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

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use 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
  90 # URI of GIT logo (72x27 size)
  91 our $logo = "++GITWEB_LOGO++";
  92 # URI of GIT favicon, assumed to be image/png type
  93 our $favicon = "++GITWEB_FAVICON++";
  94
  95 # URI and label (title) of GIT logo link
  96 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  97 #our $logo_label = "git documentation";
  98 our $logo_url = "http://git.or.cz/";
  99 our $logo_label = "git homepage";
 100
 101 # source of projects list
 102 our $projects_list = "++GITWEB_LIST++";
 103
 104 # the width (in characters) of the projects list "Description" column
 105 our $projects_list_description_width = 25;
 106
 107 # default order of projects list
 108 # valid values are none, project, descr, owner, and age
 109 our $default_projects_order = "project";
 110
 111 # show repository only if this file exists
 112 # (only effective if this variable evaluates to true)
 113 our $export_ok = "++GITWEB_EXPORT_OK++";
 114
 115 # show repository only if this subroutine returns true
 116 # when given the path to the project, for example:
 117 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 118 our $export_auth_hook = undef;
 119
 120 # only allow viewing of repositories also shown on the overview page
 121 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 122
 123 # list of git base URLs used for URL to where fetch project from,
 124 # i.e. full URL is "$git_base_url/$project"
 125 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 126
 127 # default blob_plain mimetype and default charset for text/plain blob
 128 our $default_blob_plain_mimetype = 'text/plain';
 129 our $default_text_plain_charset  = undef;
 130
 131 # file to use for guessing MIME types before trying /etc/mime.types
 132 # (relative to the current git repository)
 133 our $mimetypes_file = undef;
 134
 135 # assume this charset if line contains non-UTF-8 characters;
 136 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 137 # for which encoding all byte sequences are valid, for example
 138 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 139 # could be even 'utf-8' for the old behavior)
 140 our $fallback_encoding = 'latin1';
 141
 142 # rename detection options for git-diff and git-diff-tree
 143 # - default is '-M', with the cost proportional to
 144 #   (number of removed files) * (number of new files).
 145 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 146 #   (number of changed files + number of removed files) * (number of new files)
 147 # - even more costly is '-C', '--find-copies-harder' with cost
 148 #   (number of files in the original tree) * (number of new files)
 149 # - one might want to include '-B' option, e.g. '-B', '-M'
 150 our @diff_opts = ('-M'); # taken from git_commit
 151
 152 # Disables features that would allow repository owners to inject script into
 153 # the gitweb domain.
 154 our $prevent_xss = 0;
 155
 156 # information about snapshot formats that gitweb is capable of serving
 157 our %known_snapshot_formats = (
 158         # name => {
 159         #       'display' => display name,
 160         #       'type' => mime type,
 161         #       'suffix' => filename suffix,
 162         #       'format' => --format for git-archive,
 163         #       'compressor' => [compressor command and arguments]
 164         #                       (array reference, optional)}
 165         #
 166         'tgz' => {
 167                 'display' => 'tar.gz',
 168                 'type' => 'application/x-gzip',
 169                 'suffix' => '.tar.gz',
 170                 'format' => 'tar',
 171                 'compressor' => ['gzip']},
 172
 173         'tbz2' => {
 174                 'display' => 'tar.bz2',
 175                 'type' => 'application/x-bzip2',
 176                 'suffix' => '.tar.bz2',
 177                 'format' => 'tar',
 178                 'compressor' => ['bzip2']},
 179
 180         'zip' => {
 181                 'display' => 'zip',
 182                 'type' => 'application/x-zip',
 183                 'suffix' => '.zip',
 184                 'format' => 'zip'},
 185 );
 186
 187 # Aliases so we understand old gitweb.snapshot values in repository
 188 # configuration.
 189 our %known_snapshot_format_aliases = (
 190         'gzip'  => 'tgz',
 191         'bzip2' => 'tbz2',
 192
 193         # backward compatibility: legacy gitweb config support
 194         'x-gzip' => undef, 'gz' => undef,
 195         'x-bzip2' => undef, 'bz2' => undef,
 196         'x-zip' => undef, '' => undef,
 197 );
 198
 199 # You define site-wide feature defaults here; override them with
 200 # $GITWEB_CONFIG as necessary.
 201 our %feature = (
 202         # feature => {
 203         #       'sub' => feature-sub (subroutine),
 204         #       'override' => allow-override (boolean),
 205         #       'default' => [ default options...] (array reference)}
 206         #
 207         # if feature is overridable (it means that allow-override has true value),
 208         # then feature-sub will be called with default options as parameters;
 209         # return value of feature-sub indicates if to enable specified feature
 210         #
 211         # if there is no 'sub' key (no feature-sub), then feature cannot be
 212         # overriden
 213         #
 214         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 215         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 216         # is enabled
 217
 218         # Enable the 'blame' blob view, showing the last commit that modified
 219         # each line in the file. This can be very CPU-intensive.
 220
 221         # To enable system wide have in $GITWEB_CONFIG
 222         # $feature{'blame'}{'default'} = [1];
 223         # To have project specific config enable override in $GITWEB_CONFIG
 224         # $feature{'blame'}{'override'} = 1;
 225         # and in project config gitweb.blame = 0|1;
 226         'blame' => {
 227                 'sub' => sub { feature_bool('blame', @_) },
 228                 'override' => 0,
 229                 'default' => [0]},
 230
 231         # Enable the 'snapshot' link, providing a compressed archive of any
 232         # tree. This can potentially generate high traffic if you have large
 233         # project.
 234
 235         # Value is a list of formats defined in %known_snapshot_formats that
 236         # you wish to offer.
 237         # To disable system wide have in $GITWEB_CONFIG
 238         # $feature{'snapshot'}{'default'} = [];
 239         # To have project specific config enable override in $GITWEB_CONFIG
 240         # $feature{'snapshot'}{'override'} = 1;
 241         # and in project config, a comma-separated list of formats or "none"
 242         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 243         'snapshot' => {
 244                 'sub' => \&feature_snapshot,
 245                 'override' => 0,
 246                 'default' => ['tgz']},
 247
 248         # Enable text search, which will list the commits which match author,
 249         # committer or commit text to a given string.  Enabled by default.
 250         # Project specific override is not supported.
 251         'search' => {
 252                 'override' => 0,
 253                 'default' => [1]},
 254
 255         # Enable grep search, which will list the files in currently selected
 256         # tree containing the given string. Enabled by default. This can be
 257         # potentially CPU-intensive, of course.
 258
 259         # To enable system wide have in $GITWEB_CONFIG
 260         # $feature{'grep'}{'default'} = [1];
 261         # To have project specific config enable override in $GITWEB_CONFIG
 262         # $feature{'grep'}{'override'} = 1;
 263         # and in project config gitweb.grep = 0|1;
 264         'grep' => {
 265                 'sub' => sub { feature_bool('grep', @_) },
 266                 'override' => 0,
 267                 'default' => [1]},
 268
 269         # Enable the pickaxe search, which will list the commits that modified
 270         # a given string in a file. This can be practical and quite faster
 271         # alternative to 'blame', but still potentially CPU-intensive.
 272
 273         # To enable system wide have in $GITWEB_CONFIG
 274         # $feature{'pickaxe'}{'default'} = [1];
 275         # To have project specific config enable override in $GITWEB_CONFIG
 276         # $feature{'pickaxe'}{'override'} = 1;
 277         # and in project config gitweb.pickaxe = 0|1;
 278         'pickaxe' => {
 279                 'sub' => sub { feature_bool('pickaxe', @_) },
 280                 'override' => 0,
 281                 'default' => [1]},
 282
 283         # Make gitweb use an alternative format of the URLs which can be
 284         # more readable and natural-looking: project name is embedded
 285         # directly in the path and the query string contains other
 286         # auxiliary information. All gitweb installations recognize
 287         # URL in either format; this configures in which formats gitweb
 288         # generates links.
 289
 290         # To enable system wide have in $GITWEB_CONFIG
 291         # $feature{'pathinfo'}{'default'} = [1];
 292         # Project specific override is not supported.
 293
 294         # Note that you will need to change the default location of CSS,
 295         # favicon, logo and possibly other files to an absolute URL. Also,
 296         # if gitweb.cgi serves as your indexfile, you will need to force
 297         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 298         'pathinfo' => {
 299                 'override' => 0,
 300                 'default' => [0]},
 301
 302         # Make gitweb consider projects in project root subdirectories
 303         # to be forks of existing projects. Given project $projname.git,
 304         # projects matching $projname/*.git will not be shown in the main
 305         # projects list, instead a '+' mark will be added to $projname
 306         # there and a 'forks' view will be enabled for the project, listing
 307         # all the forks. If project list is taken from a file, forks have
 308         # to be listed after the main project.
 309
 310         # To enable system wide have in $GITWEB_CONFIG
 311         # $feature{'forks'}{'default'} = [1];
 312         # Project specific override is not supported.
 313         'forks' => {
 314                 'override' => 0,
 315                 'default' => [0]},
 316
 317         # Insert custom links to the action bar of all project pages.
 318         # This enables you mainly to link to third-party scripts integrating
 319         # into gitweb; e.g. git-browser for graphical history representation
 320         # or custom web-based repository administration interface.
 321
 322         # The 'default' value consists of a list of triplets in the form
 323         # (label, link, position) where position is the label after which
 324         # to insert the link and link is a format string where %n expands
 325         # to the project name, %f to the project path within the filesystem,
 326         # %h to the current hash (h gitweb parameter) and %b to the current
 327         # hash base (hb gitweb parameter); %% expands to %.
 328
 329         # To enable system wide have in $GITWEB_CONFIG e.g.
 330         # $feature{'actions'}{'default'} = [('graphiclog',
 331         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 332         # Project specific override is not supported.
 333         'actions' => {
 334                 'override' => 0,
 335                 'default' => []},
 336
 337         # Allow gitweb scan project content tags described in ctags/
 338         # of project repository, and display the popular Web 2.0-ish
 339         # "tag cloud" near the project list. Note that this is something
 340         # COMPLETELY different from the normal Git tags.
 341
 342         # gitweb by itself can show existing tags, but it does not handle
 343         # tagging itself; you need an external application for that.
 344         # For an example script, check Girocco's cgi/tagproj.cgi.
 345         # You may want to install the HTML::TagCloud Perl module to get
 346         # a pretty tag cloud instead of just a list of tags.
 347
 348         # To enable system wide have in $GITWEB_CONFIG
 349         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 350         # Project specific override is not supported.
 351         'ctags' => {
 352                 'override' => 0,
 353                 'default' => [0]},
 354
 355         # The maximum number of patches in a patchset generated in patch
 356         # view. Set this to 0 or undef to disable patch view, or to a
 357         # negative number to remove any limit.
 358
 359         # To disable system wide have in $GITWEB_CONFIG
 360         # $feature{'patches'}{'default'} = [0];
 361         # To have project specific config enable override in $GITWEB_CONFIG
 362         # $feature{'patches'}{'override'} = 1;
 363         # and in project config gitweb.patches = 0|n;
 364         # where n is the maximum number of patches allowed in a patchset.
 365         'patches' => {
 366                 'sub' => \&feature_patches,
 367                 'override' => 0,
 368                 'default' => [16]},
 369 );
 370
 371 sub gitweb_get_feature {
 372         my ($name) = @_;
 373         return unless exists $feature{$name};
 374         my ($sub, $override, @defaults) = (
 375                 $feature{$name}{'sub'},
 376                 $feature{$name}{'override'},
 377                 @{$feature{$name}{'default'}});
 378         if (!$override) { return @defaults; }
 379         if (!defined $sub) {
 380                 warn "feature $name is not overrideable";
 381                 return @defaults;
 382         }
 383         return $sub->(@defaults);
 384 }
 385
 386 # A wrapper to check if a given feature is enabled.
 387 # With this, you can say
 388 #
 389 #   my $bool_feat = gitweb_check_feature('bool_feat');
 390 #   gitweb_check_feature('bool_feat') or somecode;
 391 #
 392 # instead of
 393 #
 394 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 395 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 396 #
 397 sub gitweb_check_feature {
 398         return (gitweb_get_feature(@_))[0];
 399 }
 400
 401
 402 sub feature_bool {
 403         my $key = shift;
 404         my ($val) = git_get_project_config($key, '--bool');
 405
 406         if (!defined $val) {
 407                 return ($_[0]);
 408         } elsif ($val eq 'true') {
 409                 return (1);
 410         } elsif ($val eq 'false') {
 411                 return (0);
 412         }
 413 }
 414
 415 sub feature_snapshot {
 416         my (@fmts) = @_;
 417
 418         my ($val) = git_get_project_config('snapshot');
 419
 420         if ($val) {
 421                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 422         }
 423
 424         return @fmts;
 425 }
 426
 427 sub feature_patches {
 428         my @val = (git_get_project_config('patches', '--int'));
 429
 430         if (@val) {
 431                 return @val;
 432         }
 433
 434         return ($_[0]);
 435 }
 436
 437 # checking HEAD file with -e is fragile if the repository was
 438 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 439 # and then pruned.
 440 sub check_head_link {
 441         my ($dir) = @_;
 442         my $headfile = "$dir/HEAD";
 443         return ((-e $headfile) ||
 444                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 445 }
 446
 447 sub check_export_ok {
 448         my ($dir) = @_;
 449         return (check_head_link($dir) &&
 450                 (!$export_ok || -e "$dir/$export_ok") &&
 451                 (!$export_auth_hook || $export_auth_hook->($dir)));
 452 }
 453
 454 # process alternate names for backward compatibility
 455 # filter out unsupported (unknown) snapshot formats
 456 sub filter_snapshot_fmts {
 457         my @fmts = @_;
 458
 459         @fmts = map {
 460                 exists $known_snapshot_format_aliases{$_} ?
 461                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 462         @fmts = grep {
 463                 exists $known_snapshot_formats{$_} } @fmts;
 464 }
 465
 466 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 467 if (-e $GITWEB_CONFIG) {
 468         do $GITWEB_CONFIG;
 469 } else {
 470         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 471         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 472 }
 473
 474 # version of the core git binary
 475 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 476
 477 $projects_list ||= $projectroot;
 478
 479 # ======================================================================
 480 # input validation and dispatch
 481
 482 # input parameters can be collected from a variety of sources (presently, CGI
 483 # and PATH_INFO), so we define an %input_params hash that collects them all
 484 # together during validation: this allows subsequent uses (e.g. href()) to be
 485 # agnostic of the parameter origin
 486
 487 our %input_params = ();
 488
 489 # input parameters are stored with the long parameter name as key. This will
 490 # also be used in the href subroutine to convert parameters to their CGI
 491 # equivalent, and since the href() usage is the most frequent one, we store
 492 # the name -> CGI key mapping here, instead of the reverse.
 493 #
 494 # XXX: Warning: If you touch this, check the search form for updating,
 495 # too.
 496
 497 our @cgi_param_mapping = (
 498         project => "p",
 499         action => "a",
 500         file_name => "f",
 501         file_parent => "fp",
 502         hash => "h",
 503         hash_parent => "hp",
 504         hash_base => "hb",
 505         hash_parent_base => "hpb",
 506         page => "pg",
 507         order => "o",
 508         searchtext => "s",
 509         searchtype => "st",
 510         snapshot_format => "sf",
 511         extra_options => "opt",
 512         search_use_regexp => "sr",
 513 );
 514 our %cgi_param_mapping = @cgi_param_mapping;
 515
 516 # we will also need to know the possible actions, for validation
 517 our %actions = (
 518         "blame" => \&git_blame,
 519         "blobdiff" => \&git_blobdiff,
 520         "blobdiff_plain" => \&git_blobdiff_plain,
 521         "blob" => \&git_blob,
 522         "blob_plain" => \&git_blob_plain,
 523         "commitdiff" => \&git_commitdiff,
 524         "commitdiff_plain" => \&git_commitdiff_plain,
 525         "commit" => \&git_commit,
 526         "forks" => \&git_forks,
 527         "heads" => \&git_heads,
 528         "history" => \&git_history,
 529         "log" => \&git_log,
 530         "patch" => \&git_patch,
 531         "patches" => \&git_patches,
 532         "rss" => \&git_rss,
 533         "atom" => \&git_atom,
 534         "search" => \&git_search,
 535         "search_help" => \&git_search_help,
 536         "shortlog" => \&git_shortlog,
 537         "summary" => \&git_summary,
 538         "tag" => \&git_tag,
 539         "tags" => \&git_tags,
 540         "tree" => \&git_tree,
 541         "snapshot" => \&git_snapshot,
 542         "object" => \&git_object,
 543         # those below don't need $project
 544         "opml" => \&git_opml,
 545         "project_list" => \&git_project_list,
 546         "project_index" => \&git_project_index,
 547 );
 548
 549 # finally, we have the hash of allowed extra_options for the commands that
 550 # allow them
 551 our %allowed_options = (
 552         "--no-merges" => [ qw(rss atom log shortlog history) ],
 553 );
 554
 555 # fill %input_params with the CGI parameters. All values except for 'opt'
 556 # should be single values, but opt can be an array. We should probably
 557 # build an array of parameters that can be multi-valued, but since for the time
 558 # being it's only this one, we just single it out
 559 while (my ($name, $symbol) = each %cgi_param_mapping) {
 560         if ($symbol eq 'opt') {
 561                 $input_params{$name} = [ $cgi->param($symbol) ];
 562         } else {
 563                 $input_params{$name} = $cgi->param($symbol);
 564         }
 565 }
 566
 567 # now read PATH_INFO and update the parameter list for missing parameters
 568 sub evaluate_path_info {
 569         return if defined $input_params{'project'};
 570         return if !$path_info;
 571         $path_info =~ s,^/+,,;
 572         return if !$path_info;
 573
 574         # find which part of PATH_INFO is project
 575         my $project = $path_info;
 576         $project =~ s,/+$,,;
 577         while ($project && !check_head_link("$projectroot/$project")) {
 578                 $project =~ s,/*[^/]*$,,;
 579         }
 580         return unless $project;
 581         $input_params{'project'} = $project;
 582
 583         # do not change any parameters if an action is given using the query string
 584         return if $input_params{'action'};
 585         $path_info =~ s,^\Q$project\E/*,,;
 586
 587         # next, check if we have an action
 588         my $action = $path_info;
 589         $action =~ s,/.*$,,;
 590         if (exists $actions{$action}) {
 591                 $path_info =~ s,^$action/*,,;
 592                 $input_params{'action'} = $action;
 593         }
 594
 595         # list of actions that want hash_base instead of hash, but can have no
 596         # pathname (f) parameter
 597         my @wants_base = (
 598                 'tree',
 599                 'history',
 600         );
 601
 602         # we want to catch
 603         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 604         my ($parentrefname, $parentpathname, $refname, $pathname) =
 605                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 606
 607         # first, analyze the 'current' part
 608         if (defined $pathname) {
 609                 # we got "branch:filename" or "branch:dir/"
 610                 # we could use git_get_type(branch:pathname), but:
 611                 # - it needs $git_dir
 612                 # - it does a git() call
 613                 # - the convention of terminating directories with a slash
 614                 #   makes it superfluous
 615                 # - embedding the action in the PATH_INFO would make it even
 616                 #   more superfluous
 617                 $pathname =~ s,^/+,,;
 618                 if (!$pathname || substr($pathname, -1) eq "/") {
 619                         $input_params{'action'} ||= "tree";
 620                         $pathname =~ s,/$,,;
 621                 } else {
 622                         # the default action depends on whether we had parent info
 623                         # or not
 624                         if ($parentrefname) {
 625                                 $input_params{'action'} ||= "blobdiff_plain";
 626                         } else {
 627                                 $input_params{'action'} ||= "blob_plain";
 628                         }
 629                 }
 630                 $input_params{'hash_base'} ||= $refname;
 631                 $input_params{'file_name'} ||= $pathname;
 632         } elsif (defined $refname) {
 633                 # we got "branch". In this case we have to choose if we have to
 634                 # set hash or hash_base.
 635                 #
 636                 # Most of the actions without a pathname only want hash to be
 637                 # set, except for the ones specified in @wants_base that want
 638                 # hash_base instead. It should also be noted that hand-crafted
 639                 # links having 'history' as an action and no pathname or hash
 640                 # set will fail, but that happens regardless of PATH_INFO.
 641                 $input_params{'action'} ||= "shortlog";
 642                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 643                         $input_params{'hash_base'} ||= $refname;
 644                 } else {
 645                         $input_params{'hash'} ||= $refname;
 646                 }
 647         }
 648
 649         # next, handle the 'parent' part, if present
 650         if (defined $parentrefname) {
 651                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 652                 # someproject/blobdiff/oldrev..newrev:/filename
 653                 if ($parentpathname) {
 654                         $parentpathname =~ s,^/+,,;
 655                         $parentpathname =~ s,/$,,;
 656                         $input_params{'file_parent'} ||= $parentpathname;
 657                 } else {
 658                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 659                 }
 660                 # we assume that hash_parent_base is wanted if a path was specified,
 661                 # or if the action wants hash_base instead of hash
 662                 if (defined $input_params{'file_parent'} ||
 663                         grep { $_ eq $input_params{'action'} } @wants_base) {
 664                         $input_params{'hash_parent_base'} ||= $parentrefname;
 665                 } else {
 666                         $input_params{'hash_parent'} ||= $parentrefname;
 667                 }
 668         }
 669
 670         # for the snapshot action, we allow URLs in the form
 671         # $project/snapshot/$hash.ext
 672         # where .ext determines the snapshot and gets removed from the
 673         # passed $refname to provide the $hash.
