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 binmode STDOUT, ':utf8';
  24
  25 if (!defined($CGI::VERSION) || $CGI::VERSION < 4.08) {
  26         eval 'sub CGI::multi_param { CGI::param(@_) }'
  27 }
  28
  29 our $t0 = [ gettimeofday() ];
  30 our $number_of_git_cmds = 0;
  31
  32 BEGIN {
  33         CGI->compile() if $ENV{'MOD_PERL'};
  34 }
  35
  36 our $version = "++GIT_VERSION++";
  37
  38 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  39 sub evaluate_uri {
  40         our $cgi;
  41
  42         our $my_url = $cgi->url();
  43         our $my_uri = $cgi->url(-absolute => 1);
  44
  45         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  46         # needed and used only for URLs with nonempty PATH_INFO
  47         our $base_url = $my_url;
  48
  49         # When the script is used as DirectoryIndex, the URL does not contain the name
  50         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  51         # have to do it ourselves. We make $path_info global because it's also used
  52         # later on.
  53         #
  54         # Another issue with the script being the DirectoryIndex is that the resulting
  55         # $my_url data is not the full script URL: this is good, because we want
  56         # generated links to keep implying the script name if it wasn't explicitly
  57         # indicated in the URL we're handling, but it means that $my_url cannot be used
  58         # as base URL.
  59         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  60         # to build the base URL ourselves:
  61         our $path_info = decode_utf8($ENV{"PATH_INFO"});
  62         if ($path_info) {
  63                 # $path_info has already been URL-decoded by the web server, but
  64                 # $my_url and $my_uri have not. URL-decode them so we can properly
  65                 # strip $path_info.
  66                 $my_url = unescape($my_url);
  67                 $my_uri = unescape($my_uri);
  68                 if ($my_url =~ s,\Q$path_info\E$,, &&
  69                     $my_uri =~ s,\Q$path_info\E$,, &&
  70                     defined $ENV{'SCRIPT_NAME'}) {
  71                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  72                 }
  73         }
  74
  75         # target of the home link on top of all pages
  76         our $home_link = $my_uri || "/";
  77 }
  78
  79 # core git executable to use
  80 # this can just be "git" if your webserver has a sensible PATH
  81 our $GIT = "++GIT_BINDIR++/git";
  82
  83 # absolute fs-path which will be prepended to the project path
  84 #our $projectroot = "/pub/scm";
  85 our $projectroot = "++GITWEB_PROJECTROOT++";
  86
  87 # fs traversing limit for getting project list
  88 # the number is relative to the projectroot
  89 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  90
  91 # string of the home link on top of all pages
  92 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  93
  94 # extra breadcrumbs preceding the home link
  95 our @extra_breadcrumbs = ();
  96
  97 # name of your site or organization to appear in page titles
  98 # replace this with something more descriptive for clearer bookmarks
  99 our $site_name = "++GITWEB_SITENAME++"
 100                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
 101
 102 # html snippet to include in the <head> section of each page
 103 our $site_html_head_string = "++GITWEB_SITE_HTML_HEAD_STRING++";
 104 # filename of html text to include at top of each page
 105 our $site_header = "++GITWEB_SITE_HEADER++";
 106 # html text to include at home page
 107 our $home_text = "++GITWEB_HOMETEXT++";
 108 # filename of html text to include at bottom of each page
 109 our $site_footer = "++GITWEB_SITE_FOOTER++";
 110
 111 # URI of stylesheets
 112 our @stylesheets = ("++GITWEB_CSS++");
 113 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
 114 our $stylesheet = undef;
 115
 116 # URI of GIT logo (72x27 size)
 117 our $logo = "++GITWEB_LOGO++";
 118 # URI of GIT favicon, assumed to be image/png type
 119 our $favicon = "++GITWEB_FAVICON++";
 120 # URI of gitweb.js (JavaScript code for gitweb)
 121 our $javascript = "++GITWEB_JS++";
 122
 123 # URI and label (title) of GIT logo link
 124 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 125 #our $logo_label = "git documentation";
 126 our $logo_url = "http://git-scm.com/";
 127 our $logo_label = "git homepage";
 128
 129 # source of projects list
 130 our $projects_list = "++GITWEB_LIST++";
 131
 132 # the width (in characters) of the projects list "Description" column
 133 our $projects_list_description_width = 25;
 134
 135 # group projects by category on the projects list
 136 # (enabled if this variable evaluates to true)
 137 our $projects_list_group_categories = 0;
 138
 139 # default category if none specified
 140 # (leave the empty string for no category)
 141 our $project_list_default_category = "";
 142
 143 # default order of projects list
 144 # valid values are none, project, descr, owner, and age
 145 our $default_projects_order = "project";
 146
 147 # show repository only if this file exists
 148 # (only effective if this variable evaluates to true)
 149 our $export_ok = "++GITWEB_EXPORT_OK++";
 150
 151 # don't generate age column on the projects list page
 152 our $omit_age_column = 0;
 153
 154 # don't generate information about owners of repositories
 155 our $omit_owner=0;
 156
 157 # show repository only if this subroutine returns true
 158 # when given the path to the project, for example:
 159 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 160 our $export_auth_hook = undef;
 161
 162 # only allow viewing of repositories also shown on the overview page
 163 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 164
 165 # list of git base URLs used for URL to where fetch project from,
 166 # i.e. full URL is "$git_base_url/$project"
 167 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 168
 169 # default blob_plain mimetype and default charset for text/plain blob
 170 our $default_blob_plain_mimetype = 'text/plain';
 171 our $default_text_plain_charset  = undef;
 172
 173 # file to use for guessing MIME types before trying /etc/mime.types
 174 # (relative to the current git repository)
 175 our $mimetypes_file = undef;
 176
 177 # assume this charset if line contains non-UTF-8 characters;
 178 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 179 # for which encoding all byte sequences are valid, for example
 180 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 181 # could be even 'utf-8' for the old behavior)
 182 our $fallback_encoding = 'latin1';
 183
 184 # rename detection options for git-diff and git-diff-tree
 185 # - default is '-M', with the cost proportional to
 186 #   (number of removed files) * (number of new files).
 187 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 188 #   (number of changed files + number of removed files) * (number of new files)
 189 # - even more costly is '-C', '--find-copies-harder' with cost
 190 #   (number of files in the original tree) * (number of new files)
 191 # - one might want to include '-B' option, e.g. '-B', '-M'
 192 our @diff_opts = ('-M'); # taken from git_commit
 193
 194 # Disables features that would allow repository owners to inject script into
 195 # the gitweb domain.
 196 our $prevent_xss = 0;
 197
 198 # Path to the highlight executable to use (must be the one from
 199 # http://www.andre-simon.de due to assumptions about parameters and output).
 200 # Useful if highlight is not installed on your webserver's PATH.
 201 # [Default: highlight]
 202 our $highlight_bin = "++HIGHLIGHT_BIN++";
 203
 204 # information about snapshot formats that gitweb is capable of serving
 205 our %known_snapshot_formats = (
 206         # name => {
 207         #       'display' => display name,
 208         #       'type' => mime type,
 209         #       'suffix' => filename suffix,
 210         #       'format' => --format for git-archive,
 211         #       'compressor' => [compressor command and arguments]
 212         #                       (array reference, optional)
 213         #       'disabled' => boolean (optional)}
 214         #
 215         'tgz' => {
 216                 'display' => 'tar.gz',
 217                 'type' => 'application/x-gzip',
 218                 'suffix' => '.tar.gz',
 219                 'format' => 'tar',
 220                 'compressor' => ['gzip', '-n']},
 221
 222         'tbz2' => {
 223                 'display' => 'tar.bz2',
 224                 'type' => 'application/x-bzip2',
 225                 'suffix' => '.tar.bz2',
 226                 'format' => 'tar',
 227                 'compressor' => ['bzip2']},
 228
 229         'txz' => {
 230                 'display' => 'tar.xz',
 231                 'type' => 'application/x-xz',
 232                 'suffix' => '.tar.xz',
 233                 'format' => 'tar',
 234                 'compressor' => ['xz'],
 235                 'disabled' => 1},
 236
 237         'zip' => {
 238                 'display' => 'zip',
 239                 'type' => 'application/x-zip',
 240                 'suffix' => '.zip',
 241                 'format' => 'zip'},
 242 );
 243
 244 # Aliases so we understand old gitweb.snapshot values in repository
 245 # configuration.
 246 our %known_snapshot_format_aliases = (
 247         'gzip'  => 'tgz',
 248         'bzip2' => 'tbz2',
 249         'xz'    => 'txz',
 250
 251         # backward compatibility: legacy gitweb config support
 252         'x-gzip' => undef, 'gz' => undef,
 253         'x-bzip2' => undef, 'bz2' => undef,
 254         'x-zip' => undef, '' => undef,
 255 );
 256
 257 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 258 # are changed, it may be appropriate to change these values too via
 259 # $GITWEB_CONFIG.
 260 our %avatar_size = (
 261         'default' => 16,
 262         'double'  => 32
 263 );
 264
 265 # Used to set the maximum load that we will still respond to gitweb queries.
 266 # If server load exceed this value then return "503 server busy" error.
 267 # If gitweb cannot determined server load, it is taken to be 0.
 268 # Leave it undefined (or set to 'undef') to turn off load checking.
 269 our $maxload = 300;
 270
 271 # configuration for 'highlight' (http://www.andre-simon.de/)
 272 # match by basename
 273 our %highlight_basename = (
 274         #'Program' => 'py',
 275         #'Library' => 'py',
 276         'SConstruct' => 'py', # SCons equivalent of Makefile
 277         'Makefile' => 'make',
 278 );
 279 # match by extension
 280 our %highlight_ext = (
 281         # main extensions, defining name of syntax;
 282         # see files in /usr/share/highlight/langDefs/ directory
 283         (map { $_ => $_ } qw(py rb java css js tex bib xml awk bat ini spec tcl sql)),
 284         # alternate extensions, see /etc/highlight/filetypes.conf
 285         (map { $_ => 'c'   } qw(c h)),
 286         (map { $_ => 'sh'  } qw(sh bash zsh ksh)),
 287         (map { $_ => 'cpp' } qw(cpp cxx c++ cc)),
 288         (map { $_ => 'php' } qw(php php3 php4 php5 phps)),
 289         (map { $_ => 'pl'  } qw(pl perl pm)), # perhaps also 'cgi'
 290         (map { $_ => 'make'} qw(make mak mk)),
 291         (map { $_ => 'xml' } qw(xml xhtml html htm)),
 292 );
 293
 294 # You define site-wide feature defaults here; override them with
 295 # $GITWEB_CONFIG as necessary.
 296 our %feature = (
 297         # feature => {
 298         #       'sub' => feature-sub (subroutine),
 299         #       'override' => allow-override (boolean),
 300         #       'default' => [ default options...] (array reference)}
 301         #
 302         # if feature is overridable (it means that allow-override has true value),
 303         # then feature-sub will be called with default options as parameters;
 304         # return value of feature-sub indicates if to enable specified feature
 305         #
 306         # if there is no 'sub' key (no feature-sub), then feature cannot be
 307         # overridden
 308         #
 309         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 310         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 311         # is enabled
 312
 313         # Enable the 'blame' blob view, showing the last commit that modified
 314         # each line in the file. This can be very CPU-intensive.
 315
 316         # To enable system wide have in $GITWEB_CONFIG
 317         # $feature{'blame'}{'default'} = [1];
 318         # To have project specific config enable override in $GITWEB_CONFIG
 319         # $feature{'blame'}{'override'} = 1;
 320         # and in project config gitweb.blame = 0|1;
 321         'blame' => {
 322                 'sub' => sub { feature_bool('blame', @_) },
 323                 'override' => 0,
 324                 'default' => [0]},
 325
 326         # Enable the 'snapshot' link, providing a compressed archive of any
 327         # tree. This can potentially generate high traffic if you have large
 328         # project.
 329
 330         # Value is a list of formats defined in %known_snapshot_formats that
 331         # you wish to offer.
 332         # To disable system wide have in $GITWEB_CONFIG
 333         # $feature{'snapshot'}{'default'} = [];
 334         # To have project specific config enable override in $GITWEB_CONFIG
 335         # $feature{'snapshot'}{'override'} = 1;
 336         # and in project config, a comma-separated list of formats or "none"
 337         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 338         'snapshot' => {
 339                 'sub' => \&feature_snapshot,
 340                 'override' => 0,
 341                 'default' => ['tgz']},
 342
 343         # Enable text search, which will list the commits which match author,
 344         # committer or commit text to a given string.  Enabled by default.
 345         # Project specific override is not supported.
 346         #
 347         # Note that this controls all search features, which means that if
 348         # it is disabled, then 'grep' and 'pickaxe' search would also be
 349         # disabled.
 350         'search' => {
 351                 'override' => 0,
 352                 'default' => [1]},
 353
 354         # Enable grep search, which will list the files in currently selected
 355         # tree containing the given string. Enabled by default. This can be
 356         # potentially CPU-intensive, of course.
 357         # Note that you need to have 'search' feature enabled too.
 358
 359         # To enable system wide have in $GITWEB_CONFIG
 360         # $feature{'grep'}{'default'} = [1];
 361         # To have project specific config enable override in $GITWEB_CONFIG
 362         # $feature{'grep'}{'override'} = 1;
 363         # and in project config gitweb.grep = 0|1;
 364         'grep' => {
 365                 'sub' => sub { feature_bool('grep', @_) },
 366                 'override' => 0,
 367                 'default' => [1]},
 368
 369         # Enable the pickaxe search, which will list the commits that modified
 370         # a given string in a file. This can be practical and quite faster
 371         # alternative to 'blame', but still potentially CPU-intensive.
 372         # Note that you need to have 'search' feature enabled too.
 373
 374         # To enable system wide have in $GITWEB_CONFIG
 375         # $feature{'pickaxe'}{'default'} = [1];
 376         # To have project specific config enable override in $GITWEB_CONFIG
 377         # $feature{'pickaxe'}{'override'} = 1;
 378         # and in project config gitweb.pickaxe = 0|1;
 379         'pickaxe' => {
 380                 'sub' => sub { feature_bool('pickaxe', @_) },
 381                 'override' => 0,
 382                 'default' => [1]},
 383
 384         # Enable showing size of blobs in a 'tree' view, in a separate
 385         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 386
 387         # To disable system wide have in $GITWEB_CONFIG
 388         # $feature{'show-sizes'}{'default'} = [0];
 389         # To have project specific config enable override in $GITWEB_CONFIG
 390         # $feature{'show-sizes'}{'override'} = 1;
 391         # and in project config gitweb.showsizes = 0|1;
 392         'show-sizes' => {
 393                 'sub' => sub { feature_bool('showsizes', @_) },
 394                 'override' => 0,
 395                 'default' => [1]},
 396
 397         # Make gitweb use an alternative format of the URLs which can be
 398         # more readable and natural-looking: project name is embedded
 399         # directly in the path and the query string contains other
 400         # auxiliary information. All gitweb installations recognize
 401         # URL in either format; this configures in which formats gitweb
 402         # generates links.
 403
 404         # To enable system wide have in $GITWEB_CONFIG
 405         # $feature{'pathinfo'}{'default'} = [1];
 406         # Project specific override is not supported.
 407
 408         # Note that you will need to change the default location of CSS,
 409         # favicon, logo and possibly other files to an absolute URL. Also,
 410         # if gitweb.cgi serves as your indexfile, you will need to force
 411         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 412         'pathinfo' => {
 413                 'override' => 0,
 414                 'default' => [0]},
 415
 416         # Make gitweb consider projects in project root subdirectories
 417         # to be forks of existing projects. Given project $projname.git,
 418         # projects matching $projname/*.git will not be shown in the main
 419         # projects list, instead a '+' mark will be added to $projname
 420         # there and a 'forks' view will be enabled for the project, listing
 421         # all the forks. If project list is taken from a file, forks have
 422         # to be listed after the main project.
 423
 424         # To enable system wide have in $GITWEB_CONFIG
 425         # $feature{'forks'}{'default'} = [1];
 426         # Project specific override is not supported.
 427         'forks' => {
 428                 'override' => 0,
 429                 'default' => [0]},
 430
 431         # Insert custom links to the action bar of all project pages.
 432         # This enables you mainly to link to third-party scripts integrating
 433         # into gitweb; e.g. git-browser for graphical history representation
 434         # or custom web-based repository administration interface.
 435
 436         # The 'default' value consists of a list of triplets in the form
 437         # (label, link, position) where position is the label after which
 438         # to insert the link and link is a format string where %n expands
 439         # to the project name, %f to the project path within the filesystem,
 440         # %h to the current hash (h gitweb parameter) and %b to the current
 441         # hash base (hb gitweb parameter); %% expands to %.
 442
 443         # To enable system wide have in $GITWEB_CONFIG e.g.
 444         # $feature{'actions'}{'default'} = [('graphiclog',
 445         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 446         # Project specific override is not supported.
 447         'actions' => {
 448                 'override' => 0,
 449                 'default' => []},
 450
 451         # Allow gitweb scan project content tags of project repository,
 452         # and display the popular Web 2.0-ish "tag cloud" near the projects
 453         # list.  Note that this is something COMPLETELY different from the
 454         # normal Git tags.
 455
 456         # gitweb by itself can show existing tags, but it does not handle
 457         # tagging itself; you need to do it externally, outside gitweb.
 458         # The format is described in git_get_project_ctags() subroutine.
 459         # You may want to install the HTML::TagCloud Perl module to get
 460         # a pretty tag cloud instead of just a list of tags.
 461
 462         # To enable system wide have in $GITWEB_CONFIG
 463         # $feature{'ctags'}{'default'} = [1];
 464         # Project specific override is not supported.
 465
 466         # In the future whether ctags editing is enabled might depend
 467         # on the value, but using 1 should always mean no editing of ctags.
 468         'ctags' => {
 469                 'override' => 0,
 470                 'default' => [0]},
 471
 472         # The maximum number of patches in a patchset generated in patch
 473         # view. Set this to 0 or undef to disable patch view, or to a
 474         # negative number to remove any limit.
 475
 476         # To disable system wide have in $GITWEB_CONFIG
 477         # $feature{'patches'}{'default'} = [0];
 478         # To have project specific config enable override in $GITWEB_CONFIG
 479         # $feature{'patches'}{'override'} = 1;
 480         # and in project config gitweb.patches = 0|n;
 481         # where n is the maximum number of patches allowed in a patchset.
 482         'patches' => {
 483                 'sub' => \&feature_patches,
 484                 'override' => 0,
 485                 'default' => [16]},
 486
 487         # Avatar support. When this feature is enabled, views such as
 488         # shortlog or commit will display an avatar associated with
 489         # the email of the committer(s) and/or author(s).
 490
 491         # Currently available providers are gravatar and picon.
 492         # If an unknown provider is specified, the feature is disabled.
 493
 494         # Gravatar depends on Digest::MD5.
 495         # Picon currently relies on the indiana.edu database.
 496
 497         # To enable system wide have in $GITWEB_CONFIG
 498         # $feature{'avatar'}{'default'} = ['<provider>'];
 499         # where <provider> is either gravatar or picon.
 500         # To have project specific config enable override in $GITWEB_CONFIG
 501         # $feature{'avatar'}{'override'} = 1;
 502         # and in project config gitweb.avatar = <provider>;
 503         'avatar' => {
 504                 'sub' => \&feature_avatar,
 505                 'override' => 0,
 506                 'default' => ['']},
 507
 508         # Enable displaying how much time and how many git commands
 509         # it took to generate and display page.  Disabled by default.
 510         # Project specific override is not supported.
 511         'timed' => {
 512                 'override' => 0,
 513                 'default' => [0]},
 514
 515         # Enable turning some links into links to actions which require
 516         # JavaScript to run (like 'blame_incremental').  Not enabled by
 517         # default.  Project specific override is currently not supported.
 518         'javascript-actions' => {
 519                 'override' => 0,
 520                 'default' => [0]},
 521
 522         # Enable and configure ability to change common timezone for dates
 523         # in gitweb output via JavaScript.  Enabled by default.
 524         # Project specific override is not supported.
 525         'javascript-timezone' => {
 526                 'override' => 0,
 527                 'default' => [
 528                         'local',     # default timezone: 'utc', 'local', or '(-|+)HHMM' format,
 529                                      # or undef to turn off this feature
 530                         'gitweb_tz', # name of cookie where to store selected timezone
 531                         'datetime',  # CSS class used to mark up dates for manipulation
 532                 ]},
 533
 534         # Syntax highlighting support. This is based on Daniel Svensson's
 535         # and Sham Chukoury's work in gitweb-xmms2.git.
 536         # It requires the 'highlight' program present in $PATH,
 537         # and therefore is disabled by default.
 538
 539         # To enable system wide have in $GITWEB_CONFIG
 540         # $feature{'highlight'}{'default'} = [1];
 541
 542         'highlight' => {
 543                 'sub' => sub { feature_bool('highlight', @_) },
 544                 'override' => 0,
 545                 'default' => [0]},
 546
 547         # Enable displaying of remote heads in the heads list
 548
 549         # To enable system wide have in $GITWEB_CONFIG
 550         # $feature{'remote_heads'}{'default'} = [1];
 551         # To have project specific config enable override in $GITWEB_CONFIG
 552         # $feature{'remote_heads'}{'override'} = 1;
 553         # and in project config gitweb.remoteheads = 0|1;
 554         'remote_heads' => {
 555                 'sub' => sub { feature_bool('remote_heads', @_) },
 556                 'override' => 0,
 557                 'default' => [0]},
 558
 559         # Enable showing branches under other refs in addition to heads
 560
 561         # To set system wide extra branch refs have in $GITWEB_CONFIG
 562         # $feature{'extra-branch-refs'}{'default'} = ['dirs', 'of', 'choice'];
 563         # To have project specific config enable override in $GITWEB_CONFIG
 564         # $feature{'extra-branch-refs'}{'override'} = 1;
 565         # and in project config gitweb.extrabranchrefs = dirs of choice
 566         # Every directory is separated with whitespace.
 567
 568         'extra-branch-refs' => {
 569                 'sub' => \&feature_extra_branch_refs,
 570                 'override' => 0,
 571                 'default' => []},
 572 );
 573
 574 sub gitweb_get_feature {
 575         my ($name) = @_;
 576         return unless exists $feature{$name};
 577         my ($sub, $override, @defaults) = (
 578                 $feature{$name}{'sub'},
 579                 $feature{$name}{'override'},
 580                 @{$feature{$name}{'default'}});
 581         # project specific override is possible only if we have project
 582         our $git_dir; # global variable, declared later
 583         if (!$override || !defined $git_dir) {
 584                 return @defaults;
 585         }
 586         if (!defined $sub) {
 587                 warn "feature $name is not overridable";
 588                 return @defaults;
 589         }
 590         return $sub->(@defaults);
 591 }
 592
 593 # A wrapper to check if a given feature is enabled.
 594 # With this, you can say
 595 #
 596 #   my $bool_feat = gitweb_check_feature('bool_feat');
 597 #   gitweb_check_feature('bool_feat') or somecode;
 598 #
 599 # instead of
 600 #
 601 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 602 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 603 #
 604 sub gitweb_check_feature {
 605         return (gitweb_get_feature(@_))[0];
 606 }
 607
 608
 609 sub feature_bool {
 610         my $key = shift;
 611         my ($val) = git_get_project_config($key, '--bool');
 612
 613         if (!defined $val) {
 614                 return ($_[0]);
 615         } elsif ($val eq 'true') {
 616                 return (1);
 617         } elsif ($val eq 'false') {
 618                 return (0);
 619         }
 620 }
 621
 622 sub feature_snapshot {
 623         my (@fmts) = @_;
 624
 625         my ($val) = git_get_project_config('snapshot');
 626
 627         if ($val) {
 628                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 629         }
 630
 631         return @fmts;
 632 }
 633
 634 sub feature_patches {
 635         my @val = (git_get_project_config('patches', '--int'));
 636
 637         if (@val) {
 638                 return @val;
 639         }
 640
 641         return ($_[0]);
 642 }
 643
 644 sub feature_avatar {
 645         my @val = (git_get_project_config('avatar'));
 646
 647         return @val ? @val : @_;
 648 }
 649
 650 sub feature_extra_branch_refs {
 651         my (@branch_refs) = @_;
 652         my $values = git_get_project_config('extrabranchrefs');
 653
 654         if ($values) {
 655                 $values = config_to_multi ($values);
 656                 @branch_refs = ();
 657                 foreach my $value (@{$values}) {
 658                         push @branch_refs, split /\s+/, $value;
 659                 }
 660         }
 661
 662         return @branch_refs;
 663 }
 664
 665 # checking HEAD file with -e is fragile if the repository was
 666 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 667 # and then pruned.
 668 sub check_head_link {
 669         my ($dir) = @_;
 670         my $headfile = "$dir/HEAD";
 671         return ((-e $headfile) ||
 672                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 673 }
 674
 675 sub check_export_ok {
 676         my ($dir) = @_;
 677         return (check_head_link($dir) &&
 678                 (!$export_ok || -e "$dir/$export_ok") &&
 679                 (!$export_auth_hook || $export_auth_hook->($dir)));
 680 }
 681
 682 # process alternate names for backward compatibility
 683 # filter out unsupported (unknown) snapshot formats
 684 sub filter_snapshot_fmts {
 685         my @fmts = @_;
 686
 687         @fmts = map {
 688                 exists $known_snapshot_format_aliases{$_} ?
 689                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 690         @fmts = grep {
 691                 exists $known_snapshot_formats{$_} &&
 692                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 693 }
 694
 695 sub filter_and_validate_refs {
 696         my @refs = @_;
 697         my %unique_refs = ();
 698
 699         foreach my $ref (@refs) {
 700                 die_error(500, "Invalid ref '$ref' in 'extra-branch-refs' feature") unless (is_valid_ref_format($ref));
 701                 # 'heads' are added implicitly in get_branch_refs().
 702                 $unique_refs{$ref} = 1 if ($ref ne 'heads');
 703         }
 704         return sort keys %unique_refs;
 705 }
 706
 707 # If it is set to code reference, it is code that it is to be run once per
 708 # request, allowing updating configurations that change with each request,
 709 # while running other code in config file only once.
 710 #
 711 # Otherwise, if it is false then gitweb would process config file only once;
 712 # if it is true then gitweb config would be run for each request.
 713 our $per_request_config = 1;
 714
 715 # read and parse gitweb config file given by its parameter.
 716 # returns true on success, false on recoverable error, allowing
 717 # to chain this subroutine, using first file that exists.
 718 # dies on errors during parsing config file, as it is unrecoverable.
 719 sub read_config_file {
 720         my $filename = shift;
 721         return unless defined $filename;
 722         # die if there are errors parsing config file
 723         if (-e $filename) {
 724                 do $filename;
 725                 die $@ if $@;
 726                 return 1;
 727         }
 728         return;
 729 }
 730
 731 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM, $GITWEB_CONFIG_COMMON);
 732 sub evaluate_gitweb_config {
 733         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 734         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 735         our $GITWEB_CONFIG_COMMON = $ENV{'GITWEB_CONFIG_COMMON'} || "++GITWEB_CONFIG_COMMON++";
 736
 737         # Protect against duplications of file names, to not read config twice.
 738         # Only one of $GITWEB_CONFIG and $GITWEB_CONFIG_SYSTEM is used, so
 739         # there possibility of duplication of filename there doesn't matter.
 740         $GITWEB_CONFIG = ""        if ($GITWEB_CONFIG eq $GITWEB_CONFIG_COMMON);
 741         $GITWEB_CONFIG_SYSTEM = "" if ($GITWEB_CONFIG_SYSTEM eq $GITWEB_CONFIG_COMMON);
 742
 743         # Common system-wide settings for convenience.
 744         # Those settings can be ovverriden by GITWEB_CONFIG or GITWEB_CONFIG_SYSTEM.
 745         read_config_file($GITWEB_CONFIG_COMMON);
 746
 747         # Use first config file that exists.  This means use the per-instance
 748         # GITWEB_CONFIG if exists, otherwise use GITWEB_SYSTEM_CONFIG.
 749         read_config_file($GITWEB_CONFIG) and return;
 750         read_config_file($GITWEB_CONFIG_SYSTEM);
 751 }
 752
 753 # Get loadavg of system, to compare against $maxload.
 754 # Currently it requires '/proc/loadavg' present to get loadavg;
 755 # if it is not present it returns 0, which means no load checking.
 756 sub get_loadavg {
 757         if( -e '/proc/loadavg' ){
 758                 open my $fd, '<', '/proc/loadavg'
 759                         or return 0;
 760                 my @load = split(/\s+/, scalar <$fd>);
 761                 close $fd;
 762
 763                 # The first three columns measure CPU and IO utilization of the last one,
 764                 # five, and 10 minute periods.  The fourth column shows the number of
 765                 # currently running processes and the total number of processes in the m/n
 766                 # format.  The last column displays the last process ID used.
 767                 return $load[0] || 0;
 768         }
 769         # additional checks for load average should go here for things that don't export
 770         # /proc/loadavg
 771
 772         return 0;
 773 }
 774
 775 # version of the core git binary
 776 our $git_version;
 777 sub evaluate_git_version {
 778         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 779         $number_of_git_cmds++;
 780 }
 781
 782 sub check_loadavg {
 783         if (defined $maxload && get_loadavg() > $maxload) {
 784                 die_error(503, "The load average on the server is too high");
 785         }
 786 }
 787
 788 # ======================================================================
 789 # input validation and dispatch
 790
 791 # input parameters can be collected from a variety of sources (presently, CGI
 792 # and PATH_INFO), so we define an %input_params hash that collects them all
 793 # together during validation: this allows subsequent uses (e.g. href()) to be
 794 # agnostic of the parameter origin
 795
 796 our %input_params = ();
 797
 798 # input parameters are stored with the long parameter name as key. This will
 799 # also be used in the href subroutine to convert parameters to their CGI
 800 # equivalent, and since the href() usage is the most frequent one, we store
 801 # the name -> CGI key mapping here, instead of the reverse.
 802 #
 803 # XXX: Warning: If you touch this, check the search form for updating,
 804 # too.
 805
 806 our @cgi_param_mapping = (
 807         project => "p",
 808         action => "a",
 809         file_name => "f",
 810         file_parent => "fp",
 811         hash => "h",
 812         hash_parent => "hp",
 813         hash_base => "hb",
 814         hash_parent_base => "hpb",
 815         page => "pg",
 816         order => "o",
 817         searchtext => "s",
 818         searchtype => "st",
 819         snapshot_format => "sf",
 820         extra_options => "opt",
 821         search_use_regexp => "sr",
 822         ctag => "by_tag",
 823         diff_style => "ds",
 824         project_filter => "pf",
 825         # this must be last entry (for manipulation from JavaScript)
 826         javascript => "js"
 827 );
 828 our %cgi_param_mapping = @cgi_param_mapping;
 829
 830 # we will also need to know the possible actions, for validation
 831 our %actions = (
 832         "blame" => \&git_blame,
 833         "blame_incremental" => \&git_blame_incremental,
 834         "blame_data" => \&git_blame_data,
 835         "blobdiff" => \&git_blobdiff,
 836         "blobdiff_plain" => \&git_blobdiff_plain,
 837         "blob" => \&git_blob,
 838         "blob_plain" => \&git_blob_plain,
 839         "commitdiff" => \&git_commitdiff,
 840         "commitdiff_plain" => \&git_commitdiff_plain,
 841         "commit" => \&git_commit,
 842         "forks" => \&git_forks,
 843         "heads" => \&git_heads,
 844         "history" => \&git_history,
 845         "log" => \&git_log,
 846         "patch" => \&git_patch,
 847         "patches" => \&git_patches,
 848         "remotes" => \&git_remotes,
 849         "rss" => \&git_rss,
 850         "atom" => \&git_atom,
 851         "search" => \&git_search,
 852         "search_help" => \&git_search_help,
 853         "shortlog" => \&git_shortlog,
 854         "summary" => \&git_summary,
 855         "tag" => \&git_tag,
 856         "tags" => \&git_tags,
 857         "tree" => \&git_tree,
 858         "snapshot" => \&git_snapshot,
 859         "object" => \&git_object,
 860         # those below don't need $project
 861         "opml" => \&git_opml,
 862         "project_list" => \&git_project_list,
 863         "project_index" => \&git_project_index,
 864 );
 865
 866 # finally, we have the hash of allowed extra_options for the commands that
 867 # allow them
 868 our %allowed_options = (
 869         "--no-merges" => [ qw(rss atom log shortlog history) ],
 870 );
 871
 872 # fill %input_params with the CGI parameters. All values except for 'opt'
 873 # should be single values, but opt can be an array. We should probably
 874 # build an array of parameters that can be multi-valued, but since for the time
 875 # being it's only this one, we just single it out
 876 sub evaluate_query_params {
 877         our $cgi;
 878
 879         while (my ($name, $symbol) = each %cgi_param_mapping) {
 880                 if ($symbol eq 'opt') {
 881                         $input_params{$name} = [ map { decode_utf8($_) } $cgi->multi_param($symbol) ];
 882                 } else {
 883                         $input_params{$name} = decode_utf8($cgi->param($symbol));
 884                 }
 885         }
 886 }
 887
 888 # now read PATH_INFO and update the parameter list for missing parameters
 889 sub evaluate_path_info {
 890         return if defined $input_params{'project'};
 891         return if !$path_info;
 892         $path_info =~ s,^/+,,;
 893         return if !$path_info;
 894
 895         # find which part of PATH_INFO is project
 896         my $project = $path_info;
 897         $project =~ s,/+$,,;
 898         while ($project && !check_head_link("$projectroot/$project")) {
 899                 $project =~ s,/*[^/]*$,,;
 900         }
 901         return unless $project;
 902         $input_params{'project'} = $project;
 903
 904         # do not change any parameters if an action is given using the query string
 905         return if $input_params{'action'};
 906         $path_info =~ s,^\Q$project\E/*,,;
 907
 908         # next, check if we have an action
 909         my $action = $path_info;
 910         $action =~ s,/.*$,,;
 911         if (exists $actions{$action}) {
 912                 $path_info =~ s,^$action/*,,;
 913                 $input_params{'action'} = $action;
 914         }
 915
 916         # list of actions that want hash_base instead of hash, but can have no
 917         # pathname (f) parameter
 918         my @wants_base = (
 919                 'tree',
 920                 'history',
 921         );
 922
 923         # we want to catch, among others
 924         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 925         my ($parentrefname, $parentpathname, $refname, $pathname) =
 926                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?([^:]+?)?(?::(.+))?$/);
 927
 928         # first, analyze the 'current' part
 929         if (defined $pathname) {
 930                 # we got "branch:filename" or "branch:dir/"
 931                 # we could use git_get_type(branch:pathname), but:
 932                 # - it needs $git_dir
 933                 # - it does a git() call
 934                 # - the convention of terminating directories with a slash
 935                 #   makes it superfluous
 936                 # - embedding the action in the PATH_INFO would make it even
 937                 #   more superfluous
 938                 $pathname =~ s,^/+,,;
 939                 if (!$pathname || substr($pathname, -1) eq "/") {
 940                         $input_params{'action'} ||= "tree";
 941                         $pathname =~ s,/$,,;
 942                 } else {
 943                         # the default action depends on whether we had parent info
 944                         # or not
 945                         if ($parentrefname) {
 946                                 $input_params{'action'} ||= "blobdiff_plain";
 947                         } else {
 948                                 $input_params{'action'} ||= "blob_plain";
 949                         }
 950                 }
 951                 $input_params{'hash_base'} ||= $refname;
 952                 $input_params{'file_name'} ||= $pathname;
 953         } elsif (defined $refname) {
 954                 # we got "branch". In this case we have to choose if we have to
 955                 # set hash or hash_base.
