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(exists $known_snapshot_formats{$_}, @fmts);
 463
 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                         my $sfx;
 695                         $hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//;
 696                         next unless $sfx = $1;
 697                         # a valid suffix was found, so set the snapshot format
 698                         # and reset the hash parameter
 699                         $input_params{'snapshot_format'} = $fmt;
 700                         $input_params{'hash'} = $hash;
 701                         # we also set the format suffix to the one requested
 702                         # in the URL: this way a request for e.g. .tgz returns
 703                         # a .tgz instead of a .tar.gz
 704                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 705                         last;
 706                 }
 707         }
 708 }
 709 evaluate_path_info();
 710
 711 our $action = $input_params{'action'};
 712 if (defined $action) {
 713         if (!validate_action($action)) {
 714                 die_error(400, "Invalid action parameter");
 715         }
 716 }
 717
 718 # parameters which are pathnames
 719 our $project = $input_params{'project'};
 720 if (defined $project) {
 721         if (!validate_project($project)) {
 722                 undef $project;
 723                 die_error(404, "No such project");
 724         }
 725 }
 726
 727 our $file_name = $input_params{'file_name'};
 728 if (defined $file_name) {
 729         if (!validate_pathname($file_name)) {
 730                 die_error(400, "Invalid file parameter");
 731         }
 732 }
 733
 734 our $file_parent = $input_params{'file_parent'};
 735 if (defined $file_parent) {
 736         if (!validate_pathname($file_parent)) {
 737                 die_error(400, "Invalid file parent parameter");
 738         }
 739 }
 740
 741 # parameters which are refnames
 742 our $hash = $input_params{'hash'};
 743 if (defined $hash) {
 744         if (!validate_refname($hash)) {
 745                 die_error(400, "Invalid hash parameter");
 746         }
 747 }
 748
 749 our $hash_parent = $input_params{'hash_parent'};
 750 if (defined $hash_parent) {
 751         if (!validate_refname($hash_parent)) {
 752                 die_error(400, "Invalid hash parent parameter");
 753         }
 754 }
 755
 756 our $hash_base = $input_params{'hash_base'};
 757 if (defined $hash_base) {
 758         if (!validate_refname($hash_base)) {
 759                 die_error(400, "Invalid hash base parameter");
 760         }
 761 }
 762
 763 our @extra_options = @{$input_params{'extra_options'}};
 764 # @extra_options is always defined, since it can only be (currently) set from
 765 # CGI, and $cgi->param() returns the empty array in array context if the param
 766 # is not set
 767 foreach my $opt (@extra_options) {
 768         if (not exists $allowed_options{$opt}) {
 769                 die_error(400, "Invalid option parameter");
 770         }
 771         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 772                 die_error(400, "Invalid option parameter for this action");
 773         }
 774 }
 775
 776 our $hash_parent_base = $input_params{'hash_parent_base'};
 777 if (defined $hash_parent_base) {
 778         if (!validate_refname($hash_parent_base)) {
 779                 die_error(400, "Invalid hash parent base parameter");
 780         }
 781 }
 782
 783 # other parameters
 784 our $page = $input_params{'page'};
 785 if (defined $page) {
 786         if ($page =~ m/[^0-9]/) {
 787                 die_error(400, "Invalid page parameter");
 788         }
 789 }
 790
 791 our $searchtype = $input_params{'searchtype'};
 792 if (defined $searchtype) {
 793         if ($searchtype =~ m/[^a-z]/) {
 794                 die_error(400, "Invalid searchtype parameter");
 795         }
 796 }
 797
 798 our $search_use_regexp = $input_params{'search_use_regexp'};
 799
 800 our $searchtext = $input_params{'searchtext'};
 801 our $search_regexp;
 802 if (defined $searchtext) {
 803         if (length($searchtext) < 2) {
 804                 die_error(403, "At least two characters are required for search parameter");
 805         }
 806         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 807 }
 808
 809 # path to the current git repository
 810 our $git_dir;
 811 $git_dir = "$projectroot/$project" if $project;
 812
 813 # list of supported snapshot formats
 814 our @snapshot_fmts = gitweb_get_feature('snapshot');
 815 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 816
 817 # dispatch
 818 if (!defined $action) {
 819         if (defined $hash) {
 820                 $action = git_get_type($hash);
 821         } elsif (defined $hash_base && defined $file_name) {
 822                 $action = git_get_type("$hash_base:$file_name");
 823         } elsif (defined $project) {
 824                 $action = 'summary';
 825         } else {
 826                 $action = 'project_list';
 827         }
 828 }
 829 if (!defined($actions{$action})) {
 830         die_error(400, "Unknown action");
 831 }
 832 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 833     !$project) {
 834         die_error(400, "Project needed");
 835 }
 836 $actions{$action}->();
 837 exit;
 838
 839 ## ======================================================================
 840 ## action links
 841
 842 sub href (%) {
 843         my %params = @_;
 844         # default is to use -absolute url() i.e. $my_uri
 845         my $href = $params{-full} ? $my_url : $my_uri;
 846
 847         $params{'project'} = $project unless exists $params{'project'};
 848
 849         if ($params{-replay}) {
 850                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 851                         if (!exists $params{$name}) {
 852                                 $params{$name} = $input_params{$name};
 853                         }
 854                 }
 855         }
 856
 857         my $use_pathinfo = gitweb_check_feature('pathinfo');
 858         if ($use_pathinfo and defined $params{'project'}) {
 859                 # try to put as many parameters as possible in PATH_INFO:
 860                 #   - project name
 861                 #   - action
 862                 #   - hash_parent or hash_parent_base:/file_parent
 863                 #   - hash or hash_base:/filename
 864                 #   - the snapshot_format as an appropriate suffix
 865
 866                 # When the script is the root DirectoryIndex for the domain,
 867                 # $href here would be something like http://gitweb.example.com/
 868                 # Thus, we strip any trailing / from $href, to spare us double
 869                 # slashes in the final URL
 870                 $href =~ s,/$,,;
 871
 872                 # Then add the project name, if present
 873                 $href .= "/".esc_url($params{'project'});
 874                 delete $params{'project'};
 875
 876                 # since we destructively absorb parameters, we keep this
 877                 # boolean that remembers if we're handling a snapshot
 878                 my $is_snapshot = $params{'action'} eq 'snapshot';