 674         #
 675         # To be able to tell that $refname includes the format extension, we
 676         # require the following two conditions to be satisfied:
 677         # - the hash input parameter MUST have been set from the $refname part
 678         #   of the URL (i.e. they must be equal)
 679         # - the snapshot format MUST NOT have been defined already (e.g. from
 680         #   CGI parameter sf)
 681         # It's also useless to try any matching unless $refname has a dot,
 682         # so we check for that too
 683         if (defined $input_params{'action'} &&
 684                 $input_params{'action'} eq 'snapshot' &&
 685                 defined $refname && index($refname, '.') != -1 &&
 686                 $refname eq $input_params{'hash'} &&
 687                 !defined $input_params{'snapshot_format'}) {
 688                 # We loop over the known snapshot formats, checking for
 689                 # extensions. Allowed extensions are both the defined suffix
 690                 # (which includes the initial dot already) and the snapshot
 691                 # format key itself, with a prepended dot
 692                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 693                         my $hash = $refname;
 694                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 695                                 next;
 696                         }
 697                         my $sfx = $1;
 698                         # a valid suffix was found, so set the snapshot format
 699                         # and reset the hash parameter
 700                         $input_params{'snapshot_format'} = $fmt;
 701                         $input_params{'hash'} = $hash;
 702                         # we also set the format suffix to the one requested
 703                         # in the URL: this way a request for e.g. .tgz returns
 704                         # a .tgz instead of a .tar.gz
 705                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 706                         last;
 707                 }
 708         }
 709 }
 710 evaluate_path_info();
 711
 712 our $action = $input_params{'action'};
 713 if (defined $action) {
 714         if (!validate_action($action)) {
 715                 die_error(400, "Invalid action parameter");
 716         }
 717 }
 718
 719 # parameters which are pathnames
 720 our $project = $input_params{'project'};
 721 if (defined $project) {
 722         if (!validate_project($project)) {
 723                 undef $project;
 724                 die_error(404, "No such project");
 725         }
 726 }
 727
 728 our $file_name = $input_params{'file_name'};
 729 if (defined $file_name) {
 730         if (!validate_pathname($file_name)) {
 731                 die_error(400, "Invalid file parameter");
 732         }
 733 }
 734
 735 our $file_parent = $input_params{'file_parent'};
 736 if (defined $file_parent) {
 737         if (!validate_pathname($file_parent)) {
 738                 die_error(400, "Invalid file parent parameter");
 739         }
 740 }
 741
 742 # parameters which are refnames
 743 our $hash = $input_params{'hash'};
 744 if (defined $hash) {
 745         if (!validate_refname($hash)) {
 746                 die_error(400, "Invalid hash parameter");
 747         }
 748 }
 749
 750 our $hash_parent = $input_params{'hash_parent'};
 751 if (defined $hash_parent) {
 752         if (!validate_refname($hash_parent)) {
 753                 die_error(400, "Invalid hash parent parameter");
 754         }
 755 }
 756
 757 our $hash_base = $input_params{'hash_base'};
 758 if (defined $hash_base) {
 759         if (!validate_refname($hash_base)) {
 760                 die_error(400, "Invalid hash base parameter");
 761         }
 762 }
 763
 764 our @extra_options = @{$input_params{'extra_options'}};
 765 # @extra_options is always defined, since it can only be (currently) set from
 766 # CGI, and $cgi->param() returns the empty array in array context if the param
 767 # is not set
 768 foreach my $opt (@extra_options) {
 769         if (not exists $allowed_options{$opt}) {
 770                 die_error(400, "Invalid option parameter");
 771         }
 772         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 773                 die_error(400, "Invalid option parameter for this action");
 774         }
 775 }
 776
 777 our $hash_parent_base = $input_params{'hash_parent_base'};
 778 if (defined $hash_parent_base) {
 779         if (!validate_refname($hash_parent_base)) {
 780                 die_error(400, "Invalid hash parent base parameter");
 781         }
 782 }
 783
 784 # other parameters
 785 our $page = $input_params{'page'};
 786 if (defined $page) {
 787         if ($page =~ m/[^0-9]/) {
 788                 die_error(400, "Invalid page parameter");
 789         }
 790 }
 791
 792 our $searchtype = $input_params{'searchtype'};
 793 if (defined $searchtype) {
 794         if ($searchtype =~ m/[^a-z]/) {
 795                 die_error(400, "Invalid searchtype parameter");
 796         }
 797 }
 798
 799 our $search_use_regexp = $input_params{'search_use_regexp'};
 800
 801 our $searchtext = $input_params{'searchtext'};
 802 our $search_regexp;
 803 if (defined $searchtext) {
 804         if (length($searchtext) < 2) {
 805                 die_error(403, "At least two characters are required for search parameter");
 806         }
 807         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 808 }
 809
 810 # path to the current git repository
 811 our $git_dir;
 812 $git_dir = "$projectroot/$project" if $project;
 813
 814 # list of supported snapshot formats
 815 our @snapshot_fmts = gitweb_get_feature('snapshot');
 816 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 817
 818 # dispatch
 819 if (!defined $action) {
 820         if (defined $hash) {
 821                 $action = git_get_type($hash);
 822         } elsif (defined $hash_base && defined $file_name) {
 823                 $action = git_get_type("$hash_base:$file_name");
 824         } elsif (defined $project) {
 825                 $action = 'summary';
 826         } else {
 827                 $action = 'project_list';
 828         }
 829 }
 830 if (!defined($actions{$action})) {
 831         die_error(400, "Unknown action");
 832 }
 833 if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
 834     !$project) {
 835         die_error(400, "Project needed");
 836 }
 837 $actions{$action}->();
 838 exit;
 839
 840 ## ======================================================================
 841 ## action links
 842
 843 sub href {
 844         my %params = @_;
 845         # default is to use -absolute url() i.e. $my_uri
 846         my $href = $params{-full} ? $my_url : $my_uri;
 847
 848         $params{'project'} = $project unless exists $params{'project'};
 849
 850         if ($params{-replay}) {
 851                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 852                         if (!exists $params{$name}) {
 853                                 $params{$name} = $input_params{$name};
 854                         }
 855                 }
 856         }
 857
 858         my $use_pathinfo = gitweb_check_feature('pathinfo');
 859         if ($use_pathinfo and defined $params{'project'}) {
 860                 # try to put as many parameters as possible in PATH_INFO:
 861                 #   - project name
 862                 #   - action
 863                 #   - hash_parent or hash_parent_base:/file_parent
 864                 #   - hash or hash_base:/filename
 865                 #   - the snapshot_format as an appropriate suffix
 866
 867                 # When the script is the root DirectoryIndex for the domain,
 868                 # $href here would be something like http://gitweb.example.com/
 869                 # Thus, we strip any trailing / from $href, to spare us double
 870                 # slashes in the final URL
 871                 $href =~ s,/$,,;
 872
 873                 # Then add the project name, if present
 874                 $href .= "/".esc_url($params{'project'});
 875                 delete $params{'project'};
 876
 877                 # since we destructively absorb parameters, we keep this
 878                 # boolean that remembers if we're handling a snapshot
 879                 my $is_snapshot = $params{'action'} eq 'snapshot';
 880
 881                 # Summary just uses the project path URL, any other action is
 882                 # added to the URL
 883                 if (defined $params{'action'}) {
 884                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
 885                         delete $params{'action'};
 886                 }
 887
 888                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
 889                 # stripping nonexistent or useless pieces
 890                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
 891                         || $params{'hash_parent'} || $params{'hash'});
 892                 if (defined $params{'hash_base'}) {
 893                         if (defined $params{'hash_parent_base'}) {
 894                                 $href .= esc_url($params{'hash_parent_base'});
 895                                 # skip the file_parent if it's the same as the file_name
 896                                 delete $params{'file_parent'} if $params{'file_parent'} eq $params{'file_name'};
 897                                 if (defined $params{'file_parent'} && $params{'file_parent'} !~ /\.\./) {
 898                                         $href .= ":/".esc_url($params{'file_parent'});
 899                                         delete $params{'file_parent'};
 900                                 }
 901                                 $href .= "..";
 902                                 delete $params{'hash_parent'};
 903                                 delete $params{'hash_parent_base'};
 904                         } elsif (defined $params{'hash_parent'}) {
 905                                 $href .= esc_url($params{'hash_parent'}). "..";
 906                                 delete $params{'hash_parent'};
 907                         }
 908
 909                         $href .= esc_url($params{'hash_base'});
 910                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
 911                                 $href .= ":/".esc_url($params{'file_name'});
 912                                 delete $params{'file_name'};
 913                         }
 914                         delete $params{'hash'};
 915                         delete $params{'hash_base'};
 916                 } elsif (defined $params{'hash'}) {
 917                         $href .= esc_url($params{'hash'});
 918                         delete $params{'hash'};
 919                 }
 920
 921                 # If the action was a snapshot, we can absorb the
 922                 # snapshot_format parameter too
 923                 if ($is_snapshot) {
 924                         my $fmt = $params{'snapshot_format'};
 925                         # snapshot_format should always be defined when href()
 926                         # is called, but just in case some code forgets, we
 927                         # fall back to the default
 928                         $fmt ||= $snapshot_fmts[0];
 929                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
 930                         delete $params{'snapshot_format'};
 931                 }
 932         }
 933
 934         # now encode the parameters explicitly
 935         my @result = ();
 936         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
 937                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
 938                 if (defined $params{$name}) {
 939                         if (ref($params{$name}) eq "ARRAY") {
 940                                 foreach my $par (@{$params{$name}}) {
 941                                         push @result, $symbol . "=" . esc_param($par);
 942                                 }
 943                         } else {
 944                                 push @result, $symbol . "=" . esc_param($params{$name});
 945                         }
 946                 }
 947         }
 948         $href .= "?" . join(';', @result) if scalar @result;
 949
 950         return $href;
 951 }
 952
 953
 954 ## ======================================================================
 955 ## validation, quoting/unquoting and escaping
 956
 957 sub validate_action {
 958         my $input = shift || return undef;
 959         return undef unless exists $actions{$input};
 960         return $input;
 961 }
 962
 963 sub validate_project {
 964         my $input = shift || return undef;
 965         if (!validate_pathname($input) ||
 966                 !(-d "$projectroot/$input") ||
 967                 !check_export_ok("$projectroot/$input") ||
 968                 ($strict_export && !project_in_list($input))) {
 969                 return undef;
 970         } else {
 971                 return $input;
 972         }
 973 }
 974
 975 sub validate_pathname {
 976         my $input = shift || return undef;
 977
 978         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 979         # at the beginning, at the end, and between slashes.
 980         # also this catches doubled slashes
 981         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 982                 return undef;
 983         }
 984         # no null characters
 985         if ($input =~ m!\0!) {
 986                 return undef;
 987         }
 988         return $input;
 989 }
 990
 991 sub validate_refname {
 992         my $input = shift || return undef;
 993
 994         # textual hashes are O.K.
 995         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 996                 return $input;
 997         }
 998         # it must be correct pathname
 999         $input = validate_pathname($input)
1000                 or return undef;
1001         # restrictions on ref name according to git-check-ref-format
1002         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1003                 return undef;
1004         }
1005         return $input;
1006 }
1007
1008 # decode sequences of octets in utf8 into Perl's internal form,
1009 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1010 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1011 sub to_utf8 {
1012         my $str = shift;
1013         if (utf8::valid($str)) {
1014                 utf8::decode($str);
1015                 return $str;
1016         } else {
1017                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1018         }
1019 }
1020
1021 # quote unsafe chars, but keep the slash, even when it's not
1022 # correct, but quoted slashes look too horrible in bookmarks
1023 sub esc_param {
1024         my $str = shift;
1025         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
1026         $str =~ s/\+/%2B/g;
1027         $str =~ s/ /\+/g;
1028         return $str;
1029 }
1030
1031 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1032 sub esc_url {
1033         my $str = shift;
1034         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1035         $str =~ s/\+/%2B/g;
1036         $str =~ s/ /\+/g;
1037         return $str;
1038 }
1039
1040 # replace invalid utf8 character with SUBSTITUTION sequence
1041 sub esc_html {
1042         my $str = shift;
1043         my %opts = @_;
1044
1045         $str = to_utf8($str);
1046         $str = $cgi->escapeHTML($str);
1047         if ($opts{'-nbsp'}) {
1048                 $str =~ s/ /&nbsp;/g;
1049         }
1050         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1051         return $str;
1052 }
1053
1054 # quote control characters and escape filename to HTML
1055 sub esc_path {
1056         my $str = shift;
1057         my %opts = @_;
1058
1059         $str = to_utf8($str);
1060         $str = $cgi->escapeHTML($str);
1061         if ($opts{'-nbsp'}) {
1062                 $str =~ s/ /&nbsp;/g;
1063         }
1064         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1065         return $str;
1066 }
1067
1068 # Make control characters "printable", using character escape codes (CEC)
1069 sub quot_cec {
1070         my $cntrl = shift;
1071         my %opts = @_;
1072         my %es = ( # character escape codes, aka escape sequences
1073                 "\t" => '\t',   # tab            (HT)
1074                 "\n" => '\n',   # line feed      (LF)
1075                 "\r" => '\r',   # carrige return (CR)
1076                 "\f" => '\f',   # form feed      (FF)
1077                 "\b" => '\b',   # backspace      (BS)
1078                 "\a" => '\a',   # alarm (bell)   (BEL)
1079                 "\e" => '\e',   # escape         (ESC)
1080                 "\013" => '\v', # vertical tab   (VT)
1081                 "\000" => '\0', # nul character  (NUL)
1082         );
1083         my $chr = ( (exists $es{$cntrl})
1084                     ? $es{$cntrl}
1085                     : sprintf('\%2x', ord($cntrl)) );
1086         if ($opts{-nohtml}) {
1087                 return $chr;
1088         } else {
1089                 return "<span class=\"cntrl\">$chr</span>";
1090         }
1091 }
1092
1093 # Alternatively use unicode control pictures codepoints,
1094 # Unicode "printable representation" (PR)
1095 sub quot_upr {
1096         my $cntrl = shift;
1097         my %opts = @_;
1098
1099         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1100         if ($opts{-nohtml}) {
1101                 return $chr;
1102         } else {
1103                 return "<span class=\"cntrl\">$chr</span>";
1104         }
1105 }
1106
1107 # git may return quoted and escaped filenames
1108 sub unquote {
1109         my $str = shift;
1110
1111         sub unq {
1112                 my $seq = shift;
1113                 my %es = ( # character escape codes, aka escape sequences
1114                         't' => "\t",   # tab            (HT, TAB)
1115                         'n' => "\n",   # newline        (NL)
1116                         'r' => "\r",   # return         (CR)
1117                         'f' => "\f",   # form feed      (FF)
1118                         'b' => "\b",   # backspace      (BS)
1119                         'a' => "\a",   # alarm (bell)   (BEL)
1120                         'e' => "\e",   # escape         (ESC)
1121                         'v' => "\013", # vertical tab   (VT)
1122                 );
1123
1124                 if ($seq =~ m/^[0-7]{1,3}$/) {
1125                         # octal char sequence
1126                         return chr(oct($seq));
1127                 } elsif (exists $es{$seq}) {
1128                         # C escape sequence, aka character escape code
1129                         return $es{$seq};
1130                 }
1131                 # quoted ordinary character
1132                 return $seq;
1133         }
1134
1135         if ($str =~ m/^"(.*)"$/) {
1136                 # needs unquoting
1137                 $str = $1;
1138                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1139         }
1140         return $str;
1141 }
1142
1143 # escape tabs (convert tabs to spaces)
1144 sub untabify {
1145         my $line = shift;
1146
1147         while ((my $pos = index($line, "\t")) != -1) {
1148                 if (my $count = (8 - ($pos % 8))) {
1149                         my $spaces = ' ' x $count;
1150                         $line =~ s/\t/$spaces/;
1151                 }
1152         }
1153
1154         return $line;
1155 }
1156
1157 sub project_in_list {
1158         my $project = shift;
1159         my @list = git_get_projects_list();
1160         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1161 }
1162
1163 ## ----------------------------------------------------------------------
1164 ## HTML aware string manipulation
1165
1166 # Try to chop given string on a word boundary between position
1167 # $len and $len+$add_len. If there is no word boundary there,
1168 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1169 # (marking chopped part) would be longer than given string.
1170 sub chop_str {
1171         my $str = shift;
1172         my $len = shift;
1173         my $add_len = shift || 10;
1174         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1175
1176         # Make sure perl knows it is utf8 encoded so we don't
1177         # cut in the middle of a utf8 multibyte char.
1178         $str = to_utf8($str);
1179
1180         # allow only $len chars, but don't cut a word if it would fit in $add_len
1181         # if it doesn't fit, cut it if it's still longer than the dots we would add
1182         # remove chopped character entities entirely
1183
1184         # when chopping in the middle, distribute $len into left and right part
1185         # return early if chopping wouldn't make string shorter
1186         if ($where eq 'center') {
1187                 return $str if ($len + 5 >= length($str)); # filler is length 5
1188                 $len = int($len/2);
1189         } else {
1190                 return $str if ($len + 4 >= length($str)); # filler is length 4
1191         }
1192
1193         # regexps: ending and beginning with word part up to $add_len
1194         my $endre = qr/.{$len}\w{0,$add_len}/;
1195         my $begre = qr/\w{0,$add_len}.{$len}/;
1196
1197         if ($where eq 'left') {
1198                 $str =~ m/^(.*?)($begre)$/;
1199                 my ($lead, $body) = ($1, $2);
1200                 if (length($lead) > 4) {
1201                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
1202                         $lead = " ...";
1203                 }
1204                 return "$lead$body";
1205
1206         } elsif ($where eq 'center') {
1207                 $str =~ m/^($endre)(.*)$/;
1208                 my ($left, $str)  = ($1, $2);
1209                 $str =~ m/^(.*?)($begre)$/;
1210                 my ($mid, $right) = ($1, $2);
1211                 if (length($mid) > 5) {
1212                         $left  =~ s/&[^;]*$//;
1213                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
1214                         $mid = " ... ";
1215                 }
1216                 return "$left$mid$right";
1217
1218         } else {
1219                 $str =~ m/^($endre)(.*)$/;
1220                 my $body = $1;
1221                 my $tail = $2;
1222                 if (length($tail) > 4) {
1223                         $body =~ s/&[^;]*$//;
1224                         $tail = "... ";
1225                 }
1226                 return "$body$tail";
1227         }
1228 }
1229
1230 # takes the same arguments as chop_str, but also wraps a <span> around the
1231 # result with a title attribute if it does get chopped. Additionally, the
1232 # string is HTML-escaped.
1233 sub chop_and_escape_str {
1234         my ($str) = @_;
1235
1236         my $chopped = chop_str(@_);
1237         if ($chopped eq $str) {
1238                 return esc_html($chopped);
1239         } else {
1240                 $str =~ s/([[:cntrl:]])/?/g;
1241                 return $cgi->span({-title=>$str}, esc_html($chopped));
1242         }
1243 }
1244
1245 ## ----------------------------------------------------------------------
1246 ## functions returning short strings
1247
1248 # CSS class for given age value (in seconds)
1249 sub age_class {
1250         my $age = shift;
1251
1252         if (!defined $age) {
1253                 return "noage";
1254         } elsif ($age < 60*60*2) {
1255                 return "age0";
1256         } elsif ($age < 60*60*24*2) {
1257                 return "age1";
1258         } else {
1259                 return "age2";
1260         }
1261 }
1262
1263 # convert age in seconds to "nn units ago" string
1264 sub age_string {
1265         my $age = shift;
1266         my $age_str;
1267
1268         if ($age > 60*60*24*365*2) {
1269                 $age_str = (int $age/60/60/24/365);
1270                 $age_str .= " years ago";
1271         } elsif ($age > 60*60*24*(365/12)*2) {
1272                 $age_str = int $age/60/60/24/(365/12);
1273                 $age_str .= " months ago";
1274         } elsif ($age > 60*60*24*7*2) {
1275                 $age_str = int $age/60/60/24/7;
1276                 $age_str .= " weeks ago";
1277         } elsif ($age > 60*60*24*2) {
1278                 $age_str = int $age/60/60/24;
1279                 $age_str .= " days ago";
1280         } elsif ($age > 60*60*2) {
1281                 $age_str = int $age/60/60;
1282                 $age_str .= " hours ago";
1283         } elsif ($age > 60*2) {
1284                 $age_str = int $age/60;
1285                 $age_str .= " min ago";
1286         } elsif ($age > 2) {
1287                 $age_str = int $age;
1288                 $age_str .= " sec ago";
1289         } else {
1290                 $age_str .= " right now";
1291         }
1292         return $age_str;
1293 }
1294
1295 use constant {
1296         S_IFINVALID => 0030000,
1297         S_IFGITLINK => 0160000,
1298 };
1299
1300 # submodule/subproject, a commit object reference
1301 sub S_ISGITLINK {
1302         my $mode = shift;
1303
1304         return (($mode & S_IFMT) == S_IFGITLINK)
1305 }
1306
1307 # convert file mode in octal to symbolic file mode string
1308 sub mode_str {
1309         my $mode = oct shift;
1310
1311         if (S_ISGITLINK($mode)) {
1312                 return 'm---------';
1313         } elsif (S_ISDIR($mode & S_IFMT)) {
1314                 return 'drwxr-xr-x';
1315         } elsif (S_ISLNK($mode)) {
1316                 return 'lrwxrwxrwx';
1317         } elsif (S_ISREG($mode)) {
1318                 # git cares only about the executable bit
1319                 if ($mode & S_IXUSR) {
1320                         return '-rwxr-xr-x';
1321                 } else {
1322                         return '-rw-r--r--';
1323                 };
1324         } else {
1325                 return '----------';
1326         }
1327 }
1328
1329 # convert file mode in octal to file type string
1330 sub file_type {
1331         my $mode = shift;
1332
1333         if ($mode !~ m/^[0-7]+$/) {
1334                 return $mode;
1335         } else {
1336                 $mode = oct $mode;
1337         }
1338
1339         if (S_ISGITLINK($mode)) {
1340                 return "submodule";
1341         } elsif (S_ISDIR($mode & S_IFMT)) {
1342                 return "directory";
1343         } elsif (S_ISLNK($mode)) {
1344                 return "symlink";
1345         } elsif (S_ISREG($mode)) {
1346                 return "file";
1347         } else {
1348                 return "unknown";
1349         }
1350 }
1351
1352 # convert file mode in octal to file type description string
1353 sub file_type_long {
1354         my $mode = shift;
1355
1356         if ($mode !~ m/^[0-7]+$/) {
1357                 return $mode;
1358         } else {
1359                 $mode = oct $mode;
1360         }
1361
1362         if (S_ISGITLINK($mode)) {
1363                 return "submodule";
1364         } elsif (S_ISDIR($mode & S_IFMT)) {
1365                 return "directory";
1366         } elsif (S_ISLNK($mode)) {
1367                 return "symlink";
1368         } elsif (S_ISREG($mode)) {
1369                 if ($mode & S_IXUSR) {
1370                         return "executable";
1371                 } else {
1372                         return "file";
1373                 };
1374         } else {
1375                 return "unknown";
1376         }
1377 }
1378
1379
1380 ## ----------------------------------------------------------------------
1381 ## functions returning short HTML fragments, or transforming HTML fragments
1382 ## which don't belong to other sections
1383
1384 # format line of commit message.
1385 sub format_log_line_html {
1386         my $line = shift;
1387
1388         $line = esc_html($line, -nbsp=>1);
1389         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1390                 $cgi->a({-href => href(action=>"object", hash=>$1),
1391                                         -class => "text"}, $1);
1392         }eg;
1393
1394         return $line;
1395 }
1396
1397 # format marker of refs pointing to given object
1398
1399 # the destination action is chosen based on object type and current context:
1400 # - for annotated tags, we choose the tag view unless it's the current view
1401 #   already, in which case we go to shortlog view
1402 # - for other refs, we keep the current view if we're in history, shortlog or
1403 #   log view, and select shortlog otherwise
1404 sub format_ref_marker {
1405         my ($refs, $id) = @_;
1406         my $markers = '';
1407
1408         if (defined $refs->{$id}) {
1409                 foreach my $ref (@{$refs->{$id}}) {
1410                         # this code exploits the fact that non-lightweight tags are the
1411                         # only indirect objects, and that they are the only objects for which
1412                         # we want to use tag instead of shortlog as action
1413                         my ($type, $name) = qw();
1414                         my $indirect = ($ref =~ s/\^\{\}$//);
1415                         # e.g. tags/v2.6.11 or heads/next
1416                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1417                                 $type = $1;
1418                                 $name = $2;
1419                         } else {
1420                                 $type = "ref";
1421                                 $name = $ref;
1422                         }
1423
1424                         my $class = $type;
1425                         $class .= " indirect" if $indirect;
1426
1427                         my $dest_action = "shortlog";
1428
1429                         if ($indirect) {
1430                                 $dest_action = "tag" unless $action eq "tag";
1431                         } elsif ($action =~ /^(history|(short)?log)$/) {
1432                                 $dest_action = $action;
1433                         }
1434
1435                         my $dest = "";
1436                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1437                         $dest .= $ref;
1438
1439                         my $link = $cgi->a({
1440                                 -href => href(
1441                                         action=>$dest_action,
1442                                         hash=>$dest
1443                                 )}, $name);
1444
1445                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1446                                 $link . "</span>";
1447                 }
1448         }
1449
1450         if ($markers) {
1451                 return ' <span class="refs">'. $markers . '</span>';
1452         } else {
1453                 return "";
1454         }
1455 }
1456
1457 # format, perhaps shortened and with markers, title line
1458 sub format_subject_html {
1459         my ($long, $short, $href, $extra) = @_;
1460         $extra = '' unless defined($extra);
1461
1462         if (length($short) < length($long)) {
1463                 return $cgi->a({-href => $href, -class => "list subject",
1464                                 -title => to_utf8($long)},
1465                        esc_html($short) . $extra);
1466         } else {
1467                 return $cgi->a({-href => $href, -class => "list subject"},
1468                        esc_html($long)  . $extra);
1469         }
1470 }
1471
1472 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1473 sub format_git_diff_header_line {
1474         my $line = shift;
1475         my $diffinfo = shift;
1476         my ($from, $to) = @_;
1477
1478         if ($diffinfo->{'nparents'}) {
1479                 # combined diff
1480                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1481                 if ($to->{'href'}) {
1482                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1483                                          esc_path($to->{'file'}));
1484                 } else { # file was deleted (no href)
1485                         $line .= esc_path($to->{'file'});
1486                 }
1487         } else {
1488                 # "ordinary" diff
1489                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1490                 if ($from->{'href'}) {
1491                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1492                                          'a/' . esc_path($from->{'file'}));
1493                 } else { # file was added (no href)
1494                         $line .= 'a/' . esc_path($from->{'file'});
1495                 }
1496                 $line .= ' ';
1497                 if ($to->{'href'}) {
1498                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1499                                          'b/' . esc_path($to->{'file'}));
1500                 } else { # file was deleted
1501                         $line .= 'b/' . esc_path($to->{'file'});
1502                 }
1503         }
1504
1505         return "<div class=\"diff header\">$line</div>\n";
1506 }
1507
1508 # format extended diff header line, before patch itself
1509 sub format_extended_diff_header_line {
1510         my $line = shift;
1511         my $diffinfo = shift;
1512         my ($from, $to) = @_;
1513
1514         # match <path>
1515         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1516                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1517                                        esc_path($from->{'file'}));
1518         }
1519         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1520                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1521                                  esc_path($to->{'file'}));
1522         }
1523         # match single <mode>
1524         if ($line =~ m/\s(\d{6})$/) {
1525                 $line .= '<span class="info"> (' .
1526                          file_type_long($1) .