 956                 #
 957                 # Most of the actions without a pathname only want hash to be
 958                 # set, except for the ones specified in @wants_base that want
 959                 # hash_base instead. It should also be noted that hand-crafted
 960                 # links having 'history' as an action and no pathname or hash
 961                 # set will fail, but that happens regardless of PATH_INFO.
 962                 if (defined $parentrefname) {
 963                         # if there is parent let the default be 'shortlog' action
 964                         # (for http://git.example.com/repo.git/A..B links); if there
 965                         # is no parent, dispatch will detect type of object and set
 966                         # action appropriately if required (if action is not set)
 967                         $input_params{'action'} ||= "shortlog";
 968                 }
 969                 if ($input_params{'action'} &&
 970                     grep { $_ eq $input_params{'action'} } @wants_base) {
 971                         $input_params{'hash_base'} ||= $refname;
 972                 } else {
 973                         $input_params{'hash'} ||= $refname;
 974                 }
 975         }
 976
 977         # next, handle the 'parent' part, if present
 978         if (defined $parentrefname) {
 979                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 980                 # someproject/blobdiff/oldrev..newrev:/filename
 981                 if ($parentpathname) {
 982                         $parentpathname =~ s,^/+,,;
 983                         $parentpathname =~ s,/$,,;
 984                         $input_params{'file_parent'} ||= $parentpathname;
 985                 } else {
 986                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 987                 }
 988                 # we assume that hash_parent_base is wanted if a path was specified,
 989                 # or if the action wants hash_base instead of hash
 990                 if (defined $input_params{'file_parent'} ||
 991                         grep { $_ eq $input_params{'action'} } @wants_base) {
 992                         $input_params{'hash_parent_base'} ||= $parentrefname;
 993                 } else {
 994                         $input_params{'hash_parent'} ||= $parentrefname;
 995                 }
 996         }
 997
 998         # for the snapshot action, we allow URLs in the form
 999         # $project/snapshot/$hash.ext
1000         # where .ext determines the snapshot and gets removed from the
1001         # passed $refname to provide the $hash.
1002         #
1003         # To be able to tell that $refname includes the format extension, we
1004         # require the following two conditions to be satisfied:
1005         # - the hash input parameter MUST have been set from the $refname part
1006         #   of the URL (i.e. they must be equal)
1007         # - the snapshot format MUST NOT have been defined already (e.g. from
1008         #   CGI parameter sf)
1009         # It's also useless to try any matching unless $refname has a dot,
1010         # so we check for that too
1011         if (defined $input_params{'action'} &&
1012                 $input_params{'action'} eq 'snapshot' &&
1013                 defined $refname && index($refname, '.') != -1 &&
1014                 $refname eq $input_params{'hash'} &&
1015                 !defined $input_params{'snapshot_format'}) {
1016                 # We loop over the known snapshot formats, checking for
1017                 # extensions. Allowed extensions are both the defined suffix
1018                 # (which includes the initial dot already) and the snapshot
1019                 # format key itself, with a prepended dot
1020                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
1021                         my $hash = $refname;
1022                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
1023                                 next;
1024                         }
1025                         my $sfx = $1;
1026                         # a valid suffix was found, so set the snapshot format
1027                         # and reset the hash parameter
1028                         $input_params{'snapshot_format'} = $fmt;
1029                         $input_params{'hash'} = $hash;
1030                         # we also set the format suffix to the one requested
1031                         # in the URL: this way a request for e.g. .tgz returns
1032                         # a .tgz instead of a .tar.gz
1033                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
1034                         last;
1035                 }
1036         }
1037 }
1038
1039 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
1040      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
1041      $searchtext, $search_regexp, $project_filter);
1042 sub evaluate_and_validate_params {
1043         our $action = $input_params{'action'};
1044         if (defined $action) {
1045                 if (!is_valid_action($action)) {
1046                         die_error(400, "Invalid action parameter");
1047                 }
1048         }
1049
1050         # parameters which are pathnames
1051         our $project = $input_params{'project'};
1052         if (defined $project) {
1053                 if (!is_valid_project($project)) {
1054                         undef $project;
1055                         die_error(404, "No such project");
1056                 }
1057         }
1058
1059         our $project_filter = $input_params{'project_filter'};
1060         if (defined $project_filter) {
1061                 if (!is_valid_pathname($project_filter)) {
1062                         die_error(404, "Invalid project_filter parameter");
1063                 }
1064         }
1065
1066         our $file_name = $input_params{'file_name'};
1067         if (defined $file_name) {
1068                 if (!is_valid_pathname($file_name)) {
1069                         die_error(400, "Invalid file parameter");
1070                 }
1071         }
1072
1073         our $file_parent = $input_params{'file_parent'};
1074         if (defined $file_parent) {
1075                 if (!is_valid_pathname($file_parent)) {
1076                         die_error(400, "Invalid file parent parameter");
1077                 }
1078         }
1079
1080         # parameters which are refnames
1081         our $hash = $input_params{'hash'};
1082         if (defined $hash) {
1083                 if (!is_valid_refname($hash)) {
1084                         die_error(400, "Invalid hash parameter");
1085                 }
1086         }
1087
1088         our $hash_parent = $input_params{'hash_parent'};
1089         if (defined $hash_parent) {
1090                 if (!is_valid_refname($hash_parent)) {
1091                         die_error(400, "Invalid hash parent parameter");
1092                 }
1093         }
1094
1095         our $hash_base = $input_params{'hash_base'};
1096         if (defined $hash_base) {
1097                 if (!is_valid_refname($hash_base)) {
1098                         die_error(400, "Invalid hash base parameter");
1099                 }
1100         }
1101
1102         our @extra_options = @{$input_params{'extra_options'}};
1103         # @extra_options is always defined, since it can only be (currently) set from
1104         # CGI, and $cgi->param() returns the empty array in array context if the param
1105         # is not set
1106         foreach my $opt (@extra_options) {
1107                 if (not exists $allowed_options{$opt}) {
1108                         die_error(400, "Invalid option parameter");
1109                 }
1110                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
1111                         die_error(400, "Invalid option parameter for this action");
1112                 }
1113         }
1114
1115         our $hash_parent_base = $input_params{'hash_parent_base'};
1116         if (defined $hash_parent_base) {
1117                 if (!is_valid_refname($hash_parent_base)) {
1118                         die_error(400, "Invalid hash parent base parameter");
1119                 }
1120         }
1121
1122         # other parameters
1123         our $page = $input_params{'page'};
1124         if (defined $page) {
1125                 if ($page =~ m/[^0-9]/) {
1126                         die_error(400, "Invalid page parameter");
1127                 }
1128         }
1129
1130         our $searchtype = $input_params{'searchtype'};
1131         if (defined $searchtype) {
1132                 if ($searchtype =~ m/[^a-z]/) {
1133                         die_error(400, "Invalid searchtype parameter");
1134                 }
1135         }
1136
1137         our $search_use_regexp = $input_params{'search_use_regexp'};
1138
1139         our $searchtext = $input_params{'searchtext'};
1140         our $search_regexp = undef;
1141         if (defined $searchtext) {
1142                 if (length($searchtext) < 2) {
1143                         die_error(403, "At least two characters are required for search parameter");
1144                 }
1145                 if ($search_use_regexp) {
1146                         $search_regexp = $searchtext;
1147                         if (!eval { qr/$search_regexp/; 1; }) {
1148                                 (my $error = $@) =~ s/ at \S+ line \d+.*\n?//;
1149                                 die_error(400, "Invalid search regexp '$search_regexp'",
1150                                           esc_html($error));
1151                         }
1152                 } else {
1153                         $search_regexp = quotemeta $searchtext;
1154                 }
1155         }
1156 }
1157
1158 # path to the current git repository
1159 our $git_dir;
1160 sub evaluate_git_dir {
1161         our $git_dir = "$projectroot/$project" if $project;
1162 }
1163
1164 our (@snapshot_fmts, $git_avatar, @extra_branch_refs);
1165 sub configure_gitweb_features {
1166         # list of supported snapshot formats
1167         our @snapshot_fmts = gitweb_get_feature('snapshot');
1168         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
1169
1170         # check that the avatar feature is set to a known provider name,
1171         # and for each provider check if the dependencies are satisfied.
1172         # if the provider name is invalid or the dependencies are not met,
1173         # reset $git_avatar to the empty string.
1174         our ($git_avatar) = gitweb_get_feature('avatar');
1175         if ($git_avatar eq 'gravatar') {
1176                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
1177         } elsif ($git_avatar eq 'picon') {
1178                 # no dependencies
1179         } else {
1180                 $git_avatar = '';
1181         }
1182
1183         our @extra_branch_refs = gitweb_get_feature('extra-branch-refs');
1184         @extra_branch_refs = filter_and_validate_refs (@extra_branch_refs);
1185 }
1186
1187 sub get_branch_refs {
1188         return ('heads', @extra_branch_refs);
1189 }
1190
1191 # custom error handler: 'die <message>' is Internal Server Error
1192 sub handle_errors_html {
1193         my $msg = shift; # it is already HTML escaped
1194
1195         # to avoid infinite loop where error occurs in die_error,
1196         # change handler to default handler, disabling handle_errors_html
1197         set_message("Error occurred when inside die_error:\n$msg");
1198
1199         # you cannot jump out of die_error when called as error handler;
1200         # the subroutine set via CGI::Carp::set_message is called _after_
1201         # HTTP headers are already written, so it cannot write them itself
1202         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1203 }
1204 set_message(\&handle_errors_html);
1205
1206 # dispatch
1207 sub dispatch {
1208         if (!defined $action) {
1209                 if (defined $hash) {
1210                         $action = git_get_type($hash);
1211                         $action or die_error(404, "Object does not exist");
1212                 } elsif (defined $hash_base && defined $file_name) {
1213                         $action = git_get_type("$hash_base:$file_name");
1214                         $action or die_error(404, "File or directory does not exist");
1215                 } elsif (defined $project) {
1216                         $action = 'summary';
1217                 } else {
1218                         $action = 'project_list';
1219                 }
1220         }
1221         if (!defined($actions{$action})) {
1222                 die_error(400, "Unknown action");
1223         }
1224         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1225             !$project) {
1226                 die_error(400, "Project needed");
1227         }
1228         $actions{$action}->();
1229 }
1230
1231 sub reset_timer {
1232         our $t0 = [ gettimeofday() ]
1233                 if defined $t0;
1234         our $number_of_git_cmds = 0;
1235 }
1236
1237 our $first_request = 1;
1238 sub run_request {
1239         reset_timer();
1240
1241         evaluate_uri();
1242         if ($first_request) {
1243                 evaluate_gitweb_config();
1244                 evaluate_git_version();
1245         }
1246         if ($per_request_config) {
1247                 if (ref($per_request_config) eq 'CODE') {
1248                         $per_request_config->();
1249                 } elsif (!$first_request) {
1250                         evaluate_gitweb_config();
1251                 }
1252         }
1253         check_loadavg();
1254
1255         # $projectroot and $projects_list might be set in gitweb config file
1256         $projects_list ||= $projectroot;
1257
1258         evaluate_query_params();
1259         evaluate_path_info();
1260         evaluate_and_validate_params();
1261         evaluate_git_dir();
1262
1263         configure_gitweb_features();
1264
1265         dispatch();
1266 }
1267
1268 our $is_last_request = sub { 1 };
1269 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1270 our $CGI = 'CGI';
1271 our $cgi;
1272 sub configure_as_fcgi {
1273         require CGI::Fast;
1274         our $CGI = 'CGI::Fast';
1275
1276         my $request_number = 0;
1277         # let each child service 100 requests
1278         our $is_last_request = sub { ++$request_number > 100 };
1279 }
1280 sub evaluate_argv {
1281         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1282         configure_as_fcgi()
1283                 if $script_name =~ /\.fcgi$/;
1284
1285         return unless (@ARGV);
1286
1287         require Getopt::Long;
1288         Getopt::Long::GetOptions(
1289                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1290                 'nproc|n=i' => sub {
1291                         my ($arg, $val) = @_;
1292                         return unless eval { require FCGI::ProcManager; 1; };
1293                         my $proc_manager = FCGI::ProcManager->new({
1294                                 n_processes => $val,
1295                         });
1296                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1297                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1298                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1299                 },
1300         );
1301 }
1302
1303 sub run {
1304         evaluate_argv();
1305
1306         $first_request = 1;
1307         $pre_listen_hook->()
1308                 if $pre_listen_hook;
1309
1310  REQUEST:
1311         while ($cgi = $CGI->new()) {
1312                 $pre_dispatch_hook->()
1313                         if $pre_dispatch_hook;
1314
1315                 run_request();
1316
1317                 $post_dispatch_hook->()
1318                         if $post_dispatch_hook;
1319                 $first_request = 0;
1320
1321                 last REQUEST if ($is_last_request->());
1322         }
1323
1324  DONE_GITWEB:
1325         1;
1326 }
1327
1328 run();
1329
1330 if (defined caller) {
1331         # wrapped in a subroutine processing requests,
1332         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1333         return;
1334 } else {
1335         # pure CGI script, serving single request
1336         exit;
1337 }
1338
1339 ## ======================================================================
1340 ## action links
1341
1342 # possible values of extra options
1343 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1344 # -replay => 1      - start from a current view (replay with modifications)
1345 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1346 # -anchor => ANCHOR - add #ANCHOR to end of URL, implies -replay if used alone
1347 sub href {
1348         my %params = @_;
1349         # default is to use -absolute url() i.e. $my_uri
1350         my $href = $params{-full} ? $my_url : $my_uri;
1351
1352         # implicit -replay, must be first of implicit params
1353         $params{-replay} = 1 if (keys %params == 1 && $params{-anchor});
1354
1355         $params{'project'} = $project unless exists $params{'project'};
1356
1357         if ($params{-replay}) {
1358                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1359                         if (!exists $params{$name}) {
1360                                 $params{$name} = $input_params{$name};
1361                         }
1362                 }
1363         }
1364
1365         my $use_pathinfo = gitweb_check_feature('pathinfo');
1366         if (defined $params{'project'} &&
1367             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1368                 # try to put as many parameters as possible in PATH_INFO:
1369                 #   - project name
1370                 #   - action
1371                 #   - hash_parent or hash_parent_base:/file_parent
1372                 #   - hash or hash_base:/filename
1373                 #   - the snapshot_format as an appropriate suffix
1374
1375                 # When the script is the root DirectoryIndex for the domain,
1376                 # $href here would be something like http://gitweb.example.com/
1377                 # Thus, we strip any trailing / from $href, to spare us double
1378                 # slashes in the final URL
1379                 $href =~ s,/$,,;
1380
1381                 # Then add the project name, if present
1382                 $href .= "/".esc_path_info($params{'project'});
1383                 delete $params{'project'};
1384
1385                 # since we destructively absorb parameters, we keep this
1386                 # boolean that remembers if we're handling a snapshot
1387                 my $is_snapshot = $params{'action'} eq 'snapshot';
1388
1389                 # Summary just uses the project path URL, any other action is
1390                 # added to the URL
1391                 if (defined $params{'action'}) {
1392                         $href .= "/".esc_path_info($params{'action'})
1393                                 unless $params{'action'} eq 'summary';
1394                         delete $params{'action'};
1395                 }
1396
1397                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1398                 # stripping nonexistent or useless pieces
1399                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1400                         || $params{'hash_parent'} || $params{'hash'});
1401                 if (defined $params{'hash_base'}) {
1402                         if (defined $params{'hash_parent_base'}) {
1403                                 $href .= esc_path_info($params{'hash_parent_base'});
1404                                 # skip the file_parent if it's the same as the file_name
1405                                 if (defined $params{'file_parent'}) {
1406                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1407                                                 delete $params{'file_parent'};
1408                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1409                                                 $href .= ":/".esc_path_info($params{'file_parent'});
1410                                                 delete $params{'file_parent'};
1411                                         }
1412                                 }
1413                                 $href .= "..";
1414                                 delete $params{'hash_parent'};
1415                                 delete $params{'hash_parent_base'};
1416                         } elsif (defined $params{'hash_parent'}) {
1417                                 $href .= esc_path_info($params{'hash_parent'}). "..";
1418                                 delete $params{'hash_parent'};
1419                         }
1420
1421                         $href .= esc_path_info($params{'hash_base'});
1422                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1423                                 $href .= ":/".esc_path_info($params{'file_name'});
1424                                 delete $params{'file_name'};
1425                         }
1426                         delete $params{'hash'};
1427                         delete $params{'hash_base'};
1428                 } elsif (defined $params{'hash'}) {
1429                         $href .= esc_path_info($params{'hash'});
1430                         delete $params{'hash'};
1431                 }
1432
1433                 # If the action was a snapshot, we can absorb the
1434                 # snapshot_format parameter too
1435                 if ($is_snapshot) {
1436                         my $fmt = $params{'snapshot_format'};
1437                         # snapshot_format should always be defined when href()
1438                         # is called, but just in case some code forgets, we
1439                         # fall back to the default
1440                         $fmt ||= $snapshot_fmts[0];
1441                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1442                         delete $params{'snapshot_format'};
1443                 }
1444         }
1445
1446         # now encode the parameters explicitly
1447         my @result = ();
1448         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1449                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1450                 if (defined $params{$name}) {
1451                         if (ref($params{$name}) eq "ARRAY") {
1452                                 foreach my $par (@{$params{$name}}) {
1453                                         push @result, $symbol . "=" . esc_param($par);
1454                                 }
1455                         } else {
1456                                 push @result, $symbol . "=" . esc_param($params{$name});
1457                         }
1458                 }
1459         }
1460         $href .= "?" . join(';', @result) if scalar @result;
1461
1462         # final transformation: trailing spaces must be escaped (URI-encoded)
1463         $href =~ s/(\s+)$/CGI::escape($1)/e;
1464
1465         if ($params{-anchor}) {
1466                 $href .= "#".esc_param($params{-anchor});
1467         }
1468
1469         return $href;
1470 }
1471
1472
1473 ## ======================================================================
1474 ## validation, quoting/unquoting and escaping
1475
1476 sub is_valid_action {
1477         my $input = shift;
1478         return undef unless exists $actions{$input};
1479         return 1;
1480 }
1481
1482 sub is_valid_project {
1483         my $input = shift;
1484
1485         return unless defined $input;
1486         if (!is_valid_pathname($input) ||
1487                 !(-d "$projectroot/$input") ||
1488                 !check_export_ok("$projectroot/$input") ||
1489                 ($strict_export && !project_in_list($input))) {
1490                 return undef;
1491         } else {
1492                 return 1;
1493         }
1494 }
1495
1496 sub is_valid_pathname {
1497         my $input = shift;
1498
1499         return undef unless defined $input;
1500         # no '.' or '..' as elements of path, i.e. no '.' or '..'
1501         # at the beginning, at the end, and between slashes.
1502         # also this catches doubled slashes
1503         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1504                 return undef;
1505         }
1506         # no null characters
1507         if ($input =~ m!\0!) {
1508                 return undef;
1509         }
1510         return 1;
1511 }
1512
1513 sub is_valid_ref_format {
1514         my $input = shift;
1515
1516         return undef unless defined $input;
1517         # restrictions on ref name according to git-check-ref-format
1518         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1519                 return undef;
1520         }
1521         return 1;
1522 }
1523
1524 sub is_valid_refname {
1525         my $input = shift;
1526
1527         return undef unless defined $input;
1528         # textual hashes are O.K.
1529         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1530                 return 1;
1531         }
1532         # it must be correct pathname
1533         is_valid_pathname($input) or return undef;
1534         # check git-check-ref-format restrictions
1535         is_valid_ref_format($input) or return undef;
1536         return 1;
1537 }
1538
1539 # decode sequences of octets in utf8 into Perl's internal form,
1540 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1541 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1542 sub to_utf8 {
1543         my $str = shift;
1544         return undef unless defined $str;
1545
1546         if (utf8::is_utf8($str) || utf8::decode($str)) {
1547                 return $str;
1548         } else {
1549                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1550         }
1551 }
1552
1553 # quote unsafe chars, but keep the slash, even when it's not
1554 # correct, but quoted slashes look too horrible in bookmarks
1555 sub esc_param {
1556         my $str = shift;
1557         return undef unless defined $str;
1558         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1559         $str =~ s/ /\+/g;
1560         return $str;
1561 }
1562
1563 # the quoting rules for path_info fragment are slightly different
1564 sub esc_path_info {
1565         my $str = shift;
1566         return undef unless defined $str;
1567
1568         # path_info doesn't treat '+' as space (specially), but '?' must be escaped
1569         $str =~ s/([^A-Za-z0-9\-_.~();\/;:@&= +]+)/CGI::escape($1)/eg;
1570
1571         return $str;
1572 }
1573
1574 # quote unsafe chars in whole URL, so some characters cannot be quoted
1575 sub esc_url {
1576         my $str = shift;
1577         return undef unless defined $str;
1578         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1579         $str =~ s/ /\+/g;
1580         return $str;
1581 }
1582
1583 # quote unsafe characters in HTML attributes
1584 sub esc_attr {
1585
1586         # for XHTML conformance escaping '"' to '&quot;' is not enough
1587         return esc_html(@_);
1588 }
1589
1590 # replace invalid utf8 character with SUBSTITUTION sequence
1591 sub esc_html {
1592         my $str = shift;
1593         my %opts = @_;
1594
1595         return undef unless defined $str;
1596
1597         $str = to_utf8($str);
1598         $str = $cgi->escapeHTML($str);
1599         if ($opts{'-nbsp'}) {
1600                 $str =~ s/ /&nbsp;/g;
1601         }
1602         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1603         return $str;
1604 }
1605
1606 # quote control characters and escape filename to HTML
1607 sub esc_path {
1608         my $str = shift;
1609         my %opts = @_;
1610
1611         return undef unless defined $str;
1612
1613         $str = to_utf8($str);
1614         $str = $cgi->escapeHTML($str);
1615         if ($opts{'-nbsp'}) {
1616                 $str =~ s/ /&nbsp;/g;
1617         }
1618         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1619         return $str;
1620 }
1621
1622 # Sanitize for use in XHTML + application/xml+xhtml (valid XML 1.0)
1623 sub sanitize {
1624         my $str = shift;
1625
1626         return undef unless defined $str;
1627
1628         $str = to_utf8($str);
1629         $str =~ s|([[:cntrl:]])|(index("\t\n\r", $1) != -1 ? $1 : quot_cec($1))|eg;
1630         return $str;
1631 }
1632
1633 # Make control characters "printable", using character escape codes (CEC)
1634 sub quot_cec {
1635         my $cntrl = shift;
1636         my %opts = @_;
1637         my %es = ( # character escape codes, aka escape sequences
1638                 "\t" => '\t',   # tab            (HT)
1639                 "\n" => '\n',   # line feed      (LF)
1640                 "\r" => '\r',   # carrige return (CR)
1641                 "\f" => '\f',   # form feed      (FF)
1642                 "\b" => '\b',   # backspace      (BS)
1643                 "\a" => '\a',   # alarm (bell)   (BEL)
1644                 "\e" => '\e',   # escape         (ESC)
1645                 "\013" => '\v', # vertical tab   (VT)
1646                 "\000" => '\0', # nul character  (NUL)
1647         );
1648         my $chr = ( (exists $es{$cntrl})
1649                     ? $es{$cntrl}
1650                     : sprintf('\%2x', ord($cntrl)) );
1651         if ($opts{-nohtml}) {
1652                 return $chr;
1653         } else {
1654                 return "<span class=\"cntrl\">$chr</span>";
1655         }
1656 }
1657
1658 # Alternatively use unicode control pictures codepoints,
1659 # Unicode "printable representation" (PR)
1660 sub quot_upr {
1661         my $cntrl = shift;
1662         my %opts = @_;
1663
1664         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1665         if ($opts{-nohtml}) {
1666                 return $chr;
1667         } else {
1668                 return "<span class=\"cntrl\">$chr</span>";
1669         }
1670 }
1671
1672 # git may return quoted and escaped filenames
1673 sub unquote {
1674         my $str = shift;
1675
1676         sub unq {
1677                 my $seq = shift;
1678                 my %es = ( # character escape codes, aka escape sequences
1679                         't' => "\t",   # tab            (HT, TAB)
1680                         'n' => "\n",   # newline        (NL)
1681                         'r' => "\r",   # return         (CR)
1682                         'f' => "\f",   # form feed      (FF)
1683                         'b' => "\b",   # backspace      (BS)
1684                         'a' => "\a",   # alarm (bell)   (BEL)
1685                         'e' => "\e",   # escape         (ESC)
1686                         'v' => "\013", # vertical tab   (VT)
1687                 );
1688
1689                 if ($seq =~ m/^[0-7]{1,3}$/) {
1690                         # octal char sequence
1691                         return chr(oct($seq));
1692                 } elsif (exists $es{$seq}) {
1693                         # C escape sequence, aka character escape code
1694                         return $es{$seq};
1695                 }
1696                 # quoted ordinary character
1697                 return $seq;
1698         }
1699
1700         if ($str =~ m/^"(.*)"$/) {
1701                 # needs unquoting
1702                 $str = $1;
1703                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1704         }
1705         return $str;
1706 }
1707
1708 # escape tabs (convert tabs to spaces)
1709 sub untabify {
1710         my $line = shift;
1711
1712         while ((my $pos = index($line, "\t")) != -1) {
1713                 if (my $count = (8 - ($pos % 8))) {
1714                         my $spaces = ' ' x $count;
1715                         $line =~ s/\t/$spaces/;
1716                 }
1717         }
1718
1719         return $line;
1720 }
1721
1722 sub project_in_list {
1723         my $project = shift;
1724         my @list = git_get_projects_list();
1725         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1726 }
1727
1728 ## ----------------------------------------------------------------------
1729 ## HTML aware string manipulation
1730
1731 # Try to chop given string on a word boundary between position
1732 # $len and $len+$add_len. If there is no word boundary there,
1733 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1734 # (marking chopped part) would be longer than given string.
1735 sub chop_str {
1736         my $str = shift;
1737         my $len = shift;
1738         my $add_len = shift || 10;
1739         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1740
1741         # Make sure perl knows it is utf8 encoded so we don't
1742         # cut in the middle of a utf8 multibyte char.
1743         $str = to_utf8($str);
1744
1745         # allow only $len chars, but don't cut a word if it would fit in $add_len
1746         # if it doesn't fit, cut it if it's still longer than the dots we would add
1747         # remove chopped character entities entirely
1748
1749         # when chopping in the middle, distribute $len into left and right part
1750         # return early if chopping wouldn't make string shorter
1751         if ($where eq 'center') {
1752                 return $str if ($len + 5 >= length($str)); # filler is length 5
1753                 $len = int($len/2);
1754         } else {
1755                 return $str if ($len + 4 >= length($str)); # filler is length 4
1756         }
1757
1758         # regexps: ending and beginning with word part up to $add_len
1759         my $endre = qr/.{$len}\w{0,$add_len}/;
1760         my $begre = qr/\w{0,$add_len}.{$len}/;
1761
1762         if ($where eq 'left') {
1763                 $str =~ m/^(.*?)($begre)$/;
1764                 my ($lead, $body) = ($1, $2);
1765                 if (length($lead) > 4) {
1766                         $lead = " ...";
1767                 }
1768                 return "$lead$body";
1769
1770         } elsif ($where eq 'center') {
1771                 $str =~ m/^($endre)(.*)$/;
1772                 my ($left, $str)  = ($1, $2);
1773                 $str =~ m/^(.*?)($begre)$/;
1774                 my ($mid, $right) = ($1, $2);
1775                 if (length($mid) > 5) {
1776                         $mid = " ... ";
1777                 }
1778                 return "$left$mid$right";
1779
1780         } else {
1781                 $str =~ m/^($endre)(.*)$/;
1782                 my $body = $1;
1783                 my $tail = $2;
1784                 if (length($tail) > 4) {
1785                         $tail = "... ";
1786                 }
1787                 return "$body$tail";
1788         }
1789 }
1790
1791 # takes the same arguments as chop_str, but also wraps a <span> around the
1792 # result with a title attribute if it does get chopped. Additionally, the
1793 # string is HTML-escaped.
1794 sub chop_and_escape_str {
1795         my ($str) = @_;
1796
1797         my $chopped = chop_str(@_);
1798         $str = to_utf8($str);
1799         if ($chopped eq $str) {
1800                 return esc_html($chopped);
1801         } else {
1802                 $str =~ s/[[:cntrl:]]/?/g;
1803                 return $cgi->span({-title=>$str}, esc_html($chopped));
1804         }
1805 }
1806
1807 # Highlight selected fragments of string, using given CSS class,
1808 # and escape HTML.  It is assumed that fragments do not overlap.
1809 # Regions are passed as list of pairs (array references).
1810 #
1811 # Example: esc_html_hl_regions("foobar", "mark", [ 0, 3 ]) returns
1812 # '<span class="mark">foo</span>bar'
1813 sub esc_html_hl_regions {
1814         my ($str, $css_class, @sel) = @_;
1815         my %opts = grep { ref($_) ne 'ARRAY' } @sel;
1816         @sel     = grep { ref($_) eq 'ARRAY' } @sel;
1817         return esc_html($str, %opts) unless @sel;
1818
1819         my $out = '';
1820         my $pos = 0;
1821
1822         for my $s (@sel) {
1823                 my ($begin, $end) = @$s;
1824
1825                 # Don't create empty <span> elements.
1826                 next if $end <= $begin;
1827
1828                 my $escaped = esc_html(substr($str, $begin, $end - $begin),
1829                                        %opts);
1830
1831                 $out .= esc_html(substr($str, $pos, $begin - $pos), %opts)
1832                         if ($begin - $pos > 0);
1833                 $out .= $cgi->span({-class => $css_class}, $escaped);
1834
1835                 $pos = $end;
1836         }
1837         $out .= esc_html(substr($str, $pos), %opts)
1838                 if ($pos < length($str));
1839
1840         return $out;
1841 }
1842
1843 # return positions of beginning and end of each match
1844 sub matchpos_list {
1845         my ($str, $regexp) = @_;
1846         return unless (defined $str && defined $regexp);
1847
1848         my @matches;
1849         while ($str =~ /$regexp/g) {
1850                 push @matches, [$-[0], $+[0]];
1851         }
1852         return @matches;
1853 }
1854
1855 # highlight match (if any), and escape HTML
1856 sub esc_html_match_hl {
1857         my ($str, $regexp) = @_;
1858         return esc_html($str) unless defined $regexp;
1859
1860         my @matches = matchpos_list($str, $regexp);
1861         return esc_html($str) unless @matches;
1862
1863         return esc_html_hl_regions($str, 'match', @matches);
1864 }
1865
1866
1867 # highlight match (if any) of shortened string, and escape HTML
1868 sub esc_html_match_hl_chopped {
1869         my ($str, $chopped, $regexp) = @_;
1870         return esc_html_match_hl($str, $regexp) unless defined $chopped;
1871
1872         my @matches = matchpos_list($str, $regexp);
1873         return esc_html($chopped) unless @matches;
1874
1875         # filter matches so that we mark chopped string
1876         my $tail = "... "; # see chop_str
1877         unless ($chopped =~ s/\Q$tail\E$//) {
1878                 $tail = '';
1879         }
1880         my $chop_len = length($chopped);
1881         my $tail_len = length($tail);
1882         my @filtered;
1883
1884         for my $m (@matches) {
1885                 if ($m->[0] > $chop_len) {
1886                         push @filtered, [ $chop_len, $chop_len + $tail_len ] if ($tail_len > 0);
1887                         last;
1888                 } elsif ($m->[1] > $chop_len) {
1889                         push @filtered, [ $m->[0], $chop_len + $tail_len ];
1890                         last;
1891                 }
1892                 push @filtered, $m;
1893         }
1894
1895         return esc_html_hl_regions($chopped . $tail, 'match', @filtered);
1896 }
1897
1898 ## ----------------------------------------------------------------------
1899 ## functions returning short strings
1900
1901 # CSS class for given age value (in seconds)
1902 sub age_class {
1903         my $age = shift;
1904
1905         if (!defined $age) {
1906                 return "noage";
1907         } elsif ($age < 60*60*2) {
1908                 return "age0";
1909         } elsif ($age < 60*60*24*2) {
1910                 return "age1";
1911         } else {
1912                 return "age2";
1913         }
1914 }
1915
1916 # convert age in seconds to "nn units ago" string
1917 sub age_string {
1918         my $age = shift;
1919         my $age_str;
1920
1921         if ($age > 60*60*24*365*2) {
1922                 $age_str = (int $age/60/60/24/365);
1923                 $age_str .= " years ago";
1924         } elsif ($age > 60*60*24*(365/12)*2) {
1925                 $age_str = int $age/60/60/24/(365/12);
1926                 $age_str .= " months ago";
1927         } elsif ($age > 60*60*24*7*2) {
1928                 $age_str = int $age/60/60/24/7;
1929                 $age_str .= " weeks ago";
1930         } elsif ($age > 60*60*24*2) {
1931                 $age_str = int $age/60/60/24;
1932                 $age_str .= " days ago";
1933         } elsif ($age > 60*60*2) {
1934                 $age_str = int $age/60/60;
1935                 $age_str .= " hours ago";
1936         } elsif ($age > 60*2) {
1937                 $age_str = int $age/60;
1938                 $age_str .= " min ago";
1939         } elsif ($age > 2) {
1940                 $age_str = int $age;
1941                 $age_str .= " sec ago";
1942         } else {
1943                 $age_str .= " right now";
1944         }
1945         return $age_str;
1946 }
1947
1948 use constant {
1949         S_IFINVALID => 0030000,
1950         S_IFGITLINK => 0160000,
1951 };
1952
1953 # submodule/subproject, a commit object reference
1954 sub S_ISGITLINK {
1955         my $mode = shift;
1956
1957         return (($mode & S_IFMT) == S_IFGITLINK)
1958 }
1959
1960 # convert file mode in octal to symbolic file mode string
1961 sub mode_str {
1962         my $mode = oct shift;
1963
1964         if (S_ISGITLINK($mode)) {
1965                 return 'm---------';
1966         } elsif (S_ISDIR($mode & S_IFMT)) {
1967                 return 'drwxr-xr-x';
1968         } elsif (S_ISLNK($mode)) {
1969                 return 'lrwxrwxrwx';
1970         } elsif (S_ISREG($mode)) {
1971                 # git cares only about the executable bit
1972                 if ($mode & S_IXUSR) {
1973                         return '-rwxr-xr-x';
1974                 } else {
1975                         return '-rw-r--r--';
1976                 };
1977         } else {
1978                 return '----------';
1979         }
1980 }
1981
1982 # convert file mode in octal to file type string
1983 sub file_type {
1984         my $mode = shift;
1985
1986         if ($mode !~ m/^[0-7]+$/) {
1987                 return $mode;
1988         } else {
1989                 $mode = oct $mode;
1990         }
1991
1992         if (S_ISGITLINK($mode)) {
1993                 return "submodule";
1994         } elsif (S_ISDIR($mode & S_IFMT)) {
1995                 return "directory";
1996         } elsif (S_ISLNK($mode)) {
1997                 return "symlink";
1998         } elsif (S_ISREG($mode)) {
1999                 return "file";
2000         } else {
2001                 return "unknown";
2002         }
2003 }
2004
2005 # convert file mode in octal to file type description string
2006 sub file_type_long {
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($mode)) {
2022                 if ($mode & S_IXUSR) {
2023                         return "executable";
2024                 } else {
2025                         return "file";
2026                 };
2027         } else {
2028                 return "unknown";
2029         }
2030 }
2031
2032
2033 ## ----------------------------------------------------------------------
2034 ## functions returning short HTML fragments, or transforming HTML fragments
2035 ## which don't belong to other sections
2036
2037 # format line of commit message.