 879
 880                 # Summary just uses the project path URL, any other action is
 881                 # added to the URL
 882                 if (defined $params{'action'}) {
 883                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
 884                         delete $params{'action'};
 885                 }
 886
 887                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
 888                 # stripping nonexistent or useless pieces
 889                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
 890                         || $params{'hash_parent'} || $params{'hash'});
 891                 if (defined $params{'hash_base'}) {
 892                         if (defined $params{'hash_parent_base'}) {
 893                                 $href .= esc_url($params{'hash_parent_base'});
 894                                 # skip the file_parent if it's the same as the file_name
 895                                 delete $params{'file_parent'} if $params{'file_parent'} eq $params{'file_name'};
 896                                 if (defined $params{'file_parent'} && $params{'file_parent'} !~ /\.\./) {
 897                                         $href .= ":/".esc_url($params{'file_parent'});
 898                                         delete $params{'file_parent'};
 899                                 }
 900                                 $href .= "..";
 901                                 delete $params{'hash_parent'};
 902                                 delete $params{'hash_parent_base'};
 903                         } elsif (defined $params{'hash_parent'}) {
 904                                 $href .= esc_url($params{'hash_parent'}). "..";
 905                                 delete $params{'hash_parent'};
 906                         }
 907
 908                         $href .= esc_url($params{'hash_base'});
 909                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
 910                                 $href .= ":/".esc_url($params{'file_name'});
 911                                 delete $params{'file_name'};
 912                         }
 913                         delete $params{'hash'};
 914                         delete $params{'hash_base'};
 915                 } elsif (defined $params{'hash'}) {
 916                         $href .= esc_url($params{'hash'});
 917                         delete $params{'hash'};
 918                 }
 919
 920                 # If the action was a snapshot, we can absorb the
 921                 # snapshot_format parameter too
 922                 if ($is_snapshot) {
 923                         my $fmt = $params{'snapshot_format'};
 924                         # snapshot_format should always be defined when href()
 925                         # is called, but just in case some code forgets, we
 926                         # fall back to the default
 927                         $fmt ||= $snapshot_fmts[0];
 928                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
 929                         delete $params{'snapshot_format'};
 930                 }
 931         }
 932
 933         # now encode the parameters explicitly
 934         my @result = ();
 935         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
 936                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
 937                 if (defined $params{$name}) {
 938                         if (ref($params{$name}) eq "ARRAY") {
 939                                 foreach my $par (@{$params{$name}}) {
 940                                         push @result, $symbol . "=" . esc_param($par);
 941                                 }
 942                         } else {
 943                                 push @result, $symbol . "=" . esc_param($params{$name});
 944                         }
 945                 }
 946         }
 947         $href .= "?" . join(';', @result) if scalar @result;
 948
 949         return $href;
 950 }
 951
 952
 953 ## ======================================================================
 954 ## validation, quoting/unquoting and escaping
 955
 956 sub validate_action {
 957         my $input = shift || return undef;
 958         return undef unless exists $actions{$input};
 959         return $input;
 960 }
 961
 962 sub validate_project {
 963         my $input = shift || return undef;
 964         if (!validate_pathname($input) ||
 965                 !(-d "$projectroot/$input") ||
 966                 !check_export_ok("$projectroot/$input") ||
 967                 ($strict_export && !project_in_list($input))) {
 968                 return undef;
 969         } else {
 970                 return $input;
 971         }
 972 }
 973
 974 sub validate_pathname {
 975         my $input = shift || return undef;
 976
 977         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 978         # at the beginning, at the end, and between slashes.
 979         # also this catches doubled slashes
 980         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 981                 return undef;
 982         }
 983         # no null characters
 984         if ($input =~ m!\0!) {
 985                 return undef;
 986         }
 987         return $input;
 988 }
 989
 990 sub validate_refname {
 991         my $input = shift || return undef;
 992
 993         # textual hashes are O.K.
 994         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 995                 return $input;
 996         }
 997         # it must be correct pathname
 998         $input = validate_pathname($input)
 999                 or return undef;
1000         # restrictions on ref name according to git-check-ref-format
1001         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1002                 return undef;
1003         }
1004         return $input;
1005 }
1006
1007 # decode sequences of octets in utf8 into Perl's internal form,
1008 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1009 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1010 sub to_utf8 {
1011         my $str = shift;
1012         if (utf8::valid($str)) {
1013                 utf8::decode($str);
1014                 return $str;
1015         } else {
1016                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1017         }
1018 }
1019
1020 # quote unsafe chars, but keep the slash, even when it's not
1021 # correct, but quoted slashes look too horrible in bookmarks
1022 sub esc_param {
1023         my $str = shift;
1024         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
1025         $str =~ s/\+/%2B/g;
1026         $str =~ s/ /\+/g;
1027         return $str;
1028 }
1029
1030 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1031 sub esc_url {
1032         my $str = shift;
1033         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1034         $str =~ s/\+/%2B/g;
1035         $str =~ s/ /\+/g;
1036         return $str;
1037 }
1038
1039 # replace invalid utf8 character with SUBSTITUTION sequence
1040 sub esc_html ($;%) {
1041         my $str = shift;
1042         my %opts = @_;
1043
1044         $str = to_utf8($str);
1045         $str = $cgi->escapeHTML($str);
1046         if ($opts{'-nbsp'}) {
1047                 $str =~ s/ /&nbsp;/g;
