl_chopped {
1892         my ($str, $chopped, $regexp) = @_;
1893         return esc_html_match_hl($str, $regexp) unless defined $chopped;
1894
1895         my @matches = matchpos_list($str, $regexp);
1896         return esc_html($chopped) unless @matches;
1897
1898         # filter matches so that we mark chopped string
1899         my $tail = "... "; # see chop_str
1900         unless ($chopped =~ s/\Q$tail\E$//) {
1901                 $tail = '';
1902         }
1903         my $chop_len = length($chopped);
1904         my $tail_len = length($tail);
1905         my @filtered;
1906
1907         for my $m (@matches) {
1908                 if ($m->[0] > $chop_len) {
1909                         push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1910                         last;
1911                 } elsif ($m->[1] > $chop_len) {
1912                         push @filtered, [ $m->[0], $chop_len + $tail_len ];
1913                         last;
1914                 }
1915                 push @filtered, $m;
1916         }
1917
1918         return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1919 }
1920
1921 ## ----------------------------------------------------------------------
1922 ## functions returning short strings
1923
1924 # CSS class for given age value (in seconds)
1925 sub age_class {
1926         my $age = shift;
1927
1928         if (!defined $age) {
1929                 return "noage";
1930         } elsif ($age < 60*60*2) {
1931                 return "age0";
1932         } elsif ($age < 60*60*24*2) {
1933                 return "age1";
1934         } else {
1935                 return "age2";
1936         }
1937 }
1938
1939 # convert age in seconds to "nn units ago" string
1940 sub age_string {
1941         my $age = shift;
1942         my $age_str;
1943
1944         if ($age > 60*60*24*365*2) {
1945                 $age_str = (int $age/60/60/24/365);
1946                 $age_str .= " years ago";
1947         } elsif ($age > 60*60*24*(365/12)*2) {
1948                 $age_str = int $age/60/60/24/(365/12);
1949                 $age_str .= " months ago";
1950         } elsif ($age > 60*60*24*7*2) {
1951                 $age_str = int $age/60/60/24/7;
1952                 $age_str .= " weeks ago";
1953         } elsif ($age > 60*60*24*2) {
1954                 $age_str = int $age/60/60/24;
1955                 $age_str .= " days ago";
1956         } elsif ($age > 60*60*2) {
1957                 $age_str = int $age/60/60;
1958                 $age_str .= " hours ago";
1959         } elsif ($age > 60*2) {
1960                 $age_str = int $age/60;
1961                 $age_str .= " min ago";
1962         } elsif ($age > 2) {
1963                 $age_str = int $age;
1964                 $age_str .= " sec ago";
1965         } else {
1966                 $age_str .= " right now";
1967         }
1968         return $age_str;
1969 }
1970
1971 use constant {
1972         S_IFINVALID => 0030000,
1973         S_IFGITLINK => 0160000,
1974 };
1975
1976 # submodule/subproject, a commit object reference
1977 sub S_ISGITLINK {
1978         my $mode = shift;
1979
1980         return (($mode & S_IFMT) == S_IFGITLINK)
1981 }
1982
1983 # convert file mode in octal to symbolic file mode string
1984 sub mode_str {
1985         my $mode = oct shift;
1986
1987         if (S_ISGITLINK($mode)) {
1988                 return 'm---------';
1989         } elsif (S_ISDIR($mode & S_IFMT)) {
1990                 return 'drwxr-xr-x';
1991         } elsif (S_ISLNK($mode)) {
1992                 return 'lrwxrwxrwx';
1993         } elsif (S_ISREG($mode)) {
1994                 # git cares only about the executable bit
1995                 if ($mode & S_IXUSR) {
1996                         return '-rwxr-xr-x';
1997                 } else {
1998                         return '-rw-r--r--';
1999                 };
2000         } else {
2001                 return '----------';
2002         }
2003 }
2004
2005 # convert file mode in octal to file type string
2006 sub file_type {
2007         my $mode = shift;
2008
2009         if ($mode !~ m/^[0-7]+$/) {
2010                 return $mode;
2011         } else {
2012                 $mode = oct $mode;
2013         }
2014
2015         if (S_ISGITLINK($mode)) {
2016                 return "submodule";
2017         } elsif (S_ISDIR($mode & S_IFMT)) {
2018                 return "directory";
2019         } elsif (S_ISLNK($mode)) {
2020                 return "symlink";
2021         } elsif (S_ISREG($mode)) {
2022                 return "file";
2023         } else {
2024                 return "unknown";
2025         }
2026 }
2027
2028 # convert file mode in octal to file type description string
2029 sub file_type_long {
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($mode)) {
2045                 if ($mode & S_IXUSR) {
2046                         return "executable";
2047                 } else {
2048                         return "file";
2049                 };
2050         } else {
2051                 return "unknown";
2052         }
2053 }
2054
2055
2056 ## ----------------------------------------------------------------------
2057 ## functions returning short HTML fragments, or transforming HTML fragments
2058 ## which don't belong to other sections
2059
2060 # format line of commit message.
2061 sub format_log_line_html {
2062         my $line = shift;
2063
2064         # Potentially abbreviated OID.
2065         my $regex = oid_nlen_regex("7,64");
2066
2067         $line = esc_html($line, -nbsp=>1);
2068         $line =~ s{
2069         \b
2070         (
2071             # The output of "git describe", e.g. v2.10.0-297-gf6727b0
2072             # or hadoop-20160921-113441-20-g094fb7d
2073             (?<!-) # see strbuf_check_tag_ref(). Tags can't start with -
2074             [A-Za-z0-9.-]+
2075             (?!\.) # refs can't end with ".", see check_refname_format()
2076             -g$regex
2077             |
2078             # Just a normal looking Git SHA1
2079             $regex
2080         )
2081         \b
2082     }{
2083                 $cgi->a({-href => href(action=>"object", hash=>$1),
2084                                         -class => "text"}, $1);
2085         }egx;
2086
2087         return $line;
2088 }
2089
2090 # format marker of refs pointing to given object
2091
2092 # the destination action is chosen based on object type and current context:
2093 # - for annotated tags, we choose the tag view unless it's the current view
2094 #   already, in which case we go to shortlog view
2095 # - for other refs, we keep the current view if we're in history, shortlog or
2096 #   log view, and select shortlog otherwise
2097 sub format_ref_marker {
2098         my ($refs, $id) = @_;
2099         my $markers = '';
2100
2101         if (defined $refs->{$id}) {
2102                 foreach my $ref (@{$refs->{$id}}) {
2103                         # this code exploits the fact that non-lightweight tags are the
2104                         # only indirect objects, and that they are the only objects for which
2105                         # we want to use tag instead of shortlog as action
2106                         my ($type, $name) = qw();
2107                         my $indirect = ($ref =~ s/\^\{\}$//);
2108                         # e.g. tags/v2.6.11 or heads/next
2109                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
2110                                 $type = $1;
2111                                 $name = $2;
2112                         } else {
2113                                 $type = "ref";
2114                                 $name = $ref;
2115                         }
2116
2117                         my $class = $type;
2118                         $class .= " indirect" if $indirect;
2119
2120                         my $dest_action = "shortlog";
2121
2122                         if ($indirect) {
2123                                 $dest_action = "tag" unless $action eq "tag";
2124                         } elsif ($action =~ /^(history|(short)?log)$/) {
2125                                 $dest_action = $action;
2126                         }
2127
2128                         my $dest = "";
2129                         $dest .= "refs/" unless $ref =~ m!^refs/!;
2130                         $dest .= $ref;
2131
2132                         my $link = $cgi->a({
2133                                 -href => href(
2134                                         action=>$dest_action,
2135                                         hash=>$dest
2136                                 )}, esc_html($name));
2137
2138                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2139                                 $link . "</span>";
2140                 }
2141         }
2142
2143         if ($markers) {
2144                 return ' <span class="refs">'. $markers . '</span>';
2145         } else {
2146                 return "";
2147         }
2148 }
2149
2150 # format, perhaps shortened and with markers, title line
2151 sub format_subject_html {
2152         my ($long, $short, $href, $extra) = @_;
2153         $extra = '' unless defined($extra);
2154
2155         if (length($short) < length($long)) {
2156                 $long =~ s/[[:cntrl:]]/?/g;
2157                 return $cgi->a({-href => $href, -class => "list subject",
2158                                 -title => to_utf8($long)},
2159                        esc_html($short)) . $extra;
2160         } else {
2161                 return $cgi->a({-href => $href, -class => "list subject"},
2162                        esc_html($long)) . $extra;
2163         }
2164 }
2165
2166 # Rather than recomputing the url for an email multiple times, we cache it
2167 # after the first hit. This gives a visible benefit in views where the avatar
2168 # for the same email is used repeatedly (e.g. shortlog).
2169 # The cache is shared by all avatar engines (currently gravatar only), which
2170 # are free to use it as preferred. Since only one avatar engine is used for any
2171 # given page, there's no risk for cache conflicts.
2172 our %avatar_cache = ();
2173
2174 # Compute the picon url for a given email, by using the picon search service over at
2175 # http://www.cs.indiana.edu/picons/search.html
2176 sub picon_url {
2177         my $email = lc shift;
2178         if (!$avatar_cache{$email}) {
2179                 my ($user, $domain) = split('@', $email);
2180                 $avatar_cache{$email} =
2181                         "//www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2182                         "$domain/$user/" .
2183                         "users+domains+unknown/up/single";
2184         }
2185         return $avatar_cache{$email};
2186 }
2187
2188 # Compute the gravatar url for a given email, if it's not in the cache already.
2189 # Gravatar stores only the part of the URL before the size, since that's the
2190 # one computationally more expensive. This also allows reuse of the cache for
2191 # different sizes (for this particular engine).
2192 sub gravatar_url {
2193         my $email = lc shift;
2194         my $size = shift;
2195         $avatar_cache{$email} ||=
2196                 "//www.gravatar.com/avatar/" .
2197                         md5_hex($email) . "?s=";
2198         return $avatar_cache{$email} . $size;
2199 }
2200
2201 # Insert an avatar for the given $email at the given $size if the feature
2202 # is enabled.
2203 sub git_get_avatar {
2204         my ($email, %opts) = @_;
2205         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2206         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2207         $opts{-size} ||= 'default';
2208         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2209         my $url = "";
2210         if ($git_avatar eq 'gravatar') {
2211                 $url = gravatar_url($email, $size);
2212         } elsif ($git_avatar eq 'picon') {
2213                 $url = picon_url($email);
2214         }
2215         # Other providers can be added by extending the if chain, defining $url
2216         # as needed. If no variant puts something in $url, we assume avatars
2217         # are completely disabled/unavailable.
2218         if ($url) {
2219                 return $pre_white .
2220                        "<img width=\"$size\" " .
2221                             "class=\"avatar\" " .
2222                             "src=\"".esc_url($url)."\" " .
2223                             "alt=\"\" " .
2224                        "/>" . $post_white;
2225         } else {
2226                 return "";
2227         }
2228 }
2229
2230 sub format_search_author {
2231         my ($author, $searchtype, $displaytext) = @_;
2232         my $have_search = gitweb_check_feature('search');
2233
2234         if ($have_search) {
2235                 my $performed = "";
2236                 if ($searchtype eq 'author') {
2237                         $performed = "authored";
2238                 } elsif ($searchtype eq 'committer') {
2239                         $performed = "committed";
2240                 }
2241
2242                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2243                                 searchtext=>$author,
2244                                 searchtype=>$searchtype), class=>"list",
2245                                 title=>"Search for commits $performed by $author"},
2246                                 $displaytext);
2247
2248         } else {
2249                 return $displaytext;
2250         }
2251 }
2252
2253 # format the author name of the given commit with the given tag
2254 # the author name is chopped and escaped according to the other
2255 # optional parameters (see chop_str).
2256 sub format_author_html {
2257         my $tag = shift;
2258         my $co = shift;
2259         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2260         return "<$tag class=\"author\">" .
2261                format_search_author($co->{'author_name'}, "author",
2262                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2263                        $author) .
2264                "</$tag>";
2265 }
2266
2267 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2268 sub format_git_diff_header_line {
2269         my $line = shift;
2270         my $diffinfo = shift;
2271         my ($from, $to) = @_;
2272
2273         if ($diffinfo->{'nparents'}) {
2274                 # combined diff
2275                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2276                 if ($to->{'href'}) {
2277                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2278                                          esc_path($to->{'file'}));
2279                 } else { # file was deleted (no href)
2280                         $line .= esc_path($to->{'file'});
2281                 }
2282         } else {
2283                 # "ordinary" diff
2284                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2285                 if ($from->{'href'}) {
2286                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2287                                          'a/' . esc_path($from->{'file'}));
2288                 } else { # file was added (no href)
2289                         $line .= 'a/' . esc_path($from->{'file'});
2290                 }
2291                 $line .= ' ';
2292                 if ($to->{'href'}) {
2293                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2294                                          'b/' . esc_path($to->{'file'}));
2295                 } else { # file was deleted
2296                         $line .= 'b/' . esc_path($to->{'file'});
2297                 }
2298         }
2299
2300         return "<div class=\"diff header\">$line</div>\n";
2301 }
2302
2303 # format extended diff header line, before patch itself
2304 sub format_extended_diff_header_line {
2305         my $line = shift;
2306         my $diffinfo = shift;
2307         my ($from, $to) = @_;
2308
2309         # match <path>
2310         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2311                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2312                                        esc_path($from->{'file'}));
2313         }
2314         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2315                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2316                                  esc_path($to->{'file'}));
2317         }
2318         # match single <mode>
2319         if ($line =~ m/\s(\d{6})$/) {
2320                 $line .= '<span class="info"> (' .
2321                          file_type_long($1) .
2322                          ')</span>';
2323         }
2324         # match <hash>
2325         if ($line =~ oid_nlen_prefix_infix_regex($sha1_len, "index ", ",") |
2326             $line =~ oid_nlen_prefix_infix_regex($sha256_len, "index ", ",")) {
2327                 # can match only for combined diff
2328                 $line = 'index ';
2329                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2330                         if ($from->{'href'}[$i]) {
2331                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2332                                                   -class=>"hash"},
2333                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2334                         } else {
2335                                 $line .= '0' x 7;
2336                         }
2337                         # separator
2338                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2339                 }
2340                 $line .= '..';
2341                 if ($to->{'href'}) {
2342                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2343                                          substr($diffinfo->{'to_id'},0,7));
2344                 } else {
2345                         $line .= '0' x 7;
2346                 }
2347
2348         } elsif ($line =~ oid_nlen_prefix_infix_regex($sha1_len, "index ", "..") |
2349                  $line =~ oid_nlen_prefix_infix_regex($sha256_len, "index ", "..")) {
2350                 # can match only for ordinary diff
2351                 my ($from_link, $to_link);
2352                 if ($from->{'href'}) {
2353                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2354                                              substr($diffinfo->{'from_id'},0,7));
2355                 } else {
2356                         $from_link = '0' x 7;
2357                 }
2358                 if ($to->{'href'}) {
2359                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2360                                            substr($diffinfo->{'to_id'},0,7));
2361                 } else {
2362                         $to_link = '0' x 7;
2363                 }
2364                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2365                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2366         }
2367
2368         return $line . "<br/>\n";
2369 }
2370
2371 # format from-file/to-file diff header
2372 sub format_diff_from_to_header {
2373         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2374         my $line;
2375         my $result = '';
2376
2377         $line = $from_line;
2378         #assert($line =~ m/^---/) if DEBUG;
2379         # no extra formatting for "^--- /dev/null"
2380         if (! $diffinfo->{'nparents'}) {
2381                 # ordinary (single parent) diff
2382                 if ($line =~ m!^--- "?a/!) {
2383                         if ($from->{'href'}) {
2384                                 $line = '--- a/' .
2385                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2386                                                 esc_path($from->{'file'}));
2387                         } else {
2388                                 $line = '--- a/' .
2389                                         esc_path($from->{'file'});
2390                         }
2391                 }
2392                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2393
2394         } else {
2395                 # combined diff (merge commit)
2396                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2397                         if ($from->{'href'}[$i]) {
2398                                 $line = '--- ' .
2399                                         $cgi->a({-href=>href(action=>"blobdiff",
2400                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2401                                                              hash_parent_base=>$parents[$i],
2402                                                              file_parent=>$from->{'file'}[$i],
2403                                                              hash=>$diffinfo->{'to_id'},
2404                                                              hash_base=>$hash,
2405                                                              file_name=>$to->{'file'}),
2406                                                  -class=>"path",
2407                                                  -title=>"diff" . ($i+1)},
2408                                                 $i+1) .
2409                                         '/' .
2410                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2411                                                 esc_path($from->{'file'}[$i]));
2412                         } else {
2413                                 $line = '--- /dev/null';
2414                         }
2415                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2416                 }
2417         }
2418
2419         $line = $to_line;
2420         #assert($line =~ m/^\+\+\+/) if DEBUG;
2421         # no extra formatting for "^+++ /dev/null"
2422         if ($line =~ m!^\+\+\+ "?b/!) {
2423                 if ($to->{'href'}) {
2424                         $line = '+++ b/' .
2425                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2426                                         esc_path($to->{'file'}));
2427                 } else {
2428                         $line = '+++ b/' .
2429                                 esc_path($to->{'file'});
2430                 }
2431         }
2432         $result .= qq!<div class="diff to_file">$line</div>\n!;
2433
2434         return $result;
2435 }
2436
2437 # create note for patch simplified by combined diff
2438 sub format_diff_cc_simplified {
2439         my ($diffinfo, @parents) = @_;
2440         my $result = '';
2441
2442         $result .= "<div class=\"diff header\">" .
2443                    "diff --cc ";
2444         if (!is_deleted($diffinfo)) {
2445                 $result .= $cgi->a({-href => href(action=>"blob",
2446                                                   hash_base=>$hash,
2447                                                   hash=>$diffinfo->{'to_id'},
2448                                                   file_name=>$diffinfo->{'to_file'}),
2449                                     -class => "path"},
2450                                    esc_path($diffinfo->{'to_file'}));
2451         } else {
2452                 $result .= esc_path($diffinfo->{'to_file'});
2453         }
2454         $result .= "</div>\n" . # class="diff header"
2455                    "<div class=\"diff nodifferences\">" .
2456                    "Simple merge" .
2457                    "</div>\n"; # class="diff nodifferences"
2458
2459         return $result;
2460 }
2461
2462 sub diff_line_class {
2463         my ($line, $from, $to) = @_;
2464
2465         # ordinary diff
2466         my $num_sign = 1;
2467         # combined diff
2468         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2469                 $num_sign = scalar @{$from->{'href'}};
2470         }
2471
2472         my @diff_line_classifier = (
2473                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2474                 { regexp => qr/^\\/,               class => "incomplete"  },
2475                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2476                 # classifier for context must come before classifier add/rem,
2477                 # or we would have to use more complicated regexp, for example
2478                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2479                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2480                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2481         );
2482         for my $clsfy (@diff_line_classifier) {
2483                 return $clsfy->{'class'}
2484                         if ($line =~ $clsfy->{'regexp'});
2485         }
2486
2487         # fallback
2488         return "";
2489 }
2490
2491 # assumes that $from and $to are defined and correctly filled,
2492 # and that $line holds a line of chunk header for unified diff
2493 sub format_unidiff_chunk_header {
2494         my ($line, $from, $to) = @_;
2495
2496         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2497                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2498
2499         $from_lines = 0 unless defined $from_lines;
2500         $to_lines   = 0 unless defined $to_lines;
2501
2502         if ($from->{'href'}) {
2503                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2504                                      -class=>"list"}, $from_text);
2505         }
2506         if ($to->{'href'}) {
2507                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2508                                      -class=>"list"}, $to_text);
2509         }
2510         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2511                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2512         return $line;
2513 }
2514
2515 # assumes that $from and $to are defined and correctly filled,
2516 # and that $line holds a line of chunk header for combined diff
2517 sub format_cc_diff_chunk_header {
2518         my ($line, $from, $to) = @_;
2519
2520         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2521         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2522
2523         @from_text = split(' ', $ranges);
2524         for (my $i = 0; $i < @from_text; ++$i) {
2525                 ($from_start[$i], $from_nlines[$i]) =
2526                         (split(',', substr($from_text[$i], 1)), 0);
2527         }
2528
2529         $to_text   = pop @from_text;
2530         $to_start  = pop @from_start;
2531         $to_nlines = pop @from_nlines;
2532
2533         $line = "<span class=\"chunk_info\">$prefix ";
2534         for (my $i = 0; $i < @from_text; ++$i) {
2535                 if ($from->{'href'}[$i]) {
2536                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2537                                           -class=>"list"}, $from_text[$i]);
2538                 } else {
2539                         $line .= $from_text[$i];
2540                 }
2541                 $line .= " ";
2542         }
2543         if ($to->{'href'}) {
2544                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2545                                   -class=>"list"}, $to_text);
2546         } else {
2547                 $line .= $to_text;
2548         }
2549         $line .= " $prefix</span>" .
2550                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2551         return $line;
2552 }
2553
2554 # process patch (diff) line (not to be used for diff headers),
2555 # returning HTML-formatted (but not wrapped) line.
2556 # If the line is passed as a reference, it is treated as HTML and not
2557 # esc_html()'ed.
2558 sub format_diff_line {
2559         my ($line, $diff_class, $from, $to) = @_;
2560
2561         if (ref($line)) {
2562                 $line = $$line;
2563         } else {
2564                 chomp $line;
2565                 $line = untabify($line);
2566
2567                 if ($from && $to && $line =~ m/^\@{2} /) {
2568                         $line = format_unidiff_chunk_header($line, $from, $to);
2569                 } elsif ($from && $to && $line =~ m/^\@{3}/) {
2570                         $line = format_cc_diff_chunk_header($line, $from, $to);
2571                 } else {
2572                         $line = esc_html($line, -nbsp=>1);
2573                 }
2574         }
2575
2576         my $diff_classes = "diff";
2577         $diff_classes .= " $diff_class" if ($diff_class);
2578         $line = "<div class=\"$diff_classes\">$line</div>\n";
2579
2580         return $line;
2581 }
2582
2583 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2584 # linked.  Pass the hash of the tree/commit to snapshot.
2585 sub format_snapshot_links {
2586         my ($hash) = @_;
2587         my $num_fmts = @snapshot_fmts;
2588         if ($num_fmts > 1) {
2589                 # A parenthesized list of links bearing format names.
2590                 # e.g. "snapshot (_tar.gz_ _zip_)"
2591                 return "snapshot (" . join(' ', map
2592                         $cgi->a({
2593                                 -href => href(
2594                                         action=>"snapshot",
2595                                         hash=>$hash,
2596                                         snapshot_format=>$_
2597                                 )
2598                         }, $known_snapshot_formats{$_}{'display'})
2599                 , @snapshot_fmts) . ")";
2600         } elsif ($num_fmts == 1) {
2601                 # A single "snapshot" link whose tooltip bears the format name.
2602                 # i.e. "_snapshot_"
2603                 my ($fmt) = @snapshot_fmts;
2604                 return
2605                         $cgi->a({
2606                                 -href => href(
2607                                         action=>"snapshot",
2608                                         hash=>$hash,
2609                                         snapshot_format=>$fmt
2610                                 ),
2611                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2612                         }, "snapshot");
2613         } else { # $num_fmts == 0
2614                 return undef;
2615         }
2616 }
2617
2618 ## ......................................................................
2619 ## functions returning values to be passed, perhaps after some
2620 ## transformation, to other functions; e.g. returning arguments to href()
2621
2622 # returns hash to be passed to href to generate gitweb URL
2623 # in -title key it returns description of link
2624 sub get_feed_info {
2625         my $format = shift || 'Atom';
2626         my %res = (action => lc($format));
2627         my $matched_ref = 0;
2628
2629         # feed links are possible only for project views
2630         return unless (defined $project);
2631         # some views should link to OPML, or to generic project feed,
2632         # or don't have specific feed yet (so they should use generic)
2633         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2634
2635         my $branch = undef;
2636         # branches refs uses 'refs/' + $get_branch_refs()[x] + '/' prefix
2637         # (fullname) to differentiate from tag links; this also makes
2638         # possible to detect branch links
2639         for my $ref (get_branch_refs()) {
2640                 if ((defined $hash_base && $hash_base =~ m!^refs/\Q$ref\E/(.*)$!) ||
2641                     (defined $hash      && $hash      =~ m!^refs/\Q$ref\E/(.*)$!)) {
2642                         $branch = $1;
2643                         $matched_ref = $ref;
2644                         last;
2645                 }
2646         }
2647         # find log type for feed description (title)
2648         my $type = 'log';
2649         if (defined $file_name) {
2650                 $type  = "history of $file_name";
2651                 $type .= "/" if ($action eq 'tree');
2652                 $type .= " on '$branch'" if (defined $branch);
2653         } else {
2654                 $type = "log of $branch" if (defined $branch);
2655         }
2656
2657         $res{-title} = $type;
2658         $res{'hash'} = (defined $branch ? "refs/$matched_ref/$branch" : undef);
2659         $res{'file_name'} = $file_name;
2660
2661         return %res;
2662 }
2663
2664 ## ----------------------------------------------------------------------
2665 ## git utility subroutines, invoking git commands
2666
2667 # returns path to the core git executable and the --git-dir parameter as list
2668 sub git_cmd {
2669         $number_of_git_cmds++;
2670         return $GIT, '--git-dir='.$git_dir;
2671 }
2672
2673 # quote the given arguments for passing them to the shell
2674 # quote_command("command", "arg 1", "arg with ' and ! characters")
2675 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2676 # Try to avoid using this function wherever possible.