2038 sub format_log_line_html {
2039         my $line = shift;
2040
2041         $line = esc_html($line, -nbsp=>1);
2042         $line =~ s{
2043         \b
2044         (
2045             # The output of "git describe", e.g. v2.10.0-297-gf6727b0
2046             # or hadoop-20160921-113441-20-g094fb7d
2047             (?<!-) # see strbuf_check_tag_ref(). Tags can't start with -
2048             [A-Za-z0-9.-]+
2049             (?!\.) # refs can't end with ".", see check_refname_format()
2050             -g[0-9a-fA-F]{7,40}
2051             |
2052             # Just a normal looking Git SHA1
2053             [0-9a-fA-F]{7,40}
2054         )
2055         \b
2056     }{
2057                 $cgi->a({-href => href(action=>"object", hash=>$1),
2058                                         -class => "text"}, $1);
2059         }egx;
2060
2061         return $line;
2062 }
2063
2064 # format marker of refs pointing to given object
2065
2066 # the destination action is chosen based on object type and current context:
2067 # - for annotated tags, we choose the tag view unless it's the current view
2068 #   already, in which case we go to shortlog view
2069 # - for other refs, we keep the current view if we're in history, shortlog or
2070 #   log view, and select shortlog otherwise
2071 sub format_ref_marker {
2072         my ($refs, $id) = @_;
2073         my $markers = '';
2074
2075         if (defined $refs->{$id}) {
2076                 foreach my $ref (@{$refs->{$id}}) {
2077                         # this code exploits the fact that non-lightweight tags are the
2078                         # only indirect objects, and that they are the only objects for which
2079                         # we want to use tag instead of shortlog as action
2080                         my ($type, $name) = qw();
2081                         my $indirect = ($ref =~ s/\^\{\}$//);
2082                         # e.g. tags/v2.6.11 or heads/next
2083                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
2084                                 $type = $1;
2085                                 $name = $2;
2086                         } else {
2087                                 $type = "ref";
2088                                 $name = $ref;
2089                         }
2090
2091                         my $class = $type;
2092                         $class .= " indirect" if $indirect;
2093
2094                         my $dest_action = "shortlog";
2095
2096                         if ($indirect) {
2097                                 $dest_action = "tag" unless $action eq "tag";
2098                         } elsif ($action =~ /^(history|(short)?log)$/) {
2099                                 $dest_action = $action;
2100                         }
2101
2102                         my $dest = "";
2103                         $dest .= "refs/" unless $ref =~ m!^refs/!;
2104                         $dest .= $ref;
2105
2106                         my $link = $cgi->a({
2107                                 -href => href(
2108                                         action=>$dest_action,
2109                                         hash=>$dest
2110                                 )}, esc_html($name));
2111
2112                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
2113                                 $link . "</span>";
2114                 }
2115         }
2116
2117         if ($markers) {
2118                 return ' <span class="refs">'. $markers . '</span>';
2119         } else {
2120                 return "";
2121         }
2122 }
2123
2124 # format, perhaps shortened and with markers, title line
2125 sub format_subject_html {
2126         my ($long, $short, $href, $extra) = @_;
2127         $extra = '' unless defined($extra);
2128
2129         if (length($short) < length($long)) {
2130                 $long =~ s/[[:cntrl:]]/?/g;
2131                 return $cgi->a({-href => $href, -class => "list subject",
2132                                 -title => to_utf8($long)},
2133                        esc_html($short)) . $extra;
2134         } else {
2135                 return $cgi->a({-href => $href, -class => "list subject"},
2136                        esc_html($long)) . $extra;
2137         }
2138 }
2139
2140 # Rather than recomputing the url for an email multiple times, we cache it
2141 # after the first hit. This gives a visible benefit in views where the avatar
2142 # for the same email is used repeatedly (e.g. shortlog).
2143 # The cache is shared by all avatar engines (currently gravatar only), which
2144 # are free to use it as preferred. Since only one avatar engine is used for any
2145 # given page, there's no risk for cache conflicts.
2146 our %avatar_cache = ();
2147
2148 # Compute the picon url for a given email, by using the picon search service over at
2149 # http://www.cs.indiana.edu/picons/search.html
2150 sub picon_url {
2151         my $email = lc shift;
2152         if (!$avatar_cache{$email}) {
2153                 my ($user, $domain) = split('@', $email);
2154                 $avatar_cache{$email} =
2155                         "//www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
2156                         "$domain/$user/" .
2157                         "users+domains+unknown/up/single";
2158         }
2159         return $avatar_cache{$email};
2160 }
2161
2162 # Compute the gravatar url for a given email, if it's not in the cache already.
2163 # Gravatar stores only the part of the URL before the size, since that's the
2164 # one computationally more expensive. This also allows reuse of the cache for
2165 # different sizes (for this particular engine).
2166 sub gravatar_url {
2167         my $email = lc shift;
2168         my $size = shift;
2169         $avatar_cache{$email} ||=
2170                 "//www.gravatar.com/avatar/" .
2171                         Digest::MD5::md5_hex($email) . "?s=";
2172         return $avatar_cache{$email} . $size;
2173 }
2174
2175 # Insert an avatar for the given $email at the given $size if the feature
2176 # is enabled.
2177 sub git_get_avatar {
2178         my ($email, %opts) = @_;
2179         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
2180         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
2181         $opts{-size} ||= 'default';
2182         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
2183         my $url = "";
2184         if ($git_avatar eq 'gravatar') {
2185                 $url = gravatar_url($email, $size);
2186         } elsif ($git_avatar eq 'picon') {
2187                 $url = picon_url($email);
2188         }
2189         # Other providers can be added by extending the if chain, defining $url
2190         # as needed. If no variant puts something in $url, we assume avatars
2191         # are completely disabled/unavailable.
2192         if ($url) {
2193                 return $pre_white .
2194                        "<img width=\"$size\" " .
2195                             "class=\"avatar\" " .
2196                             "src=\"".esc_url($url)."\" " .
2197                             "alt=\"\" " .
2198                        "/>" . $post_white;
2199         } else {
2200                 return "";
2201         }
2202 }
2203
2204 sub format_search_author {
2205         my ($author, $searchtype, $displaytext) = @_;
2206         my $have_search = gitweb_check_feature('search');
2207
2208         if ($have_search) {
2209                 my $performed = "";
2210                 if ($searchtype eq 'author') {
2211                         $performed = "authored";
2212                 } elsif ($searchtype eq 'committer') {
2213                         $performed = "committed";
2214                 }
2215
2216                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
2217                                 searchtext=>$author,
2218                                 searchtype=>$searchtype), class=>"list",
2219                                 title=>"Search for commits $performed by $author"},
2220                                 $displaytext);
2221
2222         } else {
2223                 return $displaytext;
2224         }
2225 }
2226
2227 # format the author name of the given commit with the given tag
2228 # the author name is chopped and escaped according to the other
2229 # optional parameters (see chop_str).
2230 sub format_author_html {
2231         my $tag = shift;
2232         my $co = shift;
2233         my $author = chop_and_escape_str($co->{'author_name'}, @_);
2234         return "<$tag class=\"author\">" .
2235                format_search_author($co->{'author_name'}, "author",
2236                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
2237                        $author) .
2238                "</$tag>";
2239 }
2240
2241 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
2242 sub format_git_diff_header_line {
2243         my $line = shift;
2244         my $diffinfo = shift;
2245         my ($from, $to) = @_;
2246
2247         if ($diffinfo->{'nparents'}) {
2248                 # combined diff
2249                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
2250                 if ($to->{'href'}) {
2251                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2252                                          esc_path($to->{'file'}));
2253                 } else { # file was deleted (no href)
2254                         $line .= esc_path($to->{'file'});
2255                 }
2256         } else {
2257                 # "ordinary" diff
2258                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
2259                 if ($from->{'href'}) {
2260                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
2261                                          'a/' . esc_path($from->{'file'}));
2262                 } else { # file was added (no href)
2263                         $line .= 'a/' . esc_path($from->{'file'});
2264                 }
2265                 $line .= ' ';
2266                 if ($to->{'href'}) {
2267                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
2268                                          'b/' . esc_path($to->{'file'}));
2269                 } else { # file was deleted
2270                         $line .= 'b/' . esc_path($to->{'file'});
2271                 }
2272         }
2273
2274         return "<div class=\"diff header\">$line</div>\n";
2275 }
2276
2277 # format extended diff header line, before patch itself
2278 sub format_extended_diff_header_line {
2279         my $line = shift;
2280         my $diffinfo = shift;
2281         my ($from, $to) = @_;
2282
2283         # match <path>
2284         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
2285                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2286                                        esc_path($from->{'file'}));
2287         }
2288         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
2289                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2290                                  esc_path($to->{'file'}));
2291         }
2292         # match single <mode>
2293         if ($line =~ m/\s(\d{6})$/) {
2294                 $line .= '<span class="info"> (' .
2295                          file_type_long($1) .
2296                          ')</span>';
2297         }
2298         # match <hash>
2299         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
2300                 # can match only for combined diff
2301                 $line = 'index ';
2302                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2303                         if ($from->{'href'}[$i]) {
2304                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
2305                                                   -class=>"hash"},
2306                                                  substr($diffinfo->{'from_id'}[$i],0,7));
2307                         } else {
2308                                 $line .= '0' x 7;
2309                         }
2310                         # separator
2311                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
2312                 }
2313                 $line .= '..';
2314                 if ($to->{'href'}) {
2315                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2316                                          substr($diffinfo->{'to_id'},0,7));
2317                 } else {
2318                         $line .= '0' x 7;
2319                 }
2320
2321         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
2322                 # can match only for ordinary diff
2323                 my ($from_link, $to_link);
2324                 if ($from->{'href'}) {
2325                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
2326                                              substr($diffinfo->{'from_id'},0,7));
2327                 } else {
2328                         $from_link = '0' x 7;
2329                 }
2330                 if ($to->{'href'}) {
2331                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
2332                                            substr($diffinfo->{'to_id'},0,7));
2333                 } else {
2334                         $to_link = '0' x 7;
2335                 }
2336                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
2337                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
2338         }
2339
2340         return $line . "<br/>\n";
2341 }
2342
2343 # format from-file/to-file diff header
2344 sub format_diff_from_to_header {
2345         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
2346         my $line;
2347         my $result = '';
2348
2349         $line = $from_line;
2350         #assert($line =~ m/^---/) if DEBUG;
2351         # no extra formatting for "^--- /dev/null"
2352         if (! $diffinfo->{'nparents'}) {
2353                 # ordinary (single parent) diff
2354                 if ($line =~ m!^--- "?a/!) {
2355                         if ($from->{'href'}) {
2356                                 $line = '--- a/' .
2357                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
2358                                                 esc_path($from->{'file'}));
2359                         } else {
2360                                 $line = '--- a/' .
2361                                         esc_path($from->{'file'});
2362                         }
2363                 }
2364                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2365
2366         } else {
2367                 # combined diff (merge commit)
2368                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2369                         if ($from->{'href'}[$i]) {
2370                                 $line = '--- ' .
2371                                         $cgi->a({-href=>href(action=>"blobdiff",
2372                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2373                                                              hash_parent_base=>$parents[$i],
2374                                                              file_parent=>$from->{'file'}[$i],
2375                                                              hash=>$diffinfo->{'to_id'},
2376                                                              hash_base=>$hash,
2377                                                              file_name=>$to->{'file'}),
2378                                                  -class=>"path",
2379                                                  -title=>"diff" . ($i+1)},
2380                                                 $i+1) .
2381                                         '/' .
2382                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2383                                                 esc_path($from->{'file'}[$i]));
2384                         } else {
2385                                 $line = '--- /dev/null';
2386                         }
2387                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2388                 }
2389         }
2390
2391         $line = $to_line;
2392         #assert($line =~ m/^\+\+\+/) if DEBUG;
2393         # no extra formatting for "^+++ /dev/null"
2394         if ($line =~ m!^\+\+\+ "?b/!) {
2395                 if ($to->{'href'}) {
2396                         $line = '+++ b/' .
2397                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2398                                         esc_path($to->{'file'}));
2399                 } else {
2400                         $line = '+++ b/' .
2401                                 esc_path($to->{'file'});
2402                 }
2403         }
2404         $result .= qq!<div class="diff to_file">$line</div>\n!;
2405
2406         return $result;
2407 }
2408
2409 # create note for patch simplified by combined diff
2410 sub format_diff_cc_simplified {
2411         my ($diffinfo, @parents) = @_;
2412         my $result = '';
2413
2414         $result .= "<div class=\"diff header\">" .
2415                    "diff --cc ";
2416         if (!is_deleted($diffinfo)) {
2417                 $result .= $cgi->a({-href => href(action=>"blob",
2418                                                   hash_base=>$hash,
2419                                                   hash=>$diffinfo->{'to_id'},
2420                                                   file_name=>$diffinfo->{'to_file'}),
2421                                     -class => "path"},
2422                                    esc_path($diffinfo->{'to_file'}));
2423         } else {
2424                 $result .= esc_path($diffinfo->{'to_file'});
2425         }
2426         $result .= "</div>\n" . # class="diff header"
2427                    "<div class=\"diff nodifferences\">" .
2428                    "Simple merge" .
2429                    "</div>\n"; # class="diff nodifferences"
2430
2431         return $result;
2432 }
2433
2434 sub diff_line_class {
2435         my ($line, $from, $to) = @_;
2436
2437         # ordinary diff
2438         my $num_sign = 1;
2439         # combined diff
2440         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2441                 $num_sign = scalar @{$from->{'href'}};
2442         }
2443
2444         my @diff_line_classifier = (
2445                 { regexp => qr/^\@\@{$num_sign} /, class => "chunk_header"},
2446                 { regexp => qr/^\\/,               class => "incomplete"  },
2447                 { regexp => qr/^ {$num_sign}/,     class => "ctx" },
2448                 # classifier for context must come before classifier add/rem,
2449                 # or we would have to use more complicated regexp, for example
2450                 # qr/(?= {0,$m}\+)[+ ]{$num_sign}/, where $m = $num_sign - 1;
2451                 { regexp => qr/^[+ ]{$num_sign}/,   class => "add" },
2452                 { regexp => qr/^[- ]{$num_sign}/,   class => "rem" },
2453         );
2454         for my $clsfy (@diff_line_classifier) {
2455                 return $clsfy->{'class'}
2456                         if ($line =~ $clsfy->{'regexp'});
2457         }
2458
2459         # fallback
2460         return "";
2461 }
2462
2463 # assumes that $from and $to are defined and correctly filled,
2464 # and that $line holds a line of chunk header for unified diff
2465 sub format_unidiff_chunk_header {
2466         my ($line, $from, $to) = @_;
2467
2468         my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2469                 $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2470
2471         $from_lines = 0 unless defined $from_lines;
2472         $to_lines   = 0 unless defined $to_lines;
2473
2474         if ($from->{'href'}) {
2475                 $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2476                                      -class=>"list"}, $from_text);
2477         }
2478         if ($to->{'href'}) {
2479                 $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2480                                      -class=>"list"}, $to_text);
2481         }
2482         $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2483                 "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2484         return $line;
2485 }
2486
2487 # assumes that $from and $to are defined and correctly filled,
2488 # and that $line holds a line of chunk header for combined diff
2489 sub format_cc_diff_chunk_header {
2490         my ($line, $from, $to) = @_;
2491
2492         my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2493         my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2494
2495         @from_text = split(' ', $ranges);
2496         for (my $i = 0; $i < @from_text; ++$i) {
2497                 ($from_start[$i], $from_nlines[$i]) =
2498                         (split(',', substr($from_text[$i], 1)), 0);
2499         }
2500
2501         $to_text   = pop @from_text;
2502         $to_start  = pop @from_start;
2503         $to_nlines = pop @from_nlines;
2504
2505         $line = "<span class=\"chunk_info\">$prefix ";
2506         for (my $i = 0; $i < @from_text; ++$i) {
2507                 if ($from->{'href'}[$i]) {
2508                         $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2509                                           -class=>"list"}, $from_text[$i]);
2510                 } else {
2511                         $line .= $from_text[$i];
2512                 }
2513                 $line .= " ";
2514         }
2515         if ($to->{'href'}) {
2516                 $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2517                                   -class=>"list"}, $to_text);
2518         } else {
2519                 $line .= $to_text;
2520         }
2521         $line .= " $prefix</span>" .
2522                  "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2523         return $line;
2524 }
2525
2526 # process patch (diff) line (not to be used for diff headers),
2527 # returning HTML-formatted (but not wrapped) line.
2528 # If the line is passed as a reference, it is treated as HTML and not
2529 # esc_html()'ed.
2530 sub format_diff_line {
2531         my ($line, $diff_class, $from, $to) = @_;
2532
2533         if (ref($line)) {
2534                 $line = $$line;
2535         } else {
2536                 chomp $line;
2537                 $line = untabify($line);
2538
2539                 if ($from && $to && $line =~ m/^\@{2} /) {
2540                         $line = format_unidiff_chunk_header($line, $from, $to);
2541                 } elsif ($from && $to && $line =~ m/^\@{3}/) {
2542                         $line = format_cc_diff_chunk_header($line, $from, $to);
2543                 } else {
2544                         $line = esc_html($line, -nbsp=>1);
2545                 }
2546         }
2547
2548         my $diff_classes = "diff";
2549         $diff_classes .= " $diff_class" if ($diff_class);
2550         $line = "<div class=\"$diff_classes\">$line</div>\n";
2551
2552         return $line;
2553 }
2554
2555 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2556 # linked.  Pass the hash of the tree/commit to snapshot.
2557 sub format_snapshot_links {
2558         my ($hash) = @_;
2559         my $num_fmts = @snapshot_fmts;
2560         if ($num_fmts > 1) {
2561                 # A parenthesized list of links bearing format names.
2562                 # e.g. "snapshot (_tar.gz_ _zip_)"
2563                 return "snapshot (" . join(' ', map
2564                         $cgi->a({
2565                                 -href => href(
2566                                         action=>"snapshot",
2567                                         hash=>$hash,
2568                                         snapshot_format=>$_
2569                                 )
2570                         }, $known_snapshot_formats{$_}{'display'})
2571                 , @snapshot_fmts) . ")";
2572         } elsif ($num_fmts == 1) {
2573                 # A single "snapshot" link whose tooltip bears the format name.
2574                 # i.e. "_snapshot_"
2575                 my ($fmt) = @snapshot_fmts;
2576                 return
2577                         $cgi->a({
2578                                 -href => href(
2579                                         action=>"snapshot",
2580                                         hash=>$hash,
2581                                         snapshot_format=>$fmt
2582                                 ),
2583                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2584                         }, "snapshot");
2585         } else { # $num_fmts == 0
2586                 return undef;
2587         }
2588 }
2589
2590 ## ......................................................................
2591 ## functions returning values to be passed, perhaps after some
2592 ## transformation, to other functions; e.g. returning arguments to href()
2593
2594 # returns hash to be passed to href to generate gitweb URL
2595 # in -title key it returns description of link
2596 sub get_feed_info {
2597         my $format = shift || 'Atom';
2598         my %res = (action => lc($format));
2599         my $matched_ref = 0;
2600
2601         # feed links are possible only for project views
2602         return unless (defined $project);
2603         # some views should link to OPML, or to generic project feed,
2604         # or don't have specific feed yet (so they should use generic)
2605         return if (!$action || $action =~ /^(?:tags|heads|forks|tag|search)$/x);
2606
2607         my $branch = undef;
2608         # branches refs uses 'refs/' + $get_branch_refs()[x] + '/' prefix
2609         # (fullname) to differentiate from tag links; this also makes
2610         # possible to detect branch links
2611         for my $ref (get_branch_refs()) {
2612                 if ((defined $hash_base && $hash_base =~ m!^refs/\Q$ref\E/(.*)$!) ||
2613                     (defined $hash      && $hash      =~ m!^refs/\Q$ref\E/(.*)$!)) {
2614                         $branch = $1;
2615                         $matched_ref = $ref;
2616                         last;
2617                 }
2618         }
2619         # find log type for feed description (title)
2620         my $type = 'log';
2621         if (defined $file_name) {
2622                 $type  = "history of $file_name";
2623                 $type .= "/" if ($action eq 'tree');
2624                 $type .= " on '$branch'" if (defined $branch);
2625         } else {
2626                 $type = "log of $branch" if (defined $branch);
2627         }
2628
2629         $res{-title} = $type;
2630         $res{'hash'} = (defined $branch ? "refs/$matched_ref/$branch" : undef);
2631         $res{'file_name'} = $file_name;
2632
2633         return %res;
2634 }
2635
2636 ## ----------------------------------------------------------------------
2637 ## git utility subroutines, invoking git commands
2638
2639 # returns path to the core git executable and the --git-dir parameter as list
2640 sub git_cmd {
2641         $number_of_git_cmds++;
2642         return $GIT, '--git-dir='.$git_dir;
2643 }
2644
2645 # quote the given arguments for passing them to the shell
2646 # quote_command("command", "arg 1", "arg with ' and ! characters")
2647 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2648 # Try to avoid using this function wherever possible.
2649 sub quote_command {
2650         return join(' ',
2651                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2652 }
2653
2654 # get HEAD ref of given project as hash
2655 sub git_get_head_hash {
2656         return git_get_full_hash(shift, 'HEAD');
2657 }
2658
2659 sub git_get_full_hash {
2660         return git_get_hash(@_);
2661 }
2662
2663 sub git_get_short_hash {
2664         return git_get_hash(@_, '--short=7');
2665 }
2666
2667 sub git_get_hash {
2668         my ($project, $hash, @options) = @_;
2669         my $o_git_dir = $git_dir;
2670         my $retval = undef;
2671         $git_dir = "$projectroot/$project";
2672         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2673             '--verify', '-q', @options, $hash) {
2674                 $retval = <$fd>;
2675                 chomp $retval if defined $retval;
2676                 close $fd;
2677         }
2678         if (defined $o_git_dir) {
2679                 $git_dir = $o_git_dir;
2680         }
2681         return $retval;
2682 }
2683
2684 # get type of given object
2685 sub git_get_type {
2686         my $hash = shift;
2687
2688         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2689         my $type = <$fd>;
2690         close $fd or return;
2691         chomp $type;
2692         return $type;
2693 }
2694
2695 # repository configuration
2696 our $config_file = '';
2697 our %config;
2698
2699 # store multiple values for single key as anonymous array reference
2700 # single values stored directly in the hash, not as [ <value> ]
2701 sub hash_set_multi {
2702         my ($hash, $key, $value) = @_;
2703
2704         if (!exists $hash->{$key}) {
2705                 $hash->{$key} = $value;
2706         } elsif (!ref $hash->{$key}) {
2707                 $hash->{$key} = [ $hash->{$key}, $value ];
2708         } else {
2709                 push @{$hash->{$key}}, $value;
2710         }
2711 }
2712
2713 # return hash of git project configuration
2714 # optionally limited to some section, e.g. 'gitweb'
2715 sub git_parse_project_config {
2716         my $section_regexp = shift;
2717         my %config;
2718
2719         local $/ = "\0";
2720
2721         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2722                 or return;
2723
2724         while (my $keyval = <$fh>) {
2725                 chomp $keyval;
2726                 my ($key, $value) = split(/\n/, $keyval, 2);
2727
2728                 hash_set_multi(\%config, $key, $value)
2729                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2730         }
2731         close $fh;
2732
2733         return %config;
2734 }
2735
2736 # convert config value to boolean: 'true' or 'false'
2737 # no value, number > 0, 'true' and 'yes' values are true
2738 # rest of values are treated as false (never as error)
2739 sub config_to_bool {
2740         my $val = shift;
2741
2742         return 1 if !defined $val;             # section.key
2743
2744         # strip leading and trailing whitespace
2745         $val =~ s/^\s+//;
2746         $val =~ s/\s+$//;
2747
2748         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2749                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2750 }
2751
2752 # convert config value to simple decimal number
2753 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2754 # to be multiplied by 1024, 1048576, or 1073741824
2755 sub config_to_int {
2756         my $val = shift;
2757
2758         # strip leading and trailing whitespace
2759         $val =~ s/^\s+//;
2760         $val =~ s/\s+$//;
2761
2762         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2763                 $unit = lc($unit);
2764                 # unknown unit is treated as 1
2765                 return $num * ($unit eq 'g' ? 1073741824 :
2766                                $unit eq 'm' ?    1048576 :
2767                                $unit eq 'k' ?       1024 : 1);
2768         }
2769         return $val;
2770 }
2771
2772 # convert config value to array reference, if needed
2773 sub config_to_multi {
2774         my $val = shift;
2775
2776         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2777 }
2778
2779 sub git_get_project_config {
2780         my ($key, $type) = @_;
2781
2782         return unless defined $git_dir;
2783
2784         # key sanity check
2785         return unless ($key);
2786         # only subsection, if exists, is case sensitive,
2787         # and not lowercased by 'git config -z -l'
2788         if (my ($hi, $mi, $lo) = ($key =~ /^([^.]*)\.(.*)\.([^.]*)$/)) {
2789                 $lo =~ s/_//g;
2790                 $key = join(".", lc($hi), $mi, lc($lo));
2791                 return if ($lo =~ /\W/ || $hi =~ /\W/);
2792         } else {
2793                 $key = lc($key);
2794                 $key =~ s/_//g;
2795                 return if ($key =~ /\W/);
2796         }
2797         $key =~ s/^gitweb\.//;
2798
2799         # type sanity check
2800         if (defined $type) {
2801                 $type =~ s/^--//;
2802                 $type = undef
2803                         unless ($type eq 'bool' || $type eq 'int');
2804         }
2805
2806         # get config
2807         if (!defined $config_file ||
2808             $config_file ne "$git_dir/config") {
2809                 %config = git_parse_project_config('gitweb');
2810                 $config_file = "$git_dir/config";
2811         }
2812
2813         # check if config variable (key) exists
2814         return unless exists $config{"gitweb.$key"};
2815
2816         # ensure given type
2817         if (!defined $type) {
2818                 return $config{"gitweb.$key"};
2819         } elsif ($type eq 'bool') {
2820                 # backward compatibility: 'git config --bool' returns true/false
2821                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2822         } elsif ($type eq 'int') {
2823                 return config_to_int($config{"gitweb.$key"});
2824         }
2825         return $config{"gitweb.$key"};
2826 }
2827
2828 # get hash of given path at given ref
2829 sub git_get_hash_by_path {
2830         my $base = shift;
2831         my $path = shift || return undef;
2832         my $type = shift;
2833
2834         $path =~ s,/+$,,;
2835
2836         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2837                 or die_error(500, "Open git-ls-tree failed");
2838         my $line = <$fd>;
2839         close $fd or return undef;
2840
2841         if (!defined $line) {
2842                 # there is no tree or hash given by $path at $base
2843                 return undef;
2844         }
2845
2846         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2847         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2848         if (defined $type && $type ne $2) {
2849                 # type doesn't match
2850                 return undef;
2851         }
2852         return $3;
2853 }
2854
2855 # get path of entry with given hash at given tree-ish (ref)
2856 # used to get 'from' filename for combined diff (merge commit) for renames
2857 sub git_get_path_by_hash {
2858         my $base = shift || return;
2859         my $hash = shift || return;
2860
2861         local $/ = "\0";
2862
2863         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2864                 or return undef;
2865         while (my $line = <$fd>) {
2866                 chomp $line;
2867
2868                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2869                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2870                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2871                         close $fd;
2872                         return $1;
2873                 }
2874         }
2875         close $fd;
2876         return undef;
2877 }
2878
2879 ## ......................................................................
2880 ## git utility functions, directly accessing git repository
2881
2882 # get the value of config variable either from file named as the variable
2883 # itself in the repository ($GIT_DIR/$name file), or from gitweb.$name
2884 # configuration variable in the repository config file.
2885 sub git_get_file_or_project_config {
2886         my ($path, $name) = @_;
2887
2888         $git_dir = "$projectroot/$path";
2889         open my $fd, '<', "$git_dir/$name"
2890                 or return git_get_project_config($name);
2891         my $conf = <$fd>;
2892         close $fd;
2893         if (defined $conf) {
2894                 chomp $conf;
2895         }
2896         return $conf;
2897 }
2898
2899 sub git_get_project_description {
2900         my $path = shift;
2901         return git_get_file_or_project_config($path, 'description');
2902 }
2903
2904 sub git_get_project_category {
2905         my $path = shift;
2906         return git_get_file_or_project_config($path, 'category');
2907 }
2908
2909
2910 # supported formats:
2911 # * $GIT_DIR/ctags/<tagname> file (in 'ctags' subdirectory)
2912 #   - if its contents is a number, use it as tag weight,
2913 #   - otherwise add a tag with weight 1
2914 # * $GIT_DIR/ctags file, each line is a tag (with weight 1)
2915 #   the same value multiple times increases tag weight
2916 # * `gitweb.ctag' multi-valued repo config variable
2917 sub git_get_project_ctags {
2918         my $project = shift;
2919         my $ctags = {};
2920
2921         $git_dir = "$projectroot/$project";
2922         if (opendir my $dh, "$git_dir/ctags") {
2923                 my @files = grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh);
2924                 foreach my $tagfile (@files) {
2925                         open my $ct, '<', $tagfile
2926                                 or next;
2927                         my $val = <$ct>;
2928                         chomp $val if $val;
2929                         close $ct;
2930
2931                         (my $ctag = $tagfile) =~ s#.*/##;
2932                         if ($val =~ /^\d+$/) {
2933                                 $ctags->{$ctag} = $val;
2934                         } else {
2935                                 $ctags->{$ctag} = 1;
2936                         }
2937                 }
2938                 closedir $dh;
2939
2940         } elsif (open my $fh, '<', "$git_dir/ctags") {
2941                 while (my $line = <$fh>) {
2942                         chomp $line;
2943                         $ctags->{$line}++ if $line;
2944                 }
2945                 close $fh;
2946
2947         } else {
2948                 my $taglist = config_to_multi(git_get_project_config('ctag'));
2949                 foreach my $tag (@$taglist) {
2950                         $ctags->{$tag}++;
2951                 }
2952         }
2953
2954         return $ctags;
2955 }
2956
2957 # return hash, where keys are content tags ('ctags'),
2958 # and values are sum of weights of given tag in every project
2959 sub git_gather_all_ctags {
2960         my $projects = shift;
2961         my $ctags = {};
2962
2963         foreach my $p (@$projects) {
2964                 foreach my $ct (keys %{$p->{'ctags'}}) {
2965                         $ctags->{$ct} += $p->{'ctags'}->{$ct};
2966                 }
2967         }
2968
2969         return $ctags;
2970 }
2971
2972 sub git_populate_project_tagcloud {
2973         my $ctags = shift;
2974
2975         # First, merge different-cased tags; tags vote on casing
2976         my %ctags_lc;
2977         foreach (keys %$ctags) {
2978                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2979                 if (not $ctags_lc{lc $_}->{topcount}
2980                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2981                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2982                         $ctags_lc{lc $_}->{topname} = $_;
2983                 }
2984         }
2985
2986         my $cloud;
2987         my $matched = $input_params{'ctag'};
2988         if (eval { require HTML::TagCloud; 1; }) {
2989                 $cloud = HTML::TagCloud->new;
2990                 foreach my $ctag (sort keys %ctags_lc) {
2991                         # Pad the title with spaces so that the cloud looks
2992                         # less crammed.
2993                         my $title = esc_html($ctags_lc{$ctag}->{topname});
2994                         $title =~ s/ /&nbsp;/g;
2995                         $title =~ s/^/&nbsp;/g;
2996                         $title =~ s/$/&nbsp;/g;
2997                         if (defined $matched && $matched eq $ctag) {
2998                                 $title = qq(<span class="match">$title</span>);
2999                         }
3000                         $cloud->add($title, href(project=>undef, ctag=>$ctag),
3001                                     $ctags_lc{$ctag}->{count});
3002                 }
3003         } else {
3004                 $cloud = {};
3005                 foreach my $ctag (keys %ctags_lc) {
3006                         my $title = esc_html($ctags_lc{$ctag}->{topname}, -nbsp=>1);
3007                         if (defined $matched && $matched eq $ctag) {
3008                                 $title = qq(<span class="match">$title</span>);
3009                         }
3010                         $cloud->{$ctag}{count} = $ctags_lc{$ctag}->{count};
3011                         $cloud->{$ctag}{ctag} =
3012                                 $cgi->a({-href=>href(project=>undef, ctag=>$ctag)}, $title);
3013                 }
3014         }
3015         return $cloud;
3016 }
3017
3018 sub git_show_project_tagcloud {
3019         my ($cloud, $count) = @_;
3020         if (ref $cloud eq 'HTML::TagCloud') {
3021                 return $cloud->html_and_css($count);
3022         } else {
3023                 my @tags = sort { $cloud->{$a}->{'count'} <=> $cloud->{$b}->{'count'} } keys %$cloud;
3024                 return
3025                         '<div id="htmltagcloud"'.($project ? '' : ' align="center"').'>' .
3026                         join (', ', map {
3027                                 $cloud->{$_}->{'ctag'}
3028                         } splice(@tags, 0, $count)) .
3029                         '</div>';
3030         }
3031 }
3032
3033 sub git_get_project_url_list {
3034         my $path = shift;
3035
3036         $git_dir = "$projectroot/$path";
3037         open my $fd, '<', "$git_dir/cloneurl"
3038                 or return wantarray ?
3039                 @{ config_to_multi(git_get_project_config('url')) } :
3040                    config_to_multi(git_get_project_config('url'));
3041         my @git_project_url_list = map { chomp; $_ } <$fd>;
3042         close $fd;
3043
3044         return wantarray ? @git_project_url_list : \@git_project_url_list;
3045 }
3046
3047 sub git_get_projects_list {
3048         my $filter = shift || '';
3049         my $paranoid = shift;
3050         my @list;
3051
3052         if (-d $projects_list) {
3053                 # search in directory
3054                 my $dir = $projects_list;
3055                 # remove the trailing "/"
3056                 $dir =~ s!/+$!!;
3057                 my $pfxlen = length("$dir");
3058                 my $pfxdepth = ($dir =~ tr!/!!);
3059                 # when filtering, search only given subdirectory
3060                 if ($filter && !$paranoid) {
3061                         $dir .= "/$filter";
3062                         $dir =~ s!/+$!!;
3063                 }
3064
3065                 File::Find::find({
3066                         follow_fast => 1, # follow symbolic links
3067                         follow_skip => 2, # ignore duplicates
3068                         dangling_symlinks => 0, # ignore dangling symlinks, silently
3069                         wanted => sub {
3070                                 # global variables
3071                                 our $project_maxdepth;
3072                                 our $projectroot;
3073                                 # skip project-list toplevel, if we get it.
