gitweb/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 strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 BEGIN {
  22         CGI->compile() if $ENV{'MOD_PERL'};
  23 }
  24
  25 our $cgi = new CGI;
  26 our $version = "++GIT_VERSION++";
  27 our $my_url = $cgi->url();
  28 our $my_uri = $cgi->url(-absolute => 1);
  29
  30 # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  31 # needed and used only for URLs with nonempty PATH_INFO
  32 our $base_url = $my_url;
  33
  34 # When the script is used as DirectoryIndex, the URL does not contain the name
  35 # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  36 # have to do it ourselves. We make $path_info global because it's also used
  37 # later on.
  38 #
  39 # Another issue with the script being the DirectoryIndex is that the resulting
  40 # $my_url data is not the full script URL: this is good, because we want
  41 # generated links to keep implying the script name if it wasn't explicitly
  42 # indicated in the URL we're handling, but it means that $my_url cannot be used
  43 # as base URL.
  44 # Therefore, if we needed to strip PATH_INFO, then we know that we have
  45 # to build the base URL ourselves:
  46 our $path_info = $ENV{"PATH_INFO"};
  47 if ($path_info) {
  48         if ($my_url =~ s,\Q$path_info\E$,, &&
  49             $my_uri =~ s,\Q$path_info\E$,, &&
  50             defined $ENV{'SCRIPT_NAME'}) {
  51                 $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  52         }
  53 }
  54
  55 # core git executable to use
  56 # this can just be "git" if your webserver has a sensible PATH
  57 our $GIT = "++GIT_BINDIR++/git";
  58
  59 # absolute fs-path which will be prepended to the project path
  60 #our $projectroot = "/pub/scm";
  61 our $projectroot = "++GITWEB_PROJECTROOT++";
  62
  63 # fs traversing limit for getting project list
  64 # the number is relative to the projectroot
  65 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  66
  67 # target of the home link on top of all pages
  68 our $home_link = $my_uri || "/";
  69
  70 # string of the home link on top of all pages
  71 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  72
  73 # name of your site or organization to appear in page titles
  74 # replace this with something more descriptive for clearer bookmarks
  75 our $site_name = "++GITWEB_SITENAME++"
  76                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  77
  78 # filename of html text to include at top of each page
  79 our $site_header = "++GITWEB_SITE_HEADER++";
  80 # html text to include at home page
  81 our $home_text = "++GITWEB_HOMETEXT++";
  82 # filename of html text to include at bottom of each page
  83 our $site_footer = "++GITWEB_SITE_FOOTER++";
  84
  85 # URI of stylesheets
  86 our @stylesheets = ("++GITWEB_CSS++");
  87 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  88 our $stylesheet = undef;
  89 # URI of GIT logo (72x27 size)
  90 our $logo = "++GITWEB_LOGO++";
  91 # URI of GIT favicon, assumed to be image/png type
  92 our $favicon = "++GITWEB_FAVICON++";
  93
  94 # URI and label (title) of GIT logo link
  95 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  96 #our $logo_label = "git documentation";
  97 our $logo_url = "http://git.or.cz/";
  98 our $logo_label = "git homepage";
  99
 100 # source of projects list
 101 our $projects_list = "++GITWEB_LIST++";
 102
 103 # the width (in characters) of the projects list "Description" column
 104 our $projects_list_description_width = 25;
 105
 106 # default order of projects list
 107 # valid values are none, project, descr, owner, and age
 108 our $default_projects_order = "project";
 109
 110 # show repository only if this file exists
 111 # (only effective if this variable evaluates to true)
 112 our $export_ok = "++GITWEB_EXPORT_OK++";
 113
 114 # show repository only if this subroutine returns true
 115 # when given the path to the project, for example:
 116 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 117 our $export_auth_hook = undef;
 118
 119 # only allow viewing of repositories also shown on the overview page
 120 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 121
 122 # list of git base URLs used for URL to where fetch project from,
 123 # i.e. full URL is "$git_base_url/$project"
 124 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 125
 126 # default blob_plain mimetype and default charset for text/plain blob
 127 our $default_blob_plain_mimetype = 'text/plain';
 128 our $default_text_plain_charset  = undef;
 129
 130 # file to use for guessing MIME types before trying /etc/mime.types
 131 # (relative to the current git repository)
 132 our $mimetypes_file = undef;
 133
 134 # assume this charset if line contains non-UTF-8 characters;
 135 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 136 # for which encoding all byte sequences are valid, for example
 137 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 138 # could be even 'utf-8' for the old behavior)
 139 our $fallback_encoding = 'latin1';
 140
 141 # rename detection options for git-diff and git-diff-tree
 142 # - default is '-M', with the cost proportional to
 143 #   (number of removed files) * (number of new files).
 144 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 145 #   (number of changed files + number of removed files) * (number of new files)
 146 # - even more costly is '-C', '--find-copies-harder' with cost
 147 #   (number of files in the original tree) * (number of new files)
 148 # - one might want to include '-B' option, e.g. '-B', '-M'
 149 our @diff_opts = ('-M'); # taken from git_commit
 150
 151 # Disables features that would allow repository owners to inject script into
 152 # the gitweb domain.
 153 our $prevent_xss = 0;
 154
 155 # information about snapshot formats that gitweb is capable of serving
 156 our %known_snapshot_formats = (
 157         # name => {
 158         #       'display' => display name,
 159         #       'type' => mime type,
 160         #       'suffix' => filename suffix,
 161         #       'format' => --format for git-archive,
 162         #       'compressor' => [compressor command and arguments]
 163         #                       (array reference, optional)}
 164         #
 165         'tgz' => {
 166                 'display' => 'tar.gz',
 167                 'type' => 'application/x-gzip',
 168                 'suffix' => '.tar.gz',
 169                 'format' => 'tar',
 170                 'compressor' => ['gzip']},
 171
 172         'tbz2' => {
 173                 'display' => 'tar.bz2',
 174                 'type' => 'application/x-bzip2',
 175                 'suffix' => '.tar.bz2',
 176                 'format' => 'tar',
 177                 'compressor' => ['bzip2']},
 178
 179         'zip' => {
 180                 'display' => 'zip',
 181                 'type' => 'application/x-zip',
 182                 'suffix' => '.zip',
 183                 'format' => 'zip'},
 184 );
 185
 186 # Aliases so we understand old gitweb.snapshot values in repository
 187 # configuration.
 188 our %known_snapshot_format_aliases = (
 189         'gzip'  => 'tgz',
 190         'bzip2' => 'tbz2',
 191
 192         # backward compatibility: legacy gitweb config support
 193         'x-gzip' => undef, 'gz' => undef,
 194         'x-bzip2' => undef, 'bz2' => undef,
 195         'x-zip' => undef, '' => undef,
 196 );
 197
 198 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 199 # are changed, it may be appropriate to change these values too via
 200 # $GITWEB_CONFIG.
 201 our %avatar_size = (
 202         'default' => 16,
 203         'double'  => 32
 204 );
 205
 206 # You define site-wide feature defaults here; override them with
 207 # $GITWEB_CONFIG as necessary.
 208 our %feature = (
 209         # feature => {
 210         #       'sub' => feature-sub (subroutine),
 211         #       'override' => allow-override (boolean),
 212         #       'default' => [ default options...] (array reference)}
 213         #
 214         # if feature is overridable (it means that allow-override has true value),
 215         # then feature-sub will be called with default options as parameters;
 216         # return value of feature-sub indicates if to enable specified feature
 217         #
 218         # if there is no 'sub' key (no feature-sub), then feature cannot be
 219         # overriden
 220         #
 221         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 222         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 223         # is enabled
 224
 225         # Enable the 'blame' blob view, showing the last commit that modified
 226         # each line in the file. This can be very CPU-intensive.
 227
 228         # To enable system wide have in $GITWEB_CONFIG
 229         # $feature{'blame'}{'default'} = [1];
 230         # To have project specific config enable override in $GITWEB_CONFIG
 231         # $feature{'blame'}{'override'} = 1;
 232         # and in project config gitweb.blame = 0|1;
 233         'blame' => {
 234                 'sub' => sub { feature_bool('blame', @_) },
 235                 'override' => 0,
 236                 'default' => [0]},
 237
 238         # Enable the 'snapshot' link, providing a compressed archive of any
 239         # tree. This can potentially generate high traffic if you have large
 240         # project.
 241
 242         # Value is a list of formats defined in %known_snapshot_formats that
 243         # you wish to offer.
 244         # To disable system wide have in $GITWEB_CONFIG
 245         # $feature{'snapshot'}{'default'} = [];
 246         # To have project specific config enable override in $GITWEB_CONFIG
 247         # $feature{'snapshot'}{'override'} = 1;
 248         # and in project config, a comma-separated list of formats or "none"
 249         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 250         'snapshot' => {
 251                 'sub' => \&feature_snapshot,
 252                 'override' => 0,
 253                 'default' => ['tgz']},
 254
 255         # Enable text search, which will list the commits which match author,
 256         # committer or commit text to a given string.  Enabled by default.
 257         # Project specific override is not supported.
 258         'search' => {
 259                 'override' => 0,
 260                 'default' => [1]},
 261
 262         # Enable grep search, which will list the files in currently selected
 263         # tree containing the given string. Enabled by default. This can be
 264         # potentially CPU-intensive, of course.
 265
 266         # To enable system wide have in $GITWEB_CONFIG
 267         # $feature{'grep'}{'default'} = [1];
 268         # To have project specific config enable override in $GITWEB_CONFIG
 269         # $feature{'grep'}{'override'} = 1;
 270         # and in project config gitweb.grep = 0|1;
 271         'grep' => {
 272                 'sub' => sub { feature_bool('grep', @_) },
 273                 'override' => 0,
 274                 'default' => [1]},
 275
 276         # Enable the pickaxe search, which will list the commits that modified
 277         # a given string in a file. This can be practical and quite faster
 278         # alternative to 'blame', but still potentially CPU-intensive.
 279
 280         # To enable system wide have in $GITWEB_CONFIG
 281         # $feature{'pickaxe'}{'default'} = [1];
 282         # To have project specific config enable override in $GITWEB_CONFIG
 283         # $feature{'pickaxe'}{'override'} = 1;
 284         # and in project config gitweb.pickaxe = 0|1;
 285         'pickaxe' => {
 286                 'sub' => sub { feature_bool('pickaxe', @_) },
 287                 'override' => 0,
 288                 'default' => [1]},
 289
 290         # Make gitweb use an alternative format of the URLs which can be
 291         # more readable and natural-looking: project name is embedded
 292         # directly in the path and the query string contains other
 293         # auxiliary information. All gitweb installations recognize
 294         # URL in either format; this configures in which formats gitweb
 295         # generates links.
 296
 297         # To enable system wide have in $GITWEB_CONFIG
 298         # $feature{'pathinfo'}{'default'} = [1];
 299         # Project specific override is not supported.
 300
 301         # Note that you will need to change the default location of CSS,
 302         # favicon, logo and possibly other files to an absolute URL. Also,
 303         # if gitweb.cgi serves as your indexfile, you will need to force
 304         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 305         'pathinfo' => {
 306                 'override' => 0,
 307                 'default' => [0]},
 308
 309         # Make gitweb consider projects in project root subdirectories
 310         # to be forks of existing projects. Given project $projname.git,
 311         # projects matching $projname/*.git will not be shown in the main
 312         # projects list, instead a '+' mark will be added to $projname
 313         # there and a 'forks' view will be enabled for the project, listing
 314         # all the forks. If project list is taken from a file, forks have
 315         # to be listed after the main project.
 316
 317         # To enable system wide have in $GITWEB_CONFIG
 318         # $feature{'forks'}{'default'} = [1];
 319         # Project specific override is not supported.
 320         'forks' => {
 321                 'override' => 0,
 322                 'default' => [0]},
 323
 324         # Insert custom links to the action bar of all project pages.
 325         # This enables you mainly to link to third-party scripts integrating
 326         # into gitweb; e.g. git-browser for graphical history representation
 327         # or custom web-based repository administration interface.
 328
 329         # The 'default' value consists of a list of triplets in the form
 330         # (label, link, position) where position is the label after which
 331         # to insert the link and link is a format string where %n expands
 332         # to the project name, %f to the project path within the filesystem,
 333         # %h to the current hash (h gitweb parameter) and %b to the current
 334         # hash base (hb gitweb parameter); %% expands to %.
 335
 336         # To enable system wide have in $GITWEB_CONFIG e.g.
 337         # $feature{'actions'}{'default'} = [('graphiclog',
 338         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 339         # Project specific override is not supported.
 340         'actions' => {
 341                 'override' => 0,
 342                 'default' => []},
 343
 344         # Allow gitweb scan project content tags described in ctags/
 345         # of project repository, and display the popular Web 2.0-ish
 346         # "tag cloud" near the project list. Note that this is something
 347         # COMPLETELY different from the normal Git tags.
 348
 349         # gitweb by itself can show existing tags, but it does not handle
 350         # tagging itself; you need an external application for that.
 351         # For an example script, check Girocco's cgi/tagproj.cgi.
 352         # You may want to install the HTML::TagCloud Perl module to get
 353         # a pretty tag cloud instead of just a list of tags.
 354
 355         # To enable system wide have in $GITWEB_CONFIG
 356         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 357         # Project specific override is not supported.
 358         'ctags' => {
 359                 'override' => 0,
 360                 'default' => [0]},
 361
 362         # The maximum number of patches in a patchset generated in patch
 363         # view. Set this to 0 or undef to disable patch view, or to a
 364         # negative number to remove any limit.
 365
 366         # To disable system wide have in $GITWEB_CONFIG
 367         # $feature{'patches'}{'default'} = [0];
 368         # To have project specific config enable override in $GITWEB_CONFIG
 369         # $feature{'patches'}{'override'} = 1;
 370         # and in project config gitweb.patches = 0|n;
 371         # where n is the maximum number of patches allowed in a patchset.
 372         'patches' => {
 373                 'sub' => \&feature_patches,
 374                 'override' => 0,
 375                 'default' => [16]},
 376
 377         # Avatar support. When this feature is enabled, views such as
 378         # shortlog or commit will display an avatar associated with
 379         # the email of the committer(s) and/or author(s).
 380
 381         # Currently only the gravatar provider is available, and it
 382         # depends on Digest::MD5. If an unknown provider is specified,
 383         # the feature is disabled.
 384
 385         # To enable system wide have in $GITWEB_CONFIG
 386         # $feature{'avatar'}{'default'} = ['gravatar'];
 387         # To have project specific config enable override in $GITWEB_CONFIG
 388         # $feature{'avatar'}{'override'} = 1;
 389         # and in project config gitweb.avatar = gravatar;
 390         'avatar' => {
 391                 'sub' => \&feature_avatar,
 392                 'override' => 0,
 393                 'default' => ['']},
 394 );
 395
 396 sub gitweb_get_feature {
 397         my ($name) = @_;
 398         return unless exists $feature{$name};
 399         my ($sub, $override, @defaults) = (
 400                 $feature{$name}{'sub'},
 401                 $feature{$name}{'override'},
 402                 @{$feature{$name}{'default'}});
 403         if (!$override) { return @defaults; }
 404         if (!defined $sub) {
 405                 warn "feature $name is not overrideable";
 406                 return @defaults;
 407         }
 408         return $sub->(@defaults);
 409 }
 410
 411 # A wrapper to check if a given feature is enabled.
 412 # With this, you can say
 413 #
 414 #   my $bool_feat = gitweb_check_feature('bool_feat');
 415 #   gitweb_check_feature('bool_feat') or somecode;
 416 #
 417 # instead of
 418 #
 419 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 420 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 421 #
 422 sub gitweb_check_feature {
 423         return (gitweb_get_feature(@_))[0];
 424 }
 425
 426
 427 sub feature_bool {
 428         my $key = shift;
 429         my ($val) = git_get_project_config($key, '--bool');
 430
 431         if (!defined $val) {
 432                 return ($_[0]);
 433         } elsif ($val eq 'true') {
 434                 return (1);
 435         } elsif ($val eq 'false') {
 436                 return (0);
 437         }
 438 }
 439
 440 sub feature_snapshot {
 441         my (@fmts) = @_;
 442
 443         my ($val) = git_get_project_config('snapshot');
 444
 445         if ($val) {
 446                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 447         }
 448
 449         return @fmts;
 450 }
 451
 452 sub feature_patches {
 453         my @val = (git_get_project_config('patches', '--int'));
 454
 455         if (@val) {
 456                 return @val;
 457         }
 458
 459         return ($_[0]);
 460 }
 461
 462 sub feature_avatar {
 463         my @val = (git_get_project_config('avatar'));
 464
 465         return @val ? @val : @_;
 466 }
 467
 468 # checking HEAD file with -e is fragile if the repository was
 469 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 470 # and then pruned.
 471 sub check_head_link {
 472         my ($dir) = @_;
 473         my $headfile = "$dir/HEAD";
 474         return ((-e $headfile) ||
 475                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 476 }
 477
 478 sub check_export_ok {
 479         my ($dir) = @_;
 480         return (check_head_link($dir) &&
 481                 (!$export_ok || -e "$dir/$export_ok") &&
 482                 (!$export_auth_hook || $export_auth_hook->($dir)));
 483 }
 484
 485 # process alternate names for backward compatibility
 486 # filter out unsupported (unknown) snapshot formats
 487 sub filter_snapshot_fmts {
 488         my @fmts = @_;
 489
 490         @fmts = map {
 491                 exists $known_snapshot_format_aliases{$_} ?
 492                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 493         @fmts = grep {
 494                 exists $known_snapshot_formats{$_} } @fmts;
 495 }
 496
 497 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 498 if (-e $GITWEB_CONFIG) {
 499         do $GITWEB_CONFIG;
 500 } else {
 501         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 502         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 503 }
 504
 505 # version of the core git binary
 506 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 507
 508 $projects_list ||= $projectroot;
 509
 510 # ======================================================================
 511 # input validation and dispatch
 512
 513 # input parameters can be collected from a variety of sources (presently, CGI
 514 # and PATH_INFO), so we define an %input_params hash that collects them all
 515 # together during validation: this allows subsequent uses (e.g. href()) to be
 516 # agnostic of the parameter origin
 517
 518 our %input_params = ();
 519
 520 # input parameters are stored with the long parameter name as key. This will
 521 # also be used in the href subroutine to convert parameters to their CGI
 522 # equivalent, and since the href() usage is the most frequent one, we store
 523 # the name -> CGI key mapping here, instead of the reverse.
 524 #
 525 # XXX: Warning: If you touch this, check the search form for updating,
 526 # too.
 527
 528 our @cgi_param_mapping = (
 529         project => "p",
 530         action => "a",
 531         file_name => "f",
 532         file_parent => "fp",
 533         hash => "h",
 534         hash_parent => "hp",
 535         hash_base => "hb",
 536         hash_parent_base => "hpb",
 537         page => "pg",
 538         order => "o",
 539         searchtext => "s",
 540         searchtype => "st",
 541         snapshot_format => "sf",
 542         extra_options => "opt",
 543         search_use_regexp => "sr",
 544 );
 545 our %cgi_param_mapping = @cgi_param_mapping;
 546
 547 # we will also need to know the possible actions, for validation
 548 our %actions = (
 549         "blame" => \&git_blame,
 550         "blobdiff" => \&git_blobdiff,
 551         "blobdiff_plain" => \&git_blobdiff_plain,
 552         "blob" => \&git_blob,
 553         "blob_plain" => \&git_blob_plain,
 554         "commitdiff" => \&git_commitdiff,
 555         "commitdiff_plain" => \&git_commitdiff_plain,
 556         "commit" => \&git_commit,
 557         "forks" => \&git_forks,
 558         "heads" => \&git_heads,
 559         "history" => \&git_history,
 560         "log" => \&git_log,
 561         "patch" => \&git_patch,
 562         "patches" => \&git_patches,
 563         "rss" => \&git_rss,
 564         "atom" => \&git_atom,
 565         "search" => \&git_search,
 566         "search_help" => \&git_search_help,
 567         "shortlog" => \&git_shortlog,
 568         "summary" => \&git_summary,
 569         "tag" => \&git_tag,
 570         "tags" => \&git_tags,
 571         "tree" => \&git_tree,
 572         "snapshot" => \&git_snapshot,
 573         "object" => \&git_object,
 574         # those below don't need $project
 575         "opml" => \&git_opml,
 576         "project_list" => \&git_project_list,
 577         "project_index" => \&git_project_index,
 578 );
 579
 580 # finally, we have the hash of allowed extra_options for the commands that
 581 # allow them
 582 our %allowed_options = (
 583         "--no-merges" => [ qw(rss atom log shortlog history) ],
 584 );
 585
 586 # fill %input_params with the CGI parameters. All values except for 'opt'
 587 # should be single values, but opt can be an array. We should probably
 588 # build an array of parameters that can be multi-valued, but since for the time
 589 # being it's only this one, we just single it out
 590 while (my ($name, $symbol) = each %cgi_param_mapping) {
 591         if ($symbol eq 'opt') {
 592                 $input_params{$name} = [ $cgi->param($symbol) ];
 593         } else {
 594                 $input_params{$name} = $cgi->param($symbol);
 595         }
 596 }
 597
 598 # now read PATH_INFO and update the parameter list for missing parameters
 599 sub evaluate_path_info {
 600         return if defined $input_params{'project'};
 601         return if !$path_info;
 602         $path_info =~ s,^/+,,;
 603         return if !$path_info;
 604
 605         # find which part of PATH_INFO is project
 606         my $project = $path_info;
 607         $project =~ s,/+$,,;
 608         while ($project && !check_head_link("$projectroot/$project")) {
 609                 $project =~ s,/*[^/]*$,,;
 610         }
 611         return unless $project;
 612         $input_params{'project'} = $project;
 613
 614         # do not change any parameters if an action is given using the query string
 615         return if $input_params{'action'};
 616         $path_info =~ s,^\Q$project\E/*,,;
 617
 618         # next, check if we have an action
 619         my $action = $path_info;
 620         $action =~ s,/.*$,,;
 621         if (exists $actions{$action}) {
 622                 $path_info =~ s,^$action/*,,;
 623                 $input_params{'action'} = $action;
 624         }
 625
 626         # list of actions that want hash_base instead of hash, but can have no
 627         # pathname (f) parameter
 628         my @wants_base = (
 629                 'tree',
 630                 'history',
 631         );
 632
 633         # we want to catch
 634         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 635         my ($parentrefname, $parentpathname, $refname, $pathname) =
 636                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 637
 638         # first, analyze the 'current' part
 639         if (defined $pathname) {
 640                 # we got "branch:filename" or "branch:dir/"
 641                 # we could use git_get_type(branch:pathname), but:
 642                 # - it needs $git_dir
 643                 # - it does a git() call
 644                 # - the convention of terminating directories with a slash
 645                 #   makes it superfluous
 646                 # - embedding the action in the PATH_INFO would make it even
 647                 #   more superfluous
 648                 $pathname =~ s,^/+,,;
 649                 if (!$pathname || substr($pathname, -1) eq "/") {
 650                         $input_params{'action'} ||= "tree";
 651                         $pathname =~ s,/$,,;
 652                 } else {
 653                         # the default action depends on whether we had parent info
 654                         # or not
 655                         if ($parentrefname) {
 656                                 $input_params{'action'} ||= "blobdiff_plain";
 657                         } else {
 658                                 $input_params{'action'} ||= "blob_plain";
 659                         }
 660                 }
 661                 $input_params{'hash_base'} ||= $refname;
 662                 $input_params{'file_name'} ||= $pathname;
 663         } elsif (defined $refname) {
 664                 # we got "branch". In this case we have to choose if we have to
 665                 # set hash or hash_base.
 666                 #
 667                 # Most of the actions without a pathname only want hash to be
 668                 # set, except for the ones specified in @wants_base that want
 669                 # hash_base instead. It should also be noted that hand-crafted
 670                 # links having 'history' as an action and no pathname or hash
 671                 # set will fail, but that happens regardless of PATH_INFO.
 672                 $input_params{'action'} ||= "shortlog";
 673                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 674                         $input_params{'hash_base'} ||= $refname;
 675                 } else {
 676                         $input_params{'hash'} ||= $refname;
 677                 }
 678         }
 679
 680         # next, handle the 'parent' part, if present
 681         if (defined $parentrefname) {
 682                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 683                 # someproject/blobdiff/oldrev..newrev:/filename
 684                 if ($parentpathname) {
 685                         $parentpathname =~ s,^/+,,;
 686                         $parentpathname =~ s,/$,,;
 687                         $input_params{'file_parent'} ||= $parentpathname;
 688                 } else {
 689                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 690                 }
 691                 # we assume that hash_parent_base is wanted if a path was specified,
 692                 # or if the action wants hash_base instead of hash
 693                 if (defined $input_params{'file_parent'} ||
 694                         grep { $_ eq $input_params{'action'} } @wants_base) {
 695                         $input_params{'hash_parent_base'} ||= $parentrefname;
 696                 } else {
 697                         $input_params{'hash_parent'} ||= $parentrefname;
 698                 }
 699         }
 700
 701         # for the snapshot action, we allow URLs in the form
 702         # $project/snapshot/$hash.ext
 703         # where .ext determines the snapshot and gets removed from the
 704         # passed $refname to provide the $hash.