1048         }
1049         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1050         return $str;
1051 }
1052
1053 # quote control characters and escape filename to HTML
1054 sub esc_path {
1055         my $str = shift;
1056         my %opts = @_;
1057
1058         $str = to_utf8($str);
1059         $str = $cgi->escapeHTML($str);
1060         if ($opts{'-nbsp'}) {
1061                 $str =~ s/ /&nbsp;/g;
1062         }
1063         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1064         return $str;
1065 }
1066
1067 # Make control characters "printable", using character escape codes (CEC)
1068 sub quot_cec {
1069         my $cntrl = shift;
1070         my %opts = @_;
1071         my %es = ( # character escape codes, aka escape sequences
1072                 "\t" => '\t',   # tab            (HT)
1073                 "\n" => '\n',   # line feed      (LF)
1074                 "\r" => '\r',   # carrige return (CR)
1075                 "\f" => '\f',   # form feed      (FF)
1076                 "\b" => '\b',   # backspace      (BS)
1077                 "\a" => '\a',   # alarm (bell)   (BEL)
1078                 "\e" => '\e',   # escape         (ESC)
1079                 "\013" => '\v', # vertical tab   (VT)
1080                 "\000" => '\0', # nul character  (NUL)
1081         );
1082         my $chr = ( (exists $es{$cntrl})
1083                     ? $es{$cntrl}
1084                     : sprintf('\%2x', ord($cntrl)) );
1085         if ($opts{-nohtml}) {
1086                 return $chr;
1087         } else {
1088                 return "<span class=\"cntrl\">$chr</span>";
1089         }
1090 }
1091
1092 # Alternatively use unicode control pictures codepoints,
1093 # Unicode "printable representation" (PR)
1094 sub quot_upr {
1095         my $cntrl = shift;
1096         my %opts = @_;
1097
1098         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1099         if ($opts{-nohtml}) {
1100                 return $chr;
1101         } else {
1102                 return "<span class=\"cntrl\">$chr</span>";
1103         }
1104 }
1105
1106 # git may return quoted and escaped filenames
1107 sub unquote {
1108         my $str = shift;
1109
1110         sub unq {
1111                 my $seq = shift;
1112                 my %es = ( # character escape codes, aka escape sequences
1113                         't' => "\t",   # tab            (HT, TAB)
1114                         'n' => "\n",   # newline        (NL)
1115                         'r' => "\r",   # return         (CR)
1116                         'f' => "\f",   # form feed      (FF)
1117                         'b' => "\b",   # backspace      (BS)
1118                         'a' => "\a",   # alarm (bell)   (BEL)
1119                         'e' => "\e",   # escape         (ESC)
1120                         'v' => "\013", # vertical tab   (VT)
1121                 );
1122
1123                 if ($seq =~ m/^[0-7]{1,3}$/) {
1124                         # octal char sequence
1125                         return chr(oct($seq));
1126                 } elsif (exists $es{$seq}) {
1127                         # C escape sequence, aka character escape code
1128                         return $es{$seq};
1129                 }
1130                 # quoted ordinary character
1131                 return $seq;
1132         }
1133
1134         if ($str =~ m/^"(.*)"$/) {
1135                 # needs unquoting
1136                 $str = $1;
1137                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1138         }
1139         return $str;
1140 }
1141
1142 # escape tabs (convert tabs to spaces)
1143 sub untabify {
1144         my $line = shift;
1145
1146         while ((my $pos = index($line, "\t")) != -1) {
1147                 if (my $count = (8 - ($pos % 8))) {
1148                         my $spaces = ' ' x $count;
1149                         $line =~ s/\t/$spaces/;
1150                 }
1151         }
1152
1153         return $line;
1154 }
1155
1156 sub project_in_list {
1157         my $project = shift;
1158         my @list = git_get_projects_list();
1159         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1160 }
1161
1162 ## ----------------------------------------------------------------------
1163 ## HTML aware string manipulation
1164
1165 # Try to chop given string on a word boundary between position
1166 # $len and $len+$add_len. If there is no word boundary there,
1167 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1168 # (marking chopped part) would be longer than given string.
1169 sub chop_str {
1170         my $str = shift;
1171         my $len = shift;
1172         my $add_len = shift || 10;
1173         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1174
1175         # Make sure perl knows it is utf8 encoded so we don't
1176         # cut in the middle of a utf8 multibyte char.
1177         $str = to_utf8($str);
1178
1179         # allow only $len chars, but don't cut a word if it would fit in $add_len
1180         # if it doesn't fit, cut it if it's still longer than the dots we would add
1181         # remove chopped character entities entirely
1182
1183         # when chopping in the middle, distribute $len into left and right part
1184         # return early if chopping wouldn't make string shorter
1185         if ($where eq 'center') {
1186                 return $str if ($len + 5 >= length($str)); # filler is length 5
1187                 $len = int($len/2);
1188         } else {
1189                 return $str if ($len + 4 >= length($str)); # filler is length 4
1190         }
1191
1192         # regexps: ending and beginning with word part up to $add_len
1193         my $endre = qr/.{$len}\w{0,$add_len}/;
1194         my $begre = qr/\w{0,$add_len}.{$len}/;
1195
1196         if ($where eq 'left') {
1197                 $str =~ m/^(.*?)($begre)$/;
1198                 my ($lead, $body) = ($1, $2);
1199                 if (length($lead) > 4) {
1200                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
1201                         $lead = " ...";
1202                 }
1203                 return "$lead$body";
1204
1205         } elsif ($where eq 'center') {
1206                 $str =~ m/^($endre)(.*)$/;
1207                 my ($left, $str)  = ($1, $2);
1208                 $str =~ m/^(.*?)($begre)$/;
1209                 my ($mid, $right) = ($1, $2);
1210                 if (length($mid) > 5) {
1211                         $left  =~ s/&[^;]*$//;
1212                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
1213                         $mid = " ... ";
1214                 }
1215                 return "$left$mid$right";
1216
1217         } else {
1218                 $str =~ m/^($endre)(.*)$/;
1219                 my $body = $1;
1220                 my $tail = $2;
1221                 if (length($tail) > 4) {
1222                         $body =~ s/&[^;]*$//;
1223                         $tail = "... ";
1224                 }
1225                 return "$body$tail";
1226         }
1227 }
1228
1229 # takes the same arguments as chop_str, but also wraps a <span> around the
1230 # result with a title attribute if it does get chopped. Additionally, the
1231 # string is HTML-escaped.