2677 sub quote_command {
2678         return join(' ',
2679                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2680 }
2681
2682 # get HEAD ref of given project as hash
2683 sub git_get_head_hash {
2684         return git_get_full_hash(shift, 'HEAD');
2685 }
2686
2687 sub git_get_full_hash {
2688         return git_get_hash(@_);
2689 }
2690
2691 sub git_get_short_hash {
2692         return git_get_hash(@_, '--short=7');
2693 }
2694
2695 sub git_get_hash {
2696         my ($project, $hash, @options) = @_;
2697         my $o_git_dir = $git_dir;
2698         my $retval = undef;
2699         $git_dir = "$projectroot/$project";
2700         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2701             '--verify', '-q', @options, $hash) {
2702                 $retval = <$fd>;
2703                 chomp $retval if defined $retval;
2704                 close $fd;
2705         }
2706         if (defined $o_git_dir) {
2707                 $git_dir = $o_git_dir;
2708         }
2709         return $retval;
2710 }
2711
2712 # get type of given object
2713 sub git_get_type {
2714         my $hash = shift;
2715
2716         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2717         my $type = <$fd>;
2718         close $fd or return;
2719         chomp $type;
2720         return $type;
2721 }
2722
2723 # repository configuration
2724 our $config_file = '';
2725 our %config;
2726
2727 # store multiple values for single key as anonymous array reference
2728 # single values stored directly in the hash, not as [ <value> ]
2729 sub hash_set_multi {
2730         my ($hash, $key, $value) = @_;
2731
2732         if (!exists $hash->{$key}) {
2733                 $hash->{$key} = $value;
2734         } elsif (!ref $hash->{$key}) {
2735                 $hash->{$key} = [ $hash->{$key}, $value ];
2736         } else {
2737                 push @{$hash->{$key}}, $value;
2738         }
2739 }
2740
2741 # return hash of git project configuration
2742 # optionally limited to some section, e.g. 'gitweb'
2743 sub git_parse_project_config {
2744         my $section_regexp = shift;
2745         my %config;
2746
2747         local $/ = "\0";
2748
2749         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2750                 or return;
2751
2752         while (my $keyval = <$fh>) {
2753                 chomp $keyval;
2754                 my ($key, $value) = split(/\n/, $keyval, 2);
2755
2756                 hash_set_multi(\%config, $key, $value)
2757                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2758         }
2759         close $fh;
2760
2761         return %config;
2762 }
2763
2764 # convert config value to boolean: 'true' or 'false'
2765 # no value, number > 0, 'true' and 'yes' values are true
2766 # rest of values are treated as false (never as error)
2767 sub config_to_bool {
2768         my $val = shift;
2769
2770         return 1 if !defined $val;             # section.key
2771
2772         # strip leading and trailing whitespace
2773         $val =~ s/^\s+//;
2774         $val =~ s/\s+$//;
2775
2776         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2777                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2778 }
2779
2780 # convert config value to simple decimal number
2781 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2782 # to be multiplied by 1024, 1048576, or 1073741824
2783 sub config_to_int {
2784         my $val = shift;
2785
2786         # strip leading and trailing whitespace
2787         $val =~ s/^\s+//;
2788         $val =~ s/\s+$//;
2789
2790         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2791                 $unit = lc($unit);
2792                 # unknown unit is treated as 1
2793                 return $num * ($unit eq 'g' ? 1073741824 :
2794                                $unit eq 'm' ?    1048576 :
2795                                $unit eq 'k' ?       1024 : 1);
2796         }
2797         return $val;
2798 }
2799
2800 # convert config value to array reference, if needed
2801 sub config_to_multi {
2802         my $val = shift;
2803
2804         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2805 }
2806
2807 sub git_get_project_config {
2808         my ($key, $type) = @_;
2809
2810         return unless defined $git_dir;
2811
2812         # key sanity check
2813         return unless ($key);
2814         # only subsection, if exists, is case sensitive,
2815         # and not lowercased by 'git config -z -l'
2816         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2817                 $lo =~ s/_//g;
2818                 $key = join(".", lc($hi), $mi, lc($lo));
2819                 return if ($lo =~ /\W/ || $hi =~ /\W/);
2820         } else {
2821                 $key = lc($key);
2822                 $key =~ s/_//g;
2823                 return if ($key =~ /\W/);
2824         }
2825         $key =~ s/^gitweb\.//;
2826
2827         # type sanity check
2828         if (defined $type) {
2829                 $type =~ s/^--//;
2830                 $type = undef
2831                         unless ($type eq 'bool' || $type eq 'int');
2832         }
2833
2834         # get config
2835         if (!defined $config_file ||
2836             $config_file ne "$git_dir/config") {
2837                 %config = git_parse_project_config('gitweb');
2838                 $config_file = "$git_dir/config";
2839         }
2840
2841         # check if config variable (key) exists
2842         return unless exists $config{"gitweb.$key"};
2843
2844         # ensure given type
2845         if (!defined $type) {
2846                 return $config{"gitweb.$key"};
2847         } elsif ($type eq 'bool') {
2848                 # backward compatibility: 'git config --bool' returns true/false
2849                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2850         } elsif ($type eq 'int') {
2851                 return config_to_int($config{"gitweb.$key"});
2852         }
2853         return $config{"gitweb.$key"};
2854 }
2855
2856 # get hash of given path at given ref
2857 sub git_get_hash_by_path {
2858         my $base = shift;
2859         my $path = shift || return undef;
2860         my $type = shift;
2861
2862         $path =~ s,/+$,,;
2863
2864         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2865                 or die_error(500, "Open git-ls-tree failed");
2866         my $line = <$fd>;
2867         close $fd or return undef;
2868
2869         if (!defined $line) {
2870                 # there is no tree or hash given by $path at $base
2871                 return undef;
2872         }
2873
2874         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2875         $line =~ m/^([0-9]+) (.+) ($oid_regex)\t/;
2876         if (defined $type && $type ne $2) {
2877                 # type doesn't match
2878                 return undef;
2879         }
2880         return $3;
2881 }
2882
2883 # get path of entry with given hash at given tree-ish (ref)
2884 # used to get 'from' filename for combined diff (merge commit) for renames
2885 sub git_get_path_by_hash {
2886         my $base = shift || return;
2887         my $hash = shift || return;
2888
2889         local $/ = "\0";
2890
2891         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2892                 or return undef;
2893         while (my $line = <$fd>) {
2894                 chomp $line;
2895
2896                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2897                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2898                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2899                         close $fd;
2900                         return $1;
2901                 }
2902         }
2903         close $fd;
2904         return undef;
2905 }
2906
2907 ## ......................................................................
2908 ## git utility functions, directly accessing git repository
2909
2910 # get the value of config variable either from file named as the variable
2911 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2912 # configuration variable in the repository config file.
2913 sub git_get_file_or_project_config {
2914         my ($path, $name) = @_;
2915
2916         $git_dir = "$projectroot/$path";
2917         open my $fd, '<', "$git_dir/$name"
2918                 or return git_get_project_config($name);
2919         my $conf = <$fd>;
2920         close $fd;
2921         if (defined $conf) {
2922                 chomp $conf;
2923         }
2924         return $conf;
2925 }
2926
2927 sub git_get_project_description {
2928         my $path = shift;
2929         return git_get_file_or_project_config($path, 'description');
2930 }
2931
2932 sub git_get_project_category {
2933         my $path = shift;
2934         return git_get_file_or_project_config($path, 'category');
2935 }
2936
2937
2938 # supported formats:
2939 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2940 #   - if its contents is a number, use it as tag weight,
2941 #   - otherwise add a tag with weight 1
2942 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2943 #   the same value multiple times increases tag weight
2944 # * `gitweb.ctag' multi-valued repo config variable
2945 sub git_get_project_ctags {
2946         my $project = shift;
2947         my $ctags = {};
2948
2949         $git_dir = "$projectroot/$project";
2950         if (opendir my $dh, "$git_dir/ctags") {
2951                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2952                 foreach my $tagfile (@files) {
2953                         open my $ct, '<', $tagfile
2954                                 or next;
2955                         my $val = <$ct>;
2956                         chomp $val if $val;
2957                         close $ct;
2958
2959                         (my $ctag = $tagfile) =~ s#.*/##;
2960                         if ($val =~ /^\d+$/) {
2961                                 $ctags->{$ctag} = $val;
2962                         } else {
2963                                 $ctags->{$ctag} = 1;
2964                         }
2965                 }
2966                 closedir $dh;
2967
2968         } elsif (open my $fh, '<', "$git_dir/ctags") {
2969                 while (my $line = <$fh>) {
2970                         chomp $line;
2971                         $ctags->{$line}++ if $line;
2972                 }
2973                 close $fh;
2974
2975         } else {
2976                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2977                 foreach my $tag (@$taglist) {
2978                         $ctags->{$tag}++;
2979                 }
2980         }
2981
2982         return $ctags;
2983 }
2984
2985 # return hash, where keys are content tags ('ctags'),
2986 # and values are sum of weights of given tag in every project
2987 sub git_gather_all_ctags {
2988         my $projects = shift;
2989         my $ctags = {};
2990
2991         foreach my $p (@$projects) {
2992                 foreach my $ct (keys %{$p->{'ctags'}}) {
2993                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2994                 }
2995         }
2996
2997         return $ctags;
2998 }
2999
3000 sub git_populate_project_tagcloud {
3001         my $ctags = shift;
3002
3003         # First, merge different-cased tags; tags vote on casing
3004         my %ctags_lc;
3005         foreach (keys %$ctags) {
3006                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
3007                 if (not $ctags_lc{lc $_}->{topcount}
3008                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
3009                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
3010                         $ctags_lc{lc $_}->{topname} = $_;
3011                 }
3012         }
3013
3014         my $cloud;
3015         my $matched = $input_params{'ctag'};
3016         if (eval { require HTML::TagCloud; 1; }) {
3017                 $cloud = HTML::TagCloud->new;
3018                 foreach my $ctag (sort keys %ctags_lc) {
3019                         # Pad the title with spaces so that the cloud looks
3020                         # less crammed.
3021                         my $title = esc_html($ctags_lc{$ctag}->{topname});
3022                         $title =~ s/ /&nbsp;/g;
3023                         $title =~ s/^/&nbsp;/g;
3024                         $title =~ s/$/&nbsp;/g;
3025                         if (defined $matched && $matched eq $ctag) {
3026                                 $title = qq(<span class="match">$title</span>);
3027                         }
3028                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
3029                                     $ctags_lc{$ctag}->{count});
3030                 }
3031         } else {
3032                 $cloud = {};
3033                 foreach my $ctag (keys %ctags_lc) {
3034                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
3035                         if (defined $matched && $matched eq $ctag) {
3036                                 $title = qq(<span class="match">$title</span>);
3037                         }
3038                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
3039                         $cloud->{$ctag}{ctag} =
3040                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
3041                 }
3042         }
3043         return $cloud;
3044 }
3045
3046 sub git_show_project_tagcloud {
3047         my ($cloud, $count) = @_;
3048         if (ref $cloud eq 'HTML::TagCloud') {
3049                 return $cloud->html_and_css($count);
3050         } else {
3051                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
3052                 return
3053                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
3054                         join (', ', map {
3055                                 $cloud->{$_}->{'ctag'}
3056                         } splice(@tags, 0, $count)) .
3057                         '</div>';
3058         }
3059 }
3060
3061 sub git_get_project_url_list {
3062         my $path = shift;
3063
3064         $git_dir = "$projectroot/$path";
3065         open my $fd, '<', "$git_dir/cloneurl"
3066                 or return wantarray ?
3067                 @{ config_to_multi(git_get_project_config('url')) } :
3068                    config_to_multi(git_get_project_config('url'));
3069         my @git_project_url_list = map { chomp; $_ } <$fd>;
3070         close $fd;
3071
3072         return wantarray ? @git_project_url_list : \@git_project_url_list;
3073 }
3074
3075 sub git_get_projects_list {
3076         my $filter = shift || '';
3077         my $paranoid = shift;
3078         my @list;
3079
3080         if (-d $projects_list) {
3081                 # search in directory
3082                 my $dir = $projects_list;
3083                 # remove the trailing "/"
3084                 $dir =~ s!/+$!!;
3085                 my $pfxlen = length("$dir");
3086                 my $pfxdepth = ($dir =~ tr!/!!);
3087                 # when filtering, search only given subdirectory
3088                 if ($filter && !$paranoid) {
3089                         $dir .= "/$filter";
3090                         $dir =~ s!/+$!!;
3091                 }
3092
3093                 File::Find::find({
3094                         follow_fast => 1, # follow symbolic links
3095                         follow_skip => 2, # ignore duplicates
3096                         dangling_symlinks => 0, # ignore dangling symlinks, silently
3097                         wanted => sub {
3098                                 # global variables
3099                                 our $project_maxdepth;
3100                                 our $projectroot;
3101                                 # skip project-list toplevel, if we get it.
3102                                 return if (m!^[/.]$!);
3103                                 # only directories can be git repositories
3104                                 return unless (-d $_);
3105                                 # need search permission
3106                                 return unless (-x $_);
3107                                 # don't traverse too deep (Find is super slow on os x)
3108                                 # $project_maxdepth excludes depth of $projectroot
3109                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
3110                                         $File::Find::prune = 1;
3111                                         return;
3112                                 }
3113
3114                                 my $path = substr($File::Find::name, $pfxlen + 1);
3115                                 # paranoidly only filter here
3116                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
3117                                         next;
3118                                 }
3119                                 # we check related file in $projectroot
3120                                 if (check_export_ok("$projectroot/$path")) {
3121                                         push @list, { path => $path };
3122                                         $File::Find::prune = 1;
3123                                 }
3124                         },
3125                 }, "$dir");
3126
3127         } elsif (-f $projects_list) {
3128                 # read from file(url-encoded):
3129                 # 'git%2Fgit.git Linus+Torvalds'
3130                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3131                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3132                 open my $fd, '<', $projects_list or return;
3133         PROJECT:
3134                 while (my $line = <$fd>) {
3135                         chomp $line;
3136                         my ($path, $owner) = split ' ', $line;
3137                         $path = unescape($path);
3138                         $owner = unescape($owner);
3139                         if (!defined $path) {
3140                                 next;
3141                         }
3142                         # if $filter is rpovided, check if $path begins with $filter
3143                         if ($filter && $path !~ m!^\Q$filter\E/!) {
3144                                 next;
3145                         }
3146                         if (check_export_ok("$projectroot/$path")) {
3147                                 my $pr = {
3148                                         path => $path
3149                                 };
3150                                 if ($owner) {
3151                                         $pr->{'owner'} = to_utf8($owner);
3152                                 }
3153                                 push @list, $pr;
3154                         }
3155                 }
3156                 close $fd;
3157         }
3158         return @list;
3159 }
3160
3161 # written with help of Tree::Trie module (Perl Artistic License, GPL compatible)
3162 # as side effects it sets 'forks' field to list of forks for forked projects
3163 sub filter_forks_from_projects_list {
3164         my $projects = shift;
3165
3166         my %trie; # prefix tree of directories (path components)
3167         # generate trie out of those directories that might contain forks
3168         foreach my $pr (@$projects) {
3169                 my $path = $pr->{'path'};
3170                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3171                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3172                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
3173                 next unless (-d "$projectroot/$path"); # containing directory exists
3174                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
3175
3176                 # add to trie
3177                 my @dirs = split('/', $path);
3178                 # walk the trie, until either runs out of components or out of trie
3179                 my $ref = \%trie;
3180                 while (scalar @dirs &&
3181                        exists($ref->{$dirs[0]})) {
3182                         $ref = $ref->{shift @dirs};
3183                 }
3184                 # create rest of trie structure from rest of components
3185                 foreach my $dir (@dirs) {
3186                         $ref = $ref->{$dir} = {};
3187                 }
3188                 # create end marker, store $pr as a data
3189                 $ref->{''} = $pr if (!exists $ref->{''});
3190         }
3191
3192         # filter out forks, by finding shortest prefix match for paths
3193         my @filtered;
3194  PROJECT:
3195         foreach my $pr (@$projects) {
3196                 # trie lookup
3197                 my $ref = \%trie;
3198         DIR:
3199                 foreach my $dir (split('/', $pr->{'path'})) {
3200                         if (exists $ref->{''}) {
3201                                 # found [shortest] prefix, is a fork - skip it
3202                                 push @{$ref->{''}{'forks'}}, $pr;
3203                                 next PROJECT;
3204                         }
3205                         if (!exists $ref->{$dir}) {
3206                                 # not in trie, cannot have prefix, not a fork
3207                                 push @filtered, $pr;
3208                                 next PROJECT;
3209                         }
3210                         # If the dir is there, we just walk one step down the trie.
3211                         $ref = $ref->{$dir};
3212                 }
3213                 # we ran out of trie
3214                 # (shouldn't happen: it's either no match, or end marker)
3215                 push @filtered, $pr;
3216         }
3217
3218         return @filtered;
3219 }
3220
3221 # note: fill_project_list_info must be run first,
3222 # for 'descr_long' and 'ctags' to be filled
3223 sub search_projects_list {
3224         my ($projlist, %opts) = @_;
3225         my $tagfilter  = $opts{'tagfilter'};
3226         my $search_re = $opts{'search_regexp'};
3227
3228         return @$projlist
3229                 unless ($tagfilter || $search_re);
3230
3231         # searching projects require filling to be run before it;
3232         fill_project_list_info($projlist,
3233                                $tagfilter  ? 'ctags' : (),
3234                                $search_re ? ('path', 'descr') : ());
3235         my @projects;
3236  PROJECT:
3237         foreach my $pr (@$projlist) {
3238
3239                 if ($tagfilter) {
3240                         next unless ref($pr->{'ctags'}) eq 'HASH';
3241                         next unless
3242                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3243                 }
3244
3245                 if ($search_re) {
3246                         next unless
3247                                 $pr->{'path'} =~ /$search_re/ ||
3248                                 $pr->{'descr_long'} =~ /$search_re/;
3249                 }
3250
3251                 push @projects, $pr;
3252         }
3253
3254         return @projects;
3255 }
3256
3257 our $gitweb_project_owner = undef;
3258 sub git_get_project_list_from_file {
3259
3260         return if (defined $gitweb_project_owner);
3261
3262         $gitweb_project_owner = {};
3263         # read from file (url-encoded):
3264         # 'git%2Fgit.git Linus+Torvalds'
3265         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3266         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3267         if (-f $projects_list) {
3268                 open(my $fd, '<', $projects_list);
3269                 while (my $line = <$fd>) {
3270                         chomp $line;
3271                         my ($pr, $ow) = split ' ', $line;
3272                         $pr = unescape($pr);
3273                         $ow = unescape($ow);
3274                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3275                 }
3276                 close $fd;
3277         }
3278 }
3279
3280 sub git_get_project_owner {
3281         my $project = shift;
3282         my $owner;
3283
3284         return undef unless $project;
3285         $git_dir = "$projectroot/$project";
3286
3287         if (!defined $gitweb_project_owner) {
3288                 git_get_project_list_from_file();
3289         }
3290
3291         if (exists $gitweb_project_owner->{$project}) {
3292                 $owner = $gitweb_project_owner->{$project};
3293         }
3294         if (!defined $owner){
3295                 $owner = git_get_project_config('owner');
3296         }
3297         if (!defined $owner) {
3298                 $owner = get_file_owner("$git_dir");
3299         }
3300
3301         return $owner;
3302 }
3303
3304 sub git_get_last_activity {
3305         my ($path) = @_;
3306         my $fd;
3307
3308         $git_dir = "$projectroot/$path";
3309         open($fd, "-|", git_cmd(), 'for-each-ref',
3310              '--format=%(committer)',
3311              '--sort=-committerdate',
3312              '--count=1',
3313              map { "refs/$_" } get_branch_refs ()) or return;
3314         my $most_recent = <$fd>;
3315         close $fd or return;
3316         if (defined $most_recent &&
3317             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3318                 my $timestamp = $1;
3319                 my $age = time - $timestamp;
3320                 return ($age, age_string($age));
3321         }
3322         return (undef, undef);
3323 }
3324
3325 # Implementation note: when a single remote is wanted, we cannot use 'git
3326 # remote show -n' because that command always work (assuming it's a remote URL
3327 # if it's not defined), and we cannot use 'git remote show' because that would
3328 # try to make a network roundtrip. So the only way to find if that particular
3329 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3330 # and when we find what we want.
3331 sub git_get_remotes_list {
3332         my $wanted = shift;
3333         my %remotes = ();
3334
3335         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3336         return unless $fd;
3337         while (my $remote = <$fd>) {
3338                 chomp $remote;
3339                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3340                 next if $wanted and not $remote eq $wanted;
3341                 my ($url, $key) = ($1, $2);
3342
3343                 $remotes{$remote} ||= { 'heads' => () };
3344                 $remotes{$remote}{$key} = $url;
3345         }
3346         close $fd or return;
3347         return wantarray ? %remotes : \%remotes;
3348 }
3349
3350 # Takes a hash of remotes as first parameter and fills it by adding the
3351 # available remote heads for each of the indicated remotes.
3352 sub fill_remote_heads {
3353         my $remotes = shift;
3354         my @heads = map { "remotes/$_" } keys %$remotes;
3355         my @remoteheads = git_get_heads_list(undef, @heads);
3356         foreach my $remote (keys %$remotes) {
3357                 $remotes->{$remote}{'heads'} = [ grep {
3358                         $_->{'name'} =~ s!^$remote/!!