 705         #
 706         # To be able to tell that $refname includes the format extension, we
 707         # require the following two conditions to be satisfied:
 708         # - the hash input parameter MUST have been set from the $refname part
 709         #   of the URL (i.e. they must be equal)
 710         # - the snapshot format MUST NOT have been defined already (e.g. from
 711         #   CGI parameter sf)
 712         # It's also useless to try any matching unless $refname has a dot,
 713         # so we check for that too
 714         if (defined $input_params{'action'} &&
 715                 $input_params{'action'} eq 'snapshot' &&
 716                 defined $refname && index($refname, '.') != -1 &&
 717                 $refname eq $input_params{'hash'} &&
 718                 !defined $input_params{'snapshot_format'}) {
 719                 # We loop over the known snapshot formats, checking for
 720                 # extensions. Allowed extensions are both the defined suffix
 721                 # (which includes the initial dot already) and the snapshot
 722                 # format key itself, with a prepended dot
 723                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 724                         my $hash = $refname;
 725                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 726                                 next;
 727                         }
 728                         my $sfx = $1;
 729                         # a valid suffix was found, so set the snapshot format
 730                         # and reset the hash parameter
 731                         $input_params{'snapshot_format'} = $fmt;
 732                         $input_params{'hash'} = $hash;
 733                         # we also set the format suffix to the one requested
 734                         # in the URL: this way a request for e.g. .tgz returns
 735                         # a .tgz instead of a .tar.gz
 736                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 737                         last;
 738                 }
 739         }
 740 }
 741 evaluate_path_info();
 742
 743 our $action = $input_params{'action'};
 744 if (defined $action) {
 745         if (!validate_action($action)) {
 746                 die_error(400, "Invalid action parameter");
 747         }
 748 }
 749
 750 # parameters which are pathnames
 751 our $project = $input_params{'project'};
 752 if (defined $project) {
 753         if (!validate_project($project)) {
 754                 undef $project;
 755                 die_error(404, "No such project");
 756         }
 757 }
 758
 759 our $file_name = $input_params{'file_name'};
 760 if (defined $file_name) {
 761         if (!validate_pathname($file_name)) {
 762                 die_error(400, "Invalid file parameter");
 763         }
 764 }
 765
 766 our $file_parent = $input_params{'file_parent'};
 767 if (defined $file_parent) {
 768         if (!validate_pathname($file_parent)) {
 769                 die_error(400, "Invalid file parent parameter");
 770         }
 771 }
 772
 773 # parameters which are refnames
 774 our $hash = $input_params{'hash'};
 775 if (defined $hash) {
 776         if (!validate_refname($hash)) {
 777                 die_error(400, "Invalid hash parameter");
 778         }
 779 }
 780
 781 our $hash_parent = $input_params{'hash_parent'};
 782 if (defined $hash_parent) {
 783         if (!validate_refname($hash_parent)) {
 784                 die_error(400, "Invalid hash parent parameter");
 785         }
 786 }
 787
 788 our $hash_base = $input_params{'hash_base'};
 789 if (defined $hash_base) {
 790         if (!validate_refname($hash_base)) {
 791                 die_error(400, "Invalid hash base parameter");
 792         }
 793 }
 794
 795 our @extra_options = @{$input_params{'extra_options'}};
 796 # @extra_options is always defined, since it can only be (currently) set from
 797 # CGI, and $cgi->param() returns the empty array in array context if the param
 798 # is not set
 799 foreach my $opt (@extra_options) {
 800         if (not exists $allowed_options{$opt}) {
 801                 die_error(400, "Invalid option parameter");
 802         }
 803         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 804                 die_error(400, "Invalid option parameter for this action");
 805         }
 806 }
 807
 808 our $hash_parent_base = $input_params{'hash_parent_base'};
 809 if (defined $hash_parent_base) {
 810         if (!validate_refname($hash_parent_base)) {
 811                 die_error(400, "Invalid hash parent base parameter");
 812         }
 813 }
 814
 815 # other parameters
 816 our $page = $input_params{'page'};
 817 if (defined $page) {
 818         if ($page =~ m/[^0-9]/) {
 819                 die_error(400, "Invalid page parameter");
 820         }
 821 }
 822
 823 our $searchtype = $input_params{'searchtype'};
 824 if (defined $searchtype) {
 825         if ($searchtype =~ m/[^a-z]/) {
 826                 die_error(400, "Invalid searchtype parameter");
 827         }
 828 }
 829
 830 our $search_use_regexp = $input_params{'search_use_regexp'};
 831
 832 our $searchtext = $input_params{'searchtext'};
 833 our $search_regexp;
 834 if (defined $searchtext) {
 835         if (length($searchtext) < 2) {
 836                 die_error(403, "At least two characters are required for search parameter");
 837         }
 838         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 839 }
 840
 841 # path to the current git repository
 842 our $git_dir;
 843 $git_dir = "$projectroot/$project" if $project;
 844
 845 # list of supported snapshot formats
 846 our @snapshot_fmts = gitweb_get_feature('snapshot');
 847 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 848
 849 # check that the avatar feature is set to a known provider name,
 850 # and for each provider check if the dependencies are satisfied.
 851 # if the provider name is invalid or the dependencies are not met,
 852 # reset $git_avatar to the empty string.
 853 our ($git_avatar) = gitweb_get_feature('avatar');
 854 if ($git_avatar eq 'gravatar') {
 855         $git_avatar = '' unless (eval { require Digest::MD5; 1; });
 856 } else {
 857         $git_avatar = '';
 858 }
 859
 860 # dispatch
 861 if (!defined $action) {
 862         if (defined $hash) {
 863                 $action = git_get_type($hash);
 864         } elsif (defined $hash_base && defined $file_name) {
 865                 $action = git_get_type("$hash_base:$file_name");
 866         } elsif (defined $project) {
 867                 $action = 'summary';
 868         } else {
 869                 $action = 'project_list';
 870         }
 871 }
 872 if (!defined($actions{$action})) {
 873         die_error(400, "Unknown action");
 874 }
 875 if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
 876     !$project) {
 877         die_error(400, "Project needed");
 878 }
 879 $actions{$action}->();
 880 exit;
 881
 882 ## ======================================================================
 883 ## action links
 884
 885 sub href {
 886         my %params = @_;
 887         # default is to use -absolute url() i.e. $my_uri
 888         my $href = $params{-full} ? $my_url : $my_uri;
 889
 890         $params{'project'} = $project unless exists $params{'project'};
 891
 892         if ($params{-replay}) {
 893                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 894                         if (!exists $params{$name}) {
 895                                 $params{$name} = $input_params{$name};
 896                         }
 897                 }
 898         }
 899
 900         my $use_pathinfo = gitweb_check_feature('pathinfo');
 901         if ($use_pathinfo and defined $params{'project'}) {
 902                 # try to put as many parameters as possible in PATH_INFO:
 903                 #   - project name
 904                 #   - action
 905                 #   - hash_parent or hash_parent_base:/file_parent
 906                 #   - hash or hash_base:/filename
 907                 #   - the snapshot_format as an appropriate suffix
 908
 909                 # When the script is the root DirectoryIndex for the domain,
 910                 # $href here would be something like http://gitweb.example.com/
 911                 # Thus, we strip any trailing / from $href, to spare us double
 912                 # slashes in the final URL
 913                 $href =~ s,/$,,;
 914
 915                 # Then add the project name, if present
 916                 $href .= "/".esc_url($params{'project'});
 917                 delete $params{'project'};
 918
 919                 # since we destructively absorb parameters, we keep this
 920                 # boolean that remembers if we're handling a snapshot
 921                 my $is_snapshot = $params{'action'} eq 'snapshot';
 922
 923                 # Summary just uses the project path URL, any other action is
 924                 # added to the URL
 925                 if (defined $params{'action'}) {
 926                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
 927                         delete $params{'action'};
 928                 }
 929
 930                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
 931                 # stripping nonexistent or useless pieces
 932                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
 933                         || $params{'hash_parent'} || $params{'hash'});
 934                 if (defined $params{'hash_base'}) {
 935                         if (defined $params{'hash_parent_base'}) {
 936                                 $href .= esc_url($params{'hash_parent_base'});
 937                                 # skip the file_parent if it's the same as the file_name
 938                                 delete $params{'file_parent'} if $params{'file_parent'} eq $params{'file_name'};
 939                                 if (defined $params{'file_parent'} && $params{'file_parent'} !~ /\.\./) {
 940                                         $href .= ":/".esc_url($params{'file_parent'});
 941                                         delete $params{'file_parent'};
 942                                 }
 943                                 $href .= "..";
 944                                 delete $params{'hash_parent'};
 945                                 delete $params{'hash_parent_base'};
 946                         } elsif (defined $params{'hash_parent'}) {
 947                                 $href .= esc_url($params{'hash_parent'}). "..";
 948                                 delete $params{'hash_parent'};
 949                         }
 950
 951                         $href .= esc_url($params{'hash_base'});
 952                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
 953                                 $href .= ":/".esc_url($params{'file_name'});
 954                                 delete $params{'file_name'};
 955                         }
 956                         delete $params{'hash'};
 957                         delete $params{'hash_base'};
 958                 } elsif (defined $params{'hash'}) {
 959                         $href .= esc_url($params{'hash'});
 960                         delete $params{'hash'};
 961                 }
 962
 963                 # If the action was a snapshot, we can absorb the
 964                 # snapshot_format parameter too
 965                 if ($is_snapshot) {
 966                         my $fmt = $params{'snapshot_format'};
 967                         # snapshot_format should always be defined when href()
 968                         # is called, but just in case some code forgets, we
 969                         # fall back to the default
 970                         $fmt ||= $snapshot_fmts[0];
 971                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
 972                         delete $params{'snapshot_format'};
 973                 }
 974         }
 975
 976         # now encode the parameters explicitly
 977         my @result = ();
 978         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
 979                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
 980                 if (defined $params{$name}) {
 981                         if (ref($params{$name}) eq "ARRAY") {
 982                                 foreach my $par (@{$params{$name}}) {
 983                                         push @result, $symbol . "=" . esc_param($par);
 984                                 }
 985                         } else {
 986                                 push @result, $symbol . "=" . esc_param($params{$name});
 987                         }
 988                 }
 989         }
 990         $href .= "?" . join(';', @result) if scalar @result;
 991
 992         return $href;
 993 }
 994
 995
 996 ## ======================================================================
 997 ## validation, quoting/unquoting and escaping
 998
 999 sub validate_action {
1000         my $input = shift || return undef;
1001         return undef unless exists $actions{$input};
1002         return $input;
1003 }
1004
1005 sub validate_project {
1006         my $input = shift || return undef;
1007         if (!validate_pathname($input) ||
1008                 !(-d "$projectroot/$input") ||
1009                 !check_export_ok("$projectroot/$input") ||
1010                 ($strict_export && !project_in_list($input))) {
1011                 return undef;
1012         } else {
1013                 return $input;
1014         }
1015 }
1016
1017 sub validate_pathname {
1018         my $input = shift || return undef;
1019
1020         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1021         # at the beginning, at the end, and between slashes.
1022         # also this catches doubled slashes
1023         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1024                 return undef;
1025         }
1026         # no null characters
1027         if ($input =~ m!\0!) {
1028                 return undef;
1029         }
1030         return $input;
1031 }
1032
1033 sub validate_refname {
1034         my $input = shift || return undef;
1035
1036         # textual hashes are O.K.
1037         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1038                 return $input;
1039         }
1040         # it must be correct pathname
1041         $input = validate_pathname($input)
1042                 or return undef;
1043         # restrictions on ref name according to git-check-ref-format
1044         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1045                 return undef;
1046         }
1047         return $input;
1048 }
1049
1050 # decode sequences of octets in utf8 into Perl's internal form,
1051 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1052 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1053 sub to_utf8 {
1054         my $str = shift;
1055         if (utf8::valid($str)) {
1056                 utf8::decode($str);
1057                 return $str;
1058         } else {
1059                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1060         }
1061 }
1062
1063 # quote unsafe chars, but keep the slash, even when it's not
1064 # correct, but quoted slashes look too horrible in bookmarks
1065 sub esc_param {
1066         my $str = shift;
1067         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
1068         $str =~ s/\+/%2B/g;
1069         $str =~ s/ /\+/g;
1070         return $str;
1071 }
1072
1073 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1074 sub esc_url {
1075         my $str = shift;
1076         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1077         $str =~ s/\+/%2B/g;
1078         $str =~ s/ /\+/g;
1079         return $str;
1080 }
1081
1082 # replace invalid utf8 character with SUBSTITUTION sequence
1083 sub esc_html {
1084         my $str = shift;
1085         my %opts = @_;
1086
1087         $str = to_utf8($str);
1088         $str = $cgi->escapeHTML($str);
1089         if ($opts{'-nbsp'}) {
1090                 $str =~ s/ /&nbsp;/g;
1091         }
1092         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1093         return $str;
1094 }
1095
1096 # quote control characters and escape filename to HTML
1097 sub esc_path {
1098         my $str = shift;
1099         my %opts = @_;
1100
1101         $str = to_utf8($str);
1102         $str = $cgi->escapeHTML($str);
1103         if ($opts{'-nbsp'}) {
1104                 $str =~ s/ /&nbsp;/g;
1105         }
1106         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1107         return $str;
1108 }
1109
1110 # Make control characters "printable", using character escape codes (CEC)
1111 sub quot_cec {
1112         my $cntrl = shift;
1113         my %opts = @_;
1114         my %es = ( # character escape codes, aka escape sequences
1115                 "\t" => '\t',   # tab            (HT)
1116                 "\n" => '\n',   # line feed      (LF)
1117                 "\r" => '\r',   # carrige return (CR)
1118                 "\f" => '\f',   # form feed      (FF)
1119                 "\b" => '\b',   # backspace      (BS)
1120                 "\a" => '\a',   # alarm (bell)   (BEL)
1121                 "\e" => '\e',   # escape         (ESC)
1122                 "\013" => '\v', # vertical tab   (VT)
1123                 "\000" => '\0', # nul character  (NUL)
1124         );
1125         my $chr = ( (exists $es{$cntrl})
1126                     ? $es{$cntrl}
1127                     : sprintf('\%2x', ord($cntrl)) );
1128         if ($opts{-nohtml}) {
1129                 return $chr;
1130         } else {
1131                 return "<span class=\"cntrl\">$chr</span>";
1132         }
1133 }
1134
1135 # Alternatively use unicode control pictures codepoints,
1136 # Unicode "printable representation" (PR)
1137 sub quot_upr {
1138         my $cntrl = shift;
1139         my %opts = @_;
1140
1141         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1142         if ($opts{-nohtml}) {
1143                 return $chr;
1144         } else {
1145                 return "<span class=\"cntrl\">$chr</span>";
1146         }
1147 }
1148
1149 # git may return quoted and escaped filenames
1150 sub unquote {
1151         my $str = shift;
1152
1153         sub unq {
1154                 my $seq = shift;
1155                 my %es = ( # character escape codes, aka escape sequences
1156                         't' => "\t",   # tab            (HT, TAB)
1157                         'n' => "\n",   # newline        (NL)
1158                         'r' => "\r",   # return         (CR)
1159                         'f' => "\f",   # form feed      (FF)
1160                         'b' => "\b",   # backspace      (BS)
1161                         'a' => "\a",   # alarm (bell)   (BEL)
1162                         'e' => "\e",   # escape         (ESC)
1163                         'v' => "\013", # vertical tab   (VT)
1164                 );
1165
1166                 if ($seq =~ m/^[0-7]{1,3}$/) {
1167                         # octal char sequence
1168                         return chr(oct($seq));
1169                 } elsif (exists $es{$seq}) {
1170                         # C escape sequence, aka character escape code
1171                         return $es{$seq};
1172                 }
1173                 # quoted ordinary character
1174                 return $seq;
1175         }
1176
1177         if ($str =~ m/^"(.*)"$/) {
1178                 # needs unquoting
1179                 $str = $1;
1180                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1181         }
1182         return $str;
1183 }
1184
1185 # escape tabs (convert tabs to spaces)
1186 sub untabify {
1187         my $line = shift;
1188
1189         while ((my $pos = index($line, "\t")) != -1) {
1190                 if (my $count = (8 - ($pos % 8))) {
1191                         my $spaces = ' ' x $count;
1192                         $line =~ s/\t/$spaces/;
1193                 }
1194         }
1195
1196         return $line;
1197 }
1198
1199 sub project_in_list {
1200         my $project = shift;
1201         my @list = git_get_projects_list();
1202         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1203 }
1204
1205 ## ----------------------------------------------------------------------
1206 ## HTML aware string manipulation
1207
1208 # Try to chop given string on a word boundary between position
1209 # $len and $len+$add_len. If there is no word boundary there,
1210 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1211 # (marking chopped part) would be longer than given string.
1212 sub chop_str {
1213         my $str = shift;
1214         my $len = shift;
1215         my $add_len = shift || 10;
1216         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1217
1218         # Make sure perl knows it is utf8 encoded so we don't
1219         # cut in the middle of a utf8 multibyte char.
1220         $str = to_utf8($str);
1221
1222         # allow only $len chars, but don't cut a word if it would fit in $add_len
1223         # if it doesn't fit, cut it if it's still longer than the dots we would add
1224         # remove chopped character entities entirely
1225
1226         # when chopping in the middle, distribute $len into left and right part
1227         # return early if chopping wouldn't make string shorter
1228         if ($where eq 'center') {
1229                 return $str if ($len + 5 >= length($str)); # filler is length 5
1230                 $len = int($len/2);
1231         } else {
1232                 return $str if ($len + 4 >= length($str)); # filler is length 4
1233         }
1234
1235         # regexps: ending and beginning with word part up to $add_len
1236         my $endre = qr/.{$len}\w{0,$add_len}/;
1237         my $begre = qr/\w{0,$add_len}.{$len}/;
1238
1239         if ($where eq 'left') {
1240                 $str =~ m/^(.*?)($begre)$/;
1241                 my ($lead, $body) = ($1, $2);
1242                 if (length($lead) > 4) {
1243                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
1244                         $lead = " ...";
1245                 }
1246                 return "$lead$body";
1247
1248         } elsif ($where eq 'center') {
1249                 $str =~ m/^($endre)(.*)$/;
1250                 my ($left, $str)  = ($1, $2);
1251                 $str =~ m/^(.*?)($begre)$/;
1252                 my ($mid, $right) = ($1, $2);
1253                 if (length($mid) > 5) {
1254                         $left  =~ s/&[^;]*$//;
1255                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
1256                         $mid = " ... ";
1257                 }
1258                 return "$left$mid$right";
1259
1260         } else {
1261                 $str =~ m/^($endre)(.*)$/;
1262                 my $body = $1;
1263                 my $tail = $2;
1264                 if (length($tail) > 4) {
1265                         $body =~ s/&[^;]*$//;
1266                         $tail = "... ";
1267                 }
1268                 return "$body$tail";
1269         }
1270 }
1271
1272 # takes the same arguments as chop_str, but also wraps a <span> around the
1273 # result with a title attribute if it does get chopped. Additionally, the
1274 # string is HTML-escaped.
1275 sub chop_and_escape_str {
1276         my ($str) = @_;
1277
1278         my $chopped = chop_str(@_);
1279         if ($chopped eq $str) {
1280                 return esc_html($chopped);
1281         } else {
1282                 $str =~ s/[[:cntrl:]]/?/g;
1283                 return $cgi->span({-title=>$str}, esc_html($chopped));
1284         }
1285 }
1286
1287 ## ----------------------------------------------------------------------
1288 ## functions returning short strings
1289
1290 # CSS class for given age value (in seconds)
1291 sub age_class {
1292         my $age = shift;
1293
1294         if (!defined $age) {
1295                 return "noage";
1296         } elsif ($age < 60*60*2) {
1297                 return "age0";
1298         } elsif ($age < 60*60*24*2) {
1299                 return "age1";
1300         } else {
1301                 return "age2";
1302         }
1303 }
1304
1305 # convert age in seconds to "nn units ago" string
1306 sub age_string {
1307         my $age = shift;
1308         my $age_str;
1309
1310         if ($age > 60*60*24*365*2) {
1311                 $age_str = (int $age/60/60/24/365);
1312                 $age_str .= " years ago";
1313         } elsif ($age > 60*60*24*(365/12)*2) {
1314                 $age_str = int $age/60/60/24/(365/12);
1315                 $age_str .= " months ago";
1316         } elsif ($age > 60*60*24*7*2) {
1317                 $age_str = int $age/60/60/24/7;
1318                 $age_str .= " weeks ago";
1319         } elsif ($age > 60*60*24*2) {
1320                 $age_str = int $age/60/60/24;
1321                 $age_str .= " days ago";
1322         } elsif ($age > 60*60*2) {
1323                 $age_str = int $age/60/60;
1324                 $age_str .= " hours ago";
1325         } elsif ($age > 60*2) {
1326                 $age_str = int $age/60;
1327                 $age_str .= " min ago";
1328         } elsif ($age > 2) {
1329                 $age_str = int $age;
1330                 $age_str .= " sec ago";
1331         } else {
1332                 $age_str .= " right now";
1333         }
1334         return $age_str;
1335 }
1336
1337 use constant {
1338         S_IFINVALID => 0030000,
1339         S_IFGITLINK => 0160000,
1340 };
1341
1342 # submodule/subproject, a commit object reference
1343 sub S_ISGITLINK {
1344         my $mode = shift;
1345
1346         return (($mode & S_IFMT) == S_IFGITLINK)
1347 }
1348
1349 # convert file mode in octal to symbolic file mode string
1350 sub mode_str {
1351         my $mode = oct shift;
1352
1353         if (S_ISGITLINK($mode)) {
1354                 return 'm---------';
1355         } elsif (S_ISDIR($mode & S_IFMT)) {
1356                 return 'drwxr-xr-x';
1357         } elsif (S_ISLNK($mode)) {
1358                 return 'lrwxrwxrwx';
1359         } elsif (S_ISREG($mode)) {
1360                 # git cares only about the executable bit
1361                 if ($mode & S_IXUSR) {
1362                         return '-rwxr-xr-x';
1363                 } else {
1364                         return '-rw-r--r--';
1365                 };
1366         } else {
1367                 return '----------';
1368         }
1369 }
1370
1371 # convert file mode in octal to file type string
1372 sub file_type {
1373         my $mode = shift;
1374
1375         if ($mode !~ m/^[0-7]+$/) {
1376                 return $mode;
1377         } else {
1378                 $mode = oct $mode;
1379         }
1380
1381         if (S_ISGITLINK($mode)) {
1382                 return "submodule";
1383         } elsif (S_ISDIR($mode & S_IFMT)) {
1384                 return "directory";
1385         } elsif (S_ISLNK($mode)) {
1386                 return "symlink";
1387         } elsif (S_ISREG($mode)) {
1388                 return "file";
1389         } else {
1390                 return "unknown";
1391         }
1392 }
1393
1394 # convert file mode in octal to file type description string
1395 sub file_type_long {
1396         my $mode = shift;
1397
1398         if ($mode !~ m/^[0-7]+$/) {
1399                 return $mode;
1400         } else {
1401                 $mode = oct $mode;
1402         }
1403
1404         if (S_ISGITLINK($mode)) {
1405                 return "submodule";
1406         } elsif (S_ISDIR($mode & S_IFMT)) {
1407                 return "directory";
1408         } elsif (S_ISLNK($mode)) {
1409                 return "symlink";
1410         } elsif (S_ISREG($mode)) {
1411                 if ($mode & S_IXUSR) {
1412                         return "executable";
1413                 } else {
1414                         return "file";
1415                 };
1416         } else {
1417                 return "unknown";
1418         }
1419 }
1420
1421
1422 ## ----------------------------------------------------------------------
1423 ## functions returning short HTML fragments, or transforming HTML fragments
1424 ## which don't belong to other sections
1425
1426 # format line of commit message.
1427 sub format_log_line_html {
1428         my $line = shift;
1429
1430         $line = esc_html($line, -nbsp=>1);
1431         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1432                 $cgi->a({-href => href(action=>"object", hash=>$1),
1433                                         -class => "text"}, $1);
1434         }eg;
1435
1436         return $line;
1437 }
1438
1439 # format marker of refs pointing to given object
1440
1441 # the destination action is chosen based on object type and current context:
1442 # - for annotated tags, we choose the tag view unless it's the current view
1443 #   already, in which case we go to shortlog view
1444 # - for other refs, we keep the current view if we're in history, shortlog or
1445 #   log view, and select shortlog otherwise
1446 sub format_ref_marker {
1447         my ($refs, $id) = @_;
1448         my $markers = '';
1449
1450         if (defined $refs->{$id}) {
1451                 foreach my $ref (@{$refs->{$id}}) {
1452                         # this code exploits the fact that non-lightweight tags are the
1453                         # only indirect objects, and that they are the only objects for which
1454                         # we want to use tag instead of shortlog as action
1455                         my ($type, $name) = qw();
1456                         my $indirect = ($ref =~ s/\^\{\}$//);
1457                         # e.g. tags/v2.6.11 or heads/next
1458                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1459                                 $type = $1;
1460                                 $name = $2;
1461                         } else {
1462                                 $type = "ref";
1463                                 $name = $ref;
1464                         }
1465
1466                         my $class = $type;
1467                         $class .= " indirect" if $indirect;
1468
1469                         my $dest_action = "shortlog";
1470
1471                         if ($indirect) {
1472                                 $dest_action = "tag" unless $action eq "tag";
1473                         } elsif ($action =~ /^(history|(short)?log)$/) {
1474                                 $dest_action = $action;
1475                         }
1476
1477                         my $dest = "";
1478                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1479                         $dest .= $ref;
1480
1481                         my $link = $cgi->a({
1482                                 -href => href(
1483                                         action=>$dest_action,
1484                                         hash=>$dest
1485                                 )}, $name);
1486
1487                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1488                                 $link . "</span>";
1489                 }
1490         }
1491
1492         if ($markers) {
1493                 return ' <span class="refs">'. $markers . '</span>';
1494         } else {
1495                 return "";
1496         }
1497 }
1498
1499 # format, perhaps shortened and with markers, title line
1500 sub format_subject_html {
1501         my ($long, $short, $href, $extra) = @_;
1502         $extra = '' unless defined($extra);
1503
1504         if (length($short) < length($long)) {
1505                 $long =~ s/[[:cntrl:]]/?/g;
1506                 return $cgi->a({-href => $href, -class => "list subject",
1507                                 -title => to_utf8($long)},
1508                        esc_html($short) . $extra);
1509         } else {
1510                 return $cgi->a({-href => $href, -class => "list subject"},
1511                        esc_html($long)  . $extra);
1512         }
1513 }
1514
1515 # Insert an avatar for the given $email at the given $size if the feature
1516 # is enabled.