3074                                 return if (m!^[/.]$!);
3075                                 # only directories can be git repositories
3076                                 return unless (-d $_);
3077                                 # need search permission
3078                                 return unless (-x $_);
3079                                 # don't traverse too deep (Find is super slow on os x)
3080                                 # $project_maxdepth excludes depth of $projectroot
3081                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
3082                                         $File::Find::prune = 1;
3083                                         return;
3084                                 }
3085
3086                                 my $path = substr($File::Find::name, $pfxlen + 1);
3087                                 # paranoidly only filter here
3088                                 if ($paranoid && $filter && $path !~ m!^\Q$filter\E/!) {
3089                                         next;
3090                                 }
3091                                 # we check related file in $projectroot
3092                                 if (check_export_ok("$projectroot/$path")) {
3093                                         push @list, { path => $path };
3094                                         $File::Find::prune = 1;
3095                                 }
3096                         },
3097                 }, "$dir");
3098
3099         } elsif (-f $projects_list) {
3100                 # read from file(url-encoded):
3101                 # 'git%2Fgit.git Linus+Torvalds'
3102                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3103                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3104                 open my $fd, '<', $projects_list or return;
3105         PROJECT:
3106                 while (my $line = <$fd>) {
3107                         chomp $line;
3108                         my ($path, $owner) = split ' ', $line;
3109                         $path = unescape($path);
3110                         $owner = unescape($owner);
3111                         if (!defined $path) {
3112                                 next;
3113                         }
3114                         # if $filter is rpovided, check if $path begins with $filter
3115                         if ($filter && $path !~ m!^\Q$filter\E/!) {
3116                                 next;
3117                         }
3118                         if (check_export_ok("$projectroot/$path")) {
3119                                 my $pr = {
3120                                         path => $path
3121                                 };
3122                                 if ($owner) {
3123                                         $pr->{'owner'} = to_utf8($owner);
3124                                 }
3125                                 push @list, $pr;
3126                         }
3127                 }
3128                 close $fd;
3129         }
3130         return @list;
3131 }
3132
3133 # written with help of Tree::Trie module (Perl Artistic License, GPL compatible)
3134 # as side effects it sets 'forks' field to list of forks for forked projects
3135 sub filter_forks_from_projects_list {
3136         my $projects = shift;
3137
3138         my %trie; # prefix tree of directories (path components)
3139         # generate trie out of those directories that might contain forks
3140         foreach my $pr (@$projects) {
3141                 my $path = $pr->{'path'};
3142                 $path =~ s/\.git$//;      # forks of 'repo.git' are in 'repo/' directory
3143                 next if ($path =~ m!/$!); # skip non-bare repositories, e.g. 'repo/.git'
3144                 next unless ($path);      # skip '.git' repository: tests, git-instaweb
3145                 next unless (-d "$projectroot/$path"); # containing directory exists
3146                 $pr->{'forks'} = [];      # there can be 0 or more forks of project
3147
3148                 # add to trie
3149                 my @dirs = split('/', $path);
3150                 # walk the trie, until either runs out of components or out of trie
3151                 my $ref = \%trie;
3152                 while (scalar @dirs &&
3153                        exists($ref->{$dirs[0]})) {
3154                         $ref = $ref->{shift @dirs};
3155                 }
3156                 # create rest of trie structure from rest of components
3157                 foreach my $dir (@dirs) {
3158                         $ref = $ref->{$dir} = {};
3159                 }
3160                 # create end marker, store $pr as a data
3161                 $ref->{''} = $pr if (!exists $ref->{''});
3162         }
3163
3164         # filter out forks, by finding shortest prefix match for paths
3165         my @filtered;
3166  PROJECT:
3167         foreach my $pr (@$projects) {
3168                 # trie lookup
3169                 my $ref = \%trie;
3170         DIR:
3171                 foreach my $dir (split('/', $pr->{'path'})) {
3172                         if (exists $ref->{''}) {
3173                                 # found [shortest] prefix, is a fork - skip it
3174                                 push @{$ref->{''}{'forks'}}, $pr;
3175                                 next PROJECT;
3176                         }
3177                         if (!exists $ref->{$dir}) {
3178                                 # not in trie, cannot have prefix, not a fork
3179                                 push @filtered, $pr;
3180                                 next PROJECT;
3181                         }
3182                         # If the dir is there, we just walk one step down the trie.
3183                         $ref = $ref->{$dir};
3184                 }
3185                 # we ran out of trie
3186                 # (shouldn't happen: it's either no match, or end marker)
3187                 push @filtered, $pr;
3188         }
3189
3190         return @filtered;
3191 }
3192
3193 # note: fill_project_list_info must be run first,
3194 # for 'descr_long' and 'ctags' to be filled
3195 sub search_projects_list {
3196         my ($projlist, %opts) = @_;
3197         my $tagfilter  = $opts{'tagfilter'};
3198         my $search_re = $opts{'search_regexp'};
3199
3200         return @$projlist
3201                 unless ($tagfilter || $search_re);
3202
3203         # searching projects require filling to be run before it;
3204         fill_project_list_info($projlist,
3205                                $tagfilter  ? 'ctags' : (),
3206                                $search_re ? ('path', 'descr') : ());
3207         my @projects;
3208  PROJECT:
3209         foreach my $pr (@$projlist) {
3210
3211                 if ($tagfilter) {
3212                         next unless ref($pr->{'ctags'}) eq 'HASH';
3213                         next unless
3214                                 grep { lc($_) eq lc($tagfilter) } keys %{$pr->{'ctags'}};
3215                 }
3216
3217                 if ($search_re) {
3218                         next unless
3219                                 $pr->{'path'} =~ /$search_re/ ||
3220                                 $pr->{'descr_long'} =~ /$search_re/;
3221                 }
3222
3223                 push @projects, $pr;
3224         }
3225
3226         return @projects;
3227 }
3228
3229 our $gitweb_project_owner = undef;
3230 sub git_get_project_list_from_file {
3231
3232         return if (defined $gitweb_project_owner);
3233
3234         $gitweb_project_owner = {};
3235         # read from file (url-encoded):
3236         # 'git%2Fgit.git Linus+Torvalds'
3237         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
3238         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
3239         if (-f $projects_list) {
3240                 open(my $fd, '<', $projects_list);
3241                 while (my $line = <$fd>) {
3242                         chomp $line;
3243                         my ($pr, $ow) = split ' ', $line;
3244                         $pr = unescape($pr);
3245                         $ow = unescape($ow);
3246                         $gitweb_project_owner->{$pr} = to_utf8($ow);
3247                 }
3248                 close $fd;
3249         }
3250 }
3251
3252 sub git_get_project_owner {
3253         my $project = shift;
3254         my $owner;
3255
3256         return undef unless $project;
3257         $git_dir = "$projectroot/$project";
3258
3259         if (!defined $gitweb_project_owner) {
3260                 git_get_project_list_from_file();
3261         }
3262
3263         if (exists $gitweb_project_owner->{$project}) {
3264                 $owner = $gitweb_project_owner->{$project};
3265         }
3266         if (!defined $owner){
3267                 $owner = git_get_project_config('owner');
3268         }
3269         if (!defined $owner) {
3270                 $owner = get_file_owner("$git_dir");
3271         }
3272
3273         return $owner;
3274 }
3275
3276 sub git_get_last_activity {
3277         my ($path) = @_;
3278         my $fd;
3279
3280         $git_dir = "$projectroot/$path";
3281         open($fd, "-|", git_cmd(), 'for-each-ref',
3282              '--format=%(committer)',
3283              '--sort=-committerdate',
3284              '--count=1',
3285              map { "refs/$_" } get_branch_refs ()) or return;
3286         my $most_recent = <$fd>;
3287         close $fd or return;
3288         if (defined $most_recent &&
3289             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
3290                 my $timestamp = $1;
3291                 my $age = time - $timestamp;
3292                 return ($age, age_string($age));
3293         }
3294         return (undef, undef);
3295 }
3296
3297 # Implementation note: when a single remote is wanted, we cannot use 'git
3298 # remote show -n' because that command always work (assuming it's a remote URL
3299 # if it's not defined), and we cannot use 'git remote show' because that would
3300 # try to make a network roundtrip. So the only way to find if that particular
3301 # remote is defined is to walk the list provided by 'git remote -v' and stop if
3302 # and when we find what we want.
3303 sub git_get_remotes_list {
3304         my $wanted = shift;
3305         my %remotes = ();
3306
3307         open my $fd, '-|' , git_cmd(), 'remote', '-v';
3308         return unless $fd;
3309         while (my $remote = <$fd>) {
3310                 chomp $remote;
3311                 $remote =~ s!\t(.*?)\s+\((\w+)\)$!!;
3312                 next if $wanted and not $remote eq $wanted;
3313                 my ($url, $key) = ($1, $2);
3314
3315                 $remotes{$remote} ||= { 'heads' => () };
3316                 $remotes{$remote}{$key} = $url;
3317         }
3318         close $fd or return;
3319         return wantarray ? %remotes : \%remotes;
3320 }
3321
3322 # Takes a hash of remotes as first parameter and fills it by adding the
3323 # available remote heads for each of the indicated remotes.
3324 sub fill_remote_heads {
3325         my $remotes = shift;
3326         my @heads = map { "remotes/$_" } keys %$remotes;
3327         my @remoteheads = git_get_heads_list(undef, @heads);
3328         foreach my $remote (keys %$remotes) {
3329                 $remotes->{$remote}{'heads'} = [ grep {
3330                         $_->{'name'} =~ s!^$remote/!!
3331                         } @remoteheads ];
3332         }
3333 }
3334
3335 sub git_get_references {
3336         my $type = shift || "";
3337         my %refs;
3338         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
3339         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
3340         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
3341                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
3342                 or return;
3343
3344         while (my $line = <$fd>) {
3345                 chomp $line;
3346                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
3347                         if (defined $refs{$1}) {
3348                                 push @{$refs{$1}}, $2;
3349                         } else {
3350                                 $refs{$1} = [ $2 ];
3351                         }
3352                 }
3353         }
3354         close $fd or return;
3355         return \%refs;
3356 }
3357
3358 sub git_get_rev_name_tags {
3359         my $hash = shift || return undef;
3360
3361         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
3362                 or return;
3363         my $name_rev = <$fd>;
3364         close $fd;
3365
3366         if ($name_rev =~ m|^$hash tags/(.*)$|) {
3367                 return $1;
3368         } else {
3369                 # catches also '$hash undefined' output
3370                 return undef;
3371         }
3372 }
3373
3374 ## ----------------------------------------------------------------------
3375 ## parse to hash functions
3376
3377 sub parse_date {
3378         my $epoch = shift;
3379         my $tz = shift || "-0000";
3380
3381         my %date;
3382         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
3383         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
3384         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
3385         $date{'hour'} = $hour;
3386         $date{'minute'} = $min;
3387         $date{'mday'} = $mday;
3388         $date{'day'} = $days[$wday];
3389         $date{'month'} = $months[$mon];
3390         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
3391                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
3392         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
3393                              $mday, $months[$mon], $hour ,$min;
3394         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
3395                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
3396
3397         my ($tz_sign, $tz_hour, $tz_min) =
3398                 ($tz =~ m/^([-+])(\d\d)(\d\d)$/);
3399         $tz_sign = ($tz_sign eq '-' ? -1 : +1);
3400         my $local = $epoch + $tz_sign*((($tz_hour*60) + $tz_min)*60);
3401         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
3402         $date{'hour_local'} = $hour;
3403         $date{'minute_local'} = $min;
3404         $date{'tz_local'} = $tz;
3405         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
3406                                   1900+$year, $mon+1, $mday,
3407                                   $hour, $min, $sec, $tz);
3408         return %date;
3409 }
3410
3411 sub parse_tag {
3412         my $tag_id = shift;
3413         my %tag;
3414         my @comment;
3415
3416         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
3417         $tag{'id'} = $tag_id;
3418         while (my $line = <$fd>) {
3419                 chomp $line;
3420                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
3421                         $tag{'object'} = $1;
3422                 } elsif ($line =~ m/^type (.+)$/) {
3423                         $tag{'type'} = $1;
3424                 } elsif ($line =~ m/^tag (.+)$/) {
3425                         $tag{'name'} = $1;
3426                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
3427                         $tag{'author'} = $1;
3428                         $tag{'author_epoch'} = $2;
3429                         $tag{'author_tz'} = $3;
3430                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3431                                 $tag{'author_name'}  = $1;
3432                                 $tag{'author_email'} = $2;
3433                         } else {
3434                                 $tag{'author_name'} = $tag{'author'};
3435                         }
3436                 } elsif ($line =~ m/--BEGIN/) {
3437                         push @comment, $line;
3438                         last;
3439                 } elsif ($line eq "") {
3440                         last;
3441                 }
3442         }
3443         push @comment, <$fd>;
3444         $tag{'comment'} = \@comment;
3445         close $fd or return;
3446         if (!defined $tag{'name'}) {
3447                 return
3448         };
3449         return %tag
3450 }
3451
3452 sub parse_commit_text {
3453         my ($commit_text, $withparents) = @_;
3454         my @commit_lines = split '\n', $commit_text;
3455         my %co;
3456
3457         pop @commit_lines; # Remove '\0'
3458
3459         if (! @commit_lines) {
3460                 return;
3461         }
3462
3463         my $header = shift @commit_lines;
3464         if ($header !~ m/^[0-9a-fA-F]{40}/) {
3465                 return;
3466         }
3467         ($co{'id'}, my @parents) = split ' ', $header;
3468         while (my $line = shift @commit_lines) {
3469                 last if $line eq "\n";
3470                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
3471                         $co{'tree'} = $1;
3472                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
3473                         push @parents, $1;
3474                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
3475                         $co{'author'} = to_utf8($1);
3476                         $co{'author_epoch'} = $2;
3477                         $co{'author_tz'} = $3;
3478                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
3479                                 $co{'author_name'}  = $1;
3480                                 $co{'author_email'} = $2;
3481                         } else {
3482                                 $co{'author_name'} = $co{'author'};
3483                         }
3484                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
3485                         $co{'committer'} = to_utf8($1);
3486                         $co{'committer_epoch'} = $2;
3487                         $co{'committer_tz'} = $3;
3488                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
3489                                 $co{'committer_name'}  = $1;
3490                                 $co{'committer_email'} = $2;
3491                         } else {
3492                                 $co{'committer_name'} = $co{'committer'};
3493                         }
3494                 }
3495         }
3496         if (!defined $co{'tree'}) {
3497                 return;
3498         };
3499         $co{'parents'} = \@parents;
3500         $co{'parent'} = $parents[0];
3501
3502         foreach my $title (@commit_lines) {
3503                 $title =~ s/^    //;
3504                 if ($title ne "") {
3505                         $co{'title'} = chop_str($title, 80, 5);
3506                         # remove leading stuff of merges to make the interesting part visible
3507                         if (length($title) > 50) {
3508                                 $title =~ s/^Automatic //;
3509                                 $title =~ s/^merge (of|with) /Merge ... /i;
3510                                 if (length($title) > 50) {
3511                                         $title =~ s/(http|rsync):\/\///;
3512                                 }
3513                                 if (length($title) > 50) {
3514                                         $title =~ s/(master|www|rsync)\.//;
3515                                 }
3516                                 if (length($title) > 50) {
3517                                         $title =~ s/kernel.org:?//;
3518                                 }
3519                                 if (length($title) > 50) {
3520                                         $title =~ s/\/pub\/scm//;
3521                                 }
3522                         }
3523                         $co{'title_short'} = chop_str($title, 50, 5);
3524                         last;
3525                 }
3526         }
3527         if (! defined $co{'title'} || $co{'title'} eq "") {
3528                 $co{'title'} = $co{'title_short'} = '(no commit message)';
3529         }
3530         # remove added spaces
3531         foreach my $line (@commit_lines) {
3532                 $line =~ s/^    //;
3533         }
3534         $co{'comment'} = \@commit_lines;
3535
3536         my $age = time - $co{'committer_epoch'};
3537         $co{'age'} = $age;
3538         $co{'age_string'} = age_string($age);
3539         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
3540         if ($age > 60*60*24*7*2) {
3541                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3542                 $co{'age_string_age'} = $co{'age_string'};
3543         } else {
3544                 $co{'age_string_date'} = $co{'age_string'};
3545                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
3546         }
3547         return %co;
3548 }
3549
3550 sub parse_commit {
3551         my ($commit_id) = @_;
3552         my %co;
3553
3554         local $/ = "\0";
3555
3556         open my $fd, "-|", git_cmd(), "rev-list",
3557                 "--parents",
3558                 "--header",
3559                 "--max-count=1",
3560                 $commit_id,
3561                 "--",
3562                 or die_error(500, "Open git-rev-list failed");
3563         %co = parse_commit_text(<$fd>, 1);
3564         close $fd;
3565
3566         return %co;
3567 }
3568
3569 sub parse_commits {
3570         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
3571         my @cos;
3572
3573         $maxcount ||= 1;
3574         $skip ||= 0;
3575
3576         local $/ = "\0";
3577
3578         open my $fd, "-|", git_cmd(), "rev-list",
3579                 "--header",
3580                 @args,
3581                 ("--max-count=" . $maxcount),
3582                 ("--skip=" . $skip),
3583                 @extra_options,
3584                 $commit_id,
3585                 "--",
3586                 ($filename ? ($filename) : ())
3587                 or die_error(500, "Open git-rev-list failed");
3588         while (my $line = <$fd>) {
3589                 my %co = parse_commit_text($line);
3590                 push @cos, \%co;
3591         }
3592         close $fd;
3593
3594         return wantarray ? @cos : \@cos;
3595 }
3596
3597 # parse line of git-diff-tree "raw" output
3598 sub parse_difftree_raw_line {
3599         my $line = shift;
3600         my %res;
3601
3602         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
3603         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
3604         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3605                 $res{'from_mode'} = $1;
3606                 $res{'to_mode'} = $2;
3607                 $res{'from_id'} = $3;
3608                 $res{'to_id'} = $4;
3609                 $res{'status'} = $5;
3610                 $res{'similarity'} = $6;
3611                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3612                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3613                 } else {
3614                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3615                 }
3616         }
3617         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3618         # combined diff (for merge commit)
3619         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3620                 $res{'nparents'}  = length($1);
3621                 $res{'from_mode'} = [ split(' ', $2) ];
3622                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3623                 $res{'from_id'} = [ split(' ', $3) ];
3624                 $res{'to_id'} = pop @{$res{'from_id'}};
3625                 $res{'status'} = [ split('', $4) ];
3626                 $res{'to_file'} = unquote($5);
3627         }
3628         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3629         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3630                 $res{'commit'} = $1;
3631         }
3632
3633         return wantarray ? %res : \%res;
3634 }
3635
3636 # wrapper: return parsed line of git-diff-tree "raw" output
3637 # (the argument might be raw line, or parsed info)
3638 sub parsed_difftree_line {
3639         my $line_or_ref = shift;
3640
3641         if (ref($line_or_ref) eq "HASH") {
3642                 # pre-parsed (or generated by hand)
3643                 return $line_or_ref;
3644         } else {
3645                 return parse_difftree_raw_line($line_or_ref);
3646         }
3647 }
3648
3649 # parse line of git-ls-tree output
3650 sub parse_ls_tree_line {
3651         my $line = shift;
3652         my %opts = @_;
3653         my %res;
3654
3655         if ($opts{'-l'}) {
3656                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3657                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3658
3659                 $res{'mode'} = $1;
3660                 $res{'type'} = $2;
3661                 $res{'hash'} = $3;
3662                 $res{'size'} = $4;
3663                 if ($opts{'-z'}) {
3664                         $res{'name'} = $5;
3665                 } else {
3666                         $res{'name'} = unquote($5);
3667                 }
3668         } else {
3669                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3670                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3671
3672                 $res{'mode'} = $1;
3673                 $res{'type'} = $2;
3674                 $res{'hash'} = $3;
3675                 if ($opts{'-z'}) {
3676                         $res{'name'} = $4;
3677                 } else {
3678                         $res{'name'} = unquote($4);
3679                 }
3680         }
3681
3682         return wantarray ? %res : \%res;
3683 }
3684
3685 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3686 sub parse_from_to_diffinfo {
3687         my ($diffinfo, $from, $to, @parents) = @_;
3688
3689         if ($diffinfo->{'nparents'}) {
3690                 # combined diff
3691                 $from->{'file'} = [];
3692                 $from->{'href'} = [];
3693                 fill_from_file_info($diffinfo, @parents)
3694                         unless exists $diffinfo->{'from_file'};
3695                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3696                         $from->{'file'}[$i] =
3697                                 defined $diffinfo->{'from_file'}[$i] ?
3698                                         $diffinfo->{'from_file'}[$i] :
3699                                         $diffinfo->{'to_file'};
3700                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3701                                 $from->{'href'}[$i] = href(action=>"blob",
3702                                                            hash_base=>$parents[$i],
3703                                                            hash=>$diffinfo->{'from_id'}[$i],
3704                                                            file_name=>$from->{'file'}[$i]);
3705                         } else {
3706                                 $from->{'href'}[$i] = undef;
3707                         }
3708                 }
3709         } else {
3710                 # ordinary (not combined) diff
3711                 $from->{'file'} = $diffinfo->{'from_file'};
3712                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3713                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3714                                                hash=>$diffinfo->{'from_id'},
3715                                                file_name=>$from->{'file'});
3716                 } else {
3717                         delete $from->{'href'};
3718                 }
3719         }
3720
3721         $to->{'file'} = $diffinfo->{'to_file'};
3722         if (!is_deleted($diffinfo)) { # file exists in result
3723                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3724                                      hash=>$diffinfo->{'to_id'},
3725                                      file_name=>$to->{'file'});
3726         } else {
3727                 delete $to->{'href'};
3728         }
3729 }
3730
3731 ## ......................................................................
3732 ## parse to array of hashes functions
3733
3734 sub git_get_heads_list {
3735         my ($limit, @classes) = @_;
3736         @classes = get_branch_refs() unless @classes;
3737         my @patterns = map { "refs/$_" } @classes;
3738         my @headslist;
3739
3740         open my $fd, '-|', git_cmd(), 'for-each-ref',
3741                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3742                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3743                 @patterns
3744                 or return;
3745         while (my $line = <$fd>) {
3746                 my %ref_item;
3747
3748                 chomp $line;
3749                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3750                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3751                 my ($committer, $epoch, $tz) =
3752                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3753                 $ref_item{'fullname'}  = $name;
3754                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
3755                 $name =~ s!^refs/($strip_refs|remotes)/!!;
3756                 $ref_item{'name'} = $name;
3757                 # for refs neither in 'heads' nor 'remotes' we want to
3758                 # show their ref dir
3759                 my $ref_dir = (defined $1) ? $1 : '';
3760                 if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
3761                     $ref_item{'name'} .= ' (' . $ref_dir . ')';
3762                 }
3763
3764                 $ref_item{'id'}    = $hash;
3765                 $ref_item{'title'} = $title || '(no commit message)';
3766                 $ref_item{'epoch'} = $epoch;
3767                 if ($epoch) {
3768                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3769                 } else {
3770                         $ref_item{'age'} = "unknown";
3771                 }
3772
3773                 push @headslist, \%ref_item;
3774         }
3775         close $fd;
3776
3777         return wantarray ? @headslist : \@headslist;
3778 }
3779
3780 sub git_get_tags_list {
3781         my $limit = shift;
3782         my @tagslist;
3783
3784         open my $fd, '-|', git_cmd(), 'for-each-ref',
3785                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3786                 '--format=%(objectname) %(objecttype) %(refname) '.
3787                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3788                 'refs/tags'
3789                 or return;
3790         while (my $line = <$fd>) {
3791                 my %ref_item;
3792
3793                 chomp $line;
3794                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3795                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3796                 my ($creator, $epoch, $tz) =
3797                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3798                 $ref_item{'fullname'} = $name;
3799                 $name =~ s!^refs/tags/!!;
3800
3801                 $ref_item{'type'} = $type;
3802                 $ref_item{'id'} = $id;
3803                 $ref_item{'name'} = $name;
3804                 if ($type eq "tag") {
3805                         $ref_item{'subject'} = $title;
3806                         $ref_item{'reftype'} = $reftype;
3807                         $ref_item{'refid'}   = $refid;
3808                 } else {
3809                         $ref_item{'reftype'} = $type;
3810                         $ref_item{'refid'}   = $id;
3811                 }
3812
3813                 if ($type eq "tag" || $type eq "commit") {
3814                         $ref_item{'epoch'} = $epoch;
3815                         if ($epoch) {
3816                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3817                         } else {
3818                                 $ref_item{'age'} = "unknown";
3819                         }
3820                 }
3821
3822                 push @tagslist, \%ref_item;
3823         }
3824         close $fd;
3825
3826         return wantarray ? @tagslist : \@tagslist;
3827 }
3828
3829 ## ----------------------------------------------------------------------
3830 ## filesystem-related functions
3831
3832 sub get_file_owner {
3833         my $path = shift;
3834
3835         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3836         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3837         if (!defined $gcos) {
3838                 return undef;
3839         }
3840         my $owner = $gcos;
3841         $owner =~ s/[,;].*$//;
3842         return to_utf8($owner);
3843 }
3844
3845 # assume that file exists
3846 sub insert_file {
3847         my $filename = shift;
3848
3849         open my $fd, '<', $filename;
3850         print map { to_utf8($_) } <$fd>;
3851         close $fd;
3852 }
3853
3854 ## ......................................................................
3855 ## mimetype related functions
3856
3857 sub mimetype_guess_file {
3858         my $filename = shift;
3859         my $mimemap = shift;
3860         -r $mimemap or return undef;
3861
3862         my %mimemap;
3863         open(my $mh, '<', $mimemap) or return undef;
3864         while (<$mh>) {
3865                 next if m/^#/; # skip comments
3866                 my ($mimetype, @exts) = split(/\s+/);
3867                 foreach my $ext (@exts) {
3868                         $mimemap{$ext} = $mimetype;
3869                 }
3870         }
3871         close($mh);
3872
3873         $filename =~ /\.([^.]*)$/;
3874         return $mimemap{$1};
3875 }
3876
3877 sub mimetype_guess {
3878         my $filename = shift;
3879         my $mime;
3880         $filename =~ /\./ or return undef;
3881
3882         if ($mimetypes_file) {
3883                 my $file = $mimetypes_file;
3884                 if ($file !~ m!^/!) { # if it is relative path
3885                         # it is relative to project
3886                         $file = "$projectroot/$project/$file";
3887                 }
3888                 $mime = mimetype_guess_file($filename, $file);
3889         }
3890         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3891         return $mime;
3892 }
3893
3894 sub blob_mimetype {
3895         my $fd = shift;
3896         my $filename = shift;
3897
3898         if ($filename) {
3899                 my $mime = mimetype_guess($filename);
3900                 $mime and return $mime;
3901         }
3902
3903         # just in case
3904         return $default_blob_plain_mimetype unless $fd;
3905
3906         if (-T $fd) {
3907                 return 'text/plain';
3908         } elsif (! $filename) {
3909                 return 'application/octet-stream';
3910         } elsif ($filename =~ m/\.png$/i) {
3911                 return 'image/png';
3912         } elsif ($filename =~ m/\.gif$/i) {
3913                 return 'image/gif';
3914         } elsif ($filename =~ m/\.jpe?g$/i) {
3915                 return 'image/jpeg';
3916         } else {
3917                 return 'application/octet-stream';
3918         }
3919 }
3920
3921 sub blob_contenttype {
3922         my ($fd, $file_name, $type) = @_;
3923
3924         $type ||= blob_mimetype($fd, $file_name);
3925         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3926                 $type .= "; charset=$default_text_plain_charset";
3927         }
3928
3929         return $type;
3930 }
3931
3932 # guess file syntax for syntax highlighting; return undef if no highlighting
3933 # the name of syntax can (in the future) depend on syntax highlighter used
3934 sub guess_file_syntax {
3935         my ($highlight, $file_name) = @_;
3936         return undef unless ($highlight && defined $file_name);
3937         my $basename = basename($file_name, '.in');
3938         return $highlight_basename{$basename}
3939                 if exists $highlight_basename{$basename};
3940
3941         $basename =~ /\.([^.]*)$/;
3942         my $ext = $1 or return undef;
3943         return $highlight_ext{$ext}
3944                 if exists $highlight_ext{$ext};
3945
3946         return undef;
3947 }
3948
3949 # run highlighter and return FD of its output,
3950 # or return original FD if no highlighting
3951 sub run_highlighter {
3952         my ($fd, $highlight, $syntax) = @_;
3953         return $fd unless ($highlight);
3954
3955         close $fd;
3956         my $syntax_arg = (defined $syntax) ? "--syntax $syntax" : "--force";
3957         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3958                   quote_command($^X, '-CO', '-MEncode=decode,FB_DEFAULT', '-pse',
3959                     '$_ = decode($fe, $_, FB_DEFAULT) if !utf8::decode($_);',
3960                     '--', "-fe=$fallback_encoding")." | ".
3961                   quote_command($highlight_bin).
3962                   " --replace-tabs=8 --fragment $syntax_arg |"
3963                 or die_error(500, "Couldn't open file or run syntax highlighter");
3964         return $fd;
3965 }
3966
3967 ## ======================================================================
3968 ## functions printing HTML: header, footer, error page
3969
3970 sub get_page_title {
3971         my $title = to_utf8($site_name);
3972
3973         unless (defined $project) {
3974                 if (defined $project_filter) {
3975                         $title .= " - projects in '" . esc_path($project_filter) . "'";
3976                 }
3977                 return $title;
3978         }
3979         $title .= " - " . to_utf8($project);
3980
3981         return $title unless (defined $action);
3982         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3983
3984         return $title unless (defined $file_name);
3985         $title .= " - " . esc_path($file_name);
3986         if ($action eq "tree" && $file_name !~ m|/$|) {
3987                 $title .= "/";
3988         }
3989
3990         return $title;
3991 }
3992
3993 sub get_content_type_html {
3994         # require explicit support from the UA if we are to send the page as
3995         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3996         # we have to do this because MSIE sometimes globs '*/*', pretending to
3997         # support xhtml+xml but choking when it gets what it asked for.
3998         if (defined $cgi->http('HTTP_ACCEPT') &&
3999             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
4000             $cgi->Accept('application/xhtml+xml') != 0) {
4001                 return 'application/xhtml+xml';
4002         } else {
4003                 return 'text/html';
4004         }
4005 }
4006
4007 sub print_feed_meta {
4008         if (defined $project) {
4009                 my %href_params = get_feed_info();
4010                 if (!exists $href_params{'-title'}) {
4011                         $href_params{'-title'} = 'log';
4012                 }
4013
4014                 foreach my $format (qw(RSS Atom)) {
4015                         my $type = lc($format);
4016                         my %link_attr = (
4017                                 '-rel' => 'alternate',
4018                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
4019                                 '-type' => "application/$type+xml"
4020                         );
4021
4022                         $href_params{'extra_options'} = undef;
4023                         $href_params{'action'} = $type;
4024                         $link_attr{'-href'} = href(%href_params);
4025                         print "<link ".
4026                               "rel=\"$link_attr{'-rel'}\" ".
4027                               "title=\"$link_attr{'-title'}\" ".
4028                               "href=\"$link_attr{'-href'}\" ".
4029                               "type=\"$link_attr{'-type'}\" ".
4030                               "/>\n";
4031
4032                         $href_params{'extra_options'} = '--no-merges';
4033                         $link_attr{'-href'} = href(%href_params);
4034                         $link_attr{'-title'} .= ' (no merges)';
4035                         print "<link ".
4036                               "rel=\"$link_attr{'-rel'}\" ".
4037                               "title=\"$link_attr{'-title'}\" ".
4038                               "href=\"$link_attr{'-href'}\" ".
4039                               "type=\"$link_attr{'-type'}\" ".
4040                               "/>\n";
4041                 }
4042
4043         } else {
4044                 printf('<link rel="alternate" title="%s projects list" '.
4045                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
4046                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
4047                 printf('<link rel="alternate" title="%s projects feeds" '.
4048                        'href="%s" type="text/x-opml" />'."\n",
4049                        esc_attr($site_name), href(project=>undef, action=>"opml"));
4050         }
4051 }
4052
4053 sub print_header_links {
4054         my $status = shift;
4055
4056         # print out each stylesheet that exist, providing backwards capability
4057         # for those people who defined $stylesheet in a config file
4058         if (defined $stylesheet) {
4059                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4060         } else {
4061                 foreach my $stylesheet (@stylesheets) {
4062                         next unless $stylesheet;
4063                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
4064                 }
4065         }
4066         print_feed_meta()
4067                 if ($status eq '200 OK');
4068         if (defined $favicon) {
4069                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
4070         }
4071 }
4072
4073 sub print_nav_breadcrumbs_path {
4074         my $dirprefix = undef;
4075         while (my $part = shift) {
4076                 $dirprefix .= "/" if defined $dirprefix;
4077                 $dirprefix .= $part;
4078                 print $cgi->a({-href => href(project => undef,
4079                                              project_filter => $dirprefix,
4080                                              action => "project_list")},
4081                               esc_html($part)) . " / ";
4082         }
4083 }
4084
4085 sub print_nav_breadcrumbs {
4086         my %opts = @_;
4087
4088         for my $crumb (@extra_breadcrumbs, [ $home_link_str => $home_link ]) {
4089                 print $cgi->a({-href => esc_url($crumb->[1])}, $crumb->[0]) . " / ";
4090         }
4091         if (defined $project) {
4092                 my @dirname = split '/', $project;
4093                 my $projectbasename = pop @dirname;
4094                 print_nav_breadcrumbs_path(@dirname);
4095                 print $cgi->a({-href => href(action=>"summary")}, esc_html($projectbasename));
4096                 if (defined $action) {
4097                         my $action_print = $action ;
4098                         if (defined $opts{-action_extra}) {
4099                                 $action_print = $cgi->a({-href => href(action=>$action)},
4100                                         $action);
4101                         }
4102                         print " / $action_print";
4103                 }
4104                 if (defined $opts{-action_extra}) {
4105                         print " / $opts{-action_extra}";
4106                 }
4107                 print "\n";
4108         } elsif (defined $project_filter) {
4109                 print_nav_breadcrumbs_path(split '/', $project_filter);
4110         }
4111 }
4112
4113 sub print_search_form {
4114         if (!defined $searchtext) {
4115                 $searchtext = "";
4116         }
4117         my $search_hash;
4118         if (defined $hash_base) {
4119                 $search_hash = $hash_base;
4120         } elsif (defined $hash) {
4121                 $search_hash = $hash;
4122         } else {
4123                 $search_hash = "HEAD";
4124         }
4125         my $action = $my_uri;
4126         my $use_pathinfo = gitweb_check_feature('pathinfo');
4127         if ($use_pathinfo) {
4128                 $action .= "/".esc_url($project);
4129         }
4130         print $cgi->start_form(-method => "get", -action => $action) .
4131               "<div class=\"search\">\n" .
4132               (!$use_pathinfo &&
4133               $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
4134               $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
4135               $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
4136               $cgi->popup_menu(-name => 'st', -default => 'commit',
4137                                -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
4138               " " . $cgi->a({-href => href(action=>"search_help"),
4139                              -title => "search help" }, "?") . " search:\n",
4140               $cgi->textfield(-name => "s", -value => $searchtext, -override => 1) . "\n" .
4141               "<span title=\"Extended regular expression\">" .
4142               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
4143                              -checked => $search_use_regexp) .
4144               "</span>" .
4145               "</div>" .
4146               $cgi->end_form() . "\n";
4147 }
4148
4149 sub git_header_html {
4150         my $status = shift || "200 OK";
4151         my $expires = shift;
4152         my %opts = @_;
4153
4154         my $title = get_page_title();
4155         my $content_type = get_content_type_html();
4156         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
4157                            -status=> $status, -expires => $expires)
4158                 unless ($opts{'-no_http_header'});
4159         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
4160         print <<EOF;
4161 <?xml version="1.0" encoding="utf-8"?>
4162 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
4163 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
4164 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
4165 <!-- git core binaries version $git_version -->
4166 <head>
4167 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
4168 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
4169 <meta name="robots" content="index, nofollow"/>
4170 <title>$title</title>
4171 EOF
4172         # the stylesheet, favicon etc urls won't work correctly with path_info
4173         # unless we set the appropriate base URL
4174         if ($ENV{'PATH_INFO'}) {
4175                 print "<base href=\"".esc_url($base_url)."\" />\n";
4176         }
4177         print_header_links($status);
4178
4179         if (defined $site_html_head_string) {
4180                 print to_utf8($site_html_head_string);
4181         }
4182
4183         print "</head>\n" .