1527                          ')</span>';
1528         }
1529         # match <hash>
1530         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1531                 # can match only for combined diff
1532                 $line = 'index ';
1533                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1534                         if ($from->{'href'}[$i]) {
1535                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1536                                                   -class=>"hash"},
1537                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1538                         } else {
1539                                 $line .= '0' x 7;
1540                         }
1541                         # separator
1542                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1543                 }
1544                 $line .= '..';
1545                 if ($to->{'href'}) {
1546                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1547                                          substr($diffinfo->{'to_id'},0,7));
1548                 } else {
1549                         $line .= '0' x 7;
1550                 }
1551
1552         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1553                 # can match only for ordinary diff
1554                 my ($from_link, $to_link);
1555                 if ($from->{'href'}) {
1556                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1557                                              substr($diffinfo->{'from_id'},0,7));
1558                 } else {
1559                         $from_link = '0' x 7;
1560                 }
1561                 if ($to->{'href'}) {
1562                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1563                                            substr($diffinfo->{'to_id'},0,7));
1564                 } else {
1565                         $to_link = '0' x 7;
1566                 }
1567                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1568                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1569         }
1570
1571         return $line . "<br/>\n";
1572 }
1573
1574 # format from-file/to-file diff header
1575 sub format_diff_from_to_header {
1576         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1577         my $line;
1578         my $result = '';
1579
1580         $line = $from_line;
1581         #assert($line =~ m/^---/) if DEBUG;
1582         # no extra formatting for "^--- /dev/null"
1583         if (! $diffinfo->{'nparents'}) {
1584                 # ordinary (single parent) diff
1585                 if ($line =~ m!^--- "?a/!) {
1586                         if ($from->{'href'}) {
1587                                 $line = '--- a/' .
1588                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1589                                                 esc_path($from->{'file'}));
1590                         } else {
1591                                 $line = '--- a/' .
1592                                         esc_path($from->{'file'});
1593                         }
1594                 }
1595                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1596
1597         } else {
1598                 # combined diff (merge commit)
1599                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1600                         if ($from->{'href'}[$i]) {
1601                                 $line = '--- ' .
1602                                         $cgi->a({-href=>href(action=>"blobdiff",
1603                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1604                                                              hash_parent_base=>$parents[$i],
1605                                                              file_parent=>$from->{'file'}[$i],
1606                                                              hash=>$diffinfo->{'to_id'},
1607                                                              hash_base=>$hash,
1608                                                              file_name=>$to->{'file'}),
1609                                                  -class=>"path",
1610                                                  -title=>"diff" . ($i+1)},
1611                                                 $i+1) .
1612                                         '/' .
1613                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1614                                                 esc_path($from->{'file'}[$i]));
1615                         } else {
1616                                 $line = '--- /dev/null';
1617                         }
1618                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1619                 }
1620         }
1621
1622         $line = $to_line;
1623         #assert($line =~ m/^\+\+\+/) if DEBUG;
1624         # no extra formatting for "^+++ /dev/null"
1625         if ($line =~ m!^\+\+\+ "?b/!) {
1626                 if ($to->{'href'}) {
1627                         $line = '+++ b/' .
1628                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1629                                         esc_path($to->{'file'}));
1630                 } else {
1631                         $line = '+++ b/' .
1632                                 esc_path($to->{'file'});
1633                 }
1634         }
1635         $result .= qq!<div class="diff to_file">$line</div>\n!;
1636
1637         return $result;
1638 }
1639
1640 # create note for patch simplified by combined diff
1641 sub format_diff_cc_simplified {
1642         my ($diffinfo, @parents) = @_;
1643         my $result = '';
1644
1645         $result .= "<div class=\"diff header\">" .
1646                    "diff --cc ";
1647         if (!is_deleted($diffinfo)) {
1648                 $result .= $cgi->a({-href => href(action=>"blob",
1649                                                   hash_base=>$hash,
1650                                                   hash=>$diffinfo->{'to_id'},
1651                                                   file_name=>$diffinfo->{'to_file'}),
1652                                     -class => "path"},
1653                                    esc_path($diffinfo->{'to_file'}));
1654         } else {
1655                 $result .= esc_path($diffinfo->{'to_file'});
1656         }
1657         $result .= "</div>\n" . # class="diff header"
1658                    "<div class=\"diff nodifferences\">" .
1659                    "Simple merge" .
1660                    "</div>\n"; # class="diff nodifferences"
1661
1662         return $result;
1663 }
1664
1665 # format patch (diff) line (not to be used for diff headers)
1666 sub format_diff_line {
1667         my $line = shift;
1668         my ($from, $to) = @_;
1669         my $diff_class = "";
1670
1671         chomp $line;
1672
1673         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1674                 # combined diff
1675                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1676                 if ($line =~ m/^\@{3}/) {
1677                         $diff_class = " chunk_header";
1678                 } elsif ($line =~ m/^\\/) {
1679                         $diff_class = " incomplete";
1680                 } elsif ($prefix =~ tr/+/+/) {
1681                         $diff_class = " add";
1682                 } elsif ($prefix =~ tr/-/-/) {
1683                         $diff_class = " rem";
1684                 }
1685         } else {
1686                 # assume ordinary diff
1687                 my $char = substr($line, 0, 1);
1688                 if ($char eq '+') {
1689                         $diff_class = " add";
1690                 } elsif ($char eq '-') {
1691                         $diff_class = " rem";
1692                 } elsif ($char eq '@') {
1693                         $diff_class = " chunk_header";
1694                 } elsif ($char eq "\\") {
1695                         $diff_class = " incomplete";
1696                 }
1697         }
1698         $line = untabify($line);
1699         if ($from && $to && $line =~ m/^\@{2} /) {
1700                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1701                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1702
1703                 $from_lines = 0 unless defined $from_lines;
1704                 $to_lines   = 0 unless defined $to_lines;
1705
1706                 if ($from->{'href'}) {
1707                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1708                                              -class=>"list"}, $from_text);
1709                 }
1710                 if ($to->{'href'}) {
1711                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1712                                              -class=>"list"}, $to_text);
1713                 }
1714                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1715                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1716                 return "<div class=\"diff$diff_class\">$line</div>\n";
1717         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1718                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1719                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1720
1721                 @from_text = split(' ', $ranges);
1722                 for (my $i = 0; $i < @from_text; ++$i) {
1723                         ($from_start[$i], $from_nlines[$i]) =
1724                                 (split(',', substr($from_text[$i], 1)), 0);
1725                 }
1726
1727                 $to_text   = pop @from_text;
1728                 $to_start  = pop @from_start;
1729                 $to_nlines = pop @from_nlines;
1730
1731                 $line = "<span class=\"chunk_info\">$prefix ";
1732                 for (my $i = 0; $i < @from_text; ++$i) {
1733                         if ($from->{'href'}[$i]) {
1734                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1735                                                   -class=>"list"}, $from_text[$i]);
1736                         } else {
1737                                 $line .= $from_text[$i];
1738                         }
1739                         $line .= " ";
1740                 }
1741                 if ($to->{'href'}) {
1742                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1743                                           -class=>"list"}, $to_text);
1744                 } else {
1745                         $line .= $to_text;
1746                 }
1747                 $line .= " $prefix</span>" .
1748                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1749                 return "<div class=\"diff$diff_class\">$line</div>\n";
1750         }
1751         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1752 }
1753
1754 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1755 # linked.  Pass the hash of the tree/commit to snapshot.
1756 sub format_snapshot_links {
1757         my ($hash) = @_;
1758         my $num_fmts = @snapshot_fmts;
1759         if ($num_fmts > 1) {
1760                 # A parenthesized list of links bearing format names.
1761                 # e.g. "snapshot (_tar.gz_ _zip_)"
1762                 return "snapshot (" . join(' ', map
1763                         $cgi->a({
1764                                 -href => href(
1765                                         action=>"snapshot",
1766                                         hash=>$hash,
1767                                         snapshot_format=>$_
1768                                 )
1769                         }, $known_snapshot_formats{$_}{'display'})
1770                 , @snapshot_fmts) . ")";
1771         } elsif ($num_fmts == 1) {
1772                 # A single "snapshot" link whose tooltip bears the format name.
1773                 # i.e. "_snapshot_"
1774                 my ($fmt) = @snapshot_fmts;
1775                 return
1776                         $cgi->a({
1777                                 -href => href(
1778                                         action=>"snapshot",
1779                                         hash=>$hash,
1780                                         snapshot_format=>$fmt
1781                                 ),
1782                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1783                         }, "snapshot");
1784         } else { # $num_fmts == 0
1785                 return undef;
1786         }
1787 }
1788
1789 ## ......................................................................
1790 ## functions returning values to be passed, perhaps after some
1791 ## transformation, to other functions; e.g. returning arguments to href()
1792
1793 # returns hash to be passed to href to generate gitweb URL
1794 # in -title key it returns description of link
1795 sub get_feed_info {
1796         my $format = shift || 'Atom';
1797         my %res = (action => lc($format));
1798
1799         # feed links are possible only for project views
1800         return unless (defined $project);
1801         # some views should link to OPML, or to generic project feed,
1802         # or don't have specific feed yet (so they should use generic)
1803         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1804
1805         my $branch;
1806         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1807         # from tag links; this also makes possible to detect branch links
1808         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1809             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1810                 $branch = $1;
1811         }
1812         # find log type for feed description (title)
1813         my $type = 'log';
1814         if (defined $file_name) {
1815                 $type  = "history of $file_name";
1816                 $type .= "/" if ($action eq 'tree');
1817                 $type .= " on '$branch'" if (defined $branch);
1818         } else {
1819                 $type = "log of $branch" if (defined $branch);
1820         }
1821
1822         $res{-title} = $type;
1823         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1824         $res{'file_name'} = $file_name;
1825
1826         return %res;
1827 }
1828
1829 ## ----------------------------------------------------------------------
1830 ## git utility subroutines, invoking git commands
1831
1832 # returns path to the core git executable and the --git-dir parameter as list
1833 sub git_cmd {
1834         return $GIT, '--git-dir='.$git_dir;
1835 }
1836
1837 # quote the given arguments for passing them to the shell
1838 # quote_command("command", "arg 1", "arg with ' and ! characters")
1839 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1840 # Try to avoid using this function wherever possible.
1841 sub quote_command {
1842         return join(' ',
1843                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
1844 }
1845
1846 # get HEAD ref of given project as hash
1847 sub git_get_head_hash {
1848         my $project = shift;
1849         my $o_git_dir = $git_dir;
1850         my $retval = undef;
1851         $git_dir = "$projectroot/$project";
1852         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1853                 my $head = <$fd>;
1854                 close $fd;
1855                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1856                         $retval = $1;
1857                 }
1858         }
1859         if (defined $o_git_dir) {
1860                 $git_dir = $o_git_dir;
1861         }
1862         return $retval;
1863 }
1864
1865 # get type of given object
1866 sub git_get_type {
1867         my $hash = shift;
1868
1869         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1870         my $type = <$fd>;
1871         close $fd or return;
1872         chomp $type;
1873         return $type;
1874 }
1875
1876 # repository configuration
1877 our $config_file = '';
1878 our %config;
1879
1880 # store multiple values for single key as anonymous array reference
1881 # single values stored directly in the hash, not as [ <value> ]
1882 sub hash_set_multi {
1883         my ($hash, $key, $value) = @_;
1884
1885         if (!exists $hash->{$key}) {
1886                 $hash->{$key} = $value;
1887         } elsif (!ref $hash->{$key}) {
1888                 $hash->{$key} = [ $hash->{$key}, $value ];
1889         } else {
1890                 push @{$hash->{$key}}, $value;
1891         }
1892 }
1893
1894 # return hash of git project configuration
1895 # optionally limited to some section, e.g. 'gitweb'
1896 sub git_parse_project_config {
1897         my $section_regexp = shift;
1898         my %config;
1899
1900         local $/ = "\0";
1901
1902         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1903                 or return;
1904
1905         while (my $keyval = <$fh>) {
1906                 chomp $keyval;
1907                 my ($key, $value) = split(/\n/, $keyval, 2);
1908
1909                 hash_set_multi(\%config, $key, $value)
1910                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1911         }
1912         close $fh;
1913
1914         return %config;
1915 }
1916
1917 # convert config value to boolean: 'true' or 'false'
1918 # no value, number > 0, 'true' and 'yes' values are true
1919 # rest of values are treated as false (never as error)
1920 sub config_to_bool {
1921         my $val = shift;
1922
1923         return 1 if !defined $val;             # section.key
1924
1925         # strip leading and trailing whitespace
1926         $val =~ s/^\s+//;
1927         $val =~ s/\s+$//;
1928
1929         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
1930                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1931 }
1932
1933 # convert config value to simple decimal number
1934 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1935 # to be multiplied by 1024, 1048576, or 1073741824
1936 sub config_to_int {
1937         my $val = shift;
1938
1939         # strip leading and trailing whitespace
1940         $val =~ s/^\s+//;
1941         $val =~ s/\s+$//;
1942
1943         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1944                 $unit = lc($unit);
1945                 # unknown unit is treated as 1
1946                 return $num * ($unit eq 'g' ? 1073741824 :
1947                                $unit eq 'm' ?    1048576 :
1948                                $unit eq 'k' ?       1024 : 1);
1949         }
1950         return $val;
1951 }
1952
1953 # convert config value to array reference, if needed
1954 sub config_to_multi {
1955         my $val = shift;
1956
1957         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1958 }
1959
1960 sub git_get_project_config {
1961         my ($key, $type) = @_;
1962
1963         # key sanity check
1964         return unless ($key);
1965         $key =~ s/^gitweb\.//;
1966         return if ($key =~ m/\W/);
1967
1968         # type sanity check
1969         if (defined $type) {
1970                 $type =~ s/^--//;
1971                 $type = undef
1972                         unless ($type eq 'bool' || $type eq 'int');
1973         }
1974
1975         # get config
1976         if (!defined $config_file ||
1977             $config_file ne "$git_dir/config") {
1978                 %config = git_parse_project_config('gitweb');
1979                 $config_file = "$git_dir/config";
1980         }
1981
1982         # check if config variable (key) exists
1983         return unless exists $config{"gitweb.$key"};
1984
1985         # ensure given type
1986         if (!defined $type) {
1987                 return $config{"gitweb.$key"};
1988         } elsif ($type eq 'bool') {
1989                 # backward compatibility: 'git config --bool' returns true/false
1990                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1991         } elsif ($type eq 'int') {
1992                 return config_to_int($config{"gitweb.$key"});
1993         }
1994         return $config{"gitweb.$key"};
1995 }
1996
1997 # get hash of given path at given ref
1998 sub git_get_hash_by_path {
1999         my $base = shift;
2000         my $path = shift || return undef;
2001         my $type = shift;
2002
2003         $path =~ s,/+$,,;
2004
2005         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2006                 or die_error(500, "Open git-ls-tree failed");
2007         my $line = <$fd>;
2008         close $fd or return undef;
2009
2010         if (!defined $line) {
2011                 # there is no tree or hash given by $path at $base
2012                 return undef;
2013         }
2014
2015         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2016         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2017         if (defined $type && $type ne $2) {
2018                 # type doesn't match
2019                 return undef;
2020         }
2021         return $3;
2022 }
2023
2024 # get path of entry with given hash at given tree-ish (ref)
2025 # used to get 'from' filename for combined diff (merge commit) for renames
2026 sub git_get_path_by_hash {
2027         my $base = shift || return;
2028         my $hash = shift || return;
2029
2030         local $/ = "\0";
2031
2032         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2033                 or return undef;
2034         while (my $line = <$fd>) {
2035                 chomp $line;
2036
2037                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2038                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2039                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2040                         close $fd;
2041                         return $1;
2042                 }
2043         }
2044         close $fd;
2045         return undef;
2046 }
2047
2048 ## ......................................................................
2049 ## git utility functions, directly accessing git repository
2050
2051 sub git_get_project_description {
2052         my $path = shift;
2053
2054         $git_dir = "$projectroot/$path";
2055         open my $fd, '<', "$git_dir/description"
2056                 or return git_get_project_config('description');
2057         my $descr = <$fd>;
2058         close $fd;
2059         if (defined $descr) {
2060                 chomp $descr;
2061         }
2062         return $descr;
2063 }
2064
2065 sub git_get_project_ctags {
2066         my $path = shift;
2067         my $ctags = {};
2068
2069         $git_dir = "$projectroot/$path";
2070         opendir my $dh, "$git_dir/ctags"
2071                 or return $ctags;
2072         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2073                 open my $ct, '<', $_ or next;
2074                 my $val = <$ct>;
2075                 chomp $val;
2076                 close $ct;
2077                 my $ctag = $_; $ctag =~ s#.*/##;
2078                 $ctags->{$ctag} = $val;
2079         }
2080         closedir $dh;
2081         $ctags;
2082 }
2083
2084 sub git_populate_project_tagcloud {
2085         my $ctags = shift;
2086
2087         # First, merge different-cased tags; tags vote on casing
2088         my %ctags_lc;
2089         foreach (keys %$ctags) {
2090                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2091                 if (not $ctags_lc{lc $_}->{topcount}
2092                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2093                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2094                         $ctags_lc{lc $_}->{topname} = $_;
2095                 }
2096         }
2097
2098         my $cloud;
2099         if (eval { require HTML::TagCloud; 1; }) {
2100                 $cloud = HTML::TagCloud->new;
2101                 foreach (sort keys %ctags_lc) {
2102                         # Pad the title with spaces so that the cloud looks
2103                         # less crammed.
2104                         my $title = $ctags_lc{$_}->{topname};
2105                         $title =~ s/ /&nbsp;/g;
2106                         $title =~ s/^/&nbsp;/g;
2107                         $title =~ s/$/&nbsp;/g;
2108                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2109                 }
2110         } else {
2111                 $cloud = \%ctags_lc;
2112         }
2113         $cloud;
2114 }
2115
2116 sub git_show_project_tagcloud {
2117         my ($cloud, $count) = @_;
2118         print STDERR ref($cloud)."..\n";
2119         if (ref $cloud eq 'HTML::TagCloud') {
2120                 return $cloud->html_and_css($count);
2121         } else {
2122                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2123                 return '<p align="center">' . join (', ', map {
2124                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2125                 } splice(@tags, 0, $count)) . '</p>';
2126         }
2127 }
2128
2129 sub git_get_project_url_list {
2130         my $path = shift;
2131
2132         $git_dir = "$projectroot/$path";
2133         open my $fd, '<', "$git_dir/cloneurl"
2134                 or return wantarray ?
2135                 @{ config_to_multi(git_get_project_config('url')) } :
2136                    config_to_multi(git_get_project_config('url'));
2137         my @git_project_url_list = map { chomp; $_ } <$fd>;
2138         close $fd;
2139
2140         return wantarray ? @git_project_url_list : \@git_project_url_list;
2141 }
2142
2143 sub git_get_projects_list {
2144         my ($filter) = @_;
2145         my @list;
2146
2147         $filter ||= '';
2148         $filter =~ s/\.git$//;
2149
2150         my $check_forks = gitweb_check_feature('forks');
2151
2152         if (-d $projects_list) {
2153                 # search in directory
2154                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2155                 # remove the trailing "/"
2156                 $dir =~ s!/+$!!;
2157                 my $pfxlen = length("$dir");
2158                 my $pfxdepth = ($dir =~ tr!/!!);
2159
2160                 File::Find::find({
2161                         follow_fast => 1, # follow symbolic links
2162                         follow_skip => 2, # ignore duplicates
2163                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2164                         wanted => sub {
2165                                 # skip project-list toplevel, if we get it.