1517 sub git_get_avatar {
1518         my ($email, %opts) = @_;
1519         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1520         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1521         $opts{-size} ||= 'default';
1522         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1523         my $url = "";
1524         if ($git_avatar eq 'gravatar') {
1525                 $url = "http://www.gravatar.com/avatar/" .
1526                         Digest::MD5::md5_hex(lc $email) . "?s=$size";
1527         }
1528         # Currently only gravatars are supported, but other forms such as
1529         # picons can be added by putting an else up here and defining $url
1530         # as needed. If no variant puts something in $url, we assume avatars
1531         # are completely disabled/unavailable.
1532         if ($url) {
1533                 return $pre_white .
1534                        "<img width=\"$size\" " .
1535                             "class=\"avatar\" " .
1536                             "src=\"$url\" " .
1537                        "/>" . $post_white;
1538         } else {
1539                 return "";
1540         }
1541 }
1542
1543 # format the author name of the given commit with the given tag
1544 # the author name is chopped and escaped according to the other
1545 # optional parameters (see chop_str).
1546 sub format_author_html {
1547         my $tag = shift;
1548         my $co = shift;
1549         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1550         return "<$tag class=\"author\">" .
1551                git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1552                $author . "</$tag>";
1553 }
1554
1555 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1556 sub format_git_diff_header_line {
1557         my $line = shift;
1558         my $diffinfo = shift;
1559         my ($from, $to) = @_;
1560
1561         if ($diffinfo->{'nparents'}) {
1562                 # combined diff
1563                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1564                 if ($to->{'href'}) {
1565                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1566                                          esc_path($to->{'file'}));
1567                 } else { # file was deleted (no href)
1568                         $line .= esc_path($to->{'file'});
1569                 }
1570         } else {
1571                 # "ordinary" diff
1572                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1573                 if ($from->{'href'}) {
1574                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1575                                          'a/' . esc_path($from->{'file'}));
1576                 } else { # file was added (no href)
1577                         $line .= 'a/' . esc_path($from->{'file'});
1578                 }
1579                 $line .= ' ';
1580                 if ($to->{'href'}) {
1581                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1582                                          'b/' . esc_path($to->{'file'}));
1583                 } else { # file was deleted
1584                         $line .= 'b/' . esc_path($to->{'file'});
1585                 }
1586         }
1587
1588         return "<div class=\"diff header\">$line</div>\n";
1589 }
1590
1591 # format extended diff header line, before patch itself
1592 sub format_extended_diff_header_line {
1593         my $line = shift;
1594         my $diffinfo = shift;
1595         my ($from, $to) = @_;
1596
1597         # match <path>
1598         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1599                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1600                                        esc_path($from->{'file'}));
1601         }
1602         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1603                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1604                                  esc_path($to->{'file'}));
1605         }
1606         # match single <mode>
1607         if ($line =~ m/\s(\d{6})$/) {
1608                 $line .= '<span class="info"> (' .
1609                          file_type_long($1) .
1610                          ')</span>';
1611         }
1612         # match <hash>
1613         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1614                 # can match only for combined diff
1615                 $line = 'index ';
1616                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1617                         if ($from->{'href'}[$i]) {
1618                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1619                                                   -class=>"hash"},
1620                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1621                         } else {
1622                                 $line .= '0' x 7;
1623                         }
1624                         # separator
1625                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1626                 }
1627                 $line .= '..';
1628                 if ($to->{'href'}) {
1629                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1630                                          substr($diffinfo->{'to_id'},0,7));
1631                 } else {
1632                         $line .= '0' x 7;
1633                 }
1634
1635         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1636                 # can match only for ordinary diff
1637                 my ($from_link, $to_link);
1638                 if ($from->{'href'}) {
1639                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1640                                              substr($diffinfo->{'from_id'},0,7));
1641                 } else {
1642                         $from_link = '0' x 7;
1643                 }
1644                 if ($to->{'href'}) {
1645                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1646                                            substr($diffinfo->{'to_id'},0,7));
1647                 } else {
1648                         $to_link = '0' x 7;
1649                 }
1650                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1651                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1652         }
1653
1654         return $line . "<br/>\n";
1655 }
1656
1657 # format from-file/to-file diff header
1658 sub format_diff_from_to_header {
1659         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1660         my $line;
1661         my $result = '';
1662
1663         $line = $from_line;
1664         #assert($line =~ m/^---/) if DEBUG;
1665         # no extra formatting for "^--- /dev/null"
1666         if (! $diffinfo->{'nparents'}) {
1667                 # ordinary (single parent) diff
1668                 if ($line =~ m!^--- "?a/!) {
1669                         if ($from->{'href'}) {
1670                                 $line = '--- a/' .
1671                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1672                                                 esc_path($from->{'file'}));
1673                         } else {
1674                                 $line = '--- a/' .
1675                                         esc_path($from->{'file'});
1676                         }
1677                 }
1678                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1679
1680         } else {
1681                 # combined diff (merge commit)
1682                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1683                         if ($from->{'href'}[$i]) {
1684                                 $line = '--- ' .
1685                                         $cgi->a({-href=>href(action=>"blobdiff",
1686                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1687                                                              hash_parent_base=>$parents[$i],
1688                                                              file_parent=>$from->{'file'}[$i],
1689                                                              hash=>$diffinfo->{'to_id'},
1690                                                              hash_base=>$hash,
1691                                                              file_name=>$to->{'file'}),
1692                                                  -class=>"path",
1693                                                  -title=>"diff" . ($i+1)},
1694                                                 $i+1) .
1695                                         '/' .
1696                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1697                                                 esc_path($from->{'file'}[$i]));
1698                         } else {
1699                                 $line = '--- /dev/null';
1700                         }
1701                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1702                 }
1703         }
1704
1705         $line = $to_line;
1706         #assert($line =~ m/^\+\+\+/) if DEBUG;
1707         # no extra formatting for "^+++ /dev/null"
1708         if ($line =~ m!^\+\+\+ "?b/!) {
1709                 if ($to->{'href'}) {
1710                         $line = '+++ b/' .
1711                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1712                                         esc_path($to->{'file'}));
1713                 } else {
1714                         $line = '+++ b/' .
1715                                 esc_path($to->{'file'});
1716                 }
1717         }
1718         $result .= qq!<div class="diff to_file">$line</div>\n!;
1719
1720         return $result;
1721 }
1722
1723 # create note for patch simplified by combined diff
1724 sub format_diff_cc_simplified {
1725         my ($diffinfo, @parents) = @_;
1726         my $result = '';
1727
1728         $result .= "<div class=\"diff header\">" .
1729                    "diff --cc ";
1730         if (!is_deleted($diffinfo)) {
1731                 $result .= $cgi->a({-href => href(action=>"blob",
1732                                                   hash_base=>$hash,
1733                                                   hash=>$diffinfo->{'to_id'},
1734                                                   file_name=>$diffinfo->{'to_file'}),
1735                                     -class => "path"},
1736                                    esc_path($diffinfo->{'to_file'}));
1737         } else {
1738                 $result .= esc_path($diffinfo->{'to_file'});
1739         }
1740         $result .= "</div>\n" . # class="diff header"
1741                    "<div class=\"diff nodifferences\">" .
1742                    "Simple merge" .
1743                    "</div>\n"; # class="diff nodifferences"
1744
1745         return $result;
1746 }
1747
1748 # format patch (diff) line (not to be used for diff headers)
1749 sub format_diff_line {
1750         my $line = shift;
1751         my ($from, $to) = @_;
1752         my $diff_class = "";
1753
1754         chomp $line;
1755
1756         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1757                 # combined diff
1758                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1759                 if ($line =~ m/^\@{3}/) {
1760                         $diff_class = " chunk_header";
1761                 } elsif ($line =~ m/^\\/) {
1762                         $diff_class = " incomplete";
1763                 } elsif ($prefix =~ tr/+/+/) {
1764                         $diff_class = " add";
1765                 } elsif ($prefix =~ tr/-/-/) {
1766                         $diff_class = " rem";
1767                 }
1768         } else {
1769                 # assume ordinary diff
1770                 my $char = substr($line, 0, 1);
1771                 if ($char eq '+') {
1772                         $diff_class = " add";
1773                 } elsif ($char eq '-') {
1774                         $diff_class = " rem";
1775                 } elsif ($char eq '@') {
1776                         $diff_class = " chunk_header";
1777                 } elsif ($char eq "\\") {
1778                         $diff_class = " incomplete";
1779                 }
1780         }
1781         $line = untabify($line);
1782         if ($from && $to && $line =~ m/^\@{2} /) {
1783                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1784                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1785
1786                 $from_lines = 0 unless defined $from_lines;
1787                 $to_lines   = 0 unless defined $to_lines;
1788
1789                 if ($from->{'href'}) {
1790                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1791                                              -class=>"list"}, $from_text);
1792                 }
1793                 if ($to->{'href'}) {
1794                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1795                                              -class=>"list"}, $to_text);
1796                 }
1797                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1798                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1799                 return "<div class=\"diff$diff_class\">$line</div>\n";
1800         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1801                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1802                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1803
1804                 @from_text = split(' ', $ranges);
1805                 for (my $i = 0; $i < @from_text; ++$i) {
1806                         ($from_start[$i], $from_nlines[$i]) =
1807                                 (split(',', substr($from_text[$i], 1)), 0);
1808                 }
1809
1810                 $to_text   = pop @from_text;
1811                 $to_start  = pop @from_start;
1812                 $to_nlines = pop @from_nlines;
1813
1814                 $line = "<span class=\"chunk_info\">$prefix ";
1815                 for (my $i = 0; $i < @from_text; ++$i) {
1816                         if ($from->{'href'}[$i]) {
1817                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1818                                                   -class=>"list"}, $from_text[$i]);
1819                         } else {
1820                                 $line .= $from_text[$i];
1821                         }
1822                         $line .= " ";
1823                 }
1824                 if ($to->{'href'}) {
1825                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1826                                           -class=>"list"}, $to_text);
1827                 } else {
1828                         $line .= $to_text;
1829                 }
1830                 $line .= " $prefix</span>" .
1831                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1832                 return "<div class=\"diff$diff_class\">$line</div>\n";
1833         }
1834         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1835 }
1836
1837 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1838 # linked.  Pass the hash of the tree/commit to snapshot.
1839 sub format_snapshot_links {
1840         my ($hash) = @_;
1841         my $num_fmts = @snapshot_fmts;
1842         if ($num_fmts > 1) {
1843                 # A parenthesized list of links bearing format names.
1844                 # e.g. "snapshot (_tar.gz_ _zip_)"
1845                 return "snapshot (" . join(' ', map
1846                         $cgi->a({
1847                                 -href => href(
1848                                         action=>"snapshot",
1849                                         hash=>$hash,
1850                                         snapshot_format=>$_
1851                                 )
1852                         }, $known_snapshot_formats{$_}{'display'})
1853                 , @snapshot_fmts) . ")";
1854         } elsif ($num_fmts == 1) {
1855                 # A single "snapshot" link whose tooltip bears the format name.
1856                 # i.e. "_snapshot_"
1857                 my ($fmt) = @snapshot_fmts;
1858                 return
1859                         $cgi->a({
1860                                 -href => href(
1861                                         action=>"snapshot",
1862                                         hash=>$hash,
1863                                         snapshot_format=>$fmt
1864                                 ),
1865                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1866                         }, "snapshot");
1867         } else { # $num_fmts == 0
1868                 return undef;
1869         }
1870 }
1871
1872 ## ......................................................................
1873 ## functions returning values to be passed, perhaps after some
1874 ## transformation, to other functions; e.g. returning arguments to href()
1875
1876 # returns hash to be passed to href to generate gitweb URL
1877 # in -title key it returns description of link
1878 sub get_feed_info {
1879         my $format = shift || 'Atom';
1880         my %res = (action => lc($format));
1881
1882         # feed links are possible only for project views
1883         return unless (defined $project);
1884         # some views should link to OPML, or to generic project feed,
1885         # or don't have specific feed yet (so they should use generic)
1886         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1887
1888         my $branch;
1889         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1890         # from tag links; this also makes possible to detect branch links
1891         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1892             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1893                 $branch = $1;
1894         }
1895         # find log type for feed description (title)
1896         my $type = 'log';
1897         if (defined $file_name) {
1898                 $type  = "history of $file_name";
1899                 $type .= "/" if ($action eq 'tree');
1900                 $type .= " on '$branch'" if (defined $branch);
1901         } else {
1902                 $type = "log of $branch" if (defined $branch);
1903         }
1904
1905         $res{-title} = $type;
1906         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1907         $res{'file_name'} = $file_name;
1908
1909         return %res;
1910 }
1911
1912 ## ----------------------------------------------------------------------
1913 ## git utility subroutines, invoking git commands
1914
1915 # returns path to the core git executable and the --git-dir parameter as list
1916 sub git_cmd {
1917         return $GIT, '--git-dir='.$git_dir;
1918 }
1919
1920 # quote the given arguments for passing them to the shell
1921 # quote_command("command", "arg 1", "arg with ' and ! characters")
1922 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1923 # Try to avoid using this function wherever possible.
1924 sub quote_command {
1925         return join(' ',
1926                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
1927 }
1928
1929 # get HEAD ref of given project as hash
1930 sub git_get_head_hash {
1931         my $project = shift;
1932         my $o_git_dir = $git_dir;
1933         my $retval = undef;
1934         $git_dir = "$projectroot/$project";
1935         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1936                 my $head = <$fd>;
1937                 close $fd;
1938                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1939                         $retval = $1;
1940                 }
1941         }
1942         if (defined $o_git_dir) {
1943                 $git_dir = $o_git_dir;
1944         }
1945         return $retval;
1946 }
1947
1948 # get type of given object
1949 sub git_get_type {
1950         my $hash = shift;
1951
1952         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1953         my $type = <$fd>;
1954         close $fd or return;
1955         chomp $type;
1956         return $type;
1957 }
1958
1959 # repository configuration
1960 our $config_file = '';
1961 our %config;
1962
1963 # store multiple values for single key as anonymous array reference
1964 # single values stored directly in the hash, not as [ <value> ]
1965 sub hash_set_multi {
1966         my ($hash, $key, $value) = @_;
1967
1968         if (!exists $hash->{$key}) {
1969                 $hash->{$key} = $value;
1970         } elsif (!ref $hash->{$key}) {
1971                 $hash->{$key} = [ $hash->{$key}, $value ];
1972         } else {
1973                 push @{$hash->{$key}}, $value;
1974         }
1975 }
1976
1977 # return hash of git project configuration
1978 # optionally limited to some section, e.g. 'gitweb'
1979 sub git_parse_project_config {
1980         my $section_regexp = shift;
1981         my %config;
1982
1983         local $/ = "\0";
1984
1985         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1986                 or return;
1987
1988         while (my $keyval = <$fh>) {
1989                 chomp $keyval;
1990                 my ($key, $value) = split(/\n/, $keyval, 2);
1991
1992                 hash_set_multi(\%config, $key, $value)
1993                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1994         }
1995         close $fh;
1996
1997         return %config;
1998 }
1999
2000 # convert config value to boolean: 'true' or 'false'
2001 # no value, number > 0, 'true' and 'yes' values are true
2002 # rest of values are treated as false (never as error)
2003 sub config_to_bool {
2004         my $val = shift;
2005
2006         return 1 if !defined $val;             # section.key
2007
2008         # strip leading and trailing whitespace
2009         $val =~ s/^\s+//;
2010         $val =~ s/\s+$//;
2011
2012         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2013                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2014 }
2015
2016 # convert config value to simple decimal number
2017 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2018 # to be multiplied by 1024, 1048576, or 1073741824
2019 sub config_to_int {
2020         my $val = shift;
2021
2022         # strip leading and trailing whitespace
2023         $val =~ s/^\s+//;
2024         $val =~ s/\s+$//;
2025
2026         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2027                 $unit = lc($unit);
2028                 # unknown unit is treated as 1
2029                 return $num * ($unit eq 'g' ? 1073741824 :
2030                                $unit eq 'm' ?    1048576 :
2031                                $unit eq 'k' ?       1024 : 1);
2032         }
2033         return $val;
2034 }
2035
2036 # convert config value to array reference, if needed
2037 sub config_to_multi {
2038         my $val = shift;
2039
2040         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2041 }
2042
2043 sub git_get_project_config {
2044         my ($key, $type) = @_;
2045
2046         # key sanity check
2047         return unless ($key);
2048         $key =~ s/^gitweb\.//;
2049         return if ($key =~ m/\W/);
2050
2051         # type sanity check
2052         if (defined $type) {
2053                 $type =~ s/^--//;
2054                 $type = undef
2055                         unless ($type eq 'bool' || $type eq 'int');
2056         }
2057
2058         # get config
2059         if (!defined $config_file ||
2060             $config_file ne "$git_dir/config") {
2061                 %config = git_parse_project_config('gitweb');
2062                 $config_file = "$git_dir/config";
2063         }
2064
2065         # check if config variable (key) exists
2066         return unless exists $config{"gitweb.$key"};
2067
2068         # ensure given type
2069         if (!defined $type) {
2070                 return $config{"gitweb.$key"};
2071         } elsif ($type eq 'bool') {
2072                 # backward compatibility: 'git config --bool' returns true/false
2073                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2074         } elsif ($type eq 'int') {
2075                 return config_to_int($config{"gitweb.$key"});
2076         }
2077         return $config{"gitweb.$key"};
2078 }
2079
2080 # get hash of given path at given ref
2081 sub git_get_hash_by_path {
2082         my $base = shift;
2083         my $path = shift || return undef;
2084         my $type = shift;
2085
2086         $path =~ s,/+$,,;
2087
2088         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2089                 or die_error(500, "Open git-ls-tree failed");
2090         my $line = <$fd>;
2091         close $fd or return undef;
2092
2093         if (!defined $line) {
2094                 # there is no tree or hash given by $path at $base
2095                 return undef;
2096         }
2097
2098         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2099         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2100         if (defined $type && $type ne $2) {
2101                 # type doesn't match
2102                 return undef;
2103         }
2104         return $3;
2105 }
2106
2107 # get path of entry with given hash at given tree-ish (ref)
2108 # used to get 'from' filename for combined diff (merge commit) for renames
2109 sub git_get_path_by_hash {
2110         my $base = shift || return;
2111         my $hash = shift || return;
2112
2113         local $/ = "\0";
2114
2115         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2116                 or return undef;
2117         while (my $line = <$fd>) {
2118                 chomp $line;
2119
2120                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2121                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2122                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2123                         close $fd;
2124                         return $1;
2125                 }
2126         }
2127         close $fd;
2128         return undef;
2129 }
2130
2131 ## ......................................................................
2132 ## git utility functions, directly accessing git repository
2133
2134 sub git_get_project_description {
2135         my $path = shift;
2136
2137         $git_dir = "$projectroot/$path";
2138         open my $fd, '<', "$git_dir/description"
2139                 or return git_get_project_config('description');
2140         my $descr = <$fd>;
2141         close $fd;
2142         if (defined $descr) {
2143                 chomp $descr;
2144         }
2145         return $descr;
2146 }
2147
2148 sub git_get_project_ctags {
2149         my $path = shift;
2150         my $ctags = {};
2151
2152         $git_dir = "$projectroot/$path";
2153         opendir my $dh, "$git_dir/ctags"
2154                 or return $ctags;
2155         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2156                 open my $ct, '<', $_ or next;
2157                 my $val = <$ct>;
2158                 chomp $val;
2159                 close $ct;
2160                 my $ctag = $_; $ctag =~ s#.*/##;
2161                 $ctags->{$ctag} = $val;
2162         }
2163         closedir $dh;
2164         $ctags;
2165 }
2166
2167 sub git_populate_project_tagcloud {
2168         my $ctags = shift;
2169
2170         # First, merge different-cased tags; tags vote on casing
2171         my %ctags_lc;
2172         foreach (keys %$ctags) {
2173                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2174                 if (not $ctags_lc{lc $_}->{topcount}
2175                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2176                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2177                         $ctags_lc{lc $_}->{topname} = $_;
2178                 }
2179         }
2180
2181         my $cloud;
2182         if (eval { require HTML::TagCloud; 1; }) {
2183                 $cloud = HTML::TagCloud->new;
2184                 foreach (sort keys %ctags_lc) {
2185                         # Pad the title with spaces so that the cloud looks
2186                         # less crammed.
2187                         my $title = $ctags_lc{$_}->{topname};
2188                         $title =~ s/ /&nbsp;/g;
2189                         $title =~ s/^/&nbsp;/g;
2190                         $title =~ s/$/&nbsp;/g;
2191                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2192                 }
2193         } else {
2194                 $cloud = \%ctags_lc;
2195         }
2196         $cloud;
2197 }
2198
2199 sub git_show_project_tagcloud {
2200         my ($cloud, $count) = @_;
2201         print STDERR ref($cloud)."..\n";
2202         if (ref $cloud eq 'HTML::TagCloud') {
2203                 return $cloud->html_and_css($count);
2204         } else {
2205                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2206                 return '<p align="center">' . join (', ', map {
2207                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2208                 } splice(@tags, 0, $count)) . '</p>';
2209         }
2210 }
2211
2212 sub git_get_project_url_list {
2213         my $path = shift;
2214
2215         $git_dir = "$projectroot/$path";
2216         open my $fd, '<', "$git_dir/cloneurl"
2217                 or return wantarray ?
2218                 @{ config_to_multi(git_get_project_config('url')) } :
2219                    config_to_multi(git_get_project_config('url'));
2220         my @git_project_url_list = map { chomp; $_ } <$fd>;
2221         close $fd;
2222
2223         return wantarray ? @git_project_url_list : \@git_project_url_list;
2224 }
2225
2226 sub git_get_projects_list {
2227         my ($filter) = @_;
2228         my @list;
2229
2230         $filter ||= '';
2231         $filter =~ s/\.git$//;
2232
2233         my $check_forks = gitweb_check_feature('forks');
2234
2235         if (-d $projects_list) {
2236                 # search in directory
2237                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2238                 # remove the trailing "/"
2239                 $dir =~ s!/+$!!;
2240                 my $pfxlen = length("$dir");
2241                 my $pfxdepth = ($dir =~ tr!/!!);
2242
2243                 File::Find::find({
2244                         follow_fast => 1, # follow symbolic links
2245                         follow_skip => 2, # ignore duplicates
2246                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2247                         wanted => sub {
2248                                 # skip project-list toplevel, if we get it.