3359                         } @remoteheads ];
3360         }
3361 }
3362
3363 sub git_get_references {
3364         my $type = shift || "";
3365         my %refs;
3366         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3367         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3368         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3369                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3370                 or return;
3371
3372         while (my $line = <$fd>) {
3373                 chomp $line;
3374                 if ($line =~ m!^($oid_regex)\srefs/($type.*)$!) {
3375                         if (defined $refs{$1}) {
3376                                 push @{$refs{$1}}, $2;
3377                         } else {
3378                                 $refs{$1} = [ $2 ];
3379                         }
3380                 }
3381         }
3382         close $fd or return;
3383         return \%refs;
3384 }
3385
3386 sub git_get_rev_name_tags {
3387         my $hash = shift || return undef;
3388
3389         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3390                 or return;
3391         my $name_rev = <$fd>;
3392         close $fd;
3393
3394         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3395                 return $1;
3396         } else {
3397                 # catches also '$hash undefined' output
3398                 return undef;
3399         }
3400 }
3401
3402 ## ----------------------------------------------------------------------
3403 ## parse to hash functions
3404
3405 sub parse_date {
3406         my $epoch = shift;
3407         my $tz = shift || "-0000";
3408
3409         my %date;
3410         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3411         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3412         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3413         $date{'hour'} = $hour;
3414         $date{'minute'} = $min;
3415         $date{'mday'} = $mday;
3416         $date{'day'} = $days[$wday];
3417         $date{'month'} = $months[$mon];
3418         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3419                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3420         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3421                              $mday, $months[$mon], $hour ,$min;
3422         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3423                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3424
3425         my ($tz_sign, $tz_hour, $tz_min) =
3426                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3427         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3428         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3429         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3430         $date{'hour_local'} = $hour;
3431         $date{'minute_local'} = $min;
3432         $date{'tz_local'} = $tz;
3433         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3434                                   1900+$year, $mon+1, $mday,
3435                                   $hour, $min, $sec, $tz);
3436         return %date;
3437 }
3438
3439 sub parse_tag {
3440         my $tag_id = shift;
3441         my %tag;
3442         my @comment;
3443
3444         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3445         $tag{'id'} = $tag_id;
3446         while (my $line = <$fd>) {
3447                 chomp $line;
3448                 if ($line =~ m/^object ($oid_regex)$/) {
3449                         $tag{'object'} = $1;
3450                 } elsif ($line =~ m/^type (.+)$/) {
3451                         $tag{'type'} = $1;
3452                 } elsif ($line =~ m/^tag (.+)$/) {
3453                         $tag{'name'} = $1;
3454                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3455                         $tag{'author'} = $1;
3456                         $tag{'author_epoch'} = $2;
3457                         $tag{'author_tz'} = $3;
3458                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3459                                 $tag{'author_name'}  = $1;
3460                                 $tag{'author_email'} = $2;
3461                         } else {
3462                                 $tag{'author_name'} = $tag{'author'};
3463                         }
3464                 } elsif ($line =~ m/--BEGIN/) {
3465                         push @comment, $line;
3466                         last;
3467                 } elsif ($line eq "") {
3468                         last;
3469                 }
3470         }
3471         push @comment, <$fd>;
3472         $tag{'comment'} = \@comment;
3473         close $fd or return;
3474         if (!defined $tag{'name'}) {
3475                 return
3476         };
3477         return %tag
3478 }
3479
3480 sub parse_commit_text {
3481         my ($commit_text, $withparents) = @_;
3482         my @commit_lines = split '\n', $commit_text;
3483         my %co;
3484
3485         pop @commit_lines; # Remove '\0'
3486
3487         if (! @commit_lines) {
3488                 return;
3489         }
3490
3491         my $header = shift @commit_lines;
3492         if ($header !~ m/^$oid_regex/) {
3493                 return;
3494         }
3495         ($co{'id'}, my @parents) = split ' ', $header;
3496         while (my $line = shift @commit_lines) {
3497                 last if $line eq "\n";
3498                 if ($line =~ m/^tree ($oid_regex)$/) {
3499                         $co{'tree'} = $1;
3500                 } elsif ((!defined $withparents) && ($line =~ m/^parent ($oid_regex)$/)) {
3501                         push @parents, $1;
3502                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3503                         $co{'author'} = to_utf8($1);
3504                         $co{'author_epoch'} = $2;
3505                         $co{'author_tz'} = $3;
3506                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3507                                 $co{'author_name'}  = $1;
3508                                 $co{'author_email'} = $2;
3509                         } else {
3510                                 $co{'author_name'} = $co{'author'};
3511                         }
3512                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3513                         $co{'committer'} = to_utf8($1);
3514                         $co{'committer_epoch'} = $2;
3515                         $co{'committer_tz'} = $3;
3516                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3517                                 $co{'committer_name'}  = $1;
3518                                 $co{'committer_email'} = $2;
3519                         } else {
3520                                 $co{'committer_name'} = $co{'committer'};
3521                         }
3522                 }
3523         }
3524         if (!defined $co{'tree'}) {
3525                 return;
3526         };
3527         $co{'parents'} = \@parents;
3528         $co{'parent'} = $parents[0];
3529
3530         foreach my $title (@commit_lines) {
3531                 $title =~ s/^    //;
3532                 if ($title ne "") {
3533                         $co{'title'} = chop_str($title, 80, 5);
3534                         # remove leading stuff of merges to make the interesting part visible
3535                         if (length($title) > 50) {
3536                                 $title =~ s/^Automatic //;
3537                                 $title =~ s/^merge (of|with) /Merge ... /i;
3538                                 if (length($title) > 50) {
3539                                         $title =~ s/(http|rsync):\/\///;
3540                                 }
3541                                 if (length($title) > 50) {
3542                                         $title =~ s/(master|www|rsync)\.//;
3543                                 }
3544                                 if (length($title) > 50) {
3545                                         $title =~ s/kernel.org:?//;
3546                                 }
3547                                 if (length($title) > 50) {
3548                                         $title =~ s/\/pub\/scm//;
3549                                 }
3550                         }
3551                         $co{'title_short'} = chop_str($title, 50, 5);
3552                         last;
3553                 }
3554         }
3555         if (! defined $co{'title'} || $co{'title'} eq "") {
3556                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3557         }
3558         # remove added spaces
3559         foreach my $line (@commit_lines) {
3560                 $line =~ s/^    //;
3561         }
3562         $co{'comment'} = \@commit_lines;
3563
3564         my $age = time - $co{'committer_epoch'};
3565         $co{'age'} = $age;
3566         $co{'age_string'} = age_string($age);
3567         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3568         if ($age > 60*60*24*7*2) {
3569                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3570                 $co{'age_string_age'} = $co{'age_string'};
3571         } else {
3572                 $co{'age_string_date'} = $co{'age_string'};
3573                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3574         }
3575         return %co;
3576 }
3577
3578 sub parse_commit {
3579         my ($commit_id) = @_;
3580         my %co;
3581
3582         local $/ = "\0";
3583
3584         open my $fd, "-|", git_cmd(), "rev-list",
3585                 "--parents",
3586                 "--header",
3587                 "--max-count=1",
3588                 $commit_id,
3589                 "--",
3590                 or die_error(500, "Open git-rev-list failed");
3591         %co = parse_commit_text(<$fd>, 1);
3592         close $fd;
3593
3594         return %co;
3595 }
3596
3597 sub parse_commits {
3598         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3599         my @cos;
3600
3601         $maxcount ||= 1;
3602         $skip ||= 0;
3603
3604         local $/ = "\0";
3605
3606         open my $fd, "-|", git_cmd(), "rev-list",
3607                 "--header",
3608                 @args,
3609                 ("--max-count=" . $maxcount),
3610                 ("--skip=" . $skip),
3611                 @extra_options,
3612                 $commit_id,
3613                 "--",
3614                 ($filename ? ($filename) : ())
3615                 or die_error(500, "Open git-rev-list failed");
3616         while (my $line = <$fd>) {
3617                 my %co = parse_commit_text($line);
3618                 push @cos, \%co;
3619         }
3620         close $fd;
3621
3622         return wantarray ? @cos : \@cos;
3623 }
3624
3625 # parse line of git-diff-tree "raw" output
3626 sub parse_difftree_raw_line {
3627         my $line = shift;
3628         my %res;
3629
3630         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3631         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3632         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ($oid_regex) ($oid_regex) (.)([0-9]{0,3})\t(.*)$/) {
3633                 $res{'from_mode'} = $1;
3634                 $res{'to_mode'} = $2;
3635                 $res{'from_id'} = $3;
3636                 $res{'to_id'} = $4;
3637                 $res{'status'} = $5;
3638                 $res{'similarity'} = $6;
3639                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3640                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3641                 } else {
3642                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3643                 }
3644         }
3645         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3646         # combined diff (for merge commit)
3647         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:$oid_regex )+)([a-zA-Z]+)\t(.*)$//) {
3648                 $res{'nparents'}  = length($1);
3649                 $res{'from_mode'} = [ split(' ', $2) ];
3650                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3651                 $res{'from_id'} = [ split(' ', $3) ];
3652                 $res{'to_id'} = pop @{$res{'from_id'}};
3653                 $res{'status'} = [ split('', $4) ];
3654                 $res{'to_file'} = unquote($5);
3655         }
3656         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3657         elsif ($line =~ m/^($oid_regex)$/) {
3658                 $res{'commit'} = $1;
3659         }
3660
3661         return wantarray ? %res : \%res;
3662 }
3663
3664 # wrapper: return parsed line of git-diff-tree "raw" output
3665 # (the argument might be raw line, or parsed info)
3666 sub parsed_difftree_line {
3667         my $line_or_ref = shift;
3668
3669         if (ref($line_or_ref) eq "HASH") {
3670                 # pre-parsed (or generated by hand)
3671                 return $line_or_ref;
3672         } else {
3673                 return parse_difftree_raw_line($line_or_ref);
3674         }
3675 }
3676
3677 # parse line of git-ls-tree output
3678 sub parse_ls_tree_line {
3679         my $line = shift;
3680         my %opts = @_;
3681         my %res;
3682
3683         if ($opts{'-l'}) {
3684                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3685                 $line =~ m/^([0-9]+) (.+) ($oid_regex) +(-|[0-9]+)\t(.+)$/s;
3686
3687                 $res{'mode'} = $1;
3688                 $res{'type'} = $2;
3689                 $res{'hash'} = $3;
3690                 $res{'size'} = $4;
3691                 if ($opts{'-z'}) {
3692                         $res{'name'} = $5;
3693                 } else {
3694                         $res{'name'} = unquote($5);
3695                 }
3696         } else {
3697                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3698                 $line =~ m/^([0-9]+) (.+) ($oid_regex)\t(.+)$/s;
3699
3700                 $res{'mode'} = $1;
3701                 $res{'type'} = $2;
3702                 $res{'hash'} = $3;
3703                 if ($opts{'-z'}) {
3704                         $res{'name'} = $4;
3705                 } else {
3706                         $res{'name'} = unquote($4);
3707                 }
3708         }
3709
3710         return wantarray ? %res : \%res;
3711 }
3712
3713 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3714 sub parse_from_to_diffinfo {
3715         my ($diffinfo, $from, $to, @parents) = @_;
3716
3717         if ($diffinfo->{'nparents'}) {
3718                 # combined diff
3719                 $from->{'file'} = [];
3720                 $from->{'href'} = [];
3721                 fill_from_file_info($diffinfo, @parents)
3722                         unless exists $diffinfo->{'from_file'};
3723                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3724                         $from->{'file'}[$i] =
3725                                 defined $diffinfo->{'from_file'}[$i] ?
3726                                         $diffinfo->{'from_file'}[$i] :
3727                                         $diffinfo->{'to_file'};
3728                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3729                                 $from->{'href'}[$i] = href(action=>"blob",
3730                                                            hash_base=>$parents[$i],
3731                                                            hash=>$diffinfo->{'from_id'}[$i],
3732                                                            file_name=>$from->{'file'}[$i]);
3733                         } else {
3734                                 $from->{'href'}[$i] = undef;
3735                         }
3736                 }
3737         } else {
3738                 # ordinary (not combined) diff
3739                 $from->{'file'} = $diffinfo->{'from_file'};
3740                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3741                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3742                                                hash=>$diffinfo->{'from_id'},
3743                                                file_name=>$from->{'file'});
3744                 } else {
3745                         delete $from->{'href'};
3746                 }
3747         }
3748
3749         $to->{'file'} = $diffinfo->{'to_file'};
3750         if (!is_deleted($diffinfo)) { # file exists in result
3751                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3752                                      hash=>$diffinfo->{'to_id'},
3753                                      file_name=>$to->{'file'});
3754         } else {
3755                 delete $to->{'href'};
3756         }
3757 }
3758
3759 ## ......................................................................
3760 ## parse to array of hashes functions
3761
3762 sub git_get_heads_list {
3763         my ($limit, @classes) = @_;
3764         @classes = get_branch_refs() unless @classes;
3765         my @patterns = map { "refs/$_" } @classes;
3766         my @headslist;
3767
3768         open my $fd, '-|', git_cmd(), 'for-each-ref',
3769                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3770                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3771                 @patterns
3772                 or return;
3773         while (my $line = <$fd>) {
3774                 my %ref_item;
3775
3776                 chomp $line;
3777                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3778                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3779                 my ($committer, $epoch, $tz) =
3780                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3781                 $ref_item{'fullname'}  = $name;
3782                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
3783                 $name =~ s!^refs/($strip_refs|remotes)/!!;
3784                 $ref_item{'name'} = $name;
3785                 # for refs neither in 'heads' nor 'remotes' we want to
3786                 # show their ref dir
3787                 my $ref_dir = (defined $1) ? $1 : '';
3788                 if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
3789                     $ref_item{'name'} .= ' (' . $ref_dir . ')';
3790                 }
3791
3792                 $ref_item{'id'}    = $hash;
3793                 $ref_item{'title'} = $title || '(no commit message)';
3794                 $ref_item{'epoch'} = $epoch;
3795                 if ($epoch) {
3796                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3797                 } else {
3798                         $ref_item{'age'} = "unknown";
3799                 }
3800
3801                 push @headslist, \%ref_item;
3802         }
3803         close $fd;
3804
3805         return wantarray ? @headslist : \@headslist;
3806 }
3807
3808 sub git_get_tags_list {
3809         my $limit = shift;
3810         my @tagslist;
3811
3812         open my $fd, '-|', git_cmd(), 'for-each-ref',
3813                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3814                 '--format=%(objectname) %(objecttype) %(refname) '.
3815                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3816                 'refs/tags'
3817                 or return;
3818         while (my $line = <$fd>) {
3819                 my %ref_item;
3820
3821                 chomp $line;
3822                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3823                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3824                 my ($creator, $epoch, $tz) =
3825                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3826                 $ref_item{'fullname'} = $name;
3827                 $name =~ s!^refs/tags/!!;
3828
3829                 $ref_item{'type'} = $type;
3830                 $ref_item{'id'} = $id;
3831                 $ref_item{'name'} = $name;
3832                 if ($type eq "tag") {
3833                         $ref_item{'subject'} = $title;
3834                         $ref_item{'reftype'} = $reftype;
3835                         $ref_item{'refid'}   = $refid;
3836                 } else {
3837                         $ref_item{'reftype'} = $type;
3838                         $ref_item{'refid'}   = $id;
3839                 }
3840
3841                 if ($type eq "tag" || $type eq "commit") {
3842                         $ref_item{'epoch'} = $epoch;
3843                         if ($epoch) {
3844                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3845                         } else {
3846                                 $ref_item{'age'} = "unknown";
3847                         }
3848                 }
3849
3850                 push @tagslist, \%ref_item;
3851         }
3852         close $fd;
3853
3854         return wantarray ? @tagslist : \@tagslist;
3855 }
3856
3857 ## ----------------------------------------------------------------------
3858 ## filesystem-related functions
3859
3860 sub get_file_owner {
3861         my $path = shift;
3862
3863         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3864         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3865         if (!defined $gcos) {
3866                 return undef;
3867         }
3868         my $owner = $gcos;
3869         $owner =~ s/[,;].*$//;
3870         return to_utf8($owner);
3871 }
3872
3873 # assume that file exists
3874 sub insert_file {
3875         my $filename = shift;
3876
3877         open my $fd, '<', $filename;
3878         print map { to_utf8($_) } <$fd>;
3879         close $fd;
3880 }
3881
3882 ## ......................................................................
3883 ## mimetype related functions
3884
3885 sub mimetype_guess_file {
3886         my $filename = shift;
3887         my $mimemap = shift;
3888         -r $mimemap or return undef;
3889
3890         my %mimemap;
3891         open(my $mh, '<', $mimemap) or return undef;
3892         while (<$mh>) {
3893                 next if m/^#/; # skip comments
3894                 my ($mimetype, @exts) = split(/\s+/);
3895                 foreach my $ext (@exts) {
3896                         $mimemap{$ext} = $mimetype;
3897                 }
3898         }
3899         close($mh);
3900
3901         $filename =~ /\.([^.]*)$/;
3902         return $mimemap{$1};
3903 }
3904
3905 sub mimetype_guess {
3906         my $filename = shift;
3907         my $mime;
3908         $filename =~ /\./ or return undef;
3909
3910         if ($mimetypes_file) {
3911                 my $file = $mimetypes_file;
3912                 if ($file !~ m!^/!) { # if it is relative path
3913                         # it is relative to project
3914                         $file = "$projectroot/$project/$file";
3915                 }
3916                 $mime = mimetype_guess_file($filename, $file);
3917         }
3918         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3919         return $mime;
3920 }
3921
3922 sub blob_mimetype {
3923         my $fd = shift;
3924         my $filename = shift;
3925
3926         if ($filename) {
3927                 my $mime = mimetype_guess($filename);
3928                 $mime and return $mime;
3929         }
3930
3931         # just in case
3932         return $default_blob_plain_mimetype unless $fd;
3933
3934         if (-T $fd) {
3935                 return 'text/plain';
3936         } elsif (! $filename) {
3937                 return 'application/octet-stream';
3938         } elsif ($filename =~ m/\.png$/i) {
3939                 return 'image/png';
3940         } elsif ($filename =~ m/\.gif$/i) {
3941                 return 'image/gif';
3942         } elsif ($filename =~ m/\.jpe?g$/i) {
3943                 return 'image/jpeg';
3944         } else {
3945                 return 'application/octet-stream';
3946         }
3947 }
3948
3949 sub blob_contenttype {
3950         my ($fd, $file_name, $type) = @_;
3951
3952         $type ||= blob_mimetype($fd, $file_name);
3953         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3954                 $type .= "; charset=$default_text_plain_charset";
3955         }
3956
3957         return $type;
3958 }
3959
3960 # guess file syntax for syntax highlighting; return undef if no highlighting
3961 # the name of syntax can (in the future) depend on syntax highlighter used
3962 sub guess_file_syntax {
3963         my ($highlight, $file_name) = @_;
3964         return undef unless ($highlight && defined $file_name);
3965         my $basename = basename($file_name, '.in');
3966         return $highlight_basename{$basename}
3967                 if exists $highlight_basename{$basename};
3968
3969         $basename =~ /\.([^.]*)$/;
3970         my $ext = $1 or return undef;
3971         return $highlight_ext{$ext}
3972                 if exists $highlight_ext{$ext};
3973
3974         return undef;
3975 }
3976
3977 # run highlighter and return FD of its output,
3978 # or return original FD if no highlighting
3979 sub run_highlighter {
3980         my ($fd, $highlight, $syntax) = @_;
3981         return $fd unless ($highlight);
3982
3983         close $fd;
3984         my $syntax_arg = (defined $syntax) ? "--syntax $syntax" : "--force";
3985         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3986                   quote_command($^X, '-CO', '-MEncode=decode,FB_DEFAULT', '-pse',
3987                     '$_ = decode($fe, $_, FB_DEFAULT) if !utf8::decode($_);',
3988                     '--', "-fe=$fallback_encoding")." | ".
3989                   quote_command($highlight_bin).
3990                   " --replace-tabs=8 --fragment $syntax_arg |"
3991                 or die_error(500, "Couldn't open file or run syntax highlighter");
3992         return $fd;
3993 }
3994
3995 ## ======================================================================
3996 ## functions printing HTML: header, footer, error page
3997
3998 sub get_page_title {
3999         my $title = to_utf8($site_name);
4000
4001         unless (defined $project) {
4002                 if (defined $project_filter) {
4003                         $title .= " - projects in '" . esc_path($project_filter) . "'";
4004                 }
4005                 return $title;
4006         }
4007         $title .= " - " . to_utf8($project);
4008
4009         return $title unless (defined $action);
4010         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
4011
4012         return $title unless (defined $file_name);
4013         $title .= " - " . esc_path($file_name);
4014         if ($action eq "tree" && $file_name !~ m|/$|) {
4015                 $title .= "/";
4016         }
4017
4018         return $title;
4019 }
4020
4021 sub get_content_type_html {
4022         # require explicit support from the UA if we are to send the page as
4023         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
4024         # we have to do this because MSIE sometimes globs '*/*', pretending to
4025         # support xhtml+xml but choking when it gets what it asked for.
4026         if (defined $cgi->http('HTTP_ACCEPT') &&
4027             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
4028             $cgi->Accept('application/xhtml+xml') != 0) {
4029                 return 'application/xhtml+xml';
4030         } else {
4031                 return 'text/html';
4032         }
4033 }
4034
4035 sub print_feed_meta {
4036         if (defined $project) {
4037                 my %href_params = get_feed_info();
4038                 if (!exists $href_params{'-title'}) {
4039                         $href_params{'-title'} = 'log';
4040                 }
4041
4042                 foreach my $format (qw(RSS Atom)) {
4043                         my $type = lc($format);
4044                         my %link_attr = (
4045                                 '-rel' => 'alternate',
4046                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
4047                                 '-type' => "application/$type+xml"
4048                         );
4049
4050                         $href_params{'extra_options'} = undef;
4051                         $href_params{'action'} = $type;
4052                         $link_attr{'-href'} = href(%href_params);
4053                         print "<link ".
4054                               "rel=\"$link_attr{'-rel'}\" ".
4055                               "title=\"$link_attr{'-title'}\" ".
4056                               "href=\"$link_attr{'-href'}\" ".
4057                               "type=\"$link_attr{'-type'}\" ".
4058                               "/>\n";
4059
4060                         $href_params{'extra_options'} = '--no-merges';
4061                         $link_attr{'-href'} = href(%href_params);
4062                         $link_attr{'-title'} .= ' (no merges)';
4063                         print "<link ".
4064                               "rel=\"$link_attr{'-rel'}\" ".
4065                               "title=\"$link_attr{'-title'}\" ".
4066                               "href=\"$link_attr{'-href'}\" ".
4067                               "type=\"$link_attr{'-type'}\" ".
4068                               "/>\n";
4069                 }
4070
4071         } else {
4072                 printf('<link rel="alternate" title="%s projects list" '.
4073                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
4074                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
4075                 printf('<link rel="alternate" title="%s projects feeds" '.
4076                        'href="%s" type="text/x-opml" />'."\n",
4077                        esc_attr($site_name), href(project=>undef, action=>"opml"));
4078         }
4079 }
4080
4081 sub print_header_links {
4082         my $status = shift;
4083
4084         # print out each stylesheet that exist, providing backwards capability
4085         # for those people who defined $stylesheet in a config file
4086         if (defined $stylesheet) {
4087                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4088         } else {
4089                 foreach my $stylesheet (@stylesheets) {
4090                         next unless $stylesheet;
4091                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4092                 }
4093         }
4094         print_feed_meta()
4095                 if ($status eq '200 OK');
4096         if (defined $favicon) {
4097                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
4098         }
4099 }
4100
4101 sub print_nav_breadcrumbs_path {
4102         my $dirprefix = undef;
4103         while (my $part = shift) {
4104                 $dirprefix .= "/" if defined $dirprefix;
4105                 $dirprefix .= $part;
4106                 print $cgi->a({-href => href(project => undef,
4107                                              project_filter => $dirprefix,
4108                                              action => "project_list")},
4109                               esc_html($part)) . " / ";
4110         }
4111 }
4112
4113 sub print_nav_breadcrumbs {
4114         my %opts = @_;
4115
4116         for my $crumb (@extra_breadcrumbs, [ $home_link_str => $home_link ]) {
4117                 print $cgi->a({-href => esc_url($crumb->[1])}, $crumb->[0]) . " / ";
4118         }
4119         if (defined $project) {
4120                 my @dirname = split '/', $project;
4121                 my $projectbasename = pop @dirname;
4122                 print_nav_breadcrumbs_path(@dirname);
4123                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
4124                 if (defined $action) {
4125                         my $action_print = $action ;
4126                         if (defined $opts{-action_extra}) {
4127                                 $action_print = $cgi->a({-href => href(action=>$action)},
4128                                         $action);
4129                         }
4130                         print " / $action_print";
4131                 }
4132                 if (defined $opts{-action_extra}) {
4133                         print " / $opts{-action_extra}";
4134                 }
4135                 print "\n";
4136         } elsif (defined $project_filter) {
4137                 print_nav_breadcrumbs_path(split '/', $project_filter);
4138         }
4139 }
4140
4141 sub print_search_form {
4142         if (!defined $searchtext) {
4143                 $searchtext = "";
4144         }
4145         my $search_hash;
4146         if (defined $hash_base) {
4147                 $search_hash = $hash_base;
4148         } elsif (defined $hash) {
4149                 $search_hash = $hash;
4150         } else {
4151                 $search_hash = "HEAD";
4152         }
4153         my $action = $my_uri;
4154         my $use_pathinfo = gitweb_check_feature('pathinfo');
4155         if ($use_pathinfo) {
4156                 $action .= "/".esc_url($project);
4157         }
4158         print $cgi->start_form(-method => "get", -action => $action) .
4159               "<div class=\"search\">\n" .
4160               (!$use_pathinfo &&
4161               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4162               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4163               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4164               $cgi->popup_menu(-name => 'st', -default => 'commit',
4165                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4166               " " . $cgi->a({-href => href(action=>"search_help"),
4167                              -title => "search help" }, "?") . " search:\n",
4168               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4169               "<span title=\"Extended regular expression\">" .
4170               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4171                              -checked => $search_use_regexp) .
4172               "</span>" .
4173               "</div>" .
4174               $cgi->end_form() . "\n";
4175 }
4176
4177 sub git_header_html {
4178         my $status = shift || "200 OK";
4179         my $expires = shift;
4180         my %opts = @_;
4181
4182         my $title = get_page_title();
4183         my $content_type = get_content_type_html();
4184         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4185                            -status=> $status, -expires => $expires)
4186                 unless ($opts{'-no_http_header'});
4187         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4188         print <<EOF;
4189 <?xml version="1.0" encoding="utf-8"?>
4190 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4191 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4192 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4193 <!-- git core binaries version $git_version -->
4194 <head>
4195 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4196 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4197 <meta name="robots" content="index, nofollow"/>
4198 <title>$title</title>
4199 EOF
4200         # the stylesheet, favicon etc urls won't work correctly with path_info
4201         # unless we set the appropriate base URL
4202         if ($ENV{'PATH_INFO'}) {
4203                 print "<base href=\"".esc_url($base_url)."\" />\n";
4204         }
4205         print_header_links($status);
4206
4207         if (defined $site_html_head_string) {
4208                 print to_utf8($site_html_head_string);
4209         }
4210
4211         print "</head>\n" .
4212               "<body>\n";
4213
4214         if (defined $site_header && -f $site_header) {
4215                 insert_file($site_header);
4216         }
4217
4218         print "<div class=\"page_header\">\n";
4219         if (defined $logo) {
4220                 print $cgi->a({-href => esc_url($logo_url),
4221                                -title => $logo_label},
4222                               $cgi->img({-src => esc_url($logo),
4223                                          -width => 72, -height => 27,
4224                                          -alt => "git",
4225                                          -class => "logo"}));
4226         }
4227         print_nav_breadcrumbs(%opts);
4228         print "</div>\n";
4229
4230         my $have_search = gitweb_check_feature('search');
4231         if (defined $project && $have_search) {
4232                 print_search_form();
4233         }
4234 }
4235
4236 sub git_footer_html {
4237         my $feed_class = 'rss_logo';
4238
4239         print "<div class=\"page_footer\">\n";
4240         if (defined $project) {
4241                 my $descr = git_get_project_description($project);
4242                 if (defined $descr) {
4243                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4244                 }
4245
4246                 my %href_params = get_feed_info();
4247                 if (!%href_params) {
4248                         $feed_class .= ' generic';
4249                 }
4250                 $href_params{'-title'} ||= 'log';
4251
4252                 foreach my $format (qw(RSS Atom)) {
4253                         $href_params{'action'} = lc($format);
4254                         print $cgi->a({-href => href(%href_params),
4255                                       -title => "$href_params{'-title'} $format feed",
4256                                       -class => $feed_class}, $format)."\n";
4257                 }
4258
4259         } else {
4260                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4261                                              project_filter => $project_filter),
4262                               -class => $feed_class}, "OPML") . " ";
4263                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4264                                              project_filter => $project_filter),
4265                               -class => $feed_class}, "TXT") . "\n";
4266         }
4267         print "</div>\n"; # class="page_footer"
4268
4269         if (defined $t0 && gitweb_check_feature('timed')) {
4270                 print "<div id=\"generating_info\">\n";
4271                 print 'This page took '.
4272                       '<span id="generating_time" class="time_span">'.
4273                       tv_interval($t0, [ gettimeofday() ]).
4274                       ' seconds </span>'.
4275                       ' and '.
4276                       '<span id="generating_cmd">'.
4277                       $number_of_git_cmds.
4278                       '</span> git commands '.
4279                       " to generate.\n";
4280                 print "</div>\n"; # class="page_footer"
4281         }
4282
4283         if (defined $site_footer && -f $site_footer) {
4284                 insert_file($site_footer);
4285         }
4286
4287         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4288         if (defined $action &&
4289             $action eq 'blame_incremental') {
4290                 print qq!<script type="text/javascript">\n!.
4291                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4292                       qq!           "!. href() .qq!");\n!.
4293                       qq!</script>\n!;
4294         } else {
4295                 my ($jstimezone, $tz_cookie, $datetime_class) =
4296                         gitweb_get_feature('javascript-timezone');
4297
4298                 print qq!<script type="text/javascript">\n!.
4299                       qq!window.onload = function () {\n!;
4300                 if (gitweb_check_feature('javascript-actions')) {
4301                         print qq!       fixLinks();\n!;
4302                 }
4303                 if ($jstimezone && $tz_cookie && $datetime_class) {
4304                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4305                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4306                 }
4307                 print qq!};\n!.
4308                       qq!</script>\n!;
4309         }
4310
4311         print "</body>\n" .
4312               "</html>";
4313 }
4314
4315 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4316 # Example: die_error(404, 'Hash not found')
4317 # By convention, use the following status codes (as defined in RFC 2616):
4318 # 400: Invalid or missing CGI parameters, or
4319 #      requested object exists but has wrong type.
4320 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4321 #      this server or project.
4322 # 404: Requested object/revision/project doesn't exist.
4323 # 500: The server isn't configured properly, or
4324 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4325 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4326 # 503: The server is currently unavailable (because it is overloaded,
4327 #      or down for maintenance).  Generally, this is a temporary state.
4328 sub die_error {
4329         my $status = shift || 500;
4330         my $error = esc_html(shift) || "Internal Server Error";
4331         my $extra = shift;
4332         my %opts = @_;
4333
4334         my %http_responses = (
4335                 400 => '400 Bad Request',
4336                 403 => '403 Forbidden',
4337                 404 => '404 Not Found',
4338                 500 => '500 Internal Server Error',
4339                 503 => '503 Service Unavailable',
4340         );
4341         git_header_html($http_responses{$status}, undef, %opts);
4342         print <<EOF;
4343 <div class="page_body">
4344 <br /><br />
4345 $status - $error
4346 <br />
4347 EOF
4348         if (defined $extra) {
4349                 print "<hr />\n" .