2166                                 return if (m!^[/.]$!);
2167                                 # only directories can be git repositories
2168                                 return unless (-d $_);
2169                                 # don't traverse too deep (Find is super slow on os x)
2170                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2171                                         $File::Find::prune = 1;
2172                                         return;
2173                                 }
2174
2175                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2176                                 # we check related file in $projectroot
2177                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2178                                 if (check_export_ok("$projectroot/$path")) {
2179                                         push @list, { path => $path };
2180                                         $File::Find::prune = 1;
2181                                 }
2182                         },
2183                 }, "$dir");
2184
2185         } elsif (-f $projects_list) {
2186                 # read from file(url-encoded):
2187                 # 'git%2Fgit.git Linus+Torvalds'
2188                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2189                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2190                 my %paths;
2191                 open my $fd, '<', $projects_list or return;
2192         PROJECT:
2193                 while (my $line = <$fd>) {
2194                         chomp $line;
2195                         my ($path, $owner) = split ' ', $line;
2196                         $path = unescape($path);
2197                         $owner = unescape($owner);
2198                         if (!defined $path) {
2199                                 next;
2200                         }
2201                         if ($filter ne '') {
2202                                 # looking for forks;
2203                                 my $pfx = substr($path, 0, length($filter));
2204                                 if ($pfx ne $filter) {
2205                                         next PROJECT;
2206                                 }
2207                                 my $sfx = substr($path, length($filter));
2208                                 if ($sfx !~ /^\/.*\.git$/) {
2209                                         next PROJECT;
2210                                 }
2211                         } elsif ($check_forks) {
2212                         PATH:
2213                                 foreach my $filter (keys %paths) {
2214                                         # looking for forks;
2215                                         my $pfx = substr($path, 0, length($filter));
2216                                         if ($pfx ne $filter) {
2217                                                 next PATH;
2218                                         }
2219                                         my $sfx = substr($path, length($filter));
2220                                         if ($sfx !~ /^\/.*\.git$/) {
2221                                                 next PATH;
2222                                         }
2223                                         # is a fork, don't include it in
2224                                         # the list
2225                                         next PROJECT;
2226                                 }
2227                         }
2228                         if (check_export_ok("$projectroot/$path")) {
2229                                 my $pr = {
2230                                         path => $path,
2231                                         owner => to_utf8($owner),
2232                                 };
2233                                 push @list, $pr;
2234                                 (my $forks_path = $path) =~ s/\.git$//;
2235                                 $paths{$forks_path}++;
2236                         }
2237                 }
2238                 close $fd;
2239         }
2240         return @list;
2241 }
2242
2243 our $gitweb_project_owner = undef;
2244 sub git_get_project_list_from_file {
2245
2246         return if (defined $gitweb_project_owner);
2247
2248         $gitweb_project_owner = {};
2249         # read from file (url-encoded):
2250         # 'git%2Fgit.git Linus+Torvalds'
2251         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2252         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2253         if (-f $projects_list) {
2254                 open(my $fd, '<', $projects_list);
2255                 while (my $line = <$fd>) {
2256                         chomp $line;
2257                         my ($pr, $ow) = split ' ', $line;
2258                         $pr = unescape($pr);
2259                         $ow = unescape($ow);
2260                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2261                 }
2262                 close $fd;
2263         }
2264 }
2265
2266 sub git_get_project_owner {
2267         my $project = shift;
2268         my $owner;
2269
2270         return undef unless $project;
2271         $git_dir = "$projectroot/$project";
2272
2273         if (!defined $gitweb_project_owner) {
2274                 git_get_project_list_from_file();
2275         }
2276
2277         if (exists $gitweb_project_owner->{$project}) {
2278                 $owner = $gitweb_project_owner->{$project};
2279         }
2280         if (!defined $owner){
2281                 $owner = git_get_project_config('owner');
2282         }
2283         if (!defined $owner) {
2284                 $owner = get_file_owner("$git_dir");
2285         }
2286
2287         return $owner;
2288 }
2289
2290 sub git_get_last_activity {
2291         my ($path) = @_;
2292         my $fd;
2293
2294         $git_dir = "$projectroot/$path";
2295         open($fd, "-|", git_cmd(), 'for-each-ref',
2296              '--format=%(committer)',
2297              '--sort=-committerdate',
2298              '--count=1',
2299              'refs/heads') or return;
2300         my $most_recent = <$fd>;
2301         close $fd or return;
2302         if (defined $most_recent &&
2303             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2304                 my $timestamp = $1;
2305                 my $age = time - $timestamp;
2306                 return ($age, age_string($age));
2307         }
2308         return (undef, undef);
2309 }
2310
2311 sub git_get_references {
2312         my $type = shift || "";
2313         my %refs;
2314         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2315         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2316         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2317                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2318                 or return;
2319
2320         while (my $line = <$fd>) {
2321                 chomp $line;
2322                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2323                         if (defined $refs{$1}) {
2324                                 push @{$refs{$1}}, $2;
2325                         } else {
2326                                 $refs{$1} = [ $2 ];
2327                         }
2328                 }
2329         }
2330         close $fd or return;
2331         return \%refs;
2332 }
2333
2334 sub git_get_rev_name_tags {
2335         my $hash = shift || return undef;
2336
2337         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2338                 or return;
2339         my $name_rev = <$fd>;
2340         close $fd;
2341
2342         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2343                 return $1;
2344         } else {
2345                 # catches also '$hash undefined' output
2346                 return undef;
2347         }
2348 }
2349
2350 ## ----------------------------------------------------------------------
2351 ## parse to hash functions
2352
2353 sub parse_date {
2354         my $epoch = shift;
2355         my $tz = shift || "-0000";
2356
2357         my %date;
2358         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2359         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2360         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2361         $date{'hour'} = $hour;
2362         $date{'minute'} = $min;
2363         $date{'mday'} = $mday;
2364         $date{'day'} = $days[$wday];
2365         $date{'month'} = $months[$mon];
2366         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2367                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2368         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2369                              $mday, $months[$mon], $hour ,$min;
2370         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2371                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2372
2373         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2374         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2375         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2376         $date{'hour_local'} = $hour;
2377         $date{'minute_local'} = $min;
2378         $date{'tz_local'} = $tz;
2379         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2380                                   1900+$year, $mon+1, $mday,
2381                                   $hour, $min, $sec, $tz);
2382         return %date;
2383 }
2384
2385 sub parse_tag {
2386         my $tag_id = shift;
2387         my %tag;
2388         my @comment;
2389
2390         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2391         $tag{'id'} = $tag_id;
2392         while (my $line = <$fd>) {
2393                 chomp $line;
2394                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2395                         $tag{'object'} = $1;
2396                 } elsif ($line =~ m/^type (.+)$/) {
2397                         $tag{'type'} = $1;
2398                 } elsif ($line =~ m/^tag (.+)$/) {
2399                         $tag{'name'} = $1;
2400                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2401                         $tag{'author'} = $1;
2402                         $tag{'epoch'} = $2;
2403                         $tag{'tz'} = $3;
2404                 } elsif ($line =~ m/--BEGIN/) {
2405                         push @comment, $line;
2406                         last;
2407                 } elsif ($line eq "") {
2408                         last;
2409                 }
2410         }
2411         push @comment, <$fd>;
2412         $tag{'comment'} = \@comment;
2413         close $fd or return;
2414         if (!defined $tag{'name'}) {
2415                 return
2416         };
2417         return %tag
2418 }
2419
2420 sub parse_commit_text {
2421         my ($commit_text, $withparents) = @_;
2422         my @commit_lines = split '\n', $commit_text;
2423         my %co;
2424
2425         pop @commit_lines; # Remove '\0'
2426
2427         if (! @commit_lines) {
2428                 return;
2429         }
2430
2431         my $header = shift @commit_lines;
2432         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2433                 return;
2434         }
2435         ($co{'id'}, my @parents) = split ' ', $header;
2436         while (my $line = shift @commit_lines) {
2437                 last if $line eq "\n";
2438                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2439                         $co{'tree'} = $1;
2440                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2441                         push @parents, $1;
2442                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2443                         $co{'author'} = $1;
2444                         $co{'author_epoch'} = $2;
2445                         $co{'author_tz'} = $3;
2446                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2447                                 $co{'author_name'}  = $1;
2448                                 $co{'author_email'} = $2;
2449                         } else {
2450                                 $co{'author_name'} = $co{'author'};
2451                         }
2452                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2453                         $co{'committer'} = $1;
2454                         $co{'committer_epoch'} = $2;
2455                         $co{'committer_tz'} = $3;
2456                         $co{'committer_name'} = $co{'committer'};
2457                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2458                                 $co{'committer_name'}  = $1;
2459                                 $co{'committer_email'} = $2;
2460                         } else {
2461                                 $co{'committer_name'} = $co{'committer'};
2462                         }
2463                 }
2464         }
2465         if (!defined $co{'tree'}) {
2466                 return;
2467         };
2468         $co{'parents'} = \@parents;
2469         $co{'parent'} = $parents[0];
2470
2471         foreach my $title (@commit_lines) {
2472                 $title =~ s/^    //;
2473                 if ($title ne "") {
2474                         $co{'title'} = chop_str($title, 80, 5);
2475                         # remove leading stuff of merges to make the interesting part visible
2476                         if (length($title) > 50) {
2477                                 $title =~ s/^Automatic //;
2478                                 $title =~ s/^merge (of|with) /Merge ... /i;
2479                                 if (length($title) > 50) {
2480                                         $title =~ s/(http|rsync):\/\///;
2481                                 }
2482                                 if (length($title) > 50) {
2483                                         $title =~ s/(master|www|rsync)\.//;
2484                                 }
2485                                 if (length($title) > 50) {
2486                                         $title =~ s/kernel.org:?//;
2487                                 }
2488                                 if (length($title) > 50) {
2489                                         $title =~ s/\/pub\/scm//;
2490                                 }
2491                         }
2492                         $co{'title_short'} = chop_str($title, 50, 5);
2493                         last;
2494                 }
2495         }
2496         if (! defined $co{'title'} || $co{'title'} eq "") {
2497                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2498         }
2499         # remove added spaces
2500         foreach my $line (@commit_lines) {
2501                 $line =~ s/^    //;
2502         }
2503         $co{'comment'} = \@commit_lines;
2504
2505         my $age = time - $co{'committer_epoch'};
2506         $co{'age'} = $age;
2507         $co{'age_string'} = age_string($age);
2508         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2509         if ($age > 60*60*24*7*2) {
2510                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2511                 $co{'age_string_age'} = $co{'age_string'};
2512         } else {
2513                 $co{'age_string_date'} = $co{'age_string'};
2514                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2515         }
2516         return %co;
2517 }
2518
2519 sub parse_commit {
2520         my ($commit_id) = @_;
2521         my %co;
2522
2523         local $/ = "\0";
2524
2525         open my $fd, "-|", git_cmd(), "rev-list",
2526                 "--parents",
2527                 "--header",
2528                 "--max-count=1",
2529                 $commit_id,
2530                 "--",
2531                 or die_error(500, "Open git-rev-list failed");
2532         %co = parse_commit_text(<$fd>, 1);
2533         close $fd;
2534
2535         return %co;
2536 }
2537
2538 sub parse_commits {
2539         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2540         my @cos;
2541
2542         $maxcount ||= 1;
2543         $skip ||= 0;
2544
2545         local $/ = "\0";
2546
2547         open my $fd, "-|", git_cmd(), "rev-list",
2548                 "--header",
2549                 @args,
2550                 ("--max-count=" . $maxcount),
2551                 ("--skip=" . $skip),
2552                 @extra_options,
2553                 $commit_id,
2554                 "--",
2555                 ($filename ? ($filename) : ())
2556                 or die_error(500, "Open git-rev-list failed");
2557         while (my $line = <$fd>) {
2558                 my %co = parse_commit_text($line);
2559                 push @cos, \%co;
2560         }
2561         close $fd;
2562
2563         return wantarray ? @cos : \@cos;
2564 }
2565
2566 # parse line of git-diff-tree "raw" output
2567 sub parse_difftree_raw_line {
2568         my $line = shift;
2569         my %res;
2570
2571         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2572         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2573         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2574                 $res{'from_mode'} = $1;
2575                 $res{'to_mode'} = $2;
2576                 $res{'from_id'} = $3;
2577                 $res{'to_id'} = $4;
2578                 $res{'status'} = $5;
2579                 $res{'similarity'} = $6;
2580                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2581                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2582                 } else {
2583                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2584                 }
2585         }
2586         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2587         # combined diff (for merge commit)
2588         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2589                 $res{'nparents'}  = length($1);
2590                 $res{'from_mode'} = [ split(' ', $2) ];
2591                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2592                 $res{'from_id'} = [ split(' ', $3) ];
2593                 $res{'to_id'} = pop @{$res{'from_id'}};
2594                 $res{'status'} = [ split('', $4) ];
2595                 $res{'to_file'} = unquote($5);
2596         }
2597         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2598         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2599                 $res{'commit'} = $1;
2600         }
2601
2602         return wantarray ? %res : \%res;
2603 }
2604
2605 # wrapper: return parsed line of git-diff-tree "raw" output
2606 # (the argument might be raw line, or parsed info)
2607 sub parsed_difftree_line {
2608         my $line_or_ref = shift;
2609
2610         if (ref($line_or_ref) eq "HASH") {
2611                 # pre-parsed (or generated by hand)
2612                 return $line_or_ref;
2613         } else {
2614                 return parse_difftree_raw_line($line_or_ref);
2615         }
2616 }
2617
2618 # parse line of git-ls-tree output
2619 sub parse_ls_tree_line {
2620         my $line = shift;
2621         my %opts = @_;
2622         my %res;
2623
2624         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2625         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2626
2627         $res{'mode'} = $1;
2628         $res{'type'} = $2;
2629         $res{'hash'} = $3;
2630         if ($opts{'-z'}) {
2631                 $res{'name'} = $4;
2632         } else {
2633                 $res{'name'} = unquote($4);
2634         }
2635
2636         return wantarray ? %res : \%res;
2637 }
2638
2639 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2640 sub parse_from_to_diffinfo {
2641         my ($diffinfo, $from, $to, @parents) = @_;
2642
2643         if ($diffinfo->{'nparents'}) {
2644                 # combined diff
2645                 $from->{'file'} = [];
2646                 $from->{'href'} = [];
2647                 fill_from_file_info($diffinfo, @parents)
2648                         unless exists $diffinfo->{'from_file'};
2649                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2650                         $from->{'file'}[$i] =
2651                                 defined $diffinfo->{'from_file'}[$i] ?
2652                                         $diffinfo->{'from_file'}[$i] :
2653                                         $diffinfo->{'to_file'};
2654                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2655                                 $from->{'href'}[$i] = href(action=>"blob",
2656                                                            hash_base=>$parents[$i],
2657                                                            hash=>$diffinfo->{'from_id'}[$i],
2658                                                            file_name=>$from->{'file'}[$i]);
2659                         } else {
2660                                 $from->{'href'}[$i] = undef;
2661                         }
2662                 }
2663         } else {
2664                 # ordinary (not combined) diff
2665                 $from->{'file'} = $diffinfo->{'from_file'};
2666                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2667                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2668                                                hash=>$diffinfo->{'from_id'},
2669                                                file_name=>$from->{'file'});
2670                 } else {
2671                         delete $from->{'href'};
2672                 }
2673         }
2674
2675         $to->{'file'} = $diffinfo->{'to_file'};
2676         if (!is_deleted($diffinfo)) { # file exists in result
2677                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2678                                      hash=>$diffinfo->{'to_id'},
2679                                      file_name=>$to->{'file'});
2680         } else {
2681                 delete $to->{'href'};
2682         }
2683 }
2684
2685 ## ......................................................................
2686 ## parse to array of hashes functions
2687
2688 sub git_get_heads_list {
2689         my $limit = shift;
2690         my @headslist;
2691
2692         open my $fd, '-|', git_cmd(), 'for-each-ref',
2693                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2694                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2695                 'refs/heads'
2696                 or return;
2697         while (my $line = <$fd>) {
2698                 my %ref_item;
2699
2700                 chomp $line;
2701                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2702                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2703                 my ($committer, $epoch, $tz) =
2704                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2705                 $ref_item{'fullname'}  = $name;
2706                 $name =~ s!^refs/heads/!!;
2707
2708                 $ref_item{'name'}  = $name;
2709                 $ref_item{'id'}    = $hash;
2710                 $ref_item{'title'} = $title || '(no commit message)';
2711                 $ref_item{'epoch'} = $epoch;
2712                 if ($epoch) {
2713                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2714                 } else {
2715                         $ref_item{'age'} = "unknown";
2716                 }
2717
2718                 push @headslist, \%ref_item;
2719         }
2720         close $fd;
2721
2722         return wantarray ? @headslist : \@headslist;
2723 }
2724
2725 sub git_get_tags_list {
2726         my $limit = shift;
2727         my @tagslist;
2728
2729         open my $fd, '-|', git_cmd(), 'for-each-ref',
2730                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2731                 '--format=%(objectname) %(objecttype) %(refname) '.
2732                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2733                 'refs/tags'
2734                 or return;
2735         while (my $line = <$fd>) {
2736                 my %ref_item;
2737
2738                 chomp $line;
2739                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2740                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2741                 my ($creator, $epoch, $tz) =
2742                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2743                 $ref_item{'fullname'} = $name;
2744                 $name =~ s!^refs/tags/!!;
2745
2746                 $ref_item{'type'} = $type;
2747                 $ref_item{'id'} = $id;
2748                 $ref_item{'name'} = $name;
2749                 if ($type eq "tag") {
2750                         $ref_item{'subject'} = $title;
2751                         $ref_item{'reftype'} = $reftype;
2752                         $ref_item{'refid'}   = $refid;
2753                 } else {
2754                         $ref_item{'reftype'} = $type;
2755                         $ref_item{'refid'}   = $id;
2756                 }
2757
2758                 if ($type eq "tag" || $type eq "commit") {
2759                         $ref_item{'epoch'} = $epoch;
2760                         if ($epoch) {
2761                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2762                         } else {
2763                                 $ref_item{'age'} = "unknown";
2764                         }
2765                 }
2766
2767                 push @tagslist, \%ref_item;
2768         }
2769         close $fd;
2770
2771         return wantarray ? @tagslist : \@tagslist;
2772 }
2773
2774 ## ----------------------------------------------------------------------
2775 ## filesystem-related functions
2776
2777 sub get_file_owner {
2778         my $path = shift;
2779
2780         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2781         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2782         if (!defined $gcos) {
2783                 return undef;
2784         }
2785         my $owner = $gcos;
2786         $owner =~ s/[,;].*$//;
2787         return to_utf8($owner);
2788 }
2789
2790 # assume that file exists
2791 sub insert_file {
2792         my $filename = shift;
2793
2794         open my $fd, '<', $filename;
2795         print map { to_utf8($_) } <$fd>;
2796         close $fd;
2797 }
2798
2799 ## ......................................................................
2800 ## mimetype related functions
2801
2802 sub mimetype_guess_file {
2803         my $filename = shift;
2804         my $mimemap = shift;
2805         -r $mimemap or return undef;
2806
2807         my %mimemap;
2808         open(my $mh, '<', $mimemap) or return undef;
2809         while (<$mh>) {
2810                 next if m/^#/; # skip comments
2811                 my ($mimetype, $exts) = split(/\t+/);
2812                 if (defined $exts) {
2813                         my @exts = split(/\s+/, $exts);
2814                         foreach my $ext (@exts) {
2815                                 $mimemap{$ext} = $mimetype;
2816                         }
2817                 }
2818         }
2819         close($mh);
2820
2821         $filename =~ /\.([^.]*)$/;
2822         return $mimemap{$1};
2823 }
2824
2825 sub mimetype_guess {
2826         my $filename = shift;
2827         my $mime;
2828         $filename =~ /\./ or return undef;
2829
2830         if ($mimetypes_file) {
2831                 my $file = $mimetypes_file;
2832                 if ($file !~ m!^/!) { # if it is relative path
2833                         # it is relative to project
2834                         $file = "$projectroot/$project/$file";
2835                 }
2836                 $mime = mimetype_guess_file($filename, $file);
2837         }
2838         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2839         return $mime;
2840 }
2841
2842 sub blob_mimetype {
2843         my $fd = shift;
2844         my $filename = shift;
2845
2846         if ($filename) {
2847                 my $mime = mimetype_guess($filename);
2848                 $mime and return $mime;
2849         }
2850
2851         # just in case
2852         return $default_blob_plain_mimetype unless $fd;
2853
2854         if (-T $fd) {
2855                 return 'text/plain';
2856         } elsif (! $filename) {
2857                 return 'application/octet-stream';
2858         } elsif ($filename =~ m/\.png$/i) {
2859                 return 'image/png';
2860         } elsif ($filename =~ m/\.gif$/i) {
2861                 return 'image/gif';
2862         } elsif ($filename =~ m/\.jpe?g$/i) {
2863                 return 'image/jpeg';
2864         } else {
2865                 return 'application/octet-stream';
2866         }
2867 }
2868
2869 sub blob_contenttype {
2870         my ($fd, $file_name, $type) = @_;
2871
2872         $type ||= blob_mimetype($fd, $file_name);
2873         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
2874                 $type .= "; charset=$default_text_plain_charset";
2875         }
2876
2877         return $type;
2878 }
2879
2880 ## ======================================================================
2881 ## functions printing HTML: header, footer, error page
2882
2883 sub git_header_html {
2884         my $status = shift || "200 OK";
2885         my $expires = shift;
2886
2887         my $title = "$site_name";
2888         if (defined $project) {
2889                 $title .= " - " . to_utf8($project);
2890                 if (defined $action) {
2891                         $title .= "/$action";
2892                         if (defined $file_name) {
2893                                 $title .= " - " . esc_path($file_name);
2894                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2895                                         $title .= "/";
2896                                 }
2897                         }
2898                 }
2899         }
2900         my $content_type;
2901         # require explicit support from the UA if we are to send the page as
2902         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2903         # we have to do this because MSIE sometimes globs '*/*', pretending to
2904         # support xhtml+xml but choking when it gets what it asked for.
2905         if (defined $cgi->http('HTTP_ACCEPT') &&
2906             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2907             $cgi->Accept('application/xhtml+xml') != 0) {
2908                 $content_type = 'application/xhtml+xml';
2909         } else {
2910                 $content_type = 'text/html';
2911         }
2912         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2913                            -status=> $status, -expires => $expires);
2914         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2915         print <<EOF;
2916 <?xml version="1.0" encoding="utf-8"?>
2917 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2918 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2919 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2920 <!-- git core binaries version $git_version -->
2921 <head>
2922 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2923 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2924 <meta name="robots" content="index, nofollow"/>
2925 <title>$title</title>
2926 EOF
2927         # the stylesheet, favicon etc urls won't work correctly with path_info
2928         # unless we set the appropriate base URL
2929         if ($ENV{'PATH_INFO'}) {
2930                 print "<base href=\"".esc_url($base_url)."\" />\n";
2931         }
2932         # print out each stylesheet that exist, providing backwards capability
2933         # for those people who defined $stylesheet in a config file
2934         if (defined $stylesheet) {
2935                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2936         } else {
2937                 foreach my $stylesheet (@stylesheets) {
2938                         next unless $stylesheet;
2939                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2940                 }
2941         }
2942         if (defined $project) {
2943                 my %href_params = get_feed_info();
2944                 if (!exists $href_params{'-title'}) {
2945                         $href_params{'-title'} = 'log';
2946                 }
2947
2948                 foreach my $format qw(RSS Atom) {
2949                         my $type = lc($format);
2950                         my %link_attr = (
2951                                 '-rel' => 'alternate',
2952                                 '-title' => "$project - $href_params{'-title'} - $format feed",
2953                                 '-type' => "application/$type+xml"
2954                         );
2955
2956                         $href_params{'action'} = $type;
2957                         $link_attr{'-href'} = href(%href_params);
2958                         print "<link ".
2959                               "rel=\"$link_attr{'-rel'}\" ".
2960                               "title=\"$link_attr{'-title'}\" ".
2961                               "href=\"$link_attr{'-href'}\" ".
2962                               "type=\"$link_attr{'-type'}\" ".
2963                               "/>\n";
2964
2965                         $href_params{'extra_options'} = '--no-merges';
2966                         $link_attr{'-href'} = href(%href_params);
2967                         $link_attr{'-title'} .= ' (no merges)';
2968                         print "<link ".
2969                               "rel=\"$link_attr{'-rel'}\" ".
2970                               "title=\"$link_attr{'-title'}\" ".
2971                               "href=\"$link_attr{'-href'}\" ".
2972                               "type=\"$link_attr{'-type'}\" ".
2973                               "/>\n";
2974                 }
2975
2976         } else {
2977                 printf('<link rel="alternate" title="%s projects list" '.
2978                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
2979                        $site_name, href(project=>undef, action=>"project_index"));
2980                 printf('<link rel="alternate" title="%s projects feeds" '.
2981                        'href="%s" type="text/x-opml" />'."\n",
2982                        $site_name, href(project=>undef, action=>"opml"));
2983         }
2984         if (defined $favicon) {
2985                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
2986         }
2987
2988         print "</head>\n" .
2989               "<body>\n";
2990
2991         if (-f $site_header) {
2992                 insert_file($site_header);
2993         }
2994
2995         print "<div class=\"page_header\">\n" .
2996               $cgi->a({-href => esc_url($logo_url),
2997                        -title => $logo_label},
2998                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2999         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3000         if (defined $project) {
3001                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3002                 if (defined $action) {
3003                         print " / $action";
3004                 }
3005                 print "\n";
3006         }
3007         print "</div>\n";
3008
3009         my $have_search = gitweb_check_feature('search');
3010         if (defined $project && $have_search) {
3011                 if (!defined $searchtext) {
3012                         $searchtext = "";
3013                 }
3014                 my $search_hash;
3015                 if (defined $hash_base) {
3016                         $search_hash = $hash_base;
3017                 } elsif (defined $hash) {
3018                         $search_hash = $hash;
3019                 } else {
3020                         $search_hash = "HEAD";
3021                 }
3022                 my $action = $my_uri;
3023                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3024                 if ($use_pathinfo) {
3025                         $action .= "/".esc_url($project);
3026                 }
3027                 print $cgi->startform(-method => "get", -action => $action) .
3028                       "<div class=\"search\">\n" .
3029                       (!$use_pathinfo &&
3030                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3031                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3032                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3033                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3034                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3035                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3036                       " search:\n",
3037                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3038                       "<span title=\"Extended regular expression\">" .
3039                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3040                                      -checked => $search_use_regexp) .
3041                       "</span>" .
3042                       "</div>" .
3043                       $cgi->end_form() . "\n";
3044         }
3045 }
3046
3047 sub git_footer_html {
3048         my $feed_class = 'rss_logo';
3049
3050         print "<div class=\"page_footer\">\n";
3051         if (defined $project) {
3052                 my $descr = git_get_project_description($project);
3053                 if (defined $descr) {
3054                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3055                 }
3056
3057                 my %href_params = get_feed_info();
3058                 if (!%href_params) {
3059                         $feed_class .= ' generic';
3060                 }
3061                 $href_params{'-title'} ||= 'log';
3062
3063                 foreach my $format qw(RSS Atom) {
3064                         $href_params{'action'} = lc($format);
3065                         print $cgi->a({-href => href(%href_params),
3066                                       -title => "$href_params{'-title'} $format feed",
3067                                       -class => $feed_class}, $format)."\n";
3068                 }
3069
3070         } else {
3071                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3072                               -class => $feed_class}, "OPML") . " ";
3073                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3074                               -class => $feed_class}, "TXT") . "\n";
3075         }
3076         print "</div>\n"; # class="page_footer"
3077
3078         if (-f $site_footer) {
3079                 insert_file($site_footer);
3080         }
3081
3082         print "</body>\n" .
3083               "</html>";
3084 }
3085
3086 # die_error(<http_status_code>, <error_message>)
3087 # Example: die_error(404, 'Hash not found')
3088 # By convention, use the following status codes (as defined in RFC 2616):
3089 # 400: Invalid or missing CGI parameters, or
3090 #      requested object exists but has wrong type.
3091 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3092 #      this server or project.
3093 # 404: Requested object/revision/project doesn't exist.
3094 # 500: The server isn't configured properly, or
3095 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3096 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3097 sub die_error {
3098         my $status = shift || 500;
3099         my $error = shift || "Internal server error";
3100
3101         my %http_responses = (400 => '400 Bad Request',
3102                               403 => '403 Forbidden',
3103                               404 => '404 Not Found',
3104                               500 => '500 Internal Server Error');
3105         git_header_html($http_responses{$status});
3106         print <<EOF;
3107 <div class="page_body">
3108 <br /><br />
3109 $status - $error
3110 <br />
3111 </div>
3112 EOF
3113         git_footer_html();
3114         exit;
3115 }
3116
3117 ## ----------------------------------------------------------------------
3118 ## functions printing or outputting HTML: navigation
3119
3120 sub git_print_page_nav {
3121         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3122         $extra = '' if !defined $extra; # pager or formats
3123
3124         my @navs = qw(summary shortlog log commit commitdiff tree);
3125         if ($suppress) {
3126                 @navs = grep { $_ ne $suppress } @navs;
3127         }
3128
3129         my %arg = map { $_ => {action=>$_} } @navs;
3130         if (defined $head) {
3131                 for (qw(commit commitdiff)) {
3132                         $arg{$_}{'hash'} = $head;
3133                 }
3134                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3135                         for (qw(shortlog log)) {
3136                                 $arg{$_}{'hash'} = $head;
3137                         }
3138                 }
3139         }
3140
3141         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3142         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3143
3144         my @actions = gitweb_get_feature('actions');
3145         my %repl = (
3146                 '%' => '%',
3147                 'n' => $project,         # project name
3148                 'f' => $git_dir,         # project path within filesystem
3149                 'h' => $treehead || '',  # current hash ('h' parameter)
3150                 'b' => $treebase || '',  # hash base ('hb' parameter)
3151         );
3152         while (@actions) {
3153                 my ($label, $link, $pos) = splice(@actions,0,3);
3154                 # insert
3155                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3156                 # munch munch
3157                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3158                 $arg{$label}{'_href'} = $link;
3159         }
3160
3161         print "<div class=\"page_nav\">\n" .