4184               "<body>\n";
4185
4186         if (defined $site_header && -f $site_header) {
4187                 insert_file($site_header);
4188         }
4189
4190         print "<div class=\"page_header\">\n";
4191         if (defined $logo) {
4192                 print $cgi->a({-href => esc_url($logo_url),
4193                                -title => $logo_label},
4194                               $cgi->img({-src => esc_url($logo),
4195                                          -width => 72, -height => 27,
4196                                          -alt => "git",
4197                                          -class => "logo"}));
4198         }
4199         print_nav_breadcrumbs(%opts);
4200         print "</div>\n";
4201
4202         my $have_search = gitweb_check_feature('search');
4203         if (defined $project && $have_search) {
4204                 print_search_form();
4205         }
4206 }
4207
4208 sub git_footer_html {
4209         my $feed_class = 'rss_logo';
4210
4211         print "<div class=\"page_footer\">\n";
4212         if (defined $project) {
4213                 my $descr = git_get_project_description($project);
4214                 if (defined $descr) {
4215                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
4216                 }
4217
4218                 my %href_params = get_feed_info();
4219                 if (!%href_params) {
4220                         $feed_class .= ' generic';
4221                 }
4222                 $href_params{'-title'} ||= 'log';
4223
4224                 foreach my $format (qw(RSS Atom)) {
4225                         $href_params{'action'} = lc($format);
4226                         print $cgi->a({-href => href(%href_params),
4227                                       -title => "$href_params{'-title'} $format feed",
4228                                       -class => $feed_class}, $format)."\n";
4229                 }
4230
4231         } else {
4232                 print $cgi->a({-href => href(project=>undef, action=>"opml",
4233                                              project_filter => $project_filter),
4234                               -class => $feed_class}, "OPML") . " ";
4235                 print $cgi->a({-href => href(project=>undef, action=>"project_index",
4236                                              project_filter => $project_filter),
4237                               -class => $feed_class}, "TXT") . "\n";
4238         }
4239         print "</div>\n"; # class="page_footer"
4240
4241         if (defined $t0 && gitweb_check_feature('timed')) {
4242                 print "<div id=\"generating_info\">\n";
4243                 print 'This page took '.
4244                       '<span id="generating_time" class="time_span">'.
4245                       tv_interval($t0, [ gettimeofday() ]).
4246                       ' seconds </span>'.
4247                       ' and '.
4248                       '<span id="generating_cmd">'.
4249                       $number_of_git_cmds.
4250                       '</span> git commands '.
4251                       " to generate.\n";
4252                 print "</div>\n"; # class="page_footer"
4253         }
4254
4255         if (defined $site_footer && -f $site_footer) {
4256                 insert_file($site_footer);
4257         }
4258
4259         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
4260         if (defined $action &&
4261             $action eq 'blame_incremental') {
4262                 print qq!<script type="text/javascript">\n!.
4263                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
4264                       qq!           "!. href() .qq!");\n!.
4265                       qq!</script>\n!;
4266         } else {
4267                 my ($jstimezone, $tz_cookie, $datetime_class) =
4268                         gitweb_get_feature('javascript-timezone');
4269
4270                 print qq!<script type="text/javascript">\n!.
4271                       qq!window.onload = function () {\n!;
4272                 if (gitweb_check_feature('javascript-actions')) {
4273                         print qq!       fixLinks();\n!;
4274                 }
4275                 if ($jstimezone && $tz_cookie && $datetime_class) {
4276                         print qq!       var tz_cookie = { name: '$tz_cookie', expires: 14, path: '/' };\n!. # in days
4277                               qq!       onloadTZSetup('$jstimezone', tz_cookie, '$datetime_class');\n!;
4278                 }
4279                 print qq!};\n!.
4280                       qq!</script>\n!;
4281         }
4282
4283         print "</body>\n" .
4284               "</html>";
4285 }
4286
4287 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
4288 # Example: die_error(404, 'Hash not found')
4289 # By convention, use the following status codes (as defined in RFC 2616):
4290 # 400: Invalid or missing CGI parameters, or
4291 #      requested object exists but has wrong type.
4292 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
4293 #      this server or project.
4294 # 404: Requested object/revision/project doesn't exist.
4295 # 500: The server isn't configured properly, or
4296 #      an internal error occurred (e.g. failed assertions caused by bugs), or
4297 #      an unknown error occurred (e.g. the git binary died unexpectedly).
4298 # 503: The server is currently unavailable (because it is overloaded,
4299 #      or down for maintenance).  Generally, this is a temporary state.
4300 sub die_error {
4301         my $status = shift || 500;
4302         my $error = esc_html(shift) || "Internal Server Error";
4303         my $extra = shift;
4304         my %opts = @_;
4305
4306         my %http_responses = (
4307                 400 => '400 Bad Request',
4308                 403 => '403 Forbidden',
4309                 404 => '404 Not Found',
4310                 500 => '500 Internal Server Error',
4311                 503 => '503 Service Unavailable',
4312         );
4313         git_header_html($http_responses{$status}, undef, %opts);
4314         print <<EOF;
4315 <div class="page_body">
4316 <br /><br />
4317 $status - $error
4318 <br />
4319 EOF
4320         if (defined $extra) {
4321                 print "<hr />\n" .
4322                       "$extra\n";
4323         }
4324         print "</div>\n";
4325
4326         git_footer_html();
4327         goto DONE_GITWEB
4328                 unless ($opts{'-error_handler'});
4329 }
4330
4331 ## ----------------------------------------------------------------------
4332 ## functions printing or outputting HTML: navigation
4333
4334 sub git_print_page_nav {
4335         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
4336         $extra = '' if !defined $extra; # pager or formats
4337
4338         my @navs = qw(summary shortlog log commit commitdiff tree);
4339         if ($suppress) {
4340                 @navs = grep { $_ ne $suppress } @navs;
4341         }
4342
4343         my %arg = map { $_ => {action=>$_} } @navs;
4344         if (defined $head) {
4345                 for (qw(commit commitdiff)) {
4346                         $arg{$_}{'hash'} = $head;
4347                 }
4348                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
4349                         for (qw(shortlog log)) {
4350                                 $arg{$_}{'hash'} = $head;
4351                         }
4352                 }
4353         }
4354
4355         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
4356         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
4357
4358         my @actions = gitweb_get_feature('actions');
4359         my %repl = (
4360                 '%' => '%',
4361                 'n' => $project,         # project name
4362                 'f' => $git_dir,         # project path within filesystem
4363                 'h' => $treehead || '',  # current hash ('h' parameter)
4364                 'b' => $treebase || '',  # hash base ('hb' parameter)
4365         );
4366         while (@actions) {
4367                 my ($label, $link, $pos) = splice(@actions,0,3);
4368                 # insert
4369                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
4370                 # munch munch
4371                 $link =~ s/%([%nfhb])/$repl{$1}/g;
4372                 $arg{$label}{'_href'} = $link;
4373         }
4374
4375         print "<div class=\"page_nav\">\n" .
4376                 (join " | ",
4377                  map { $_ eq $current ?
4378                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
4379                  } @navs);
4380         print "<br/>\n$extra<br/>\n" .
4381               "</div>\n";
4382 }
4383
4384 # returns a submenu for the navigation of the refs views (tags, heads,
4385 # remotes) with the current view disabled and the remotes view only
4386 # available if the feature is enabled
4387 sub format_ref_views {
4388         my ($current) = @_;
4389         my @ref_views = qw{tags heads};
4390         push @ref_views, 'remotes' if gitweb_check_feature('remote_heads');
4391         return join " | ", map {
4392                 $_ eq $current ? $_ :
4393                 $cgi->a({-href => href(action=>$_)}, $_)
4394         } @ref_views
4395 }
4396
4397 sub format_paging_nav {
4398         my ($action, $page, $has_next_link) = @_;
4399         my $paging_nav;
4400
4401
4402         if ($page > 0) {
4403                 $paging_nav .=
4404                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
4405                         " &sdot; " .
4406                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
4407                                  -accesskey => "p", -title => "Alt-p"}, "prev");
4408         } else {
4409                 $paging_nav .= "first &sdot; prev";
4410         }
4411
4412         if ($has_next_link) {
4413                 $paging_nav .= " &sdot; " .
4414                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
4415                                  -accesskey => "n", -title => "Alt-n"}, "next");
4416         } else {
4417                 $paging_nav .= " &sdot; next";
4418         }
4419
4420         return $paging_nav;
4421 }
4422
4423 ## ......................................................................
4424 ## functions printing or outputting HTML: div
4425
4426 sub git_print_header_div {
4427         my ($action, $title, $hash, $hash_base) = @_;
4428         my %args = ();
4429
4430         $args{'action'} = $action;
4431         $args{'hash'} = $hash if $hash;
4432         $args{'hash_base'} = $hash_base if $hash_base;
4433
4434         print "<div class=\"header\">\n" .
4435               $cgi->a({-href => href(%args), -class => "title"},
4436               $title ? $title : $action) .
4437               "\n</div>\n";
4438 }
4439
4440 sub format_repo_url {
4441         my ($name, $url) = @_;
4442         return "<tr class=\"metadata_url\"><td>$name</td><td>$url</td></tr>\n";
4443 }
4444
4445 # Group output by placing it in a DIV element and adding a header.
4446 # Options for start_div() can be provided by passing a hash reference as the
4447 # first parameter to the function.
4448 # Options to git_print_header_div() can be provided by passing an array
4449 # reference. This must follow the options to start_div if they are present.
4450 # The content can be a scalar, which is output as-is, a scalar reference, which
4451 # is output after html escaping, an IO handle passed either as *handle or
4452 # *handle{IO}, or a function reference. In the latter case all following
4453 # parameters will be taken as argument to the content function call.
4454 sub git_print_section {
4455         my ($div_args, $header_args, $content);
4456         my $arg = shift;
4457         if (ref($arg) eq 'HASH') {
4458                 $div_args = $arg;
4459                 $arg = shift;
4460         }
4461         if (ref($arg) eq 'ARRAY') {
4462                 $header_args = $arg;
4463                 $arg = shift;
4464         }
4465         $content = $arg;
4466
4467         print $cgi->start_div($div_args);
4468         git_print_header_div(@$header_args);
4469
4470         if (ref($content) eq 'CODE') {
4471                 $content->(@_);
4472         } elsif (ref($content) eq 'SCALAR') {
4473                 print esc_html($$content);
4474         } elsif (ref($content) eq 'GLOB' or ref($content) eq 'IO::Handle') {
4475                 print <$content>;
4476         } elsif (!ref($content) && defined($content)) {
4477                 print $content;
4478         }
4479
4480         print $cgi->end_div;
4481 }
4482
4483 sub format_timestamp_html {
4484         my $date = shift;
4485         my $strtime = $date->{'rfc2822'};
4486
4487         my (undef, undef, $datetime_class) =
4488                 gitweb_get_feature('javascript-timezone');
4489         if ($datetime_class) {
4490                 $strtime = qq!<span class="$datetime_class">$strtime</span>!;
4491         }
4492
4493         my $localtime_format = '(%02d:%02d %s)';
4494         if ($date->{'hour_local'} < 6) {
4495                 $localtime_format = '(<span class="atnight">%02d:%02d</span> %s)';
4496         }
4497         $strtime .= ' ' .
4498                     sprintf($localtime_format,
4499                             $date->{'hour_local'}, $date->{'minute_local'}, $date->{'tz_local'});
4500
4501         return $strtime;
4502 }
4503
4504 # Outputs the author name and date in long form
4505 sub git_print_authorship {
4506         my $co = shift;
4507         my %opts = @_;
4508         my $tag = $opts{-tag} || 'div';
4509         my $author = $co->{'author_name'};
4510
4511         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
4512         print "<$tag class=\"author_date\">" .
4513               format_search_author($author, "author", esc_html($author)) .
4514               " [".format_timestamp_html(\%ad)."]".
4515               git_get_avatar($co->{'author_email'}, -pad_before => 1) .
4516               "</$tag>\n";
4517 }
4518
4519 # Outputs table rows containing the full author or committer information,
4520 # in the format expected for 'commit' view (& similar).
4521 # Parameters are a commit hash reference, followed by the list of people
4522 # to output information for. If the list is empty it defaults to both
4523 # author and committer.
4524 sub git_print_authorship_rows {
4525         my $co = shift;
4526         # too bad we can't use @people = @_ || ('author', 'committer')
4527         my @people = @_;
4528         @people = ('author', 'committer') unless @people;
4529         foreach my $who (@people) {
4530                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
4531                 print "<tr><td>$who</td><td>" .
4532                       format_search_author($co->{"${who}_name"}, $who,
4533                                            esc_html($co->{"${who}_name"})) . " " .
4534                       format_search_author($co->{"${who}_email"}, $who,
4535                                            esc_html("<" . $co->{"${who}_email"} . ">")) .
4536                       "</td><td rowspan=\"2\">" .
4537                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
4538                       "</td></tr>\n" .
4539                       "<tr>" .
4540                       "<td></td><td>" .
4541                       format_timestamp_html(\%wd) .
4542                       "</td>" .
4543                       "</tr>\n";
4544         }
4545 }
4546
4547 sub git_print_page_path {
4548         my $name = shift;
4549         my $type = shift;
4550         my $hb = shift;
4551
4552
4553         print "<div class=\"page_path\">";
4554         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
4555                       -title => 'tree root'}, to_utf8("[$project]"));
4556         print " / ";
4557         if (defined $name) {
4558                 my @dirname = split '/', $name;
4559                 my $basename = pop @dirname;
4560                 my $fullname = '';
4561
4562                 foreach my $dir (@dirname) {
4563                         $fullname .= ($fullname ? '/' : '') . $dir;
4564                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
4565                                                      hash_base=>$hb),
4566                                       -title => $fullname}, esc_path($dir));
4567                         print " / ";
4568                 }
4569                 if (defined $type && $type eq 'blob') {
4570                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
4571                                                      hash_base=>$hb),
4572                                       -title => $name}, esc_path($basename));
4573                 } elsif (defined $type && $type eq 'tree') {
4574                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
4575                                                      hash_base=>$hb),
4576                                       -title => $name}, esc_path($basename));
4577                         print " / ";
4578                 } else {
4579                         print esc_path($basename);
4580                 }
4581         }
4582         print "<br/></div>\n";
4583 }
4584
4585 sub git_print_log {
4586         my $log = shift;
4587         my %opts = @_;
4588
4589         if ($opts{'-remove_title'}) {
4590                 # remove title, i.e. first line of log
4591                 shift @$log;
4592         }
4593         # remove leading empty lines
4594         while (defined $log->[0] && $log->[0] eq "") {
4595                 shift @$log;
4596         }
4597
4598         # print log
4599         my $skip_blank_line = 0;
4600         foreach my $line (@$log) {
4601                 if ($line =~ m/^\s*([A-Z][-A-Za-z]*-[Bb]y|C[Cc]): /) {
4602                         if (! $opts{'-remove_signoff'}) {
4603                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
4604                                 $skip_blank_line = 1;
4605                         }
4606                         next;
4607                 }
4608
4609                 if ($line =~ m,\s*([a-z]*link): (https?://\S+),i) {
4610                         if (! $opts{'-remove_signoff'}) {
4611                                 print "<span class=\"signoff\">" . esc_html($1) . ": " .
4612                                         "<a href=\"" . esc_html($2) . "\">" . esc_html($2) . "</a>" .
4613                                         "</span><br/>\n";
4614                                 $skip_blank_line = 1;
4615                         }
4616                         next;
4617                 }
4618
4619                 # print only one empty line
4620                 # do not print empty line after signoff
4621                 if ($line eq "") {
4622                         next if ($skip_blank_line);
4623                         $skip_blank_line = 1;
4624                 } else {
4625                         $skip_blank_line = 0;
4626                 }
4627
4628                 print format_log_line_html($line) . "<br/>\n";
4629         }
4630
4631         if ($opts{'-final_empty_line'}) {
4632                 # end with single empty line
4633                 print "<br/>\n" unless $skip_blank_line;
4634         }
4635 }
4636
4637 # return link target (what link points to)
4638 sub git_get_link_target {
4639         my $hash = shift;
4640         my $link_target;
4641
4642         # read link
4643         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4644                 or return;
4645         {
4646                 local $/ = undef;
4647                 $link_target = <$fd>;
4648         }
4649         close $fd
4650                 or return;
4651
4652         return $link_target;
4653 }
4654
4655 # given link target, and the directory (basedir) the link is in,
4656 # return target of link relative to top directory (top tree);
4657 # return undef if it is not possible (including absolute links).
4658 sub normalize_link_target {
4659         my ($link_target, $basedir) = @_;
4660
4661         # absolute symlinks (beginning with '/') cannot be normalized
4662         return if (substr($link_target, 0, 1) eq '/');
4663
4664         # normalize link target to path from top (root) tree (dir)
4665         my $path;
4666         if ($basedir) {
4667                 $path = $basedir . '/' . $link_target;
4668         } else {
4669                 # we are in top (root) tree (dir)
4670                 $path = $link_target;
4671         }
4672
4673         # remove //, /./, and /../
4674         my @path_parts;
4675         foreach my $part (split('/', $path)) {
4676                 # discard '.' and ''
4677                 next if (!$part || $part eq '.');
4678                 # handle '..'
4679                 if ($part eq '..') {
4680                         if (@path_parts) {
4681                                 pop @path_parts;
4682                         } else {
4683                                 # link leads outside repository (outside top dir)
4684                                 return;
4685                         }
4686                 } else {
4687                         push @path_parts, $part;
4688                 }
4689         }
4690         $path = join('/', @path_parts);
4691
4692         return $path;
4693 }
4694
4695 # print tree entry (row of git_tree), but without encompassing <tr> element
4696 sub git_print_tree_entry {
4697         my ($t, $basedir, $hash_base, $have_blame) = @_;
4698
4699         my %base_key = ();
4700         $base_key{'hash_base'} = $hash_base if defined $hash_base;
4701
4702         # The format of a table row is: mode list link.  Where mode is
4703         # the mode of the entry, list is the name of the entry, an href,
4704         # and link is the action links of the entry.
4705
4706         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
4707         if (exists $t->{'size'}) {
4708                 print "<td class=\"size\">$t->{'size'}</td>\n";
4709         }
4710         if ($t->{'type'} eq "blob") {
4711                 print "<td class=\"list\">" .
4712                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4713                                                file_name=>"$basedir$t->{'name'}", %base_key),
4714                                 -class => "list"}, esc_path($t->{'name'}));
4715                 if (S_ISLNK(oct $t->{'mode'})) {
4716                         my $link_target = git_get_link_target($t->{'hash'});
4717                         if ($link_target) {
4718                                 my $norm_target = normalize_link_target($link_target, $basedir);
4719                                 if (defined $norm_target) {
4720                                         print " -> " .
4721                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
4722                                                                      file_name=>$norm_target),
4723                                                        -title => $norm_target}, esc_path($link_target));
4724                                 } else {
4725                                         print " -> " . esc_path($link_target);
4726                                 }
4727                         }
4728                 }
4729                 print "</td>\n";
4730                 print "<td class=\"link\">";
4731                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4732                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4733                               "blob");
4734                 if ($have_blame) {
4735                         print " | " .
4736                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4737                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4738                                       "blame");
4739                 }
4740                 if (defined $hash_base) {
4741                         print " | " .
4742                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4743                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4744                                       "history");
4745                 }
4746                 print " | " .
4747                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4748                                                file_name=>"$basedir$t->{'name'}")},
4749                                 "raw");
4750                 print "</td>\n";
4751
4752         } elsif ($t->{'type'} eq "tree") {
4753                 print "<td class=\"list\">";
4754                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4755                                              file_name=>"$basedir$t->{'name'}",
4756                                              %base_key)},
4757                               esc_path($t->{'name'}));
4758                 print "</td>\n";
4759                 print "<td class=\"link\">";
4760                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4761                                              file_name=>"$basedir$t->{'name'}",
4762                                              %base_key)},
4763                               "tree");
4764                 if (defined $hash_base) {
4765                         print " | " .
4766                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4767                                                      file_name=>"$basedir$t->{'name'}")},
4768                                       "history");
4769                 }
4770                 print "</td>\n";
4771         } else {
4772                 # unknown object: we can only present history for it
4773                 # (this includes 'commit' object, i.e. submodule support)
4774                 print "<td class=\"list\">" .
4775                       esc_path($t->{'name'}) .
4776                       "</td>\n";
4777                 print "<td class=\"link\">";
4778                 if (defined $hash_base) {
4779                         print $cgi->a({-href => href(action=>"history",
4780                                                      hash_base=>$hash_base,
4781                                                      file_name=>"$basedir$t->{'name'}")},
4782                                       "history");
4783                 }
4784                 print "</td>\n";
4785         }
4786 }
4787
4788 ## ......................................................................
4789 ## functions printing large fragments of HTML
4790
4791 # get pre-image filenames for merge (combined) diff
4792 sub fill_from_file_info {
4793         my ($diff, @parents) = @_;
4794
4795         $diff->{'from_file'} = [ ];
4796         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4797         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4798                 if ($diff->{'status'}[$i] eq 'R' ||
4799                     $diff->{'status'}[$i] eq 'C') {
4800                         $diff->{'from_file'}[$i] =
4801                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4802                 }
4803         }
4804
4805         return $diff;
4806 }
4807
4808 # is current raw difftree line of file deletion
4809 sub is_deleted {
4810         my $diffinfo = shift;
4811
4812         return $diffinfo->{'to_id'} eq ('0' x 40);
4813 }
4814
4815 # does patch correspond to [previous] difftree raw line
4816 # $diffinfo  - hashref of parsed raw diff format
4817 # $patchinfo - hashref of parsed patch diff format
4818 #              (the same keys as in $diffinfo)
4819 sub is_patch_split {
4820         my ($diffinfo, $patchinfo) = @_;
4821
4822         return defined $diffinfo && defined $patchinfo
4823                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4824 }
4825
4826
4827 sub git_difftree_body {
4828         my ($difftree, $hash, @parents) = @_;
4829         my ($parent) = $parents[0];
4830         my $have_blame = gitweb_check_feature('blame');
4831         print "<div class=\"list_head\">\n";
4832         if ($#{$difftree} > 10) {
4833                 print(($#{$difftree} + 1) . " files changed:\n");
4834         }
4835         print "</div>\n";
4836
4837         print "<table class=\"" .
4838               (@parents > 1 ? "combined " : "") .
4839               "diff_tree\">\n";
4840
4841         # header only for combined diff in 'commitdiff' view
4842         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4843         if ($has_header) {
4844                 # table header
4845                 print "<thead><tr>\n" .
4846                        "<th></th><th></th>\n"; # filename, patchN link
4847                 for (my $i = 0; $i < @parents; $i++) {
4848                         my $par = $parents[$i];
4849                         print "<th>" .
4850                               $cgi->a({-href => href(action=>"commitdiff",
4851                                                      hash=>$hash, hash_parent=>$par),
4852                                        -title => 'commitdiff to parent number ' .
4853                                                   ($i+1) . ': ' . substr($par,0,7)},
4854                                       $i+1) .
4855                               "&nbsp;</th>\n";
4856                 }
4857                 print "</tr></thead>\n<tbody>\n";
4858         }
4859
4860         my $alternate = 1;
4861         my $patchno = 0;
4862         foreach my $line (@{$difftree}) {
4863                 my $diff = parsed_difftree_line($line);
4864
4865                 if ($alternate) {
4866                         print "<tr class=\"dark\">\n";
4867                 } else {
4868                         print "<tr class=\"light\">\n";
4869                 }
4870                 $alternate ^= 1;
4871
4872                 if (exists $diff->{'nparents'}) { # combined diff
4873
4874                         fill_from_file_info($diff, @parents)
4875                                 unless exists $diff->{'from_file'};
4876
4877                         if (!is_deleted($diff)) {
4878                                 # file exists in the result (child) commit
4879                                 print "<td>" .
4880                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4881                                                              file_name=>$diff->{'to_file'},
4882                                                              hash_base=>$hash),
4883                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4884                                       "</td>\n";
4885                         } else {
4886                                 print "<td>" .
4887                                       esc_path($diff->{'to_file'}) .
4888                                       "</td>\n";
4889                         }
4890
4891                         if ($action eq 'commitdiff') {
4892                                 # link to patch
4893                                 $patchno++;
4894                                 print "<td class=\"link\">" .
4895                                       $cgi->a({-href => href(-anchor=>"patch$patchno")},
4896                                               "patch") .
4897                                       " | " .
4898                                       "</td>\n";
4899                         }
4900
4901                         my $has_history = 0;
4902                         my $not_deleted = 0;
4903                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4904                                 my $hash_parent = $parents[$i];
4905                                 my $from_hash = $diff->{'from_id'}[$i];
4906                                 my $from_path = $diff->{'from_file'}[$i];
4907                                 my $status = $diff->{'status'}[$i];
4908
4909                                 $has_history ||= ($status ne 'A');
4910                                 $not_deleted ||= ($status ne 'D');
4911
4912                                 if ($status eq 'A') {
4913                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4914                                 } elsif ($status eq 'D') {
4915                                         print "<td class=\"link\">" .
4916                                               $cgi->a({-href => href(action=>"blob",
4917                                                                      hash_base=>$hash,
4918                                                                      hash=>$from_hash,
4919                                                                      file_name=>$from_path)},
4920                                                       "blob" . ($i+1)) .
4921                                               " | </td>\n";
4922                                 } else {
4923                                         if ($diff->{'to_id'} eq $from_hash) {
4924                                                 print "<td class=\"link nochange\">";
4925                                         } else {
4926                                                 print "<td class=\"link\">";
4927                                         }
4928                                         print $cgi->a({-href => href(action=>"blobdiff",
4929                                                                      hash=>$diff->{'to_id'},
4930                                                                      hash_parent=>$from_hash,
4931                                                                      hash_base=>$hash,
4932                                                                      hash_parent_base=>$hash_parent,
4933                                                                      file_name=>$diff->{'to_file'},
4934                                                                      file_parent=>$from_path)},
4935                                                       "diff" . ($i+1)) .
4936                                               " | </td>\n";
4937                                 }
4938                         }
4939
4940                         print "<td class=\"link\">";
4941                         if ($not_deleted) {
4942                                 print $cgi->a({-href => href(action=>"blob",
4943                                                              hash=>$diff->{'to_id'},
4944                                                              file_name=>$diff->{'to_file'},
4945                                                              hash_base=>$hash)},
4946                                               "blob");
4947                                 print " | " if ($has_history);
4948                         }
4949                         if ($has_history) {
4950                                 print $cgi->a({-href => href(action=>"history",
4951                                                              file_name=>$diff->{'to_file'},
4952                                                              hash_base=>$hash)},
4953                                               "history");
4954                         }
4955                         print "</td>\n";
4956
4957                         print "</tr>\n";
4958                         next; # instead of 'else' clause, to avoid extra indent
4959                 }
4960                 # else ordinary diff
4961
4962                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4963                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4964                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4965                         $to_mode_oct = oct $diff->{'to_mode'};
4966                         if (S_ISREG($to_mode_oct)) { # only for regular file
4967                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4968                         }
4969                         $to_file_type = file_type($diff->{'to_mode'});
4970                 }
4971                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4972                         $from_mode_oct = oct $diff->{'from_mode'};
4973                         if (S_ISREG($from_mode_oct)) { # only for regular file
4974                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4975                         }
4976                         $from_file_type = file_type($diff->{'from_mode'});
4977                 }
4978
4979                 if ($diff->{'status'} eq "A") { # created
4980                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4981                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4982                         $mode_chng   .= "]</span>";
4983                         print "<td>";
4984                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4985                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4986                                       -class => "list"}, esc_path($diff->{'file'}));
4987                         print "</td>\n";
4988                         print "<td>$mode_chng</td>\n";
4989                         print "<td class=\"link\">";
4990                         if ($action eq 'commitdiff') {
4991                                 # link to patch
4992                                 $patchno++;
4993                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
4994                                               "patch") .
4995                                       " | ";
4996                         }
4997                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4998                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4999                                       "blob");
5000                         print "</td>\n";
5001
5002                 } elsif ($diff->{'status'} eq "D") { # deleted
5003                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
5004                         print "<td>";
5005                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
5006                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
5007                                        -class => "list"}, esc_path($diff->{'file'}));
5008                         print "</td>\n";
5009                         print "<td>$mode_chng</td>\n";
5010                         print "<td class=\"link\">";
5011                         if ($action eq 'commitdiff') {
5012                                 # link to patch
5013                                 $patchno++;
5014                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5015                                               "patch") .
5016                                       " | ";
5017                         }
5018                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
5019                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
5020                                       "blob") . " | ";
5021                         if ($have_blame) {
5022                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
5023                                                              file_name=>$diff->{'file'})},
5024                                               "blame") . " | ";
5025                         }
5026                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
5027                                                      file_name=>$diff->{'file'})},
5028                                       "history");
5029                         print "</td>\n";
5030
5031                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
5032                         my $mode_chnge = "";
5033                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5034                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
5035                                 if ($from_file_type ne $to_file_type) {
5036                                         $mode_chnge .= " from $from_file_type to $to_file_type";
5037                                 }
5038                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
5039                                         if ($from_mode_str && $to_mode_str) {
5040                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
5041                                         } elsif ($to_mode_str) {
5042                                                 $mode_chnge .= " mode: $to_mode_str";
5043                                         }
5044                                 }
5045                                 $mode_chnge .= "]</span>\n";
5046                         }
5047                         print "<td>";
5048                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5049                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
5050                                       -class => "list"}, esc_path($diff->{'file'}));
5051                         print "</td>\n";
5052                         print "<td>$mode_chnge</td>\n";
5053                         print "<td class=\"link\">";
5054                         if ($action eq 'commitdiff') {
5055                                 # link to patch
5056                                 $patchno++;
5057                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5058                                               "patch") .
5059                                       " | ";
5060                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5061                                 # "commit" view and modified file (not onlu mode changed)
5062                                 print $cgi->a({-href => href(action=>"blobdiff",
5063                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5064                                                              hash_base=>$hash, hash_parent_base=>$parent,
5065                                                              file_name=>$diff->{'file'})},
5066                                               "diff") .
5067                                       " | ";
5068                         }
5069                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5070                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
5071                                        "blob") . " | ";
5072                         if ($have_blame) {
5073                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5074                                                              file_name=>$diff->{'file'})},
5075                                               "blame") . " | ";
5076                         }
5077                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5078                                                      file_name=>$diff->{'file'})},
5079                                       "history");
5080                         print "</td>\n";
5081
5082                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
5083                         my %status_name = ('R' => 'moved', 'C' => 'copied');
5084                         my $nstatus = $status_name{$diff->{'status'}};
5085                         my $mode_chng = "";
5086                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
5087                                 # mode also for directories, so we cannot use $to_mode_str
5088                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
5089                         }
5090                         print "<td>" .
5091                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
5092                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
5093                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
5094                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
5095                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
5096                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
5097                                       -class => "list"}, esc_path($diff->{'from_file'})) .
5098                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
5099                               "<td class=\"link\">";
5100                         if ($action eq 'commitdiff') {
5101                                 # link to patch
5102                                 $patchno++;
5103                                 print $cgi->a({-href => href(-anchor=>"patch$patchno")},
5104                                               "patch") .
5105                                       " | ";
5106                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
5107                                 # "commit" view and modified file (not only pure rename or copy)
5108                                 print $cgi->a({-href => href(action=>"blobdiff",
5109                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
5110                                                              hash_base=>$hash, hash_parent_base=>$parent,
5111                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
5112                                               "diff") .
5113                                       " | ";
5114                         }
5115                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
5116                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
5117                                       "blob") . " | ";
5118                         if ($have_blame) {
5119                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
5120                                                              file_name=>$diff->{'to_file'})},
5121                                               "blame") . " | ";
5122                         }
5123                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
5124                                                     file_name=>$diff->{'to_file'})},
5125                                       "history");
5126                         print "</td>\n";
5127
5128                 } # we should not encounter Unmerged (U) or Unknown (X) status
5129                 print "</tr>\n";
5130         }
5131         print "</tbody>" if $has_header;
5132         print "</table>\n";
5133 }
5134
5135 # Print context lines and then rem/add lines in a side-by-side manner.
5136 sub print_sidebyside_diff_lines {
5137         my ($ctx, $rem, $add) = @_;
5138
5139         # print context block before add/rem block
5140         if (@$ctx) {
5141                 print join '',
5142                         '<div class="chunk_block ctx">',
5143                                 '<div class="old">',
5144                                 @$ctx,
5145                                 '</div>',
5146                                 '<div class="new">',
5147                                 @$ctx,
5148                                 '</div>',
5149                         '</div>';
5150         }
5151
5152         if (!@$add) {
5153                 # pure removal
5154                 print join '',
5155                         '<div class="chunk_block rem">',
5156                                 '<div class="old">',
5157                                 @$rem,
5158                                 '</div>',
5159                         '</div>';
5160         } elsif (!@$rem) {
5161                 # pure addition
5162                 print join '',
5163                         '<div class="chunk_block add">',
5164                                 '<div class="new">',
5165                                 @$add,
5166                                 '</div>',
5167                         '</div>';
5168         } else {
5169                 print join '',
5170                         '<div class="chunk_block chg">',
5171                                 '<div class="old">',
5172                                 @$rem,
5173                                 '</div>',
5174                                 '<div class="new">',
5175                                 @$add,
5176                                 '</div>',
5177                         '</div>';
5178         }
5179 }
5180
5181 # Print context lines and then rem/add lines in inline manner.
5182 sub print_inline_diff_lines {
5183         my ($ctx, $rem, $add) = @_;
5184
5185         print @$ctx, @$rem, @$add;
5186 }
5187
5188 # Format removed and added line, mark changed part and HTML-format them.
5189 # Implementation is based on contrib/diff-highlight
5190 sub format_rem_add_lines_pair {
5191         my ($rem, $add, $num_parents) = @_;
5192
5193         # We need to untabify lines before split()'ing them;
5194         # otherwise offsets would be invalid.
5195         chomp $rem;
5196         chomp $add;
5197         $rem = untabify($rem);
5198         $add = untabify($add);
5199
5200         my @rem = split(//, $rem);
5201         my @add = split(//, $add);
5202         my ($esc_rem, $esc_add);
5203         # Ignore leading +/- characters for each parent.
5204         my ($prefix_len, $suffix_len) = ($num_parents, 0);
5205         my ($prefix_has_nonspace, $suffix_has_nonspace);
5206
5207         my $shorter = (@rem < @add) ? @rem : @add;
5208         while ($prefix_len < $shorter) {
5209                 last if ($rem[$prefix_len] ne $add[$prefix_len]);
5210
5211                 $prefix_has_nonspace = 1 if ($rem[$prefix_len] !~ /\s/);
5212                 $prefix_len++;
5213         }
5214
5215         while ($prefix_len + $suffix_len < $shorter) {
5216                 last if ($rem[-1 - $suffix_len] ne $add[-1 - $suffix_len]);
5217
5218                 $suffix_has_nonspace = 1 if ($rem[-1 - $suffix_len] !~ /\s/);
5219                 $suffix_len++;
5220         }
5221
5222         # Mark lines that are different from each other, but have some common
5223         # part that isn't whitespace.  If lines are completely different, don't
5224         # mark them because that would make output unreadable, especially if
5225         # diff consists of multiple lines.
5226         if ($prefix_has_nonspace || $suffix_has_nonspace) {
5227                 $esc_rem = esc_html_hl_regions($rem, 'marked',
5228                         [$prefix_len, @rem - $suffix_len], -nbsp=>1);
5229                 $esc_add = esc_html_hl_regions($add, 'marked',
5230                         [$prefix_len, @add - $suffix_len], -nbsp=>1);
5231         } else {
5232                 $esc_rem = esc_html($rem, -nbsp=>1);
5233                 $esc_add = esc_html($add, -nbsp=>1);
5234         }
5235
5236         return format_diff_line(\$esc_rem, 'rem'),
5237                format_diff_line(\$esc_add, 'add');
5238 }
5239
5240 # HTML-format diff context, removed and added lines.
5241 sub format_ctx_rem_add_lines {
5242         my ($ctx, $rem, $add, $num_parents) = @_;
5243         my (@new_ctx, @new_rem, @new_add);
5244         my $can_highlight = 0;
5245         my $is_combined = ($num_parents > 1);
5246
5247         # Highlight if every removed line has a corresponding added line.