4350                       "$extra\n";
4351         }
4352         print "</div>\n";
4353
4354         git_footer_html();
4355         goto DONE_GITWEB
4356                 unless ($opts{'-error_handler'});
4357 }
4358
4359 ## ----------------------------------------------------------------------
4360 ## functions printing or outputting HTML: navigation
4361
4362 sub git_print_page_nav {
4363         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4364         $extra = '' if !defined $extra; # pager or formats
4365
4366         my @navs = qw(summary shortlog log commit commitdiff tree);
4367         if ($suppress) {
4368                 @navs = grep { $_ ne $suppress } @navs;
4369         }
4370
4371         my %arg = map { $_ => {action=>$_} } @navs;
4372         if (defined $head) {
4373                 for (qw(commit commitdiff)) {
4374                         $arg{$_}{'hash'} = $head;
4375                 }
4376                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4377                         for (qw(shortlog log)) {
4378                                 $arg{$_}{'hash'} = $head;
4379                         }
4380                 }
4381         }
4382
4383         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4384         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4385
4386         my @actions = gitweb_get_feature('actions');
4387         my %repl = (
4388                 '%' => '%',
4389                 'n' => $project,         # project name
4390                 'f' => $git_dir,         # project path within filesystem
4391                 'h' => $treehead || '',  # current hash ('h' parameter)
4392                 'b' => $treebase || '',  # hash base ('hb' parameter)
4393         );
4394         while (@actions) {
4395                 my ($label, $link, $pos) = splice(@actions,0,3);
4396                 # insert
4397                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4398                 # munch munch
4399                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4400                 $arg{$label}{'_href'} = $link;
4401         }
4402
4403         print "<div class=\"page_nav\">\n" .
4404                 (join " | ",
4405                  map { $_ eq $current ?
4406                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4407                  } @navs);
4408         print "<br/>\n$extra<br/>\n" .
4409               "</div>\n";
4410 }
4411
4412 # returns a submenu for the navigation of the refs views (tags, heads,
4413 # remotes) with the current view disabled and the remotes view only
4414 # available if the feature is enabled
4415 sub format_ref_views {
4416         my ($current) = @_;
4417         my @ref_views = qw{tags heads};
4418         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4419         return join " | ", map {
4420                 $_ eq $current ? $_ :
4421                 $cgi->a({-href => href(action=>$_)}, $_)
4422         } @ref_views
4423 }
4424
4425 sub format_paging_nav {
4426         my ($action, $page, $has_next_link) = @_;
4427         my $paging_nav;
4428
4429
4430         if ($page > 0) {
4431                 $paging_nav .=
4432                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4433                         " &sdot; " .
4434                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4435                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4436         } else {
4437                 $paging_nav .= "first &sdot; prev";
4438         }
4439
4440         if ($has_next_link) {
4441                 $paging_nav .= " &sdot; " .
4442                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4443                                  -accesskey => "n", -title => "Alt-n"}, "next");
4444         } else {
4445                 $paging_nav .= " &sdot; next";
4446         }
4447
4448         return $paging_nav;
4449 }
4450
4451 ## ......................................................................
4452 ## functions printing or outputting HTML: div
4453
4454 sub git_print_header_div {
4455         my ($action, $title, $hash, $hash_base) = @_;
4456         my %args = ();
4457
4458         $args{'action'} = $action;
4459         $args{'hash'} = $hash if $hash;
4460         $args{'hash_base'} = $hash_base if $hash_base;
4461
4462         print "<div class=\"header\">\n" .
4463               $cgi->a({-href => href(%args), -class => "title"},
4464               $title ? $title : $action) .
4465               "\n</div>\n";
4466 }
4467
4468 sub format_repo_url {
4469         my ($name, $url) = @_;
4470         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4471 }
4472
4473 # Group output by placing it in a DIV element and adding a header.
4474 # Options for start_div() can be provided by passing a hash reference as the
4475 # first parameter to the function.
4476 # Options to git_print_header_div() can be provided by passing an array
4477 # reference. This must follow the options to start_div if they are present.
4478 # The content can be a scalar, which is output as-is, a scalar reference, which
4479 # is output after html escaping, an IO handle passed either as *handle or
4480 # *handle{IO}, or a function reference. In the latter case all following
4481 # parameters will be taken as argument to the content function call.
4482 sub git_print_section {
4483         my ($div_args, $header_args, $content);
4484         my $arg = shift;
4485         if (ref($arg) eq 'HASH') {
4486                 $div_args = $arg;
4487                 $arg = shift;
4488         }
4489         if (ref($arg) eq 'ARRAY') {
4490                 $header_args = $arg;
4491                 $arg = shift;
4492         }
4493         $content = $arg;
4494
4495         print $cgi->start_div($div_args);
4496         git_print_header_div(@$header_args);
4497
4498         if (ref($content) eq 'CODE') {
4499                 $content->(@_);
4500         } elsif (ref($content) eq 'SCALAR') {
4501                 print esc_html($$content);
4502         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4503                 print <$content>;
4504         } elsif (!ref($content) && defined($content)) {
4505                 print $content;
4506         }
4507
4508         print $cgi->end_div;
4509 }
4510
4511 sub format_timestamp_html {
4512         my $date = shift;
4513         my $strtime = $date->{'rfc2822'};
4514
4515         my (undef, undef, $datetime_class) =
4516                 gitweb_get_feature('javascript-timezone');
4517         if ($datetime_class) {
4518                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4519         }
4520
4521         my $localtime_format = '(%02d:%02d %s)';
4522         if ($date->{'hour_local'} < 6) {
4523                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4524         }
4525         $strtime .= ' ' .
4526                     sprintf($localtime_format,
4527                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4528
4529         return $strtime;
4530 }
4531
4532 # Outputs the author name and date in long form
4533 sub git_print_authorship {
4534         my $co = shift;
4535         my %opts = @_;
4536         my $tag = $opts{-tag} || 'div';
4537         my $author = $co->{'author_name'};
4538
4539         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4540         print "<$tag class=\"author_date\">" .
4541               format_search_author($author, "author", esc_html($author)) .
4542               " [".format_timestamp_html(\%ad)."]".
4543               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4544               "</$tag>\n";
4545 }
4546
4547 # Outputs table rows containing the full author or committer information,
4548 # in the format expected for 'commit' view (& similar).
4549 # Parameters are a commit hash reference, followed by the list of people
4550 # to output information for. If the list is empty it defaults to both
4551 # author and committer.
4552 sub git_print_authorship_rows {
4553         my $co = shift;
4554         # too bad we can't use @people = @_ || ('author', 'committer')
4555         my @people = @_;
4556         @people = ('author', 'committer') unless @people;
4557         foreach my $who (@people) {
4558                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4559                 print "<tr><td>$who</td><td>" .
4560                       format_search_author($co->{"${who}_name"}, $who,
4561                                            esc_html($co->{"${who}_name"})) . " " .
4562                       format_search_author($co->{"${who}_email"}, $who,
4563                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4564                       "</td><td rowspan=\"2\">" .
4565                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4566                       "</td></tr>\n" .
4567                       "<tr>" .
4568                       "<td></td><td>" .
4569                       format_timestamp_html(\%wd) .
4570                       "</td>" .
4571                       "</tr>\n";
4572         }
4573 }
4574
4575 sub git_print_page_path {
4576         my $name = shift;
4577         my $type = shift;
4578         my $hb = shift;
4579
4580
4581         print "<div class=\"page_path\">";
4582         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4583                       -title => 'tree root'}, to_utf8("[$project]"));
4584         print " / ";
4585         if (defined $name) {
4586                 my @dirname = split '/', $name;
4587                 my $basename = pop @dirname;
4588                 my $fullname = '';
4589
4590                 foreach my $dir (@dirname) {
4591                         $fullname .= ($fullname ? '/' : '') . $dir;
4592                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4593                                                      hash_base=>$hb),
4594                                       -title => $fullname}, esc_path($dir));
4595                         print " / ";
4596                 }
4597                 if (defined $type && $type eq 'blob') {
4598                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4599                                                      hash_base=>$hb),
4600                                       -title => $name}, esc_path($basename));
4601                 } elsif (defined $type && $type eq 'tree') {
4602                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4603                                                      hash_base=>$hb),
4604                                       -title => $name}, esc_path($basename));
4605                         print " / ";
4606                 } else {
4607                         print esc_path($basename);
4608                 }
4609         }
4610         print "<br/></div>\n";
4611 }
4612
4613 sub git_print_log {
4614         my $log = shift;
4615         my %opts = @_;
4616
4617         if ($opts{'-remove_title'}) {
4618                 # remove title, i.e. first line of log
4619                 shift @$log;
4620         }
4621         # remove leading empty lines
4622         while (defined $log->[0] && $log->[0] eq "") {
4623                 shift @$log;
4624         }
4625
4626         # print log
4627         my $skip_blank_line = 0;
4628         foreach my $line (@$log) {
4629                 if ($line =~ m/^\s*([A-Z][-A-Za-z]*-[Bb]y|C[Cc]): /) {
4630                         if (! $opts{'-remove_signoff'}) {
4631                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4632                                 $skip_blank_line = 1;
4633                         }
4634                         next;
4635                 }
4636
4637                 if ($line =~ m,\s*([a-z]*link): (https?://\S+),i) {
4638                         if (! $opts{'-remove_signoff'}) {
4639                                 print "<span class=\"signoff\">" . esc_html($1) . ": " .
4640                                         "<a href=\"" . esc_html($2) . "\">" . esc_html($2) . "</a>" .
4641                                         "</span><br/>\n";
4642                                 $skip_blank_line = 1;
4643                         }
4644                         next;
4645                 }
4646
4647                 # print only one empty line
4648                 # do not print empty line after signoff
4649                 if ($line eq "") {
4650                         next if ($skip_blank_line);
4651                         $skip_blank_line = 1;
4652                 } else {
4653                         $skip_blank_line = 0;
4654                 }
4655
4656                 print format_log_line_html($line) . "<br/>\n";
4657         }
4658
4659         if ($opts{'-final_empty_line'}) {
4660                 # end with single empty line
4661                 print "<br/>\n" unless $skip_blank_line;
4662         }
4663 }
4664
4665 # return link target (what link points to)
4666 sub git_get_link_target {
4667         my $hash = shift;
4668         my $link_target;
4669
4670         # read link
4671         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4672                 or return;
4673         {
4674                 local $/ = undef;
4675                 $link_target = <$fd>;
4676         }
4677         close $fd
4678                 or return;
4679
4680         return $link_target;
4681 }
4682
4683 # given link target, and the directory (basedir) the link is in,
4684 # return target of link relative to top directory (top tree);
4685 # return undef if it is not possible (including absolute links).
4686 sub normalize_link_target {
4687         my ($link_target, $basedir) = @_;
4688
4689         # absolute symlinks (beginning with '/') cannot be normalized
4690         return if (substr($link_target, 0, 1) eq '/');
4691
4692         # normalize link target to path from top (root) tree (dir)
4693         my $path;
4694         if ($basedir) {
4695                 $path = $basedir . '/' . $link_target;
4696         } else {
4697                 # we are in top (root) tree (dir)
4698                 $path = $link_target;
4699         }
4700
4701         # remove //, /./, and /../
4702         my @path_parts;
4703         foreach my $part (split('/', $path)) {
4704                 # discard '.' and ''
4705                 next if (!$part || $part eq '.');
4706                 # handle '..'
4707                 if ($part eq '..') {
4708                         if (@path_parts) {
4709                                 pop @path_parts;
4710                         } else {
4711                                 # link leads outside repository (outside top dir)
4712                                 return;
4713                         }
4714                 } else {
4715                         push @path_parts, $part;
4716                 }
4717         }
4718         $path = join('/', @path_parts);
4719
4720         return $path;
4721 }
4722
4723 # print tree entry (row of git_tree), but without encompassing <tr> element
4724 sub git_print_tree_entry {
4725         my ($t, $basedir, $hash_base, $have_blame) = @_;
4726
4727         my %base_key = ();
4728         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4729
4730         # The format of a table row is: mode list link.  Where mode is
4731         # the mode of the entry, list is the name of the entry, an href,
4732         # and link is the action links of the entry.
4733
4734         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4735         if (exists $t->{'size'}) {
4736                 print "<td class=\"size\">$t->{'size'}</td>\n";
4737         }
4738         if ($t->{'type'} eq "blob") {
4739                 print "<td class=\"list\">" .
4740                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4741                                                file_name=>"$basedir$t->{'name'}", %base_key),
4742                                 -class => "list"}, esc_path($t->{'name'}));
4743                 if (S_ISLNK(oct $t->{'mode'})) {
4744                         my $link_target = git_get_link_target($t->{'hash'});
4745                         if ($link_target) {
4746                                 my $norm_target = normalize_link_target($link_target, $basedir);
4747                                 if (defined $norm_target) {
4748                                         print " -> " .
4749                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4750                                                                      file_name=>$norm_target),
4751                                                        -title => $norm_target}, esc_path($link_target));
4752                                 } else {
4753                                         print " -> " . esc_path($link_target);
4754                                 }
4755                         }
4756                 }
4757                 print "</td>\n";
4758                 print "<td class=\"link\">";
4759                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4760                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4761                               "blob");
4762                 if ($have_blame) {
4763                         print " | " .
4764                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4765                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4766                                       "blame");
4767                 }
4768                 if (defined $hash_base) {
4769                         print " | " .
4770                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4771                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4772                                       "history");
4773                 }
4774                 print " | " .
4775                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4776                                                file_name=>"$basedir$t->{'name'}")},
4777                                 "raw");
4778                 print "</td>\n";
4779
4780         } elsif ($t->{'type'} eq "tree") {
4781                 print "<td class=\"list\">";
4782                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4783                                              file_name=>"$basedir$t->{'name'}",
4784                                              %base_key)},
4785                               esc_path($t->{'name'}));
4786                 print "</td>\n";
4787                 print "<td class=\"link\">";
4788                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4789                                              file_name=>"$basedir$t->{'name'}",
4790                                              %base_key)},
4791                               "tree");
4792                 if (defined $hash_base) {
4793                         print " | " .
4794                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4795                                                      file_name=>"$basedir$t->{'name'}")},
4796                                       "history");
4797                 }
4798                 print "</td>\n";
4799         } else {
4800                 # unknown object: we can only present history for it
4801                 # (this includes 'commit' object, i.e. submodule support)
4802                 print "<td class=\"list\">" .
4803                       esc_path($t->{'name'}) .
4804                       "</td>\n";
4805                 print "<td class=\"link\">";
4806                 if (defined $hash_base) {
4807                         print $cgi->a({-href => href(action=>"history",
4808                                                      hash_base=>$hash_base,
4809                                                      file_name=>"$basedir$t->{'name'}")},
4810                                       "history");
4811                 }
4812                 print "</td>\n";
4813         }
4814 }
4815
4816 ## ......................................................................
4817 ## functions printing large fragments of HTML
4818
4819 # get pre-image filenames for merge (combined) diff
4820 sub fill_from_file_info {
4821         my ($diff, @parents) = @_;
4822
4823         $diff->{'from_file'} = [ ];
4824         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4825         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4826                 if ($diff->{'status'}[$i] eq 'R' ||
4827                     $diff->{'status'}[$i] eq 'C') {
4828                         $diff->{'from_file'}[$i] =
4829                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4830                 }
4831         }
4832
4833         return $diff;
4834 }
4835
4836 # is current raw difftree line of file deletion
4837 sub is_deleted {
4838         my $diffinfo = shift;
4839
4840         return $diffinfo->{'to_id'} eq ('0' x 40) || $diffinfo->{'to_id'} eq ('0' x 64);
4841 }
4842
4843 # does patch correspond to [previous] difftree raw line
4844 # $diffinfo  - hashref of parsed raw diff format
4845 # $patchinfo - hashref of parsed patch diff format
4846 #              (the same keys as in $diffinfo)
4847 sub is_patch_split {
4848         my ($diffinfo, $patchinfo) = @_;
4849
4850         return defined $diffinfo && defined $patchinfo
4851                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4852 }
4853
4854
4855 sub git_difftree_body {
4856         my ($difftree, $hash, @parents) = @_;
4857         my ($parent) = $parents[0];
4858         my $have_blame = gitweb_check_feature('blame');
4859         print "<div class=\"list_head\">\n";
4860         if ($#{$difftree} > 10) {
4861                 print(($#{$difftree} + 1) . " files changed:\n");
4862         }
4863         print "</div>\n";
4864
4865         print "<table class=\"" .
4866               (@parents > 1 ? "combined " : "") .
4867               "diff_tree\">\n";
4868
4869         # header only for combined diff in 'commitdiff' view
4870         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4871         if ($has_header) {
4872                 # table header
4873                 print "<thead><tr>\n" .
4874                        "<th></th><th></th>\n"; # filename, patchN link
4875                 for (my $i = 0; $i < @parents; $i++) {
4876                         my $par = $parents[$i];
4877                         print "<th>" .
4878                               $cgi->a({-href => href(action=>"commitdiff",
4879                                                      hash=>$hash, hash_parent=>$par),
4880                                        -title => 'commitdiff to parent number ' .
4881                                                   ($i+1) . ': ' . substr($par,0,7)},
4882                                       $i+1) .
4883                               "&nbsp;</th>\n";
4884                 }
4885                 print "</tr></thead>\n<tbody>\n";
4886         }
4887
4888         my $alternate = 1;
4889         my $patchno = 0;
4890         foreach my $line (@{$difftree}) {
4891                 my $diff = parsed_difftree_line($line);
4892
4893                 if ($alternate) {
4894                         print "<tr class=\"dark\">\n";
4895                 } else {
4896                         print "<tr class=\"light\">\n";
4897                 }
4898                 $alternate ^= 1;
4899
4900                 if (exists $diff->{'nparents'}) { # combined diff
4901
4902                         fill_from_file_info($diff, @parents)
4903                                 unless exists $diff->{'from_file'};
4904
4905                         if (!is_deleted($diff)) {
4906                                 # file exists in the result (child) commit
4907                                 print "<td>" .
4908                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4909                                                              file_name=>$diff->{'to_file'},
4910                                                              hash_base=>$hash),
4911                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4912                                       "</td>\n";
4913                         } else {
4914                                 print "<td>" .
4915                                       esc_path($diff->{'to_file'}) .
4916                                       "</td>\n";
4917                         }
4918
4919                         if ($action eq 'commitdiff') {
4920                                 # link to patch
4921                                 $patchno++;
4922                                 print "<td class=\"link\">" .
4923                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4924                                               "patch") .
4925                                       " | " .
4926                                       "</td>\n";
4927                         }
4928
4929                         my $has_history = 0;
4930                         my $not_deleted = 0;
4931                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4932                                 my $hash_parent = $parents[$i];
4933                                 my $from_hash = $diff->{'from_id'}[$i];
4934                                 my $from_path = $diff->{'from_file'}[$i];
4935                                 my $status = $diff->{'status'}[$i];
4936
4937                                 $has_history ||= ($status ne 'A');
4938                                 $not_deleted ||= ($status ne 'D');
4939
4940                                 if ($status eq 'A') {
4941                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4942                                 } elsif ($status eq 'D') {
4943                                         print "<td class=\"link\">" .
4944                                               $cgi->a({-href => href(action=>"blob",
4945                                                                      hash_base=>$hash,
4946                                                                      hash=>$from_hash,
4947                                                                      file_name=>$from_path)},
4948                                                       "blob" . ($i+1)) .
4949                                               " | </td>\n";
4950                                 } else {
4951                                         if ($diff->{'to_id'} eq $from_hash) {
4952                                                 print "<td class=\"link nochange\">";
4953                                         } else {
4954                                                 print "<td class=\"link\">";
4955                                         }
4956                                         print $cgi->a({-href => href(action=>"blobdiff",
4957                                                                      hash=>$diff->{'to_id'},
4958                                                                      hash_parent=>$from_hash,
4959                                                                      hash_base=>$hash,
4960                                                                      hash_parent_base=>$hash_parent,
4961                                                                      file_name=>$diff->{'to_file'},
4962                                                                      file_parent=>$from_path)},
4963                                                       "diff" . ($i+1)) .
4964                                               " | </td>\n";
4965                                 }
4966                         }
4967
4968                         print "<td class=\"link\">";
4969                         if ($not_deleted) {
4970                                 print $cgi->a({-href => href(action=>"blob",
4971                                                              hash=>$diff->{'to_id'},
4972                                                              file_name=>$diff->{'to_file'},
4973                                                              hash_base=>$hash)},
4974                                               "blob");
4975                                 print " | " if ($has_history);
4976                         }
4977                         if ($has_history) {
4978                                 print $cgi->a({-href => href(action=>"history",
4979                                                              file_name=>$diff->{'to_file'},
4980                                                              hash_base=>$hash)},
4981                                               "history");
4982                         }
4983                         print "</td>\n";
4984
4985                         print "</tr>\n";
4986                         next; # instead of 'else' clause, to avoid extra indent
4987                 }
4988                 # else ordinary diff
4989
4990                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4991                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4992                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4993                         $to_mode_oct = oct $diff->{'to_mode'};
4994                         if (S_ISREG($to_mode_oct)) { # only for regular file
4995                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4996                         }
4997                         $to_file_type = file_type($diff->{'to_mode'});
4998                 }
4999                 if ($diff->{'from_mode'} ne ('0' x 6)) {
5000                         $from_mode_oct = oct $diff->{'from_mode'};
5001                         if (S_ISREG($from_mode_oct)) { # only for regular file
5002                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
5003                         }
5004                         $from_file_type = file_type($diff->{'from_mode'});
5005                 }
5006
5007                 if ($diff->{'status'} eq "A") { # created
5008                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
5009                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
5010                         $mode_chng   .= "]</span>";
5011                         print "<td>";
5012                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5013                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
5014                                       -class => "list"}, esc_path($diff->{'file'}));
5015                         print "</td>\n";
5016                         print "<td>$mode_chng</td>\n";
5017                         print "<td class=\"link\">";
5018                         if ($action eq 'commitdiff') {
5019                                 # link to patch
5020                                 $patchno++;
5021                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5022                                               "patch") .
5023                                       " | ";
5024                         }
5025                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5026                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
5027                                       "blob");
5028                         print "</td>\n";
5029
5030                 } elsif ($diff->{'status'} eq "D") { # deleted
5031                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
5032                         print "<td>";
5033                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
5034                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
5035                                        -class => "list"}, esc_path($diff->{'file'}));
5036                         print "</td>\n";
5037                         print "<td>$mode_chng</td>\n";
5038                         print "<td class=\"link\">";
5039                         if ($action eq 'commitdiff') {
5040                                 # link to patch
5041                                 $patchno++;
5042                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5043                                               "patch") .
5044                                       " | ";
5045                         }
5046                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
5047                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
5048                                       "blob") . " | ";
5049                         if ($have_blame) {
5050                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
5051                                                              file_name=>$diff->{'file'})},
5052                                               "blame") . " | ";
5053                         }
5054                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
5055                                                      file_name=>$diff->{'file'})},
5056                                       "history");
5057                         print "</td>\n";
5058
5059                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
5060                         my $mode_chnge = "";
5061                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5062                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
5063                                 if ($from_file_type ne $to_file_type) {
5064                                         $mode_chnge .= " from $from_file_type to $to_file_type";
5065                                 }
5066                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
5067                                         if ($from_mode_str && $to_mode_str) {
5068                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
5069                                         } elsif ($to_mode_str) {
5070                                                 $mode_chnge .= " mode: $to_mode_str";
5071                                         }
5072                                 }
5073                                 $mode_chnge .= "]</span>\n";
5074                         }
5075                         print "<td>";
5076                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5077                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
5078                                       -class => "list"}, esc_path($diff->{'file'}));
5079                         print "</td>\n";
5080                         print "<td>$mode_chnge</td>\n";
5081                         print "<td class=\"link\">";
5082                         if ($action eq 'commitdiff') {
5083                                 # link to patch
5084                                 $patchno++;
5085                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5086                                               "patch") .
5087                                       " | ";
5088                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5089                                 # "commit" view and modified file (not onlu mode changed)
5090                                 print $cgi->a({-href => href(action=>"blobdiff",
5091                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5092                                                              hash_base=>$hash, hash_parent_base=>$parent,
5093                                                              file_name=>$diff->{'file'})},
5094                                               "diff") .
5095                                       " | ";
5096                         }
5097                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5098                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
5099                                        "blob") . " | ";
5100                         if ($have_blame) {
5101                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5102                                                              file_name=>$diff->{'file'})},
5103                                               "blame") . " | ";
5104                         }
5105                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5106                                                      file_name=>$diff->{'file'})},
5107                                       "history");
5108                         print "</td>\n";
5109
5110                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
5111                         my %status_name = ('R' => 'moved', 'C' => 'copied');
5112                         my $nstatus = $status_name{$diff->{'status'}};
5113                         my $mode_chng = "";
5114                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5115                                 # mode also for directories, so we cannot use $to_mode_str
5116                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
5117                         }
5118                         print "<td>" .
5119                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
5120                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
5121                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
5122                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
5123                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
5124                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
5125                                       -class => "list"}, esc_path($diff->{'from_file'})) .
5126                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
5127                               "<td class=\"link\">";
5128                         if ($action eq 'commitdiff') {
5129                                 # link to patch
5130                                 $patchno++;
5131                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5132                                               "patch") .
5133                                       " | ";
5134                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5135                                 # "commit" view and modified file (not only pure rename or copy)
5136                                 print $cgi->a({-href => href(action=>"blobdiff",
5137                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5138                                                              hash_base=>$hash, hash_parent_base=>$parent,
5139                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
5140                                               "diff") .
5141                                       " | ";
5142                         }
5143                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5144                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
5145                                       "blob") . " | ";
5146                         if ($have_blame) {
5147                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5148                                                              file_name=>$diff->{'to_file'})},
5149                                               "blame") . " | ";
5150                         }
5151                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5152                                                     file_name=>$diff->{'to_file'})},
5153                                       "history");
5154                         print "</td>\n";
5155
5156                 } # we should not encounter Unmerged (U) or Unknown (X) status
5157                 print "</tr>\n";
5158         }
5159         print "</tbody>" if $has_header;
5160         print "</table>\n";
5161 }
5162
5163 # Print context lines and then rem/add lines in a side-by-side manner.