2249                                 return if (m!^[/.]$!);
2250                                 # only directories can be git repositories
2251                                 return unless (-d $_);
2252                                 # don't traverse too deep (Find is super slow on os x)
2253                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2254                                         $File::Find::prune = 1;
2255                                         return;
2256                                 }
2257
2258                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2259                                 # we check related file in $projectroot
2260                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2261                                 if (check_export_ok("$projectroot/$path")) {
2262                                         push @list, { path => $path };
2263                                         $File::Find::prune = 1;
2264                                 }
2265                         },
2266                 }, "$dir");
2267
2268         } elsif (-f $projects_list) {
2269                 # read from file(url-encoded):
2270                 # 'git%2Fgit.git Linus+Torvalds'
2271                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2272                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2273                 my %paths;
2274                 open my $fd, '<', $projects_list or return;
2275         PROJECT:
2276                 while (my $line = <$fd>) {
2277                         chomp $line;
2278                         my ($path, $owner) = split ' ', $line;
2279                         $path = unescape($path);
2280                         $owner = unescape($owner);
2281                         if (!defined $path) {
2282                                 next;
2283                         }
2284                         if ($filter ne '') {
2285                                 # looking for forks;
2286                                 my $pfx = substr($path, 0, length($filter));
2287                                 if ($pfx ne $filter) {
2288                                         next PROJECT;
2289                                 }
2290                                 my $sfx = substr($path, length($filter));
2291                                 if ($sfx !~ /^\/.*\.git$/) {
2292                                         next PROJECT;
2293                                 }
2294                         } elsif ($check_forks) {
2295                         PATH:
2296                                 foreach my $filter (keys %paths) {
2297                                         # looking for forks;
2298                                         my $pfx = substr($path, 0, length($filter));
2299                                         if ($pfx ne $filter) {
2300                                                 next PATH;
2301                                         }
2302                                         my $sfx = substr($path, length($filter));
2303                                         if ($sfx !~ /^\/.*\.git$/) {
2304                                                 next PATH;
2305                                         }
2306                                         # is a fork, don't include it in
2307                                         # the list
2308                                         next PROJECT;
2309                                 }
2310                         }
2311                         if (check_export_ok("$projectroot/$path")) {
2312                                 my $pr = {
2313                                         path => $path,
2314                                         owner => to_utf8($owner),
2315                                 };
2316                                 push @list, $pr;
2317                                 (my $forks_path = $path) =~ s/\.git$//;
2318                                 $paths{$forks_path}++;
2319                         }
2320                 }
2321                 close $fd;
2322         }
2323         return @list;
2324 }
2325
2326 our $gitweb_project_owner = undef;
2327 sub git_get_project_list_from_file {
2328
2329         return if (defined $gitweb_project_owner);
2330
2331         $gitweb_project_owner = {};
2332         # read from file (url-encoded):
2333         # 'git%2Fgit.git Linus+Torvalds'
2334         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2335         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2336         if (-f $projects_list) {
2337                 open(my $fd, '<', $projects_list);
2338                 while (my $line = <$fd>) {
2339                         chomp $line;
2340                         my ($pr, $ow) = split ' ', $line;
2341                         $pr = unescape($pr);
2342                         $ow = unescape($ow);
2343                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2344                 }
2345                 close $fd;
2346         }
2347 }
2348
2349 sub git_get_project_owner {
2350         my $project = shift;
2351         my $owner;
2352
2353         return undef unless $project;
2354         $git_dir = "$projectroot/$project";
2355
2356         if (!defined $gitweb_project_owner) {
2357                 git_get_project_list_from_file();
2358         }
2359
2360         if (exists $gitweb_project_owner->{$project}) {
2361                 $owner = $gitweb_project_owner->{$project};
2362         }
2363         if (!defined $owner){
2364                 $owner = git_get_project_config('owner');
2365         }
2366         if (!defined $owner) {
2367                 $owner = get_file_owner("$git_dir");
2368         }
2369
2370         return $owner;
2371 }
2372
2373 sub git_get_last_activity {
2374         my ($path) = @_;
2375         my $fd;
2376
2377         $git_dir = "$projectroot/$path";
2378         open($fd, "-|", git_cmd(), 'for-each-ref',
2379              '--format=%(committer)',
2380              '--sort=-committerdate',
2381              '--count=1',
2382              'refs/heads') or return;
2383         my $most_recent = <$fd>;
2384         close $fd or return;
2385         if (defined $most_recent &&
2386             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2387                 my $timestamp = $1;
2388                 my $age = time - $timestamp;
2389                 return ($age, age_string($age));
2390         }
2391         return (undef, undef);
2392 }
2393
2394 sub git_get_references {
2395         my $type = shift || "";
2396         my %refs;
2397         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2398         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2399         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2400                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2401                 or return;
2402
2403         while (my $line = <$fd>) {
2404                 chomp $line;
2405                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2406                         if (defined $refs{$1}) {
2407                                 push @{$refs{$1}}, $2;
2408                         } else {
2409                                 $refs{$1} = [ $2 ];
2410                         }
2411                 }
2412         }
2413         close $fd or return;
2414         return \%refs;
2415 }
2416
2417 sub git_get_rev_name_tags {
2418         my $hash = shift || return undef;
2419
2420         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2421                 or return;
2422         my $name_rev = <$fd>;
2423         close $fd;
2424
2425         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2426                 return $1;
2427         } else {
2428                 # catches also '$hash undefined' output
2429                 return undef;
2430         }
2431 }
2432
2433 ## ----------------------------------------------------------------------
2434 ## parse to hash functions
2435
2436 sub parse_date {
2437         my $epoch = shift;
2438         my $tz = shift || "-0000";
2439
2440         my %date;
2441         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2442         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2443         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2444         $date{'hour'} = $hour;
2445         $date{'minute'} = $min;
2446         $date{'mday'} = $mday;
2447         $date{'day'} = $days[$wday];
2448         $date{'month'} = $months[$mon];
2449         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2450                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2451         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2452                              $mday, $months[$mon], $hour ,$min;
2453         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2454                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2455
2456         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2457         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2458         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2459         $date{'hour_local'} = $hour;
2460         $date{'minute_local'} = $min;
2461         $date{'tz_local'} = $tz;
2462         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2463                                   1900+$year, $mon+1, $mday,
2464                                   $hour, $min, $sec, $tz);
2465         return %date;
2466 }
2467
2468 sub parse_tag {
2469         my $tag_id = shift;
2470         my %tag;
2471         my @comment;
2472
2473         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2474         $tag{'id'} = $tag_id;
2475         while (my $line = <$fd>) {
2476                 chomp $line;
2477                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2478                         $tag{'object'} = $1;
2479                 } elsif ($line =~ m/^type (.+)$/) {
2480                         $tag{'type'} = $1;
2481                 } elsif ($line =~ m/^tag (.+)$/) {
2482                         $tag{'name'} = $1;
2483                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2484                         $tag{'author'} = $1;
2485                         $tag{'author_epoch'} = $2;
2486                         $tag{'author_tz'} = $3;
2487                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2488                                 $tag{'author_name'}  = $1;
2489                                 $tag{'author_email'} = $2;
2490                         } else {
2491                                 $tag{'author_name'} = $tag{'author'};
2492                         }
2493                 } elsif ($line =~ m/--BEGIN/) {
2494                         push @comment, $line;
2495                         last;
2496                 } elsif ($line eq "") {
2497                         last;
2498                 }
2499         }
2500         push @comment, <$fd>;
2501         $tag{'comment'} = \@comment;
2502         close $fd or return;
2503         if (!defined $tag{'name'}) {
2504                 return
2505         };
2506         return %tag
2507 }
2508
2509 sub parse_commit_text {
2510         my ($commit_text, $withparents) = @_;
2511         my @commit_lines = split '\n', $commit_text;
2512         my %co;
2513
2514         pop @commit_lines; # Remove '\0'
2515
2516         if (! @commit_lines) {
2517                 return;
2518         }
2519
2520         my $header = shift @commit_lines;
2521         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2522                 return;
2523         }
2524         ($co{'id'}, my @parents) = split ' ', $header;
2525         while (my $line = shift @commit_lines) {
2526                 last if $line eq "\n";
2527                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2528                         $co{'tree'} = $1;
2529                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2530                         push @parents, $1;
2531                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2532                         $co{'author'} = $1;
2533                         $co{'author_epoch'} = $2;
2534                         $co{'author_tz'} = $3;
2535                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2536                                 $co{'author_name'}  = $1;
2537                                 $co{'author_email'} = $2;
2538                         } else {
2539                                 $co{'author_name'} = $co{'author'};
2540                         }
2541                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2542                         $co{'committer'} = $1;
2543                         $co{'committer_epoch'} = $2;
2544                         $co{'committer_tz'} = $3;
2545                         $co{'committer_name'} = $co{'committer'};
2546                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2547                                 $co{'committer_name'}  = $1;
2548                                 $co{'committer_email'} = $2;
2549                         } else {
2550                                 $co{'committer_name'} = $co{'committer'};
2551                         }
2552                 }
2553         }
2554         if (!defined $co{'tree'}) {
2555                 return;
2556         };
2557         $co{'parents'} = \@parents;
2558         $co{'parent'} = $parents[0];
2559
2560         foreach my $title (@commit_lines) {
2561                 $title =~ s/^    //;
2562                 if ($title ne "") {
2563                         $co{'title'} = chop_str($title, 80, 5);
2564                         # remove leading stuff of merges to make the interesting part visible
2565                         if (length($title) > 50) {
2566                                 $title =~ s/^Automatic //;
2567                                 $title =~ s/^merge (of|with) /Merge ... /i;
2568                                 if (length($title) > 50) {
2569                                         $title =~ s/(http|rsync):\/\///;
2570                                 }
2571                                 if (length($title) > 50) {
2572                                         $title =~ s/(master|www|rsync)\.//;
2573                                 }
2574                                 if (length($title) > 50) {
2575                                         $title =~ s/kernel.org:?//;
2576                                 }
2577                                 if (length($title) > 50) {
2578                                         $title =~ s/\/pub\/scm//;
2579                                 }
2580                         }
2581                         $co{'title_short'} = chop_str($title, 50, 5);
2582                         last;
2583                 }
2584         }
2585         if (! defined $co{'title'} || $co{'title'} eq "") {
2586                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2587         }
2588         # remove added spaces
2589         foreach my $line (@commit_lines) {
2590                 $line =~ s/^    //;
2591         }
2592         $co{'comment'} = \@commit_lines;
2593
2594         my $age = time - $co{'committer_epoch'};
2595         $co{'age'} = $age;
2596         $co{'age_string'} = age_string($age);
2597         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2598         if ($age > 60*60*24*7*2) {
2599                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2600                 $co{'age_string_age'} = $co{'age_string'};
2601         } else {
2602                 $co{'age_string_date'} = $co{'age_string'};
2603                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2604         }
2605         return %co;
2606 }
2607
2608 sub parse_commit {
2609         my ($commit_id) = @_;
2610         my %co;
2611
2612         local $/ = "\0";
2613
2614         open my $fd, "-|", git_cmd(), "rev-list",
2615                 "--parents",
2616                 "--header",
2617                 "--max-count=1",
2618                 $commit_id,
2619                 "--",
2620                 or die_error(500, "Open git-rev-list failed");
2621         %co = parse_commit_text(<$fd>, 1);
2622         close $fd;
2623
2624         return %co;
2625 }
2626
2627 sub parse_commits {
2628         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2629         my @cos;
2630
2631         $maxcount ||= 1;
2632         $skip ||= 0;
2633
2634         local $/ = "\0";
2635
2636         open my $fd, "-|", git_cmd(), "rev-list",
2637                 "--header",
2638                 @args,
2639                 ("--max-count=" . $maxcount),
2640                 ("--skip=" . $skip),
2641                 @extra_options,
2642                 $commit_id,
2643                 "--",
2644                 ($filename ? ($filename) : ())
2645                 or die_error(500, "Open git-rev-list failed");
2646         while (my $line = <$fd>) {
2647                 my %co = parse_commit_text($line);
2648                 push @cos, \%co;
2649         }
2650         close $fd;
2651
2652         return wantarray ? @cos : \@cos;
2653 }
2654
2655 # parse line of git-diff-tree "raw" output
2656 sub parse_difftree_raw_line {
2657         my $line = shift;
2658         my %res;
2659
2660         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2661         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2662         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2663                 $res{'from_mode'} = $1;
2664                 $res{'to_mode'} = $2;
2665                 $res{'from_id'} = $3;
2666                 $res{'to_id'} = $4;
2667                 $res{'status'} = $5;
2668                 $res{'similarity'} = $6;
2669                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2670                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2671                 } else {
2672                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2673                 }
2674         }
2675         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2676         # combined diff (for merge commit)
2677         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2678                 $res{'nparents'}  = length($1);
2679                 $res{'from_mode'} = [ split(' ', $2) ];
2680                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2681                 $res{'from_id'} = [ split(' ', $3) ];
2682                 $res{'to_id'} = pop @{$res{'from_id'}};
2683                 $res{'status'} = [ split('', $4) ];
2684                 $res{'to_file'} = unquote($5);
2685         }
2686         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2687         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2688                 $res{'commit'} = $1;
2689         }
2690
2691         return wantarray ? %res : \%res;
2692 }
2693
2694 # wrapper: return parsed line of git-diff-tree "raw" output
2695 # (the argument might be raw line, or parsed info)
2696 sub parsed_difftree_line {
2697         my $line_or_ref = shift;
2698
2699         if (ref($line_or_ref) eq "HASH") {
2700                 # pre-parsed (or generated by hand)
2701                 return $line_or_ref;
2702         } else {
2703                 return parse_difftree_raw_line($line_or_ref);
2704         }
2705 }
2706
2707 # parse line of git-ls-tree output
2708 sub parse_ls_tree_line {
2709         my $line = shift;
2710         my %opts = @_;
2711         my %res;
2712
2713         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2714         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2715
2716         $res{'mode'} = $1;
2717         $res{'type'} = $2;
2718         $res{'hash'} = $3;
2719         if ($opts{'-z'}) {
2720                 $res{'name'} = $4;
2721         } else {
2722                 $res{'name'} = unquote($4);
2723         }
2724
2725         return wantarray ? %res : \%res;
2726 }
2727
2728 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2729 sub parse_from_to_diffinfo {
2730         my ($diffinfo, $from, $to, @parents) = @_;
2731
2732         if ($diffinfo->{'nparents'}) {
2733                 # combined diff
2734                 $from->{'file'} = [];
2735                 $from->{'href'} = [];
2736                 fill_from_file_info($diffinfo, @parents)
2737                         unless exists $diffinfo->{'from_file'};
2738                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2739                         $from->{'file'}[$i] =
2740                                 defined $diffinfo->{'from_file'}[$i] ?
2741                                         $diffinfo->{'from_file'}[$i] :
2742                                         $diffinfo->{'to_file'};
2743                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2744                                 $from->{'href'}[$i] = href(action=>"blob",
2745                                                            hash_base=>$parents[$i],
2746                                                            hash=>$diffinfo->{'from_id'}[$i],
2747                                                            file_name=>$from->{'file'}[$i]);
2748                         } else {
2749                                 $from->{'href'}[$i] = undef;
2750                         }
2751                 }
2752         } else {
2753                 # ordinary (not combined) diff
2754                 $from->{'file'} = $diffinfo->{'from_file'};
2755                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2756                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2757                                                hash=>$diffinfo->{'from_id'},
2758                                                file_name=>$from->{'file'});
2759                 } else {
2760                         delete $from->{'href'};
2761                 }
2762         }
2763
2764         $to->{'file'} = $diffinfo->{'to_file'};
2765         if (!is_deleted($diffinfo)) { # file exists in result
2766                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2767                                      hash=>$diffinfo->{'to_id'},
2768                                      file_name=>$to->{'file'});
2769         } else {
2770                 delete $to->{'href'};
2771         }
2772 }
2773
2774 ## ......................................................................
2775 ## parse to array of hashes functions
2776
2777 sub git_get_heads_list {
2778         my $limit = shift;
2779         my @headslist;
2780
2781         open my $fd, '-|', git_cmd(), 'for-each-ref',
2782                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2783                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2784                 'refs/heads'
2785                 or return;
2786         while (my $line = <$fd>) {
2787                 my %ref_item;
2788
2789                 chomp $line;
2790                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2791                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2792                 my ($committer, $epoch, $tz) =
2793                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2794                 $ref_item{'fullname'}  = $name;
2795                 $name =~ s!^refs/heads/!!;
2796
2797                 $ref_item{'name'}  = $name;
2798                 $ref_item{'id'}    = $hash;
2799                 $ref_item{'title'} = $title || '(no commit message)';
2800                 $ref_item{'epoch'} = $epoch;
2801                 if ($epoch) {
2802                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2803                 } else {
2804                         $ref_item{'age'} = "unknown";
2805                 }
2806
2807                 push @headslist, \%ref_item;
2808         }
2809         close $fd;
2810
2811         return wantarray ? @headslist : \@headslist;
2812 }
2813
2814 sub git_get_tags_list {
2815         my $limit = shift;
2816         my @tagslist;
2817
2818         open my $fd, '-|', git_cmd(), 'for-each-ref',
2819                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2820                 '--format=%(objectname) %(objecttype) %(refname) '.
2821                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2822                 'refs/tags'
2823                 or return;
2824         while (my $line = <$fd>) {
2825                 my %ref_item;
2826
2827                 chomp $line;
2828                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2829                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2830                 my ($creator, $epoch, $tz) =
2831                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2832                 $ref_item{'fullname'} = $name;
2833                 $name =~ s!^refs/tags/!!;
2834
2835                 $ref_item{'type'} = $type;
2836                 $ref_item{'id'} = $id;
2837                 $ref_item{'name'} = $name;
2838                 if ($type eq "tag") {
2839                         $ref_item{'subject'} = $title;
2840                         $ref_item{'reftype'} = $reftype;
2841                         $ref_item{'refid'}   = $refid;
2842                 } else {
2843                         $ref_item{'reftype'} = $type;
2844                         $ref_item{'refid'}   = $id;
2845                 }
2846
2847                 if ($type eq "tag" || $type eq "commit") {
2848                         $ref_item{'epoch'} = $epoch;
2849                         if ($epoch) {
2850                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2851                         } else {
2852                                 $ref_item{'age'} = "unknown";
2853                         }
2854                 }
2855
2856                 push @tagslist, \%ref_item;
2857         }
2858         close $fd;
2859
2860         return wantarray ? @tagslist : \@tagslist;
2861 }
2862
2863 ## ----------------------------------------------------------------------
2864 ## filesystem-related functions
2865
2866 sub get_file_owner {
2867         my $path = shift;
2868
2869         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2870         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2871         if (!defined $gcos) {
2872                 return undef;
2873         }
2874         my $owner = $gcos;
2875         $owner =~ s/[,;].*$//;
2876         return to_utf8($owner);
2877 }
2878
2879 # assume that file exists
2880 sub insert_file {
2881         my $filename = shift;
2882
2883         open my $fd, '<', $filename;
2884         print map { to_utf8($_) } <$fd>;
2885         close $fd;
2886 }
2887
2888 ## ......................................................................
2889 ## mimetype related functions
2890
2891 sub mimetype_guess_file {
2892         my $filename = shift;
2893         my $mimemap = shift;
2894         -r $mimemap or return undef;
2895
2896         my %mimemap;
2897         open(my $mh, '<', $mimemap) or return undef;
2898         while (<$mh>) {
2899                 next if m/^#/; # skip comments
2900                 my ($mimetype, $exts) = split(/\t+/);
2901                 if (defined $exts) {
2902                         my @exts = split(/\s+/, $exts);
2903                         foreach my $ext (@exts) {
2904                                 $mimemap{$ext} = $mimetype;
2905                         }
2906                 }
2907         }
2908         close($mh);
2909
2910         $filename =~ /\.([^.]*)$/;
2911         return $mimemap{$1};
2912 }
2913
2914 sub mimetype_guess {
2915         my $filename = shift;
2916         my $mime;
2917         $filename =~ /\./ or return undef;
2918
2919         if ($mimetypes_file) {
2920                 my $file = $mimetypes_file;
2921                 if ($file !~ m!^/!) { # if it is relative path
2922                         # it is relative to project
2923                         $file = "$projectroot/$project/$file";
2924                 }
2925                 $mime = mimetype_guess_file($filename, $file);
2926         }
2927         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2928         return $mime;
2929 }
2930
2931 sub blob_mimetype {
2932         my $fd = shift;
2933         my $filename = shift;
2934
2935         if ($filename) {
2936                 my $mime = mimetype_guess($filename);
2937                 $mime and return $mime;
2938         }
2939
2940         # just in case
2941         return $default_blob_plain_mimetype unless $fd;
2942
2943         if (-T $fd) {
2944                 return 'text/plain';
2945         } elsif (! $filename) {
2946                 return 'application/octet-stream';
2947         } elsif ($filename =~ m/\.png$/i) {
2948                 return 'image/png';
2949         } elsif ($filename =~ m/\.gif$/i) {
2950                 return 'image/gif';
2951         } elsif ($filename =~ m/\.jpe?g$/i) {
2952                 return 'image/jpeg';
2953         } else {
2954                 return 'application/octet-stream';
2955         }
2956 }
2957
2958 sub blob_contenttype {
2959         my ($fd, $file_name, $type) = @_;
2960
2961         $type ||= blob_mimetype($fd, $file_name);
2962         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
2963                 $type .= "; charset=$default_text_plain_charset";
2964         }
2965
2966         return $type;
2967 }
2968
2969 ## ======================================================================
2970 ## functions printing HTML: header, footer, error page
2971
2972 sub git_header_html {
2973         my $status = shift || "200 OK";
2974         my $expires = shift;
2975
2976         my $title = "$site_name";
2977         if (defined $project) {
2978                 $title .= " - " . to_utf8($project);
2979                 if (defined $action) {
2980                         $title .= "/$action";
2981                         if (defined $file_name) {
2982                                 $title .= " - " . esc_path($file_name);
2983                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2984                                         $title .= "/";
2985                                 }
2986                         }
2987                 }
2988         }
2989         my $content_type;
2990         # require explicit support from the UA if we are to send the page as
2991         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2992         # we have to do this because MSIE sometimes globs '*/*', pretending to
2993         # support xhtml+xml but choking when it gets what it asked for.
2994         if (defined $cgi->http('HTTP_ACCEPT') &&
2995             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2996             $cgi->Accept('application/xhtml+xml') != 0) {
2997                 $content_type = 'application/xhtml+xml';
2998         } else {
2999                 $content_type = 'text/html';
3000         }
3001         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3002                            -status=> $status, -expires => $expires);
3003         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3004         print <<EOF;
3005 <?xml version="1.0" encoding="utf-8"?>
3006 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3007 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3008 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3009 <!-- git core binaries version $git_version -->
3010 <head>
3011 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3012 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3013 <meta name="robots" content="index, nofollow"/>
3014 <title>$title</title>
3015 EOF
3016         # the stylesheet, favicon etc urls won't work correctly with path_info
3017         # unless we set the appropriate base URL
3018         if ($ENV{'PATH_INFO'}) {
3019                 print "<base href=\"".esc_url($base_url)."\" />\n";
3020         }
3021         # print out each stylesheet that exist, providing backwards capability
3022         # for those people who defined $stylesheet in a config file
3023         if (defined $stylesheet) {
3024                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3025         } else {
3026                 foreach my $stylesheet (@stylesheets) {
3027                         next unless $stylesheet;
3028                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3029                 }
3030         }
3031         if (defined $project) {
3032                 my %href_params = get_feed_info();
3033                 if (!exists $href_params{'-title'}) {
3034                         $href_params{'-title'} = 'log';
3035                 }
3036
3037                 foreach my $format qw(RSS Atom) {
3038                         my $type = lc($format);
3039                         my %link_attr = (
3040                                 '-rel' => 'alternate',
3041                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3042                                 '-type' => "application/$type+xml"
3043                         );
3044
3045                         $href_params{'action'} = $type;
3046                         $link_attr{'-href'} = href(%href_params);
3047                         print "<link ".
3048                               "rel=\"$link_attr{'-rel'}\" ".
3049                               "title=\"$link_attr{'-title'}\" ".
3050                               "href=\"$link_attr{'-href'}\" ".
3051                               "type=\"$link_attr{'-type'}\" ".
3052                               "/>\n";
3053
3054                         $href_params{'extra_options'} = '--no-merges';
3055                         $link_attr{'-href'} = href(%href_params);
3056                         $link_attr{'-title'} .= ' (no merges)';
3057                         print "<link ".
3058                               "rel=\"$link_attr{'-rel'}\" ".
3059                               "title=\"$link_attr{'-title'}\" ".
3060                               "href=\"$link_attr{'-href'}\" ".
3061                               "type=\"$link_attr{'-type'}\" ".
3062                               "/>\n";
3063                 }
3064
3065         } else {
3066                 printf('<link rel="alternate" title="%s projects list" '.
3067                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3068                        $site_name, href(project=>undef, action=>"project_index"));
3069                 printf('<link rel="alternate" title="%s projects feeds" '.
3070                        'href="%s" type="text/x-opml" />'."\n",
3071                        $site_name, href(project=>undef, action=>"opml"));
3072         }
3073         if (defined $favicon) {
3074                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3075         }
3076
3077         print "</head>\n" .
3078               "<body>\n";
3079
3080         if (-f $site_header) {
3081                 insert_file($site_header);
3082         }
3083
3084         print "<div class=\"page_header\">\n" .
3085               $cgi->a({-href => esc_url($logo_url),
3086                        -title => $logo_label},
3087                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3088         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3089         if (defined $project) {
3090                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3091                 if (defined $action) {
3092                         print " / $action";
3093                 }
3094                 print "\n";
3095         }
3096         print "</div>\n";
3097
3098         my $have_search = gitweb_check_feature('search');
3099         if (defined $project && $have_search) {
3100                 if (!defined $searchtext) {
3101                         $searchtext = "";
3102                 }
3103                 my $search_hash;
3104                 if (defined $hash_base) {
3105                         $search_hash = $hash_base;
3106                 } elsif (defined $hash) {
3107                         $search_hash = $hash;
3108                 } else {
3109                         $search_hash = "HEAD";
3110                 }
3111                 my $action = $my_uri;
3112                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3113                 if ($use_pathinfo) {
3114                         $action .= "/".esc_url($project);
3115                 }
3116                 print $cgi->startform(-method => "get", -action => $action) .
3117                       "<div class=\"search\">\n" .
3118                       (!$use_pathinfo &&
3119                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3120                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3121                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3122                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3123                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3124                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3125                       " search:\n",
3126                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3127                       "<span title=\"Extended regular expression\">" .
3128                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3129                                      -checked => $search_use_regexp) .
3130                       "</span>" .
3131                       "</div>" .
3132                       $cgi->end_form() . "\n";
3133         }
3134 }
3135
3136 sub git_footer_html {
3137         my $feed_class = 'rss_logo';
3138
3139         print "<div class=\"page_footer\">\n";
3140         if (defined $project) {
3141                 my $descr = git_get_project_description($project);
3142                 if (defined $descr) {
3143                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3144                 }
3145
3146                 my %href_params = get_feed_info();
3147                 if (!%href_params) {
3148                         $feed_class .= ' generic';
3149                 }
3150                 $href_params{'-title'} ||= 'log';
3151
3152                 foreach my $format qw(RSS Atom) {
3153                         $href_params{'action'} = lc($format);
3154                         print $cgi->a({-href => href(%href_params),
3155                                       -title => "$href_params{'-title'} $format feed",
3156                                       -class => $feed_class}, $format)."\n";
3157                 }
3158
3159         } else {
3160                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3161                               -class => $feed_class}, "OPML") . " ";
3162                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3163                               -class => $feed_class}, "TXT") . "\n";
3164         }
3165         print "</div>\n"; # class="page_footer"
3166
3167         if (-f $site_footer) {
3168                 insert_file($site_footer);
3169         }
3170
3171         print "</body>\n" .