3162                 (join " | ",
3163                  map { $_ eq $current ?
3164                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3165                  } @navs);
3166         print "<br/>\n$extra<br/>\n" .
3167               "</div>\n";
3168 }
3169
3170 sub format_paging_nav {
3171         my ($action, $hash, $head, $page, $has_next_link) = @_;
3172         my $paging_nav;
3173
3174
3175         if ($hash ne $head || $page) {
3176                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3177         } else {
3178                 $paging_nav .= "HEAD";
3179         }
3180
3181         if ($page > 0) {
3182                 $paging_nav .= " &sdot; " .
3183                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3184                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3185         } else {
3186                 $paging_nav .= " &sdot; prev";
3187         }
3188
3189         if ($has_next_link) {
3190                 $paging_nav .= " &sdot; " .
3191                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3192                                  -accesskey => "n", -title => "Alt-n"}, "next");
3193         } else {
3194                 $paging_nav .= " &sdot; next";
3195         }
3196
3197         return $paging_nav;
3198 }
3199
3200 ## ......................................................................
3201 ## functions printing or outputting HTML: div
3202
3203 sub git_print_header_div {
3204         my ($action, $title, $hash, $hash_base) = @_;
3205         my %args = ();
3206
3207         $args{'action'} = $action;
3208         $args{'hash'} = $hash if $hash;
3209         $args{'hash_base'} = $hash_base if $hash_base;
3210
3211         print "<div class=\"header\">\n" .
3212               $cgi->a({-href => href(%args), -class => "title"},
3213               $title ? $title : $action) .
3214               "\n</div>\n";
3215 }
3216
3217 sub git_print_authorship {
3218         my $co = shift;
3219
3220         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3221         print "<div class=\"author_date\">" .
3222               esc_html($co->{'author_name'}) .
3223               " [$ad{'rfc2822'}";
3224         if ($ad{'hour_local'} < 6) {
3225                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3226                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3227         } else {
3228                 printf(" (%02d:%02d %s)",
3229                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3230         }
3231         print "]</div>\n";
3232 }
3233
3234 sub git_print_page_path {
3235         my $name = shift;
3236         my $type = shift;
3237         my $hb = shift;
3238
3239
3240         print "<div class=\"page_path\">";
3241         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3242                       -title => 'tree root'}, to_utf8("[$project]"));
3243         print " / ";
3244         if (defined $name) {
3245                 my @dirname = split '/', $name;
3246                 my $basename = pop @dirname;
3247                 my $fullname = '';
3248
3249                 foreach my $dir (@dirname) {
3250                         $fullname .= ($fullname ? '/' : '') . $dir;
3251                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3252                                                      hash_base=>$hb),
3253                                       -title => $fullname}, esc_path($dir));
3254                         print " / ";
3255                 }
3256                 if (defined $type && $type eq 'blob') {
3257                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3258                                                      hash_base=>$hb),
3259                                       -title => $name}, esc_path($basename));
3260                 } elsif (defined $type && $type eq 'tree') {
3261                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3262                                                      hash_base=>$hb),
3263                                       -title => $name}, esc_path($basename));
3264                         print " / ";
3265                 } else {
3266                         print esc_path($basename);
3267                 }
3268         }
3269         print "<br/></div>\n";
3270 }
3271
3272 sub git_print_log {
3273         my $log = shift;
3274         my %opts = @_;
3275
3276         if ($opts{'-remove_title'}) {
3277                 # remove title, i.e. first line of log
3278                 shift @$log;
3279         }
3280         # remove leading empty lines
3281         while (defined $log->[0] && $log->[0] eq "") {
3282                 shift @$log;
3283         }
3284
3285         # print log
3286         my $signoff = 0;
3287         my $empty = 0;
3288         foreach my $line (@$log) {
3289                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3290                         $signoff = 1;
3291                         $empty = 0;
3292                         if (! $opts{'-remove_signoff'}) {
3293                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3294                                 next;
3295                         } else {
3296                                 # remove signoff lines
3297                                 next;
3298                         }
3299                 } else {
3300                         $signoff = 0;
3301                 }
3302
3303                 # print only one empty line
3304                 # do not print empty line after signoff
3305                 if ($line eq "") {
3306                         next if ($empty || $signoff);
3307                         $empty = 1;
3308                 } else {
3309                         $empty = 0;
3310                 }
3311
3312                 print format_log_line_html($line) . "<br/>\n";
3313         }
3314
3315         if ($opts{'-final_empty_line'}) {
3316                 # end with single empty line
3317                 print "<br/>\n" unless $empty;
3318         }
3319 }
3320
3321 # return link target (what link points to)
3322 sub git_get_link_target {
3323         my $hash = shift;
3324         my $link_target;
3325
3326         # read link
3327         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3328                 or return;
3329         {
3330                 local $/ = undef;
3331                 $link_target = <$fd>;
3332         }
3333         close $fd
3334                 or return;
3335
3336         return $link_target;
3337 }
3338
3339 # given link target, and the directory (basedir) the link is in,
3340 # return target of link relative to top directory (top tree);
3341 # return undef if it is not possible (including absolute links).
3342 sub normalize_link_target {
3343         my ($link_target, $basedir, $hash_base) = @_;
3344
3345         # we can normalize symlink target only if $hash_base is provided
3346         return unless $hash_base;
3347
3348         # absolute symlinks (beginning with '/') cannot be normalized
3349         return if (substr($link_target, 0, 1) eq '/');
3350
3351         # normalize link target to path from top (root) tree (dir)
3352         my $path;
3353         if ($basedir) {
3354                 $path = $basedir . '/' . $link_target;
3355         } else {
3356                 # we are in top (root) tree (dir)
3357                 $path = $link_target;
3358         }
3359
3360         # remove //, /./, and /../
3361         my @path_parts;
3362         foreach my $part (split('/', $path)) {
3363                 # discard '.' and ''
3364                 next if (!$part || $part eq '.');
3365                 # handle '..'
3366                 if ($part eq '..') {
3367                         if (@path_parts) {
3368                                 pop @path_parts;
3369                         } else {
3370                                 # link leads outside repository (outside top dir)
3371                                 return;
3372                         }
3373                 } else {
3374                         push @path_parts, $part;
3375                 }
3376         }
3377         $path = join('/', @path_parts);
3378
3379         return $path;
3380 }
3381
3382 # print tree entry (row of git_tree), but without encompassing <tr> element
3383 sub git_print_tree_entry {
3384         my ($t, $basedir, $hash_base, $have_blame) = @_;
3385
3386         my %base_key = ();
3387         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3388
3389         # The format of a table row is: mode list link.  Where mode is
3390         # the mode of the entry, list is the name of the entry, an href,
3391         # and link is the action links of the entry.
3392
3393         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3394         if ($t->{'type'} eq "blob") {
3395                 print "<td class=\"list\">" .
3396                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3397                                                file_name=>"$basedir$t->{'name'}", %base_key),
3398                                 -class => "list"}, esc_path($t->{'name'}));
3399                 if (S_ISLNK(oct $t->{'mode'})) {
3400                         my $link_target = git_get_link_target($t->{'hash'});
3401                         if ($link_target) {
3402                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
3403                                 if (defined $norm_target) {
3404                                         print " -> " .
3405                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3406                                                                      file_name=>$norm_target),
3407                                                        -title => $norm_target}, esc_path($link_target));
3408                                 } else {
3409                                         print " -> " . esc_path($link_target);
3410                                 }
3411                         }
3412                 }
3413                 print "</td>\n";
3414                 print "<td class=\"link\">";
3415                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3416                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3417                               "blob");
3418                 if ($have_blame) {
3419                         print " | " .
3420                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3421                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3422                                       "blame");
3423                 }
3424                 if (defined $hash_base) {
3425                         print " | " .
3426                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3427                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3428                                       "history");
3429                 }
3430                 print " | " .
3431                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3432                                                file_name=>"$basedir$t->{'name'}")},
3433                                 "raw");
3434                 print "</td>\n";
3435
3436         } elsif ($t->{'type'} eq "tree") {
3437                 print "<td class=\"list\">";
3438                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3439                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3440                               esc_path($t->{'name'}));
3441                 print "</td>\n";
3442                 print "<td class=\"link\">";
3443                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3444                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3445                               "tree");
3446                 if (defined $hash_base) {
3447                         print " | " .
3448                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3449                                                      file_name=>"$basedir$t->{'name'}")},
3450                                       "history");
3451                 }
3452                 print "</td>\n";
3453         } else {
3454                 # unknown object: we can only present history for it
3455                 # (this includes 'commit' object, i.e. submodule support)
3456                 print "<td class=\"list\">" .
3457                       esc_path($t->{'name'}) .
3458                       "</td>\n";
3459                 print "<td class=\"link\">";
3460                 if (defined $hash_base) {
3461                         print $cgi->a({-href => href(action=>"history",
3462                                                      hash_base=>$hash_base,
3463                                                      file_name=>"$basedir$t->{'name'}")},
3464                                       "history");
3465                 }
3466                 print "</td>\n";
3467         }
3468 }
3469
3470 ## ......................................................................
3471 ## functions printing large fragments of HTML
3472
3473 # get pre-image filenames for merge (combined) diff
3474 sub fill_from_file_info {
3475         my ($diff, @parents) = @_;
3476
3477         $diff->{'from_file'} = [ ];
3478         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3479         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3480                 if ($diff->{'status'}[$i] eq 'R' ||
3481                     $diff->{'status'}[$i] eq 'C') {
3482                         $diff->{'from_file'}[$i] =
3483                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3484                 }
3485         }
3486
3487         return $diff;
3488 }
3489
3490 # is current raw difftree line of file deletion
3491 sub is_deleted {
3492         my $diffinfo = shift;
3493
3494         return $diffinfo->{'to_id'} eq ('0' x 40);
3495 }
3496
3497 # does patch correspond to [previous] difftree raw line
3498 # $diffinfo  - hashref of parsed raw diff format
3499 # $patchinfo - hashref of parsed patch diff format
3500 #              (the same keys as in $diffinfo)
3501 sub is_patch_split {
3502         my ($diffinfo, $patchinfo) = @_;
3503
3504         return defined $diffinfo && defined $patchinfo
3505                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3506 }
3507
3508
3509 sub git_difftree_body {
3510         my ($difftree, $hash, @parents) = @_;
3511         my ($parent) = $parents[0];
3512         my $have_blame = gitweb_check_feature('blame');
3513         print "<div class=\"list_head\">\n";
3514         if ($#{$difftree} > 10) {
3515                 print(($#{$difftree} + 1) . " files changed:\n");
3516         }
3517         print "</div>\n";
3518
3519         print "<table class=\"" .
3520               (@parents > 1 ? "combined " : "") .
3521               "diff_tree\">\n";
3522
3523         # header only for combined diff in 'commitdiff' view
3524         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3525         if ($has_header) {
3526                 # table header
3527                 print "<thead><tr>\n" .
3528                        "<th></th><th></th>\n"; # filename, patchN link
3529                 for (my $i = 0; $i < @parents; $i++) {
3530                         my $par = $parents[$i];
3531                         print "<th>" .
3532                               $cgi->a({-href => href(action=>"commitdiff",
3533                                                      hash=>$hash, hash_parent=>$par),
3534                                        -title => 'commitdiff to parent number ' .
3535                                                   ($i+1) . ': ' . substr($par,0,7)},
3536                                       $i+1) .
3537                               "&nbsp;</th>\n";
3538                 }
3539                 print "</tr></thead>\n<tbody>\n";
3540         }
3541
3542         my $alternate = 1;
3543         my $patchno = 0;
3544         foreach my $line (@{$difftree}) {
3545                 my $diff = parsed_difftree_line($line);
3546
3547                 if ($alternate) {
3548                         print "<tr class=\"dark\">\n";
3549                 } else {
3550                         print "<tr class=\"light\">\n";
3551                 }
3552                 $alternate ^= 1;
3553
3554                 if (exists $diff->{'nparents'}) { # combined diff
3555
3556                         fill_from_file_info($diff, @parents)
3557                                 unless exists $diff->{'from_file'};
3558
3559                         if (!is_deleted($diff)) {
3560                                 # file exists in the result (child) commit
3561                                 print "<td>" .
3562                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3563                                                              file_name=>$diff->{'to_file'},
3564                                                              hash_base=>$hash),
3565                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3566                                       "</td>\n";
3567                         } else {
3568                                 print "<td>" .
3569                                       esc_path($diff->{'to_file'}) .
3570                                       "</td>\n";
3571                         }
3572
3573                         if ($action eq 'commitdiff') {
3574                                 # link to patch
3575                                 $patchno++;
3576                                 print "<td class=\"link\">" .
3577                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3578                                       " | " .
3579                                       "</td>\n";
3580                         }
3581
3582                         my $has_history = 0;
3583                         my $not_deleted = 0;
3584                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3585                                 my $hash_parent = $parents[$i];
3586                                 my $from_hash = $diff->{'from_id'}[$i];
3587                                 my $from_path = $diff->{'from_file'}[$i];
3588                                 my $status = $diff->{'status'}[$i];
3589
3590                                 $has_history ||= ($status ne 'A');
3591                                 $not_deleted ||= ($status ne 'D');
3592
3593                                 if ($status eq 'A') {
3594                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3595                                 } elsif ($status eq 'D') {
3596                                         print "<td class=\"link\">" .
3597                                               $cgi->a({-href => href(action=>"blob",
3598                                                                      hash_base=>$hash,
3599                                                                      hash=>$from_hash,
3600                                                                      file_name=>$from_path)},
3601                                                       "blob" . ($i+1)) .
3602                                               " | </td>\n";
3603                                 } else {
3604                                         if ($diff->{'to_id'} eq $from_hash) {
3605                                                 print "<td class=\"link nochange\">";
3606                                         } else {
3607                                                 print "<td class=\"link\">";
3608                                         }
3609                                         print $cgi->a({-href => href(action=>"blobdiff",
3610                                                                      hash=>$diff->{'to_id'},
3611                                                                      hash_parent=>$from_hash,
3612                                                                      hash_base=>$hash,
3613                                                                      hash_parent_base=>$hash_parent,
3614                                                                      file_name=>$diff->{'to_file'},
3615                                                                      file_parent=>$from_path)},
3616                                                       "diff" . ($i+1)) .
3617                                               " | </td>\n";
3618                                 }
3619                         }
3620
3621                         print "<td class=\"link\">";
3622                         if ($not_deleted) {
3623                                 print $cgi->a({-href => href(action=>"blob",
3624                                                              hash=>$diff->{'to_id'},
3625                                                              file_name=>$diff->{'to_file'},
3626                                                              hash_base=>$hash)},
3627                                               "blob");
3628                                 print " | " if ($has_history);
3629                         }
3630                         if ($has_history) {
3631                                 print $cgi->a({-href => href(action=>"history",
3632                                                              file_name=>$diff->{'to_file'},
3633                                                              hash_base=>$hash)},
3634                                               "history");
3635                         }
3636                         print "</td>\n";
3637
3638                         print "</tr>\n";
3639                         next; # instead of 'else' clause, to avoid extra indent
3640                 }
3641                 # else ordinary diff
3642
3643                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3644                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3645                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3646                         $to_mode_oct = oct $diff->{'to_mode'};
3647                         if (S_ISREG($to_mode_oct)) { # only for regular file
3648                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3649                         }
3650                         $to_file_type = file_type($diff->{'to_mode'});
3651                 }
3652                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3653                         $from_mode_oct = oct $diff->{'from_mode'};
3654                         if (S_ISREG($to_mode_oct)) { # only for regular file
3655                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3656                         }
3657                         $from_file_type = file_type($diff->{'from_mode'});
3658                 }
3659
3660                 if ($diff->{'status'} eq "A") { # created
3661                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3662                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3663                         $mode_chng   .= "]</span>";
3664                         print "<td>";
3665                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3666                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3667                                       -class => "list"}, esc_path($diff->{'file'}));
3668                         print "</td>\n";
3669                         print "<td>$mode_chng</td>\n";
3670                         print "<td class=\"link\">";
3671                         if ($action eq 'commitdiff') {
3672                                 # link to patch
3673                                 $patchno++;
3674                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3675                                 print " | ";
3676                         }
3677                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3678                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3679                                       "blob");
3680                         print "</td>\n";
3681
3682                 } elsif ($diff->{'status'} eq "D") { # deleted
3683                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3684                         print "<td>";
3685                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3686                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3687                                        -class => "list"}, esc_path($diff->{'file'}));
3688                         print "</td>\n";
3689                         print "<td>$mode_chng</td>\n";
3690                         print "<td class=\"link\">";
3691                         if ($action eq 'commitdiff') {
3692                                 # link to patch
3693                                 $patchno++;
3694                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3695                                 print " | ";
3696                         }
3697                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3698                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3699                                       "blob") . " | ";
3700                         if ($have_blame) {
3701                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3702                                                              file_name=>$diff->{'file'})},
3703                                               "blame") . " | ";
3704                         }
3705                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3706                                                      file_name=>$diff->{'file'})},
3707                                       "history");
3708                         print "</td>\n";
3709
3710                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3711                         my $mode_chnge = "";
3712                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3713                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3714                                 if ($from_file_type ne $to_file_type) {
3715                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3716                                 }
3717                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3718                                         if ($from_mode_str && $to_mode_str) {
3719                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3720                                         } elsif ($to_mode_str) {
3721                                                 $mode_chnge .= " mode: $to_mode_str";
3722                                         }
3723                                 }
3724                                 $mode_chnge .= "]</span>\n";
3725                         }
3726                         print "<td>";
3727                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3728                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3729                                       -class => "list"}, esc_path($diff->{'file'}));
3730                         print "</td>\n";
3731                         print "<td>$mode_chnge</td>\n";
3732                         print "<td class=\"link\">";
3733                         if ($action eq 'commitdiff') {
3734                                 # link to patch
3735                                 $patchno++;
3736                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3737                                       " | ";
3738                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3739                                 # "commit" view and modified file (not onlu mode changed)
3740                                 print $cgi->a({-href => href(action=>"blobdiff",
3741                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3742                                                              hash_base=>$hash, hash_parent_base=>$parent,
3743                                                              file_name=>$diff->{'file'})},
3744                                               "diff") .
3745                                       " | ";
3746                         }
3747                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3748                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3749                                        "blob") . " | ";
3750                         if ($have_blame) {
3751                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3752                                                              file_name=>$diff->{'file'})},
3753                                               "blame") . " | ";
3754                         }
3755                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3756                                                      file_name=>$diff->{'file'})},
3757                                       "history");
3758                         print "</td>\n";
3759
3760                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3761                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3762                         my $nstatus = $status_name{$diff->{'status'}};
3763                         my $mode_chng = "";
3764                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3765                                 # mode also for directories, so we cannot use $to_mode_str
3766                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3767                         }
3768                         print "<td>" .
3769                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3770                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3771                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3772                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3773                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3774                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3775                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3776                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3777                               "<td class=\"link\">";
3778                         if ($action eq 'commitdiff') {
3779                                 # link to patch
3780                                 $patchno++;
3781                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3782                                       " | ";
3783                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3784                                 # "commit" view and modified file (not only pure rename or copy)
3785                                 print $cgi->a({-href => href(action=>"blobdiff",
3786                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3787                                                              hash_base=>$hash, hash_parent_base=>$parent,
3788                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3789                                               "diff") .
3790                                       " | ";
3791                         }
3792                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3793                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3794                                       "blob") . " | ";
3795                         if ($have_blame) {
3796                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3797                                                              file_name=>$diff->{'to_file'})},
3798                                               "blame") . " | ";
3799                         }
3800                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3801                                                     file_name=>$diff->{'to_file'})},
3802                                       "history");
3803                         print "</td>\n";
3804
3805                 } # we should not encounter Unmerged (U) or Unknown (X) status
3806                 print "</tr>\n";
3807         }
3808         print "</tbody>" if $has_header;
3809         print "</table>\n";
3810 }
3811
3812 sub git_patchset_body {
3813         my ($fd, $difftree, $hash, @hash_parents) = @_;
3814         my ($hash_parent) = $hash_parents[0];
3815
3816         my $is_combined = (@hash_parents > 1);
3817         my $patch_idx = 0;
3818         my $patch_number = 0;
3819         my $patch_line;
3820         my $diffinfo;
3821         my $to_name;
3822         my (%from, %to);
3823
3824         print "<div class=\"patchset\">\n";
3825
3826         # skip to first patch
3827         while ($patch_line = <$fd>) {
3828                 chomp $patch_line;
3829
3830                 last if ($patch_line =~ m/^diff /);
3831         }
3832
3833  PATCH:
3834         while ($patch_line) {
3835
3836                 # parse "git diff" header line
3837                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3838                         # $1 is from_name, which we do not use
3839                         $to_name = unquote($2);
3840                         $to_name =~ s!^b/!!;
3841                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3842                         # $1 is 'cc' or 'combined', which we do not use
3843                         $to_name = unquote($2);
3844                 } else {
3845                         $to_name = undef;
3846                 }
3847
3848                 # check if current patch belong to current raw line
3849                 # and parse raw git-diff line if needed
3850                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3851                         # this is continuation of a split patch
3852                         print "<div class=\"patch cont\">\n";
3853                 } else {
3854                         # advance raw git-diff output if needed
3855                         $patch_idx++ if defined $diffinfo;
3856
3857                         # read and prepare patch information
3858                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3859
3860                         # compact combined diff output can have some patches skipped
3861                         # find which patch (using pathname of result) we are at now;
3862                         if ($is_combined) {
3863                                 while ($to_name ne $diffinfo->{'to_file'}) {
3864                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3865                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3866                                               "</div>\n";  # class="patch"
3867
3868                                         $patch_idx++;
3869                                         $patch_number++;
3870
3871                                         last if $patch_idx > $#$difftree;
3872                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3873                                 }
3874                         }
3875
3876                         # modifies %from, %to hashes
3877                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3878
3879                         # this is first patch for raw difftree line with $patch_idx index
3880                         # we index @$difftree array from 0, but number patches from 1
3881                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3882                 }
3883
3884                 # git diff header
3885                 #assert($patch_line =~ m/^diff /) if DEBUG;
3886                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3887                 $patch_number++;
3888                 # print "git diff" header
3889                 print format_git_diff_header_line($patch_line, $diffinfo,
3890                                                   \%from, \%to);
3891
3892                 # print extended diff header
3893                 print "<div class=\"diff extended_header\">\n";
3894         EXTENDED_HEADER:
3895                 while ($patch_line = <$fd>) {
3896                         chomp $patch_line;
3897
3898                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3899
3900                         print format_extended_diff_header_line($patch_line, $diffinfo,
3901                                                                \%from, \%to);
3902                 }
3903                 print "</div>\n"; # class="diff extended_header"
3904
3905                 # from-file/to-file diff header
3906                 if (! $patch_line) {
3907                         print "</div>\n"; # class="patch"
3908                         last PATCH;
3909                 }
3910                 next PATCH if ($patch_line =~ m/^diff /);
3911                 #assert($patch_line =~ m/^---/) if DEBUG;
3912
3913                 my $last_patch_line = $patch_line;
3914                 $patch_line = <$fd>;
3915                 chomp $patch_line;
3916                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3917
3918                 print format_diff_from_to_header($last_patch_line, $patch_line,
3919                                                  $diffinfo, \%from, \%to,
3920                                                  @hash_parents);
3921
3922                 # the patch itself
3923         LINE:
3924                 while ($patch_line = <$fd>) {
3925                         chomp $patch_line;
3926
3927                         next PATCH if ($patch_line =~ m/^diff /);
3928
3929                         print format_diff_line($patch_line, \%from, \%to);
3930                 }
3931
3932         } continue {
3933                 print "</div>\n"; # class="patch"
3934         }
3935
3936         # for compact combined (--cc) format, with chunk and patch simpliciaction
3937         # patchset might be empty, but there might be unprocessed raw lines
3938         for (++$patch_idx if $patch_number > 0;
3939              $patch_idx < @$difftree;
3940              ++$patch_idx) {
3941                 # read and prepare patch information
3942                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3943
3944                 # generate anchor for "patch" links in difftree / whatchanged part
3945                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3946                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3947                       "</div>\n";  # class="patch"
3948
3949                 $patch_number++;
3950         }
3951
3952         if ($patch_number == 0) {
3953                 if (@hash_parents > 1) {
3954                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3955                 } else {
3956                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3957                 }
3958         }
3959
3960         print "</div>\n"; # class="patchset"
3961 }
3962
3963 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3964
3965 # fills project list info (age, description, owner, forks) for each
3966 # project in the list, removing invalid projects from returned list
3967 # NOTE: modifies $projlist, but does not remove entries from it
3968 sub fill_project_list_info {
3969         my ($projlist, $check_forks) = @_;
3970         my @projects;
3971
3972         my $show_ctags = gitweb_check_feature('ctags');
3973  PROJECT:
3974         foreach my $pr (@$projlist) {
3975                 my (@activity) = git_get_last_activity($pr->{'path'});
3976                 unless (@activity) {
3977                         next PROJECT;
3978                 }
3979                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
3980                 if (!defined $pr->{'descr'}) {
3981                         my $descr = git_get_project_description($pr->{'path'}) || "";
3982                         $descr = to_utf8($descr);
3983                         $pr->{'descr_long'} = $descr;
3984                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3985                 }
3986                 if (!defined $pr->{'owner'}) {
3987                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3988                 }
3989                 if ($check_forks) {
3990                         my $pname = $pr->{'path'};
3991                         if (($pname =~ s/\.git$//) &&
3992                             ($pname !~ /\/$/) &&
3993                             (-d "$projectroot/$pname")) {
3994                                 $pr->{'forks'} = "-d $projectroot/$pname";
3995                         } else {
3996                                 $pr->{'forks'} = 0;
3997                         }
3998                 }
3999                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4000                 push @projects, $pr;
4001         }
4002
4003         return @projects;
4004 }
4005
4006 # print 'sort by' <th> element, generating 'sort by $name' replay link
4007 # if that order is not selected
4008 sub print_sort_th {
4009         my ($name, $order, $header) = @_;
4010         $header ||= ucfirst($name);
4011
4012         if ($order eq $name) {
4013                 print "<th>$header</th>\n";
4014         } else {
4015                 print "<th>" .