5164 sub print_sidebyside_diff_lines {
5165         my ($ctx, $rem, $add) = @_;
5166
5167         # print context block before add/rem block
5168         if (@$ctx) {
5169                 print join '',
5170                         '<div class="chunk_block ctx">',
5171                                 '<div class="old">',
5172                                 @$ctx,
5173                                 '</div>',
5174                                 '<div class="new">',
5175                                 @$ctx,
5176                                 '</div>',
5177                         '</div>';
5178         }
5179
5180         if (!@$add) {
5181                 # pure removal
5182                 print join '',
5183                         '<div class="chunk_block rem">',
5184                                 '<div class="old">',
5185                                 @$rem,
5186                                 '</div>',
5187                         '</div>';
5188         } elsif (!@$rem) {
5189                 # pure addition
5190                 print join '',
5191                         '<div class="chunk_block add">',
5192                                 '<div class="new">',
5193                                 @$add,
5194                                 '</div>',
5195                         '</div>';
5196         } else {
5197                 print join '',
5198                         '<div class="chunk_block chg">',
5199                                 '<div class="old">',
5200                                 @$rem,
5201                                 '</div>',
5202                                 '<div class="new">',
5203                                 @$add,
5204                                 '</div>',
5205                         '</div>';
5206         }
5207 }
5208
5209 # Print context lines and then rem/add lines in inline manner.
5210 sub print_inline_diff_lines {
5211         my ($ctx, $rem, $add) = @_;
5212
5213         print @$ctx, @$rem, @$add;
5214 }
5215
5216 # Format removed and added line, mark changed part and HTML-format them.
5217 # Implementation is based on contrib/diff-highlight
5218 sub format_rem_add_lines_pair {
5219         my ($rem, $add, $num_parents) = @_;
5220
5221         # We need to untabify lines before split()'ing them;
5222         # otherwise offsets would be invalid.
5223         chomp $rem;
5224         chomp $add;
5225         $rem = untabify($rem);
5226         $add = untabify($add);
5227
5228         my @rem = split(//, $rem);
5229         my @add = split(//, $add);
5230         my ($esc_rem, $esc_add);
5231         # Ignore leading +/- characters for each parent.
5232         my ($prefix_len, $suffix_len) = ($num_parents, 0);
5233         my ($prefix_has_nonspace, $suffix_has_nonspace);
5234
5235         my $shorter = (@rem < @add) ? @rem : @add;
5236         while ($prefix_len < $shorter) {
5237                 last if ($rem[$prefix_len] ne $add[$prefix_len]);
5238
5239                 $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5240                 $prefix_len++;
5241         }
5242
5243         while ($prefix_len + $suffix_len < $shorter) {
5244                 last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5245
5246                 $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5247                 $suffix_len++;
5248         }
5249
5250         # Mark lines that are different from each other, but have some common
5251         # part that isn't whitespace.  If lines are completely different, don't
5252         # mark them because that would make output unreadable, especially if
5253         # diff consists of multiple lines.
5254         if ($prefix_has_nonspace || $suffix_has_nonspace) {
5255                 $esc_rem = esc_html_hl_regions($rem, 'marked',
5256                         [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5257                 $esc_add = esc_html_hl_regions($add, 'marked',
5258                         [$prefix_len, @add - $suffix_len], -nbsp=>1);
5259         } else {
5260                 $esc_rem = esc_html($rem, -nbsp=>1);
5261                 $esc_add = esc_html($add, -nbsp=>1);
5262         }
5263
5264         return format_diff_line(\$esc_rem, 'rem'),
5265                format_diff_line(\$esc_add, 'add');
5266 }
5267
5268 # HTML-format diff context, removed and added lines.
5269 sub format_ctx_rem_add_lines {
5270         my ($ctx, $rem, $add, $num_parents) = @_;
5271         my (@new_ctx, @new_rem, @new_add);
5272         my $can_highlight = 0;
5273         my $is_combined = ($num_parents > 1);
5274
5275         # Highlight if every removed line has a corresponding added line.
5276         if (@$add > 0 && @$add == @$rem) {
5277                 $can_highlight = 1;
5278
5279                 # Highlight lines in combined diff only if the chunk contains
5280                 # diff between the same version, e.g.
5281                 #
5282                 #    - a
5283                 #   -  b
5284                 #    + c
5285                 #   +  d
5286                 #
5287                 # Otherwise the highlightling would be confusing.
5288                 if ($is_combined) {
5289                         for (my $i = 0; $i < @$add; $i++) {
5290                                 my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5291                                 my $prefix_add = substr($add->[$i], 0, $num_parents);
5292
5293                                 $prefix_rem =~ s/-/+/g;
5294
5295                                 if ($prefix_rem ne $prefix_add) {
5296                                         $can_highlight = 0;
5297                                         last;
5298                                 }
5299                         }
5300                 }
5301         }
5302
5303         if ($can_highlight) {
5304                 for (my $i = 0; $i < @$add; $i++) {
5305                         my ($line_rem, $line_add) = format_rem_add_lines_pair(
5306                                 $rem->[$i], $add->[$i], $num_parents);
5307                         push @new_rem, $line_rem;
5308                         push @new_add, $line_add;
5309                 }
5310         } else {
5311                 @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5312                 @new_add = map { format_diff_line($_, 'add') } @$add;
5313         }
5314
5315         @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5316
5317         return (\@new_ctx, \@new_rem, \@new_add);
5318 }
5319
5320 # Print context lines and then rem/add lines.
5321 sub print_diff_lines {
5322         my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5323         my $is_combined = $num_parents > 1;
5324
5325         ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5326                 $num_parents);
5327
5328         if ($diff_style eq 'sidebyside' && !$is_combined) {
5329                 print_sidebyside_diff_lines($ctx, $rem, $add);
5330         } else {
5331                 # default 'inline' style and unknown styles
5332                 print_inline_diff_lines($ctx, $rem, $add);
5333         }
5334 }
5335
5336 sub print_diff_chunk {
5337         my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5338         my (@ctx, @rem, @add);
5339
5340         # The class of the previous line.
5341         my $prev_class = '';
5342
5343         return unless @chunk;
5344
5345         # incomplete last line might be among removed or added lines,
5346         # or both, or among context lines: find which
5347         for (my $i = 1; $i < @chunk; $i++) {
5348                 if ($chunk[$i][0] eq 'incomplete') {
5349                         $chunk[$i][0] = $chunk[$i-1][0];
5350                 }
5351         }
5352
5353         # guardian
5354         push @chunk, ["", ""];
5355
5356         foreach my $line_info (@chunk) {
5357                 my ($class, $line) = @$line_info;
5358
5359                 # print chunk headers
5360                 if ($class && $class eq 'chunk_header') {
5361                         print format_diff_line($line, $class, $from, $to);
5362                         next;
5363                 }
5364
5365                 ## print from accumulator when have some add/rem lines or end
5366                 # of chunk (flush context lines), or when have add and rem
5367                 # lines and new block is reached (otherwise add/rem lines could
5368                 # be reordered)
5369                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5370                     (@rem && @add && $class ne $prev_class)) {
5371                         print_diff_lines(\@ctx, \@rem, \@add,
5372                                          $diff_style, $num_parents);
5373                         @ctx = @rem = @add = ();
5374                 }
5375
5376                 ## adding lines to accumulator
5377                 # guardian value
5378                 last unless $line;
5379                 # rem, add or change
5380                 if ($class eq 'rem') {
5381                         push @rem, $line;
5382                 } elsif ($class eq 'add') {
5383                         push @add, $line;
5384                 }
5385                 # context line
5386                 if ($class eq 'ctx') {
5387                         push @ctx, $line;
5388                 }
5389
5390                 $prev_class = $class;
5391         }
5392 }
5393
5394 sub git_patchset_body {
5395         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5396         my ($hash_parent) = $hash_parents[0];
5397
5398         my $is_combined = (@hash_parents > 1);
5399         my $patch_idx = 0;
5400         my $patch_number = 0;
5401         my $patch_line;
5402         my $diffinfo;
5403         my $to_name;
5404         my (%from, %to);
5405         my @chunk; # for side-by-side diff
5406
5407         print "<div class=\"patchset\">\n";
5408
5409         # skip to first patch
5410         while ($patch_line = <$fd>) {
5411                 chomp $patch_line;
5412
5413                 last if ($patch_line =~ m/^diff /);
5414         }
5415
5416  PATCH:
5417         while ($patch_line) {
5418
5419                 # parse "git diff" header line
5420                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5421                         # $1 is from_name, which we do not use
5422                         $to_name = unquote($2);
5423                         $to_name =~ s!^b/!!;
5424                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5425                         # $1 is 'cc' or 'combined', which we do not use
5426                         $to_name = unquote($2);
5427                 } else {
5428                         $to_name = undef;
5429                 }
5430
5431                 # check if current patch belong to current raw line
5432                 # and parse raw git-diff line if needed
5433                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5434                         # this is continuation of a split patch
5435                         print "<div class=\"patch cont\">\n";
5436                 } else {
5437                         # advance raw git-diff output if needed
5438                         $patch_idx++ if defined $diffinfo;
5439
5440                         # read and prepare patch information
5441                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5442
5443                         # compact combined diff output can have some patches skipped
5444                         # find which patch (using pathname of result) we are at now;
5445                         if ($is_combined) {
5446                                 while ($to_name ne $diffinfo->{'to_file'}) {
5447                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5448                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5449                                               "</div>\n";  # class="patch"
5450
5451                                         $patch_idx++;
5452                                         $patch_number++;
5453
5454                                         last if $patch_idx > $#$difftree;
5455                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5456                                 }
5457                         }
5458
5459                         # modifies %from, %to hashes
5460                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5461
5462                         # this is first patch for raw difftree line with $patch_idx index
5463                         # we index @$difftree array from 0, but number patches from 1
5464                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5465                 }
5466
5467                 # git diff header
5468                 #assert($patch_line =~ m/^diff /) if DEBUG;
5469                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5470                 $patch_number++;
5471                 # print "git diff" header
5472                 print format_git_diff_header_line($patch_line, $diffinfo,
5473                                                   \%from, \%to);
5474
5475                 # print extended diff header
5476                 print "<div class=\"diff extended_header\">\n";
5477         EXTENDED_HEADER:
5478                 while ($patch_line = <$fd>) {
5479                         chomp $patch_line;
5480
5481                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5482
5483                         print format_extended_diff_header_line($patch_line, $diffinfo,
5484                                                                \%from, \%to);
5485                 }
5486                 print "</div>\n"; # class="diff extended_header"
5487
5488                 # from-file/to-file diff header
5489                 if (! $patch_line) {
5490                         print "</div>\n"; # class="patch"
5491                         last PATCH;
5492                 }
5493                 next PATCH if ($patch_line =~ m/^diff /);
5494                 #assert($patch_line =~ m/^---/) if DEBUG;
5495
5496                 my $last_patch_line = $patch_line;
5497                 $patch_line = <$fd>;
5498                 chomp $patch_line;
5499                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5500
5501                 print format_diff_from_to_header($last_patch_line, $patch_line,
5502                                                  $diffinfo, \%from, \%to,
5503                                                  @hash_parents);
5504
5505                 # the patch itself
5506         LINE:
5507                 while ($patch_line = <$fd>) {
5508                         chomp $patch_line;
5509
5510                         next PATCH if ($patch_line =~ m/^diff /);
5511
5512                         my $class = diff_line_class($patch_line, \%from, \%to);
5513
5514                         if ($class eq 'chunk_header') {
5515                                 print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5516                                 @chunk = ();
5517                         }
5518
5519                         push @chunk, [ $class, $patch_line ];
5520                 }
5521
5522         } continue {
5523                 if (@chunk) {
5524                         print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5525                         @chunk = ();
5526                 }
5527                 print "</div>\n"; # class="patch"
5528         }
5529
5530         # for compact combined (--cc) format, with chunk and patch simplification
5531         # the patchset might be empty, but there might be unprocessed raw lines
5532         for (++$patch_idx if $patch_number > 0;
5533              $patch_idx < @$difftree;
5534              ++$patch_idx) {
5535                 # read and prepare patch information
5536                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5537
5538                 # generate anchor for "patch" links in difftree / whatchanged part
5539                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5540                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5541                       "</div>\n";  # class="patch"
5542
5543                 $patch_number++;
5544         }
5545
5546         if ($patch_number == 0) {
5547                 if (@hash_parents > 1) {
5548                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5549                 } else {
5550                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5551                 }
5552         }
5553
5554         print "</div>\n"; # class="patchset"
5555 }
5556
5557 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5558
5559 sub git_project_search_form {
5560         my ($searchtext, $search_use_regexp) = @_;
5561
5562         my $limit = '';
5563         if ($project_filter) {
5564                 $limit = " in '$project_filter/'";
5565         }
5566
5567         print "<div class=\"projsearch\">\n";
5568         print $cgi->start_form(-method => 'get', -action => $my_uri) .
5569               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5570         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5571                 if (defined $project_filter);
5572         print $cgi->textfield(-name => 's', -value => $searchtext,
5573                               -title => "Search project by name and description$limit",
5574                               -size => 60) . "\n" .
5575               "<span title=\"Extended regular expression\">" .
5576               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5577                              -checked => $search_use_regexp) .
5578               "</span>\n" .
5579               $cgi->submit(-name => 'btnS', -value => 'Search') .
5580               $cgi->end_form() . "\n" .
5581               $cgi->a({-href => href(project => undef, searchtext => undef,
5582                                      project_filter => $project_filter)},
5583                       esc_html("List all projects$limit")) . "<br />\n";
5584         print "</div>\n";
5585 }
5586
5587 # entry for given @keys needs filling if at least one of keys in list
5588 # is not present in %$project_info
5589 sub project_info_needs_filling {
5590         my ($project_info, @keys) = @_;
5591
5592         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5593         foreach my $key (@keys) {
5594                 if (!exists $project_info->{$key}) {
5595                         return 1;
5596                 }
5597         }
5598         return;
5599 }
5600
5601 # fills project list info (age, description, owner, category, forks, etc.)
5602 # for each project in the list, removing invalid projects from
5603 # returned list, or fill only specified info.
5604 #
5605 # Invalid projects are removed from the returned list if and only if you
5606 # ask 'age' or 'age_string' to be filled, because they are the only fields
5607 # that run unconditionally git command that requires repository, and
5608 # therefore do always check if project repository is invalid.
5609 #
5610 # USAGE:
5611 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5612 #   ensures that 'descr_long' and 'ctags' fields are filled
5613 # * @project_list = fill_project_list_info(\@project_list)
5614 #   ensures that all fields are filled (and invalid projects removed)
5615 #
5616 # NOTE: modifies $projlist, but does not remove entries from it
5617 sub fill_project_list_info {
5618         my ($projlist, @wanted_keys) = @_;
5619         my @projects;
5620         my $filter_set = sub { return @_; };
5621         if (@wanted_keys) {
5622                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5623                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5624         }
5625
5626         my $show_ctags = gitweb_check_feature('ctags');
5627  PROJECT:
5628         foreach my $pr (@$projlist) {
5629                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5630                         my (@activity) = git_get_last_activity($pr->{'path'});
5631                         unless (@activity) {
5632                                 next PROJECT;
5633                         }
5634                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5635                 }
5636                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5637                         my $descr = git_get_project_description($pr->{'path'}) || "";
5638                         $descr = to_utf8($descr);
5639                         $pr->{'descr_long'} = $descr;
5640                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5641                 }
5642                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5643                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5644                 }
5645                 if ($show_ctags &&
5646                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5647                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5648                 }
5649                 if ($projects_list_group_categories &&
5650                     project_info_needs_filling($pr, $filter_set->('category'))) {
5651                         my $cat = git_get_project_category($pr->{'path'}) ||
5652                                                            $project_list_default_category;
5653                         $pr->{'category'} = to_utf8($cat);
5654                 }
5655
5656                 push @projects, $pr;
5657         }
5658
5659         return @projects;
5660 }
5661
5662 sub sort_projects_list {
5663         my ($projlist, $order) = @_;
5664
5665         sub order_str {
5666                 my $key = shift;
5667                 return sub { $a->{$key} cmp $b->{$key} };
5668         }
5669
5670         sub order_num_then_undef {
5671                 my $key = shift;
5672                 return sub {
5673                         defined $a->{$key} ?
5674                                 (defined $b->{$key} ? $a->{$key} <=> $b->{$key} : -1) :
5675                                 (defined $b->{$key} ? 1 : 0)
5676                 };
5677         }
5678
5679         my %orderings = (
5680                 project => order_str('path'),
5681                 descr => order_str('descr_long'),
5682                 owner => order_str('owner'),
5683                 age => order_num_then_undef('age'),
5684         );
5685
5686         my $ordering = $orderings{$order};
5687         return defined $ordering ? sort $ordering @$projlist : @$projlist;
5688 }
5689
5690 # returns a hash of categories, containing the list of project
5691 # belonging to each category
5692 sub build_projlist_by_category {
5693         my ($projlist, $from, $to) = @_;
5694         my %categories;
5695
5696         $from = 0 unless defined $from;
5697         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5698
5699         for (my $i = $from; $i <= $to; $i++) {
5700                 my $pr = $projlist->[$i];
5701                 push @{$categories{ $pr->{'category'} }}, $pr;
5702         }
5703
5704         return wantarray ? %categories : \%categories;
5705 }
5706
5707 # print 'sort by' <th> element, generating 'sort by $name' replay link
5708 # if that order is not selected
5709 sub print_sort_th {
5710         print format_sort_th(@_);
5711 }
5712
5713 sub format_sort_th {
5714         my ($name, $order, $header) = @_;
5715         my $sort_th = "";
5716         $header ||= ucfirst($name);
5717
5718         if ($order eq $name) {
5719                 $sort_th .= "<th>$header</th>\n";
5720         } else {
5721                 $sort_th .= "<th>" .
5722                             $cgi->a({-href => href(-replay=>1, order=>$name),
5723                                      -class => "header"}, $header) .
5724                             "</th>\n";
5725         }
5726
5727         return $sort_th;
5728 }
5729
5730 sub git_project_list_rows {
5731         my ($projlist, $from, $to, $check_forks) = @_;
5732
5733         $from = 0 unless defined $from;
5734         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5735
5736         my $alternate = 1;
5737         for (my $i = $from; $i <= $to; $i++) {
5738                 my $pr = $projlist->[$i];
5739
5740                 if ($alternate) {
5741                         print "<tr class=\"dark\">\n";
5742                 } else {
5743                         print "<tr class=\"light\">\n";
5744                 }
5745                 $alternate ^= 1;
5746
5747                 if ($check_forks) {
5748                         print "<td>";
5749                         if ($pr->{'forks'}) {
5750                                 my $nforks = scalar @{$pr->{'forks'}};
5751                                 if ($nforks > 0) {
5752                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5753                                                        -title => "$nforks forks"}, "+");
5754                                 } else {
5755                                         print $cgi->span({-title => "$nforks forks"}, "+");
5756                                 }
5757                         }
5758                         print "</td>\n";
5759                 }
5760                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5761                                         -class => "list"},
5762                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5763                       "</td>\n" .
5764                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5765                                         -class => "list",
5766                                         -title => $pr->{'descr_long'}},
5767                                         $search_regexp
5768                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5769                                                                     $pr->{'descr'}, $search_regexp)
5770                                         : esc_html($pr->{'descr'})) .
5771                       "</td>\n";
5772                 unless ($omit_owner) {
5773                         print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5774                 }
5775                 unless ($omit_age_column) {
5776                         print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5777                             (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5778                 }
5779                 print"<td class=\"link\">" .
5780                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5781                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5782                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5783                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5784                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5785                       "</td>\n" .
5786                       "</tr>\n";
5787         }
5788 }
5789
5790 sub git_project_list_body {
5791         # actually uses global variable $project
5792         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5793         my @projects = @$projlist;
5794
5795         my $check_forks = gitweb_check_feature('forks');
5796         my $show_ctags  = gitweb_check_feature('ctags');
5797         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5798         $check_forks = undef
5799                 if ($tagfilter || $search_regexp);
5800
5801         # filtering out forks before filling info allows to do less work
5802         @projects = filter_forks_from_projects_list(\@projects)
5803                 if ($check_forks);
5804         # search_projects_list pre-fills required info
5805         @projects = search_projects_list(\@projects,
5806                                          'search_regexp' => $search_regexp,
5807                                          'tagfilter'  => $tagfilter)
5808                 if ($tagfilter || $search_regexp);
5809         # fill the rest
5810         my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5811         push @all_fields, ('age', 'age_string') unless($omit_age_column);
5812         push @all_fields, 'owner' unless($omit_owner);
5813         @projects = fill_project_list_info(\@projects, @all_fields);
5814
5815         $order ||= $default_projects_order;
5816         $from = 0 unless defined $from;
5817         $to = $#projects if (!defined $to || $#projects < $to);
5818
5819         # short circuit
5820         if ($from > $to) {
5821                 print "<center>\n".
5822                       "<b>No such projects found</b><br />\n".
5823                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5824                       "</center>\n<br />\n";
5825                 return;
5826         }
5827
5828         @projects = sort_projects_list(\@projects, $order);
5829
5830         if ($show_ctags) {
5831                 my $ctags = git_gather_all_ctags(\@projects);
5832                 my $cloud = git_populate_project_tagcloud($ctags);
5833                 print git_show_project_tagcloud($cloud, 64);
5834         }
5835
5836         print "<table class=\"project_list\">\n";
5837         unless ($no_header) {
5838                 print "<tr>\n";
5839                 if ($check_forks) {
5840                         print "<th></th>\n";
5841                 }
5842                 print_sort_th('project', $order, 'Project');
5843                 print_sort_th('descr', $order, 'Description');
5844                 print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5845                 print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5846                 print "<th></th>\n" . # for links
5847                       "</tr>\n";
5848         }
5849
5850         if ($projects_list_group_categories) {
5851                 # only display categories with projects in the $from-$to window
5852                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5853                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5854                 foreach my $cat (sort keys %categories) {
5855                         unless ($cat eq "") {
5856                                 print "<tr>\n";
5857                                 if ($check_forks) {
5858                                         print "<td></td>\n";
5859                                 }
5860                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5861                                 print "</tr>\n";
5862                         }
5863
5864                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5865                 }
5866         } else {
5867                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5868         }
5869
5870         if (defined $extra) {
5871                 print "<tr>\n";
5872                 if ($check_forks) {
5873                         print "<td></td>\n";
5874                 }
5875                 print "<td colspan=\"5\">$extra</td>\n" .
5876                       "</tr>\n";
5877         }
5878         print "</table>\n";
5879 }
5880
5881 sub git_log_body {
5882         # uses global variable $project
5883         my ($commitlist, $from, $to, $refs, $extra) = @_;
5884
5885         $from = 0 unless defined $from;
5886         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5887
5888         for (my $i = 0; $i <= $to; $i++) {
5889                 my %co = %{$commitlist->[$i]};
5890                 next if !%co;
5891                 my $commit = $co{'id'};
5892                 my $ref = format_ref_marker($refs, $commit);
5893                 git_print_header_div('commit',
5894                                "<span class=\"age\">$co{'age_string'}</span>" .
5895                                esc_html($co{'title'}) . $ref,
5896                                $commit);
5897                 print "<div class=\"title_text\">\n" .
5898                       "<div class=\"log_link\">\n" .
5899                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5900                       " | " .
5901                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5902                       " | " .
5903                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5904                       "<br/>\n" .
5905                       "</div>\n";
5906                       git_print_authorship(\%co, -tag => 'span');
5907                       print "<br/>\n</div>\n";
5908
5909                 print "<div class=\"log_body\">\n";
5910                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5911                 print "</div>\n";
5912         }
5913         if ($extra) {
5914                 print "<div class=\"page_nav\">\n";
5915                 print "$extra\n";
5916                 print "</div>\n";
5917         }
5918 }
5919
5920 sub git_shortlog_body {
5921         # uses global variable $project
5922         my ($commitlist, $from, $to, $refs, $extra) = @_;
5923
5924         $from = 0 unless defined $from;
5925         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5926
5927         print "<table class=\"shortlog\">\n";
5928         my $alternate = 1;
5929         for (my $i = $from; $i <= $to; $i++) {
5930                 my %co = %{$commitlist->[$i]};
5931                 my $commit = $co{'id'};
5932                 my $ref = format_ref_marker($refs, $commit);
5933                 if ($alternate) {
5934                         print "<tr class=\"dark\">\n";
5935                 } else {
5936                         print "<tr class=\"light\">\n";
5937                 }
5938                 $alternate ^= 1;
5939                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5940                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5941                       format_author_html('td', \%co, 10) . "<td>";
5942                 print format_subject_html($co{'title'}, $co{'title_short'},
5943                                           href(action=>"commit", hash=>$commit), $ref);
5944                 print "</td>\n" .
5945                       "<td class=\"link\">" .
5946                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5947                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5948                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5949                 my $snapshot_links = format_snapshot_links($commit);
5950                 if (defined $snapshot_links) {
5951                         print " | " . $snapshot_links;
5952                 }
5953                 print "</td>\n" .
5954                       "</tr>\n";
5955         }
5956         if (defined $extra) {
5957                 print "<tr>\n" .
5958                       "<td colspan=\"4\">$extra</td>\n" .
5959                       "</tr>\n";
5960         }
5961         print "</table>\n";
5962 }
5963
5964 sub git_history_body {
5965         # Warning: assumes constant type (blob or tree) during history
5966         my ($commitlist, $from, $to, $refs, $extra,
5967             $file_name, $file_hash, $ftype) = @_;
5968
5969         $from = 0 unless defined $from;
5970         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5971
5972         print "<table class=\"history\">\n";
5973         my $alternate = 1;
5974         for (my $i = $from; $i <= $to; $i++) {
5975                 my %co = %{$commitlist->[$i]};
5976                 if (!%co) {
5977                         next;
5978                 }
5979                 my $commit = $co{'id'};
5980
5981                 my $ref = format_ref_marker($refs, $commit);
5982
5983                 if ($alternate) {
5984                         print "<tr class=\"dark\">\n";
5985                 } else {
5986                         print "<tr class=\"light\">\n";
5987                 }
5988                 $alternate ^= 1;
5989                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5990         # shortlog:   format_author_html('td', \%co, 10)
5991                       format_author_html('td', \%co, 15, 3) . "<td>";
5992                 # originally git_history used chop_str($co{'title'}, 50)
5993                 print format_subject_html($co{'title'}, $co{'title_short'},
5994                                           href(action=>"commit", hash=>$commit), $ref);
5995                 print "</td>\n" .