5248         if (@$add > 0 && @$add == @$rem) {
5249                 $can_highlight = 1;
5250
5251                 # Highlight lines in combined diff only if the chunk contains
5252                 # diff between the same version, e.g.
5253                 #
5254                 #    - a
5255                 #   -  b
5256                 #    + c
5257                 #   +  d
5258                 #
5259                 # Otherwise the highlightling would be confusing.
5260                 if ($is_combined) {
5261                         for (my $i = 0; $i < @$add; $i++) {
5262                                 my $prefix_rem = substr($rem->[$i], 0, $num_parents);
5263                                 my $prefix_add = substr($add->[$i], 0, $num_parents);
5264
5265                                 $prefix_rem =~ s/-/+/g;
5266
5267                                 if ($prefix_rem ne $prefix_add) {
5268                                         $can_highlight = 0;
5269                                         last;
5270                                 }
5271                         }
5272                 }
5273         }
5274
5275         if ($can_highlight) {
5276                 for (my $i = 0; $i < @$add; $i++) {
5277                         my ($line_rem, $line_add) = format_rem_add_lines_pair(
5278                                 $rem->[$i], $add->[$i], $num_parents);
5279                         push @new_rem, $line_rem;
5280                         push @new_add, $line_add;
5281                 }
5282         } else {
5283                 @new_rem = map { format_diff_line($_, 'rem') } @$rem;
5284                 @new_add = map { format_diff_line($_, 'add') } @$add;
5285         }
5286
5287         @new_ctx = map { format_diff_line($_, 'ctx') } @$ctx;
5288
5289         return (\@new_ctx, \@new_rem, \@new_add);
5290 }
5291
5292 # Print context lines and then rem/add lines.
5293 sub print_diff_lines {
5294         my ($ctx, $rem, $add, $diff_style, $num_parents) = @_;
5295         my $is_combined = $num_parents > 1;
5296
5297         ($ctx, $rem, $add) = format_ctx_rem_add_lines($ctx, $rem, $add,
5298                 $num_parents);
5299
5300         if ($diff_style eq 'sidebyside' && !$is_combined) {
5301                 print_sidebyside_diff_lines($ctx, $rem, $add);
5302         } else {
5303                 # default 'inline' style and unknown styles
5304                 print_inline_diff_lines($ctx, $rem, $add);
5305         }
5306 }
5307
5308 sub print_diff_chunk {
5309         my ($diff_style, $num_parents, $from, $to, @chunk) = @_;
5310         my (@ctx, @rem, @add);
5311
5312         # The class of the previous line.
5313         my $prev_class = '';
5314
5315         return unless @chunk;
5316
5317         # incomplete last line might be among removed or added lines,
5318         # or both, or among context lines: find which
5319         for (my $i = 1; $i < @chunk; $i++) {
5320                 if ($chunk[$i][0] eq 'incomplete') {
5321                         $chunk[$i][0] = $chunk[$i-1][0];
5322                 }
5323         }
5324
5325         # guardian
5326         push @chunk, ["", ""];
5327
5328         foreach my $line_info (@chunk) {
5329                 my ($class, $line) = @$line_info;
5330
5331                 # print chunk headers
5332                 if ($class && $class eq 'chunk_header') {
5333                         print format_diff_line($line, $class, $from, $to);
5334                         next;
5335                 }
5336
5337                 ## print from accumulator when have some add/rem lines or end
5338                 # of chunk (flush context lines), or when have add and rem
5339                 # lines and new block is reached (otherwise add/rem lines could
5340                 # be reordered)
5341                 if (!$class || ((@rem || @add) && $class eq 'ctx') ||
5342                     (@rem && @add && $class ne $prev_class)) {
5343                         print_diff_lines(\@ctx, \@rem, \@add,
5344                                          $diff_style, $num_parents);
5345                         @ctx = @rem = @add = ();
5346                 }
5347
5348                 ## adding lines to accumulator
5349                 # guardian value
5350                 last unless $line;
5351                 # rem, add or change
5352                 if ($class eq 'rem') {
5353                         push @rem, $line;
5354                 } elsif ($class eq 'add') {
5355                         push @add, $line;
5356                 }
5357                 # context line
5358                 if ($class eq 'ctx') {
5359                         push @ctx, $line;
5360                 }
5361
5362                 $prev_class = $class;
5363         }
5364 }
5365
5366 sub git_patchset_body {
5367         my ($fd, $diff_style, $difftree, $hash, @hash_parents) = @_;
5368         my ($hash_parent) = $hash_parents[0];
5369
5370         my $is_combined = (@hash_parents > 1);
5371         my $patch_idx = 0;
5372         my $patch_number = 0;
5373         my $patch_line;
5374         my $diffinfo;
5375         my $to_name;
5376         my (%from, %to);
5377         my @chunk; # for side-by-side diff
5378
5379         print "<div class=\"patchset\">\n";
5380
5381         # skip to first patch
5382         while ($patch_line = <$fd>) {
5383                 chomp $patch_line;
5384
5385                 last if ($patch_line =~ m/^diff /);
5386         }
5387
5388  PATCH:
5389         while ($patch_line) {
5390
5391                 # parse "git diff" header line
5392                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
5393                         # $1 is from_name, which we do not use
5394                         $to_name = unquote($2);
5395                         $to_name =~ s!^b/!!;
5396                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
5397                         # $1 is 'cc' or 'combined', which we do not use
5398                         $to_name = unquote($2);
5399                 } else {
5400                         $to_name = undef;
5401                 }
5402
5403                 # check if current patch belong to current raw line
5404                 # and parse raw git-diff line if needed
5405                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
5406                         # this is continuation of a split patch
5407                         print "<div class=\"patch cont\">\n";
5408                 } else {
5409                         # advance raw git-diff output if needed
5410                         $patch_idx++ if defined $diffinfo;
5411
5412                         # read and prepare patch information
5413                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5414
5415                         # compact combined diff output can have some patches skipped
5416                         # find which patch (using pathname of result) we are at now;
5417                         if ($is_combined) {
5418                                 while ($to_name ne $diffinfo->{'to_file'}) {
5419                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5420                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
5421                                               "</div>\n";  # class="patch"
5422
5423                                         $patch_idx++;
5424                                         $patch_number++;
5425
5426                                         last if $patch_idx > $#$difftree;
5427                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5428                                 }
5429                         }
5430
5431                         # modifies %from, %to hashes
5432                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
5433
5434                         # this is first patch for raw difftree line with $patch_idx index
5435                         # we index @$difftree array from 0, but number patches from 1
5436                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
5437                 }
5438
5439                 # git diff header
5440                 #assert($patch_line =~ m/^diff /) if DEBUG;
5441                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
5442                 $patch_number++;
5443                 # print "git diff" header
5444                 print format_git_diff_header_line($patch_line, $diffinfo,
5445                                                   \%from, \%to);
5446
5447                 # print extended diff header
5448                 print "<div class=\"diff extended_header\">\n";
5449         EXTENDED_HEADER:
5450                 while ($patch_line = <$fd>) {
5451                         chomp $patch_line;
5452
5453                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
5454
5455                         print format_extended_diff_header_line($patch_line, $diffinfo,
5456                                                                \%from, \%to);
5457                 }
5458                 print "</div>\n"; # class="diff extended_header"
5459
5460                 # from-file/to-file diff header
5461                 if (! $patch_line) {
5462                         print "</div>\n"; # class="patch"
5463                         last PATCH;
5464                 }
5465                 next PATCH if ($patch_line =~ m/^diff /);
5466                 #assert($patch_line =~ m/^---/) if DEBUG;
5467
5468                 my $last_patch_line = $patch_line;
5469                 $patch_line = <$fd>;
5470                 chomp $patch_line;
5471                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
5472
5473                 print format_diff_from_to_header($last_patch_line, $patch_line,
5474                                                  $diffinfo, \%from, \%to,
5475                                                  @hash_parents);
5476
5477                 # the patch itself
5478         LINE:
5479                 while ($patch_line = <$fd>) {
5480                         chomp $patch_line;
5481
5482                         next PATCH if ($patch_line =~ m/^diff /);
5483
5484                         my $class = diff_line_class($patch_line, \%from, \%to);
5485
5486                         if ($class eq 'chunk_header') {
5487                                 print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5488                                 @chunk = ();
5489                         }
5490
5491                         push @chunk, [ $class, $patch_line ];
5492                 }
5493
5494         } continue {
5495                 if (@chunk) {
5496                         print_diff_chunk($diff_style, scalar @hash_parents, \%from, \%to, @chunk);
5497                         @chunk = ();
5498                 }
5499                 print "</div>\n"; # class="patch"
5500         }
5501
5502         # for compact combined (--cc) format, with chunk and patch simplification
5503         # the patchset might be empty, but there might be unprocessed raw lines
5504         for (++$patch_idx if $patch_number > 0;
5505              $patch_idx < @$difftree;
5506              ++$patch_idx) {
5507                 # read and prepare patch information
5508                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
5509
5510                 # generate anchor for "patch" links in difftree / whatchanged part
5511                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
5512                       format_diff_cc_simplified($diffinfo, @hash_parents) .
5513                       "</div>\n";  # class="patch"
5514
5515                 $patch_number++;
5516         }
5517
5518         if ($patch_number == 0) {
5519                 if (@hash_parents > 1) {
5520                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
5521                 } else {
5522                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
5523                 }
5524         }
5525
5526         print "</div>\n"; # class="patchset"
5527 }
5528
5529 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5530
5531 sub git_project_search_form {
5532         my ($searchtext, $search_use_regexp) = @_;
5533
5534         my $limit = '';
5535         if ($project_filter) {
5536                 $limit = " in '$project_filter/'";
5537         }
5538
5539         print "<div class=\"projsearch\">\n";
5540         print $cgi->start_form(-method => 'get', -action => $my_uri) .
5541               $cgi->hidden(-name => 'a', -value => 'project_list')  . "\n";
5542         print $cgi->hidden(-name => 'pf', -value => $project_filter). "\n"
5543                 if (defined $project_filter);
5544         print $cgi->textfield(-name => 's', -value => $searchtext,
5545                               -title => "Search project by name and description$limit",
5546                               -size => 60) . "\n" .
5547               "<span title=\"Extended regular expression\">" .
5548               $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
5549                              -checked => $search_use_regexp) .
5550               "</span>\n" .
5551               $cgi->submit(-name => 'btnS', -value => 'Search') .
5552               $cgi->end_form() . "\n" .
5553               $cgi->a({-href => href(project => undef, searchtext => undef,
5554                                      project_filter => $project_filter)},
5555                       esc_html("List all projects$limit")) . "<br />\n";
5556         print "</div>\n";
5557 }
5558
5559 # entry for given @keys needs filling if at least one of keys in list
5560 # is not present in %$project_info
5561 sub project_info_needs_filling {
5562         my ($project_info, @keys) = @_;
5563
5564         # return List::MoreUtils::any { !exists $project_info->{$_} } @keys;
5565         foreach my $key (@keys) {
5566                 if (!exists $project_info->{$key}) {
5567                         return 1;
5568                 }
5569         }
5570         return;
5571 }
5572
5573 # fills project list info (age, description, owner, category, forks, etc.)
5574 # for each project in the list, removing invalid projects from
5575 # returned list, or fill only specified info.
5576 #
5577 # Invalid projects are removed from the returned list if and only if you
5578 # ask 'age' or 'age_string' to be filled, because they are the only fields
5579 # that run unconditionally git command that requires repository, and
5580 # therefore do always check if project repository is invalid.
5581 #
5582 # USAGE:
5583 # * fill_project_list_info(\@project_list, 'descr_long', 'ctags')
5584 #   ensures that 'descr_long' and 'ctags' fields are filled
5585 # * @project_list = fill_project_list_info(\@project_list)
5586 #   ensures that all fields are filled (and invalid projects removed)
5587 #
5588 # NOTE: modifies $projlist, but does not remove entries from it
5589 sub fill_project_list_info {
5590         my ($projlist, @wanted_keys) = @_;
5591         my @projects;
5592         my $filter_set = sub { return @_; };
5593         if (@wanted_keys) {
5594                 my %wanted_keys = map { $_ => 1 } @wanted_keys;
5595                 $filter_set = sub { return grep { $wanted_keys{$_} } @_; };
5596         }
5597
5598         my $show_ctags = gitweb_check_feature('ctags');
5599  PROJECT:
5600         foreach my $pr (@$projlist) {
5601                 if (project_info_needs_filling($pr, $filter_set->('age', 'age_string'))) {
5602                         my (@activity) = git_get_last_activity($pr->{'path'});
5603                         unless (@activity) {
5604                                 next PROJECT;
5605                         }
5606                         ($pr->{'age'}, $pr->{'age_string'}) = @activity;
5607                 }
5608                 if (project_info_needs_filling($pr, $filter_set->('descr', 'descr_long'))) {
5609                         my $descr = git_get_project_description($pr->{'path'}) || "";
5610                         $descr = to_utf8($descr);
5611                         $pr->{'descr_long'} = $descr;
5612                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
5613                 }
5614                 if (project_info_needs_filling($pr, $filter_set->('owner'))) {
5615                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
5616                 }
5617                 if ($show_ctags &&
5618                     project_info_needs_filling($pr, $filter_set->('ctags'))) {
5619                         $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
5620                 }
5621                 if ($projects_list_group_categories &&
5622                     project_info_needs_filling($pr, $filter_set->('category'))) {
5623                         my $cat = git_get_project_category($pr->{'path'}) ||
5624                                                            $project_list_default_category;
5625                         $pr->{'category'} = to_utf8($cat);
5626                 }
5627
5628                 push @projects, $pr;
5629         }
5630
5631         return @projects;
5632 }
5633
5634 sub sort_projects_list {
5635         my ($projlist, $order) = @_;
5636
5637         sub order_str {
5638                 my $key = shift;
5639                 return sub { $a->{$key} cmp $b->{$key} };
5640         }
5641
5642         sub order_num_then_undef {
5643                 my $key = shift;
5644                 return sub {
5645                         defined $a->{$key} ?
5646                                 (defined $b->{$key} ? $a->{$key} <=> $b->{$key} : -1) :
5647                                 (defined $b->{$key} ? 1 : 0)
5648                 };
5649         }
5650
5651         my %orderings = (
5652                 project => order_str('path'),
5653                 descr => order_str('descr_long'),
5654                 owner => order_str('owner'),
5655                 age => order_num_then_undef('age'),
5656         );
5657
5658         my $ordering = $orderings{$order};
5659         return defined $ordering ? sort $ordering @$projlist : @$projlist;
5660 }
5661
5662 # returns a hash of categories, containing the list of project
5663 # belonging to each category
5664 sub build_projlist_by_category {
5665         my ($projlist, $from, $to) = @_;
5666         my %categories;
5667
5668         $from = 0 unless defined $from;
5669         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5670
5671         for (my $i = $from; $i <= $to; $i++) {
5672                 my $pr = $projlist->[$i];
5673                 push @{$categories{ $pr->{'category'} }}, $pr;
5674         }
5675
5676         return wantarray ? %categories : \%categories;
5677 }
5678
5679 # print 'sort by' <th> element, generating 'sort by $name' replay link
5680 # if that order is not selected
5681 sub print_sort_th {
5682         print format_sort_th(@_);
5683 }
5684
5685 sub format_sort_th {
5686         my ($name, $order, $header) = @_;
5687         my $sort_th = "";
5688         $header ||= ucfirst($name);
5689
5690         if ($order eq $name) {
5691                 $sort_th .= "<th>$header</th>\n";
5692         } else {
5693                 $sort_th .= "<th>" .
5694                             $cgi->a({-href => href(-replay=>1, order=>$name),
5695                                      -class => "header"}, $header) .
5696                             "</th>\n";
5697         }
5698
5699         return $sort_th;
5700 }
5701
5702 sub git_project_list_rows {
5703         my ($projlist, $from, $to, $check_forks) = @_;
5704
5705         $from = 0 unless defined $from;
5706         $to = $#$projlist if (!defined $to || $#$projlist < $to);
5707
5708         my $alternate = 1;
5709         for (my $i = $from; $i <= $to; $i++) {
5710                 my $pr = $projlist->[$i];
5711
5712                 if ($alternate) {
5713                         print "<tr class=\"dark\">\n";
5714                 } else {
5715                         print "<tr class=\"light\">\n";
5716                 }
5717                 $alternate ^= 1;
5718
5719                 if ($check_forks) {
5720                         print "<td>";
5721                         if ($pr->{'forks'}) {
5722                                 my $nforks = scalar @{$pr->{'forks'}};
5723                                 if ($nforks > 0) {
5724                                         print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks"),
5725                                                        -title => "$nforks forks"}, "+");
5726                                 } else {
5727                                         print $cgi->span({-title => "$nforks forks"}, "+");
5728                                 }
5729                         }
5730                         print "</td>\n";
5731                 }
5732                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5733                                         -class => "list"},
5734                                        esc_html_match_hl($pr->{'path'}, $search_regexp)) .
5735                       "</td>\n" .
5736                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
5737                                         -class => "list",
5738                                         -title => $pr->{'descr_long'}},
5739                                         $search_regexp
5740                                         ? esc_html_match_hl_chopped($pr->{'descr_long'},
5741                                                                     $pr->{'descr'}, $search_regexp)
5742                                         : esc_html($pr->{'descr'})) .
5743                       "</td>\n";
5744                 unless ($omit_owner) {
5745                         print "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
5746                 }
5747                 unless ($omit_age_column) {
5748                         print "<td class=\"". age_class($pr->{'age'}) . "\">" .
5749                             (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n";
5750                 }
5751                 print"<td class=\"link\">" .
5752                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
5753                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
5754                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
5755                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
5756                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
5757                       "</td>\n" .
5758                       "</tr>\n";
5759         }
5760 }
5761
5762 sub git_project_list_body {
5763         # actually uses global variable $project
5764         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
5765         my @projects = @$projlist;
5766
5767         my $check_forks = gitweb_check_feature('forks');
5768         my $show_ctags  = gitweb_check_feature('ctags');
5769         my $tagfilter = $show_ctags ? $input_params{'ctag'} : undef;
5770         $check_forks = undef
5771                 if ($tagfilter || $search_regexp);
5772
5773         # filtering out forks before filling info allows to do less work
5774         @projects = filter_forks_from_projects_list(\@projects)
5775                 if ($check_forks);
5776         # search_projects_list pre-fills required info
5777         @projects = search_projects_list(\@projects,
5778                                          'search_regexp' => $search_regexp,
5779                                          'tagfilter'  => $tagfilter)
5780                 if ($tagfilter || $search_regexp);
5781         # fill the rest
5782         my @all_fields = ('descr', 'descr_long', 'ctags', 'category');
5783         push @all_fields, ('age', 'age_string') unless($omit_age_column);
5784         push @all_fields, 'owner' unless($omit_owner);
5785         @projects = fill_project_list_info(\@projects, @all_fields);
5786
5787         $order ||= $default_projects_order;
5788         $from = 0 unless defined $from;
5789         $to = $#projects if (!defined $to || $#projects < $to);
5790
5791         # short circuit
5792         if ($from > $to) {
5793                 print "<center>\n".
5794                       "<b>No such projects found</b><br />\n".
5795                       "Click ".$cgi->a({-href=>href(project=>undef)},"here")." to view all projects<br />\n".
5796                       "</center>\n<br />\n";
5797                 return;
5798         }
5799
5800         @projects = sort_projects_list(\@projects, $order);
5801
5802         if ($show_ctags) {
5803                 my $ctags = git_gather_all_ctags(\@projects);
5804                 my $cloud = git_populate_project_tagcloud($ctags);
5805                 print git_show_project_tagcloud($cloud, 64);
5806         }
5807
5808         print "<table class=\"project_list\">\n";
5809         unless ($no_header) {
5810                 print "<tr>\n";
5811                 if ($check_forks) {
5812                         print "<th></th>\n";
5813                 }
5814                 print_sort_th('project', $order, 'Project');
5815                 print_sort_th('descr', $order, 'Description');
5816                 print_sort_th('owner', $order, 'Owner') unless $omit_owner;
5817                 print_sort_th('age', $order, 'Last Change') unless $omit_age_column;
5818                 print "<th></th>\n" . # for links
5819                       "</tr>\n";
5820         }
5821
5822         if ($projects_list_group_categories) {
5823                 # only display categories with projects in the $from-$to window
5824                 @projects = sort {$a->{'category'} cmp $b->{'category'}} @projects[$from..$to];
5825                 my %categories = build_projlist_by_category(\@projects, $from, $to);
5826                 foreach my $cat (sort keys %categories) {
5827                         unless ($cat eq "") {
5828                                 print "<tr>\n";
5829                                 if ($check_forks) {
5830                                         print "<td></td>\n";
5831                                 }
5832                                 print "<td class=\"category\" colspan=\"5\">".esc_html($cat)."</td>\n";
5833                                 print "</tr>\n";
5834                         }
5835
5836                         git_project_list_rows($categories{$cat}, undef, undef, $check_forks);
5837                 }
5838         } else {
5839                 git_project_list_rows(\@projects, $from, $to, $check_forks);
5840         }
5841
5842         if (defined $extra) {
5843                 print "<tr>\n";
5844                 if ($check_forks) {
5845                         print "<td></td>\n";
5846                 }
5847                 print "<td colspan=\"5\">$extra</td>\n" .
5848                       "</tr>\n";
5849         }
5850         print "</table>\n";
5851 }
5852
5853 sub git_log_body {
5854         # uses global variable $project
5855         my ($commitlist, $from, $to, $refs, $extra) = @_;
5856
5857         $from = 0 unless defined $from;
5858         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5859
5860         for (my $i = 0; $i <= $to; $i++) {
5861                 my %co = %{$commitlist->[$i]};
5862                 next if !%co;
5863                 my $commit = $co{'id'};
5864                 my $ref = format_ref_marker($refs, $commit);
5865                 git_print_header_div('commit',
5866                                "<span class=\"age\">$co{'age_string'}</span>" .
5867                                esc_html($co{'title'}) . $ref,
5868                                $commit);
5869                 print "<div class=\"title_text\">\n" .
5870                       "<div class=\"log_link\">\n" .
5871                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5872                       " | " .
5873                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5874                       " | " .
5875                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5876                       "<br/>\n" .
5877                       "</div>\n";
5878                       git_print_authorship(\%co, -tag => 'span');
5879                       print "<br/>\n</div>\n";
5880
5881                 print "<div class=\"log_body\">\n";
5882                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5883                 print "</div>\n";
5884         }
5885         if ($extra) {
5886                 print "<div class=\"page_nav\">\n";
5887                 print "$extra\n";
5888                 print "</div>\n";
5889         }
5890 }
5891
5892 sub git_shortlog_body {
5893         # uses global variable $project
5894         my ($commitlist, $from, $to, $refs, $extra) = @_;
5895
5896         $from = 0 unless defined $from;
5897         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5898
5899         print "<table class=\"shortlog\">\n";
5900         my $alternate = 1;
5901         for (my $i = $from; $i <= $to; $i++) {
5902                 my %co = %{$commitlist->[$i]};
5903                 my $commit = $co{'id'};
5904                 my $ref = format_ref_marker($refs, $commit);
5905                 if ($alternate) {
5906                         print "<tr class=\"dark\">\n";
5907                 } else {
5908                         print "<tr class=\"light\">\n";
5909                 }
5910                 $alternate ^= 1;
5911                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
5912                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5913                       format_author_html('td', \%co, 10) . "<td>";
5914                 print format_subject_html($co{'title'}, $co{'title_short'},
5915                                           href(action=>"commit", hash=>$commit), $ref);
5916                 print "</td>\n" .
5917                       "<td class=\"link\">" .
5918                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
5919                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
5920                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
5921                 my $snapshot_links = format_snapshot_links($commit);
5922                 if (defined $snapshot_links) {
5923                         print " | " . $snapshot_links;
5924                 }
5925                 print "</td>\n" .
5926                       "</tr>\n";
5927         }
5928         if (defined $extra) {
5929                 print "<tr>\n" .
5930                       "<td colspan=\"4\">$extra</td>\n" .
5931                       "</tr>\n";
5932         }
5933         print "</table>\n";
5934 }
5935
5936 sub git_history_body {
5937         # Warning: assumes constant type (blob or tree) during history
5938         my ($commitlist, $from, $to, $refs, $extra,
5939             $file_name, $file_hash, $ftype) = @_;
5940
5941         $from = 0 unless defined $from;
5942         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
5943
5944         print "<table class=\"history\">\n";
5945         my $alternate = 1;
5946         for (my $i = $from; $i <= $to; $i++) {
5947                 my %co = %{$commitlist->[$i]};
5948                 if (!%co) {
5949                         next;
5950                 }
5951                 my $commit = $co{'id'};
5952
5953                 my $ref = format_ref_marker($refs, $commit);
5954
5955                 if ($alternate) {
5956                         print "<tr class=\"dark\">\n";
5957                 } else {
5958                         print "<tr class=\"light\">\n";
5959                 }
5960                 $alternate ^= 1;
5961                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5962         # shortlog:   format_author_html('td', \%co, 10)
5963                       format_author_html('td', \%co, 15, 3) . "<td>";
5964                 # originally git_history used chop_str($co{'title'}, 50)
5965                 print format_subject_html($co{'title'}, $co{'title_short'},
5966                                           href(action=>"commit", hash=>$commit), $ref);
5967                 print "</td>\n" .
5968                       "<td class=\"link\">" .
5969                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
5970                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
5971
5972                 if ($ftype eq 'blob') {
5973                         print " | " .
5974                               $cgi->a({-href => href(action=>"blob_plain", hash_base=>$commit, file_name=>$file_name)}, "raw");
5975
5976                         my $blob_current = $file_hash;
5977                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
5978                         if (defined $blob_current && defined $blob_parent &&
5979                                         $blob_current ne $blob_parent) {
5980                                 print " | " .
5981                                         $cgi->a({-href => href(action=>"blobdiff",
5982                                                                hash=>$blob_current, hash_parent=>$blob_parent,
5983                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
5984                                                                file_name=>$file_name)},
5985                                                 "diff to current");
5986                         }
5987                 }
5988                 print "</td>\n" .
5989                       "</tr>\n";
5990         }
5991         if (defined $extra) {
5992                 print "<tr>\n" .
5993                       "<td colspan=\"4\">$extra</td>\n" .
5994                       "</tr>\n";
5995         }
5996         print "</table>\n";
5997 }
5998
5999 sub git_tags_body {
6000         # uses global variable $project
6001         my ($taglist, $from, $to, $extra) = @_;
6002         $from = 0 unless defined $from;
6003         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
6004
6005         print "<table class=\"tags\">\n";
6006         my $alternate = 1;
6007         for (my $i = $from; $i <= $to; $i++) {
6008                 my $entry = $taglist->[$i];
6009                 my %tag = %$entry;
6010                 my $comment = $tag{'subject'};
6011                 my $comment_short;
6012                 if (defined $comment) {
6013                         $comment_short = chop_str($comment, 30, 5);
6014                 }
6015                 if ($alternate) {
6016                         print "<tr class=\"dark\">\n";
6017                 } else {
6018                         print "<tr class=\"light\">\n";
6019                 }
6020                 $alternate ^= 1;
6021                 if (defined $tag{'age'}) {
6022                         print "<td><i>$tag{'age'}</i></td>\n";
6023                 } else {
6024                         print "<td></td>\n";
6025                 }
6026                 print "<td>" .
6027                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
6028                                -class => "list name"}, esc_html($tag{'name'})) .
6029                       "</td>\n" .
6030                       "<td>";
6031                 if (defined $comment) {
6032                         print format_subject_html($comment, $comment_short,
6033                                                   href(action=>"tag", hash=>$tag{'id'}));
6034                 }
6035                 print "</td>\n" .
6036                       "<td class=\"selflink\">";
6037                 if ($tag{'type'} eq "tag") {
6038                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
6039                 } else {
6040                         print "&nbsp;";
6041                 }
6042                 print "</td>\n" .
6043                       "<td class=\"link\">" . " | " .
6044                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
6045                 if ($tag{'reftype'} eq "commit") {
6046                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
6047                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
6048                 } elsif ($tag{'reftype'} eq "blob") {
6049                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
6050                 }
6051                 print "</td>\n" .
6052                       "</tr>";
6053         }
6054         if (defined $extra) {
6055                 print "<tr>\n" .
6056                       "<td colspan=\"5\">$extra</td>\n" .
6057                       "</tr>\n";
6058         }
6059         print "</table>\n";
6060 }
6061
6062 sub git_heads_body {
6063         # uses global variable $project
6064         my ($headlist, $head_at, $from, $to, $extra) = @_;
6065         $from = 0 unless defined $from;
6066         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
6067
6068         print "<table class=\"heads\">\n";
6069         my $alternate = 1;
6070         for (my $i = $from; $i <= $to; $i++) {
6071                 my $entry = $headlist->[$i];
6072                 my %ref = %$entry;
6073                 my $curr = defined $head_at && $ref{'id'} eq $head_at;
6074                 if ($alternate) {
6075                         print "<tr class=\"dark\">\n";
6076                 } else {
6077                         print "<tr class=\"light\">\n";
6078                 }
6079                 $alternate ^= 1;
6080                 print "<td><i>$ref{'age'}</i></td>\n" .
6081                       ($curr ? "<td class=\"current_head\">" : "<td>") .
6082                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
6083                                -class => "list name"},esc_html($ref{'name'})) .
6084                       "</td>\n" .
6085                       "<td class=\"link\">" .
6086                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
6087                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
6088                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'fullname'})}, "tree") .
6089                       "</td>\n" .
6090                       "</tr>";
6091         }
6092         if (defined $extra) {
6093                 print "<tr>\n" .
6094                       "<td colspan=\"3\">$extra</td>\n" .
6095                       "</tr>\n";
6096         }
6097         print "</table>\n";
6098 }
6099
6100 # Display a single remote block
6101 sub git_remote_block {
6102         my ($remote, $rdata, $limit, $head) = @_;
6103
6104         my $heads = $rdata->{'heads'};
6105         my $fetch = $rdata->{'fetch'};
6106         my $push = $rdata->{'push'};
6107
6108         my $urls_table = "<table class=\"projects_list\">\n" ;
6109
6110         if (defined $fetch) {
6111                 if ($fetch eq $push) {
6112                         $urls_table .= format_repo_url("URL", $fetch);
6113                 } else {
6114                         $urls_table .= format_repo_url("Fetch URL", $fetch);
6115                         $urls_table .= format_repo_url("Push URL", $push) if defined $push;
6116                 }
6117         } elsif (defined $push) {
6118                 $urls_table .= format_repo_url("Push URL", $push);
6119         } else {
6120                 $urls_table .= format_repo_url("", "No remote URL");
6121         }
6122
6123         $urls_table .= "</table>\n";
6124
6125         my $dots;
6126         if (defined $limit && $limit < @$heads) {
6127                 $dots = $cgi->a({-href => href(action=>"remotes", hash=>$remote)}, "...");
6128         }
6129
6130         print $urls_table;
6131         git_heads_body($heads, $head, 0, $limit, $dots);
6132 }
6133
6134 # Display a list of remote names with the respective fetch and push URLs
6135 sub git_remotes_list {
6136         my ($remotedata, $limit) = @_;
6137         print "<table class=\"heads\">\n";
6138         my $alternate = 1;
6139         my @remotes = sort keys %$remotedata;
6140
6141         my $limited = $limit && $limit < @remotes;
6142
6143         $#remotes = $limit - 1 if $limited;
6144
6145         while (my $remote = shift @remotes) {
6146                 my $rdata = $remotedata->{$remote};
6147                 my $fetch = $rdata->{'fetch'};
6148                 my $push = $rdata->{'push'};
6149                 if ($alternate) {
6150                         print "<tr class=\"dark\">\n";
6151                 } else {
6152                         print "<tr class=\"light\">\n";
6153                 }
6154                 $alternate ^= 1;
6155                 print "<td>" .
6156                       $cgi->a({-href=> href(action=>'remotes', hash=>$remote),
6157                                -class=> "list name"},esc_html($remote)) .
6158                       "</td>";
6159                 print "<td class=\"link\">" .
6160                       (defined $fetch ? $cgi->a({-href=> $fetch}, "fetch") : "fetch") .
6161                       " | " .
6162                       (defined $push ? $cgi->a({-href=> $push}, "push") : "push") .
6163                       "</td>";
6164
6165                 print "</tr>\n";
6166         }
6167
6168         if ($limited) {
6169                 print "<tr>\n" .
6170                       "<td colspan=\"3\">" .
6171                       $cgi->a({-href => href(action=>"remotes")}, "...") .
6172                       "</td>\n" . "</tr>\n";
6173         }
6174
6175         print "</table>";
6176 }
6177
6178 # Display remote heads grouped by remote, unless there are too many
6179 # remotes, in which case we only display the remote names
6180 sub git_remotes_body {
6181         my ($remotedata, $limit, $head) = @_;
6182         if ($limit and $limit < keys %$remotedata) {
6183                 git_remotes_list($remotedata, $limit);
6184         } else {
6185                 fill_remote_heads($remotedata);
6186                 while (my ($remote, $rdata) = each %$remotedata) {
6187                         git_print_section({-class=>"remote", -id=>$remote},
6188                                 ["remotes", $remote, $remote], sub {
6189                                         git_remote_block($remote, $rdata, $limit, $head);
6190                                 });
6191                 }
6192         }
6193 }
6194
6195 sub git_search_message {
6196         my %co = @_;
6197
6198         my $greptype;
6199         if ($searchtype eq 'commit') {
6200                 $greptype = "--grep=";
6201         } elsif ($searchtype eq 'author') {
6202                 $greptype = "--author=";
6203         } elsif ($searchtype eq 'committer') {
6204                 $greptype = "--committer=";
6205         }
6206         $greptype .= $searchtext;
6207         my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6208                                        $greptype, '--regexp-ignore-case',
6209                                        $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6210
6211         my $paging_nav = '';
6212         if ($page > 0) {
6213                 $paging_nav .=
6214                         $cgi->a({-href => href(-replay=>1, page=>undef)},
6215                                 "first") .
6216                         " &sdot; " .
6217                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6218                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6219         } else {
6220                 $paging_nav .= "first &sdot; prev";
6221         }
6222         my $next_link = '';
6223         if ($#commitlist >= 100) {
6224                 $next_link =
6225                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6226                                  -accesskey => "n", -title => "Alt-n"}, "next");
6227                 $paging_nav .= " &sdot; $next_link";
6228         } else {
6229                 $paging_nav .= " &sdot; next";
6230         }
6231
6232         git_header_html();
6233
6234         git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6235         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6236         if ($page == 0 && !@commitlist) {
6237                 print "<p>No match.</p>\n";
6238         } else {
6239                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6240         }
6241
6242         git_footer_html();
6243 }
6244
6245 sub git_search_changes {
6246         my %co = @_;
6247
6248         local $/ = "\n";
6249         open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6250                 '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6251                 ($search_use_regexp ? '--pickaxe-regex' : ())
6252                         or die_error(500, "Open git-log failed");
6253
6254         git_header_html();
6255
6256         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6257         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6258
6259         print "<table class=\"pickaxe search\">\n";
6260         my $alternate = 1;
6261         undef %co;
6262         my @files;
6263         while (my $line = <$fd>) {
6264                 chomp $line;
6265                 next unless $line;
6266
6267                 my %set = parse_difftree_raw_line($line);
6268                 if (defined $set{'commit'}) {
6269                         # finish previous commit
6270                         if (%co) {
6271                                 print "</td>\n" .
6272                                       "<td class=\"link\">" .
6273                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6274                                               "commit") .
6275                                       " | " .
6276                                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6277                                                              hash_base=>$co{'id'})},
6278                                               "tree") .
6279                                       "</td>\n" .