3172               "</html>";
3173 }
3174
3175 # die_error(<http_status_code>, <error_message>)
3176 # Example: die_error(404, 'Hash not found')
3177 # By convention, use the following status codes (as defined in RFC 2616):
3178 # 400: Invalid or missing CGI parameters, or
3179 #      requested object exists but has wrong type.
3180 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3181 #      this server or project.
3182 # 404: Requested object/revision/project doesn't exist.
3183 # 500: The server isn't configured properly, or
3184 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3185 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3186 sub die_error {
3187         my $status = shift || 500;
3188         my $error = shift || "Internal server error";
3189
3190         my %http_responses = (400 => '400 Bad Request',
3191                               403 => '403 Forbidden',
3192                               404 => '404 Not Found',
3193                               500 => '500 Internal Server Error');
3194         git_header_html($http_responses{$status});
3195         print <<EOF;
3196 <div class="page_body">
3197 <br /><br />
3198 $status - $error
3199 <br />
3200 </div>
3201 EOF
3202         git_footer_html();
3203         exit;
3204 }
3205
3206 ## ----------------------------------------------------------------------
3207 ## functions printing or outputting HTML: navigation
3208
3209 sub git_print_page_nav {
3210         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3211         $extra = '' if !defined $extra; # pager or formats
3212
3213         my @navs = qw(summary shortlog log commit commitdiff tree);
3214         if ($suppress) {
3215                 @navs = grep { $_ ne $suppress } @navs;
3216         }
3217
3218         my %arg = map { $_ => {action=>$_} } @navs;
3219         if (defined $head) {
3220                 for (qw(commit commitdiff)) {
3221                         $arg{$_}{'hash'} = $head;
3222                 }
3223                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3224                         for (qw(shortlog log)) {
3225                                 $arg{$_}{'hash'} = $head;
3226                         }
3227                 }
3228         }
3229
3230         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3231         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3232
3233         my @actions = gitweb_get_feature('actions');
3234         my %repl = (
3235                 '%' => '%',
3236                 'n' => $project,         # project name
3237                 'f' => $git_dir,         # project path within filesystem
3238                 'h' => $treehead || '',  # current hash ('h' parameter)
3239                 'b' => $treebase || '',  # hash base ('hb' parameter)
3240         );
3241         while (@actions) {
3242                 my ($label, $link, $pos) = splice(@actions,0,3);
3243                 # insert
3244                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3245                 # munch munch
3246                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3247                 $arg{$label}{'_href'} = $link;
3248         }
3249
3250         print "<div class=\"page_nav\">\n" .
3251                 (join " | ",
3252                  map { $_ eq $current ?
3253                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3254                  } @navs);
3255         print "<br/>\n$extra<br/>\n" .
3256               "</div>\n";
3257 }
3258
3259 sub format_paging_nav {
3260         my ($action, $hash, $head, $page, $has_next_link) = @_;
3261         my $paging_nav;
3262
3263
3264         if ($hash ne $head || $page) {
3265                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3266         } else {
3267                 $paging_nav .= "HEAD";
3268         }
3269
3270         if ($page > 0) {
3271                 $paging_nav .= " &sdot; " .
3272                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3273                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3274         } else {
3275                 $paging_nav .= " &sdot; prev";
3276         }
3277
3278         if ($has_next_link) {
3279                 $paging_nav .= " &sdot; " .
3280                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3281                                  -accesskey => "n", -title => "Alt-n"}, "next");
3282         } else {
3283                 $paging_nav .= " &sdot; next";
3284         }
3285
3286         return $paging_nav;
3287 }
3288
3289 ## ......................................................................
3290 ## functions printing or outputting HTML: div
3291
3292 sub git_print_header_div {
3293         my ($action, $title, $hash, $hash_base) = @_;
3294         my %args = ();
3295
3296         $args{'action'} = $action;
3297         $args{'hash'} = $hash if $hash;
3298         $args{'hash_base'} = $hash_base if $hash_base;
3299
3300         print "<div class=\"header\">\n" .
3301               $cgi->a({-href => href(%args), -class => "title"},
3302               $title ? $title : $action) .
3303               "\n</div>\n";
3304 }
3305
3306 sub print_local_time {
3307         my %date = @_;
3308         if ($date{'hour_local'} < 6) {
3309                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3310                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3311         } else {
3312                 printf(" (%02d:%02d %s)",
3313                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3314         }
3315 }
3316
3317 # Outputs the author name and date in long form
3318 sub git_print_authorship {
3319         my $co = shift;
3320         my %opts = @_;
3321         my $tag = $opts{-tag} || 'div';
3322
3323         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3324         print "<$tag class=\"author_date\">" .
3325               esc_html($co->{'author_name'}) .
3326               " [$ad{'rfc2822'}";
3327         print_local_time(%ad) if ($opts{-localtime});
3328         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3329                   . "</$tag>\n";
3330 }
3331
3332 # Outputs table rows containing the full author or committer information,
3333 # in the format expected for 'commit' view (& similia).
3334 # Parameters are a commit hash reference, followed by the list of people
3335 # to output information for. If the list is empty it defalts to both
3336 # author and committer.
3337 sub git_print_authorship_rows {
3338         my $co = shift;
3339         # too bad we can't use @people = @_ || ('author', 'committer')
3340         my @people = @_;
3341         @people = ('author', 'committer') unless @people;
3342         foreach my $who (@people) {
3343                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3344                 print "<tr><td>$who</td><td>" . esc_html($co->{$who}) . "</td>" .
3345                       "<td rowspan=\"2\">" .
3346                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3347                       "</td></tr>\n" .
3348                       "<tr>" .
3349                       "<td></td><td> $wd{'rfc2822'}";
3350                 print_local_time(%wd);
3351                 print "</td>" .
3352                       "</tr>\n";
3353         }
3354 }
3355
3356 sub git_print_page_path {
3357         my $name = shift;
3358         my $type = shift;
3359         my $hb = shift;
3360
3361
3362         print "<div class=\"page_path\">";
3363         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3364                       -title => 'tree root'}, to_utf8("[$project]"));
3365         print " / ";
3366         if (defined $name) {
3367                 my @dirname = split '/', $name;
3368                 my $basename = pop @dirname;
3369                 my $fullname = '';
3370
3371                 foreach my $dir (@dirname) {
3372                         $fullname .= ($fullname ? '/' : '') . $dir;
3373                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3374                                                      hash_base=>$hb),
3375                                       -title => $fullname}, esc_path($dir));
3376                         print " / ";
3377                 }
3378                 if (defined $type && $type eq 'blob') {
3379                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3380                                                      hash_base=>$hb),
3381                                       -title => $name}, esc_path($basename));
3382                 } elsif (defined $type && $type eq 'tree') {
3383                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3384                                                      hash_base=>$hb),
3385                                       -title => $name}, esc_path($basename));
3386                         print " / ";
3387                 } else {
3388                         print esc_path($basename);
3389                 }
3390         }
3391         print "<br/></div>\n";
3392 }
3393
3394 sub git_print_log {
3395         my $log = shift;
3396         my %opts = @_;
3397
3398         if ($opts{'-remove_title'}) {
3399                 # remove title, i.e. first line of log
3400                 shift @$log;
3401         }
3402         # remove leading empty lines
3403         while (defined $log->[0] && $log->[0] eq "") {
3404                 shift @$log;
3405         }
3406
3407         # print log
3408         my $signoff = 0;
3409         my $empty = 0;
3410         foreach my $line (@$log) {
3411                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3412                         $signoff = 1;
3413                         $empty = 0;
3414                         if (! $opts{'-remove_signoff'}) {
3415                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3416                                 next;
3417                         } else {
3418                                 # remove signoff lines
3419                                 next;
3420                         }
3421                 } else {
3422                         $signoff = 0;
3423                 }
3424
3425                 # print only one empty line
3426                 # do not print empty line after signoff
3427                 if ($line eq "") {
3428                         next if ($empty || $signoff);
3429                         $empty = 1;
3430                 } else {
3431                         $empty = 0;
3432                 }
3433
3434                 print format_log_line_html($line) . "<br/>\n";
3435         }
3436
3437         if ($opts{'-final_empty_line'}) {
3438                 # end with single empty line
3439                 print "<br/>\n" unless $empty;
3440         }
3441 }
3442
3443 # return link target (what link points to)
3444 sub git_get_link_target {
3445         my $hash = shift;
3446         my $link_target;
3447
3448         # read link
3449         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3450                 or return;
3451         {
3452                 local $/ = undef;
3453                 $link_target = <$fd>;
3454         }
3455         close $fd
3456                 or return;
3457
3458         return $link_target;
3459 }
3460
3461 # given link target, and the directory (basedir) the link is in,
3462 # return target of link relative to top directory (top tree);
3463 # return undef if it is not possible (including absolute links).
3464 sub normalize_link_target {
3465         my ($link_target, $basedir) = @_;
3466
3467         # absolute symlinks (beginning with '/') cannot be normalized
3468         return if (substr($link_target, 0, 1) eq '/');
3469
3470         # normalize link target to path from top (root) tree (dir)
3471         my $path;
3472         if ($basedir) {
3473                 $path = $basedir . '/' . $link_target;
3474         } else {
3475                 # we are in top (root) tree (dir)
3476                 $path = $link_target;
3477         }
3478
3479         # remove //, /./, and /../
3480         my @path_parts;
3481         foreach my $part (split('/', $path)) {
3482                 # discard '.' and ''
3483                 next if (!$part || $part eq '.');
3484                 # handle '..'
3485                 if ($part eq '..') {
3486                         if (@path_parts) {
3487                                 pop @path_parts;
3488                         } else {
3489                                 # link leads outside repository (outside top dir)
3490                                 return;
3491                         }
3492                 } else {
3493                         push @path_parts, $part;
3494                 }
3495         }
3496         $path = join('/', @path_parts);
3497
3498         return $path;
3499 }
3500
3501 # print tree entry (row of git_tree), but without encompassing <tr> element
3502 sub git_print_tree_entry {
3503         my ($t, $basedir, $hash_base, $have_blame) = @_;
3504
3505         my %base_key = ();
3506         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3507
3508         # The format of a table row is: mode list link.  Where mode is
3509         # the mode of the entry, list is the name of the entry, an href,
3510         # and link is the action links of the entry.
3511
3512         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3513         if ($t->{'type'} eq "blob") {
3514                 print "<td class=\"list\">" .
3515                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3516                                                file_name=>"$basedir$t->{'name'}", %base_key),
3517                                 -class => "list"}, esc_path($t->{'name'}));
3518                 if (S_ISLNK(oct $t->{'mode'})) {
3519                         my $link_target = git_get_link_target($t->{'hash'});
3520                         if ($link_target) {
3521                                 my $norm_target = normalize_link_target($link_target, $basedir);
3522                                 if (defined $norm_target) {
3523                                         print " -> " .
3524                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3525                                                                      file_name=>$norm_target),
3526                                                        -title => $norm_target}, esc_path($link_target));
3527                                 } else {
3528                                         print " -> " . esc_path($link_target);
3529                                 }
3530                         }
3531                 }
3532                 print "</td>\n";
3533                 print "<td class=\"link\">";
3534                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3535                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3536                               "blob");
3537                 if ($have_blame) {
3538                         print " | " .
3539                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3540                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3541                                       "blame");
3542                 }
3543                 if (defined $hash_base) {
3544                         print " | " .
3545                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3546                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3547                                       "history");
3548                 }
3549                 print " | " .
3550                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3551                                                file_name=>"$basedir$t->{'name'}")},
3552                                 "raw");
3553                 print "</td>\n";
3554
3555         } elsif ($t->{'type'} eq "tree") {
3556                 print "<td class=\"list\">";
3557                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3558                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3559                               esc_path($t->{'name'}));
3560                 print "</td>\n";
3561                 print "<td class=\"link\">";
3562                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3563                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3564                               "tree");
3565                 if (defined $hash_base) {
3566                         print " | " .
3567                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3568                                                      file_name=>"$basedir$t->{'name'}")},
3569                                       "history");
3570                 }
3571                 print "</td>\n";
3572         } else {
3573                 # unknown object: we can only present history for it
3574                 # (this includes 'commit' object, i.e. submodule support)
3575                 print "<td class=\"list\">" .
3576                       esc_path($t->{'name'}) .
3577                       "</td>\n";
3578                 print "<td class=\"link\">";
3579                 if (defined $hash_base) {
3580                         print $cgi->a({-href => href(action=>"history",
3581                                                      hash_base=>$hash_base,
3582                                                      file_name=>"$basedir$t->{'name'}")},
3583                                       "history");
3584                 }
3585                 print "</td>\n";
3586         }
3587 }
3588
3589 ## ......................................................................
3590 ## functions printing large fragments of HTML
3591
3592 # get pre-image filenames for merge (combined) diff
3593 sub fill_from_file_info {
3594         my ($diff, @parents) = @_;
3595
3596         $diff->{'from_file'} = [ ];
3597         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3598         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3599                 if ($diff->{'status'}[$i] eq 'R' ||
3600                     $diff->{'status'}[$i] eq 'C') {
3601                         $diff->{'from_file'}[$i] =
3602                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3603                 }
3604         }
3605
3606         return $diff;
3607 }
3608
3609 # is current raw difftree line of file deletion
3610 sub is_deleted {
3611         my $diffinfo = shift;
3612
3613         return $diffinfo->{'to_id'} eq ('0' x 40);
3614 }
3615
3616 # does patch correspond to [previous] difftree raw line
3617 # $diffinfo  - hashref of parsed raw diff format
3618 # $patchinfo - hashref of parsed patch diff format
3619 #              (the same keys as in $diffinfo)
3620 sub is_patch_split {
3621         my ($diffinfo, $patchinfo) = @_;
3622
3623         return defined $diffinfo && defined $patchinfo
3624                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3625 }
3626
3627
3628 sub git_difftree_body {
3629         my ($difftree, $hash, @parents) = @_;
3630         my ($parent) = $parents[0];
3631         my $have_blame = gitweb_check_feature('blame');
3632         print "<div class=\"list_head\">\n";
3633         if ($#{$difftree} > 10) {
3634                 print(($#{$difftree} + 1) . " files changed:\n");
3635         }
3636         print "</div>\n";
3637
3638         print "<table class=\"" .
3639               (@parents > 1 ? "combined " : "") .
3640               "diff_tree\">\n";
3641
3642         # header only for combined diff in 'commitdiff' view
3643         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3644         if ($has_header) {
3645                 # table header
3646                 print "<thead><tr>\n" .
3647                        "<th></th><th></th>\n"; # filename, patchN link
3648                 for (my $i = 0; $i < @parents; $i++) {
3649                         my $par = $parents[$i];
3650                         print "<th>" .
3651                               $cgi->a({-href => href(action=>"commitdiff",
3652                                                      hash=>$hash, hash_parent=>$par),
3653                                        -title => 'commitdiff to parent number ' .
3654                                                   ($i+1) . ': ' . substr($par,0,7)},
3655                                       $i+1) .
3656                               "&nbsp;</th>\n";
3657                 }
3658                 print "</tr></thead>\n<tbody>\n";
3659         }
3660
3661         my $alternate = 1;
3662         my $patchno = 0;
3663         foreach my $line (@{$difftree}) {
3664                 my $diff = parsed_difftree_line($line);
3665
3666                 if ($alternate) {
3667                         print "<tr class=\"dark\">\n";
3668                 } else {
3669                         print "<tr class=\"light\">\n";
3670                 }
3671                 $alternate ^= 1;
3672
3673                 if (exists $diff->{'nparents'}) { # combined diff
3674
3675                         fill_from_file_info($diff, @parents)
3676                                 unless exists $diff->{'from_file'};
3677
3678                         if (!is_deleted($diff)) {
3679                                 # file exists in the result (child) commit
3680                                 print "<td>" .
3681                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3682                                                              file_name=>$diff->{'to_file'},
3683                                                              hash_base=>$hash),
3684                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3685                                       "</td>\n";
3686                         } else {
3687                                 print "<td>" .
3688                                       esc_path($diff->{'to_file'}) .
3689                                       "</td>\n";
3690                         }
3691
3692                         if ($action eq 'commitdiff') {
3693                                 # link to patch
3694                                 $patchno++;
3695                                 print "<td class=\"link\">" .
3696                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3697                                       " | " .
3698                                       "</td>\n";
3699                         }
3700
3701                         my $has_history = 0;
3702                         my $not_deleted = 0;
3703                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3704                                 my $hash_parent = $parents[$i];
3705                                 my $from_hash = $diff->{'from_id'}[$i];
3706                                 my $from_path = $diff->{'from_file'}[$i];
3707                                 my $status = $diff->{'status'}[$i];
3708
3709                                 $has_history ||= ($status ne 'A');
3710                                 $not_deleted ||= ($status ne 'D');
3711
3712                                 if ($status eq 'A') {
3713                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3714                                 } elsif ($status eq 'D') {
3715                                         print "<td class=\"link\">" .
3716                                               $cgi->a({-href => href(action=>"blob",
3717                                                                      hash_base=>$hash,
3718                                                                      hash=>$from_hash,
3719                                                                      file_name=>$from_path)},
3720                                                       "blob" . ($i+1)) .
3721                                               " | </td>\n";
3722                                 } else {
3723                                         if ($diff->{'to_id'} eq $from_hash) {
3724                                                 print "<td class=\"link nochange\">";
3725                                         } else {
3726                                                 print "<td class=\"link\">";
3727                                         }
3728                                         print $cgi->a({-href => href(action=>"blobdiff",
3729                                                                      hash=>$diff->{'to_id'},
3730                                                                      hash_parent=>$from_hash,
3731                                                                      hash_base=>$hash,
3732                                                                      hash_parent_base=>$hash_parent,
3733                                                                      file_name=>$diff->{'to_file'},
3734                                                                      file_parent=>$from_path)},
3735                                                       "diff" . ($i+1)) .
3736                                               " | </td>\n";
3737                                 }
3738                         }
3739
3740                         print "<td class=\"link\">";
3741                         if ($not_deleted) {
3742                                 print $cgi->a({-href => href(action=>"blob",
3743                                                              hash=>$diff->{'to_id'},
3744                                                              file_name=>$diff->{'to_file'},
3745                                                              hash_base=>$hash)},
3746                                               "blob");
3747                                 print " | " if ($has_history);
3748                         }
3749                         if ($has_history) {
3750                                 print $cgi->a({-href => href(action=>"history",
3751                                                              file_name=>$diff->{'to_file'},
3752                                                              hash_base=>$hash)},
3753                                               "history");
3754                         }
3755                         print "</td>\n";
3756
3757                         print "</tr>\n";
3758                         next; # instead of 'else' clause, to avoid extra indent
3759                 }
3760                 # else ordinary diff
3761
3762                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3763                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3764                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3765                         $to_mode_oct = oct $diff->{'to_mode'};
3766                         if (S_ISREG($to_mode_oct)) { # only for regular file
3767                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3768                         }
3769                         $to_file_type = file_type($diff->{'to_mode'});
3770                 }
3771                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3772                         $from_mode_oct = oct $diff->{'from_mode'};
3773                         if (S_ISREG($to_mode_oct)) { # only for regular file
3774                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3775                         }
3776                         $from_file_type = file_type($diff->{'from_mode'});
3777                 }
3778
3779                 if ($diff->{'status'} eq "A") { # created
3780                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3781                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3782                         $mode_chng   .= "]</span>";
3783                         print "<td>";
3784                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3785                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3786                                       -class => "list"}, esc_path($diff->{'file'}));
3787                         print "</td>\n";
3788                         print "<td>$mode_chng</td>\n";
3789                         print "<td class=\"link\">";
3790                         if ($action eq 'commitdiff') {
3791                                 # link to patch
3792                                 $patchno++;
3793                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3794                                 print " | ";
3795                         }
3796                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3797                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3798                                       "blob");
3799                         print "</td>\n";
3800
3801                 } elsif ($diff->{'status'} eq "D") { # deleted
3802                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3803                         print "<td>";
3804                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3805                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3806                                        -class => "list"}, esc_path($diff->{'file'}));
3807                         print "</td>\n";
3808                         print "<td>$mode_chng</td>\n";
3809                         print "<td class=\"link\">";
3810                         if ($action eq 'commitdiff') {
3811                                 # link to patch
3812                                 $patchno++;
3813                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3814                                 print " | ";
3815                         }
3816                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3817                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3818                                       "blob") . " | ";
3819                         if ($have_blame) {
3820                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3821                                                              file_name=>$diff->{'file'})},
3822                                               "blame") . " | ";
3823                         }
3824                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3825                                                      file_name=>$diff->{'file'})},
3826                                       "history");
3827                         print "</td>\n";
3828
3829                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3830                         my $mode_chnge = "";
3831                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3832                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3833                                 if ($from_file_type ne $to_file_type) {
3834                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3835                                 }
3836                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3837                                         if ($from_mode_str && $to_mode_str) {
3838                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3839                                         } elsif ($to_mode_str) {
3840                                                 $mode_chnge .= " mode: $to_mode_str";
3841                                         }
3842                                 }
3843                                 $mode_chnge .= "]</span>\n";
3844                         }
3845                         print "<td>";
3846                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3847                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3848                                       -class => "list"}, esc_path($diff->{'file'}));
3849                         print "</td>\n";
3850                         print "<td>$mode_chnge</td>\n";
3851                         print "<td class=\"link\">";
3852                         if ($action eq 'commitdiff') {
3853                                 # link to patch
3854                                 $patchno++;
3855                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3856                                       " | ";
3857                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3858                                 # "commit" view and modified file (not onlu mode changed)
3859                                 print $cgi->a({-href => href(action=>"blobdiff",
3860                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3861                                                              hash_base=>$hash, hash_parent_base=>$parent,
3862                                                              file_name=>$diff->{'file'})},
3863                                               "diff") .
3864                                       " | ";
3865                         }
3866                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3867                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3868                                        "blob") . " | ";
3869                         if ($have_blame) {
3870                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3871                                                              file_name=>$diff->{'file'})},
3872                                               "blame") . " | ";
3873                         }
3874                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3875                                                      file_name=>$diff->{'file'})},
3876                                       "history");
3877                         print "</td>\n";
3878
3879                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3880                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3881                         my $nstatus = $status_name{$diff->{'status'}};
3882                         my $mode_chng = "";
3883                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3884                                 # mode also for directories, so we cannot use $to_mode_str
3885                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3886                         }
3887                         print "<td>" .
3888                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3889                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3890                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3891                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3892                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3893                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3894                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3895                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3896                               "<td class=\"link\">";
3897                         if ($action eq 'commitdiff') {
3898                                 # link to patch
3899                                 $patchno++;
3900                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3901                                       " | ";
3902                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3903                                 # "commit" view and modified file (not only pure rename or copy)
3904                                 print $cgi->a({-href => href(action=>"blobdiff",
3905                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3906                                                              hash_base=>$hash, hash_parent_base=>$parent,
3907                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3908                                               "diff") .