4016                       $cgi->a({-href => href(-replay=>1, order=>$name),
4017                                -class => "header"}, $header) .
4018                       "</th>\n";
4019         }
4020 }
4021
4022 sub git_project_list_body {
4023         # actually uses global variable $project
4024         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4025
4026         my $check_forks = gitweb_check_feature('forks');
4027         my @projects = fill_project_list_info($projlist, $check_forks);
4028
4029         $order ||= $default_projects_order;
4030         $from = 0 unless defined $from;
4031         $to = $#projects if (!defined $to || $#projects < $to);
4032
4033         my %order_info = (
4034                 project => { key => 'path', type => 'str' },
4035                 descr => { key => 'descr_long', type => 'str' },
4036                 owner => { key => 'owner', type => 'str' },
4037                 age => { key => 'age', type => 'num' }
4038         );
4039         my $oi = $order_info{$order};
4040         if ($oi->{'type'} eq 'str') {
4041                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4042         } else {
4043                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4044         }
4045
4046         my $show_ctags = gitweb_check_feature('ctags');
4047         if ($show_ctags) {
4048                 my %ctags;
4049                 foreach my $p (@projects) {
4050                         foreach my $ct (keys %{$p->{'ctags'}}) {
4051                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4052                         }
4053                 }
4054                 my $cloud = git_populate_project_tagcloud(\%ctags);
4055                 print git_show_project_tagcloud($cloud, 64);
4056         }
4057
4058         print "<table class=\"project_list\">\n";
4059         unless ($no_header) {
4060                 print "<tr>\n";
4061                 if ($check_forks) {
4062                         print "<th></th>\n";
4063                 }
4064                 print_sort_th('project', $order, 'Project');
4065                 print_sort_th('descr', $order, 'Description');
4066                 print_sort_th('owner', $order, 'Owner');
4067                 print_sort_th('age', $order, 'Last Change');
4068                 print "<th></th>\n" . # for links
4069                       "</tr>\n";
4070         }
4071         my $alternate = 1;
4072         my $tagfilter = $cgi->param('by_tag');
4073         for (my $i = $from; $i <= $to; $i++) {
4074                 my $pr = $projects[$i];
4075
4076                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4077                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4078                         and not $pr->{'descr_long'} =~ /$searchtext/;
4079                 # Weed out forks or non-matching entries of search
4080                 if ($check_forks) {
4081                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4082                         $forkbase="^$forkbase" if $forkbase;
4083                         next if not $searchtext and not $tagfilter and $show_ctags
4084                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4085                 }
4086
4087                 if ($alternate) {
4088                         print "<tr class=\"dark\">\n";
4089                 } else {
4090                         print "<tr class=\"light\">\n";
4091                 }
4092                 $alternate ^= 1;
4093                 if ($check_forks) {
4094                         print "<td>";
4095                         if ($pr->{'forks'}) {
4096                                 print "<!-- $pr->{'forks'} -->\n";
4097                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4098                         }
4099                         print "</td>\n";
4100                 }
4101                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4102                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4103                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4104                                         -class => "list", -title => $pr->{'descr_long'}},
4105                                         esc_html($pr->{'descr'})) . "</td>\n" .
4106                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4107                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4108                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4109                       "<td class=\"link\">" .
4110                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4111                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4112                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4113                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4114                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4115                       "</td>\n" .
4116                       "</tr>\n";
4117         }
4118         if (defined $extra) {
4119                 print "<tr>\n";
4120                 if ($check_forks) {
4121                         print "<td></td>\n";
4122                 }
4123                 print "<td colspan=\"5\">$extra</td>\n" .
4124                       "</tr>\n";
4125         }
4126         print "</table>\n";
4127 }
4128
4129 sub git_shortlog_body {
4130         # uses global variable $project
4131         my ($commitlist, $from, $to, $refs, $extra) = @_;
4132
4133         $from = 0 unless defined $from;
4134         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4135
4136         print "<table class=\"shortlog\">\n";
4137         my $alternate = 1;
4138         for (my $i = $from; $i <= $to; $i++) {
4139                 my %co = %{$commitlist->[$i]};
4140                 my $commit = $co{'id'};
4141                 my $ref = format_ref_marker($refs, $commit);
4142                 if ($alternate) {
4143                         print "<tr class=\"dark\">\n";
4144                 } else {
4145                         print "<tr class=\"light\">\n";
4146                 }
4147                 $alternate ^= 1;
4148                 my $author = chop_and_escape_str($co{'author_name'}, 10);
4149                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4150                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4151                       "<td><i>" . $author . "</i></td>\n" .
4152                       "<td>";
4153                 print format_subject_html($co{'title'}, $co{'title_short'},
4154                                           href(action=>"commit", hash=>$commit), $ref);
4155                 print "</td>\n" .
4156                       "<td class=\"link\">" .
4157                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4158                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4159                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4160                 my $snapshot_links = format_snapshot_links($commit);
4161                 if (defined $snapshot_links) {
4162                         print " | " . $snapshot_links;
4163                 }
4164                 print "</td>\n" .
4165                       "</tr>\n";
4166         }
4167         if (defined $extra) {
4168                 print "<tr>\n" .
4169                       "<td colspan=\"4\">$extra</td>\n" .
4170                       "</tr>\n";
4171         }
4172         print "</table>\n";
4173 }
4174
4175 sub git_history_body {
4176         # Warning: assumes constant type (blob or tree) during history
4177         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4178
4179         $from = 0 unless defined $from;
4180         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4181
4182         print "<table class=\"history\">\n";
4183         my $alternate = 1;
4184         for (my $i = $from; $i <= $to; $i++) {
4185                 my %co = %{$commitlist->[$i]};
4186                 if (!%co) {
4187                         next;
4188                 }
4189                 my $commit = $co{'id'};
4190
4191                 my $ref = format_ref_marker($refs, $commit);
4192
4193                 if ($alternate) {
4194                         print "<tr class=\"dark\">\n";
4195                 } else {
4196                         print "<tr class=\"light\">\n";
4197                 }
4198                 $alternate ^= 1;
4199         # shortlog uses      chop_str($co{'author_name'}, 10)
4200                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
4201                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4202                       "<td><i>" . $author . "</i></td>\n" .
4203                       "<td>";
4204                 # originally git_history used chop_str($co{'title'}, 50)
4205                 print format_subject_html($co{'title'}, $co{'title_short'},
4206                                           href(action=>"commit", hash=>$commit), $ref);
4207                 print "</td>\n" .
4208                       "<td class=\"link\">" .
4209                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4210                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4211
4212                 if ($ftype eq 'blob') {
4213                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4214                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4215                         if (defined $blob_current && defined $blob_parent &&
4216                                         $blob_current ne $blob_parent) {
4217                                 print " | " .
4218                                         $cgi->a({-href => href(action=>"blobdiff",
4219                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4220                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4221                                                                file_name=>$file_name)},
4222                                                 "diff to current");
4223                         }
4224                 }
4225                 print "</td>\n" .
4226                       "</tr>\n";
4227         }
4228         if (defined $extra) {
4229                 print "<tr>\n" .
4230                       "<td colspan=\"4\">$extra</td>\n" .
4231                       "</tr>\n";
4232         }
4233         print "</table>\n";
4234 }
4235
4236 sub git_tags_body {
4237         # uses global variable $project
4238         my ($taglist, $from, $to, $extra) = @_;
4239         $from = 0 unless defined $from;
4240         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4241
4242         print "<table class=\"tags\">\n";
4243         my $alternate = 1;
4244         for (my $i = $from; $i <= $to; $i++) {
4245                 my $entry = $taglist->[$i];
4246                 my %tag = %$entry;
4247                 my $comment = $tag{'subject'};
4248                 my $comment_short;
4249                 if (defined $comment) {
4250                         $comment_short = chop_str($comment, 30, 5);
4251                 }
4252                 if ($alternate) {
4253                         print "<tr class=\"dark\">\n";
4254                 } else {
4255                         print "<tr class=\"light\">\n";
4256                 }
4257                 $alternate ^= 1;
4258                 if (defined $tag{'age'}) {
4259                         print "<td><i>$tag{'age'}</i></td>\n";
4260                 } else {
4261                         print "<td></td>\n";
4262                 }
4263                 print "<td>" .
4264                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4265                                -class => "list name"}, esc_html($tag{'name'})) .
4266                       "</td>\n" .
4267                       "<td>";
4268                 if (defined $comment) {
4269                         print format_subject_html($comment, $comment_short,
4270                                                   href(action=>"tag", hash=>$tag{'id'}));
4271                 }
4272                 print "</td>\n" .
4273                       "<td class=\"selflink\">";
4274                 if ($tag{'type'} eq "tag") {
4275                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4276                 } else {
4277                         print "&nbsp;";
4278                 }
4279                 print "</td>\n" .
4280                       "<td class=\"link\">" . " | " .
4281                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4282                 if ($tag{'reftype'} eq "commit") {
4283                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4284                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4285                 } elsif ($tag{'reftype'} eq "blob") {
4286                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4287                 }
4288                 print "</td>\n" .
4289                       "</tr>";
4290         }
4291         if (defined $extra) {
4292                 print "<tr>\n" .
4293                       "<td colspan=\"5\">$extra</td>\n" .
4294                       "</tr>\n";
4295         }
4296         print "</table>\n";
4297 }
4298
4299 sub git_heads_body {
4300         # uses global variable $project
4301         my ($headlist, $head, $from, $to, $extra) = @_;
4302         $from = 0 unless defined $from;
4303         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4304
4305         print "<table class=\"heads\">\n";
4306         my $alternate = 1;
4307         for (my $i = $from; $i <= $to; $i++) {
4308                 my $entry = $headlist->[$i];
4309                 my %ref = %$entry;
4310                 my $curr = $ref{'id'} eq $head;
4311                 if ($alternate) {
4312                         print "<tr class=\"dark\">\n";
4313                 } else {
4314                         print "<tr class=\"light\">\n";
4315                 }
4316                 $alternate ^= 1;
4317                 print "<td><i>$ref{'age'}</i></td>\n" .
4318                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4319                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4320                                -class => "list name"},esc_html($ref{'name'})) .
4321                       "</td>\n" .
4322                       "<td class=\"link\">" .
4323                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4324                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4325                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4326                       "</td>\n" .
4327                       "</tr>";
4328         }
4329         if (defined $extra) {
4330                 print "<tr>\n" .
4331                       "<td colspan=\"3\">$extra</td>\n" .
4332                       "</tr>\n";
4333         }
4334         print "</table>\n";
4335 }
4336
4337 sub git_search_grep_body {
4338         my ($commitlist, $from, $to, $extra) = @_;
4339         $from = 0 unless defined $from;
4340         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4341
4342         print "<table class=\"commit_search\">\n";
4343         my $alternate = 1;
4344         for (my $i = $from; $i <= $to; $i++) {
4345                 my %co = %{$commitlist->[$i]};
4346                 if (!%co) {
4347                         next;
4348                 }
4349                 my $commit = $co{'id'};
4350                 if ($alternate) {
4351                         print "<tr class=\"dark\">\n";
4352                 } else {
4353                         print "<tr class=\"light\">\n";
4354                 }
4355                 $alternate ^= 1;
4356                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
4357                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4358                       "<td><i>" . $author . "</i></td>\n" .
4359                       "<td>" .
4360                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4361                                -class => "list subject"},
4362                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4363                 my $comment = $co{'comment'};
4364                 foreach my $line (@$comment) {
4365                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4366                                 my ($lead, $match, $trail) = ($1, $2, $3);
4367                                 $match = chop_str($match, 70, 5, 'center');
4368                                 my $contextlen = int((80 - length($match))/2);
4369                                 $contextlen = 30 if ($contextlen > 30);
4370                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4371                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4372
4373                                 $lead  = esc_html($lead);
4374                                 $match = esc_html($match);
4375                                 $trail = esc_html($trail);
4376
4377                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4378                         }
4379                 }
4380                 print "</td>\n" .
4381                       "<td class=\"link\">" .
4382                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4383                       " | " .
4384                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4385                       " | " .
4386                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4387                 print "</td>\n" .
4388                       "</tr>\n";
4389         }
4390         if (defined $extra) {
4391                 print "<tr>\n" .
4392                       "<td colspan=\"3\">$extra</td>\n" .
4393                       "</tr>\n";
4394         }
4395         print "</table>\n";
4396 }
4397
4398 ## ======================================================================
4399 ## ======================================================================
4400 ## actions
4401
4402 sub git_project_list {
4403         my $order = $input_params{'order'};
4404         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4405                 die_error(400, "Unknown order parameter");
4406         }
4407
4408         my @list = git_get_projects_list();
4409         if (!@list) {
4410                 die_error(404, "No projects found");
4411         }
4412
4413         git_header_html();
4414         if (-f $home_text) {
4415                 print "<div class=\"index_include\">\n";
4416                 insert_file($home_text);
4417                 print "</div>\n";
4418         }
4419         print $cgi->startform(-method => "get") .
4420               "<p class=\"projsearch\">Search:\n" .
4421               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4422               "</p>" .
4423               $cgi->end_form() . "\n";
4424         git_project_list_body(\@list, $order);
4425         git_footer_html();
4426 }
4427
4428 sub git_forks {
4429         my $order = $input_params{'order'};
4430         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4431                 die_error(400, "Unknown order parameter");
4432         }
4433
4434         my @list = git_get_projects_list($project);
4435         if (!@list) {
4436                 die_error(404, "No forks found");
4437         }
4438
4439         git_header_html();
4440         git_print_page_nav('','');
4441         git_print_header_div('summary', "$project forks");
4442         git_project_list_body(\@list, $order);
4443         git_footer_html();
4444 }
4445
4446 sub git_project_index {
4447         my @projects = git_get_projects_list($project);
4448
4449         print $cgi->header(
4450                 -type => 'text/plain',
4451                 -charset => 'utf-8',
4452                 -content_disposition => 'inline; filename="index.aux"');
4453
4454         foreach my $pr (@projects) {
4455                 if (!exists $pr->{'owner'}) {
4456                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4457                 }
4458
4459                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4460                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4461                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4462                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4463                 $path  =~ s/ /\+/g;
4464                 $owner =~ s/ /\+/g;
4465
4466                 print "$path $owner\n";
4467         }
4468 }
4469
4470 sub git_summary {
4471         my $descr = git_get_project_description($project) || "none";
4472         my %co = parse_commit("HEAD");
4473         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4474         my $head = $co{'id'};
4475
4476         my $owner = git_get_project_owner($project);
4477
4478         my $refs = git_get_references();
4479         # These get_*_list functions return one more to allow us to see if
4480         # there are more ...
4481         my @taglist  = git_get_tags_list(16);
4482         my @headlist = git_get_heads_list(16);
4483         my @forklist;
4484         my $check_forks = gitweb_check_feature('forks');
4485
4486         if ($check_forks) {
4487                 @forklist = git_get_projects_list($project);
4488         }
4489
4490         git_header_html();
4491         git_print_page_nav('summary','', $head);
4492
4493         print "<div class=\"title\">&nbsp;</div>\n";
4494         print "<table class=\"projects_list\">\n" .
4495               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4496               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4497         if (defined $cd{'rfc2822'}) {
4498                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4499         }
4500
4501         # use per project git URL list in $projectroot/$project/cloneurl
4502         # or make project git URL from git base URL and project name
4503         my $url_tag = "URL";
4504         my @url_list = git_get_project_url_list($project);
4505         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4506         foreach my $git_url (@url_list) {
4507                 next unless $git_url;
4508                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4509                 $url_tag = "";
4510         }
4511
4512         # Tag cloud
4513         my $show_ctags = gitweb_check_feature('ctags');
4514         if ($show_ctags) {
4515                 my $ctags = git_get_project_ctags($project);
4516                 my $cloud = git_populate_project_tagcloud($ctags);
4517                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4518                 print "</td>\n<td>" unless %$ctags;
4519                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4520                 print "</td>\n<td>" if %$ctags;
4521                 print git_show_project_tagcloud($cloud, 48);
4522                 print "</td></tr>";
4523         }
4524
4525         print "</table>\n";
4526
4527         # If XSS prevention is on, we don't include README.html.
4528         # TODO: Allow a readme in some safe format.
4529         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4530                 print "<div class=\"title\">readme</div>\n" .
4531                       "<div class=\"readme\">\n";
4532                 insert_file("$projectroot/$project/README.html");
4533                 print "\n</div>\n"; # class="readme"
4534         }
4535
4536         # we need to request one more than 16 (0..15) to check if
4537         # those 16 are all
4538         my @commitlist = $head ? parse_commits($head, 17) : ();
4539         if (@commitlist) {
4540                 git_print_header_div('shortlog');
4541                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4542                                   $#commitlist <=  15 ? undef :
4543                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4544         }
4545
4546         if (@taglist) {
4547                 git_print_header_div('tags');
4548                 git_tags_body(\@taglist, 0, 15,
4549                               $#taglist <=  15 ? undef :
4550                               $cgi->a({-href => href(action=>"tags")}, "..."));
4551         }
4552
4553         if (@headlist) {
4554                 git_print_header_div('heads');
4555                 git_heads_body(\@headlist, $head, 0, 15,
4556                                $#headlist <= 15 ? undef :
4557                                $cgi->a({-href => href(action=>"heads")}, "..."));
4558         }
4559
4560         if (@forklist) {
4561                 git_print_header_div('forks');
4562                 git_project_list_body(\@forklist, 'age', 0, 15,
4563                                       $#forklist <= 15 ? undef :
4564                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4565                                       'no_header');
4566         }
4567
4568         git_footer_html();
4569 }
4570
4571 sub git_tag {
4572         my $head = git_get_head_hash($project);
4573         git_header_html();
4574         git_print_page_nav('','', $head,undef,$head);
4575         my %tag = parse_tag($hash);
4576
4577         if (! %tag) {
4578                 die_error(404, "Unknown tag object");
4579         }
4580
4581         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4582         print "<div class=\"title_text\">\n" .
4583               "<table class=\"object_header\">\n" .
4584               "<tr>\n" .
4585               "<td>object</td>\n" .
4586               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4587                                $tag{'object'}) . "</td>\n" .
4588               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4589                                               $tag{'type'}) . "</td>\n" .
4590               "</tr>\n";
4591         if (defined($tag{'author'})) {
4592                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4593                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4594                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4595                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4596                         "</td></tr>\n";
4597         }
4598         print "</table>\n\n" .
4599               "</div>\n";
4600         print "<div class=\"page_body\">";
4601         my $comment = $tag{'comment'};
4602         foreach my $line (@$comment) {
4603                 chomp $line;
4604                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4605         }
4606         print "</div>\n";
4607         git_footer_html();
4608 }
4609
4610 sub git_blame {
4611         # permissions
4612         gitweb_check_feature('blame')
4613                 or die_error(403, "Blame view not allowed");
4614
4615         # error checking
4616         die_error(400, "No file name given") unless $file_name;
4617         $hash_base ||= git_get_head_hash($project);
4618         die_error(404, "Couldn't find base commit") unless $hash_base;
4619         my %co = parse_commit($hash_base)
4620                 or die_error(404, "Commit not found");
4621         my $ftype = "blob";
4622         if (!defined $hash) {
4623                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4624                         or die_error(404, "Error looking up file");
4625         } else {
4626                 $ftype = git_get_type($hash);
4627                 if ($ftype !~ "blob") {
4628                         die_error(400, "Object is not a blob");
4629                 }
4630         }
4631
4632         # run git-blame --porcelain
4633         open my $fd, "-|", git_cmd(), "blame", '-p',
4634                 $hash_base, '--', $file_name
4635                 or die_error(500, "Open git-blame failed");
4636
4637         # page header
4638         git_header_html();
4639         my $formats_nav =
4640                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4641                         "blob") .
4642                 " | " .
4643                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4644                         "history") .
4645                 " | " .
4646                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4647                         "HEAD");
4648         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4649         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4650         git_print_page_path($file_name, $ftype, $hash_base);
4651
4652         # page body
4653         my @rev_color = qw(light2 dark2);
4654         my $num_colors = scalar(@rev_color);
4655         my $current_color = 0;
4656         my %metainfo = ();
4657
4658         print <<HTML;
4659 <div class="page_body">
4660 <table class="blame">
4661 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4662 HTML
4663  LINE:
4664         while (my $line = <$fd>) {
4665                 chomp $line;
4666                 # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
4667                 # no <lines in group> for subsequent lines in group of lines
4668                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4669                    ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
4670                 if (!exists $metainfo{$full_rev}) {
4671                         $metainfo{$full_rev} = {};
4672                 }
4673                 my $meta = $metainfo{$full_rev};
4674                 my $data;
4675                 while ($data = <$fd>) {
4676                         chomp $data;
4677                         last if ($data =~ s/^\t//); # contents of line
4678                         if ($data =~ /^(\S+) (.*)$/) {
4679                                 $meta->{$1} = $2;
4680                         }
4681                 }
4682                 my $short_rev = substr($full_rev, 0, 8);
4683                 my $author = $meta->{'author'};
4684                 my %date =
4685                         parse_date($meta->{'author-time'}, $meta->{'author-tz'});
4686                 my $date = $date{'iso-tz'};
4687                 if ($group_size) {
4688                         $current_color = ($current_color + 1) % $num_colors;
4689                 }
4690                 print "<tr id=\"l$lineno\" class=\"$rev_color[$current_color]\">\n";
4691                 if ($group_size) {
4692                         print "<td class=\"sha1\"";
4693                         print " title=\"". esc_html($author) . ", $date\"";
4694                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4695                         print ">";
4696                         print $cgi->a({-href => href(action=>"commit",
4697                                                      hash=>$full_rev,
4698                                                      file_name=>$file_name)},
4699                                       esc_html($short_rev));
4700                         print "</td>\n";
4701                 }
4702                 my $parent_commit;
4703                 if (!exists $meta->{'parent'}) {
4704                         open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4705                                 or die_error(500, "Open git-rev-parse failed");
4706                         $parent_commit = <$dd>;
4707                         close $dd;
4708                         chomp($parent_commit);
4709                         $meta->{'parent'} = $parent_commit;
4710                 } else {
4711                         $parent_commit = $meta->{'parent'};
4712                 }
4713                 my $blamed = href(action => 'blame',
4714                                   file_name => $meta->{'filename'},
4715                                   hash_base => $parent_commit);
4716                 print "<td class=\"linenr\">";
4717                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4718                                 -class => "linenr" },
4719                               esc_html($lineno));
4720                 print "</td>";
4721                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4722                 print "</tr>\n";
4723         }
4724         print "</table>\n";
4725         print "</div>";
4726         close $fd
4727                 or print "Reading blob failed\n";
4728
4729         # page footer
4730         git_footer_html();
4731 }
4732
4733 sub git_tags {
4734         my $head = git_get_head_hash($project);
4735         git_header_html();
4736         git_print_page_nav('','', $head,undef,$head);
4737         git_print_header_div('summary', $project);
4738
4739         my @tagslist = git_get_tags_list();
4740         if (@tagslist) {
4741                 git_tags_body(\@tagslist);
4742         }
4743         git_footer_html();
4744 }
4745
4746 sub git_heads {
4747         my $head = git_get_head_hash($project);
4748         git_header_html();
4749         git_print_page_nav('','', $head,undef,$head);
4750         git_print_header_div('summary', $project);
4751
4752         my @headslist = git_get_heads_list();
4753         if (@headslist) {
4754                 git_heads_body(\@headslist, $head);
4755         }
4756         git_footer_html();
4757 }
4758
4759 sub git_blob_plain {
4760         my $type = shift;
4761         my $expires;
4762
4763         if (!defined $hash) {
4764                 if (defined $file_name) {
4765                         my $base = $hash_base || git_get_head_hash($project);
4766                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4767                                 or die_error(404, "Cannot find file");
4768                 } else {
4769                         die_error(400, "No file name defined");
4770                 }
4771         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4772                 # blobs defined by non-textual hash id's can be cached
4773                 $expires = "+1d";
4774         }
4775
4776         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4777                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4778
4779         # content-type (can include charset)
4780         $type = blob_contenttype($fd, $file_name, $type);
4781
4782         # "save as" filename, even when no $file_name is given
4783         my $save_as = "$hash";
4784         if (defined $file_name) {
4785                 $save_as = $file_name;
4786         } elsif ($type =~ m/^text\//) {
4787                 $save_as .= '.txt';
4788         }
4789
4790         # With XSS prevention on, blobs of all types except a few known safe
4791         # ones are served with "Content-Disposition: attachment" to make sure
4792         # they don't run in our security domain.  For certain image types,
4793         # blob view writes an <img> tag referring to blob_plain view, and we
4794         # want to be sure not to break that by serving the image as an
4795         # attachment (though Firefox 3 doesn't seem to care).