1232 sub chop_and_escape_str {
1233         my ($str) = @_;
1234
1235         my $chopped = chop_str(@_);
1236         if ($chopped eq $str) {
1237                 return esc_html($chopped);
1238         } else {
1239                 $str =~ s/([[:cntrl:]])/?/g;
1240                 return $cgi->span({-title=>$str}, esc_html($chopped));
1241         }
1242 }
1243
1244 ## ----------------------------------------------------------------------
1245 ## functions returning short strings
1246
1247 # CSS class for given age value (in seconds)
1248 sub age_class {
1249         my $age = shift;
1250
1251         if (!defined $age) {
1252                 return "noage";
1253         } elsif ($age < 60*60*2) {
1254                 return "age0";
1255         } elsif ($age < 60*60*24*2) {
1256                 return "age1";
1257         } else {
1258                 return "age2";
1259         }
1260 }
1261
1262 # convert age in seconds to "nn units ago" string
1263 sub age_string {
1264         my $age = shift;
1265         my $age_str;
1266
1267         if ($age > 60*60*24*365*2) {
1268                 $age_str = (int $age/60/60/24/365);
1269                 $age_str .= " years ago";
1270         } elsif ($age > 60*60*24*(365/12)*2) {
1271                 $age_str = int $age/60/60/24/(365/12);
1272                 $age_str .= " months ago";
1273         } elsif ($age > 60*60*24*7*2) {
1274                 $age_str = int $age/60/60/24/7;
1275                 $age_str .= " weeks ago";
1276         } elsif ($age > 60*60*24*2) {
1277                 $age_str = int $age/60/60/24;
1278                 $age_str .= " days ago";
1279         } elsif ($age > 60*60*2) {
1280                 $age_str = int $age/60/60;
1281                 $age_str .= " hours ago";
1282         } elsif ($age > 60*2) {
1283                 $age_str = int $age/60;
1284                 $age_str .= " min ago";
1285         } elsif ($age > 2) {
1286                 $age_str = int $age;
1287                 $age_str .= " sec ago";
1288         } else {
1289                 $age_str .= " right now";
1290         }
1291         return $age_str;
1292 }
1293
1294 use constant {
1295         S_IFINVALID => 0030000,
1296         S_IFGITLINK => 0160000,
1297 };
1298
1299 # submodule/subproject, a commit object reference
1300 sub S_ISGITLINK($) {
1301         my $mode = shift;
1302
1303         return (($mode & S_IFMT) == S_IFGITLINK)
1304 }
1305
1306 # convert file mode in octal to symbolic file mode string
1307 sub mode_str {
1308         my $mode = oct shift;
1309
1310         if (S_ISGITLINK($mode)) {
1311                 return 'm---------';
1312         } elsif (S_ISDIR($mode & S_IFMT)) {
1313                 return 'drwxr-xr-x';
1314         } elsif (S_ISLNK($mode)) {
1315                 return 'lrwxrwxrwx';
1316         } elsif (S_ISREG($mode)) {
1317                 # git cares only about the executable bit
1318                 if ($mode & S_IXUSR) {
1319                         return '-rwxr-xr-x';
1320                 } else {
1321                         return '-rw-r--r--';
1322                 };
1323         } else {
1324                 return '----------';
1325         }
1326 }
1327
1328 # convert file mode in octal to file type string
1329 sub file_type {
1330         my $mode = shift;
1331
1332         if ($mode !~ m/^[0-7]+$/) {
1333                 return $mode;
1334         } else {
1335                 $mode = oct $mode;
1336         }
1337
1338         if (S_ISGITLINK($mode)) {
1339                 return "submodule";
1340         } elsif (S_ISDIR($mode & S_IFMT)) {
1341                 return "directory";
1342         } elsif (S_ISLNK($mode)) {
1343                 return "symlink";
1344         } elsif (S_ISREG($mode)) {
1345                 return "file";
1346         } else {
1347                 return "unknown";
1348         }
1349 }
1350
1351 # convert file mode in octal to file type description string
1352 sub file_type_long {
1353         my $mode = shift;
1354
1355         if ($mode !~ m/^[0-7]+$/) {
1356                 return $mode;
1357         } else {
1358                 $mode = oct $mode;
1359         }
1360
1361         if (S_ISGITLINK($mode)) {
1362                 return "submodule";
1363         } elsif (S_ISDIR($mode & S_IFMT)) {
1364                 return "directory";
1365         } elsif (S_ISLNK($mode)) {
1366                 return "symlink";
1367         } elsif (S_ISREG($mode)) {
1368                 if ($mode & S_IXUSR) {
1369                         return "executable";
1370                 } else {
1371                         return "file";
1372                 };
1373         } else {
1374                 return "unknown";
1375         }
1376 }
1377
1378
1379 ## ----------------------------------------------------------------------
1380 ## functions returning short HTML fragments, or transforming HTML fragments
1381 ## which don't belong to other sections
1382
1383 # format line of commit message.
1384 sub format_log_line_html {
1385         my $line = shift;
1386
1387         $line = esc_html($line, -nbsp=>1);
1388         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1389                 $cgi->a({-href => href(action=>"object", hash=>$1),
1390                                         -class => "text"}, $1);
1391         }eg;
1392
1393         return $line;
1394 }
1395
1396 # format marker of refs pointing to given object
1397
1398 # the destination action is chosen based on object type and current context:
1399 # - for annotated tags, we choose the tag view unless it's the current view
1400 #   already, in which case we go to shortlog view
1401 # - for other refs, we keep the current view if we're in history, shortlog or
1402 #   log view, and select shortlog otherwise
1403 sub format_ref_marker {
1404         my ($refs, $id) = @_;
1405         my $markers = '';
1406
1407         if (defined $refs->{$id}) {
1408                 foreach my $ref (@{$refs->{$id}}) {
1409                         # this code exploits the fact that non-lightweight tags are the
1410                         # only indirect objects, and that they are the only objects for which
1411                         # we want to use tag instead of shortlog as action
1412                         my ($type, $name) = qw();
1413                         my $indirect = ($ref =~ s/\^\{\}$//);
1414                         # e.g. tags/v2.6.11 or heads/next
1415                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1416                                 $type = $1;
1417                                 $name = $2;
1418                         } else {
1419                                 $type = "ref";
1420                                 $name = $ref;
1421                         }
1422
1423                         my $class = $type;
1424                         $class .= " indirect" if $indirect;
1425
1426                         my $dest_action = "shortlog";
1427
1428                         if ($indirect) {
1429                                 $dest_action = "tag" unless $action eq "tag";
1430                         } elsif ($action =~ /^(history|(short)?log)$/) {
1431                                 $dest_action = $action;
1432                         }
1433
1434                         my $dest = "";
1435                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1436                         $dest .= $ref;
1437
1438                         my $link = $cgi->a({
1439                                 -href => href(
1440                                         action=>$dest_action,
1441                                         hash=>$dest
1442                                 )}, $name);
1443
1444                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1445                                 $link . "</span>";
1446                 }
1447         }
1448
1449         if ($markers) {
1450                 return ' <span class="refs">'. $markers . '</span>';
1451         } else {
1452                 return "";
1453         }
1454 }
1455
1456 # format, perhaps shortened and with markers, title line
1457 sub format_subject_html {
1458         my ($long, $short, $href, $extra) = @_;
1459         $extra = '' unless defined($extra);
1460
1461         if (length($short) < length($long)) {
1462                 return $cgi->a({-href => $href, -class => "list subject",
1463                                 -title => to_utf8($long)},
1464                        esc_html($short) . $extra);
1465         } else {
1466                 return $cgi->a({-href => $href, -class => "list subject"},
1467                        esc_html($long)  . $extra);
1468         }
1469 }
1470
1471 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1472 sub format_git_diff_header_line {
1473         my $line = shift;
1474         my $diffinfo = shift;
1475         my ($from, $to) = @_;
1476
1477         if ($diffinfo->{'nparents'}) {
1478                 # combined diff
1479                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1480                 if ($to->{'href'}) {
1481                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1482                                          esc_path($to->{'file'}));
1483                 } else { # file was deleted (no href)
1484                         $line .= esc_path($to->{'file'});
1485                 }
1486         } else {
1487                 # "ordinary" diff
1488                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1489                 if ($from->{'href'}) {
1490                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1491                                          'a/' . esc_path($from->{'file'}));
1492                 } else { # file was added (no href)
1493                         $line .= 'a/' . esc_path($from->{'file'});
1494                 }
1495                 $line .= ' ';
1496                 if ($to->{'href'}) {
1497                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1498                                          'b/' . esc_path($to->{'file'}));
1499                 } else { # file was deleted
1500                         $line .= 'b/' . esc_path($to->{'file'});
1501                 }
1502         }
1503
1504         return "<div class=\"diff header\">$line</div>\n";
1505 }
1506
1507 # format extended diff header line, before patch itself
1508 sub format_extended_diff_header_line {
1509         my $line = shift;
1510         my $diffinfo = shift;
1511         my ($from, $to) = @_;
1512
1513         # match <path>
1514         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1515                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1516                                        esc_path($from->{'file'}));
1517         }
1518         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1519                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1520                                  esc_path($to->{'file'}));
1521         }
1522         # match single <mode>
1523         if ($line =~ m/\s(\d{6})$/) {
1524                 $line .= '<span class="info"> (' .