6280                                       "</tr>\n";
6281                         }
6282
6283                         if ($alternate) {
6284                                 print "<tr class=\"dark\">\n";
6285                         } else {
6286                                 print "<tr class=\"light\">\n";
6287                         }
6288                         $alternate ^= 1;
6289                         %co = parse_commit($set{'commit'});
6290                         my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6291                         print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6292                               "<td><i>$author</i></td>\n" .
6293                               "<td>" .
6294                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6295                                       -class => "list subject"},
6296                                       chop_and_escape_str($co{'title'}, 50) . "<br/>");
6297                 } elsif (defined $set{'to_id'}) {
6298                         next if ($set{'to_id'} =~ m/^0{40}$/);
6299
6300                         print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6301                                                      hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6302                                       -class => "list"},
6303                                       "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6304                               "<br/>\n";
6305                 }
6306         }
6307         close $fd;
6308
6309         # finish last commit (warning: repetition!)
6310         if (%co) {
6311                 print "</td>\n" .
6312                       "<td class=\"link\">" .
6313                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})},
6314                               "commit") .
6315                       " | " .
6316                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'},
6317                                              hash_base=>$co{'id'})},
6318                               "tree") .
6319                       "</td>\n" .
6320                       "</tr>\n";
6321         }
6322
6323         print "</table>\n";
6324
6325         git_footer_html();
6326 }
6327
6328 sub git_search_files {
6329         my %co = @_;
6330
6331         local $/ = "\n";
6332         open my $fd, "-|", git_cmd(), 'grep', '-n', '-z',
6333                 $search_use_regexp ? ('-E', '-i') : '-F',
6334                 $searchtext, $co{'tree'}
6335                         or die_error(500, "Open git-grep failed");
6336
6337         git_header_html();
6338
6339         git_print_page_nav('','', $hash,$co{'tree'},$hash);
6340         git_print_header_div('commit', esc_html($co{'title'}), $hash);
6341
6342         print "<table class=\"grep_search\">\n";
6343         my $alternate = 1;
6344         my $matches = 0;
6345         my $lastfile = '';
6346         my $file_href;
6347         while (my $line = <$fd>) {
6348                 chomp $line;
6349                 my ($file, $lno, $ltext, $binary);
6350                 last if ($matches++ > 1000);
6351                 if ($line =~ /^Binary file (.+) matches$/) {
6352                         $file = $1;
6353                         $binary = 1;
6354                 } else {
6355                         ($file, $lno, $ltext) = split(/\0/, $line, 3);
6356                         $file =~ s/^$co{'tree'}://;
6357                 }
6358                 if ($file ne $lastfile) {
6359                         $lastfile and print "</td></tr>\n";
6360                         if ($alternate++) {
6361                                 print "<tr class=\"dark\">\n";
6362                         } else {
6363                                 print "<tr class=\"light\">\n";
6364                         }
6365                         $file_href = href(action=>"blob", hash_base=>$co{'id'},
6366                                           file_name=>$file);
6367                         print "<td class=\"list\">".
6368                                 $cgi->a({-href => $file_href, -class => "list"}, esc_path($file));
6369                         print "</td><td>\n";
6370                         $lastfile = $file;
6371                 }
6372                 if ($binary) {
6373                         print "<div class=\"binary\">Binary file</div>\n";
6374                 } else {
6375                         $ltext = untabify($ltext);
6376                         if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6377                                 $ltext = esc_html($1, -nbsp=>1);
6378                                 $ltext .= '<span class="match">';
6379                                 $ltext .= esc_html($2, -nbsp=>1);
6380                                 $ltext .= '</span>';
6381                                 $ltext .= esc_html($3, -nbsp=>1);
6382                         } else {
6383                                 $ltext = esc_html($ltext, -nbsp=>1);
6384                         }
6385                         print "<div class=\"pre\">" .
6386                                 $cgi->a({-href => $file_href.'#l'.$lno,
6387                                         -class => "linenr"}, sprintf('%4i', $lno)) .
6388                                 ' ' .  $ltext . "</div>\n";
6389                 }
6390         }
6391         if ($lastfile) {
6392                 print "</td></tr>\n";
6393                 if ($matches > 1000) {
6394                         print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6395                 }
6396         } else {
6397                 print "<div class=\"diff nodifferences\">No matches found</div>\n";
6398         }
6399         close $fd;
6400
6401         print "</table>\n";
6402
6403         git_footer_html();
6404 }
6405
6406 sub git_search_grep_body {
6407         my ($commitlist, $from, $to, $extra) = @_;
6408         $from = 0 unless defined $from;
6409         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
6410
6411         print "<table class=\"commit_search\">\n";
6412         my $alternate = 1;
6413         for (my $i = $from; $i <= $to; $i++) {
6414                 my %co = %{$commitlist->[$i]};
6415                 if (!%co) {
6416                         next;
6417                 }
6418                 my $commit = $co{'id'};
6419                 if ($alternate) {
6420                         print "<tr class=\"dark\">\n";
6421                 } else {
6422                         print "<tr class=\"light\">\n";
6423                 }
6424                 $alternate ^= 1;
6425                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6426                       format_author_html('td', \%co, 15, 5) .
6427                       "<td>" .
6428                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6429                                -class => "list subject"},
6430                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6431                 my $comment = $co{'comment'};
6432                 foreach my $line (@$comment) {
6433                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
6434                                 my ($lead, $match, $trail) = ($1, $2, $3);
6435                                 $match = chop_str($match, 70, 5, 'center');
6436                                 my $contextlen = int((80 - length($match))/2);
6437                                 $contextlen = 30 if ($contextlen > 30);
6438                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
6439                                 $trail = chop_str($trail, $contextlen, 10, 'right');
6440
6441                                 $lead  = esc_html($lead);
6442                                 $match = esc_html($match);
6443                                 $trail = esc_html($trail);
6444
6445                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
6446                         }
6447                 }
6448                 print "</td>\n" .
6449                       "<td class=\"link\">" .
6450                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6451                       " | " .
6452                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
6453                       " | " .
6454                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6455                 print "</td>\n" .
6456                       "</tr>\n";
6457         }
6458         if (defined $extra) {
6459                 print "<tr>\n" .
6460                       "<td colspan=\"3\">$extra</td>\n" .
6461                       "</tr>\n";
6462         }
6463         print "</table>\n";
6464 }
6465
6466 ## ======================================================================
6467 ## ======================================================================
6468 ## actions
6469
6470 sub git_project_list {
6471         my $order = $input_params{'order'};
6472         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6473                 die_error(400, "Unknown order parameter");
6474         }
6475
6476         my @list = git_get_projects_list($project_filter, $strict_export);
6477         if (!@list) {
6478                 die_error(404, "No projects found");
6479         }
6480
6481         git_header_html();
6482         if (defined $home_text && -f $home_text) {
6483                 print "<div class=\"index_include\">\n";
6484                 insert_file($home_text);
6485                 print "</div>\n";
6486         }
6487
6488         git_project_search_form($searchtext, $search_use_regexp);
6489         git_project_list_body(\@list, $order);
6490         git_footer_html();
6491 }
6492
6493 sub git_forks {
6494         my $order = $input_params{'order'};
6495         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
6496                 die_error(400, "Unknown order parameter");
6497         }
6498
6499         my $filter = $project;
6500         $filter =~ s/\.git$//;
6501         my @list = git_get_projects_list($filter);
6502         if (!@list) {
6503                 die_error(404, "No forks found");
6504         }
6505
6506         git_header_html();
6507         git_print_page_nav('','');
6508         git_print_header_div('summary', "$project forks");
6509         git_project_list_body(\@list, $order);
6510         git_footer_html();
6511 }
6512
6513 sub git_project_index {
6514         my @projects = git_get_projects_list($project_filter, $strict_export);
6515         if (!@projects) {
6516                 die_error(404, "No projects found");
6517         }
6518
6519         print $cgi->header(
6520                 -type => 'text/plain',
6521                 -charset => 'utf-8',
6522                 -content_disposition => 'inline; filename="index.aux"');
6523
6524         foreach my $pr (@projects) {
6525                 if (!exists $pr->{'owner'}) {
6526                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
6527                 }
6528
6529                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
6530                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
6531                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6532                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
6533                 $path  =~ s/ /\+/g;
6534                 $owner =~ s/ /\+/g;
6535
6536                 print "$path $owner\n";
6537         }
6538 }
6539
6540 sub git_summary {
6541         my $descr = git_get_project_description($project) || "none";
6542         my %co = parse_commit("HEAD");
6543         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
6544         my $head = $co{'id'};
6545         my $remote_heads = gitweb_check_feature('remote_heads');
6546
6547         my $owner = git_get_project_owner($project);
6548
6549         my $refs = git_get_references();
6550         # These get_*_list functions return one more to allow us to see if
6551         # there are more ...
6552         my @taglist  = git_get_tags_list(16);
6553         my @headlist = git_get_heads_list(16);
6554         my %remotedata = $remote_heads ? git_get_remotes_list() : ();
6555         my @forklist;
6556         my $check_forks = gitweb_check_feature('forks');
6557
6558         if ($check_forks) {
6559                 # find forks of a project
6560                 my $filter = $project;
6561                 $filter =~ s/\.git$//;
6562                 @forklist = git_get_projects_list($filter);
6563                 # filter out forks of forks
6564                 @forklist = filter_forks_from_projects_list(\@forklist)
6565                         if (@forklist);
6566         }
6567
6568         git_header_html();
6569         git_print_page_nav('summary','', $head);
6570
6571         print "<div class=\"title\">&nbsp;</div>\n";
6572         print "<table class=\"projects_list\">\n" .
6573               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n";
6574         if ($owner and not $omit_owner) {
6575                 print  "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
6576         }
6577         if (defined $cd{'rfc2822'}) {
6578                 print "<tr id=\"metadata_lchange\"><td>last change</td>" .
6579                       "<td>".format_timestamp_html(\%cd)."</td></tr>\n";
6580         }
6581
6582         # use per project git URL list in $projectroot/$project/cloneurl
6583         # or make project git URL from git base URL and project name
6584         my $url_tag = "URL";
6585         my @url_list = git_get_project_url_list($project);
6586         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
6587         foreach my $git_url (@url_list) {
6588                 next unless $git_url;
6589                 print format_repo_url($url_tag, $git_url);
6590                 $url_tag = "";
6591         }
6592
6593         # Tag cloud
6594         my $show_ctags = gitweb_check_feature('ctags');
6595         if ($show_ctags) {
6596                 my $ctags = git_get_project_ctags($project);
6597                 if (%$ctags) {
6598                         # without ability to add tags, don't show if there are none
6599                         my $cloud = git_populate_project_tagcloud($ctags);
6600                         print "<tr id=\"metadata_ctags\">" .
6601                               "<td>content tags</td>" .
6602                               "<td>".git_show_project_tagcloud($cloud, 48)."</td>" .
6603                               "</tr>\n";
6604                 }
6605         }
6606
6607         print "</table>\n";
6608
6609         # If XSS prevention is on, we don't include README.html.
6610         # TODO: Allow a readme in some safe format.
6611         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
6612                 print "<div class=\"title\">readme</div>\n" .
6613                       "<div class=\"readme\">\n";
6614                 insert_file("$projectroot/$project/README.html");
6615                 print "\n</div>\n"; # class="readme"
6616         }
6617
6618         # we need to request one more than 16 (0..15) to check if
6619         # those 16 are all
6620         my @commitlist = $head ? parse_commits($head, 17) : ();
6621         if (@commitlist) {
6622                 git_print_header_div('shortlog');
6623                 git_shortlog_body(\@commitlist, 0, 15, $refs,
6624                                   $#commitlist <=  15 ? undef :
6625                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
6626         }
6627
6628         if (@taglist) {
6629                 git_print_header_div('tags');
6630                 git_tags_body(\@taglist, 0, 15,
6631                               $#taglist <=  15 ? undef :
6632                               $cgi->a({-href => href(action=>"tags")}, "..."));
6633         }
6634
6635         if (@headlist) {
6636                 git_print_header_div('heads');
6637                 git_heads_body(\@headlist, $head, 0, 15,
6638                                $#headlist <= 15 ? undef :
6639                                $cgi->a({-href => href(action=>"heads")}, "..."));
6640         }
6641
6642         if (%remotedata) {
6643                 git_print_header_div('remotes');
6644                 git_remotes_body(\%remotedata, 15, $head);
6645         }
6646
6647         if (@forklist) {
6648                 git_print_header_div('forks');
6649                 git_project_list_body(\@forklist, 'age', 0, 15,
6650                                       $#forklist <= 15 ? undef :
6651                                       $cgi->a({-href => href(action=>"forks")}, "..."),
6652                                       'no_header');
6653         }
6654
6655         git_footer_html();
6656 }
6657
6658 sub git_tag {
6659         my %tag = parse_tag($hash);
6660
6661         if (! %tag) {
6662                 die_error(404, "Unknown tag object");
6663         }
6664
6665         my $head = git_get_head_hash($project);
6666         git_header_html();
6667         git_print_page_nav('','', $head,undef,$head);
6668         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
6669         print "<div class=\"title_text\">\n" .
6670               "<table class=\"object_header\">\n" .
6671               "<tr>\n" .
6672               "<td>object</td>\n" .
6673               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6674                                $tag{'object'}) . "</td>\n" .
6675               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
6676                                               $tag{'type'}) . "</td>\n" .
6677               "</tr>\n";
6678         if (defined($tag{'author'})) {
6679                 git_print_authorship_rows(\%tag, 'author');
6680         }
6681         print "</table>\n\n" .
6682               "</div>\n";
6683         print "<div class=\"page_body\">";
6684         my $comment = $tag{'comment'};
6685         foreach my $line (@$comment) {
6686                 chomp $line;
6687                 print esc_html($line, -nbsp=>1) . "<br/>\n";
6688         }
6689         print "</div>\n";
6690         git_footer_html();
6691 }
6692
6693 sub git_blame_common {
6694         my $format = shift || 'porcelain';
6695         if ($format eq 'porcelain' && $input_params{'javascript'}) {
6696                 $format = 'incremental';
6697                 $action = 'blame_incremental'; # for page title etc
6698         }
6699
6700         # permissions
6701         gitweb_check_feature('blame')
6702                 or die_error(403, "Blame view not allowed");
6703
6704         # error checking
6705         die_error(400, "No file name given") unless $file_name;
6706         $hash_base ||= git_get_head_hash($project);
6707         die_error(404, "Couldn't find base commit") unless $hash_base;
6708         my %co = parse_commit($hash_base)
6709                 or die_error(404, "Commit not found");
6710         my $ftype = "blob";
6711         if (!defined $hash) {
6712                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
6713                         or die_error(404, "Error looking up file");
6714         } else {
6715                 $ftype = git_get_type($hash);
6716                 if ($ftype !~ "blob") {
6717                         die_error(400, "Object is not a blob");
6718                 }
6719         }
6720
6721         my $fd;
6722         if ($format eq 'incremental') {
6723                 # get file contents (as base)
6724                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
6725                         or die_error(500, "Open git-cat-file failed");
6726         } elsif ($format eq 'data') {
6727                 # run git-blame --incremental
6728                 open $fd, "-|", git_cmd(), "blame", "--incremental",
6729                         $hash_base, "--", $file_name
6730                         or die_error(500, "Open git-blame --incremental failed");
6731         } else {
6732                 # run git-blame --porcelain
6733                 open $fd, "-|", git_cmd(), "blame", '-p',
6734                         $hash_base, '--', $file_name
6735                         or die_error(500, "Open git-blame --porcelain failed");
6736         }
6737         binmode $fd, ':utf8';
6738
6739         # incremental blame data returns early
6740         if ($format eq 'data') {
6741                 print $cgi->header(
6742                         -type=>"text/plain", -charset => "utf-8",
6743                         -status=> "200 OK");
6744                 local $| = 1; # output autoflush
6745                 while (my $line = <$fd>) {
6746                         print to_utf8($line);
6747                 }
6748                 close $fd
6749                         or print "ERROR $!\n";
6750
6751                 print 'END';
6752                 if (defined $t0 && gitweb_check_feature('timed')) {
6753                         print ' '.
6754                               tv_interval($t0, [ gettimeofday() ]).
6755                               ' '.$number_of_git_cmds;
6756                 }
6757                 print "\n";
6758
6759                 return;
6760         }
6761
6762         # page header
6763         git_header_html();
6764         my $formats_nav =
6765                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
6766                         "blob") .
6767                 " | ";
6768         if ($format eq 'incremental') {
6769                 $formats_nav .=
6770                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
6771                                 "blame") . " (non-incremental)";
6772         } else {
6773                 $formats_nav .=
6774                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
6775                                 "blame") . " (incremental)";
6776         }
6777         $formats_nav .=
6778                 " | " .
6779                 $cgi->a({-href => href(action=>"history", -replay=>1)},
6780                         "history") .
6781                 " | " .
6782                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
6783                         "HEAD");
6784         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6785         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6786         git_print_page_path($file_name, $ftype, $hash_base);
6787
6788         # page body
6789         if ($format eq 'incremental') {
6790                 print "<noscript>\n<div class=\"error\"><center><b>\n".
6791                       "This page requires JavaScript to run.\n Use ".
6792                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
6793                               'this page').
6794                       " instead.\n".
6795                       "</b></center></div>\n</noscript>\n";
6796
6797                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
6798         }
6799
6800         print qq!<div class="page_body">\n!;
6801         print qq!<div id="progress_info">... / ...</div>\n!
6802                 if ($format eq 'incremental');
6803         print qq!<table id="blame_table" class="blame" width="100%">\n!.
6804               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
6805               qq!<thead>\n!.
6806               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
6807               qq!</thead>\n!.
6808               qq!<tbody>\n!;
6809
6810         my @rev_color = qw(light dark);
6811         my $num_colors = scalar(@rev_color);
6812         my $current_color = 0;
6813
6814         if ($format eq 'incremental') {
6815                 my $color_class = $rev_color[$current_color];
6816
6817                 #contents of a file
6818                 my $linenr = 0;
6819         LINE:
6820                 while (my $line = <$fd>) {
6821                         chomp $line;
6822                         $linenr++;
6823
6824                         print qq!<tr id="l$linenr" class="$color_class">!.
6825                               qq!<td class="sha1"><a href=""> </a></td>!.
6826                               qq!<td class="linenr">!.
6827                               qq!<a class="linenr" href="">$linenr</a></td>!;
6828                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
6829                         print qq!</tr>\n!;
6830                 }
6831
6832         } else { # porcelain, i.e. ordinary blame
6833                 my %metainfo = (); # saves information about commits
6834
6835                 # blame data
6836         LINE:
6837                 while (my $line = <$fd>) {
6838                         chomp $line;
6839                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
6840                         # no <lines in group> for subsequent lines in group of lines
6841                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
6842                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
6843                         if (!exists $metainfo{$full_rev}) {
6844                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
6845                         }
6846                         my $meta = $metainfo{$full_rev};
6847                         my $data;
6848                         while ($data = <$fd>) {
6849                                 chomp $data;
6850                                 last if ($data =~ s/^\t//); # contents of line
6851                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
6852                                         $meta->{$1} = $2 unless exists $meta->{$1};
6853                                 }
6854                                 if ($data =~ /^previous /) {
6855                                         $meta->{'nprevious'}++;
6856                                 }
6857                         }
6858                         my $short_rev = substr($full_rev, 0, 8);
6859                         my $author = $meta->{'author'};
6860                         my %date =
6861                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
6862                         my $date = $date{'iso-tz'};
6863                         if ($group_size) {
6864                                 $current_color = ($current_color + 1) % $num_colors;
6865                         }
6866                         my $tr_class = $rev_color[$current_color];
6867                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
6868                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
6869                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
6870                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
6871                         if ($group_size) {
6872                                 print "<td class=\"sha1\"";
6873                                 print " title=\"". esc_html($author) . ", $date\"";
6874                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
6875                                 print ">";
6876                                 print $cgi->a({-href => href(action=>"commit",
6877                                                              hash=>$full_rev,
6878                                                              file_name=>$file_name)},
6879                                               esc_html($short_rev));
6880                                 if ($group_size >= 2) {
6881                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
6882                                         if (@author_initials) {
6883                                                 print "<br />" .
6884                                                       esc_html(join('', @author_initials));
6885                                                 #           or join('.', ...)
6886                                         }
6887                                 }
6888                                 print "</td>\n";
6889                         }
6890                         # 'previous' <sha1 of parent commit> <filename at commit>
6891                         if (exists $meta->{'previous'} &&
6892                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
6893                                 $meta->{'parent'} = $1;
6894                                 $meta->{'file_parent'} = unquote($2);
6895                         }
6896                         my $linenr_commit =
6897                                 exists($meta->{'parent'}) ?
6898                                 $meta->{'parent'} : $full_rev;
6899                         my $linenr_filename =
6900                                 exists($meta->{'file_parent'}) ?
6901                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
6902                         my $blamed = href(action => 'blame',
6903                                           file_name => $linenr_filename,
6904                                           hash_base => $linenr_commit);
6905                         print "<td class=\"linenr\">";
6906                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
6907                                         -class => "linenr" },
6908                                       esc_html($lineno));
6909                         print "</td>";
6910                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
6911                         print "</tr>\n";
6912                 } # end while
6913
6914         }
6915
6916         # footer
6917         print "</tbody>\n".
6918               "</table>\n"; # class="blame"
6919         print "</div>\n";   # class="blame_body"
6920         close $fd
6921                 or print "Reading blob failed\n";
6922
6923         git_footer_html();
6924 }
6925
6926 sub git_blame {
6927         git_blame_common();
6928 }
6929
6930 sub git_blame_incremental {
6931         git_blame_common('incremental');
6932 }
6933
6934 sub git_blame_data {
6935         git_blame_common('data');
6936 }
6937
6938 sub git_tags {
6939         my $head = git_get_head_hash($project);
6940         git_header_html();
6941         git_print_page_nav('','', $head,undef,$head,format_ref_views('tags'));
6942         git_print_header_div('summary', $project);
6943
6944         my @tagslist = git_get_tags_list();
6945         if (@tagslist) {
6946                 git_tags_body(\@tagslist);
6947         }
6948         git_footer_html();
6949 }
6950
6951 sub git_heads {
6952         my $head = git_get_head_hash($project);
6953         git_header_html();
6954         git_print_page_nav('','', $head,undef,$head,format_ref_views('heads'));
6955         git_print_header_div('summary', $project);
6956
6957         my @headslist = git_get_heads_list();
6958         if (@headslist) {
6959                 git_heads_body(\@headslist, $head);
6960         }
6961         git_footer_html();
6962 }
6963
6964 # used both for single remote view and for list of all the remotes
6965 sub git_remotes {
6966         gitweb_check_feature('remote_heads')
6967                 or die_error(403, "Remote heads view is disabled");
6968
6969         my $head = git_get_head_hash($project);
6970         my $remote = $input_params{'hash'};
6971
6972         my $remotedata = git_get_remotes_list($remote);
6973         die_error(500, "Unable to get remote information") unless defined $remotedata;
6974
6975         unless (%$remotedata) {
6976                 die_error(404, defined $remote ?
6977                         "Remote $remote not found" :
6978                         "No remotes found");
6979         }
6980
6981         git_header_html(undef, undef, -action_extra => $remote);
6982         git_print_page_nav('', '',  $head, undef, $head,
6983                 format_ref_views($remote ? '' : 'remotes'));
6984
6985         fill_remote_heads($remotedata);
6986         if (defined $remote) {
6987                 git_print_header_div('remotes', "$remote remote for $project");
6988                 git_remote_block($remote, $remotedata->{$remote}, undef, $head);
6989         } else {
6990                 git_print_header_div('summary', "$project remotes");
6991                 git_remotes_body($remotedata, undef, $head);
6992         }
6993
6994         git_footer_html();
6995 }
6996
6997 sub git_blob_plain {
6998         my $type = shift;
6999         my $expires;
7000
7001         if (!defined $hash) {
7002                 if (defined $file_name) {
7003                         my $base = $hash_base || git_get_head_hash($project);
7004                         $hash = git_get_hash_by_path($base, $file_name, "blob")
7005                                 or die_error(404, "Cannot find file");
7006                 } else {
7007                         die_error(400, "No file name defined");
7008                 }
7009         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7010                 # blobs defined by non-textual hash id's can be cached
7011                 $expires = "+1d";
7012         }
7013
7014         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
7015                 or die_error(500, "Open git-cat-file blob '$hash' failed");
7016
7017         # content-type (can include charset)
7018         $type = blob_contenttype($fd, $file_name, $type);
7019
7020         # "save as" filename, even when no $file_name is given
7021         my $save_as = "$hash";
7022         if (defined $file_name) {
7023                 $save_as = $file_name;
7024         } elsif ($type =~ m/^text\//) {
7025                 $save_as .= '.txt';
7026         }
7027
7028         # With XSS prevention on, blobs of all types except a few known safe
7029         # ones are served with "Content-Disposition: attachment" to make sure
7030         # they don't run in our security domain.  For certain image types,
7031         # blob view writes an <img> tag referring to blob_plain view, and we
7032         # want to be sure not to break that by serving the image as an
7033         # attachment (though Firefox 3 doesn't seem to care).
7034         my $sandbox = $prevent_xss &&
7035                 $type !~ m!^(?:text/[a-z]+|image/(?:gif|png|jpeg))(?:[ ;]|$)!;
7036
7037         # serve text/* as text/plain
7038         if ($prevent_xss &&
7039             ($type =~ m!^text/[a-z]+\b(.*)$! ||
7040              ($type =~ m!^[a-z]+/[a-z]\+xml\b(.*)$! && -T $fd))) {
7041                 my $rest = $1;
7042                 $rest = defined $rest ? $rest : '';
7043                 $type = "text/plain$rest";
7044         }
7045
7046         print $cgi->header(
7047                 -type => $type,
7048                 -expires => $expires,
7049                 -content_disposition =>
7050                         ($sandbox ? 'attachment' : 'inline')
7051                         . '; filename="' . $save_as . '"');
7052         local $/ = undef;
7053         binmode STDOUT, ':raw';
7054         print <$fd>;
7055         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7056         close $fd;
7057 }
7058
7059 sub git_blob {
7060         my $expires;
7061
7062         if (!defined $hash) {
7063                 if (defined $file_name) {
7064                         my $base = $hash_base || git_get_head_hash($project);
7065                         $hash = git_get_hash_by_path($base, $file_name, "blob")
7066                                 or die_error(404, "Cannot find file");
7067                 } else {
7068                         die_error(400, "No file name defined");
7069                 }
7070         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7071                 # blobs defined by non-textual hash id's can be cached
7072                 $expires = "+1d";
7073         }
7074
7075         my $have_blame = gitweb_check_feature('blame');
7076         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
7077                 or die_error(500, "Couldn't cat $file_name, $hash");
7078         my $mimetype = blob_mimetype($fd, $file_name);
7079         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
7080         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
7081                 close $fd;
7082                 return git_blob_plain($mimetype);
7083         }
7084         # we can have blame only for text/* mimetype
7085         $have_blame &&= ($mimetype =~ m!^text/!);
7086
7087         my $highlight = gitweb_check_feature('highlight');
7088         my $syntax = guess_file_syntax($highlight, $file_name);
7089         $fd = run_highlighter($fd, $highlight, $syntax);
7090
7091         git_header_html(undef, $expires);
7092         my $formats_nav = '';
7093         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7094                 if (defined $file_name) {
7095                         if ($have_blame) {
7096                                 $formats_nav .=
7097                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
7098                                                 "blame") .
7099                                         " | ";
7100                         }
7101                         $formats_nav .=
7102                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7103                                         "history") .
7104                                 " | " .
7105                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7106                                         "raw") .
7107                                 " | " .
7108                                 $cgi->a({-href => href(action=>"blob",
7109                                                        hash_base=>"HEAD", file_name=>$file_name)},
7110                                         "HEAD");
7111                 } else {
7112                         $formats_nav .=
7113                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
7114                                         "raw");
7115                 }
7116                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7117                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7118         } else {
7119                 print "<div class=\"page_nav\">\n" .
7120                       "<br/><br/></div>\n" .
7121                       "<div class=\"title\">".esc_html($hash)."</div>\n";
7122         }
7123         git_print_page_path($file_name, "blob", $hash_base);
7124         print "<div class=\"page_body\">\n";
7125         if ($mimetype =~ m!^image/!) {
7126                 print qq!<img class="blob" type="!.esc_attr($mimetype).qq!"!;
7127                 if ($file_name) {
7128                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
7129                 }
7130                 print qq! src="! .
7131                       href(action=>"blob_plain", hash=>$hash,
7132                            hash_base=>$hash_base, file_name=>$file_name) .
7133                       qq!" />\n!;
7134         } else {
7135                 my $nr;
7136                 while (my $line = <$fd>) {
7137                         chomp $line;
7138                         $nr++;
7139                         $line = untabify($line);
7140                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
7141                                $nr, esc_attr(href(-replay => 1)), $nr, $nr,
7142                                $highlight ? sanitize($line) : esc_html($line, -nbsp=>1);
7143                 }
7144         }
7145         close $fd
7146                 or print "Reading blob failed.\n";
7147         print "</div>";
7148         git_footer_html();
7149 }
7150
7151 sub git_tree {
7152         if (!defined $hash_base) {
7153                 $hash_base = "HEAD";
7154         }
7155         if (!defined $hash) {
7156                 if (defined $file_name) {
7157                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
7158                 } else {
7159                         $hash = $hash_base;
7160                 }
7161         }
7162         die_error(404, "No such tree") unless defined($hash);
7163
7164         my $show_sizes = gitweb_check_feature('show-sizes');
7165         my $have_blame = gitweb_check_feature('blame');
7166
7167         my @entries = ();
7168         {
7169                 local $/ = "\0";
7170                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
7171                         ($show_sizes ? '-l' : ()), @extra_options, $hash
7172                         or die_error(500, "Open git-ls-tree failed");
7173                 @entries = map { chomp; $_ } <$fd>;
7174                 close $fd
7175                         or die_error(404, "Reading tree failed");
7176         }
7177
7178         my $refs = git_get_references();
7179         my $ref = format_ref_marker($refs, $hash_base);
7180         git_header_html();
7181         my $basedir = '';
7182         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7183                 my @views_nav = ();
7184                 if (defined $file_name) {
7185                         push @views_nav,
7186                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
7187                                         "history"),
7188                                 $cgi->a({-href => href(action=>"tree",
7189                                                        hash_base=>"HEAD", file_name=>$file_name)},
7190                                         "HEAD"),
7191                 }
7192                 my $snapshot_links = format_snapshot_links($hash);
7193                 if (defined $snapshot_links) {
7194                         # FIXME: Should be available when we have no hash base as well.
7195                         push @views_nav, $snapshot_links;
7196                 }
7197                 git_print_page_nav('tree','', $hash_base, undef, undef,
7198                                    join(' | ', @views_nav));
7199                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
7200         } else {
7201                 undef $hash_base;
7202                 print "<div class=\"page_nav\">\n";
7203                 print "<br/><br/></div>\n";
7204                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
7205         }
7206         if (defined $file_name) {
7207                 $basedir = $file_name;
7208                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
7209                         $basedir .= '/';
7210                 }
7211                 git_print_page_path($file_name, 'tree', $hash_base);
7212         }
7213         print "<div class=\"page_body\">\n";
7214         print "<table class=\"tree\">\n";
7215         my $alternate = 1;
7216         # '..' (top directory) link if possible
7217         if (defined $hash_base &&
7218             defined $file_name && $file_name =~ m![^/]+$!) {
7219                 if ($alternate) {
7220                         print "<tr class=\"dark\">\n";
7221                 } else {
7222                         print "<tr class=\"light\">\n";
7223                 }
7224                 $alternate ^= 1;
7225
7226                 my $up = $file_name;
7227                 $up =~ s!/?[^/]+$!!;
7228                 undef $up unless $up;
7229                 # based on git_print_tree_entry
7230                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
7231                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
7232                 print '<td class="list">';
7233                 print $cgi->a({-href => href(action=>"tree",
7234                                              hash_base=>$hash_base,
7235                                              file_name=>$up)},
7236                               "..");
7237                 print "</td>\n";
7238                 print "<td class=\"link\"></td>\n";
7239
7240                 print "</tr>\n";
7241         }
7242         foreach my $line (@entries) {
7243                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
7244
7245                 if ($alternate) {
7246                         print "<tr class=\"dark\">\n";
7247                 } else {
7248                         print "<tr class=\"light\">\n";
7249                 }
7250                 $alternate ^= 1;
7251
7252                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
7253
7254                 print "</tr>\n";
7255         }
7256         print "</table>\n" .