3909                                       " | ";
3910                         }
3911                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3912                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3913                                       "blob") . " | ";
3914                         if ($have_blame) {
3915                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3916                                                              file_name=>$diff->{'to_file'})},
3917                                               "blame") . " | ";
3918                         }
3919                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3920                                                     file_name=>$diff->{'to_file'})},
3921                                       "history");
3922                         print "</td>\n";
3923
3924                 } # we should not encounter Unmerged (U) or Unknown (X) status
3925                 print "</tr>\n";
3926         }
3927         print "</tbody>" if $has_header;
3928         print "</table>\n";
3929 }
3930
3931 sub git_patchset_body {
3932         my ($fd, $difftree, $hash, @hash_parents) = @_;
3933         my ($hash_parent) = $hash_parents[0];
3934
3935         my $is_combined = (@hash_parents > 1);
3936         my $patch_idx = 0;
3937         my $patch_number = 0;
3938         my $patch_line;
3939         my $diffinfo;
3940         my $to_name;
3941         my (%from, %to);
3942
3943         print "<div class=\"patchset\">\n";
3944
3945         # skip to first patch
3946         while ($patch_line = <$fd>) {
3947                 chomp $patch_line;
3948
3949                 last if ($patch_line =~ m/^diff /);
3950         }
3951
3952  PATCH:
3953         while ($patch_line) {
3954
3955                 # parse "git diff" header line
3956                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3957                         # $1 is from_name, which we do not use
3958                         $to_name = unquote($2);
3959                         $to_name =~ s!^b/!!;
3960                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3961                         # $1 is 'cc' or 'combined', which we do not use
3962                         $to_name = unquote($2);
3963                 } else {
3964                         $to_name = undef;
3965                 }
3966
3967                 # check if current patch belong to current raw line
3968                 # and parse raw git-diff line if needed
3969                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3970                         # this is continuation of a split patch
3971                         print "<div class=\"patch cont\">\n";
3972                 } else {
3973                         # advance raw git-diff output if needed
3974                         $patch_idx++ if defined $diffinfo;
3975
3976                         # read and prepare patch information
3977                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3978
3979                         # compact combined diff output can have some patches skipped
3980                         # find which patch (using pathname of result) we are at now;
3981                         if ($is_combined) {
3982                                 while ($to_name ne $diffinfo->{'to_file'}) {
3983                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3984                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3985                                               "</div>\n";  # class="patch"
3986
3987                                         $patch_idx++;
3988                                         $patch_number++;
3989
3990                                         last if $patch_idx > $#$difftree;
3991                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3992                                 }
3993                         }
3994
3995                         # modifies %from, %to hashes
3996                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3997
3998                         # this is first patch for raw difftree line with $patch_idx index
3999                         # we index @$difftree array from 0, but number patches from 1
4000                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4001                 }
4002
4003                 # git diff header
4004                 #assert($patch_line =~ m/^diff /) if DEBUG;
4005                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4006                 $patch_number++;
4007                 # print "git diff" header
4008                 print format_git_diff_header_line($patch_line, $diffinfo,
4009                                                   \%from, \%to);
4010
4011                 # print extended diff header
4012                 print "<div class=\"diff extended_header\">\n";
4013         EXTENDED_HEADER:
4014                 while ($patch_line = <$fd>) {
4015                         chomp $patch_line;
4016
4017                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4018
4019                         print format_extended_diff_header_line($patch_line, $diffinfo,
4020                                                                \%from, \%to);
4021                 }
4022                 print "</div>\n"; # class="diff extended_header"
4023
4024                 # from-file/to-file diff header
4025                 if (! $patch_line) {
4026                         print "</div>\n"; # class="patch"
4027                         last PATCH;
4028                 }
4029                 next PATCH if ($patch_line =~ m/^diff /);
4030                 #assert($patch_line =~ m/^---/) if DEBUG;
4031
4032                 my $last_patch_line = $patch_line;
4033                 $patch_line = <$fd>;
4034                 chomp $patch_line;
4035                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4036
4037                 print format_diff_from_to_header($last_patch_line, $patch_line,
4038                                                  $diffinfo, \%from, \%to,
4039                                                  @hash_parents);
4040
4041                 # the patch itself
4042         LINE:
4043                 while ($patch_line = <$fd>) {
4044                         chomp $patch_line;
4045
4046                         next PATCH if ($patch_line =~ m/^diff /);
4047
4048                         print format_diff_line($patch_line, \%from, \%to);
4049                 }
4050
4051         } continue {
4052                 print "</div>\n"; # class="patch"
4053         }
4054
4055         # for compact combined (--cc) format, with chunk and patch simpliciaction
4056         # patchset might be empty, but there might be unprocessed raw lines
4057         for (++$patch_idx if $patch_number > 0;
4058              $patch_idx < @$difftree;
4059              ++$patch_idx) {
4060                 # read and prepare patch information
4061                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4062
4063                 # generate anchor for "patch" links in difftree / whatchanged part
4064                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4065                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4066                       "</div>\n";  # class="patch"
4067
4068                 $patch_number++;
4069         }
4070
4071         if ($patch_number == 0) {
4072                 if (@hash_parents > 1) {
4073                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4074                 } else {
4075                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4076                 }
4077         }
4078
4079         print "</div>\n"; # class="patchset"
4080 }
4081
4082 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4083
4084 # fills project list info (age, description, owner, forks) for each
4085 # project in the list, removing invalid projects from returned list
4086 # NOTE: modifies $projlist, but does not remove entries from it
4087 sub fill_project_list_info {
4088         my ($projlist, $check_forks) = @_;
4089         my @projects;
4090
4091         my $show_ctags = gitweb_check_feature('ctags');
4092  PROJECT:
4093         foreach my $pr (@$projlist) {
4094                 my (@activity) = git_get_last_activity($pr->{'path'});
4095                 unless (@activity) {
4096                         next PROJECT;
4097                 }
4098                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4099                 if (!defined $pr->{'descr'}) {
4100                         my $descr = git_get_project_description($pr->{'path'}) || "";
4101                         $descr = to_utf8($descr);
4102                         $pr->{'descr_long'} = $descr;
4103                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4104                 }
4105                 if (!defined $pr->{'owner'}) {
4106                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4107                 }
4108                 if ($check_forks) {
4109                         my $pname = $pr->{'path'};
4110                         if (($pname =~ s/\.git$//) &&
4111                             ($pname !~ /\/$/) &&
4112                             (-d "$projectroot/$pname")) {
4113                                 $pr->{'forks'} = "-d $projectroot/$pname";
4114                         } else {
4115                                 $pr->{'forks'} = 0;
4116                         }
4117                 }
4118                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4119                 push @projects, $pr;
4120         }
4121
4122         return @projects;
4123 }
4124
4125 # print 'sort by' <th> element, generating 'sort by $name' replay link
4126 # if that order is not selected
4127 sub print_sort_th {
4128         my ($name, $order, $header) = @_;
4129         $header ||= ucfirst($name);
4130
4131         if ($order eq $name) {
4132                 print "<th>$header</th>\n";
4133         } else {
4134                 print "<th>" .
4135                       $cgi->a({-href => href(-replay=>1, order=>$name),
4136                                -class => "header"}, $header) .
4137                       "</th>\n";
4138         }
4139 }
4140
4141 sub git_project_list_body {
4142         # actually uses global variable $project
4143         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4144
4145         my $check_forks = gitweb_check_feature('forks');
4146         my @projects = fill_project_list_info($projlist, $check_forks);
4147
4148         $order ||= $default_projects_order;
4149         $from = 0 unless defined $from;
4150         $to = $#projects if (!defined $to || $#projects < $to);
4151
4152         my %order_info = (
4153                 project => { key => 'path', type => 'str' },
4154                 descr => { key => 'descr_long', type => 'str' },
4155                 owner => { key => 'owner', type => 'str' },
4156                 age => { key => 'age', type => 'num' }
4157         );
4158         my $oi = $order_info{$order};
4159         if ($oi->{'type'} eq 'str') {
4160                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4161         } else {
4162                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4163         }
4164
4165         my $show_ctags = gitweb_check_feature('ctags');
4166         if ($show_ctags) {
4167                 my %ctags;
4168                 foreach my $p (@projects) {
4169                         foreach my $ct (keys %{$p->{'ctags'}}) {
4170                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4171                         }
4172                 }
4173                 my $cloud = git_populate_project_tagcloud(\%ctags);
4174                 print git_show_project_tagcloud($cloud, 64);
4175         }
4176
4177         print "<table class=\"project_list\">\n";
4178         unless ($no_header) {
4179                 print "<tr>\n";
4180                 if ($check_forks) {
4181                         print "<th></th>\n";
4182                 }
4183                 print_sort_th('project', $order, 'Project');
4184                 print_sort_th('descr', $order, 'Description');
4185                 print_sort_th('owner', $order, 'Owner');
4186                 print_sort_th('age', $order, 'Last Change');
4187                 print "<th></th>\n" . # for links
4188                       "</tr>\n";
4189         }
4190         my $alternate = 1;
4191         my $tagfilter = $cgi->param('by_tag');
4192         for (my $i = $from; $i <= $to; $i++) {
4193                 my $pr = $projects[$i];
4194
4195                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4196                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4197                         and not $pr->{'descr_long'} =~ /$searchtext/;
4198                 # Weed out forks or non-matching entries of search
4199                 if ($check_forks) {
4200                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4201                         $forkbase="^$forkbase" if $forkbase;
4202                         next if not $searchtext and not $tagfilter and $show_ctags
4203                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4204                 }
4205
4206                 if ($alternate) {
4207                         print "<tr class=\"dark\">\n";
4208                 } else {
4209                         print "<tr class=\"light\">\n";
4210                 }
4211                 $alternate ^= 1;
4212                 if ($check_forks) {
4213                         print "<td>";
4214                         if ($pr->{'forks'}) {
4215                                 print "<!-- $pr->{'forks'} -->\n";
4216                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4217                         }
4218                         print "</td>\n";
4219                 }
4220                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4221                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4222                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4223                                         -class => "list", -title => $pr->{'descr_long'}},
4224                                         esc_html($pr->{'descr'})) . "</td>\n" .
4225                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4226                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4227                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4228                       "<td class=\"link\">" .
4229                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4230                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4231                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4232                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4233                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4234                       "</td>\n" .
4235                       "</tr>\n";
4236         }
4237         if (defined $extra) {
4238                 print "<tr>\n";
4239                 if ($check_forks) {
4240                         print "<td></td>\n";
4241                 }
4242                 print "<td colspan=\"5\">$extra</td>\n" .
4243                       "</tr>\n";
4244         }
4245         print "</table>\n";
4246 }
4247
4248 sub git_shortlog_body {
4249         # uses global variable $project
4250         my ($commitlist, $from, $to, $refs, $extra) = @_;
4251
4252         $from = 0 unless defined $from;
4253         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4254
4255         print "<table class=\"shortlog\">\n";
4256         my $alternate = 1;
4257         for (my $i = $from; $i <= $to; $i++) {
4258                 my %co = %{$commitlist->[$i]};
4259                 my $commit = $co{'id'};
4260                 my $ref = format_ref_marker($refs, $commit);
4261                 if ($alternate) {
4262                         print "<tr class=\"dark\">\n";
4263                 } else {
4264                         print "<tr class=\"light\">\n";
4265                 }
4266                 $alternate ^= 1;
4267                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4268                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4269                       format_author_html('td', \%co, 10) . "<td>";
4270                 print format_subject_html($co{'title'}, $co{'title_short'},
4271                                           href(action=>"commit", hash=>$commit), $ref);
4272                 print "</td>\n" .
4273                       "<td class=\"link\">" .
4274                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4275                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4276                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4277                 my $snapshot_links = format_snapshot_links($commit);
4278                 if (defined $snapshot_links) {
4279                         print " | " . $snapshot_links;
4280                 }
4281                 print "</td>\n" .
4282                       "</tr>\n";
4283         }
4284         if (defined $extra) {
4285                 print "<tr>\n" .
4286                       "<td colspan=\"4\">$extra</td>\n" .
4287                       "</tr>\n";
4288         }
4289         print "</table>\n";
4290 }
4291
4292 sub git_history_body {
4293         # Warning: assumes constant type (blob or tree) during history
4294         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4295
4296         $from = 0 unless defined $from;
4297         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4298
4299         print "<table class=\"history\">\n";
4300         my $alternate = 1;
4301         for (my $i = $from; $i <= $to; $i++) {
4302                 my %co = %{$commitlist->[$i]};
4303                 if (!%co) {
4304                         next;
4305                 }
4306                 my $commit = $co{'id'};
4307
4308                 my $ref = format_ref_marker($refs, $commit);
4309
4310                 if ($alternate) {
4311                         print "<tr class=\"dark\">\n";
4312                 } else {
4313                         print "<tr class=\"light\">\n";
4314                 }
4315                 $alternate ^= 1;
4316                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4317         # shortlog:   format_author_html('td', \%co, 10)
4318                       format_author_html('td', \%co, 15, 3) . "<td>";
4319                 # originally git_history used chop_str($co{'title'}, 50)
4320                 print format_subject_html($co{'title'}, $co{'title_short'},
4321                                           href(action=>"commit", hash=>$commit), $ref);
4322                 print "</td>\n" .
4323                       "<td class=\"link\">" .
4324                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4325                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4326
4327                 if ($ftype eq 'blob') {
4328                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4329                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4330                         if (defined $blob_current && defined $blob_parent &&
4331                                         $blob_current ne $blob_parent) {
4332                                 print " | " .
4333                                         $cgi->a({-href => href(action=>"blobdiff",
4334                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4335                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4336                                                                file_name=>$file_name)},
4337                                                 "diff to current");
4338                         }
4339                 }
4340                 print "</td>\n" .
4341                       "</tr>\n";
4342         }
4343         if (defined $extra) {
4344                 print "<tr>\n" .
4345                       "<td colspan=\"4\">$extra</td>\n" .
4346                       "</tr>\n";
4347         }
4348         print "</table>\n";
4349 }
4350
4351 sub git_tags_body {
4352         # uses global variable $project
4353         my ($taglist, $from, $to, $extra) = @_;
4354         $from = 0 unless defined $from;
4355         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4356
4357         print "<table class=\"tags\">\n";
4358         my $alternate = 1;
4359         for (my $i = $from; $i <= $to; $i++) {
4360                 my $entry = $taglist->[$i];
4361                 my %tag = %$entry;
4362                 my $comment = $tag{'subject'};
4363                 my $comment_short;
4364                 if (defined $comment) {
4365                         $comment_short = chop_str($comment, 30, 5);
4366                 }
4367                 if ($alternate) {
4368                         print "<tr class=\"dark\">\n";
4369                 } else {
4370                         print "<tr class=\"light\">\n";
4371                 }
4372                 $alternate ^= 1;
4373                 if (defined $tag{'age'}) {
4374                         print "<td><i>$tag{'age'}</i></td>\n";
4375                 } else {
4376                         print "<td></td>\n";
4377                 }
4378                 print "<td>" .
4379                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4380                                -class => "list name"}, esc_html($tag{'name'})) .
4381                       "</td>\n" .
4382                       "<td>";
4383                 if (defined $comment) {
4384                         print format_subject_html($comment, $comment_short,
4385                                                   href(action=>"tag", hash=>$tag{'id'}));
4386                 }
4387                 print "</td>\n" .
4388                       "<td class=\"selflink\">";
4389                 if ($tag{'type'} eq "tag") {
4390                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4391                 } else {
4392                         print "&nbsp;";
4393                 }
4394                 print "</td>\n" .
4395                       "<td class=\"link\">" . " | " .
4396                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4397                 if ($tag{'reftype'} eq "commit") {
4398                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4399                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4400                 } elsif ($tag{'reftype'} eq "blob") {
4401                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4402                 }
4403                 print "</td>\n" .
4404                       "</tr>";
4405         }
4406         if (defined $extra) {
4407                 print "<tr>\n" .
4408                       "<td colspan=\"5\">$extra</td>\n" .
4409                       "</tr>\n";
4410         }
4411         print "</table>\n";
4412 }
4413
4414 sub git_heads_body {
4415         # uses global variable $project
4416         my ($headlist, $head, $from, $to, $extra) = @_;
4417         $from = 0 unless defined $from;
4418         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4419
4420         print "<table class=\"heads\">\n";
4421         my $alternate = 1;
4422         for (my $i = $from; $i <= $to; $i++) {
4423                 my $entry = $headlist->[$i];
4424                 my %ref = %$entry;
4425                 my $curr = $ref{'id'} eq $head;
4426                 if ($alternate) {
4427                         print "<tr class=\"dark\">\n";
4428                 } else {
4429                         print "<tr class=\"light\">\n";
4430                 }
4431                 $alternate ^= 1;
4432                 print "<td><i>$ref{'age'}</i></td>\n" .
4433                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4434                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4435                                -class => "list name"},esc_html($ref{'name'})) .
4436                       "</td>\n" .
4437                       "<td class=\"link\">" .
4438                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4439                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4440                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4441                       "</td>\n" .
4442                       "</tr>";
4443         }
4444         if (defined $extra) {
4445                 print "<tr>\n" .
4446                       "<td colspan=\"3\">$extra</td>\n" .
4447                       "</tr>\n";
4448         }
4449         print "</table>\n";
4450 }
4451
4452 sub git_search_grep_body {
4453         my ($commitlist, $from, $to, $extra) = @_;
4454         $from = 0 unless defined $from;
4455         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4456
4457         print "<table class=\"commit_search\">\n";
4458         my $alternate = 1;
4459         for (my $i = $from; $i <= $to; $i++) {
4460                 my %co = %{$commitlist->[$i]};
4461                 if (!%co) {
4462                         next;
4463                 }
4464                 my $commit = $co{'id'};
4465                 if ($alternate) {
4466                         print "<tr class=\"dark\">\n";
4467                 } else {
4468                         print "<tr class=\"light\">\n";
4469                 }
4470                 $alternate ^= 1;
4471                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4472                       format_author_html('td', \%co, 15, 5) .
4473                       "<td>" .
4474                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4475                                -class => "list subject"},
4476                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4477                 my $comment = $co{'comment'};
4478                 foreach my $line (@$comment) {
4479                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4480                                 my ($lead, $match, $trail) = ($1, $2, $3);
4481                                 $match = chop_str($match, 70, 5, 'center');
4482                                 my $contextlen = int((80 - length($match))/2);
4483                                 $contextlen = 30 if ($contextlen > 30);
4484                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4485                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4486
4487                                 $lead  = esc_html($lead);
4488                                 $match = esc_html($match);
4489                                 $trail = esc_html($trail);
4490
4491                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4492                         }
4493                 }
4494                 print "</td>\n" .
4495                       "<td class=\"link\">" .
4496                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4497                       " | " .
4498                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4499                       " | " .
4500                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4501                 print "</td>\n" .
4502                       "</tr>\n";
4503         }
4504         if (defined $extra) {
4505                 print "<tr>\n" .
4506                       "<td colspan=\"3\">$extra</td>\n" .
4507                       "</tr>\n";
4508         }
4509         print "</table>\n";
4510 }
4511
4512 ## ======================================================================
4513 ## ======================================================================
4514 ## actions
4515
4516 sub git_project_list {
4517         my $order = $input_params{'order'};
4518         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4519                 die_error(400, "Unknown order parameter");
4520         }
4521
4522         my @list = git_get_projects_list();
4523         if (!@list) {
4524                 die_error(404, "No projects found");
4525         }
4526
4527         git_header_html();
4528         if (-f $home_text) {
4529                 print "<div class=\"index_include\">\n";
4530                 insert_file($home_text);
4531                 print "</div>\n";
4532         }
4533         print $cgi->startform(-method => "get") .
4534               "<p class=\"projsearch\">Search:\n" .
4535               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4536               "</p>" .
4537               $cgi->end_form() . "\n";
4538         git_project_list_body(\@list, $order);
4539         git_footer_html();
4540 }
4541
4542 sub git_forks {
4543         my $order = $input_params{'order'};
4544         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4545                 die_error(400, "Unknown order parameter");
4546         }
4547
4548         my @list = git_get_projects_list($project);
4549         if (!@list) {
4550                 die_error(404, "No forks found");
4551         }
4552
4553         git_header_html();
4554         git_print_page_nav('','');
4555         git_print_header_div('summary', "$project forks");
4556         git_project_list_body(\@list, $order);
4557         git_footer_html();
4558 }
4559
4560 sub git_project_index {
4561         my @projects = git_get_projects_list($project);
4562
4563         print $cgi->header(
4564                 -type => 'text/plain',
4565                 -charset => 'utf-8',
4566                 -content_disposition => 'inline; filename="index.aux"');
4567
4568         foreach my $pr (@projects) {
4569                 if (!exists $pr->{'owner'}) {
4570                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4571                 }
4572
4573                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4574                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4575                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4576                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4577                 $path  =~ s/ /\+/g;
4578                 $owner =~ s/ /\+/g;
4579
4580                 print "$path $owner\n";
4581         }
4582 }
4583
4584 sub git_summary {
4585         my $descr = git_get_project_description($project) || "none";
4586         my %co = parse_commit("HEAD");
4587         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4588         my $head = $co{'id'};
4589
4590         my $owner = git_get_project_owner($project);
4591
4592         my $refs = git_get_references();
4593         # These get_*_list functions return one more to allow us to see if
4594         # there are more ...
4595         my @taglist  = git_get_tags_list(16);
4596         my @headlist = git_get_heads_list(16);
4597         my @forklist;
4598         my $check_forks = gitweb_check_feature('forks');
4599
4600         if ($check_forks) {
4601                 @forklist = git_get_projects_list($project);
4602         }
4603
4604         git_header_html();
4605         git_print_page_nav('summary','', $head);
4606
4607         print "<div class=\"title\">&nbsp;</div>\n";
4608         print "<table class=\"projects_list\">\n" .
4609               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4610               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4611         if (defined $cd{'rfc2822'}) {
4612                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4613         }
4614
4615         # use per project git URL list in $projectroot/$project/cloneurl
4616         # or make project git URL from git base URL and project name
4617         my $url_tag = "URL";
4618         my @url_list = git_get_project_url_list($project);
4619         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4620         foreach my $git_url (@url_list) {
4621                 next unless $git_url;
4622                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4623                 $url_tag = "";
4624         }
4625
4626         # Tag cloud
4627         my $show_ctags = gitweb_check_feature('ctags');
4628         if ($show_ctags) {
4629                 my $ctags = git_get_project_ctags($project);
4630                 my $cloud = git_populate_project_tagcloud($ctags);
4631                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4632                 print "</td>\n<td>" unless %$ctags;
4633                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4634                 print "</td>\n<td>" if %$ctags;
4635                 print git_show_project_tagcloud($cloud, 48);
4636                 print "</td></tr>";
4637         }
4638
4639         print "</table>\n";
4640
4641         # If XSS prevention is on, we don't include README.html.
4642         # TODO: Allow a readme in some safe format.
4643         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4644                 print "<div class=\"title\">readme</div>\n" .
4645                       "<div class=\"readme\">\n";
4646                 insert_file("$projectroot/$project/README.html");
4647                 print "\n</div>\n"; # class="readme"
4648         }
4649
4650         # we need to request one more than 16 (0..15) to check if
4651         # those 16 are all
4652         my @commitlist = $head ? parse_commits($head, 17) : ();
4653         if (@commitlist) {
4654                 git_print_header_div('shortlog');
4655                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4656                                   $#commitlist <=  15 ? undef :
4657                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4658         }
4659
4660         if (@taglist) {
4661                 git_print_header_div('tags');
4662                 git_tags_body(\@taglist, 0, 15,
4663                               $#taglist <=  15 ? undef :
4664                               $cgi->a({-href => href(action=>"tags")}, "..."));
4665         }
4666
4667         if (@headlist) {
4668                 git_print_header_div('heads');
4669                 git_heads_body(\@headlist, $head, 0, 15,
4670                                $#headlist <= 15 ? undef :
4671                                $cgi->a({-href => href(action=>"heads")}, "..."));
4672         }
4673
4674         if (@forklist) {
4675                 git_print_header_div('forks');
4676                 git_project_list_body(\@forklist, 'age', 0, 15,
4677                                       $#forklist <= 15 ? undef :
4678                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4679                                       'no_header');
4680         }
4681
4682         git_footer_html();
4683 }
4684
4685 sub git_tag {
4686         my $head = git_get_head_hash($project);
4687         git_header_html();
4688         git_print_page_nav('','', $head,undef,$head);
4689         my %tag = parse_tag($hash);
4690
4691         if (! %tag) {
4692                 die_error(404, "Unknown tag object");
4693         }
4694
4695         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4696         print "<div class=\"title_text\">\n" .
4697               "<table class=\"object_header\">\n" .
4698               "<tr>\n" .
4699               "<td>object</td>\n" .
4700               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4701                                $tag{'object'}) . "</td>\n" .
4702               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4703                                               $tag{'type'}) . "</td>\n" .
4704               "</tr>\n";
4705         if (defined($tag{'author'})) {
4706                 git_print_authorship_rows(\%tag, 'author');
4707         }
4708         print "</table>\n\n" .
4709               "</div>\n";
4710         print "<div class=\"page_body\">";
4711         my $comment = $tag{'comment'};
4712         foreach my $line (@$comment) {
4713                 chomp $line;
4714                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4715         }
4716         print "</div>\n";
4717         git_footer_html();
4718 }
4719
4720 sub git_blame {
4721         # permissions
4722         gitweb_check_feature('blame')
4723                 or die_error(403, "Blame view not allowed");
4724
4725         # error checking
4726         die_error(400, "No file name given") unless $file_name;
4727         $hash_base ||= git_get_head_hash($project);
4728         die_error(404, "Couldn't find base commit") unless $hash_base;
4729         my %co = parse_commit($hash_base)
4730                 or die_error(404, "Commit not found");
4731         my $ftype = "blob";
4732         if (!defined $hash) {
4733                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4734                         or die_error(404, "Error looking up file");
4735         } else {
4736                 $ftype = git_get_type($hash);
4737                 if ($ftype !~ "blob") {
4738                         die_error(400, "Object is not a blob");
4739                 }
4740         }
4741
4742         # run git-blame --porcelain
4743         open my $fd, "-|", git_cmd(), "blame", '-p',
4744                 $hash_base, '--', $file_name
4745                 or die_error(500, "Open git-blame failed");
4746
4747         # page header
4748         git_header_html();
4749         my $formats_nav =
4750                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4751                         "blob") .
4752                 " | " .
4753                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4754                         "history") .
4755                 " | " .