1525                          file_type_long($1) .
1526                          ')</span>';
1527         }
1528         # match <hash>
1529         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1530                 # can match only for combined diff
1531                 $line = 'index ';
1532                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1533                         if ($from->{'href'}[$i]) {
1534                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1535                                                   -class=>"hash"},
1536                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1537                         } else {
1538                                 $line .= '0' x 7;
1539                         }
1540                         # separator
1541                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1542                 }
1543                 $line .= '..';
1544                 if ($to->{'href'}) {
1545                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1546                                          substr($diffinfo->{'to_id'},0,7));
1547                 } else {
1548                         $line .= '0' x 7;
1549                 }
1550
1551         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1552                 # can match only for ordinary diff
1553                 my ($from_link, $to_link);
1554                 if ($from->{'href'}) {
1555                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1556                                              substr($diffinfo->{'from_id'},0,7));
1557                 } else {
1558                         $from_link = '0' x 7;
1559                 }
1560                 if ($to->{'href'}) {
1561                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1562                                            substr($diffinfo->{'to_id'},0,7));
1563                 } else {
1564                         $to_link = '0' x 7;
1565                 }
1566                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1567                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1568         }
1569
1570         return $line . "<br/>\n";
1571 }
1572
1573 # format from-file/to-file diff header
1574 sub format_diff_from_to_header {
1575         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1576         my $line;
1577         my $result = '';
1578
1579         $line = $from_line;
1580         #assert($line =~ m/^---/) if DEBUG;
1581         # no extra formatting for "^--- /dev/null"
1582         if (! $diffinfo->{'nparents'}) {
1583                 # ordinary (single parent) diff
1584                 if ($line =~ m!^--- "?a/!) {
1585                         if ($from->{'href'}) {
1586                                 $line = '--- a/' .
1587                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1588                                                 esc_path($from->{'file'}));
1589                         } else {
1590                                 $line = '--- a/' .
1591                                         esc_path($from->{'file'});
1592                         }
1593                 }
1594                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1595
1596         } else {
1597                 # combined diff (merge commit)
1598                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1599                         if ($from->{'href'}[$i]) {
1600                                 $line = '--- ' .
1601                                         $cgi->a({-href=>href(action=>"blobdiff",
1602                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1603                                                              hash_parent_base=>$parents[$i],
1604                                                              file_parent=>$from->{'file'}[$i],
1605                                                              hash=>$diffinfo->{'to_id'},
1606                                                              hash_base=>$hash,
1607                                                              file_name=>$to->{'file'}),
1608                                                  -class=>"path",
1609                                                  -title=>"diff" . ($i+1)},
1610                                                 $i+1) .
1611                                         '/' .
1612                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1613                                                 esc_path($from->{'file'}[$i]));
1614                         } else {
1615                                 $line = '--- /dev/null';
1616                         }
1617                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1618                 }
1619         }
1620
1621         $line = $to_line;
1622         #assert($line =~ m/^\+\+\+/) if DEBUG;
1623         # no extra formatting for "^+++ /dev/null"
1624         if ($line =~ m!^\+\+\+ "?b/!) {
1625                 if ($to->{'href'}) {
1626                         $line = '+++ b/' .
1627                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1628                                         esc_path($to->{'file'}));
1629                 } else {
1630                         $line = '+++ b/' .
1631                                 esc_path($to->{'file'});
1632                 }
1633         }
1634         $result .= qq!<div class="diff to_file">$line</div>\n!;
1635
1636         return $result;
1637 }
1638
1639 # create note for patch simplified by combined diff
1640 sub format_diff_cc_simplified {
1641         my ($diffinfo, @parents) = @_;
1642         my $result = '';
1643
1644         $result .= "<div class=\"diff header\">" .
1645                    "diff --cc ";
1646         if (!is_deleted($diffinfo)) {
1647                 $result .= $cgi->a({-href => href(action=>"blob",
1648                                                   hash_base=>$hash,
1649                                                   hash=>$diffinfo->{'to_id'},
1650                                                   file_name=>$diffinfo->{'to_file'}),
1651                                     -class => "path"},
1652                                    esc_path($diffinfo->{'to_file'}));
1653         } else {
1654                 $result .= esc_path($diffinfo->{'to_file'});
1655         }
1656         $result .= "</div>\n" . # class="diff header"
1657                    "<div class=\"diff nodifferences\">" .
1658                    "Simple merge" .