5996                       "<td class=\"link\">" .
5997                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5998                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5999
6000                 if ($ftype eq 'blob') {
6001                         print " | " .
6002                               $cgi->a({-href => href(action=>"blob_plain", hash_base=>$commit, file_name=>$file_name)}, "raw");
6003
6004                         my $blob_current = $file_hash;
6005                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
6006                         if (defined $blob_current && defined $blob_parent &&
6007                                         $blob_current ne $blob_parent) {
6008                                 print " | " .
6009                                         $cgi->a({-href => href(action=>"blobdiff",
6010                                                                hash=>$blob_current, hash_parent=>$blob_parent,
6011                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
6012                                                                file_name=>$file_name)},
6013                                                 "diff to current");
6014                         }
6015                 }
6016                 print "</td>\n" .
6017                       "</tr>\n";
6018         }
6019         if (defined $extra) {
6020                 print "<tr>\n" .
6021                       "<td colspan=\"4\">$extra</td>\n" .
6022                       "</tr>\n";
6023         }
6024         print "</table>\n";
6025 }
6026
6027 sub git_tags_body {
6028         # uses global variable $project
6029         my ($taglist, $from, $to, $extra) = @_;
6030         $from = 0 unless defined $from;
6031         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
6032
6033         print "<table class=\"tags\">\n";
6034         my $alternate = 1;
6035         for (my $i = $from; $i <= $to; $i++) {
6036                 my $entry = $taglist->[$i];
6037                 my %tag = %$entry;
6038                 my $comment = $tag{'subject'};
6039                 my $comment_short;
6040                 if (defined $comment) {
6041                         $comment_short = chop_str($comment, 30, 5);
6042                 }
6043                 if ($alternate) {
6044                         print "<tr class=\"dark\">\n";
6045                 } else {
6046                         print "<tr class=\"light\">\n";
6047                 }
6048                 $alternate ^= 1;
6049                 if (defined $tag{'age'}) {
6050                         print "<td><i>$tag{'age'}</i></td>\n";
6051                 } else {
6052                         print "<td></td>\n";
6053                 }
6054                 print "<td>" .
6055                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
6056                                -class => "list name"}, esc_html($tag{'name'})) .
6057                       "</td>\n" .
6058                       "<td>";
6059                 if (defined $comment) {
6060                         print format_subject_html($comment, $comment_short,
6061                                                   href(action=>"tag", hash=>$tag{'id'}));
6062                 }
6063                 print "</td>\n" .
6064                       "<td class=\"selflink\">";
6065                 if ($tag{'type'} eq "tag") {
6066                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
6067                 } else {
6068                         print "&nbsp;";
6069                 }
6070                 print "</td>\n" .
6071                       "<td class=\"link\">" . " | " .
6072                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
6073                 if ($tag{'reftype'} eq "commit") {
6074                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
6075                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
6076                 } elsif ($tag{'reftype'} eq "blob") {
6077                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
6078                 }
6079                 print "</td>\n" .
6080                       "</tr>";
6081         }
6082         if (defined $extra) {
6083                 print "<tr>\n" .
6084                       "<td colspan=\"5\">$extra</td>\n" .
6085                       "</tr>\n";
6086         }
6087         print "</table>\n";
6088 }
6089
6090 sub git_heads_body {
6091         # uses global variable $project
6092         my ($headlist, $head_at, $from, $to, $extra) = @_;
6093         $from = 0 unless defined $from;
6094         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
6095
6096         print "<table class=\"heads\">\n";
6097         my $alternate = 1;
6098         for (my $i = $from; $i <= $to; $i++) {
6099                 my $entry = $headlist->[$i];
6100                 my %ref = %$entry;
6101                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
6102                 if ($alternate) {
6103                         print "<tr class=\"dark\">\n";
6104                 } else {
6105                         print "<tr class=\"light\">\n";
6106                 }
6107                 $alternate ^= 1;
6108                 print "<td><i>$ref{'age'}</i></td>\n" .
6109                       ($curr ? "<td class=\"current_head\">" : "<td>") .
6110                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
6111                                -class => "list name"},esc_html($ref{'name'})) .
6112                       "</td>\n" .
6113                       "<td class=\"link\">" .
6114                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
6115                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
6116                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
6117                       "</td>\n" .
6118                       "</tr>";
6119         }
6120         if (defined $extra) {
6121                 print "<tr>\n" .
6122                       "<td colspan=\"3\">$extra</td>\n" .
6123                       "</tr>\n";
6124         }
6125         print "</table>\n";
6126 }
6127
6128 # Display a single remote block
6129 sub git_remote_block {
6130         my ($remote, $rdata, $limit, $head) = @_;
6131
6132         my $heads = $rdata->{'heads'};
6133         my $fetch = $rdata->{'fetch'};
6134         my $push = $rdata->{'push'};
6135
6136         my $urls_table = "<table class=\"projects_list\">\n" ;
6137
6138         if (defined $fetch) {
6139                 if ($fetch eq $push) {
6140                         $urls_table .= format_repo_url("URL", $fetch);
6141                 } else {
6142                         $urls_table .= format_repo_url("Fetch URL", $fetch);
6143                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
6144                 }
6145         } elsif (defined $push) {
6146                 $urls_table .= format_repo_url("Push URL", $push);
6147         } else {
6148                 $urls_table .= format_repo_url("", "No remote URL");
6149         }
6150
6151         $urls_table .= "</table>\n";
6152
6153         my $dots;
6154         if (defined $limit && $limit < @$heads) {
6155                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6156         }
6157
6158         print $urls_table;
6159         git_heads_body($heads, $head, 0, $limit, $dots);
6160 }
6161
6162 # Display a list of remote names with the respective fetch and push URLs
6163 sub git_remotes_list {
6164         my ($remotedata, $limit) = @_;
6165         print "<table class=\"heads\">\n";
6166         my $alternate = 1;
6167         my @remotes = sort keys %$remotedata;
6168
6169         my $limited = $limit && $limit < @remotes;
6170
6171         $#remotes = $limit - 1 if $limited;
6172
6173         while (my $remote = shift @remotes) {
6174                 my $rdata = $remotedata->{$remote};
6175                 my $fetch = $rdata->{'fetch'};
6176                 my $push = $rdata->{'push'};
6177                 if ($alternate) {
6178                         print "<tr class=\"dark\">\n";
6179                 } else {
6180                         print "<tr class=\"light\">\n";
6181                 }
6182                 $alternate ^= 1;
6183                 print "<td>" .
6184                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6185                                -class=> "list name"},esc_html($remote)) .
6186                       "</td>";
6187                 print "<td class=\"link\">" .
6188                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6189                       " | " .
6190                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6191                       "</td>";
6192
6193                 print "</tr>\n";
6194         }
6195
6196         if ($limited) {
6197                 print "<tr>\n" .
6198                       "<td colspan=\"3\">" .
6199                       $cgi->a({-href => href(action=>"remotes")}, "...") .
6200                       "</td>\n" . "</tr>\n";
6201         }
6202
6203         print "</table>";
6204 }
6205
6206 # Display remote heads grouped by remote, unless there are too many
6207 # remotes, in which case we only display the remote names
6208 sub git_remotes_body {
6209         my ($remotedata, $limit, $head) = @_;
6210         if ($limit and $limit < keys %$remotedata) {
6211                 git_remotes_list($remotedata, $limit);
6212         } else {
6213                 fill_remote_heads($remotedata);
6214                 while (my ($remote, $rdata) = each %$remotedata) {
6215                         git_print_section({-class=>"remote", -id=>$remote},
6216                                 ["remotes", $remote, $remote], sub {
6217                                         git_remote_block($remote, $rdata, $limit, $head);
6218                                 });
6219                 }
6220         }
6221 }
6222
6223 sub git_search_message {
6224         my %co = @_;
6225
6226         my $greptype;
6227         if ($searchtype eq 'commit') {
6228                 $greptype = "--grep=";
6229         } elsif ($searchtype eq 'author') {
6230                 $greptype = "--author=";
6231         } elsif ($searchtype eq 'committer') {
6232                 $greptype = "--committer=";
6233         }
6234         $greptype .= $searchtext;
6235         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6236                                        $greptype, '--regexp-ignore-case',
6237                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6238
6239         my $paging_nav = '';
6240         if ($page > 0) {
6241                 $paging_nav .=
6242                         $cgi->a({-href => href(-replay=>1, page=>undef)},
6243                                 "first") .
6244                         " &sdot; " .
6245                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6246                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6247         } else {
6248                 $paging_nav .= "first &sdot; prev";
6249         }
6250         my $next_link = '';
6251         if ($#commitlist >= 100) {
6252                 $next_link =
6253                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6254                                  -accesskey => "n", -title => "Alt-n"}, "next");
6255                 $paging_nav .= " &sdot; $next_link";
6256         } else {
6257                 $paging_nav .= " &sdot; next";
6258         }
6259
6260         git_header_html();
6261
6262         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6263         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6264         if ($page == 0 && !@commitlist) {
6265                 print "<p>No match.</p>\n";
6266         } else {
6267                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6268         }
6269
6270         git_footer_html();
6271 }
6272
6273 sub git_search_changes {
6274         my %co = @_;
6275
6276         local $/ = "\n";
6277         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6278                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6279                 ($search_use_regexp ? '--pickaxe-regex' : ())
6280                         or die_error(500, "Open git-log failed");
6281
6282         git_header_html();
6283
6284         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6285         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6286
6287         print "<table class=\"pickaxe search\">\n";
6288         my $alternate = 1;
6289         undef %co;
6290         my @files;
6291         while (my $line = <$fd>) {
6292                 chomp $line;
6293                 next unless $line;
6294
6295                 my %set = parse_difftree_raw_line($line);
6296                 if (defined $set{'commit'}) {
6297                         # finish previous commit
6298                         if (%co) {
6299                                 print "</td>\n" .
6300                                       "<td class=\"link\">" .
6301                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6302                                               "commit") .
6303                                       " | " .
6304                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6305                                                              hash_base=>$co{'id'})},
6306                                               "tree") .
6307                                       "</td>\n" .
6308                                       "</tr>\n";
6309                         }
6310
6311                         if ($alternate) {
6312                                 print "<tr class=\"dark\">\n";
6313                         } else {
6314                                 print "<tr class=\"light\">\n";
6315                         }
6316                         $alternate ^= 1;
6317                         %co = parse_commit($set{'commit'});
6318                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6319                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6320                               "<td><i>$author</i></td>\n" .
6321                               "<td>" .
6322                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6323                                       -class => "list subject"},
6324                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6325                 } elsif (defined $set{'to_id'}) {
6326                         next if is_deleted(\%set);
6327
6328                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6329                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6330                                       -class => "list"},
6331                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6332                               "<br/>\n";
6333                 }
6334         }
6335         close $fd;
6336
6337         # finish last commit (warning: repetition!)
6338         if (%co) {
6339                 print "</td>\n" .
6340                       "<td class=\"link\">" .
6341                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6342                               "commit") .
6343                       " | " .
6344                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6345                                              hash_base=>$co{'id'})},
6346                               "tree") .
6347                       "</td>\n" .
6348                       "</tr>\n";
6349         }
6350
6351         print "</table>\n";
6352
6353         git_footer_html();
6354 }
6355
6356 sub git_search_files {
6357         my %co = @_;
6358
6359         local $/ = "\n";
6360         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6361                 $search_use_regexp ? ('-E', '-i') : '-F',
6362                 $searchtext, $co{'tree'}
6363                         or die_error(500, "Open git-grep failed");
6364
6365         git_header_html();
6366
6367         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6368         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6369
6370         print "<table class=\"grep_search\">\n";
6371         my $alternate = 1;
6372         my $matches = 0;
6373         my $lastfile = '';
6374         my $file_href;
6375         while (my $line = <$fd>) {
6376                 chomp $line;
6377                 my ($file, $lno, $ltext, $binary);
6378                 last if ($matches++ > 1000);
6379                 if ($line =~ /^Binary file (.+) matches$/) {
6380                         $file = $1;
6381                         $binary = 1;
6382                 } else {
6383                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6384                         $file =~ s/^$co{'tree'}://;
6385                 }
6386                 if ($file ne $lastfile) {
6387                         $lastfile and print "</td></tr>\n";
6388                         if ($alternate++) {
6389                                 print "<tr class=\"dark\">\n";
6390                         } else {
6391                                 print "<tr class=\"light\">\n";
6392                         }
6393                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6394                                           file_name=>$file);
6395                         print "<td class=\"list\">".
6396                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6397                         print "</td><td>\n";
6398                         $lastfile = $file;
6399                 }
6400                 if ($binary) {
6401                         print "<div class=\"binary\">Binary file</div>\n";
6402                 } else {
6403                         $ltext = untabify($ltext);
6404                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6405                                 $ltext = esc_html($1, -nbsp=>1);
6406                                 $ltext .= '<span class="match">';
6407                                 $ltext .= esc_html($2, -nbsp=>1);
6408                                 $ltext .= '</span>';
6409                                 $ltext .= esc_html($3, -nbsp=>1);
6410                         } else {
6411                                 $ltext = esc_html($ltext, -nbsp=>1);
6412                         }
6413                         print "<div class=\"pre\">" .
6414                                 $cgi->a({-href => $file_href.'#l'.$lno,
6415                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6416                                 ' ' .  $ltext . "</div>\n";
6417                 }
6418         }
6419         if ($lastfile) {
6420                 print "</td></tr>\n";
6421                 if ($matches > 1000) {
6422                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6423                 }
6424         } else {
6425                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6426         }
6427         close $fd;
6428
6429         print "</table>\n";
6430
6431         git_footer_html();
6432 }
6433
6434 sub git_search_grep_body {
6435         my ($commitlist, $from, $to, $extra) = @_;
6436         $from = 0 unless defined $from;
6437         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6438
6439         print "<table class=\"commit_search\">\n";
6440         my $alternate = 1;
6441         for (my $i = $from; $i <= $to; $i++) {
6442                 my %co = %{$commitlist->[$i]};
6443                 if (!%co) {
6444                         next;
6445                 }
6446                 my $commit = $co{'id'};
6447                 if ($alternate) {
6448                         print "<tr class=\"dark\">\n";
6449                 } else {
6450                         print "<tr class=\"light\">\n";
6451                 }
6452                 $alternate ^= 1;
6453                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6454                       format_author_html('td', \%co, 15, 5) .
6455                       "<td>" .
6456                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6457                                -class => "list subject"},
6458                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6459                 my $comment = $co{'comment'};
6460                 foreach my $line (@$comment) {
6461                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6462                                 my ($lead, $match, $trail) = ($1, $2, $3);
6463                                 $match = chop_str($match, 70, 5, 'center');
6464                                 my $contextlen = int((80 - length($match))/2);
6465                                 $contextlen = 30 if ($contextlen > 30);
6466                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6467                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6468
6469                                 $lead  = esc_html($lead);
6470                                 $match = esc_html($match);
6471                                 $trail = esc_html($trail);
6472
6473                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6474                         }
6475                 }
6476                 print "</td>\n" .
6477                       "<td class=\"link\">" .
6478                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6479                       " | " .
6480                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6481                       " | " .
6482                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6483                 print "</td>\n" .
6484                       "</tr>\n";
6485         }
6486         if (defined $extra) {
6487                 print "<tr>\n" .
6488                       "<td colspan=\"3\">$extra</td>\n" .
6489                       "</tr>\n";
6490         }
6491         print "</table>\n";
6492 }
6493
6494 ## ======================================================================
6495 ## ======================================================================
6496 ## actions
6497
6498 sub git_project_list {
6499         my $order = $input_params{'order'};
6500         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6501                 die_error(400, "Unknown order parameter");
6502         }
6503
6504         my @list = git_get_projects_list($project_filter, $strict_export);
6505         if (!@list) {
6506                 die_error(404, "No projects found");
6507         }
6508
6509         git_header_html();
6510         if (defined $home_text && -f $home_text) {
6511                 print "<div class=\"index_include\">\n";
6512                 insert_file($home_text);
6513                 print "</div>\n";
6514         }
6515
6516         git_project_search_form($searchtext, $search_use_regexp);
6517         git_project_list_body(\@list, $order);
6518         git_footer_html();
6519 }
6520
6521 sub git_forks {
6522         my $order = $input_params{'order'};
6523         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6524                 die_error(400, "Unknown order parameter");
6525         }
6526
6527         my $filter = $project;
6528         $filter =~ s/\.git$//;
6529         my @list = git_get_projects_list($filter);
6530         if (!@list) {
6531                 die_error(404, "No forks found");
6532         }
6533
6534         git_header_html();
6535         git_print_page_nav('','');
6536         git_print_header_div('summary', "$project forks");
6537         git_project_list_body(\@list, $order);
6538         git_footer_html();
6539 }
6540
6541 sub git_project_index {
6542         my @projects = git_get_projects_list($project_filter, $strict_export);
6543         if (!@projects) {
6544                 die_error(404, "No projects found");
6545         }
6546
6547         print $cgi->header(
6548                 -type => 'text/plain',
6549                 -charset => 'utf-8',
6550                 -content_disposition => 'inline; filename="index.aux"');
6551
6552         foreach my $pr (@projects) {
6553                 if (!exists $pr->{'owner'}) {
6554                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6555                 }
6556
6557                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6558                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6559                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6560                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6561                 $path  =~ s/ /\+/g;
6562                 $owner =~ s/ /\+/g;
6563
6564                 print "$path $owner\n";
6565         }
6566 }
6567
6568 sub git_summary {
6569         my $descr = git_get_project_description($project) || "none";
6570         my %co = parse_commit("HEAD");
6571         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6572         my $head = $co{'id'};
6573         my $remote_heads = gitweb_check_feature('remote_heads');
6574
6575         my $owner = git_get_project_owner($project);
6576
6577         my $refs = git_get_references();
6578         # These get_*_list functions return one more to allow us to see if
6579         # there are more ...
6580         my @taglist  = git_get_tags_list(16);
6581         my @headlist = git_get_heads_list(16);
6582         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6583         my @forklist;
6584         my $check_forks = gitweb_check_feature('forks');
6585
6586         if ($check_forks) {
6587                 # find forks of a project
6588                 my $filter = $project;
6589                 $filter =~ s/\.git$//;
6590                 @forklist = git_get_projects_list($filter);
6591                 # filter out forks of forks
6592                 @forklist = filter_forks_from_projects_list(\@forklist)
6593                         if (@forklist);
6594         }
6595
6596         git_header_html();
6597         git_print_page_nav('summary','', $head);
6598
6599         print "<div class=\"title\">&nbsp;</div>\n";
6600         print "<table class=\"projects_list\">\n" .
6601               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6602         if ($owner and not $omit_owner) {
6603                 print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6604         }
6605         if (defined $cd{'rfc2822'}) {
6606                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6607                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6608         }
6609
6610         # use per project git URL list in $projectroot/$project/cloneurl
6611         # or make project git URL from git base URL and project name
6612         my $url_tag = "URL";
6613         my @url_list = git_get_project_url_list($project);
6614         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6615         foreach my $git_url (@url_list) {
6616                 next unless $git_url;
6617                 print format_repo_url($url_tag, $git_url);
6618                 $url_tag = "";
6619         }
6620
6621         # Tag cloud
6622         my $show_ctags = gitweb_check_feature('ctags');
6623         if ($show_ctags) {
6624                 my $ctags = git_get_project_ctags($project);
6625                 if (%$ctags) {
6626                         # without ability to add tags, don't show if there are none
6627                         my $cloud = git_populate_project_tagcloud($ctags);
6628                         print "<tr id=\"metadata_ctags\">" .
6629                               "<td>content tags</td>" .
6630                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6631                               "</tr>\n";
6632                 }
6633         }
6634
6635         print "</table>\n";
6636
6637         # If XSS prevention is on, we don't include README.html.
6638         # TODO: Allow a readme in some safe format.
6639         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6640                 print "<div class=\"title\">readme</div>\n" .
6641                       "<div class=\"readme\">\n";
6642                 insert_file("$projectroot/$project/README.html");
6643                 print "\n</div>\n"; # class="readme"
6644         }
6645
6646         # we need to request one more than 16 (0..15) to check if
6647         # those 16 are all
6648         my @commitlist = $head ? parse_commits($head, 17) : ();
6649         if (@commitlist) {
6650                 git_print_header_div('shortlog');
6651                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6652                                   $#commitlist <=  15 ? undef :
6653                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6654         }
6655
6656         if (@taglist) {
6657                 git_print_header_div('tags');
6658                 git_tags_body(\@taglist, 0, 15,
6659                               $#taglist <=  15 ? undef :
6660                               $cgi->a({-href => href(action=>"tags")}, "..."));
6661         }
6662
6663         if (@headlist) {
6664                 git_print_header_div('heads');
6665                 git_heads_body(\@headlist, $head, 0, 15,
6666                                $#headlist <= 15 ? undef :
6667                                $cgi->a({-href => href(action=>"heads")}, "..."));
6668         }
6669
6670         if (%remotedata) {
6671                 git_print_header_div('remotes');
6672                 git_remotes_body(\%remotedata, 15, $head);
6673         }
6674
6675         if (@forklist) {
6676                 git_print_header_div('forks');
6677                 git_project_list_body(\@forklist, 'age', 0, 15,
6678                                       $#forklist <= 15 ? undef :
6679                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6680                                       'no_header');
6681         }
6682
6683         git_footer_html();
6684 }
6685
6686 sub git_tag {
6687         my %tag = parse_tag($hash);
6688
6689         if (! %tag) {
6690                 die_error(404, "Unknown tag object");
6691         }
6692
6693         my $head = git_get_head_hash($project);
6694         git_header_html();
6695         git_print_page_nav('','', $head,undef,$head);
6696         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6697         print "<div class=\"title_text\">\n" .
6698               "<table class=\"object_header\">\n" .
6699               "<tr>\n" .
6700               "<td>object</td>\n" .
6701               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6702                                $tag{'object'}) . "</td>\n" .
6703               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6704                                               $tag{'type'}) . "</td>\n" .
6705               "</tr>\n";
6706         if (defined($tag{'author'})) {
6707                 git_print_authorship_rows(\%tag, 'author');
6708         }
6709         print "</table>\n\n" .
6710               "</div>\n";
6711         print "<div class=\"page_body\">";
6712         my $comment = $tag{'comment'};
6713         foreach my $line (@$comment) {
6714                 chomp $line;
6715                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6716         }
6717         print "</div>\n";
6718         git_footer_html();
6719 }
6720
6721 sub git_blame_common {
6722         my $format = shift || 'porcelain';
6723         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6724                 $format = 'incremental';
6725                 $action = 'blame_incremental'; # for page title etc
6726         }
6727
6728         # permissions
6729         gitweb_check_feature('blame')
6730                 or die_error(403, "Blame view not allowed");
6731
6732         # error checking
6733         die_error(400, "No file name given") unless $file_name;
6734         $hash_base ||= git_get_head_hash($project);
6735         die_error(404, "Couldn't find base commit") unless $hash_base;
6736         my %co = parse_commit($hash_base)
6737                 or die_error(404, "Commit not found");
6738         my $ftype = "blob";
6739         if (!defined $hash) {
6740                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6741                         or die_error(404, "Error looking up file");
6742         } else {
6743                 $ftype = git_get_type($hash);
6744                 if ($ftype !~ "blob") {
6745                         die_error(400, "Object is not a blob");
6746                 }
6747         }
6748
6749         my $fd;
6750         if ($format eq 'incremental') {
6751                 # get file contents (as base)
6752                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6753                         or die_error(500, "Open git-cat-file failed");
6754         } elsif ($format eq 'data') {
6755                 # run git-blame --incremental
6756                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6757                         $hash_base, "--", $file_name
6758                         or die_error(500, "Open git-blame --incremental failed");
6759         } else {
6760                 # run git-blame --porcelain
6761                 open $fd, "-|", git_cmd(), "blame", '-p',
6762                         $hash_base, '--', $file_name
6763                         or die_error(500, "Open git-blame --porcelain failed");
6764         }
6765         binmode $fd, ':utf8';
6766
6767         # incremental blame data returns early
6768         if ($format eq 'data') {
6769                 print $cgi->header(
6770                         -type=>"text/plain", -charset => "utf-8",
6771                         -status=> "200 OK");
6772                 local $| = 1; # output autoflush
6773                 while (my $line = <$fd>) {
6774                         print to_utf8($line);
6775                 }
6776                 close $fd
6777                         or print "ERROR $!\n";
6778
6779                 print 'END';
6780                 if (defined $t0 && gitweb_check_feature('timed')) {
6781                         print ' '.
6782                               tv_interval($t0, [ gettimeofday() ]).
6783                               ' '.$number_of_git_cmds;
6784                 }
6785                 print "\n";
6786
6787                 return;
6788         }
6789
6790         # page header
6791         git_header_html();
6792         my $formats_nav =
6793                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6794                         "blob") .
6795                 " | ";
6796         if ($format eq 'incremental') {
6797                 $formats_nav .=
6798                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6799                                 "blame") . " (non-incremental)";
6800         } else {
6801                 $formats_nav .=
6802                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6803                                 "blame") . " (incremental)";
6804         }
6805         $formats_nav .=
6806                 " | " .
6807                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6808                         "history") .
6809                 " | " .
6810                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6811                         "HEAD");
6812         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6813         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6814         git_print_page_path($file_name, $ftype, $hash_base);
6815
6816         # page body
6817         if ($format eq 'incremental') {
6818                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6819                       "This page requires JavaScript to run.\n Use ".
6820                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6821                               'this page').
6822                       " instead.\n".
6823                       "</b></center></div>\n</noscript>\n";
6824
6825                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6826         }
6827
6828         print qq!<div class="page_body">\n!;
6829         print qq!<div id="progress_info">... / ...</div>\n!
6830                 if ($format eq 'incremental');
6831         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6832               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6833               qq!<thead>\n!.
6834               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6835               qq!</thead>\n!.