7257               "</div>";
7258         git_footer_html();
7259 }
7260
7261 sub sanitize_for_filename {
7262     my $name = shift;
7263
7264     $name =~ s!/!-!g;
7265     $name =~ s/[^[:alnum:]_.-]//g;
7266
7267     return $name;
7268 }
7269
7270 sub snapshot_name {
7271         my ($project, $hash) = @_;
7272
7273         # path/to/project.git  -> project
7274         # path/to/project/.git -> project
7275         my $name = to_utf8($project);
7276         $name =~ s,([^/])/*\.git$,$1,;
7277         $name = sanitize_for_filename(basename($name));
7278
7279         my $ver = $hash;
7280         if ($hash =~ /^[0-9a-fA-F]+$/) {
7281                 # shorten SHA-1 hash
7282                 my $full_hash = git_get_full_hash($project, $hash);
7283                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
7284                         $ver = git_get_short_hash($project, $hash);
7285                 }
7286         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
7287                 # tags don't need shortened SHA-1 hash
7288                 $ver = $1;
7289         } else {
7290                 # branches and other need shortened SHA-1 hash
7291                 my $strip_refs = join '|', map { quotemeta } get_branch_refs();
7292                 if ($hash =~ m!^refs/($strip_refs|remotes)/(.*)$!) {
7293                         my $ref_dir = (defined $1) ? $1 : '';
7294                         $ver = $2;
7295
7296                         $ref_dir = sanitize_for_filename($ref_dir);
7297                         # for refs neither in heads nor remotes we want to
7298                         # add a ref dir to archive name
7299                         if ($ref_dir ne '' and $ref_dir ne 'heads' and $ref_dir ne 'remotes') {
7300                                 $ver = $ref_dir . '-' . $ver;
7301                         }
7302                 }
7303                 $ver .= '-' . git_get_short_hash($project, $hash);
7304         }
7305         # special case of sanitization for filename - we change
7306         # slashes to dots instead of dashes
7307         # in case of hierarchical branch names
7308         $ver =~ s!/!.!g;
7309         $ver =~ s/[^[:alnum:]_.-]//g;
7310
7311         # name = project-version_string
7312         $name = "$name-$ver";
7313
7314         return wantarray ? ($name, $name) : $name;
7315 }
7316
7317 sub exit_if_unmodified_since {
7318         my ($latest_epoch) = @_;
7319         our $cgi;
7320
7321         my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
7322         if (defined $if_modified) {
7323                 my $since;
7324                 if (eval { require HTTP::Date; 1; }) {
7325                         $since = HTTP::Date::str2time($if_modified);
7326                 } elsif (eval { require Time::ParseDate; 1; }) {
7327                         $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
7328                 }
7329                 if (defined $since && $latest_epoch <= $since) {
7330                         my %latest_date = parse_date($latest_epoch);
7331                         print $cgi->header(
7332                                 -last_modified => $latest_date{'rfc2822'},
7333                                 -status => '304 Not Modified');
7334                         goto DONE_GITWEB;
7335                 }
7336         }
7337 }
7338
7339 sub git_snapshot {
7340         my $format = $input_params{'snapshot_format'};
7341         if (!@snapshot_fmts) {
7342                 die_error(403, "Snapshots not allowed");
7343         }
7344         # default to first supported snapshot format
7345         $format ||= $snapshot_fmts[0];
7346         if ($format !~ m/^[a-z0-9]+$/) {
7347                 die_error(400, "Invalid snapshot format parameter");
7348         } elsif (!exists($known_snapshot_formats{$format})) {
7349                 die_error(400, "Unknown snapshot format");
7350         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
7351                 die_error(403, "Snapshot format not allowed");
7352         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
7353                 die_error(403, "Unsupported snapshot format");
7354         }
7355
7356         my $type = git_get_type("$hash^{}");
7357         if (!$type) {
7358                 die_error(404, 'Object does not exist');
7359         }  elsif ($type eq 'blob') {
7360                 die_error(400, 'Object is not a tree-ish');
7361         }
7362
7363         my ($name, $prefix) = snapshot_name($project, $hash);
7364         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
7365
7366         my %co = parse_commit($hash);
7367         exit_if_unmodified_since($co{'committer_epoch'}) if %co;
7368
7369         my $cmd = quote_command(
7370                 git_cmd(), 'archive',
7371                 "--format=$known_snapshot_formats{$format}{'format'}",
7372                 "--prefix=$prefix/", $hash);
7373         if (exists $known_snapshot_formats{$format}{'compressor'}) {
7374                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
7375         }
7376
7377         $filename =~ s/(["\\])/\\$1/g;
7378         my %latest_date;
7379         if (%co) {
7380                 %latest_date = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
7381         }
7382
7383         print $cgi->header(
7384                 -type => $known_snapshot_formats{$format}{'type'},
7385                 -content_disposition => 'inline; filename="' . $filename . '"',
7386                 %co ? (-last_modified => $latest_date{'rfc2822'}) : (),
7387                 -status => '200 OK');
7388
7389         open my $fd, "-|", $cmd
7390                 or die_error(500, "Execute git-archive failed");
7391         binmode STDOUT, ':raw';
7392         print <$fd>;
7393         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
7394         close $fd;
7395 }
7396
7397 sub git_log_generic {
7398         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
7399
7400         my $head = git_get_head_hash($project);
7401         if (!defined $base) {
7402                 $base = $head;
7403         }
7404         if (!defined $page) {
7405                 $page = 0;
7406         }
7407         my $refs = git_get_references();
7408
7409         my $commit_hash = $base;
7410         if (defined $parent) {
7411                 $commit_hash = "$parent..$base";
7412         }
7413         my @commitlist =
7414                 parse_commits($commit_hash, 101, (100 * $page),
7415                               defined $file_name ? ($file_name, "--full-history") : ());
7416
7417         my $ftype;
7418         if (!defined $file_hash && defined $file_name) {
7419                 # some commits could have deleted file in question,
7420                 # and not have it in tree, but one of them has to have it
7421                 for (my $i = 0; $i < @commitlist; $i++) {
7422                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
7423                         last if defined $file_hash;
7424                 }
7425         }
7426         if (defined $file_hash) {
7427                 $ftype = git_get_type($file_hash);
7428         }
7429         if (defined $file_name && !defined $ftype) {
7430                 die_error(500, "Unknown type of object");
7431         }
7432         my %co;
7433         if (defined $file_name) {
7434                 %co = parse_commit($base)
7435                         or die_error(404, "Unknown commit object");
7436         }
7437
7438
7439         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
7440         my $next_link = '';
7441         if ($#commitlist >= 100) {
7442                 $next_link =
7443                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
7444                                  -accesskey => "n", -title => "Alt-n"}, "next");
7445         }
7446         my $patch_max = gitweb_get_feature('patches');
7447         if ($patch_max && !defined $file_name) {
7448                 if ($patch_max < 0 || @commitlist <= $patch_max) {
7449                         $paging_nav .= " &sdot; " .
7450                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
7451                                         "patches");
7452                 }
7453         }
7454
7455         git_header_html();
7456         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
7457         if (defined $file_name) {
7458                 git_print_header_div('commit', esc_html($co{'title'}), $base);
7459         } else {
7460                 git_print_header_div('summary', $project)
7461         }
7462         git_print_page_path($file_name, $ftype, $hash_base)
7463                 if (defined $file_name);
7464
7465         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
7466                      $file_name, $file_hash, $ftype);
7467
7468         git_footer_html();
7469 }
7470
7471 sub git_log {
7472         git_log_generic('log', \&git_log_body,
7473                         $hash, $hash_parent);
7474 }
7475
7476 sub git_commit {
7477         $hash ||= $hash_base || "HEAD";
7478         my %co = parse_commit($hash)
7479             or die_error(404, "Unknown commit object");
7480
7481         my $parent  = $co{'parent'};
7482         my $parents = $co{'parents'}; # listref
7483
7484         # we need to prepare $formats_nav before any parameter munging
7485         my $formats_nav;
7486         if (!defined $parent) {
7487                 # --root commitdiff
7488                 $formats_nav .= '(initial)';
7489         } elsif (@$parents == 1) {
7490                 # single parent commit
7491                 $formats_nav .=
7492                         '(parent: ' .
7493                         $cgi->a({-href => href(action=>"commit",
7494                                                hash=>$parent)},
7495                                 esc_html(substr($parent, 0, 7))) .
7496                         ')';
7497         } else {
7498                 # merge commit
7499                 $formats_nav .=
7500                         '(merge: ' .
7501                         join(' ', map {
7502                                 $cgi->a({-href => href(action=>"commit",
7503                                                        hash=>$_)},
7504                                         esc_html(substr($_, 0, 7)));
7505                         } @$parents ) .
7506                         ')';
7507         }
7508         if (gitweb_check_feature('patches') && @$parents <= 1) {
7509                 $formats_nav .= " | " .
7510                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
7511                                 "patch");
7512         }
7513
7514         if (!defined $parent) {
7515                 $parent = "--root";
7516         }
7517         my @difftree;
7518         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
7519                 @diff_opts,
7520                 (@$parents <= 1 ? $parent : '-c'),
7521                 $hash, "--"
7522                 or die_error(500, "Open git-diff-tree failed");
7523         @difftree = map { chomp; $_ } <$fd>;
7524         close $fd or die_error(404, "Reading git-diff-tree failed");
7525
7526         # non-textual hash id's can be cached
7527         my $expires;
7528         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7529                 $expires = "+1d";
7530         }
7531         my $refs = git_get_references();
7532         my $ref = format_ref_marker($refs, $co{'id'});
7533
7534         git_header_html(undef, $expires);
7535         git_print_page_nav('commit', '',
7536                            $hash, $co{'tree'}, $hash,
7537                            $formats_nav);
7538
7539         if (defined $co{'parent'}) {
7540                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
7541         } else {
7542                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
7543         }
7544         print "<div class=\"title_text\">\n" .
7545               "<table class=\"object_header\">\n";
7546         git_print_authorship_rows(\%co);
7547         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
7548         print "<tr>" .
7549               "<td>tree</td>" .
7550               "<td class=\"sha1\">" .
7551               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
7552                        class => "list"}, $co{'tree'}) .
7553               "</td>" .
7554               "<td class=\"link\">" .
7555               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
7556                       "tree");
7557         my $snapshot_links = format_snapshot_links($hash);
7558         if (defined $snapshot_links) {
7559                 print " | " . $snapshot_links;
7560         }
7561         print "</td>" .
7562               "</tr>\n";
7563
7564         foreach my $par (@$parents) {
7565                 print "<tr>" .
7566                       "<td>parent</td>" .
7567                       "<td class=\"sha1\">" .
7568                       $cgi->a({-href => href(action=>"commit", hash=>$par),
7569                                class => "list"}, $par) .
7570                       "</td>" .
7571                       "<td class=\"link\">" .
7572                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
7573                       " | " .
7574                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
7575                       "</td>" .
7576                       "</tr>\n";
7577         }
7578         print "</table>".
7579               "</div>\n";
7580
7581         print "<div class=\"page_body\">\n";
7582         git_print_log($co{'comment'});
7583         print "</div>\n";
7584
7585         git_difftree_body(\@difftree, $hash, @$parents);
7586
7587         git_footer_html();
7588 }
7589
7590 sub git_object {
7591         # object is defined by:
7592         # - hash or hash_base alone
7593         # - hash_base and file_name
7594         my $type;
7595
7596         # - hash or hash_base alone
7597         if ($hash || ($hash_base && !defined $file_name)) {
7598                 my $object_id = $hash || $hash_base;
7599
7600                 open my $fd, "-|", quote_command(
7601                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
7602                         or die_error(404, "Object does not exist");
7603                 $type = <$fd>;
7604                 defined $type && chomp $type;
7605                 close $fd
7606                         or die_error(404, "Object does not exist");
7607
7608         # - hash_base and file_name
7609         } elsif ($hash_base && defined $file_name) {
7610                 $file_name =~ s,/+$,,;
7611
7612                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
7613                         or die_error(404, "Base object does not exist");
7614
7615                 # here errors should not happen
7616                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
7617                         or die_error(500, "Open git-ls-tree failed");
7618                 my $line = <$fd>;
7619                 close $fd;
7620
7621                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
7622                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
7623                         die_error(404, "File or directory for given base does not exist");
7624                 }
7625                 $type = $2;
7626                 $hash = $3;
7627         } else {
7628                 die_error(400, "Not enough information to find object");
7629         }
7630
7631         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
7632                                           hash=>$hash, hash_base=>$hash_base,
7633                                           file_name=>$file_name),
7634                              -status => '302 Found');
7635 }
7636
7637 sub git_blobdiff {
7638         my $format = shift || 'html';
7639         my $diff_style = $input_params{'diff_style'} || 'inline';
7640
7641         my $fd;
7642         my @difftree;
7643         my %diffinfo;
7644         my $expires;
7645
7646         # preparing $fd and %diffinfo for git_patchset_body
7647         # new style URI
7648         if (defined $hash_base && defined $hash_parent_base) {
7649                 if (defined $file_name) {
7650                         # read raw output
7651                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7652                                 $hash_parent_base, $hash_base,
7653                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
7654                                 or die_error(500, "Open git-diff-tree failed");
7655                         @difftree = map { chomp; $_ } <$fd>;
7656                         close $fd
7657                                 or die_error(404, "Reading git-diff-tree failed");
7658                         @difftree
7659                                 or die_error(404, "Blob diff not found");
7660
7661                 } elsif (defined $hash &&
7662                          $hash =~ /[0-9a-fA-F]{40}/) {
7663                         # try to find filename from $hash
7664
7665                         # read filtered raw output
7666                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7667                                 $hash_parent_base, $hash_base, "--"
7668                                 or die_error(500, "Open git-diff-tree failed");
7669                         @difftree =
7670                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
7671                                 # $hash == to_id
7672                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
7673                                 map { chomp; $_ } <$fd>;
7674                         close $fd
7675                                 or die_error(404, "Reading git-diff-tree failed");
7676                         @difftree
7677                                 or die_error(404, "Blob diff not found");
7678
7679                 } else {
7680                         die_error(400, "Missing one of the blob diff parameters");
7681                 }
7682
7683                 if (@difftree > 1) {
7684                         die_error(400, "Ambiguous blob diff specification");
7685                 }
7686
7687                 %diffinfo = parse_difftree_raw_line($difftree[0]);
7688                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
7689                 $file_name   ||= $diffinfo{'to_file'};
7690
7691                 $hash_parent ||= $diffinfo{'from_id'};
7692                 $hash        ||= $diffinfo{'to_id'};
7693
7694                 # non-textual hash id's can be cached
7695                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
7696                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
7697                         $expires = '+1d';
7698                 }
7699
7700                 # open patch output
7701                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7702                         '-p', ($format eq 'html' ? "--full-index" : ()),
7703                         $hash_parent_base, $hash_base,
7704                         "--", (defined $file_parent ? $file_parent : ()), $file_name
7705                         or die_error(500, "Open git-diff-tree failed");
7706         }
7707
7708         # old/legacy style URI -- not generated anymore since 1.4.3.
7709         if (!%diffinfo) {
7710                 die_error('404 Not Found', "Missing one of the blob diff parameters")
7711         }
7712
7713         # header
7714         if ($format eq 'html') {
7715                 my $formats_nav =
7716                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
7717                                 "raw");
7718                 $formats_nav .= diff_style_nav($diff_style);
7719                 git_header_html(undef, $expires);
7720                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
7721                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
7722                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
7723                 } else {
7724                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
7725                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
7726                 }
7727                 if (defined $file_name) {
7728                         git_print_page_path($file_name, "blob", $hash_base);
7729                 } else {
7730                         print "<div class=\"page_path\"></div>\n";
7731                 }
7732
7733         } elsif ($format eq 'plain') {
7734                 print $cgi->header(
7735                         -type => 'text/plain',
7736                         -charset => 'utf-8',
7737                         -expires => $expires,
7738                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
7739
7740                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7741
7742         } else {
7743                 die_error(400, "Unknown blobdiff format");
7744         }
7745
7746         # patch
7747         if ($format eq 'html') {
7748                 print "<div class=\"page_body\">\n";
7749
7750                 git_patchset_body($fd, $diff_style,
7751                                   [ \%diffinfo ], $hash_base, $hash_parent_base);
7752                 close $fd;
7753
7754                 print "</div>\n"; # class="page_body"
7755                 git_footer_html();
7756
7757         } else {
7758                 while (my $line = <$fd>) {
7759                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
7760                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
7761
7762                         print $line;
7763
7764                         last if $line =~ m!^\+\+\+!;
7765                 }
7766                 local $/ = undef;
7767                 print <$fd>;
7768                 close $fd;
7769         }
7770 }
7771
7772 sub git_blobdiff_plain {
7773         git_blobdiff('plain');
7774 }
7775
7776 # assumes that it is added as later part of already existing navigation,
7777 # so it returns "| foo | bar" rather than just "foo | bar"
7778 sub diff_style_nav {
7779         my ($diff_style, $is_combined) = @_;
7780         $diff_style ||= 'inline';
7781
7782         return "" if ($is_combined);
7783
7784         my @styles = (inline => 'inline', 'sidebyside' => 'side by side');
7785         my %styles = @styles;
7786         @styles =
7787                 @styles[ map { $_ * 2 } 0..$#styles/2 ];
7788
7789         return join '',
7790                 map { " | ".$_ }
7791                 map {
7792                         $_ eq $diff_style ? $styles{$_} :
7793                         $cgi->a({-href => href(-replay=>1, diff_style => $_)}, $styles{$_})
7794                 } @styles;
7795 }
7796
7797 sub git_commitdiff {
7798         my %params = @_;
7799         my $format = $params{-format} || 'html';
7800         my $diff_style = $input_params{'diff_style'} || 'inline';
7801
7802         my ($patch_max) = gitweb_get_feature('patches');
7803         if ($format eq 'patch') {
7804                 die_error(403, "Patch view not allowed") unless $patch_max;
7805         }
7806
7807         $hash ||= $hash_base || "HEAD";
7808         my %co = parse_commit($hash)
7809             or die_error(404, "Unknown commit object");
7810
7811         # choose format for commitdiff for merge
7812         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
7813                 $hash_parent = '--cc';
7814         }
7815         # we need to prepare $formats_nav before almost any parameter munging
7816         my $formats_nav;
7817         if ($format eq 'html') {
7818                 $formats_nav =
7819                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
7820                                 "raw");
7821                 if ($patch_max && @{$co{'parents'}} <= 1) {
7822                         $formats_nav .= " | " .
7823                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
7824                                         "patch");
7825                 }
7826                 $formats_nav .= diff_style_nav($diff_style, @{$co{'parents'}} > 1);
7827
7828                 if (defined $hash_parent &&
7829                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
7830                         # commitdiff with two commits given
7831                         my $hash_parent_short = $hash_parent;
7832                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
7833                                 $hash_parent_short = substr($hash_parent, 0, 7);
7834                         }
7835                         $formats_nav .=
7836                                 ' (from';
7837                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
7838                                 if ($co{'parents'}[$i] eq $hash_parent) {
7839                                         $formats_nav .= ' parent ' . ($i+1);
7840                                         last;
7841                                 }
7842                         }
7843                         $formats_nav .= ': ' .
7844                                 $cgi->a({-href => href(-replay=>1,
7845                                                        hash=>$hash_parent, hash_base=>undef)},
7846                                         esc_html($hash_parent_short)) .
7847                                 ')';
7848                 } elsif (!$co{'parent'}) {
7849                         # --root commitdiff
7850                         $formats_nav .= ' (initial)';
7851                 } elsif (scalar @{$co{'parents'}} == 1) {
7852                         # single parent commit
7853                         $formats_nav .=
7854                                 ' (parent: ' .
7855                                 $cgi->a({-href => href(-replay=>1,
7856                                                        hash=>$co{'parent'}, hash_base=>undef)},
7857                                         esc_html(substr($co{'parent'}, 0, 7))) .
7858                                 ')';
7859                 } else {
7860                         # merge commit
7861                         if ($hash_parent eq '--cc') {
7862                                 $formats_nav .= ' | ' .
7863                                         $cgi->a({-href => href(-replay=>1,
7864                                                                hash=>$hash, hash_parent=>'-c')},
7865                                                 'combined');
7866                         } else { # $hash_parent eq '-c'
7867                                 $formats_nav .= ' | ' .
7868                                         $cgi->a({-href => href(-replay=>1,
7869                                                                hash=>$hash, hash_parent=>'--cc')},
7870                                                 'compact');
7871                         }
7872                         $formats_nav .=
7873                                 ' (merge: ' .
7874                                 join(' ', map {
7875                                         $cgi->a({-href => href(-replay=>1,
7876                                                                hash=>$_, hash_base=>undef)},
7877                                                 esc_html(substr($_, 0, 7)));
7878                                 } @{$co{'parents'}} ) .
7879                                 ')';
7880                 }
7881         }
7882
7883         my $hash_parent_param = $hash_parent;
7884         if (!defined $hash_parent_param) {
7885                 # --cc for multiple parents, --root for parentless
7886                 $hash_parent_param =
7887                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
7888         }
7889
7890         # read commitdiff
7891         my $fd;
7892         my @difftree;
7893         if ($format eq 'html') {
7894                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7895                         "--no-commit-id", "--patch-with-raw", "--full-index",
7896                         $hash_parent_param, $hash, "--"
7897                         or die_error(500, "Open git-diff-tree failed");
7898
7899                 while (my $line = <$fd>) {
7900                         chomp $line;
7901                         # empty line ends raw part of diff-tree output
7902                         last unless $line;
7903                         push @difftree, scalar parse_difftree_raw_line($line);
7904                 }
7905
7906         } elsif ($format eq 'plain') {
7907                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
7908                         '-p', $hash_parent_param, $hash, "--"
7909                         or die_error(500, "Open git-diff-tree failed");
7910         } elsif ($format eq 'patch') {
7911                 # For commit ranges, we limit the output to the number of
7912                 # patches specified in the 'patches' feature.
7913                 # For single commits, we limit the output to a single patch,
7914                 # diverging from the git-format-patch default.
7915                 my @commit_spec = ();
7916                 if ($hash_parent) {
7917                         if ($patch_max > 0) {
7918                                 push @commit_spec, "-$patch_max";
7919                         }
7920                         push @commit_spec, '-n', "$hash_parent..$hash";
7921                 } else {
7922                         if ($params{-single}) {
7923                                 push @commit_spec, '-1';
7924                         } else {
7925                                 if ($patch_max > 0) {
7926                                         push @commit_spec, "-$patch_max";
7927                                 }
7928                                 push @commit_spec, "-n";
7929                         }
7930                         push @commit_spec, '--root', $hash;
7931                 }
7932                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
7933                         '--encoding=utf8', '--stdout', @commit_spec
7934                         or die_error(500, "Open git-format-patch failed");
7935         } else {
7936                 die_error(400, "Unknown commitdiff format");
7937         }
7938
7939         # non-textual hash id's can be cached
7940         my $expires;
7941         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
7942                 $expires = "+1d";
7943         }
7944
7945         # write commit message
7946         if ($format eq 'html') {
7947                 my $refs = git_get_references();
7948                 my $ref = format_ref_marker($refs, $co{'id'});
7949
7950                 git_header_html(undef, $expires);
7951                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
7952                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
7953                 print "<div class=\"title_text\">\n" .
7954                       "<table class=\"object_header\">\n";
7955                 git_print_authorship_rows(\%co);
7956                 print "</table>".
7957                       "</div>\n";
7958                 print "<div class=\"page_body\">\n";
7959                 if (@{$co{'comment'}} > 1) {
7960                         print "<div class=\"log\">\n";
7961                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
7962                         print "</div>\n"; # class="log"
7963                 }
7964
7965         } elsif ($format eq 'plain') {
7966                 my $refs = git_get_references("tags");
7967                 my $tagname = git_get_rev_name_tags($hash);
7968                 my $filename = basename($project) . "-$hash.patch";
7969
7970                 print $cgi->header(
7971                         -type => 'text/plain',
7972                         -charset => 'utf-8',
7973                         -expires => $expires,
7974                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7975                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
7976                 print "From: " . to_utf8($co{'author'}) . "\n";
7977                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
7978                 print "Subject: " . to_utf8($co{'title'}) . "\n";
7979
7980                 print "X-Git-Tag: $tagname\n" if $tagname;
7981                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
7982
7983                 foreach my $line (@{$co{'comment'}}) {
7984                         print to_utf8($line) . "\n";
7985                 }
7986                 print "---\n\n";
7987         } elsif ($format eq 'patch') {
7988                 my $filename = basename($project) . "-$hash.patch";
7989
7990                 print $cgi->header(
7991                         -type => 'text/plain',
7992                         -charset => 'utf-8',
7993                         -expires => $expires,
7994                         -content_disposition => 'inline; filename="' . "$filename" . '"');
7995         }
7996
7997         # write patch
7998         if ($format eq 'html') {
7999                 my $use_parents = !defined $hash_parent ||
8000                         $hash_parent eq '-c' || $hash_parent eq '--cc';
8001                 git_difftree_body(\@difftree, $hash,
8002                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
8003                 print "<br/>\n";
8004
8005                 git_patchset_body($fd, $diff_style,
8006                                   \@difftree, $hash,
8007                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
8008                 close $fd;
8009                 print "</div>\n"; # class="page_body"
8010                 git_footer_html();
8011
8012         } elsif ($format eq 'plain') {
8013                 local $/ = undef;
8014                 print <$fd>;
8015                 close $fd
8016                         or print "Reading git-diff-tree failed\n";
8017         } elsif ($format eq 'patch') {
8018                 local $/ = undef;
8019                 print <$fd>;
8020                 close $fd
8021                         or print "Reading git-format-patch failed\n";
8022         }
8023 }
8024
8025 sub git_commitdiff_plain {
8026         git_commitdiff(-format => 'plain');
8027 }
8028
8029 # format-patch-style patches
8030 sub git_patch {
8031         git_commitdiff(-format => 'patch', -single => 1);
8032 }
8033
8034 sub git_patches {
8035         git_commitdiff(-format => 'patch');
8036 }
8037
8038 sub git_history {
8039         git_log_generic('history', \&git_history_body,
8040                         $hash_base, $hash_parent_base,
8041                         $file_name, $hash);
8042 }
8043
8044 sub git_search {
8045         $searchtype ||= 'commit';
8046
8047         # check if appropriate features are enabled
8048         gitweb_check_feature('search')
8049                 or die_error(403, "Search is disabled");
8050         if ($searchtype eq 'pickaxe') {
8051                 # pickaxe may take all resources of your box and run for several minutes
8052                 # with every query - so decide by yourself how public you make this feature
8053                 gitweb_check_feature('pickaxe')
8054                         or die_error(403, "Pickaxe search is disabled");
8055         }
8056         if ($searchtype eq 'grep') {
8057                 # grep search might be potentially CPU-intensive, too
8058                 gitweb_check_feature('grep')
8059                         or die_error(403, "Grep search is disabled");
8060         }
8061
8062         if (!defined $searchtext) {
8063                 die_error(400, "Text field is empty");
8064         }
8065         if (!defined $hash) {
8066                 $hash = git_get_head_hash($project);
8067         }
8068         my %co = parse_commit($hash);
8069         if (!%co) {
8070                 die_error(404, "Unknown commit object");
8071         }
8072         if (!defined $page) {
8073                 $page = 0;
8074         }
8075
8076         if ($searchtype eq 'commit' ||
8077             $searchtype eq 'author' ||
8078             $searchtype eq 'committer') {
8079                 git_search_message(%co);
8080         } elsif ($searchtype eq 'pickaxe') {
8081                 git_search_changes(%co);
8082         } elsif ($searchtype eq 'grep') {
8083                 git_search_files(%co);
8084         } else {
8085                 die_error(400, "Unknown search type");
8086         }
8087 }
8088
8089 sub git_search_help {
8090         git_header_html();
8091         git_print_page_nav('','', $hash,$hash,$hash);
8092         print <<EOT;
8093 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
8094 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
8095 the pattern entered is recognized as the POSIX extended
8096 <a href="https://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
8097 insensitive).</p>
8098 <dl>
8099 <dt><b>commit</b></dt>
8100 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
8101 EOT
8102         my $have_grep = gitweb_check_feature('grep');
8103         if ($have_grep) {
8104                 print <<EOT;
8105 <dt><b>grep</b></dt>
8106 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
8107     a different one) are searched for the given pattern. On large trees, this search can take
8108 a while and put some strain on the server, so please use it with some consideration. Note that
8109 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
8110 case-sensitive.</dd>
8111 EOT
8112         }
8113         print <<EOT;
8114 <dt><b>author</b></dt>
8115 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
8116 <dt><b>committer</b></dt>
8117 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
8118 EOT
8119         my $have_pickaxe = gitweb_check_feature('pickaxe');
8120         if ($have_pickaxe) {
8121                 print <<EOT;
8122 <dt><b>pickaxe</b></dt>
8123 <dd>All commits that caused the string to appear or disappear from any file (changes that
8124 added, removed or "modified" the string) will be listed. This search can take a while and
8125 takes a lot of strain on the server, so please use it wisely. Note that since you may be
8126 interested even in changes just changing the case as well, this search is case sensitive.</dd>
8127 EOT
8128         }
8129         print "</dl>\n";
8130         git_footer_html();
8131 }
8132
8133 sub git_shortlog {
8134         git_log_generic('shortlog', \&git_shortlog_body,
8135                         $hash, $hash_parent);
8136 }
8137
8138 ## ......................................................................
8139 ## feeds (RSS, Atom; OPML)
8140
8141 sub git_feed {
8142         my $format = shift || 'atom';
8143         my $have_blame = gitweb_check_feature('blame');
8144
8145         # Atom: http://www.atomenabled.org/developers/syndication/
8146         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
8147         if ($format ne 'rss' && $format ne 'atom') {
8148                 die_error(400, "Unknown web feed format");
8149         }
8150
8151         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
8152         my $head = $hash || 'HEAD';
8153         my @commitlist = parse_commits($head, 150, 0, $file_name);
8154
8155         my %latest_commit;
8156         my %latest_date;
8157         my $content_type = "application/$format+xml";
8158         if (defined $cgi->http('HTTP_ACCEPT') &&
8159                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
8160                 # browser (feed reader) prefers text/xml
8161                 $content_type = 'text/xml';
8162         }
8163         if (defined($commitlist[0])) {
8164                 %latest_commit = %{$commitlist[0]};
8165                 my $latest_epoch = $latest_commit{'committer_epoch'};
8166                 exit_if_unmodified_since($latest_epoch);
8167                 %latest_date = parse_date($latest_epoch, $latest_commit{'committer_tz'});
8168         }
8169         print $cgi->header(
8170                 -type => $content_type,
8171                 -charset => 'utf-8',
8172                 %latest_date ? (-last_modified => $latest_date{'rfc2822'}) : (),
8173                 -status => '200 OK');
8174
8175         # Optimization: skip generating the body if client asks only
8176         # for Last-Modified date.
8177         return if ($cgi->request_method() eq 'HEAD');
8178
8179         # header variables
8180         my $title = "$site_name - $project/$action";
8181         my $feed_type = 'log';
8182         if (defined $hash) {
8183                 $title .= " - '$hash'";
8184                 $feed_type = 'branch log';
8185                 if (defined $file_name) {
8186                         $title .= " :: $file_name";
8187                         $feed_type = 'history';
8188                 }
8189         } elsif (defined $file_name) {
8190                 $title .= " - $file_name";
8191                 $feed_type = 'history';
8192         }
8193         $title .= " $feed_type";
8194         $title = esc_html($title);
8195         my $descr = git_get_project_description($project);
8196         if (defined $descr) {
8197                 $descr = esc_html($descr);
8198         } else {
8199                 $descr = "$project " .
8200                          ($format eq 'rss' ? 'RSS' : 'Atom') .
8201                          " feed";
8202         }
8203         my $owner = git_get_project_owner($project);
8204         $owner = esc_html($owner);
8205
8206         #header
8207         my $alt_url;
8208         if (defined $file_name) {
8209                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
8210         } elsif (defined $hash) {
8211                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
8212         } else {
8213                 $alt_url = href(-full=>1, action=>"summary");
8214         }
8215         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
8216         if ($format eq 'rss') {
8217                 print <<XML;
8218 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
8219 <channel>
8220 XML
8221                 print "<title>$title</title>\n" .
8222                       "<link>$alt_url</link>\n" .
8223                       "<description>$descr</description>\n" .
8224                       "<language>en</language>\n" .
8225                       # project owner is responsible for 'editorial' content
8226                       "<managingEditor>$owner</managingEditor>\n";
8227                 if (defined $logo || defined $favicon) {
8228                         # prefer the logo to the favicon, since RSS
8229                         # doesn't allow both
8230                         my $img = esc_url($logo || $favicon);
8231                         print "<image>\n" .
8232                               "<url>$img</url>\n" .
8233                               "<title>$title</title>\n" .
8234                               "<link>$alt_url</link>\n" .
8235                               "</image>\n";
8236                 }
8237                 if (%latest_date) {
8238                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
8239                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
8240                 }
8241                 print "<generator>gitweb v.$version/$git_version</generator>\n";
8242         } elsif ($format eq 'atom') {
8243                 print <<XML;
8244 <feed xmlns="http://www.w3.org/2005/Atom">
8245 XML
8246                 print "<title>$title</title>\n" .
8247                       "<subtitle>$descr</subtitle>\n" .
8248                       '<link rel="alternate" type="text/html" href="' .
8249                       $alt_url . '" />' . "\n" .
8250                       '<link rel="self" type="' . $content_type . '" href="' .
8251                       $cgi->self_url() . '" />' . "\n" .
8252                       "<id>" . href(-full=>1) . "</id>\n" .
8253                       # use project owner for feed author
8254                       "<author><name>$owner</name></author>\n";
8255                 if (defined $favicon) {
8256                         print "<icon>" . esc_url($favicon) . "</icon>\n";
8257                 }
8258                 if (defined $logo) {
8259                         # not twice as wide as tall: 72 x 27 pixels
8260                         print "<logo>" . esc_url($logo) . "</logo>\n";
8261                 }
8262                 if (! %latest_date) {
8263                         # dummy date to keep the feed valid until commits trickle in:
8264                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
8265                 } else {
8266                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
8267                 }
8268                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
8269         }
8270
8271         # contents
8272         for (my $i = 0; $i <= $#commitlist; $i++) {
8273                 my %co = %{$commitlist[$i]};
8274                 my $commit = $co{'id'};
8275                 # we read 150, we always show 30 and the ones more recent than 48 hours
8276                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
8277                         last;
8278                 }
8279                 my %cd = parse_date($co{'author_epoch'}, $co{'author_tz'});
8280
8281                 # get list of changed files
8282                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
8283                         $co{'parent'} || "--root",
8284                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
8285                         or next;
8286                 my @difftree = map { chomp; $_ } <$fd>;
8287                 close $fd
8288                         or next;
8289
8290                 # print element (entry, item)
8291                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
8292                 if ($format eq 'rss') {
8293                         print "<item>\n" .
8294                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
8295                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
8296                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
8297                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
8298                               "<link>$co_url</link>\n" .
8299                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
8300                               "<content:encoded>" .
8301                               "<![CDATA[\n";
8302                 } elsif ($format eq 'atom') {
8303                         print "<entry>\n" .
8304                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
8305                               "<updated>$cd{'iso-8601'}</updated>\n" .
8306                               "<author>\n" .
8307                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
8308                         if ($co{'author_email'}) {
8309                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
8310                         }
8311                         print "</author>\n" .
8312                               # use committer for contributor
8313                               "<contributor>\n" .
8314                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
8315                         if ($co{'committer_email'}) {
8316                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
8317                         }
8318                         print "</contributor>\n" .
8319                               "<published>$cd{'iso-8601'}</published>\n" .
8320                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
8321                               "<id>$co_url</id>\n" .
8322                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
8323                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
8324                 }
8325                 my $comment = $co{'comment'};
8326                 print "<pre>\n";
8327                 foreach my $line (@$comment) {
8328                         $line = esc_html($line);
8329                         print "$line\n";
8330                 }
8331                 print "</pre><ul>\n";
8332                 foreach my $difftree_line (@difftree) {
8333                         my %difftree = parse_difftree_raw_line($difftree_line);
8334                         next if !$difftree{'from_id'};
8335
8336                         my $file = $difftree{'file'} || $difftree{'to_file'};
8337
8338                         print "<li>" .
8339                               "[" .
8340                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
8341                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
8342                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
8343                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
8344                                       -title => "diff"}, 'D');
8345                         if ($have_blame) {
8346                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
8347                                                              file_name=>$file, hash_base=>$commit),
8348                                               -title => "blame"}, 'B');
8349                         }
8350                         # if this is not a feed of a file history
8351                         if (!defined $file_name || $file_name ne $file) {
8352                                 print $cgi->a({-href => href(-full=>1, action=>"history",
8353                                                              file_name=>$file, hash=>$commit),
8354                                               -title => "history"}, 'H');
8355                         }
8356                         $file = esc_path($file);
8357                         print "] ".
8358                               "$file</li>\n";
8359                 }
8360                 if ($format eq 'rss') {
8361                         print "</ul>]]>\n" .
8362                               "</content:encoded>\n" .
8363                               "</item>\n";
8364                 } elsif ($format eq 'atom') {
8365                         print "</ul>\n</div>\n" .
8366                               "</content>\n" .
8367                               "</entry>\n";
8368                 }
8369         }
8370
8371         # end of feed
8372         if ($format eq 'rss') {
8373                 print "</channel>\n</rss>\n";
8374         } elsif ($format eq 'atom') {
8375                 print "</feed>\n";
8376         }
8377 }
8378
8379 sub git_rss {
8380         git_feed('rss');
8381 }
8382
8383 sub git_atom {
8384         git_feed('atom');
8385 }
8386
8387 sub git_opml {
8388         my @list = git_get_projects_list($project_filter, $strict_export);
8389         if (!@list) {
8390                 die_error(404, "No projects found");
8391         }
8392
8393         print $cgi->header(
8394                 -type => 'text/xml',
8395                 -charset => 'utf-8',
8396                 -content_disposition => 'inline; filename="opml.xml"');
8397
8398         my $title = esc_html($site_name);
8399         my $filter = " within subdirectory ";
8400         if (defined $project_filter) {
8401                 $filter .= esc_html($project_filter);
8402         } else {
8403                 $filter = "";
8404         }
8405         print <<XML;
8406 <?xml version="1.0" encoding="utf-8"?>
8407 <opml version="1.0">
8408 <head>
8409   <title>$title OPML Export$filter</title>
8410 </head>
8411 <body>
8412 <outline text="git RSS feeds">
8413 XML
8414
8415         foreach my $pr (@list) {
8416                 my %proj = %$pr;
8417                 my $head = git_get_head_hash($proj{'path'});
8418                 if (!defined $head) {
8419                         next;
8420                 }
8421                 $git_dir = "$projectroot/$proj{'path'}";
8422                 my %co = parse_commit($head);
8423                 if (!%co) {
8424                         next;
8425                 }
8426
8427                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
8428                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
8429                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
8430                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
8431         }
8432         print <<XML;
8433 </outline>
8434 </body>
8435 </opml>
8436 XML
8437 }