1659                    "</div>\n"; # class="diff nodifferences"
1660
1661         return $result;
1662 }
1663
1664 # format patch (diff) line (not to be used for diff headers)
1665 sub format_diff_line {
1666         my $line = shift;
1667         my ($from, $to) = @_;
1668         my $diff_class = "";
1669
1670         chomp $line;
1671
1672         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1673                 # combined diff
1674                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1675                 if ($line =~ m/^\@{3}/) {
1676                         $diff_class = " chunk_header";
1677                 } elsif ($line =~ m/^\\/) {
1678                         $diff_class = " incomplete";
1679                 } elsif ($prefix =~ tr/+/+/) {
1680                         $diff_class = " add";
1681                 } elsif ($prefix =~ tr/-/-/) {
1682                         $diff_class = " rem";
1683                 }
1684         } else {
1685                 # assume ordinary diff
1686                 my $char = substr($line, 0, 1);
1687                 if ($char eq '+') {
1688                         $diff_class = " add";
1689                 } elsif ($char eq '-') {
1690                         $diff_class = " rem";
1691                 } elsif ($char eq '@') {
1692                         $diff_class = " chunk_header";
1693                 } elsif ($char eq "\\") {
1694                         $diff_class = " incomplete";
1695                 }
1696         }
1697         $line = untabify($line);
1698         if ($from && $to && $line =~ m/^\@{2} /) {
1699                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1700                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1701
1702                 $from_lines = 0 unless defined $from_lines;
1703                 $to_lines   = 0 unless defined $to_lines;
1704
1705                 if ($from->{'href'}) {
1706                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1707                                              -class=>"list"}, $from_text);
1708                 }
1709                 if ($to->{'href'}) {
1710                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1711                                              -class=>"list"}, $to_text);
1712                 }
1713                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1714                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1715                 return "<div class=\"diff$diff_class\">$line</div>\n";
1716         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1717                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1718                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1719
1720                 @from_text = split(' ', $ranges);
1721                 for (my $i = 0; $i < @from_text; ++$i) {
1722                         ($from_start[$i], $from_nlines[$i]) =
1723                                 (split(',', substr($from_text[$i], 1)), 0);
1724                 }
1725
1726                 $to_text   = pop @from_text;
1727                 $to_start  = pop @from_start;
1728                 $to_nlines = pop @from_nlines;
1729
1730                 $line = "<span class=\"chunk_info\">$prefix ";
1731                 for (my $i = 0; $i < @from_text; ++$i) {
1732                         if ($from->{'href'}[$i]) {
1733                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1734                                                   -class=>"list"}, $from_text[$i]);
1735                         } else {
1736                                 $line .= $from_text[$i];
1737                         }
1738                         $line .= " ";
1739                 }
1740                 if ($to->{'href'}) {
1741                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1742                                           -class=>"list"}, $to_text);
1743                 } else {
1744                         $line .= $to_text;
1745                 }
1746                 $line .= " $prefix</span>" .
1747                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1748                 return "<div class=\"diff$diff_class\">$line</div>\n";
1749         }
1750         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1751 }
1752
1753 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1754 # linked.  Pass the hash of the tree/commit to snapshot.
1755 sub format_snapshot_links {
1756         my ($hash) = @_;
1757         my $num_fmts = @snapshot_fmts;
1758         if ($num_fmts > 1) {
1759                 # A parenthesized list of links bearing format names.
1760                 # e.g. "snapshot (_tar.gz_ _zip_)"
1761                 return "snapshot (" . join(' ', map
1762                         $cgi->a({
1763                                 -href => href(
1764                                         action=>"snapshot",
1765                                         hash=>$hash,
1766                                         snapshot_format=>$_
1767                                 )
1768                         }, $known_snapshot_formats{$_}{'display'})
1769                 , @snapshot_fmts) . ")";
1770         } elsif ($num_fmts == 1) {
1771                 # A single "snapshot" link whose tooltip bears the format name.
1772                 # i.e. "_snapshot_"
1773                 my ($fmt) = @snapshot_fmts;
1774                 return
1775                         $cgi->a({
1776                                 -href => href(
1777                                         action=>"snapshot",
1778                                         hash=>$hash,
1779                                         snapshot_format=>$fmt
1780                                 ),
1781                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1782                         }, "snapshot");
1783         } else { # $num_fmts == 0
1784                 return undef;
1785         }
1786 }
1787
1788 ## ......................................................................
1789 ## functions returning values to be passed, perhaps after some
1790 ## transformation, to other functions; e.g. returning arguments to href()
1791
1792 # returns hash to be passed to href to generate gitweb URL
1793 # in -title key it returns description of link
1794 sub get_feed_info {
1795         my $format = shift || 'Atom';
1796         my %res = (action => lc($format));
1797
1798         # feed links are possible only for project views
1799         return unless (defined $project);
1800         # some views should link to OPML, or to generic project feed,
1801         # or don't have specific feed yet (so they should use generic)
1802         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1803
1804         my $branch;
1805         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1806         # from tag links; this also makes possible to detect branch links
1807         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1808             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1809                 $branch = $1;
1810         }
1811         # find log type for feed description (title)
1812         my $type = 'log';
1813         if (defined $file_name) {
1814                 $type  = "history of $file_name";
1815                 $type .= "/" if ($action eq 'tree');
1816                 $type .= " on '$branch'" if (defined $branch);
1817         } else {
1818                 $type = "log of $branch" if (defined $branch);
1819         }
1820
1821         $res{-title} = $type;
1822         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1823         $res{'file_name'} = $file_name;
1824
1825         return %res;
1826 }
1827
1828 ## ----------------------------------------------------------------------
1829 ## git utility subroutines, invoking git commands
1830
1831 # returns path to the core git executable and the --git-dir parameter as list
1832 sub git_cmd {
1833         return $GIT, '--git-dir='.$git_dir;
1834 }
1835
1836 # quote the given arguments for passing them to the shell
1837 # quote_command("command", "arg 1", "arg with ' and ! characters")
1838 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1839 # Try to avoid using this function wherever possible.