4796         my $sandbox = $prevent_xss &&
4797                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
4798
4799         print $cgi->header(
4800                 -type => $type,
4801                 -expires => $expires,
4802                 -content_disposition =>
4803                         ($sandbox ? 'attachment' : 'inline')
4804                         . '; filename="' . $save_as . '"');
4805         local $/ = undef;
4806         binmode STDOUT, ':raw';
4807         print <$fd>;
4808         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4809         close $fd;
4810 }
4811
4812 sub git_blob {
4813         my $expires;
4814
4815         if (!defined $hash) {
4816                 if (defined $file_name) {
4817                         my $base = $hash_base || git_get_head_hash($project);
4818                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4819                                 or die_error(404, "Cannot find file");
4820                 } else {
4821                         die_error(400, "No file name defined");
4822                 }
4823         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4824                 # blobs defined by non-textual hash id's can be cached
4825                 $expires = "+1d";
4826         }
4827
4828         my $have_blame = gitweb_check_feature('blame');
4829         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4830                 or die_error(500, "Couldn't cat $file_name, $hash");
4831         my $mimetype = blob_mimetype($fd, $file_name);
4832         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4833                 close $fd;
4834                 return git_blob_plain($mimetype);
4835         }
4836         # we can have blame only for text/* mimetype
4837         $have_blame &&= ($mimetype =~ m!^text/!);
4838
4839         git_header_html(undef, $expires);
4840         my $formats_nav = '';
4841         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4842                 if (defined $file_name) {
4843                         if ($have_blame) {
4844                                 $formats_nav .=
4845                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4846                                                 "blame") .
4847                                         " | ";
4848                         }
4849                         $formats_nav .=
4850                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4851                                         "history") .
4852                                 " | " .
4853                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4854                                         "raw") .
4855                                 " | " .
4856                                 $cgi->a({-href => href(action=>"blob",
4857                                                        hash_base=>"HEAD", file_name=>$file_name)},
4858                                         "HEAD");
4859                 } else {
4860                         $formats_nav .=
4861                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4862                                         "raw");
4863                 }
4864                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4865                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4866         } else {
4867                 print "<div class=\"page_nav\">\n" .
4868                       "<br/><br/></div>\n" .
4869                       "<div class=\"title\">$hash</div>\n";
4870         }
4871         git_print_page_path($file_name, "blob", $hash_base);
4872         print "<div class=\"page_body\">\n";
4873         if ($mimetype =~ m!^image/!) {
4874                 print qq!<img type="$mimetype"!;
4875                 if ($file_name) {
4876                         print qq! alt="$file_name" title="$file_name"!;
4877                 }
4878                 print qq! src="! .
4879                       href(action=>"blob_plain", hash=>$hash,
4880                            hash_base=>$hash_base, file_name=>$file_name) .
4881                       qq!" />\n!;
4882         } else {
4883                 my $nr;
4884                 while (my $line = <$fd>) {
4885                         chomp $line;
4886                         $nr++;
4887                         $line = untabify($line);
4888                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4889                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4890                 }
4891         }
4892         close $fd
4893                 or print "Reading blob failed.\n";
4894         print "</div>";
4895         git_footer_html();
4896 }
4897
4898 sub git_tree {
4899         if (!defined $hash_base) {
4900                 $hash_base = "HEAD";
4901         }
4902         if (!defined $hash) {
4903                 if (defined $file_name) {
4904                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4905                 } else {
4906                         $hash = $hash_base;
4907                 }
4908         }
4909         die_error(404, "No such tree") unless defined($hash);
4910
4911         my @entries = ();
4912         {
4913                 local $/ = "\0";
4914                 open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4915                         or die_error(500, "Open git-ls-tree failed");
4916                 @entries = map { chomp; $_ } <$fd>;
4917                 close $fd
4918                         or die_error(404, "Reading tree failed");
4919         }
4920
4921         my $refs = git_get_references();
4922         my $ref = format_ref_marker($refs, $hash_base);
4923         git_header_html();
4924         my $basedir = '';
4925         my $have_blame = gitweb_check_feature('blame');
4926         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4927                 my @views_nav = ();
4928                 if (defined $file_name) {
4929                         push @views_nav,
4930                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4931                                         "history"),
4932                                 $cgi->a({-href => href(action=>"tree",
4933                                                        hash_base=>"HEAD", file_name=>$file_name)},
4934                                         "HEAD"),
4935                 }
4936                 my $snapshot_links = format_snapshot_links($hash);
4937                 if (defined $snapshot_links) {
4938                         # FIXME: Should be available when we have no hash base as well.
4939                         push @views_nav, $snapshot_links;
4940                 }
4941                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4942                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4943         } else {
4944                 undef $hash_base;
4945                 print "<div class=\"page_nav\">\n";
4946                 print "<br/><br/></div>\n";
4947                 print "<div class=\"title\">$hash</div>\n";
4948         }
4949         if (defined $file_name) {
4950                 $basedir = $file_name;
4951                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4952                         $basedir .= '/';
4953                 }
4954                 git_print_page_path($file_name, 'tree', $hash_base);
4955         }
4956         print "<div class=\"page_body\">\n";
4957         print "<table class=\"tree\">\n";
4958         my $alternate = 1;
4959         # '..' (top directory) link if possible
4960         if (defined $hash_base &&
4961             defined $file_name && $file_name =~ m![^/]+$!) {
4962                 if ($alternate) {
4963                         print "<tr class=\"dark\">\n";
4964                 } else {
4965                         print "<tr class=\"light\">\n";
4966                 }
4967                 $alternate ^= 1;
4968
4969                 my $up = $file_name;
4970                 $up =~ s!/?[^/]+$!!;
4971                 undef $up unless $up;
4972                 # based on git_print_tree_entry
4973                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4974                 print '<td class="list">';
4975                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4976                                              file_name=>$up)},
4977                               "..");
4978                 print "</td>\n";
4979                 print "<td class=\"link\"></td>\n";
4980
4981                 print "</tr>\n";
4982         }
4983         foreach my $line (@entries) {
4984                 my %t = parse_ls_tree_line($line, -z => 1);
4985
4986                 if ($alternate) {
4987                         print "<tr class=\"dark\">\n";
4988                 } else {
4989                         print "<tr class=\"light\">\n";
4990                 }
4991                 $alternate ^= 1;
4992
4993                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4994
4995                 print "</tr>\n";
4996         }
4997         print "</table>\n" .
4998               "</div>";
4999         git_footer_html();
5000 }
5001
5002 sub git_snapshot {
5003         my $format = $input_params{'snapshot_format'};
5004         if (!@snapshot_fmts) {
5005                 die_error(403, "Snapshots not allowed");
5006         }
5007         # default to first supported snapshot format
5008         $format ||= $snapshot_fmts[0];
5009         if ($format !~ m/^[a-z0-9]+$/) {
5010                 die_error(400, "Invalid snapshot format parameter");
5011         } elsif (!exists($known_snapshot_formats{$format})) {
5012                 die_error(400, "Unknown snapshot format");
5013         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5014                 die_error(403, "Unsupported snapshot format");
5015         }
5016
5017         if (!defined $hash) {
5018                 $hash = git_get_head_hash($project);
5019         }
5020
5021         my $name = $project;
5022         $name =~ s,([^/])/*\.git$,$1,;
5023         $name = basename($name);
5024         my $filename = to_utf8($name);
5025         $name =~ s/\047/\047\\\047\047/g;
5026         my $cmd;
5027         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
5028         $cmd = quote_command(
5029                 git_cmd(), 'archive',
5030                 "--format=$known_snapshot_formats{$format}{'format'}",
5031                 "--prefix=$name/", $hash);
5032         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5033                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5034         }
5035
5036         print $cgi->header(
5037                 -type => $known_snapshot_formats{$format}{'type'},
5038                 -content_disposition => 'inline; filename="' . "$filename" . '"',
5039                 -status => '200 OK');
5040
5041         open my $fd, "-|", $cmd
5042                 or die_error(500, "Execute git-archive failed");
5043         binmode STDOUT, ':raw';
5044         print <$fd>;
5045         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5046         close $fd;
5047 }
5048
5049 sub git_log {
5050         my $head = git_get_head_hash($project);
5051         if (!defined $hash) {
5052                 $hash = $head;
5053         }
5054         if (!defined $page) {
5055                 $page = 0;
5056         }
5057         my $refs = git_get_references();
5058
5059         my @commitlist = parse_commits($hash, 101, (100 * $page));
5060
5061         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
5062
5063         my ($patch_max) = gitweb_get_feature('patches');
5064         if ($patch_max) {
5065                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5066                         $paging_nav .= " &sdot; " .
5067                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5068                                         "patches");
5069                 }
5070         }
5071
5072         git_header_html();
5073         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5074
5075         if (!@commitlist) {
5076                 my %co = parse_commit($hash);
5077
5078                 git_print_header_div('summary', $project);
5079                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5080         }
5081         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5082         for (my $i = 0; $i <= $to; $i++) {
5083                 my %co = %{$commitlist[$i]};
5084                 next if !%co;
5085                 my $commit = $co{'id'};
5086                 my $ref = format_ref_marker($refs, $commit);
5087                 my %ad = parse_date($co{'author_epoch'});
5088                 git_print_header_div('commit',
5089                                "<span class=\"age\">$co{'age_string'}</span>" .
5090                                esc_html($co{'title'}) . $ref,
5091                                $commit);
5092                 print "<div class=\"title_text\">\n" .
5093                       "<div class=\"log_link\">\n" .
5094                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5095                       " | " .
5096                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5097                       " | " .
5098                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5099                       "<br/>\n" .
5100                       "</div>\n" .
5101                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
5102                       "</div>\n";
5103
5104                 print "<div class=\"log_body\">\n";
5105                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5106                 print "</div>\n";
5107         }
5108         if ($#commitlist >= 100) {
5109                 print "<div class=\"page_nav\">\n";
5110                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5111                                -accesskey => "n", -title => "Alt-n"}, "next");
5112                 print "</div>\n";
5113         }
5114         git_footer_html();
5115 }
5116
5117 sub git_commit {
5118         $hash ||= $hash_base || "HEAD";
5119         my %co = parse_commit($hash)
5120             or die_error(404, "Unknown commit object");
5121         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5122         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
5123
5124         my $parent  = $co{'parent'};
5125         my $parents = $co{'parents'}; # listref
5126
5127         # we need to prepare $formats_nav before any parameter munging
5128         my $formats_nav;
5129         if (!defined $parent) {
5130                 # --root commitdiff
5131                 $formats_nav .= '(initial)';
5132         } elsif (@$parents == 1) {
5133                 # single parent commit
5134                 $formats_nav .=
5135                         '(parent: ' .
5136                         $cgi->a({-href => href(action=>"commit",
5137                                                hash=>$parent)},
5138                                 esc_html(substr($parent, 0, 7))) .
5139                         ')';
5140         } else {
5141                 # merge commit
5142                 $formats_nav .=
5143                         '(merge: ' .
5144                         join(' ', map {
5145                                 $cgi->a({-href => href(action=>"commit",
5146                                                        hash=>$_)},
5147                                         esc_html(substr($_, 0, 7)));
5148                         } @$parents ) .
5149                         ')';
5150         }
5151         if (gitweb_check_feature('patches')) {
5152                 $formats_nav .= " | " .
5153                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5154                                 "patch");
5155         }
5156
5157         if (!defined $parent) {
5158                 $parent = "--root";
5159         }
5160         my @difftree;
5161         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5162                 @diff_opts,
5163                 (@$parents <= 1 ? $parent : '-c'),
5164                 $hash, "--"
5165                 or die_error(500, "Open git-diff-tree failed");
5166         @difftree = map { chomp; $_ } <$fd>;
5167         close $fd or die_error(404, "Reading git-diff-tree failed");
5168
5169         # non-textual hash id's can be cached
5170         my $expires;
5171         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5172                 $expires = "+1d";
5173         }
5174         my $refs = git_get_references();
5175         my $ref = format_ref_marker($refs, $co{'id'});
5176
5177         git_header_html(undef, $expires);
5178         git_print_page_nav('commit', '',
5179                            $hash, $co{'tree'}, $hash,
5180                            $formats_nav);
5181
5182         if (defined $co{'parent'}) {
5183                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5184         } else {
5185                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5186         }
5187         print "<div class=\"title_text\">\n" .
5188               "<table class=\"object_header\">\n";
5189         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
5190               "<tr>" .
5191               "<td></td><td> $ad{'rfc2822'}";
5192         if ($ad{'hour_local'} < 6) {
5193                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
5194                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5195         } else {
5196                 printf(" (%02d:%02d %s)",
5197                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5198         }
5199         print "</td>" .
5200               "</tr>\n";
5201         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
5202         print "<tr><td></td><td> $cd{'rfc2822'}" .
5203               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
5204               "</td></tr>\n";
5205         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5206         print "<tr>" .
5207               "<td>tree</td>" .
5208               "<td class=\"sha1\">" .
5209               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5210                        class => "list"}, $co{'tree'}) .
5211               "</td>" .
5212               "<td class=\"link\">" .
5213               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5214                       "tree");
5215         my $snapshot_links = format_snapshot_links($hash);
5216         if (defined $snapshot_links) {
5217                 print " | " . $snapshot_links;
5218         }
5219         print "</td>" .
5220               "</tr>\n";
5221
5222         foreach my $par (@$parents) {
5223                 print "<tr>" .
5224                       "<td>parent</td>" .
5225                       "<td class=\"sha1\">" .
5226                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5227                                class => "list"}, $par) .
5228                       "</td>" .
5229                       "<td class=\"link\">" .
5230                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5231                       " | " .
5232                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5233                       "</td>" .
5234                       "</tr>\n";
5235         }
5236         print "</table>".
5237               "</div>\n";
5238
5239         print "<div class=\"page_body\">\n";
5240         git_print_log($co{'comment'});
5241         print "</div>\n";
5242
5243         git_difftree_body(\@difftree, $hash, @$parents);
5244
5245         git_footer_html();
5246 }
5247
5248 sub git_object {
5249         # object is defined by:
5250         # - hash or hash_base alone
5251         # - hash_base and file_name
5252         my $type;
5253
5254         # - hash or hash_base alone
5255         if ($hash || ($hash_base && !defined $file_name)) {
5256                 my $object_id = $hash || $hash_base;
5257
5258                 open my $fd, "-|", quote_command(
5259                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5260                         or die_error(404, "Object does not exist");
5261                 $type = <$fd>;
5262                 chomp $type;
5263                 close $fd
5264                         or die_error(404, "Object does not exist");
5265
5266         # - hash_base and file_name
5267         } elsif ($hash_base && defined $file_name) {
5268                 $file_name =~ s,/+$,,;
5269
5270                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5271                         or die_error(404, "Base object does not exist");
5272
5273                 # here errors should not hapen
5274                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5275                         or die_error(500, "Open git-ls-tree failed");
5276                 my $line = <$fd>;
5277                 close $fd;
5278
5279                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5280                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5281                         die_error(404, "File or directory for given base does not exist");
5282                 }
5283                 $type = $2;
5284                 $hash = $3;
5285         } else {
5286                 die_error(400, "Not enough information to find object");
5287         }
5288
5289         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5290                                           hash=>$hash, hash_base=>$hash_base,
5291                                           file_name=>$file_name),
5292                              -status => '302 Found');
5293 }
5294
5295 sub git_blobdiff {
5296         my $format = shift || 'html';
5297
5298         my $fd;
5299         my @difftree;
5300         my %diffinfo;
5301         my $expires;
5302
5303         # preparing $fd and %diffinfo for git_patchset_body
5304         # new style URI
5305         if (defined $hash_base && defined $hash_parent_base) {
5306                 if (defined $file_name) {
5307                         # read raw output
5308                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5309                                 $hash_parent_base, $hash_base,
5310                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5311                                 or die_error(500, "Open git-diff-tree failed");
5312                         @difftree = map { chomp; $_ } <$fd>;
5313                         close $fd
5314                                 or die_error(404, "Reading git-diff-tree failed");
5315                         @difftree
5316                                 or die_error(404, "Blob diff not found");
5317
5318                 } elsif (defined $hash &&
5319                          $hash =~ /[0-9a-fA-F]{40}/) {
5320                         # try to find filename from $hash
5321
5322                         # read filtered raw output
5323                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5324                                 $hash_parent_base, $hash_base, "--"
5325                                 or die_error(500, "Open git-diff-tree failed");
5326                         @difftree =
5327                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5328                                 # $hash == to_id
5329                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5330                                 map { chomp; $_ } <$fd>;
5331                         close $fd
5332                                 or die_error(404, "Reading git-diff-tree failed");
5333                         @difftree
5334                                 or die_error(404, "Blob diff not found");
5335
5336                 } else {
5337                         die_error(400, "Missing one of the blob diff parameters");
5338                 }
5339
5340                 if (@difftree > 1) {
5341                         die_error(400, "Ambiguous blob diff specification");
5342                 }
5343
5344                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5345                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5346                 $file_name   ||= $diffinfo{'to_file'};
5347
5348                 $hash_parent ||= $diffinfo{'from_id'};
5349                 $hash        ||= $diffinfo{'to_id'};
5350
5351                 # non-textual hash id's can be cached
5352                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5353                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5354                         $expires = '+1d';
5355                 }
5356
5357                 # open patch output
5358                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5359                         '-p', ($format eq 'html' ? "--full-index" : ()),
5360                         $hash_parent_base, $hash_base,
5361                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5362                         or die_error(500, "Open git-diff-tree failed");
5363         }
5364
5365         # old/legacy style URI -- not generated anymore since 1.4.3.
5366         if (!%diffinfo) {
5367                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5368         }
5369
5370         # header
5371         if ($format eq 'html') {
5372                 my $formats_nav =
5373                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5374                                 "raw");
5375                 git_header_html(undef, $expires);
5376                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5377                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5378                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5379                 } else {
5380                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5381                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5382                 }
5383                 if (defined $file_name) {
5384                         git_print_page_path($file_name, "blob", $hash_base);
5385                 } else {
5386                         print "<div class=\"page_path\"></div>\n";
5387                 }
5388
5389         } elsif ($format eq 'plain') {
5390                 print $cgi->header(
5391                         -type => 'text/plain',
5392                         -charset => 'utf-8',
5393                         -expires => $expires,
5394                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5395
5396                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5397
5398         } else {
5399                 die_error(400, "Unknown blobdiff format");
5400         }
5401
5402         # patch
5403         if ($format eq 'html') {
5404                 print "<div class=\"page_body\">\n";
5405
5406                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5407                 close $fd;
5408
5409                 print "</div>\n"; # class="page_body"
5410                 git_footer_html();
5411
5412         } else {
5413                 while (my $line = <$fd>) {
5414                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5415                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5416
5417                         print $line;
5418
5419                         last if $line =~ m!^\+\+\+!;
5420                 }
5421                 local $/ = undef;
5422                 print <$fd>;
5423                 close $fd;
5424         }
5425 }
5426
5427 sub git_blobdiff_plain {
5428         git_blobdiff('plain');
5429 }
5430
5431 sub git_commitdiff {
5432         my %params = @_;
5433         my $format = $params{-format} || 'html';
5434
5435         my ($patch_max) = gitweb_get_feature('patches');
5436         if ($format eq 'patch') {
5437                 die_error(403, "Patch view not allowed") unless $patch_max;
5438         }
5439
5440         $hash ||= $hash_base || "HEAD";
5441         my %co = parse_commit($hash)
5442             or die_error(404, "Unknown commit object");
5443
5444         # choose format for commitdiff for merge
5445         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5446                 $hash_parent = '--cc';
5447         }
5448         # we need to prepare $formats_nav before almost any parameter munging
5449         my $formats_nav;
5450         if ($format eq 'html') {
5451                 $formats_nav =
5452                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5453                                 "raw");
5454                 if ($patch_max) {
5455                         $formats_nav .= " | " .
5456                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5457                                         "patch");
5458                 }
5459
5460                 if (defined $hash_parent &&
5461                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5462                         # commitdiff with two commits given
5463                         my $hash_parent_short = $hash_parent;
5464                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5465                                 $hash_parent_short = substr($hash_parent, 0, 7);
5466                         }
5467                         $formats_nav .=
5468                                 ' (from';
5469                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5470                                 if ($co{'parents'}[$i] eq $hash_parent) {
5471                                         $formats_nav .= ' parent ' . ($i+1);
5472                                         last;
5473                                 }
5474                         }
5475                         $formats_nav .= ': ' .
5476                                 $cgi->a({-href => href(action=>"commitdiff",
5477                                                        hash=>$hash_parent)},
5478                                         esc_html($hash_parent_short)) .
5479                                 ')';
5480                 } elsif (!$co{'parent'}) {
5481                         # --root commitdiff
5482                         $formats_nav .= ' (initial)';
5483                 } elsif (scalar @{$co{'parents'}} == 1) {
5484                         # single parent commit
5485                         $formats_nav .=
5486                                 ' (parent: ' .
5487                                 $cgi->a({-href => href(action=>"commitdiff",
5488                                                        hash=>$co{'parent'})},
5489                                         esc_html(substr($co{'parent'}, 0, 7))) .
5490                                 ')';
5491                 } else {
5492                         # merge commit
5493                         if ($hash_parent eq '--cc') {
5494                                 $formats_nav .= ' | ' .
5495                                         $cgi->a({-href => href(action=>"commitdiff",
5496                                                                hash=>$hash, hash_parent=>'-c')},
5497                                                 'combined');
5498                         } else { # $hash_parent eq '-c'
5499                                 $formats_nav .= ' | ' .
5500                                         $cgi->a({-href => href(action=>"commitdiff",
5501                                                                hash=>$hash, hash_parent=>'--cc')},
5502                                                 'compact');
5503                         }
5504                         $formats_nav .=
5505                                 ' (merge: ' .
5506                                 join(' ', map {
5507                                         $cgi->a({-href => href(action=>"commitdiff",
5508                                                                hash=>$_)},
5509                                                 esc_html(substr($_, 0, 7)));
5510                                 } @{$co{'parents'}} ) .
5511                                 ')';
5512                 }
5513         }
5514
5515         my $hash_parent_param = $hash_parent;
5516         if (!defined $hash_parent_param) {
5517                 # --cc for multiple parents, --root for parentless
5518                 $hash_parent_param =
5519                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5520         }
5521
5522         # read commitdiff
5523         my $fd;
5524         my @difftree;
5525         if ($format eq 'html') {
5526                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5527                         "--no-commit-id", "--patch-with-raw", "--full-index",
5528                         $hash_parent_param, $hash, "--"
5529                         or die_error(500, "Open git-diff-tree failed");
5530
5531                 while (my $line = <$fd>) {
5532                         chomp $line;
5533                         # empty line ends raw part of diff-tree output
5534                         last unless $line;
5535                         push @difftree, scalar parse_difftree_raw_line($line);
5536                 }
5537
5538         } elsif ($format eq 'plain') {
5539                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5540                         '-p', $hash_parent_param, $hash, "--"
5541                         or die_error(500, "Open git-diff-tree failed");
5542         } elsif ($format eq 'patch') {
5543                 # For commit ranges, we limit the output to the number of
5544                 # patches specified in the 'patches' feature.