6836               qq!<tbody>\n!;
6837
6838         my @rev_color = qw(light dark);
6839         my $num_colors = scalar(@rev_color);
6840         my $current_color = 0;
6841
6842         if ($format eq 'incremental') {
6843                 my $color_class = $rev_color[$current_color];
6844
6845                 #contents of a file
6846                 my $linenr = 0;
6847         LINE:
6848                 while (my $line = <$fd>) {
6849                         chomp $line;
6850                         $linenr++;
6851
6852                         print qq!<tr id="l$linenr" class="$color_class">!.
6853                               qq!<td class="sha1"><a href=""> </a></td>!.
6854                               qq!<td class="linenr">!.
6855                               qq!<a class="linenr" href="">$linenr</a></td>!;
6856                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6857                         print qq!</tr>\n!;
6858                 }
6859
6860         } else { # porcelain, i.e. ordinary blame
6861                 my %metainfo = (); # saves information about commits
6862
6863                 # blame data
6864         LINE:
6865                 while (my $line = <$fd>) {
6866                         chomp $line;
6867                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6868                         # no <lines in group> for subsequent lines in group of lines
6869                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6870                            ($line =~ /^($oid_regex) (\d+) (\d+)(?: (\d+))?$/);
6871                         if (!exists $metainfo{$full_rev}) {
6872                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6873                         }
6874                         my $meta = $metainfo{$full_rev};
6875                         my $data;
6876                         while ($data = <$fd>) {
6877                                 chomp $data;
6878                                 last if ($data =~ s/^\t//); # contents of line
6879                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6880                                         $meta->{$1} = $2 unless exists $meta->{$1};
6881                                 }
6882                                 if ($data =~ /^previous /) {
6883                                         $meta->{'nprevious'}++;
6884                                 }
6885                         }
6886                         my $short_rev = substr($full_rev, 0, 8);
6887                         my $author = $meta->{'author'};
6888                         my %date =
6889                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6890                         my $date = $date{'iso-tz'};
6891                         if ($group_size) {
6892                                 $current_color = ($current_color + 1) % $num_colors;
6893                         }
6894                         my $tr_class = $rev_color[$current_color];
6895                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6896                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6897                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6898                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6899                         if ($group_size) {
6900                                 print "<td class=\"sha1\"";
6901                                 print " title=\"". esc_html($author) . ", $date\"";
6902                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6903                                 print ">";
6904                                 print $cgi->a({-href => href(action=>"commit",
6905                                                              hash=>$full_rev,
6906                                                              file_name=>$file_name)},
6907                                               esc_html($short_rev));
6908                                 if ($group_size >= 2) {
6909                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6910                                         if (@author_initials) {
6911                                                 print "<br />" .
6912                                                       esc_html(join('', @author_initials));
6913                                                 #           or join('.', ...)
6914                                         }
6915                                 }
6916                                 print "</td>\n";
6917                         }
6918                         # 'previous' <sha1 of parent commit> <filename at commit>
6919                         if (exists $meta->{'previous'} &&
6920                             $meta->{'previous'} =~ /^($oid_regex) (.*)$/) {
6921                                 $meta->{'parent'} = $1;
6922                                 $meta->{'file_parent'} = unquote($2);
6923                         }
6924                         my $linenr_commit =
6925                                 exists($meta->{'parent'}) ?
6926                                 $meta->{'parent'} : $full_rev;
6927                         my $linenr_filename =
6928                                 exists($meta->{'file_parent'}) ?
6929                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6930                         my $blamed = href(action => 'blame',
6931                                           file_name => $linenr_filename,
6932                                           hash_base => $linenr_commit);
6933                         print "<td class=\"linenr\">";
6934                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6935                                         -class => "linenr" },
6936                                       esc_html($lineno));
6937                         print "</td>";
6938                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6939                         print "</tr>\n";
6940                 } # end while
6941
6942         }
6943
6944         # footer
6945         print "</tbody>\n".
6946               "</table>\n"; # class="blame"
6947         print "</div>\n";   # class="blame_body"
6948         close $fd
6949                 or print "Reading blob failed\n";
6950
6951         git_footer_html();
6952 }
6953
6954 sub git_blame {
6955         git_blame_common();
6956 }
6957
6958 sub git_blame_incremental {
6959         git_blame_common('incremental');
6960 }
6961
6962 sub git_blame_data {
6963         git_blame_common('data');
6964 }
6965
6966 sub git_tags {
6967         my $head = git_get_head_hash($project);
6968         git_header_html();
6969         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6970         git_print_header_div('summary', $project);
6971
6972         my @tagslist = git_get_tags_list();
6973         if (@tagslist) {
6974                 git_tags_body(\@tagslist);
6975         }
6976         git_footer_html();
6977 }
6978
6979 sub git_heads {
6980         my $head = git_get_head_hash($project);
6981         git_header_html();
6982         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6983         git_print_header_div('summary', $project);
6984
6985         my @headslist = git_get_heads_list();
6986         if (@headslist) {
6987                 git_heads_body(\@headslist, $head);
6988         }
6989         git_footer_html();
6990 }
6991
6992 # used both for single remote view and for list of all the remotes
6993 sub git_remotes {
6994         gitweb_check_feature('remote_heads')
6995                 or die_error(403, "Remote heads view is disabled");
6996
6997         my $head = git_get_head_hash($project);
6998         my $remote = $input_params{'hash'};
6999
7000         my $remotedata = git_get_remotes_list($remote);
7001         die_error(500, "Unable to get remote information") unless defined $remotedata;
7002
7003         unless (%$remotedata) {
7004                 die_error(404, defined $remote ?
7005                         "Remote $remote not found" :
7006                         "No remotes found");
7007         }
7008
7009         git_header_html(undef, undef, -action_extra => $remote);
7010         git_print_page_nav('', '',  $head, undef, $head,
7011                 format_ref_views($remote ? '' : 'remotes'));
7012
7013         fill_remote_heads($remotedata);
7014         if (defined $remote) {
7015                 git_print_header_div('remotes', "$remote remote for $project");
7016                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
7017         } else {
7018                 git_print_header_div('summary', "$project remotes");
7019                 git_remotes_body($remotedata, undef, $head);
7020         }
7021
7022         git_footer_html();
7023 }
7024
7025 sub git_blob_plain {
7026         my $type = shift;
7027         my $expires;
7028
7029         if (!defined $hash) {
7030                 if (defined $file_name) {
7031                         my $base = $hash_base || git_get_head_hash($project);
7032                         $hash = git_get_hash_by_path($base, $file_name, "blob")
7033                                 or die_error(404, "Cannot find file");
7034                 } else {
7035                         die_error(400, "No file name defined");
7036                 }
7037         } elsif ($hash =~ m/^$oid_regex$/) {
7038                 # blobs defined by non-textual hash id's can be cached
7039                 $expires = "+1d";
7040         }
7041
7042         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
7043                 or die_error(500, "Open git-cat-file blob '$hash' failed");
7044
7045         # content-type (can include charset)
7046         $type = blob_contenttype($fd, $file_name, $type);
7047
7048         # "save as" filename, even when no $file_name is given
7049         my $save_as = "$hash";
7050         if (defined $file_name) {
7051                 $save_as = $file_name;
7052         } elsif ($type =~ m/^text\//) {
7053                 $save_as .= '.txt';
7054         }
7055
7056         # With XSS prevention on, blobs of all types except a few known safe
7057         # ones are served with "Content-Disposition: attachment" to make sure
7058         # they don't run in our security domain.  For certain image types,
7059         # blob view writes an <img> tag referring to blob_plain view, and we
7060         # want to be sure not to break that by serving the image as an
7061         # attachment (though Firefox 3 doesn't seem to care).
7062         my $sandbox = $prevent_xss &&
7063                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
7064
7065         # serve text/* as text/plain
7066         if ($prevent_xss &&
7067             ($type =~ m!^text/[a-z]+\b(.*)$! ||
7068              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
7069                 my $rest = $1;
7070                 $rest = defined $rest ? $rest : '';
7071                 $type = "text/plain$rest";
7072         }
7073
7074         print $cgi->header(
7075                 -type => $type,
7076                 -expires => $expires,
7077                 -content_disposition =>
7078                         ($sandbox ? 'attachment' : 'inline')
7079                         . '; filename="' . $save_as . '"');
7080         local $/ = undef;
7081         binmode STDOUT, ':raw';
7082         print <$fd>;
7083         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7084         close $fd;
7085 }
7086
7087 sub git_blob {
7088         my $expires;
7089
7090         if (!defined $hash) {
7091                 if (defined $file_name) {
7092                         my $base = $hash_base || git_get_head_hash($project);
7093                         $hash = git_get_hash_by_path($base, $file_name, "blob")
7094                                 or die_error(404, "Cannot find file");
7095                 } else {
7096                         die_error(400, "No file name defined");
7097                 }
7098         } elsif ($hash =~ m/^$oid_regex$/) {
7099                 # blobs defined by non-textual hash id's can be cached
7100                 $expires = "+1d";
7101         }
7102
7103         my $have_blame = gitweb_check_feature('blame');
7104         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
7105                 or die_error(500, "Couldn't cat $file_name, $hash");
7106         my $mimetype = blob_mimetype($fd, $file_name);
7107         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
7108         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
7109                 close $fd;
7110                 return git_blob_plain($mimetype);
7111         }
7112         # we can have blame only for text/* mimetype
7113         $have_blame &&= ($mimetype =~ m!^text/!);
7114
7115         my $highlight = gitweb_check_feature('highlight');
7116         my $syntax = guess_file_syntax($highlight, $file_name);
7117         $fd = run_highlighter($fd, $highlight, $syntax);
7118
7119         git_header_html(undef, $expires);
7120         my $formats_nav = '';
7121         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7122                 if (defined $file_name) {
7123                         if ($have_blame) {
7124                                 $formats_nav .=
7125                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
7126                                                 "blame") .
7127                                         " | ";
7128                         }
7129                         $formats_nav .=
7130                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7131                                         "history") .
7132                                 " | " .
7133                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7134                                         "raw") .
7135                                 " | " .
7136                                 $cgi->a({-href => href(action=>"blob",
7137                                                        hash_base=>"HEAD", file_name=>$file_name)},
7138                                         "HEAD");
7139                 } else {
7140                         $formats_nav .=
7141                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7142                                         "raw");
7143                 }
7144                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7145                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7146         } else {
7147                 print "<div class=\"page_nav\">\n" .
7148                       "<br/><br/></div>\n" .
7149                       "<div class=\"title\">".esc_html($hash)."</div>\n";
7150         }
7151         git_print_page_path($file_name, "blob", $hash_base);
7152         print "<div class=\"page_body\">\n";
7153         if ($mimetype =~ m!^image/!) {
7154                 print qq!<img class="blob" type="!.esc_attr($mimetype).qq!"!;
7155                 if ($file_name) {
7156                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7157                 }
7158                 print qq! src="! .
7159                       href(action=>"blob_plain", hash=>$hash,
7160                            hash_base=>$hash_base, file_name=>$file_name) .
7161                       qq!" />\n!;
7162         } else {
7163                 my $nr;
7164                 while (my $line = <$fd>) {
7165                         chomp $line;
7166                         $nr++;
7167                         $line = untabify($line);
7168                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7169                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7170                                $highlight ? sanitize($line) : esc_html($line, -nbsp=>1);
7171                 }
7172         }
7173         close $fd
7174                 or print "Reading blob failed.\n";
7175         print "</div>";
7176         git_footer_html();
7177 }
7178
7179 sub git_tree {
7180         if (!defined $hash_base) {
7181                 $hash_base = "HEAD";
7182         }
7183         if (!defined $hash) {
7184                 if (defined $file_name) {
7185                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7186                 } else {
7187                         $hash = $hash_base;
7188                 }
7189         }
7190         die_error(404, "No such tree") unless defined($hash);
7191
7192         my $show_sizes = gitweb_check_feature('show-sizes');
7193         my $have_blame = gitweb_check_feature('blame');
7194
7195         my @entries = ();
7196         {
7197                 local $/ = "\0";
7198                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7199                         ($show_sizes ? '-l' : ()), @extra_options, $hash
7200                         or die_error(500, "Open git-ls-tree failed");
7201                 @entries = map { chomp; $_ } <$fd>;
7202                 close $fd
7203                         or die_error(404, "Reading tree failed");
7204         }
7205
7206         my $refs = git_get_references();
7207         my $ref = format_ref_marker($refs, $hash_base);
7208         git_header_html();
7209         my $basedir = '';
7210         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7211                 my @views_nav = ();
7212                 if (defined $file_name) {
7213                         push @views_nav,
7214                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7215                                         "history"),
7216                                 $cgi->a({-href => href(action=>"tree",
7217                                                        hash_base=>"HEAD", file_name=>$file_name)},
7218                                         "HEAD"),
7219                 }
7220                 my $snapshot_links = format_snapshot_links($hash);
7221                 if (defined $snapshot_links) {
7222                         # FIXME: Should be available when we have no hash base as well.
7223                         push @views_nav, $snapshot_links;
7224                 }
7225                 git_print_page_nav('tree','', $hash_base, undef, undef,
7226                                    join(' | ', @views_nav));
7227                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7228         } else {
7229                 undef $hash_base;
7230                 print "<div class=\"page_nav\">\n";
7231                 print "<br/><br/></div>\n";
7232                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7233         }
7234         if (defined $file_name) {
7235                 $basedir = $file_name;
7236                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7237                         $basedir .= '/';
7238                 }
7239                 git_print_page_path($file_name, 'tree', $hash_base);
7240         }
7241         print "<div class=\"page_body\">\n";
7242         print "<table class=\"tree\">\n";
7243         my $alternate = 1;
7244         # '..' (top directory) link if possible
7245         if (defined $hash_base &&
7246             defined $file_name && $file_name =~ m![^/]+$!) {
7247                 if ($alternate) {
7248                         print "<tr class=\"dark\">\n";
7249                 } else {
7250                         print "<tr class=\"light\">\n";
7251                 }
7252                 $alternate ^= 1;
7253
7254                 my $up = $file_name;
7255                 $up =~ s!/?[^/]+$!!;
7256                 undef $up unless $up;
7257                 # based on git_print_tree_entry
7258                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7259                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7260                 print '<td class="list">';
7261                 print $cgi->a({-href => href(action=>"tree",
7262                                              hash_base=>$hash_base,
7263                                              file_name=>$up)},
7264                               "..");
7265                 print "</td>\n";
7266                 print "<td class=\"link\"></td>\n";
7267
7268                 print "</tr>\n";
7269         }
7270         foreach my $line (@entries) {
7271                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7272
7273                 if ($alternate) {
7274                         print "<tr class=\"dark\">\n";
7275                 } else {
7276                         print "<tr class=\"light\">\n";
7277                 }
7278                 $alternate ^= 1;
7279
7280                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7281
7282                 print "</tr>\n";
7283         }
7284         print "</table>\n" .
7285               "</div>";
7286         git_footer_html();
7287 }
7288
7289 sub sanitize_for_filename {
7290     my $name = shift;
7291
7292     $name =~ s!/!-!g;
7293     $name =~ s/[^[:alnum:]_.-]//g;
7294
7295     return $name;
7296 }
7297
7298 sub snapshot_name {
7299         my ($project, $hash) = @_;
7300
7301         # path/to/project.git  -> project
7302         # path/to/project/.git -> project
7303         my $name = to_utf8($project);
7304         $name =~ s,([^/])/*\.git$,$1,;
7305         $name = sanitize_for_filename(basename($name));
7306
7307         my $ver = $hash;
7308         if ($hash =~ /^[0-9a-fA-F]+$/) {
7309                 # shorten SHA-1 hash
7310                 my $full_hash = git_get_full_hash($project, $hash);
7311                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7312                         $ver = git_get_short_hash($project, $hash);
7313                 }
7314         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7315                 # tags don't need shortened SHA-1 hash
7316                 $ver = $1;
7317         } else {
7318                 # branches and other need shortened SHA-1 hash
7319                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
7320                 if ($hash =~ m!^refs/($strip_refs|remotes)/(.*)$!) {
7321                         my $ref_dir = (defined $1) ? $1 : '';
7322                         $ver = $2;
7323
7324                         $ref_dir = sanitize_for_filename($ref_dir);
7325                         # for refs neither in heads nor remotes we want to
7326                         # add a ref dir to archive name
7327                         if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
7328                                 $ver = $ref_dir . '-' . $ver;
7329                         }
7330                 }
7331                 $ver .= '-' . git_get_short_hash($project, $hash);
7332         }
7333         # special case of sanitization for filename - we change
7334         # slashes to dots instead of dashes
7335         # in case of hierarchical branch names
7336         $ver =~ s!/!.!g;
7337         $ver =~ s/[^[:alnum:]_.-]//g;
7338
7339         # name = project-version_string
7340         $name = "$name-$ver";
7341
7342         return wantarray ? ($name, $name) : $name;
7343 }
7344
7345 sub exit_if_unmodified_since {
7346         my ($latest_epoch) = @_;
7347         our $cgi;
7348
7349         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7350         if (defined $if_modified) {
7351                 my $since;
7352                 if (eval { require HTTP::Date; 1; }) {
7353                         $since = HTTP::Date::str2time($if_modified);
7354                 } elsif (eval { require Time::ParseDate; 1; }) {
7355                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7356                 }
7357                 if (defined $since && $latest_epoch <= $since) {
7358                         my %latest_date = parse_date($latest_epoch);
7359                         print $cgi->header(
7360                                 -last_modified => $latest_date{'rfc2822'},
7361                                 -status => '304 Not Modified');
7362                         goto DONE_GITWEB;
7363                 }
7364         }
7365 }
7366
7367 sub git_snapshot {
7368         my $format = $input_params{'snapshot_format'};
7369         if (!@snapshot_fmts) {
7370                 die_error(403, "Snapshots not allowed");
7371         }
7372         # default to first supported snapshot format
7373         $format ||= $snapshot_fmts[0];
7374         if ($format !~ m/^[a-z0-9]+$/) {
7375                 die_error(400, "Invalid snapshot format parameter");
7376         } elsif (!exists($known_snapshot_formats{$format})) {
7377                 die_error(400, "Unknown snapshot format");
7378         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7379                 die_error(403, "Snapshot format not allowed");
7380         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7381                 die_error(403, "Unsupported snapshot format");
7382         }
7383
7384         my $type = git_get_type("$hash^{}");
7385         if (!$type) {
7386                 die_error(404, 'Object does not exist');
7387         }  elsif ($type eq 'blob') {
7388                 die_error(400, 'Object is not a tree-ish');
7389         }
7390
7391         my ($name, $prefix) = snapshot_name($project, $hash);
7392         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7393
7394         my %co = parse_commit($hash);
7395         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7396
7397         my $cmd = quote_command(
7398                 git_cmd(), 'archive',
7399                 "--format=$known_snapshot_formats{$format}{'format'}",
7400                 "--prefix=$prefix/", $hash);
7401         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7402                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7403         }
7404
7405         $filename =~ s/(["\\])/\\$1/g;
7406         my %latest_date;
7407         if (%co) {
7408                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7409         }
7410
7411         print $cgi->header(
7412                 -type => $known_snapshot_formats{$format}{'type'},
7413                 -content_disposition => 'inline; filename="' . $filename . '"',
7414                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7415                 -status => '200 OK');
7416
7417         open my $fd, "-|", $cmd
7418                 or die_error(500, "Execute git-archive failed");
7419         binmode STDOUT, ':raw';
7420         print <$fd>;
7421         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7422         close $fd;
7423 }
7424
7425 sub git_log_generic {
7426         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7427
7428         my $head = git_get_head_hash($project);
7429         if (!defined $base) {
7430                 $base = $head;
7431         }
7432         if (!defined $page) {
7433                 $page = 0;
7434         }
7435         my $refs = git_get_references();
7436
7437         my $commit_hash = $base;
7438         if (defined $parent) {
7439                 $commit_hash = "$parent..$base";
7440         }
7441         my @commitlist =
7442                 parse_commits($commit_hash, 101, (100 * $page),
7443                               defined $file_name ? ($file_name, "--full-history") : ());
7444
7445         my $ftype;
7446         if (!defined $file_hash && defined $file_name) {
7447                 # some commits could have deleted file in question,
7448                 # and not have it in tree, but one of them has to have it
7449                 for (my $i = 0; $i < @commitlist; $i++) {
7450                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7451                         last if defined $file_hash;
7452                 }
7453         }
7454         if (defined $file_hash) {
7455                 $ftype = git_get_type($file_hash);
7456         }
7457         if (defined $file_name && !defined $ftype) {
7458                 die_error(500, "Unknown type of object");
7459         }
7460         my %co;
7461         if (defined $file_name) {
7462                 %co = parse_commit($base)
7463                         or die_error(404, "Unknown commit object");
7464         }
7465
7466
7467         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7468         my $next_link = '';
7469         if ($#commitlist >= 100) {
7470                 $next_link =
7471                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7472                                  -accesskey => "n", -title => "Alt-n"}, "next");
7473         }
7474         my $patch_max = gitweb_get_feature('patches');
7475         if ($patch_max && !defined $file_name) {
7476                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7477                         $paging_nav .= " &sdot; " .
7478                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7479                                         "patches");
7480                 }
7481         }
7482
7483         git_header_html();
7484         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7485         if (defined $file_name) {
7486                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7487         } else {
7488                 git_print_header_div('summary', $project)
7489         }
7490         git_print_page_path($file_name, $ftype, $hash_base)
7491                 if (defined $file_name);
7492
7493         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7494                      $file_name, $file_hash, $ftype);
7495
7496         git_footer_html();
7497 }
7498
7499 sub git_log {
7500         git_log_generic('log', \&git_log_body,
7501                         $hash, $hash_parent);
7502 }
7503
7504 sub git_commit {
7505         $hash ||= $hash_base || "HEAD";
7506         my %co = parse_commit($hash)
7507             or die_error(404, "Unknown commit object");
7508
7509         my $parent  = $co{'parent'};
7510         my $parents = $co{'parents'}; # listref
7511
7512         # we need to prepare $formats_nav before any parameter munging
7513         my $formats_nav;
7514         if (!defined $parent) {
7515                 # --root commitdiff
7516                 $formats_nav .= '(initial)';
7517         } elsif (@$parents == 1) {
7518                 # single parent commit
7519                 $formats_nav .=
7520                         '(parent: ' .
7521                         $cgi->a({-href => href(action=>"commit",
7522                                                hash=>$parent)},
7523                                 esc_html(substr($parent, 0, 7))) .
7524                         ')';
7525         } else {
7526                 # merge commit
7527                 $formats_nav .=
7528                         '(merge: ' .
7529                         join(' ', map {
7530                                 $cgi->a({-href => href(action=>"commit",
7531                                                        hash=>$_)},
7532                                         esc_html(substr($_, 0, 7)));
7533                         } @$parents ) .
7534                         ')';
7535         }
7536         if (gitweb_check_feature('patches') && @$parents <= 1) {
7537                 $formats_nav .= " | " .
7538                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7539                                 "patch");
7540         }
7541
7542         if (!defined $parent) {
7543                 $parent = "--root";
7544         }
7545         my @difftree;
7546         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7547                 @diff_opts,
7548                 (@$parents <= 1 ? $parent : '-c'),
7549                 $hash, "--"
7550                 or die_error(500, "Open git-diff-tree failed");
7551         @difftree = map { chomp; $_ } <$fd>;
7552         close $fd or die_error(404, "Reading git-diff-tree failed");
7553
7554         # non-textual hash id's can be cached
7555         my $expires;
7556         if ($hash =~ m/^$oid_regex$/) {
7557                 $expires = "+1d";
7558         }
7559         my $refs = git_get_references();
7560         my $ref = format_ref_marker($refs, $co{'id'});
7561
7562         git_header_html(undef, $expires);
7563         git_print_page_nav('commit', '',
7564                            $hash, $co{'tree'}, $hash,
7565                            $formats_nav);
7566
7567         if (defined $co{'parent'}) {
7568                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7569         } else {
7570                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7571         }
7572         print "<div class=\"title_text\">\n" .
7573               "<table class=\"object_header\">\n";
7574         git_print_authorship_rows(\%co);
7575         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7576         print "<tr>" .
7577               "<td>tree</td>" .
7578               "<td class=\"sha1\">" .
7579               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7580                        class => "list"}, $co{'tree'}) .
7581               "</td>" .
7582               "<td class=\"link\">" .
7583               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7584                       "tree");
7585         my $snapshot_links = format_snapshot_links($hash);
7586         if (defined $snapshot_links) {
7587                 print " | " . $snapshot_links;
7588         }
7589         print "</td>" .
7590               "</tr>\n";
7591
7592         foreach my $par (@$parents) {
7593                 print "<tr>" .
7594                       "<td>parent</td>" .
7595                       "<td class=\"sha1\">" .
7596                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7597                                class => "list"}, $par) .
7598                       "</td>" .
7599                       "<td class=\"link\">" .
7600                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7601                       " | " .
7602                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7603                       "</td>" .
7604                       "</tr>\n";
7605         }
7606         print "</table>".