1840 sub quote_command {
1841         return join(' ',
1842                     map( { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ ));
1843 }
1844
1845 # get HEAD ref of given project as hash
1846 sub git_get_head_hash {
1847         my $project = shift;
1848         my $o_git_dir = $git_dir;
1849         my $retval = undef;
1850         $git_dir = "$projectroot/$project";
1851         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1852                 my $head = <$fd>;
1853                 close $fd;
1854                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1855                         $retval = $1;
1856                 }
1857         }
1858         if (defined $o_git_dir) {
1859                 $git_dir = $o_git_dir;
1860         }
1861         return $retval;
1862 }
1863
1864 # get type of given object
1865 sub git_get_type {
1866         my $hash = shift;
1867
1868         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1869         my $type = <$fd>;
1870         close $fd or return;
1871         chomp $type;
1872         return $type;
1873 }
1874
1875 # repository configuration
1876 our $config_file = '';
1877 our %config;
1878
1879 # store multiple values for single key as anonymous array reference
1880 # single values stored directly in the hash, not as [ <value> ]
1881 sub hash_set_multi {
1882         my ($hash, $key, $value) = @_;
1883
1884         if (!exists $hash->{$key}) {
1885                 $hash->{$key} = $value;
1886         } elsif (!ref $hash->{$key}) {
1887                 $hash->{$key} = [ $hash->{$key}, $value ];
1888         } else {
1889                 push @{$hash->{$key}}, $value;
1890         }
1891 }
1892
1893 # return hash of git project configuration
1894 # optionally limited to some section, e.g. 'gitweb'
1895 sub git_parse_project_config {
1896         my $section_regexp = shift;
1897         my %config;
1898
1899         local $/ = "\0";
1900
1901         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1902                 or return;
1903
1904         while (my $keyval = <$fh>) {
1905                 chomp $keyval;
1906                 my ($key, $value) = split(/\n/, $keyval, 2);
1907
1908                 hash_set_multi(\%config, $key, $value)
1909                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1910         }
1911         close $fh;
1912
1913         return %config;
1914 }
1915
1916 # convert config value to boolean: 'true' or 'false'
1917 # no value, number > 0, 'true' and 'yes' values are true
1918 # rest of values are treated as false (never as error)
1919 sub config_to_bool {
1920         my $val = shift;
1921
1922         return 1 if !defined $val;             # section.key
1923
1924         # strip leading and trailing whitespace
1925         $val =~ s/^\s+//;
1926         $val =~ s/\s+$//;
1927
1928         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
1929                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1930 }
1931
1932 # convert config value to simple decimal number
1933 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1934 # to be multiplied by 1024, 1048576, or 1073741824
1935 sub config_to_int {
1936         my $val = shift;
1937
1938         # strip leading and trailing whitespace
1939         $val =~ s/^\s+//;
1940         $val =~ s/\s+$//;
1941
1942         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1943                 $unit = lc($unit);
1944                 # unknown unit is treated as 1
1945                 return $num * ($unit eq 'g' ? 1073741824 :
1946                                $unit eq 'm' ?    1048576 :
1947                                $unit eq 'k' ?       1024 : 1);
1948         }
1949         return $val;
1950 }
1951
1952 # convert config value to array reference, if needed
1953 sub config_to_multi {
1954         my $val = shift;
1955
1956         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1957 }
1958
1959 sub git_get_project_config {
1960         my ($key, $type) = @_;
1961
1962         # key sanity check
1963         return unless ($key);
1964         $key =~ s/^gitweb\.//;
1965         return if ($key =~ m/\W/);
1966
1967         # type sanity check
1968         if (defined $type) {
1969                 $type =~ s/^--//;
1970                 $type = undef
1971                         unless ($type eq 'bool' || $type eq 'int');
1972         }
1973
1974         # get config
1975         if (!defined $config_file ||
1976             $config_file ne "$git_dir/config") {
1977                 %config = git_parse_project_config('gitweb');
1978                 $config_file = "$git_dir/config";
1979         }
1980
1981         # check if config variable (key) exists
1982         return unless exists $config{"gitweb.$key"};
1983
1984         # ensure given type
1985         if (!defined $type) {
1986                 return $config{"gitweb.$key"};
1987         } elsif ($type eq 'bool') {
1988                 # backward compatibility: 'git config --bool' returns true/false
1989                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1990         } elsif ($type eq 'int') {
1991                 return config_to_int($config{"gitweb.$key"});
1992         }
1993         return $config{"gitweb.$key"};
1994 }
1995
1996 # get hash of given path at given ref
1997 sub git_get_hash_by_path {
1998         my $base = shift;
1999         my $path = shift || return undef;
2000         my $type = shift;
2001
2002         $path =~ s,/+$,,;
2003
2004         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2005                 or die_error(500, "Open git-ls-tree failed");
2006         my $line = <$fd>;
2007         close $fd or return undef;
2008
2009         if (!defined $line) {
2010                 # there is no tree or hash given by $path at $base
2011                 return undef;
2012         }
2013
2014         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2015         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2016         if (defined $type && $type ne $2) {
2017                 # type doesn't match
2018                 return undef;
2019         }
2020         return $3;
2021 }
2022
2023 # get path of entry with given hash at given tree-ish (ref)
2024 # used to get 'from' filename for combined diff (merge commit) for renames
2025 sub git_get_path_by_hash {
2026         my $base = shift || return;
2027         my $hash = shift || return;
2028
2029         local $/ = "\0";
2030
2031         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2032                 or return undef;
2033         while (my $line = <$fd>) {
2034                 chomp $line;
2035
2036                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2037                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2038                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2039                         close $fd;
2040                         return $1;
2041                 }
2042         }
2043         close $fd;
2044         return undef;
2045 }
2046
2047 ## ......................................................................
2048 ## git utility functions, directly accessing git repository
2049
2050 sub git_get_project_description {
2051         my $path = shift;
2052
2053         $git_dir = "$projectroot/$path";
2054         open my $fd, "$git_dir/description"
2055                 or return git_get_project_config('description');
2056         my $descr = <$fd>;
2057         close $fd;
2058         if (defined $descr) {
2059                 chomp $descr;
2060         }
2061         return $descr;
2062 }
2063
2064 sub git_get_project_ctags {
2065         my $path = shift;
2066         my $ctags = {};
2067
2068         $git_dir = "$projectroot/$path";
2069         unless (opendir D, "$git_dir/ctags") {
2070                 return $ctags;
2071         }
2072         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir(D)) {
2073                 open 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 D;
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(MIME, $mimemap) or return undef;
2809         while (<MIME>) {
2810                 next if m/^#/; # skip comments
2811                 my ($mime, $exts) = split(/\t+/);
2812                 if (defined $exts) {
2813                         my @exts = split(/\s+/, $exts);
2814                         foreach my $ext (@exts) {
2815                                 $mimemap{$ext} = $mime;
2816                         }
2817                 }
2818         }
2819         close(MIME);
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 sub git_print_authorship {
3219         my $co = shift;
3220
3221         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3222         print "<div class=\"author_date\">" .