4756                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4757                         "HEAD");
4758         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4759         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4760         git_print_page_path($file_name, $ftype, $hash_base);
4761
4762         # page body
4763         my @rev_color = qw(light2 dark2);
4764         my $num_colors = scalar(@rev_color);
4765         my $current_color = 0;
4766         my %metainfo = ();
4767
4768         print <<HTML;
4769 <div class="page_body">
4770 <table class="blame">
4771 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4772 HTML
4773  LINE:
4774         while (my $line = <$fd>) {
4775                 chomp $line;
4776                 # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
4777                 # no <lines in group> for subsequent lines in group of lines
4778                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4779                    ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
4780                 if (!exists $metainfo{$full_rev}) {
4781                         $metainfo{$full_rev} = {};
4782                 }
4783                 my $meta = $metainfo{$full_rev};
4784                 my $data;
4785                 while ($data = <$fd>) {
4786                         chomp $data;
4787                         last if ($data =~ s/^\t//); # contents of line
4788                         if ($data =~ /^(\S+) (.*)$/) {
4789                                 $meta->{$1} = $2;
4790                         }
4791                 }
4792                 my $short_rev = substr($full_rev, 0, 8);
4793                 my $author = $meta->{'author'};
4794                 my %date =
4795                         parse_date($meta->{'author-time'}, $meta->{'author-tz'});
4796                 my $date = $date{'iso-tz'};
4797                 if ($group_size) {
4798                         $current_color = ($current_color + 1) % $num_colors;
4799                 }
4800                 print "<tr id=\"l$lineno\" class=\"$rev_color[$current_color]\">\n";
4801                 if ($group_size) {
4802                         print "<td class=\"sha1\"";
4803                         print " title=\"". esc_html($author) . ", $date\"";
4804                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4805                         print ">";
4806                         print $cgi->a({-href => href(action=>"commit",
4807                                                      hash=>$full_rev,
4808                                                      file_name=>$file_name)},
4809                                       esc_html($short_rev));
4810                         print "</td>\n";
4811                 }
4812                 my $parent_commit;
4813                 if (!exists $meta->{'parent'}) {
4814                         open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4815                                 or die_error(500, "Open git-rev-parse failed");
4816                         $parent_commit = <$dd>;
4817                         close $dd;
4818                         chomp($parent_commit);
4819                         $meta->{'parent'} = $parent_commit;
4820                 } else {
4821                         $parent_commit = $meta->{'parent'};
4822                 }
4823                 my $blamed = href(action => 'blame',
4824                                   file_name => $meta->{'filename'},
4825                                   hash_base => $parent_commit);
4826                 print "<td class=\"linenr\">";
4827                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4828                                 -class => "linenr" },
4829                               esc_html($lineno));
4830                 print "</td>";
4831                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4832                 print "</tr>\n";
4833         }
4834         print "</table>\n";
4835         print "</div>";
4836         close $fd
4837                 or print "Reading blob failed\n";
4838
4839         # page footer
4840         git_footer_html();
4841 }
4842
4843 sub git_tags {
4844         my $head = git_get_head_hash($project);
4845         git_header_html();
4846         git_print_page_nav('','', $head,undef,$head);
4847         git_print_header_div('summary', $project);
4848
4849         my @tagslist = git_get_tags_list();
4850         if (@tagslist) {
4851                 git_tags_body(\@tagslist);
4852         }
4853         git_footer_html();
4854 }
4855
4856 sub git_heads {
4857         my $head = git_get_head_hash($project);
4858         git_header_html();
4859         git_print_page_nav('','', $head,undef,$head);
4860         git_print_header_div('summary', $project);
4861
4862         my @headslist = git_get_heads_list();
4863         if (@headslist) {
4864                 git_heads_body(\@headslist, $head);
4865         }
4866         git_footer_html();
4867 }
4868
4869 sub git_blob_plain {
4870         my $type = shift;
4871         my $expires;
4872
4873         if (!defined $hash) {
4874                 if (defined $file_name) {
4875                         my $base = $hash_base || git_get_head_hash($project);
4876                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4877                                 or die_error(404, "Cannot find file");
4878                 } else {
4879                         die_error(400, "No file name defined");
4880                 }
4881         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4882                 # blobs defined by non-textual hash id's can be cached
4883                 $expires = "+1d";
4884         }
4885
4886         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4887                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4888
4889         # content-type (can include charset)
4890         $type = blob_contenttype($fd, $file_name, $type);
4891
4892         # "save as" filename, even when no $file_name is given
4893         my $save_as = "$hash";
4894         if (defined $file_name) {
4895                 $save_as = $file_name;
4896         } elsif ($type =~ m/^text\//) {
4897                 $save_as .= '.txt';
4898         }
4899
4900         # With XSS prevention on, blobs of all types except a few known safe
4901         # ones are served with "Content-Disposition: attachment" to make sure
4902         # they don't run in our security domain.  For certain image types,
4903         # blob view writes an <img> tag referring to blob_plain view, and we
4904         # want to be sure not to break that by serving the image as an
4905         # attachment (though Firefox 3 doesn't seem to care).
4906         my $sandbox = $prevent_xss &&
4907                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
4908
4909         print $cgi->header(
4910                 -type => $type,
4911                 -expires => $expires,
4912                 -content_disposition =>
4913                         ($sandbox ? 'attachment' : 'inline')
4914                         . '; filename="' . $save_as . '"');
4915         local $/ = undef;
4916         binmode STDOUT, ':raw';
4917         print <$fd>;
4918         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4919         close $fd;
4920 }
4921
4922 sub git_blob {
4923         my $expires;
4924
4925         if (!defined $hash) {
4926                 if (defined $file_name) {
4927                         my $base = $hash_base || git_get_head_hash($project);
4928                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4929                                 or die_error(404, "Cannot find file");
4930                 } else {
4931                         die_error(400, "No file name defined");
4932                 }
4933         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4934                 # blobs defined by non-textual hash id's can be cached
4935                 $expires = "+1d";
4936         }
4937
4938         my $have_blame = gitweb_check_feature('blame');
4939         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4940                 or die_error(500, "Couldn't cat $file_name, $hash");
4941         my $mimetype = blob_mimetype($fd, $file_name);
4942         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4943                 close $fd;
4944                 return git_blob_plain($mimetype);
4945         }
4946         # we can have blame only for text/* mimetype
4947         $have_blame &&= ($mimetype =~ m!^text/!);
4948
4949         git_header_html(undef, $expires);
4950         my $formats_nav = '';
4951         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4952                 if (defined $file_name) {
4953                         if ($have_blame) {
4954                                 $formats_nav .=
4955                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4956                                                 "blame") .
4957                                         " | ";
4958                         }
4959                         $formats_nav .=
4960                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4961                                         "history") .
4962                                 " | " .
4963                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4964                                         "raw") .
4965                                 " | " .
4966                                 $cgi->a({-href => href(action=>"blob",
4967                                                        hash_base=>"HEAD", file_name=>$file_name)},
4968                                         "HEAD");
4969                 } else {
4970                         $formats_nav .=
4971                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4972                                         "raw");
4973                 }
4974                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4975                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4976         } else {
4977                 print "<div class=\"page_nav\">\n" .
4978                       "<br/><br/></div>\n" .
4979                       "<div class=\"title\">$hash</div>\n";
4980         }
4981         git_print_page_path($file_name, "blob", $hash_base);
4982         print "<div class=\"page_body\">\n";
4983         if ($mimetype =~ m!^image/!) {
4984                 print qq!<img type="$mimetype"!;
4985                 if ($file_name) {
4986                         print qq! alt="$file_name" title="$file_name"!;
4987                 }
4988                 print qq! src="! .
4989                       href(action=>"blob_plain", hash=>$hash,
4990                            hash_base=>$hash_base, file_name=>$file_name) .
4991                       qq!" />\n!;
4992         } else {
4993                 my $nr;
4994                 while (my $line = <$fd>) {
4995                         chomp $line;
4996                         $nr++;
4997                         $line = untabify($line);
4998                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4999                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
5000                 }
5001         }
5002         close $fd
5003                 or print "Reading blob failed.\n";
5004         print "</div>";
5005         git_footer_html();
5006 }
5007
5008 sub git_tree {
5009         if (!defined $hash_base) {
5010                 $hash_base = "HEAD";
5011         }
5012         if (!defined $hash) {
5013                 if (defined $file_name) {
5014                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5015                 } else {
5016                         $hash = $hash_base;
5017                 }
5018         }
5019         die_error(404, "No such tree") unless defined($hash);
5020
5021         my @entries = ();
5022         {
5023                 local $/ = "\0";
5024                 open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
5025                         or die_error(500, "Open git-ls-tree failed");
5026                 @entries = map { chomp; $_ } <$fd>;
5027                 close $fd
5028                         or die_error(404, "Reading tree failed");
5029         }
5030
5031         my $refs = git_get_references();
5032         my $ref = format_ref_marker($refs, $hash_base);
5033         git_header_html();
5034         my $basedir = '';
5035         my $have_blame = gitweb_check_feature('blame');
5036         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5037                 my @views_nav = ();
5038                 if (defined $file_name) {
5039                         push @views_nav,
5040                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5041                                         "history"),
5042                                 $cgi->a({-href => href(action=>"tree",
5043                                                        hash_base=>"HEAD", file_name=>$file_name)},
5044                                         "HEAD"),
5045                 }
5046                 my $snapshot_links = format_snapshot_links($hash);
5047                 if (defined $snapshot_links) {
5048                         # FIXME: Should be available when we have no hash base as well.
5049                         push @views_nav, $snapshot_links;
5050                 }
5051                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
5052                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5053         } else {
5054                 undef $hash_base;
5055                 print "<div class=\"page_nav\">\n";
5056                 print "<br/><br/></div>\n";
5057                 print "<div class=\"title\">$hash</div>\n";
5058         }
5059         if (defined $file_name) {
5060                 $basedir = $file_name;
5061                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5062                         $basedir .= '/';
5063                 }
5064                 git_print_page_path($file_name, 'tree', $hash_base);
5065         }
5066         print "<div class=\"page_body\">\n";
5067         print "<table class=\"tree\">\n";
5068         my $alternate = 1;
5069         # '..' (top directory) link if possible
5070         if (defined $hash_base &&
5071             defined $file_name && $file_name =~ m![^/]+$!) {
5072                 if ($alternate) {
5073                         print "<tr class=\"dark\">\n";
5074                 } else {
5075                         print "<tr class=\"light\">\n";
5076                 }
5077                 $alternate ^= 1;
5078
5079                 my $up = $file_name;
5080                 $up =~ s!/?[^/]+$!!;
5081                 undef $up unless $up;
5082                 # based on git_print_tree_entry
5083                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5084                 print '<td class="list">';
5085                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
5086                                              file_name=>$up)},
5087                               "..");
5088                 print "</td>\n";
5089                 print "<td class=\"link\"></td>\n";
5090
5091                 print "</tr>\n";
5092         }
5093         foreach my $line (@entries) {
5094                 my %t = parse_ls_tree_line($line, -z => 1);
5095
5096                 if ($alternate) {
5097                         print "<tr class=\"dark\">\n";
5098                 } else {
5099                         print "<tr class=\"light\">\n";
5100                 }
5101                 $alternate ^= 1;
5102
5103                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5104
5105                 print "</tr>\n";
5106         }
5107         print "</table>\n" .
5108               "</div>";
5109         git_footer_html();
5110 }
5111
5112 sub git_snapshot {
5113         my $format = $input_params{'snapshot_format'};
5114         if (!@snapshot_fmts) {
5115                 die_error(403, "Snapshots not allowed");
5116         }
5117         # default to first supported snapshot format
5118         $format ||= $snapshot_fmts[0];
5119         if ($format !~ m/^[a-z0-9]+$/) {
5120                 die_error(400, "Invalid snapshot format parameter");
5121         } elsif (!exists($known_snapshot_formats{$format})) {
5122                 die_error(400, "Unknown snapshot format");
5123         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5124                 die_error(403, "Unsupported snapshot format");
5125         }
5126
5127         if (!defined $hash) {
5128                 $hash = git_get_head_hash($project);
5129         }
5130
5131         my $name = $project;
5132         $name =~ s,([^/])/*\.git$,$1,;
5133         $name = basename($name);
5134         my $filename = to_utf8($name);
5135         $name =~ s/\047/\047\\\047\047/g;
5136         my $cmd;
5137         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
5138         $cmd = quote_command(
5139                 git_cmd(), 'archive',
5140                 "--format=$known_snapshot_formats{$format}{'format'}",
5141                 "--prefix=$name/", $hash);
5142         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5143                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5144         }
5145
5146         print $cgi->header(
5147                 -type => $known_snapshot_formats{$format}{'type'},
5148                 -content_disposition => 'inline; filename="' . "$filename" . '"',
5149                 -status => '200 OK');
5150
5151         open my $fd, "-|", $cmd
5152                 or die_error(500, "Execute git-archive failed");
5153         binmode STDOUT, ':raw';
5154         print <$fd>;
5155         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5156         close $fd;
5157 }
5158
5159 sub git_log {
5160         my $head = git_get_head_hash($project);
5161         if (!defined $hash) {
5162                 $hash = $head;
5163         }
5164         if (!defined $page) {
5165                 $page = 0;
5166         }
5167         my $refs = git_get_references();
5168
5169         my @commitlist = parse_commits($hash, 101, (100 * $page));
5170
5171         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
5172
5173         my ($patch_max) = gitweb_get_feature('patches');
5174         if ($patch_max) {
5175                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5176                         $paging_nav .= " &sdot; " .
5177                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5178                                         "patches");
5179                 }
5180         }
5181
5182         git_header_html();
5183         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5184
5185         if (!@commitlist) {
5186                 my %co = parse_commit($hash);
5187
5188                 git_print_header_div('summary', $project);
5189                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5190         }
5191         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5192         for (my $i = 0; $i <= $to; $i++) {
5193                 my %co = %{$commitlist[$i]};
5194                 next if !%co;
5195                 my $commit = $co{'id'};
5196                 my $ref = format_ref_marker($refs, $commit);
5197                 my %ad = parse_date($co{'author_epoch'});
5198                 git_print_header_div('commit',
5199                                "<span class=\"age\">$co{'age_string'}</span>" .
5200                                esc_html($co{'title'}) . $ref,
5201                                $commit);
5202                 print "<div class=\"title_text\">\n" .
5203                       "<div class=\"log_link\">\n" .
5204                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5205                       " | " .
5206                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5207                       " | " .
5208                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5209                       "<br/>\n" .
5210                       "</div>\n";
5211                       git_print_authorship(\%co, -tag => 'span');
5212                       print "<br/>\n</div>\n";
5213
5214                 print "<div class=\"log_body\">\n";
5215                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5216                 print "</div>\n";
5217         }
5218         if ($#commitlist >= 100) {
5219                 print "<div class=\"page_nav\">\n";
5220                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5221                                -accesskey => "n", -title => "Alt-n"}, "next");
5222                 print "</div>\n";
5223         }
5224         git_footer_html();
5225 }
5226
5227 sub git_commit {
5228         $hash ||= $hash_base || "HEAD";
5229         my %co = parse_commit($hash)
5230             or die_error(404, "Unknown commit object");
5231
5232         my $parent  = $co{'parent'};
5233         my $parents = $co{'parents'}; # listref
5234
5235         # we need to prepare $formats_nav before any parameter munging
5236         my $formats_nav;
5237         if (!defined $parent) {
5238                 # --root commitdiff
5239                 $formats_nav .= '(initial)';
5240         } elsif (@$parents == 1) {
5241                 # single parent commit
5242                 $formats_nav .=
5243                         '(parent: ' .
5244                         $cgi->a({-href => href(action=>"commit",
5245                                                hash=>$parent)},
5246                                 esc_html(substr($parent, 0, 7))) .
5247                         ')';
5248         } else {
5249                 # merge commit
5250                 $formats_nav .=
5251                         '(merge: ' .
5252                         join(' ', map {
5253                                 $cgi->a({-href => href(action=>"commit",
5254                                                        hash=>$_)},
5255                                         esc_html(substr($_, 0, 7)));
5256                         } @$parents ) .
5257                         ')';
5258         }
5259         if (gitweb_check_feature('patches')) {
5260                 $formats_nav .= " | " .
5261                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5262                                 "patch");
5263         }
5264
5265         if (!defined $parent) {
5266                 $parent = "--root";
5267         }
5268         my @difftree;
5269         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5270                 @diff_opts,
5271                 (@$parents <= 1 ? $parent : '-c'),
5272                 $hash, "--"
5273                 or die_error(500, "Open git-diff-tree failed");
5274         @difftree = map { chomp; $_ } <$fd>;
5275         close $fd or die_error(404, "Reading git-diff-tree failed");
5276
5277         # non-textual hash id's can be cached
5278         my $expires;
5279         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5280                 $expires = "+1d";
5281         }
5282         my $refs = git_get_references();
5283         my $ref = format_ref_marker($refs, $co{'id'});
5284
5285         git_header_html(undef, $expires);
5286         git_print_page_nav('commit', '',
5287                            $hash, $co{'tree'}, $hash,
5288                            $formats_nav);
5289
5290         if (defined $co{'parent'}) {
5291                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5292         } else {
5293                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5294         }
5295         print "<div class=\"title_text\">\n" .
5296               "<table class=\"object_header\">\n";
5297         git_print_authorship_rows(\%co);
5298         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5299         print "<tr>" .
5300               "<td>tree</td>" .
5301               "<td class=\"sha1\">" .
5302               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5303                        class => "list"}, $co{'tree'}) .
5304               "</td>" .
5305               "<td class=\"link\">" .
5306               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5307                       "tree");
5308         my $snapshot_links = format_snapshot_links($hash);
5309         if (defined $snapshot_links) {
5310                 print " | " . $snapshot_links;
5311         }
5312         print "</td>" .
5313               "</tr>\n";
5314
5315         foreach my $par (@$parents) {
5316                 print "<tr>" .
5317                       "<td>parent</td>" .
5318                       "<td class=\"sha1\">" .
5319                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5320                                class => "list"}, $par) .
5321                       "</td>" .
5322                       "<td class=\"link\">" .
5323                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5324                       " | " .
5325                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5326                       "</td>" .
5327                       "</tr>\n";
5328         }
5329         print "</table>".
5330               "</div>\n";
5331
5332         print "<div class=\"page_body\">\n";
5333         git_print_log($co{'comment'});
5334         print "</div>\n";
5335
5336         git_difftree_body(\@difftree, $hash, @$parents);
5337
5338         git_footer_html();
5339 }
5340
5341 sub git_object {
5342         # object is defined by:
5343         # - hash or hash_base alone
5344         # - hash_base and file_name
5345         my $type;
5346
5347         # - hash or hash_base alone
5348         if ($hash || ($hash_base && !defined $file_name)) {
5349                 my $object_id = $hash || $hash_base;
5350
5351                 open my $fd, "-|", quote_command(
5352                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5353                         or die_error(404, "Object does not exist");
5354                 $type = <$fd>;
5355                 chomp $type;
5356                 close $fd
5357                         or die_error(404, "Object does not exist");
5358
5359         # - hash_base and file_name
5360         } elsif ($hash_base && defined $file_name) {
5361                 $file_name =~ s,/+$,,;
5362
5363                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5364                         or die_error(404, "Base object does not exist");
5365
5366                 # here errors should not hapen
5367                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5368                         or die_error(500, "Open git-ls-tree failed");
5369                 my $line = <$fd>;
5370                 close $fd;
5371
5372                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5373                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5374                         die_error(404, "File or directory for given base does not exist");
5375                 }
5376                 $type = $2;
5377                 $hash = $3;
5378         } else {
5379                 die_error(400, "Not enough information to find object");
5380         }
5381
5382         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5383                                           hash=>$hash, hash_base=>$hash_base,
5384                                           file_name=>$file_name),
5385                              -status => '302 Found');
5386 }
5387
5388 sub git_blobdiff {
5389         my $format = shift || 'html';
5390
5391         my $fd;
5392         my @difftree;
5393         my %diffinfo;
5394         my $expires;
5395
5396         # preparing $fd and %diffinfo for git_patchset_body
5397         # new style URI
5398         if (defined $hash_base && defined $hash_parent_base) {
5399                 if (defined $file_name) {
5400                         # read raw output
5401                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5402                                 $hash_parent_base, $hash_base,
5403                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5404                                 or die_error(500, "Open git-diff-tree failed");
5405                         @difftree = map { chomp; $_ } <$fd>;
5406                         close $fd
5407                                 or die_error(404, "Reading git-diff-tree failed");
5408                         @difftree
5409                                 or die_error(404, "Blob diff not found");
5410
5411                 } elsif (defined $hash &&
5412                          $hash =~ /[0-9a-fA-F]{40}/) {
5413                         # try to find filename from $hash
5414
5415                         # read filtered raw output
5416                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5417                                 $hash_parent_base, $hash_base, "--"
5418                                 or die_error(500, "Open git-diff-tree failed");
5419                         @difftree =
5420                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5421                                 # $hash == to_id
5422                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5423                                 map { chomp; $_ } <$fd>;
5424                         close $fd
5425                                 or die_error(404, "Reading git-diff-tree failed");
5426                         @difftree
5427                                 or die_error(404, "Blob diff not found");
5428
5429                 } else {
5430                         die_error(400, "Missing one of the blob diff parameters");
5431                 }
5432
5433                 if (@difftree > 1) {
5434                         die_error(400, "Ambiguous blob diff specification");
5435                 }
5436
5437                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5438                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5439                 $file_name   ||= $diffinfo{'to_file'};
5440
5441                 $hash_parent ||= $diffinfo{'from_id'};
5442                 $hash        ||= $diffinfo{'to_id'};
5443
5444                 # non-textual hash id's can be cached
5445                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5446                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5447                         $expires = '+1d';
5448                 }
5449
5450                 # open patch output
5451                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5452                         '-p', ($format eq 'html' ? "--full-index" : ()),
5453                         $hash_parent_base, $hash_base,
5454                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5455                         or die_error(500, "Open git-diff-tree failed");
5456         }
5457
5458         # old/legacy style URI -- not generated anymore since 1.4.3.
5459         if (!%diffinfo) {
5460                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5461         }
5462
5463         # header
5464         if ($format eq 'html') {
5465                 my $formats_nav =
5466                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5467                                 "raw");
5468                 git_header_html(undef, $expires);
5469                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5470                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5471                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5472                 } else {
5473                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5474                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5475                 }
5476                 if (defined $file_name) {
5477                         git_print_page_path($file_name, "blob", $hash_base);
5478                 } else {
5479                         print "<div class=\"page_path\"></div>\n";
5480                 }
5481
5482         } elsif ($format eq 'plain') {
5483                 print $cgi->header(
5484                         -type => 'text/plain',
5485                         -charset => 'utf-8',
5486                         -expires => $expires,
5487                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5488
5489                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5490
5491         } else {
5492                 die_error(400, "Unknown blobdiff format");
5493         }
5494
5495         # patch
5496         if ($format eq 'html') {
5497                 print "<div class=\"page_body\">\n";
5498
5499                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5500                 close $fd;
5501
5502                 print "</div>\n"; # class="page_body"
5503                 git_footer_html();
5504
5505         } else {
5506                 while (my $line = <$fd>) {
5507                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5508                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5509
5510                         print $line;
5511
5512                         last if $line =~ m!^\+\+\+!;
5513                 }
5514                 local $/ = undef;
5515                 print <$fd>;
5516                 close $fd;
5517         }
5518 }
5519
5520 sub git_blobdiff_plain {
5521         git_blobdiff('plain');
5522 }
5523
5524 sub git_commitdiff {
5525         my %params = @_;
5526         my $format = $params{-format} || 'html';
5527
5528         my ($patch_max) = gitweb_get_feature('patches');
5529         if ($format eq 'patch') {
5530                 die_error(403, "Patch view not allowed") unless $patch_max;
5531         }
5532
5533         $hash ||= $hash_base || "HEAD";
5534         my %co = parse_commit($hash)
5535             or die_error(404, "Unknown commit object");
5536
5537         # choose format for commitdiff for merge
5538         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5539                 $hash_parent = '--cc';
5540         }
5541         # we need to prepare $formats_nav before almost any parameter munging
5542         my $formats_nav;
5543         if ($format eq 'html') {
5544                 $formats_nav =
5545                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5546                                 "raw");
5547                 if ($patch_max) {
5548                         $formats_nav .= " | " .
5549                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5550                                         "patch");
5551                 }
5552
5553                 if (defined $hash_parent &&
5554                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5555                         # commitdiff with two commits given
5556                         my $hash_parent_short = $hash_parent;
5557                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5558                                 $hash_parent_short = substr($hash_parent, 0, 7);
5559                         }
5560                         $formats_nav .=
5561                                 ' (from';
5562                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5563                                 if ($co{'parents'}[$i] eq $hash_parent) {
5564                                         $formats_nav .= ' parent ' . ($i+1);
5565                                         last;
5566                                 }
5567                         }
5568                         $formats_nav .= ': ' .
5569                                 $cgi->a({-href => href(action=>"commitdiff",
5570                                                        hash=>$hash_parent)},
5571                                         esc_html($hash_parent_short)) .
5572                                 ')';
5573                 } elsif (!$co{'parent'}) {
5574                         # --root commitdiff
5575                         $formats_nav .= ' (initial)';
5576                 } elsif (scalar @{$co{'parents'}} == 1) {
5577                         # single parent commit
5578                         $formats_nav .=
5579                                 ' (parent: ' .
5580                                 $cgi->a({-href => href(action=>"commitdiff",
5581                                                        hash=>$co{'parent'})},
5582                                         esc_html(substr($co{'parent'}, 0, 7))) .
5583                                 ')';
5584                 } else {
5585                         # merge commit
5586                         if ($hash_parent eq '--cc') {
5587                                 $formats_nav .= ' | ' .
5588                                         $cgi->a({-href => href(action=>"commitdiff",
5589                                                                hash=>$hash, hash_parent=>'-c')},
5590                                                 'combined');
5591                         } else { # $hash_parent eq '-c'
5592                                 $formats_nav .= ' | ' .
5593                                         $cgi->a({-href => href(action=>"commitdiff",
5594                                                                hash=>$hash, hash_parent=>'--cc')},
5595                                                 'compact');
5596                         }
5597                         $formats_nav .=
5598                                 ' (merge: ' .
5599                                 join(' ', map {
5600                                         $cgi->a({-href => href(action=>"commitdiff",
5601                                                                hash=>$_)},
5602                                                 esc_html(substr($_, 0, 7)));
5603                                 } @{$co{'parents'}} ) .