5545                 # For single commits, we limit the output to a single patch,
5546                 # diverging from the git-format-patch default.
5547                 my @commit_spec = ();
5548                 if ($hash_parent) {
5549                         if ($patch_max > 0) {
5550                                 push @commit_spec, "-$patch_max";
5551                         }
5552                         push @commit_spec, '-n', "$hash_parent..$hash";
5553                 } else {
5554                         if ($params{-single}) {
5555                                 push @commit_spec, '-1';
5556                         } else {
5557                                 if ($patch_max > 0) {
5558                                         push @commit_spec, "-$patch_max";
5559                                 }
5560                                 push @commit_spec, "-n";
5561                         }
5562                         push @commit_spec, '--root', $hash;
5563                 }
5564                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5565                         '--stdout', @commit_spec
5566                         or die_error(500, "Open git-format-patch failed");
5567         } else {
5568                 die_error(400, "Unknown commitdiff format");
5569         }
5570
5571         # non-textual hash id's can be cached
5572         my $expires;
5573         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5574                 $expires = "+1d";
5575         }
5576
5577         # write commit message
5578         if ($format eq 'html') {
5579                 my $refs = git_get_references();
5580                 my $ref = format_ref_marker($refs, $co{'id'});
5581
5582                 git_header_html(undef, $expires);
5583                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5584                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5585                 git_print_authorship(\%co);
5586                 print "<div class=\"page_body\">\n";
5587                 if (@{$co{'comment'}} > 1) {
5588                         print "<div class=\"log\">\n";
5589                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5590                         print "</div>\n"; # class="log"
5591                 }
5592
5593         } elsif ($format eq 'plain') {
5594                 my $refs = git_get_references("tags");
5595                 my $tagname = git_get_rev_name_tags($hash);
5596                 my $filename = basename($project) . "-$hash.patch";
5597
5598                 print $cgi->header(
5599                         -type => 'text/plain',
5600                         -charset => 'utf-8',
5601                         -expires => $expires,
5602                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5603                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5604                 print "From: " . to_utf8($co{'author'}) . "\n";
5605                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5606                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5607
5608                 print "X-Git-Tag: $tagname\n" if $tagname;
5609                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5610
5611                 foreach my $line (@{$co{'comment'}}) {
5612                         print to_utf8($line) . "\n";
5613                 }
5614                 print "---\n\n";
5615         } elsif ($format eq 'patch') {
5616                 my $filename = basename($project) . "-$hash.patch";
5617
5618                 print $cgi->header(
5619                         -type => 'text/plain',
5620                         -charset => 'utf-8',
5621                         -expires => $expires,
5622                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5623         }
5624
5625         # write patch
5626         if ($format eq 'html') {
5627                 my $use_parents = !defined $hash_parent ||
5628                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5629                 git_difftree_body(\@difftree, $hash,
5630                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5631                 print "<br/>\n";
5632
5633                 git_patchset_body($fd, \@difftree, $hash,
5634                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5635                 close $fd;
5636                 print "</div>\n"; # class="page_body"
5637                 git_footer_html();
5638
5639         } elsif ($format eq 'plain') {
5640                 local $/ = undef;
5641                 print <$fd>;
5642                 close $fd
5643                         or print "Reading git-diff-tree failed\n";
5644         } elsif ($format eq 'patch') {
5645                 local $/ = undef;
5646                 print <$fd>;
5647                 close $fd
5648                         or print "Reading git-format-patch failed\n";
5649         }
5650 }
5651
5652 sub git_commitdiff_plain {
5653         git_commitdiff(-format => 'plain');
5654 }
5655
5656 # format-patch-style patches
5657 sub git_patch {
5658         git_commitdiff(-format => 'patch', -single=> 1);
5659 }
5660
5661 sub git_patches {
5662         git_commitdiff(-format => 'patch');
5663 }
5664
5665 sub git_history {
5666         if (!defined $hash_base) {
5667                 $hash_base = git_get_head_hash($project);
5668         }
5669         if (!defined $page) {
5670                 $page = 0;
5671         }
5672         my $ftype;
5673         my %co = parse_commit($hash_base)
5674             or die_error(404, "Unknown commit object");
5675
5676         my $refs = git_get_references();
5677         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5678
5679         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5680                                        $file_name, "--full-history")
5681             or die_error(404, "No such file or directory on given branch");
5682
5683         if (!defined $hash && defined $file_name) {
5684                 # some commits could have deleted file in question,
5685                 # and not have it in tree, but one of them has to have it
5686                 for (my $i = 0; $i <= @commitlist; $i++) {
5687                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5688                         last if defined $hash;
5689                 }
5690         }
5691         if (defined $hash) {
5692                 $ftype = git_get_type($hash);
5693         }
5694         if (!defined $ftype) {
5695                 die_error(500, "Unknown type of object");
5696         }
5697
5698         my $paging_nav = '';
5699         if ($page > 0) {
5700                 $paging_nav .=
5701                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5702                                                file_name=>$file_name)},
5703                                 "first");
5704                 $paging_nav .= " &sdot; " .
5705                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5706                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5707         } else {
5708                 $paging_nav .= "first";
5709                 $paging_nav .= " &sdot; prev";
5710         }
5711         my $next_link = '';
5712         if ($#commitlist >= 100) {
5713                 $next_link =
5714                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5715                                  -accesskey => "n", -title => "Alt-n"}, "next");
5716                 $paging_nav .= " &sdot; $next_link";
5717         } else {
5718                 $paging_nav .= " &sdot; next";
5719         }
5720
5721         git_header_html();
5722         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5723         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5724         git_print_page_path($file_name, $ftype, $hash_base);
5725
5726         git_history_body(\@commitlist, 0, 99,
5727                          $refs, $hash_base, $ftype, $next_link);
5728
5729         git_footer_html();
5730 }
5731
5732 sub git_search {
5733         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5734         if (!defined $searchtext) {
5735                 die_error(400, "Text field is empty");
5736         }
5737         if (!defined $hash) {
5738                 $hash = git_get_head_hash($project);
5739         }
5740         my %co = parse_commit($hash);
5741         if (!%co) {
5742                 die_error(404, "Unknown commit object");
5743         }
5744         if (!defined $page) {
5745                 $page = 0;
5746         }
5747
5748         $searchtype ||= 'commit';
5749         if ($searchtype eq 'pickaxe') {
5750                 # pickaxe may take all resources of your box and run for several minutes
5751                 # with every query - so decide by yourself how public you make this feature
5752                 gitweb_check_feature('pickaxe')
5753                     or die_error(403, "Pickaxe is disabled");
5754         }
5755         if ($searchtype eq 'grep') {
5756                 gitweb_check_feature('grep')[0]
5757                     or die_error(403, "Grep is disabled");
5758         }
5759
5760         git_header_html();
5761
5762         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5763                 my $greptype;
5764                 if ($searchtype eq 'commit') {
5765                         $greptype = "--grep=";
5766                 } elsif ($searchtype eq 'author') {
5767                         $greptype = "--author=";
5768                 } elsif ($searchtype eq 'committer') {
5769                         $greptype = "--committer=";
5770                 }
5771                 $greptype .= $searchtext;
5772                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5773                                                $greptype, '--regexp-ignore-case',
5774                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5775
5776                 my $paging_nav = '';
5777                 if ($page > 0) {
5778                         $paging_nav .=
5779                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5780                                                        searchtext=>$searchtext,
5781                                                        searchtype=>$searchtype)},
5782                                         "first");
5783                         $paging_nav .= " &sdot; " .
5784                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5785                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5786                 } else {
5787                         $paging_nav .= "first";
5788                         $paging_nav .= " &sdot; prev";
5789                 }
5790                 my $next_link = '';
5791                 if ($#commitlist >= 100) {
5792                         $next_link =
5793                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5794                                          -accesskey => "n", -title => "Alt-n"}, "next");
5795                         $paging_nav .= " &sdot; $next_link";
5796                 } else {
5797                         $paging_nav .= " &sdot; next";
5798                 }
5799
5800                 if ($#commitlist >= 100) {
5801                 }
5802
5803                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5804                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5805                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5806         }
5807
5808         if ($searchtype eq 'pickaxe') {
5809                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5810                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5811
5812                 print "<table class=\"pickaxe search\">\n";
5813                 my $alternate = 1;
5814                 local $/ = "\n";
5815                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5816                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5817                         ($search_use_regexp ? '--pickaxe-regex' : ());
5818                 undef %co;
5819                 my @files;
5820                 while (my $line = <$fd>) {
5821                         chomp $line;
5822                         next unless $line;
5823
5824                         my %set = parse_difftree_raw_line($line);
5825                         if (defined $set{'commit'}) {
5826                                 # finish previous commit
5827                                 if (%co) {
5828                                         print "</td>\n" .
5829                                               "<td class=\"link\">" .
5830                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5831                                               " | " .
5832                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5833                                         print "</td>\n" .
5834                                               "</tr>\n";
5835                                 }
5836
5837                                 if ($alternate) {
5838                                         print "<tr class=\"dark\">\n";
5839                                 } else {
5840                                         print "<tr class=\"light\">\n";
5841                                 }
5842                                 $alternate ^= 1;
5843                                 %co = parse_commit($set{'commit'});
5844                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5845                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5846                                       "<td><i>$author</i></td>\n" .
5847                                       "<td>" .
5848                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5849                                               -class => "list subject"},
5850                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5851                         } elsif (defined $set{'to_id'}) {
5852                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5853
5854                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5855                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5856                                               -class => "list"},
5857                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5858                                       "<br/>\n";
5859                         }
5860                 }
5861                 close $fd;
5862
5863                 # finish last commit (warning: repetition!)
5864                 if (%co) {
5865                         print "</td>\n" .
5866                               "<td class=\"link\">" .
5867                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5868                               " | " .
5869                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5870                         print "</td>\n" .
5871                               "</tr>\n";
5872                 }
5873
5874                 print "</table>\n";
5875         }
5876
5877         if ($searchtype eq 'grep') {
5878                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5879                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5880
5881                 print "<table class=\"grep_search\">\n";
5882                 my $alternate = 1;
5883                 my $matches = 0;
5884                 local $/ = "\n";
5885                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5886                         $search_use_regexp ? ('-E', '-i') : '-F',
5887                         $searchtext, $co{'tree'};
5888                 my $lastfile = '';
5889                 while (my $line = <$fd>) {
5890                         chomp $line;
5891                         my ($file, $lno, $ltext, $binary);
5892                         last if ($matches++ > 1000);
5893                         if ($line =~ /^Binary file (.+) matches$/) {
5894                                 $file = $1;
5895                                 $binary = 1;
5896                         } else {
5897                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5898                         }
5899                         if ($file ne $lastfile) {
5900                                 $lastfile and print "</td></tr>\n";
5901                                 if ($alternate++) {
5902                                         print "<tr class=\"dark\">\n";
5903                                 } else {
5904                                         print "<tr class=\"light\">\n";
5905                                 }
5906                                 print "<td class=\"list\">".
5907                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5908                                                                file_name=>"$file"),
5909                                                 -class => "list"}, esc_path($file));
5910                                 print "</td><td>\n";
5911                                 $lastfile = $file;
5912                         }
5913                         if ($binary) {
5914                                 print "<div class=\"binary\">Binary file</div>\n";
5915                         } else {
5916                                 $ltext = untabify($ltext);
5917                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5918                                         $ltext = esc_html($1, -nbsp=>1);
5919                                         $ltext .= '<span class="match">';
5920                                         $ltext .= esc_html($2, -nbsp=>1);
5921                                         $ltext .= '</span>';
5922                                         $ltext .= esc_html($3, -nbsp=>1);
5923                                 } else {
5924                                         $ltext = esc_html($ltext, -nbsp=>1);
5925                                 }
5926                                 print "<div class=\"pre\">" .
5927                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5928                                                                file_name=>"$file").'#l'.$lno,
5929                                                 -class => "linenr"}, sprintf('%4i', $lno))
5930                                         . ' ' .  $ltext . "</div>\n";
5931                         }
5932                 }
5933                 if ($lastfile) {
5934                         print "</td></tr>\n";
5935                         if ($matches > 1000) {
5936                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5937                         }
5938                 } else {
5939                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5940                 }
5941                 close $fd;
5942
5943                 print "</table>\n";
5944         }
5945         git_footer_html();
5946 }
5947
5948 sub git_search_help {
5949         git_header_html();
5950         git_print_page_nav('','', $hash,$hash,$hash);
5951         print <<EOT;
5952 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5953 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5954 the pattern entered is recognized as the POSIX extended
5955 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5956 insensitive).</p>
5957 <dl>
5958 <dt><b>commit</b></dt>
5959 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5960 EOT
5961         my $have_grep = gitweb_check_feature('grep');
5962         if ($have_grep) {
5963                 print <<EOT;
5964 <dt><b>grep</b></dt>
5965 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5966     a different one) are searched for the given pattern. On large trees, this search can take
5967 a while and put some strain on the server, so please use it with some consideration. Note that
5968 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5969 case-sensitive.</dd>
5970 EOT
5971         }
5972         print <<EOT;
5973 <dt><b>author</b></dt>
5974 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5975 <dt><b>committer</b></dt>
5976 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5977 EOT
5978         my $have_pickaxe = gitweb_check_feature('pickaxe');
5979         if ($have_pickaxe) {
5980                 print <<EOT;
5981 <dt><b>pickaxe</b></dt>
5982 <dd>All commits that caused the string to appear or disappear from any file (changes that
5983 added, removed or "modified" the string) will be listed. This search can take a while and
5984 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5985 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5986 EOT
5987         }
5988         print "</dl>\n";
5989         git_footer_html();
5990 }
5991
5992 sub git_shortlog {
5993         my $head = git_get_head_hash($project);
5994         if (!defined $hash) {
5995                 $hash = $head;
5996         }
5997         if (!defined $page) {
5998                 $page = 0;
5999         }
6000         my $refs = git_get_references();
6001
6002         my $commit_hash = $hash;
6003         if (defined $hash_parent) {
6004                 $commit_hash = "$hash_parent..$hash";
6005         }
6006         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
6007
6008         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
6009         my $next_link = '';
6010         if ($#commitlist >= 100) {
6011                 $next_link =
6012                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6013                                  -accesskey => "n", -title => "Alt-n"}, "next");
6014         }
6015         my $patch_max = gitweb_check_feature('patches');
6016         if ($patch_max) {
6017                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6018                         $paging_nav .= " &sdot; " .
6019                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6020                                         "patches");
6021                 }
6022         }
6023
6024         git_header_html();
6025         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
6026         git_print_header_div('summary', $project);
6027
6028         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
6029
6030         git_footer_html();
6031 }
6032
6033 ## ......................................................................
6034 ## feeds (RSS, Atom; OPML)
6035
6036 sub git_feed {
6037         my $format = shift || 'atom';
6038         my $have_blame = gitweb_check_feature('blame');
6039
6040         # Atom: http://www.atomenabled.org/developers/syndication/
6041         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6042         if ($format ne 'rss' && $format ne 'atom') {
6043                 die_error(400, "Unknown web feed format");
6044         }
6045
6046         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6047         my $head = $hash || 'HEAD';
6048         my @commitlist = parse_commits($head, 150, 0, $file_name);
6049
6050         my %latest_commit;
6051         my %latest_date;
6052         my $content_type = "application/$format+xml";
6053         if (defined $cgi->http('HTTP_ACCEPT') &&
6054                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6055                 # browser (feed reader) prefers text/xml
6056                 $content_type = 'text/xml';
6057         }
6058         if (defined($commitlist[0])) {
6059                 %latest_commit = %{$commitlist[0]};
6060                 my $latest_epoch = $latest_commit{'committer_epoch'};
6061                 %latest_date   = parse_date($latest_epoch);
6062                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6063                 if (defined $if_modified) {
6064                         my $since;
6065                         if (eval { require HTTP::Date; 1; }) {
6066                                 $since = HTTP::Date::str2time($if_modified);
6067                         } elsif (eval { require Time::ParseDate; 1; }) {
6068                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6069                         }
6070                         if (defined $since && $latest_epoch <= $since) {
6071                                 print $cgi->header(
6072                                         -type => $content_type,
6073                                         -charset => 'utf-8',
6074                                         -last_modified => $latest_date{'rfc2822'},
6075                                         -status => '304 Not Modified');
6076                                 return;
6077                         }
6078                 }
6079                 print $cgi->header(
6080                         -type => $content_type,
6081                         -charset => 'utf-8',
6082                         -last_modified => $latest_date{'rfc2822'});
6083         } else {
6084                 print $cgi->header(
6085                         -type => $content_type,
6086                         -charset => 'utf-8');
6087         }
6088
6089         # Optimization: skip generating the body if client asks only
6090         # for Last-Modified date.
6091         return if ($cgi->request_method() eq 'HEAD');
6092
6093         # header variables
6094         my $title = "$site_name - $project/$action";
6095         my $feed_type = 'log';
6096         if (defined $hash) {
6097                 $title .= " - '$hash'";
6098                 $feed_type = 'branch log';
6099                 if (defined $file_name) {
6100                         $title .= " :: $file_name";
6101                         $feed_type = 'history';
6102                 }
6103         } elsif (defined $file_name) {
6104                 $title .= " - $file_name";
6105                 $feed_type = 'history';
6106         }
6107         $title .= " $feed_type";
6108         my $descr = git_get_project_description($project);
6109         if (defined $descr) {
6110                 $descr = esc_html($descr);
6111         } else {
6112                 $descr = "$project " .
6113                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6114                          " feed";
6115         }
6116         my $owner = git_get_project_owner($project);
6117         $owner = esc_html($owner);
6118
6119         #header
6120         my $alt_url;
6121         if (defined $file_name) {
6122                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6123         } elsif (defined $hash) {
6124                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6125         } else {
6126                 $alt_url = href(-full=>1, action=>"summary");
6127         }
6128         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6129         if ($format eq 'rss') {
6130                 print <<XML;
6131 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6132 <channel>
6133 XML
6134                 print "<title>$title</title>\n" .
6135                       "<link>$alt_url</link>\n" .
6136                       "<description>$descr</description>\n" .
6137                       "<language>en</language>\n" .
6138                       # project owner is responsible for 'editorial' content
6139                       "<managingEditor>$owner</managingEditor>\n";
6140                 if (defined $logo || defined $favicon) {
6141                         # prefer the logo to the favicon, since RSS
6142                         # doesn't allow both
6143                         my $img = esc_url($logo || $favicon);
6144                         print "<image>\n" .
6145                               "<url>$img</url>\n" .
6146                               "<title>$title</title>\n" .
6147                               "<link>$alt_url</link>\n" .
6148                               "</image>\n";
6149                 }
6150                 if (%latest_date) {
6151                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6152                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6153                 }
6154                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6155         } elsif ($format eq 'atom') {
6156                 print <<XML;
6157 <feed xmlns="http://www.w3.org/2005/Atom">
6158 XML
6159                 print "<title>$title</title>\n" .
6160                       "<subtitle>$descr</subtitle>\n" .
6161                       '<link rel="alternate" type="text/html" href="' .
6162                       $alt_url . '" />' . "\n" .
6163                       '<link rel="self" type="' . $content_type . '" href="' .
6164                       $cgi->self_url() . '" />' . "\n" .
6165                       "<id>" . href(-full=>1) . "</id>\n" .
6166                       # use project owner for feed author
6167                       "<author><name>$owner</name></author>\n";
6168                 if (defined $favicon) {
6169                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6170                 }
6171                 if (defined $logo_url) {
6172                         # not twice as wide as tall: 72 x 27 pixels
6173                         print "<logo>" . esc_url($logo) . "</logo>\n";
6174                 }
6175                 if (! %latest_date) {
6176                         # dummy date to keep the feed valid until commits trickle in:
6177                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6178                 } else {
6179                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6180                 }
6181                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6182         }
6183
6184         # contents
6185         for (my $i = 0; $i <= $#commitlist; $i++) {
6186                 my %co = %{$commitlist[$i]};
6187                 my $commit = $co{'id'};
6188                 # we read 150, we always show 30 and the ones more recent than 48 hours
6189                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6190                         last;
6191                 }
6192                 my %cd = parse_date($co{'author_epoch'});
6193
6194                 # get list of changed files
6195                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6196                         $co{'parent'} || "--root",
6197                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6198                         or next;
6199                 my @difftree = map { chomp; $_ } <$fd>;
6200                 close $fd
6201                         or next;
6202
6203                 # print element (entry, item)
6204                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6205                 if ($format eq 'rss') {
6206                         print "<item>\n" .
6207                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6208                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6209                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6210                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6211                               "<link>$co_url</link>\n" .
6212                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6213                               "<content:encoded>" .
6214                               "<![CDATA[\n";
6215                 } elsif ($format eq 'atom') {
6216                         print "<entry>\n" .
6217                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6218                               "<updated>$cd{'iso-8601'}</updated>\n" .
6219                               "<author>\n" .
6220                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6221                         if ($co{'author_email'}) {
6222                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6223                         }
6224                         print "</author>\n" .
6225                               # use committer for contributor
6226                               "<contributor>\n" .
6227                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6228                         if ($co{'committer_email'}) {
6229                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6230                         }
6231                         print "</contributor>\n" .
6232                               "<published>$cd{'iso-8601'}</published>\n" .
6233                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6234                               "<id>$co_url</id>\n" .
6235                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6236                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6237                 }
6238                 my $comment = $co{'comment'};
6239                 print "<pre>\n";
6240                 foreach my $line (@$comment) {
6241                         $line = esc_html($line);
6242                         print "$line\n";
6243                 }
6244                 print "</pre><ul>\n";
6245                 foreach my $difftree_line (@difftree) {
6246                         my %difftree = parse_difftree_raw_line($difftree_line);
6247                         next if !$difftree{'from_id'};
6248
6249                         my $file = $difftree{'file'} || $difftree{'to_file'};
6250
6251                         print "<li>" .
6252                               "[" .
6253                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6254                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6255                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6256                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6257                                       -title => "diff"}, 'D');
6258                         if ($have_blame) {
6259                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6260                                                              file_name=>$file, hash_base=>$commit),
6261                                               -title => "blame"}, 'B');
6262                         }
6263                         # if this is not a feed of a file history
6264                         if (!defined $file_name || $file_name ne $file) {
6265                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6266                                                              file_name=>$file, hash=>$commit),
6267                                               -title => "history"}, 'H');
6268                         }
6269                         $file = esc_path($file);
6270                         print "] ".
6271                               "$file</li>\n";
6272                 }
6273                 if ($format eq 'rss') {
6274                         print "</ul>]]>\n" .
6275                               "</content:encoded>\n" .
6276                               "</item>\n";
6277                 } elsif ($format eq 'atom') {
6278                         print "</ul>\n</div>\n" .
6279                               "</content>\n" .
6280                               "</entry>\n";
6281                 }
6282         }
6283
6284         # end of feed
6285         if ($format eq 'rss') {
6286                 print "</channel>\n</rss>\n";
6287         } elsif ($format eq 'atom') {
6288                 print "</feed>\n";
6289         }
6290 }
6291
6292 sub git_rss {
6293         git_feed('rss');
6294 }
6295
6296 sub git_atom {
6297         git_feed('atom');
6298 }
6299
6300 sub git_opml {
6301         my @list = git_get_projects_list();
6302
6303         print $cgi->header(
6304                 -type => 'text/xml',
6305                 -charset => 'utf-8',
6306                 -content_disposition => 'inline; filename="opml.xml"');
6307
6308         print <<XML;
6309 <?xml version="1.0" encoding="utf-8"?>
6310 <opml version="1.0">
6311 <head>
6312   <title>$site_name OPML Export</title>
6313 </head>
6314 <body>
6315 <outline text="git RSS feeds">
6316 XML
6317
6318         foreach my $pr (@list) {
6319                 my %proj = %$pr;
6320                 my $head = git_get_head_hash($proj{'path'});
6321                 if (!defined $head) {
6322                         next;
6323                 }
6324                 $git_dir = "$projectroot/$proj{'path'}";
6325                 my %co = parse_commit($head);
6326                 if (!%co) {
6327                         next;
6328                 }
6329
6330                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6331                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6332                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6333                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6334         }
6335         print <<XML;
6336 </outline>
6337 </body>
6338 </opml>
6339 XML
6340 }