7607               "</div>\n";
7608
7609         print "<div class=\"page_body\">\n";
7610         git_print_log($co{'comment'});
7611         print "</div>\n";
7612
7613         git_difftree_body(\@difftree, $hash, @$parents);
7614
7615         git_footer_html();
7616 }
7617
7618 sub git_object {
7619         # object is defined by:
7620         # - hash or hash_base alone
7621         # - hash_base and file_name
7622         my $type;
7623
7624         # - hash or hash_base alone
7625         if ($hash || ($hash_base && !defined $file_name)) {
7626                 my $object_id = $hash || $hash_base;
7627
7628                 open my $fd, "-|", quote_command(
7629                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7630                         or die_error(404, "Object does not exist");
7631                 $type = <$fd>;
7632                 defined $type && chomp $type;
7633                 close $fd
7634                         or die_error(404, "Object does not exist");
7635
7636         # - hash_base and file_name
7637         } elsif ($hash_base && defined $file_name) {
7638                 $file_name =~ s,/+$,,;
7639
7640                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7641                         or die_error(404, "Base object does not exist");
7642
7643                 # here errors should not happen
7644                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7645                         or die_error(500, "Open git-ls-tree failed");
7646                 my $line = <$fd>;
7647                 close $fd;
7648
7649                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7650                 unless ($line && $line =~ m/^([0-9]+) (.+) ($oid_regex)\t/) {
7651                         die_error(404, "File or directory for given base does not exist");
7652                 }
7653                 $type = $2;
7654                 $hash = $3;
7655         } else {
7656                 die_error(400, "Not enough information to find object");
7657         }
7658
7659         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7660                                           hash=>$hash, hash_base=>$hash_base,
7661                                           file_name=>$file_name),
7662                              -status => '302 Found');
7663 }
7664
7665 sub git_blobdiff {
7666         my $format = shift || 'html';
7667         my $diff_style = $input_params{'diff_style'} || 'inline';
7668
7669         my $fd;
7670         my @difftree;
7671         my %diffinfo;
7672         my $expires;
7673
7674         # preparing $fd and %diffinfo for git_patchset_body
7675         # new style URI
7676         if (defined $hash_base && defined $hash_parent_base) {
7677                 if (defined $file_name) {
7678                         # read raw output
7679                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7680                                 $hash_parent_base, $hash_base,
7681                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7682                                 or die_error(500, "Open git-diff-tree failed");
7683                         @difftree = map { chomp; $_ } <$fd>;
7684                         close $fd
7685                                 or die_error(404, "Reading git-diff-tree failed");
7686                         @difftree
7687                                 or die_error(404, "Blob diff not found");
7688
7689                 } elsif (defined $hash &&
7690                          $hash =~ $oid_regex) {
7691                         # try to find filename from $hash
7692
7693                         # read filtered raw output
7694                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7695                                 $hash_parent_base, $hash_base, "--"
7696                                 or die_error(500, "Open git-diff-tree failed");
7697                         @difftree =
7698                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7699                                 # $hash == to_id
7700                                 grep { /^:[0-7]{6} [0-7]{6} $oid_regex $hash/ }
7701                                 map { chomp; $_ } <$fd>;
7702                         close $fd
7703                                 or die_error(404, "Reading git-diff-tree failed");
7704                         @difftree
7705                                 or die_error(404, "Blob diff not found");
7706
7707                 } else {
7708                         die_error(400, "Missing one of the blob diff parameters");
7709                 }
7710
7711                 if (@difftree > 1) {
7712                         die_error(400, "Ambiguous blob diff specification");
7713                 }
7714
7715                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7716                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7717                 $file_name   ||= $diffinfo{'to_file'};
7718
7719                 $hash_parent ||= $diffinfo{'from_id'};
7720                 $hash        ||= $diffinfo{'to_id'};
7721
7722                 # non-textual hash id's can be cached
7723                 if ($hash_base =~ m/^$oid_regex$/ &&
7724                     $hash_parent_base =~ m/^$oid_regex$/) {
7725                         $expires = '+1d';
7726                 }
7727
7728                 # open patch output
7729                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7730                         '-p', ($format eq 'html' ? "--full-index" : ()),
7731                         $hash_parent_base, $hash_base,
7732                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7733                         or die_error(500, "Open git-diff-tree failed");
7734         }
7735
7736         # old/legacy style URI -- not generated anymore since 1.4.3.
7737         if (!%diffinfo) {
7738                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7739         }
7740
7741         # header
7742         if ($format eq 'html') {
7743                 my $formats_nav =
7744                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7745                                 "raw");
7746                 $formats_nav .= diff_style_nav($diff_style);
7747                 git_header_html(undef, $expires);
7748                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7749                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7750                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7751                 } else {
7752                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7753                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7754                 }
7755                 if (defined $file_name) {
7756                         git_print_page_path($file_name, "blob", $hash_base);
7757                 } else {
7758                         print "<div class=\"page_path\"></div>\n";
7759                 }
7760
7761         } elsif ($format eq 'plain') {
7762                 print $cgi->header(
7763                         -type => 'text/plain',
7764                         -charset => 'utf-8',
7765                         -expires => $expires,
7766                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7767
7768                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7769
7770         } else {
7771                 die_error(400, "Unknown blobdiff format");
7772         }
7773
7774         # patch
7775         if ($format eq 'html') {
7776                 print "<div class=\"page_body\">\n";
7777
7778                 git_patchset_body($fd, $diff_style,
7779                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7780                 close $fd;
7781
7782                 print "</div>\n"; # class="page_body"
7783                 git_footer_html();
7784
7785         } else {
7786                 while (my $line = <$fd>) {
7787                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7788                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7789
7790                         print $line;
7791
7792                         last if $line =~ m!^\+\+\+!;
7793                 }
7794                 local $/ = undef;
7795                 print <$fd>;
7796                 close $fd;
7797         }
7798 }
7799
7800 sub git_blobdiff_plain {
7801         git_blobdiff('plain');
7802 }
7803
7804 # assumes that it is added as later part of already existing navigation,
7805 # so it returns "| foo | bar" rather than just "foo | bar"
7806 sub diff_style_nav {
7807         my ($diff_style, $is_combined) = @_;
7808         $diff_style ||= 'inline';
7809
7810         return "" if ($is_combined);
7811
7812         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7813         my %styles = @styles;
7814         @styles =
7815                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7816
7817         return join '',
7818                 map { " | ".$_ }
7819                 map {
7820                         $_ eq $diff_style ? $styles{$_} :
7821                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7822                 } @styles;
7823 }
7824
7825 sub git_commitdiff {
7826         my %params = @_;
7827         my $format = $params{-format} || 'html';
7828         my $diff_style = $input_params{'diff_style'} || 'inline';
7829
7830         my ($patch_max) = gitweb_get_feature('patches');
7831         if ($format eq 'patch') {
7832                 die_error(403, "Patch view not allowed") unless $patch_max;
7833         }
7834
7835         $hash ||= $hash_base || "HEAD";
7836         my %co = parse_commit($hash)
7837             or die_error(404, "Unknown commit object");
7838
7839         # choose format for commitdiff for merge
7840         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7841                 $hash_parent = '--cc';
7842         }
7843         # we need to prepare $formats_nav before almost any parameter munging
7844         my $formats_nav;
7845         if ($format eq 'html') {
7846                 $formats_nav =
7847                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7848                                 "raw");
7849                 if ($patch_max && @{$co{'parents'}} <= 1) {
7850                         $formats_nav .= " | " .
7851                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7852                                         "patch");
7853                 }
7854                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7855
7856                 if (defined $hash_parent &&
7857                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7858                         # commitdiff with two commits given
7859                         my $hash_parent_short = $hash_parent;
7860                         if ($hash_parent =~ m/^$oid_regex$/) {
7861                                 $hash_parent_short = substr($hash_parent, 0, 7);
7862                         }
7863                         $formats_nav .=
7864                                 ' (from';
7865                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7866                                 if ($co{'parents'}[$i] eq $hash_parent) {
7867                                         $formats_nav .= ' parent ' . ($i+1);
7868                                         last;
7869                                 }
7870                         }
7871                         $formats_nav .= ': ' .
7872                                 $cgi->a({-href => href(-replay=>1,
7873                                                        hash=>$hash_parent, hash_base=>undef)},
7874                                         esc_html($hash_parent_short)) .
7875                                 ')';
7876                 } elsif (!$co{'parent'}) {
7877                         # --root commitdiff
7878                         $formats_nav .= ' (initial)';
7879                 } elsif (scalar @{$co{'parents'}} == 1) {
7880                         # single parent commit
7881                         $formats_nav .=
7882                                 ' (parent: ' .
7883                                 $cgi->a({-href => href(-replay=>1,
7884                                                        hash=>$co{'parent'}, hash_base=>undef)},
7885                                         esc_html(substr($co{'parent'}, 0, 7))) .
7886                                 ')';
7887                 } else {
7888                         # merge commit
7889                         if ($hash_parent eq '--cc') {
7890                                 $formats_nav .= ' | ' .
7891                                         $cgi->a({-href => href(-replay=>1,
7892                                                                hash=>$hash, hash_parent=>'-c')},
7893                                                 'combined');
7894                         } else { # $hash_parent eq '-c'
7895                                 $formats_nav .= ' | ' .
7896                                         $cgi->a({-href => href(-replay=>1,
7897                                                                hash=>$hash, hash_parent=>'--cc')},
7898                                                 'compact');
7899                         }
7900                         $formats_nav .=
7901                                 ' (merge: ' .
7902                                 join(' ', map {
7903                                         $cgi->a({-href => href(-replay=>1,
7904                                                                hash=>$_, hash_base=>undef)},
7905                                                 esc_html(substr($_, 0, 7)));
7906                                 } @{$co{'parents'}} ) .
7907                                 ')';
7908                 }
7909         }
7910
7911         my $hash_parent_param = $hash_parent;
7912         if (!defined $hash_parent_param) {
7913                 # --cc for multiple parents, --root for parentless
7914                 $hash_parent_param =
7915                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7916         }
7917
7918         # read commitdiff
7919         my $fd;
7920         my @difftree;
7921         if ($format eq 'html') {
7922                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7923                         "--no-commit-id", "--patch-with-raw", "--full-index",
7924                         $hash_parent_param, $hash, "--"
7925                         or die_error(500, "Open git-diff-tree failed");
7926
7927                 while (my $line = <$fd>) {
7928                         chomp $line;
7929                         # empty line ends raw part of diff-tree output
7930                         last unless $line;
7931                         push @difftree, scalar parse_difftree_raw_line($line);
7932                 }
7933
7934         } elsif ($format eq 'plain') {
7935                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7936                         '-p', $hash_parent_param, $hash, "--"
7937                         or die_error(500, "Open git-diff-tree failed");
7938         } elsif ($format eq 'patch') {
7939                 # For commit ranges, we limit the output to the number of
7940                 # patches specified in the 'patches' feature.
7941                 # For single commits, we limit the output to a single patch,
7942                 # diverging from the git-format-patch default.
7943                 my @commit_spec = ();
7944                 if ($hash_parent) {
7945                         if ($patch_max > 0) {
7946                                 push @commit_spec, "-$patch_max";
7947                         }
7948                         push @commit_spec, '-n', "$hash_parent..$hash";
7949                 } else {
7950                         if ($params{-single}) {
7951                                 push @commit_spec, '-1';
7952                         } else {
7953                                 if ($patch_max > 0) {
7954                                         push @commit_spec, "-$patch_max";
7955                                 }
7956                                 push @commit_spec, "-n";
7957                         }
7958                         push @commit_spec, '--root', $hash;
7959                 }
7960                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7961                         '--encoding=utf8', '--stdout', @commit_spec
7962                         or die_error(500, "Open git-format-patch failed");
7963         } else {
7964                 die_error(400, "Unknown commitdiff format");
7965         }
7966
7967         # non-textual hash id's can be cached
7968         my $expires;
7969         if ($hash =~ m/^$oid_regex$/) {
7970                 $expires = "+1d";
7971         }
7972
7973         # write commit message
7974         if ($format eq 'html') {
7975                 my $refs = git_get_references();
7976                 my $ref = format_ref_marker($refs, $co{'id'});
7977
7978                 git_header_html(undef, $expires);
7979                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7980                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7981                 print "<div class=\"title_text\">\n" .
7982                       "<table class=\"object_header\">\n";
7983                 git_print_authorship_rows(\%co);
7984                 print "</table>".
7985                       "</div>\n";
7986                 print "<div class=\"page_body\">\n";
7987                 if (@{$co{'comment'}} > 1) {
7988                         print "<div class=\"log\">\n";
7989                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7990                         print "</div>\n"; # class="log"
7991                 }
7992
7993         } elsif ($format eq 'plain') {
7994                 my $refs = git_get_references("tags");
7995                 my $tagname = git_get_rev_name_tags($hash);
7996                 my $filename = basename($project) . "-$hash.patch";
7997
7998                 print $cgi->header(
7999                         -type => 'text/plain',
8000                         -charset => 'utf-8',
8001                         -expires => $expires,
8002                         -content_disposition => 'inline; filename="' . "$filename" . '"');
8003                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
8004                 print "From: " . to_utf8($co{'author'}) . "\n";
8005                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
8006                 print "Subject: " . to_utf8($co{'title'}) . "\n";
8007
8008                 print "X-Git-Tag: $tagname\n" if $tagname;
8009                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
8010
8011                 foreach my $line (@{$co{'comment'}}) {
8012                         print to_utf8($line) . "\n";
8013                 }
8014                 print "---\n\n";
8015         } elsif ($format eq 'patch') {
8016                 my $filename = basename($project) . "-$hash.patch";
8017
8018                 print $cgi->header(
8019                         -type => 'text/plain',
8020                         -charset => 'utf-8',
8021                         -expires => $expires,
8022                         -content_disposition => 'inline; filename="' . "$filename" . '"');
8023         }
8024
8025         # write patch
8026         if ($format eq 'html') {
8027                 my $use_parents = !defined $hash_parent ||
8028                         $hash_parent eq '-c' || $hash_parent eq '--cc';
8029                 git_difftree_body(\@difftree, $hash,
8030                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
8031                 print "<br/>\n";
8032
8033                 git_patchset_body($fd, $diff_style,
8034                                   \@difftree, $hash,
8035                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
8036                 close $fd;
8037                 print "</div>\n"; # class="page_body"
8038                 git_footer_html();
8039
8040         } elsif ($format eq 'plain') {
8041                 local $/ = undef;
8042                 print <$fd>;
8043                 close $fd
8044                         or print "Reading git-diff-tree failed\n";
8045         } elsif ($format eq 'patch') {
8046                 local $/ = undef;
8047                 print <$fd>;
8048                 close $fd
8049                         or print "Reading git-format-patch failed\n";
8050         }
8051 }
8052
8053 sub git_commitdiff_plain {
8054         git_commitdiff(-format => 'plain');
8055 }
8056
8057 # format-patch-style patches
8058 sub git_patch {
8059         git_commitdiff(-format => 'patch', -single => 1);
8060 }
8061
8062 sub git_patches {
8063         git_commitdiff(-format => 'patch');
8064 }
8065
8066 sub git_history {
8067         git_log_generic('history', \&git_history_body,
8068                         $hash_base, $hash_parent_base,
8069                         $file_name, $hash);
8070 }
8071
8072 sub git_search {
8073         $searchtype ||= 'commit';
8074
8075         # check if appropriate features are enabled
8076         gitweb_check_feature('search')
8077                 or die_error(403, "Search is disabled");
8078         if ($searchtype eq 'pickaxe') {
8079                 # pickaxe may take all resources of your box and run for several minutes
8080                 # with every query - so decide by yourself how public you make this feature
8081                 gitweb_check_feature('pickaxe')
8082                         or die_error(403, "Pickaxe search is disabled");
8083         }
8084         if ($searchtype eq 'grep') {
8085                 # grep search might be potentially CPU-intensive, too
8086                 gitweb_check_feature('grep')
8087                         or die_error(403, "Grep search is disabled");
8088         }
8089
8090         if (!defined $searchtext) {
8091                 die_error(400, "Text field is empty");
8092         }
8093         if (!defined $hash) {
8094                 $hash = git_get_head_hash($project);
8095         }
8096         my %co = parse_commit($hash);
8097         if (!%co) {
8098                 die_error(404, "Unknown commit object");
8099         }
8100         if (!defined $page) {
8101                 $page = 0;
8102         }
8103
8104         if ($searchtype eq 'commit' ||
8105             $searchtype eq 'author' ||
8106             $searchtype eq 'committer') {
8107                 git_search_message(%co);
8108         } elsif ($searchtype eq 'pickaxe') {
8109                 git_search_changes(%co);
8110         } elsif ($searchtype eq 'grep') {
8111                 git_search_files(%co);
8112         } else {
8113                 die_error(400, "Unknown search type");
8114         }
8115 }
8116
8117 sub git_search_help {
8118         git_header_html();
8119         git_print_page_nav('','', $hash,$hash,$hash);
8120         print <<EOT;
8121 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
8122 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
8123 the pattern entered is recognized as the POSIX extended
8124 <a href="https://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
8125 insensitive).</p>
8126 <dl>
8127 <dt><b>commit</b></dt>
8128 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
8129 EOT
8130         my $have_grep = gitweb_check_feature('grep');
8131         if ($have_grep) {
8132                 print <<EOT;
8133 <dt><b>grep</b></dt>
8134 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
8135     a different one) are searched for the given pattern. On large trees, this search can take
8136 a while and put some strain on the server, so please use it with some consideration. Note that
8137 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
8138 case-sensitive.</dd>
8139 EOT
8140         }
8141         print <<EOT;
8142 <dt><b>author</b></dt>
8143 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
8144 <dt><b>committer</b></dt>
8145 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
8146 EOT
8147         my $have_pickaxe = gitweb_check_feature('pickaxe');
8148         if ($have_pickaxe) {
8149                 print <<EOT;
8150 <dt><b>pickaxe</b></dt>
8151 <dd>All commits that caused the string to appear or disappear from any file (changes that
8152 added, removed or "modified" the string) will be listed. This search can take a while and
8153 takes a lot of strain on the server, so please use it wisely. Note that since you may be
8154 interested even in changes just changing the case as well, this search is case sensitive.</dd>
8155 EOT
8156         }
8157         print "</dl>\n";
8158         git_footer_html();
8159 }
8160
8161 sub git_shortlog {
8162         git_log_generic('shortlog', \&git_shortlog_body,
8163                         $hash, $hash_parent);
8164 }
8165
8166 ## ......................................................................
8167 ## feeds (RSS, Atom; OPML)
8168
8169 sub git_feed {
8170         my $format = shift || 'atom';
8171         my $have_blame = gitweb_check_feature('blame');
8172
8173         # Atom: http://www.atomenabled.org/developers/syndication/
8174         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8175         if ($format ne 'rss' && $format ne 'atom') {
8176                 die_error(400, "Unknown web feed format");
8177         }
8178
8179         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8180         my $head = $hash || 'HEAD';
8181         my @commitlist = parse_commits($head, 150, 0, $file_name);
8182
8183         my %latest_commit;
8184         my %latest_date;
8185         my $content_type = "application/$format+xml";
8186         if (defined $cgi->http('HTTP_ACCEPT') &&
8187                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8188                 # browser (feed reader) prefers text/xml
8189                 $content_type = 'text/xml';
8190         }
8191         if (defined($commitlist[0])) {
8192                 %latest_commit = %{$commitlist[0]};
8193                 my $latest_epoch = $latest_commit{'committer_epoch'};
8194                 exit_if_unmodified_since($latest_epoch);
8195                 %latest_date = parse_date($latest_epoch, $latest_commit{'committer_tz'});
8196         }
8197         print $cgi->header(
8198                 -type => $content_type,
8199                 -charset => 'utf-8',
8200                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8201                 -status => '200 OK');
8202
8203         # Optimization: skip generating the body if client asks only
8204         # for Last-Modified date.
8205         return if ($cgi->request_method() eq 'HEAD');
8206
8207         # header variables
8208         my $title = "$site_name - $project/$action";
8209         my $feed_type = 'log';
8210         if (defined $hash) {
8211                 $title .= " - '$hash'";
8212                 $feed_type = 'branch log';
8213                 if (defined $file_name) {
8214                         $title .= " :: $file_name";
8215                         $feed_type = 'history';
8216                 }
8217         } elsif (defined $file_name) {
8218                 $title .= " - $file_name";
8219                 $feed_type = 'history';
8220         }
8221         $title .= " $feed_type";
8222         $title = esc_html($title);
8223         my $descr = git_get_project_description($project);
8224         if (defined $descr) {
8225                 $descr = esc_html($descr);
8226         } else {
8227                 $descr = "$project " .
8228                          ($format eq 'rss' ? 'RSS' : 'Atom') .
8229                          " feed";
8230         }
8231         my $owner = git_get_project_owner($project);
8232         $owner = esc_html($owner);
8233
8234         #header
8235         my $alt_url;
8236         if (defined $file_name) {
8237                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8238         } elsif (defined $hash) {
8239                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8240         } else {
8241                 $alt_url = href(-full=>1, action=>"summary");
8242         }
8243         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8244         if ($format eq 'rss') {
8245                 print <<XML;
8246 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8247 <channel>
8248 XML
8249                 print "<title>$title</title>\n" .
8250                       "<link>$alt_url</link>\n" .
8251                       "<description>$descr</description>\n" .
8252                       "<language>en</language>\n" .
8253                       # project owner is responsible for 'editorial' content
8254                       "<managingEditor>$owner</managingEditor>\n";
8255                 if (defined $logo || defined $favicon) {
8256                         # prefer the logo to the favicon, since RSS
8257                         # doesn't allow both
8258                         my $img = esc_url($logo || $favicon);
8259                         print "<image>\n" .
8260                               "<url>$img</url>\n" .
8261                               "<title>$title</title>\n" .
8262                               "<link>$alt_url</link>\n" .
8263                               "</image>\n";
8264                 }
8265                 if (%latest_date) {
8266                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8267                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8268                 }
8269                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8270         } elsif ($format eq 'atom') {
8271                 print <<XML;
8272 <feed xmlns="http://www.w3.org/2005/Atom">
8273 XML
8274                 print "<title>$title</title>\n" .
8275                       "<subtitle>$descr</subtitle>\n" .
8276                       '<link rel="alternate" type="text/html" href="' .
8277                       $alt_url . '" />' . "\n" .
8278                       '<link rel="self" type="' . $content_type . '" href="' .
8279                       $cgi->self_url() . '" />' . "\n" .
8280                       "<id>" . href(-full=>1) . "</id>\n" .
8281                       # use project owner for feed author
8282                       "<author><name>$owner</name></author>\n";
8283                 if (defined $favicon) {
8284                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8285                 }
8286                 if (defined $logo) {
8287                         # not twice as wide as tall: 72 x 27 pixels
8288                         print "<logo>" . esc_url($logo) . "</logo>\n";
8289                 }
8290                 if (! %latest_date) {
8291                         # dummy date to keep the feed valid until commits trickle in:
8292                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8293                 } else {
8294                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8295                 }
8296                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8297         }
8298
8299         # contents
8300         for (my $i = 0; $i <= $#commitlist; $i++) {
8301                 my %co = %{$commitlist[$i]};
8302                 my $commit = $co{'id'};
8303                 # we read 150, we always show 30 and the ones more recent than 48 hours
8304                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8305                         last;
8306                 }
8307                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8308
8309                 # get list of changed files
8310                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8311                         $co{'parent'} || "--root",
8312                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8313                         or next;
8314                 my @difftree = map { chomp; $_ } <$fd>;
8315                 close $fd
8316                         or next;
8317
8318                 # print element (entry, item)
8319                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8320                 if ($format eq 'rss') {
8321                         print "<item>\n" .
8322                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8323                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8324                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8325                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8326                               "<link>$co_url</link>\n" .
8327                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8328                               "<content:encoded>" .
8329                               "<![CDATA[\n";
8330                 } elsif ($format eq 'atom') {
8331                         print "<entry>\n" .
8332                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8333                               "<updated>$cd{'iso-8601'}</updated>\n" .
8334                               "<author>\n" .
8335                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8336                         if ($co{'author_email'}) {
8337                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8338                         }
8339                         print "</author>\n" .
8340                               # use committer for contributor
8341                               "<contributor>\n" .
8342                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8343                         if ($co{'committer_email'}) {
8344                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8345                         }
8346                         print "</contributor>\n" .
8347                               "<published>$cd{'iso-8601'}</published>\n" .
8348                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8349                               "<id>$co_url</id>\n" .
8350                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8351                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8352                 }
8353                 my $comment = $co{'comment'};
8354                 print "<pre>\n";
8355                 foreach my $line (@$comment) {
8356                         $line = esc_html($line);
8357                         print "$line\n";
8358                 }
8359                 print "</pre><ul>\n";
8360                 foreach my $difftree_line (@difftree) {
8361                         my %difftree = parse_difftree_raw_line($difftree_line);
8362                         next if !$difftree{'from_id'};
8363
8364                         my $file = $difftree{'file'} || $difftree{'to_file'};
8365
8366                         print "<li>" .
8367                               "[" .
8368                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8369                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8370                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8371                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8372                                       -title => "diff"}, 'D');
8373                         if ($have_blame) {
8374                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8375                                                              file_name=>$file, hash_base=>$commit),
8376                                               -title => "blame"}, 'B');
8377                         }
8378                         # if this is not a feed of a file history
8379                         if (!defined $file_name || $file_name ne $file) {
8380                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8381                                                              file_name=>$file, hash=>$commit),
8382                                               -title => "history"}, 'H');
8383                         }
8384                         $file = esc_path($file);
8385                         print "] ".
8386                               "$file</li>\n";
8387                 }
8388                 if ($format eq 'rss') {
8389                         print "</ul>]]>\n" .
8390                               "</content:encoded>\n" .
8391                               "</item>\n";
8392                 } elsif ($format eq 'atom') {
8393                         print "</ul>\n</div>\n" .
8394                               "</content>\n" .
8395                               "</entry>\n";
8396                 }
8397         }
8398
8399         # end of feed
8400         if ($format eq 'rss') {
8401                 print "</channel>\n</rss>\n";
8402         } elsif ($format eq 'atom') {
8403                 print "</feed>\n";
8404         }
8405 }
8406
8407 sub git_rss {
8408         git_feed('rss');
8409 }
8410
8411 sub git_atom {
8412         git_feed('atom');
8413 }
8414
8415 sub git_opml {
8416         my @list = git_get_projects_list($project_filter, $strict_export);
8417         if (!@list) {
8418                 die_error(404, "No projects found");
8419         }
8420
8421         print $cgi->header(
8422                 -type => 'text/xml',
8423                 -charset => 'utf-8',
8424                 -content_disposition => 'inline; filename="opml.xml"');
8425
8426         my $title = esc_html($site_name);
8427         my $filter = " within subdirectory ";
8428         if (defined $project_filter) {
8429                 $filter .= esc_html($project_filter);
8430         } else {
8431                 $filter = "";
8432         }
8433         print <<XML;
8434 <?xml version="1.0" encoding="utf-8"?>
8435 <opml version="1.0">
8436 <head>
8437   <title>$title OPML Export$filter</title>
8438 </head>
8439 <body>
8440 <outline text="git RSS feeds">
8441 XML
8442
8443         foreach my $pr (@list) {
8444                 my %proj = %$pr;
8445                 my $head = git_get_head_hash($proj{'path'});
8446                 if (!defined $head) {
8447                         next;
8448                 }
8449                 $git_dir = "$projectroot/$proj{'path'}";
8450                 my %co = parse_commit($head);
8451                 if (!%co) {
8452                         next;
8453                 }
8454
8455                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8456                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8457                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8458                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8459         }
8460         print <<XML;
8461 </outline>
8462 </body>
8463 </opml>
8464 XML
8465 }