5604                                 ')';
5605                 }
5606         }
5607
5608         my $hash_parent_param = $hash_parent;
5609         if (!defined $hash_parent_param) {
5610                 # --cc for multiple parents, --root for parentless
5611                 $hash_parent_param =
5612                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5613         }
5614
5615         # read commitdiff
5616         my $fd;
5617         my @difftree;
5618         if ($format eq 'html') {
5619                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5620                         "--no-commit-id", "--patch-with-raw", "--full-index",
5621                         $hash_parent_param, $hash, "--"
5622                         or die_error(500, "Open git-diff-tree failed");
5623
5624                 while (my $line = <$fd>) {
5625                         chomp $line;
5626                         # empty line ends raw part of diff-tree output
5627                         last unless $line;
5628                         push @difftree, scalar parse_difftree_raw_line($line);
5629                 }
5630
5631         } elsif ($format eq 'plain') {
5632                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5633                         '-p', $hash_parent_param, $hash, "--"
5634                         or die_error(500, "Open git-diff-tree failed");
5635         } elsif ($format eq 'patch') {
5636                 # For commit ranges, we limit the output to the number of
5637                 # patches specified in the 'patches' feature.
5638                 # For single commits, we limit the output to a single patch,
5639                 # diverging from the git-format-patch default.
5640                 my @commit_spec = ();
5641                 if ($hash_parent) {
5642                         if ($patch_max > 0) {
5643                                 push @commit_spec, "-$patch_max";
5644                         }
5645                         push @commit_spec, '-n', "$hash_parent..$hash";
5646                 } else {
5647                         if ($params{-single}) {
5648                                 push @commit_spec, '-1';
5649                         } else {
5650                                 if ($patch_max > 0) {
5651                                         push @commit_spec, "-$patch_max";
5652                                 }
5653                                 push @commit_spec, "-n";
5654                         }
5655                         push @commit_spec, '--root', $hash;
5656                 }
5657                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5658                         '--stdout', @commit_spec
5659                         or die_error(500, "Open git-format-patch failed");
5660         } else {
5661                 die_error(400, "Unknown commitdiff format");
5662         }
5663
5664         # non-textual hash id's can be cached
5665         my $expires;
5666         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5667                 $expires = "+1d";
5668         }
5669
5670         # write commit message
5671         if ($format eq 'html') {
5672                 my $refs = git_get_references();
5673                 my $ref = format_ref_marker($refs, $co{'id'});
5674
5675                 git_header_html(undef, $expires);
5676                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5677                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5678                 print "<div class=\"title_text\">\n" .
5679                       "<table class=\"object_header\">\n";
5680                 git_print_authorship_rows(\%co);
5681                 print "</table>".
5682                       "</div>\n";
5683                 print "<div class=\"page_body\">\n";
5684                 if (@{$co{'comment'}} > 1) {
5685                         print "<div class=\"log\">\n";
5686                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5687                         print "</div>\n"; # class="log"
5688                 }
5689
5690         } elsif ($format eq 'plain') {
5691                 my $refs = git_get_references("tags");
5692                 my $tagname = git_get_rev_name_tags($hash);
5693                 my $filename = basename($project) . "-$hash.patch";
5694
5695                 print $cgi->header(
5696                         -type => 'text/plain',
5697                         -charset => 'utf-8',
5698                         -expires => $expires,
5699                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5700                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5701                 print "From: " . to_utf8($co{'author'}) . "\n";
5702                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5703                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5704
5705                 print "X-Git-Tag: $tagname\n" if $tagname;
5706                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5707
5708                 foreach my $line (@{$co{'comment'}}) {
5709                         print to_utf8($line) . "\n";
5710                 }
5711                 print "---\n\n";
5712         } elsif ($format eq 'patch') {
5713                 my $filename = basename($project) . "-$hash.patch";
5714
5715                 print $cgi->header(
5716                         -type => 'text/plain',
5717                         -charset => 'utf-8',
5718                         -expires => $expires,
5719                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5720         }
5721
5722         # write patch
5723         if ($format eq 'html') {
5724                 my $use_parents = !defined $hash_parent ||
5725                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5726                 git_difftree_body(\@difftree, $hash,
5727                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5728                 print "<br/>\n";
5729
5730                 git_patchset_body($fd, \@difftree, $hash,
5731                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5732                 close $fd;
5733                 print "</div>\n"; # class="page_body"
5734                 git_footer_html();
5735
5736         } elsif ($format eq 'plain') {
5737                 local $/ = undef;
5738                 print <$fd>;
5739                 close $fd
5740                         or print "Reading git-diff-tree failed\n";
5741         } elsif ($format eq 'patch') {
5742                 local $/ = undef;
5743                 print <$fd>;
5744                 close $fd
5745                         or print "Reading git-format-patch failed\n";
5746         }
5747 }
5748
5749 sub git_commitdiff_plain {
5750         git_commitdiff(-format => 'plain');
5751 }
5752
5753 # format-patch-style patches
5754 sub git_patch {
5755         git_commitdiff(-format => 'patch', -single=> 1);
5756 }
5757
5758 sub git_patches {
5759         git_commitdiff(-format => 'patch');
5760 }
5761
5762 sub git_history {
5763         if (!defined $hash_base) {
5764                 $hash_base = git_get_head_hash($project);
5765         }
5766         if (!defined $page) {
5767                 $page = 0;
5768         }
5769         my $ftype;
5770         my %co = parse_commit($hash_base)
5771             or die_error(404, "Unknown commit object");
5772
5773         my $refs = git_get_references();
5774         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5775
5776         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5777                                        $file_name, "--full-history")
5778             or die_error(404, "No such file or directory on given branch");
5779
5780         if (!defined $hash && defined $file_name) {
5781                 # some commits could have deleted file in question,
5782                 # and not have it in tree, but one of them has to have it
5783                 for (my $i = 0; $i <= @commitlist; $i++) {
5784                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5785                         last if defined $hash;
5786                 }
5787         }
5788         if (defined $hash) {
5789                 $ftype = git_get_type($hash);
5790         }
5791         if (!defined $ftype) {
5792                 die_error(500, "Unknown type of object");
5793         }
5794
5795         my $paging_nav = '';
5796         if ($page > 0) {
5797                 $paging_nav .=
5798                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5799                                                file_name=>$file_name)},
5800                                 "first");
5801                 $paging_nav .= " &sdot; " .
5802                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5803                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5804         } else {
5805                 $paging_nav .= "first";
5806                 $paging_nav .= " &sdot; prev";
5807         }
5808         my $next_link = '';
5809         if ($#commitlist >= 100) {
5810                 $next_link =
5811                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5812                                  -accesskey => "n", -title => "Alt-n"}, "next");
5813                 $paging_nav .= " &sdot; $next_link";
5814         } else {
5815                 $paging_nav .= " &sdot; next";
5816         }
5817
5818         git_header_html();
5819         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5820         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5821         git_print_page_path($file_name, $ftype, $hash_base);
5822
5823         git_history_body(\@commitlist, 0, 99,
5824                          $refs, $hash_base, $ftype, $next_link);
5825
5826         git_footer_html();
5827 }
5828
5829 sub git_search {
5830         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5831         if (!defined $searchtext) {
5832                 die_error(400, "Text field is empty");
5833         }
5834         if (!defined $hash) {
5835                 $hash = git_get_head_hash($project);
5836         }
5837         my %co = parse_commit($hash);
5838         if (!%co) {
5839                 die_error(404, "Unknown commit object");
5840         }
5841         if (!defined $page) {
5842                 $page = 0;
5843         }
5844
5845         $searchtype ||= 'commit';
5846         if ($searchtype eq 'pickaxe') {
5847                 # pickaxe may take all resources of your box and run for several minutes
5848                 # with every query - so decide by yourself how public you make this feature
5849                 gitweb_check_feature('pickaxe')
5850                     or die_error(403, "Pickaxe is disabled");
5851         }
5852         if ($searchtype eq 'grep') {
5853                 gitweb_check_feature('grep')
5854                     or die_error(403, "Grep is disabled");
5855         }
5856
5857         git_header_html();
5858
5859         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5860                 my $greptype;
5861                 if ($searchtype eq 'commit') {
5862                         $greptype = "--grep=";
5863                 } elsif ($searchtype eq 'author') {
5864                         $greptype = "--author=";
5865                 } elsif ($searchtype eq 'committer') {
5866                         $greptype = "--committer=";
5867                 }
5868                 $greptype .= $searchtext;
5869                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5870                                                $greptype, '--regexp-ignore-case',
5871                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5872
5873                 my $paging_nav = '';
5874                 if ($page > 0) {
5875                         $paging_nav .=
5876                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5877                                                        searchtext=>$searchtext,
5878                                                        searchtype=>$searchtype)},
5879                                         "first");
5880                         $paging_nav .= " &sdot; " .
5881                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5882                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5883                 } else {
5884                         $paging_nav .= "first";
5885                         $paging_nav .= " &sdot; prev";
5886                 }
5887                 my $next_link = '';
5888                 if ($#commitlist >= 100) {
5889                         $next_link =
5890                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5891                                          -accesskey => "n", -title => "Alt-n"}, "next");
5892                         $paging_nav .= " &sdot; $next_link";
5893                 } else {
5894                         $paging_nav .= " &sdot; next";
5895                 }
5896
5897                 if ($#commitlist >= 100) {
5898                 }
5899
5900                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5901                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5902                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5903         }
5904
5905         if ($searchtype eq 'pickaxe') {
5906                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5907                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5908
5909                 print "<table class=\"pickaxe search\">\n";
5910                 my $alternate = 1;
5911                 local $/ = "\n";
5912                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5913                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5914                         ($search_use_regexp ? '--pickaxe-regex' : ());
5915                 undef %co;
5916                 my @files;
5917                 while (my $line = <$fd>) {
5918                         chomp $line;
5919                         next unless $line;
5920
5921                         my %set = parse_difftree_raw_line($line);
5922                         if (defined $set{'commit'}) {
5923                                 # finish previous commit
5924                                 if (%co) {
5925                                         print "</td>\n" .
5926                                               "<td class=\"link\">" .
5927                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5928                                               " | " .
5929                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5930                                         print "</td>\n" .
5931                                               "</tr>\n";
5932                                 }
5933
5934                                 if ($alternate) {
5935                                         print "<tr class=\"dark\">\n";
5936                                 } else {
5937                                         print "<tr class=\"light\">\n";
5938                                 }
5939                                 $alternate ^= 1;
5940                                 %co = parse_commit($set{'commit'});
5941                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5942                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5943                                       "<td><i>$author</i></td>\n" .
5944                                       "<td>" .
5945                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5946                                               -class => "list subject"},
5947                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5948                         } elsif (defined $set{'to_id'}) {
5949                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5950
5951                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5952                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5953                                               -class => "list"},
5954                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5955                                       "<br/>\n";
5956                         }
5957                 }
5958                 close $fd;
5959
5960                 # finish last commit (warning: repetition!)
5961                 if (%co) {
5962                         print "</td>\n" .
5963                               "<td class=\"link\">" .
5964                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5965                               " | " .
5966                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5967                         print "</td>\n" .
5968                               "</tr>\n";
5969                 }
5970
5971                 print "</table>\n";
5972         }
5973
5974         if ($searchtype eq 'grep') {
5975                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5976                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5977
5978                 print "<table class=\"grep_search\">\n";
5979                 my $alternate = 1;
5980                 my $matches = 0;
5981                 local $/ = "\n";
5982                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5983                         $search_use_regexp ? ('-E', '-i') : '-F',
5984                         $searchtext, $co{'tree'};
5985                 my $lastfile = '';
5986                 while (my $line = <$fd>) {
5987                         chomp $line;
5988                         my ($file, $lno, $ltext, $binary);
5989                         last if ($matches++ > 1000);
5990                         if ($line =~ /^Binary file (.+) matches$/) {
5991                                 $file = $1;
5992                                 $binary = 1;
5993                         } else {
5994                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5995                         }
5996                         if ($file ne $lastfile) {
5997                                 $lastfile and print "</td></tr>\n";
5998                                 if ($alternate++) {
5999                                         print "<tr class=\"dark\">\n";
6000                                 } else {
6001                                         print "<tr class=\"light\">\n";
6002                                 }
6003                                 print "<td class=\"list\">".
6004                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6005                                                                file_name=>"$file"),
6006                                                 -class => "list"}, esc_path($file));
6007                                 print "</td><td>\n";
6008                                 $lastfile = $file;
6009                         }
6010                         if ($binary) {
6011                                 print "<div class=\"binary\">Binary file</div>\n";
6012                         } else {
6013                                 $ltext = untabify($ltext);
6014                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6015                                         $ltext = esc_html($1, -nbsp=>1);
6016                                         $ltext .= '<span class="match">';
6017                                         $ltext .= esc_html($2, -nbsp=>1);
6018                                         $ltext .= '</span>';
6019                                         $ltext .= esc_html($3, -nbsp=>1);
6020                                 } else {
6021                                         $ltext = esc_html($ltext, -nbsp=>1);
6022                                 }
6023                                 print "<div class=\"pre\">" .
6024                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6025                                                                file_name=>"$file").'#l'.$lno,
6026                                                 -class => "linenr"}, sprintf('%4i', $lno))
6027                                         . ' ' .  $ltext . "</div>\n";
6028                         }
6029                 }
6030                 if ($lastfile) {
6031                         print "</td></tr>\n";
6032                         if ($matches > 1000) {
6033                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6034                         }
6035                 } else {
6036                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6037                 }
6038                 close $fd;
6039
6040                 print "</table>\n";
6041         }
6042         git_footer_html();
6043 }
6044
6045 sub git_search_help {
6046         git_header_html();
6047         git_print_page_nav('','', $hash,$hash,$hash);
6048         print <<EOT;
6049 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6050 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6051 the pattern entered is recognized as the POSIX extended
6052 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6053 insensitive).</p>
6054 <dl>
6055 <dt><b>commit</b></dt>
6056 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6057 EOT
6058         my $have_grep = gitweb_check_feature('grep');
6059         if ($have_grep) {
6060                 print <<EOT;
6061 <dt><b>grep</b></dt>
6062 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6063     a different one) are searched for the given pattern. On large trees, this search can take
6064 a while and put some strain on the server, so please use it with some consideration. Note that
6065 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6066 case-sensitive.</dd>
6067 EOT
6068         }
6069         print <<EOT;
6070 <dt><b>author</b></dt>
6071 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6072 <dt><b>committer</b></dt>
6073 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6074 EOT
6075         my $have_pickaxe = gitweb_check_feature('pickaxe');
6076         if ($have_pickaxe) {
6077                 print <<EOT;
6078 <dt><b>pickaxe</b></dt>
6079 <dd>All commits that caused the string to appear or disappear from any file (changes that
6080 added, removed or "modified" the string) will be listed. This search can take a while and
6081 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6082 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6083 EOT
6084         }
6085         print "</dl>\n";
6086         git_footer_html();
6087 }
6088
6089 sub git_shortlog {
6090         my $head = git_get_head_hash($project);
6091         if (!defined $hash) {
6092                 $hash = $head;
6093         }
6094         if (!defined $page) {
6095                 $page = 0;
6096         }
6097         my $refs = git_get_references();
6098
6099         my $commit_hash = $hash;
6100         if (defined $hash_parent) {
6101                 $commit_hash = "$hash_parent..$hash";
6102         }
6103         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
6104
6105         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
6106         my $next_link = '';
6107         if ($#commitlist >= 100) {
6108                 $next_link =
6109                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6110                                  -accesskey => "n", -title => "Alt-n"}, "next");
6111         }
6112         my $patch_max = gitweb_check_feature('patches');
6113         if ($patch_max) {
6114                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6115                         $paging_nav .= " &sdot; " .
6116                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6117                                         "patches");
6118                 }
6119         }
6120
6121         git_header_html();
6122         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
6123         git_print_header_div('summary', $project);
6124
6125         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
6126
6127         git_footer_html();
6128 }
6129
6130 ## ......................................................................
6131 ## feeds (RSS, Atom; OPML)
6132
6133 sub git_feed {
6134         my $format = shift || 'atom';
6135         my $have_blame = gitweb_check_feature('blame');
6136
6137         # Atom: http://www.atomenabled.org/developers/syndication/
6138         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6139         if ($format ne 'rss' && $format ne 'atom') {
6140                 die_error(400, "Unknown web feed format");
6141         }
6142
6143         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6144         my $head = $hash || 'HEAD';
6145         my @commitlist = parse_commits($head, 150, 0, $file_name);
6146
6147         my %latest_commit;
6148         my %latest_date;
6149         my $content_type = "application/$format+xml";
6150         if (defined $cgi->http('HTTP_ACCEPT') &&
6151                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6152                 # browser (feed reader) prefers text/xml
6153                 $content_type = 'text/xml';
6154         }
6155         if (defined($commitlist[0])) {
6156                 %latest_commit = %{$commitlist[0]};
6157                 my $latest_epoch = $latest_commit{'committer_epoch'};
6158                 %latest_date   = parse_date($latest_epoch);
6159                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6160                 if (defined $if_modified) {
6161                         my $since;
6162                         if (eval { require HTTP::Date; 1; }) {
6163                                 $since = HTTP::Date::str2time($if_modified);
6164                         } elsif (eval { require Time::ParseDate; 1; }) {
6165                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6166                         }
6167                         if (defined $since && $latest_epoch <= $since) {
6168                                 print $cgi->header(
6169                                         -type => $content_type,
6170                                         -charset => 'utf-8',
6171                                         -last_modified => $latest_date{'rfc2822'},
6172                                         -status => '304 Not Modified');
6173                                 return;
6174                         }
6175                 }
6176                 print $cgi->header(
6177                         -type => $content_type,
6178                         -charset => 'utf-8',
6179                         -last_modified => $latest_date{'rfc2822'});
6180         } else {
6181                 print $cgi->header(
6182                         -type => $content_type,
6183                         -charset => 'utf-8');
6184         }
6185
6186         # Optimization: skip generating the body if client asks only
6187         # for Last-Modified date.
6188         return if ($cgi->request_method() eq 'HEAD');
6189
6190         # header variables
6191         my $title = "$site_name - $project/$action";
6192         my $feed_type = 'log';
6193         if (defined $hash) {
6194                 $title .= " - '$hash'";
6195                 $feed_type = 'branch log';
6196                 if (defined $file_name) {
6197                         $title .= " :: $file_name";
6198                         $feed_type = 'history';
6199                 }
6200         } elsif (defined $file_name) {
6201                 $title .= " - $file_name";
6202                 $feed_type = 'history';
6203         }
6204         $title .= " $feed_type";
6205         my $descr = git_get_project_description($project);
6206         if (defined $descr) {
6207                 $descr = esc_html($descr);
6208         } else {
6209                 $descr = "$project " .
6210                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6211                          " feed";
6212         }
6213         my $owner = git_get_project_owner($project);
6214         $owner = esc_html($owner);
6215
6216         #header
6217         my $alt_url;
6218         if (defined $file_name) {
6219                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6220         } elsif (defined $hash) {
6221                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6222         } else {
6223                 $alt_url = href(-full=>1, action=>"summary");
6224         }
6225         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6226         if ($format eq 'rss') {
6227                 print <<XML;
6228 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6229 <channel>
6230 XML
6231                 print "<title>$title</title>\n" .
6232                       "<link>$alt_url</link>\n" .
6233                       "<description>$descr</description>\n" .
6234                       "<language>en</language>\n" .
6235                       # project owner is responsible for 'editorial' content
6236                       "<managingEditor>$owner</managingEditor>\n";
6237                 if (defined $logo || defined $favicon) {
6238                         # prefer the logo to the favicon, since RSS
6239                         # doesn't allow both
6240                         my $img = esc_url($logo || $favicon);
6241                         print "<image>\n" .
6242                               "<url>$img</url>\n" .
6243                               "<title>$title</title>\n" .
6244                               "<link>$alt_url</link>\n" .
6245                               "</image>\n";
6246                 }
6247                 if (%latest_date) {
6248                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6249                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6250                 }
6251                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6252         } elsif ($format eq 'atom') {
6253                 print <<XML;
6254 <feed xmlns="http://www.w3.org/2005/Atom">
6255 XML
6256                 print "<title>$title</title>\n" .
6257                       "<subtitle>$descr</subtitle>\n" .
6258                       '<link rel="alternate" type="text/html" href="' .
6259                       $alt_url . '" />' . "\n" .
6260                       '<link rel="self" type="' . $content_type . '" href="' .
6261                       $cgi->self_url() . '" />' . "\n" .
6262                       "<id>" . href(-full=>1) . "</id>\n" .
6263                       # use project owner for feed author
6264                       "<author><name>$owner</name></author>\n";
6265                 if (defined $favicon) {
6266                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6267                 }
6268                 if (defined $logo_url) {
6269                         # not twice as wide as tall: 72 x 27 pixels
6270                         print "<logo>" . esc_url($logo) . "</logo>\n";
6271                 }
6272                 if (! %latest_date) {
6273                         # dummy date to keep the feed valid until commits trickle in:
6274                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6275                 } else {
6276                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6277                 }
6278                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6279         }
6280
6281         # contents
6282         for (my $i = 0; $i <= $#commitlist; $i++) {
6283                 my %co = %{$commitlist[$i]};
6284                 my $commit = $co{'id'};
6285                 # we read 150, we always show 30 and the ones more recent than 48 hours
6286                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6287                         last;
6288                 }
6289                 my %cd = parse_date($co{'author_epoch'});
6290
6291                 # get list of changed files
6292                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6293                         $co{'parent'} || "--root",
6294                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6295                         or next;
6296                 my @difftree = map { chomp; $_ } <$fd>;
6297                 close $fd
6298                         or next;
6299
6300                 # print element (entry, item)
6301                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6302                 if ($format eq 'rss') {
6303                         print "<item>\n" .
6304                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6305                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6306                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6307                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6308                               "<link>$co_url</link>\n" .
6309                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6310                               "<content:encoded>" .
6311                               "<![CDATA[\n";
6312                 } elsif ($format eq 'atom') {
6313                         print "<entry>\n" .
6314                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6315                               "<updated>$cd{'iso-8601'}</updated>\n" .
6316                               "<author>\n" .
6317                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6318                         if ($co{'author_email'}) {
6319                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6320                         }
6321                         print "</author>\n" .
6322                               # use committer for contributor
6323                               "<contributor>\n" .
6324                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6325                         if ($co{'committer_email'}) {
6326                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6327                         }
6328                         print "</contributor>\n" .
6329                               "<published>$cd{'iso-8601'}</published>\n" .
6330                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6331                               "<id>$co_url</id>\n" .
6332                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6333                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6334                 }
6335                 my $comment = $co{'comment'};
6336                 print "<pre>\n";
6337                 foreach my $line (@$comment) {
6338                         $line = esc_html($line);
6339                         print "$line\n";
6340                 }
6341                 print "</pre><ul>\n";
6342                 foreach my $difftree_line (@difftree) {
6343                         my %difftree = parse_difftree_raw_line($difftree_line);
6344                         next if !$difftree{'from_id'};
6345
6346                         my $file = $difftree{'file'} || $difftree{'to_file'};
6347
6348                         print "<li>" .
6349                               "[" .
6350                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6351                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6352                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6353                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6354                                       -title => "diff"}, 'D');
6355                         if ($have_blame) {
6356                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6357                                                              file_name=>$file, hash_base=>$commit),
6358                                               -title => "blame"}, 'B');
6359                         }
6360                         # if this is not a feed of a file history
6361                         if (!defined $file_name || $file_name ne $file) {
6362                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6363                                                              file_name=>$file, hash=>$commit),
6364                                               -title => "history"}, 'H');
6365                         }
6366                         $file = esc_path($file);
6367                         print "] ".
6368                               "$file</li>\n";
6369                 }
6370                 if ($format eq 'rss') {
6371                         print "</ul>]]>\n" .
6372                               "</content:encoded>\n" .
6373                               "</item>\n";
6374                 } elsif ($format eq 'atom') {
6375                         print "</ul>\n</div>\n" .
6376                               "</content>\n" .
6377                               "</entry>\n";
6378                 }
6379         }
6380
6381         # end of feed
6382         if ($format eq 'rss') {
6383                 print "</channel>\n</rss>\n";
6384         } elsif ($format eq 'atom') {
6385                 print "</feed>\n";
6386         }
6387 }
6388
6389 sub git_rss {
6390         git_feed('rss');
6391 }
6392
6393 sub git_atom {
6394         git_feed('atom');
6395 }
6396
6397 sub git_opml {
6398         my @list = git_get_projects_list();
6399
6400         print $cgi->header(
6401                 -type => 'text/xml',
6402                 -charset => 'utf-8',
6403                 -content_disposition => 'inline; filename="opml.xml"');
6404
6405         print <<XML;
6406 <?xml version="1.0" encoding="utf-8"?>
6407 <opml version="1.0">
6408 <head>
6409   <title>$site_name OPML Export</title>
6410 </head>
6411 <body>
6412 <outline text="git RSS feeds">
6413 XML
6414
6415         foreach my $pr (@list) {
6416                 my %proj = %$pr;
6417                 my $head = git_get_head_hash($proj{'path'});
6418                 if (!defined $head) {
6419                         next;
6420                 }
6421                 $git_dir = "$projectroot/$proj{'path'}";
6422                 my %co = parse_commit($head);
6423                 if (!%co) {
6424                         next;
6425                 }
6426
6427                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6428                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6429                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6430                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6431         }
6432         print <<XML;
6433 </outline>
6434 </body>
6435 </opml>
6436 XML
6437 }