3223               esc_html($co->{'author_name'}) .
3224               " [$ad{'rfc2822'}";
3225         if ($ad{'hour_local'} < 6) {
3226                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3227                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3228         } else {
3229                 printf(" (%02d:%02d %s)",
3230                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3231         }
3232         print "]</div>\n";
3233 }
3234
3235 sub git_print_page_path {
3236         my $name = shift;
3237         my $type = shift;
3238         my $hb = shift;
3239
3240
3241         print "<div class=\"page_path\">";
3242         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3243                       -title => 'tree root'}, to_utf8("[$project]"));
3244         print " / ";
3245         if (defined $name) {
3246                 my @dirname = split '/', $name;
3247                 my $basename = pop @dirname;
3248                 my $fullname = '';
3249
3250                 foreach my $dir (@dirname) {
3251                         $fullname .= ($fullname ? '/' : '') . $dir;
3252                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3253                                                      hash_base=>$hb),
3254                                       -title => $fullname}, esc_path($dir));
3255                         print " / ";
3256                 }
3257                 if (defined $type && $type eq 'blob') {
3258                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3259                                                      hash_base=>$hb),
3260                                       -title => $name}, esc_path($basename));
3261                 } elsif (defined $type && $type eq 'tree') {
3262                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3263                                                      hash_base=>$hb),
3264                                       -title => $name}, esc_path($basename));
3265                         print " / ";
3266                 } else {
3267                         print esc_path($basename);
3268                 }
3269         }
3270         print "<br/></div>\n";
3271 }
3272
3273 # sub git_print_log (\@;%) {
3274 sub git_print_log ($;%) {
3275         my $log = shift;
3276         my %opts = @_;
3277
3278         if ($opts{'-remove_title'}) {
3279                 # remove title, i.e. first line of log
3280                 shift @$log;
3281         }
3282         # remove leading empty lines
3283         while (defined $log->[0] && $log->[0] eq "") {
3284                 shift @$log;
3285         }
3286
3287         # print log
3288         my $signoff = 0;
3289         my $empty = 0;
3290         foreach my $line (@$log) {
3291                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3292                         $signoff = 1;
3293                         $empty = 0;
3294                         if (! $opts{'-remove_signoff'}) {
3295                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3296                                 next;
3297                         } else {
3298                                 # remove signoff lines
3299                                 next;
3300                         }
3301                 } else {
3302                         $signoff = 0;
3303                 }
3304
3305                 # print only one empty line
3306                 # do not print empty line after signoff
3307                 if ($line eq "") {
3308                         next if ($empty || $signoff);
3309                         $empty = 1;
3310                 } else {
3311                         $empty = 0;
3312                 }
3313
3314                 print format_log_line_html($line) . "<br/>\n";
3315         }
3316
3317         if ($opts{'-final_empty_line'}) {
3318                 # end with single empty line
3319                 print "<br/>\n" unless $empty;
3320         }
3321 }
3322
3323 # return link target (what link points to)
3324 sub git_get_link_target {
3325         my $hash = shift;
3326         my $link_target;
3327
3328         # read link
3329         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3330                 or return;
3331         {
3332                 local $/;
3333                 $link_target = <$fd>;
3334         }
3335         close $fd
3336                 or return;
3337
3338         return $link_target;
3339 }
3340
3341 # given link target, and the directory (basedir) the link is in,
3342 # return target of link relative to top directory (top tree);
3343 # return undef if it is not possible (including absolute links).
3344 sub normalize_link_target {
3345         my ($link_target, $basedir, $hash_base) = @_;
3346
3347         # we can normalize symlink target only if $hash_base is provided
3348         return unless $hash_base;
3349
3350         # absolute symlinks (beginning with '/') cannot be normalized
3351         return if (substr($link_target, 0, 1) eq '/');
3352
3353         # normalize link target to path from top (root) tree (dir)
3354         my $path;
3355         if ($basedir) {
3356                 $path = $basedir . '/' . $link_target;
3357         } else {
3358                 # we are in top (root) tree (dir)
3359                 $path = $link_target;
3360         }
3361
3362         # remove //, /./, and /../
3363         my @path_parts;
3364         foreach my $part (split('/', $path)) {
3365                 # discard '.' and ''
3366                 next if (!$part || $part eq '.');
3367                 # handle '..'
3368                 if ($part eq '..') {
3369                         if (@path_parts) {
3370                                 pop @path_parts;
3371                         } else {
3372                                 # link leads outside repository (outside top dir)
3373                                 return;
3374                         }
3375                 } else {
3376                         push @path_parts, $part;
3377                 }
3378         }
3379         $path = join('/', @path_parts);
3380
3381         return $path;
3382 }
3383
3384 # print tree entry (row of git_tree), but without encompassing <tr> element
3385 sub git_print_tree_entry {
3386         my ($t, $basedir, $hash_base, $have_blame) = @_;
3387
3388         my %base_key = ();
3389         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3390
3391         # The format of a table row is: mode list link.  Where mode is
3392         # the mode of the entry, list is the name of the entry, an href,
3393         # and link is the action links of the entry.
3394
3395         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3396         if ($t->{'type'} eq "blob") {
3397                 print "<td class=\"list\">" .
3398                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3399                                                file_name=>"$basedir$t->{'name'}", %base_key),
3400                                 -class => "list"}, esc_path($t->{'name'}));
3401                 if (S_ISLNK(oct $t->{'mode'})) {
3402                         my $link_target = git_get_link_target($t->{'hash'});
3403                         if ($link_target) {
3404                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
3405                                 if (defined $norm_target) {
3406                                         print " -> " .
3407                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3408                                                                      file_name=>$norm_target),
3409                                                        -title => $norm_target}, esc_path($link_target));
3410                                 } else {
3411                                         print " -> " . esc_path($link_target);
3412                                 }
3413                         }
3414                 }
3415                 print "</td>\n";
3416                 print "<td class=\"link\">";
3417                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3418                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3419                               "blob");
3420                 if ($have_blame) {
3421                         print " | " .
3422                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3423                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3424                                       "blame");
3425                 }
3426                 if (defined $hash_base) {
3427                         print " | " .
3428                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3429                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3430                                       "history");
3431                 }
3432                 print " | " .
3433                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3434                                                file_name=>"$basedir$t->{'name'}")},
3435                                 "raw");
3436                 print "</td>\n";
3437
3438         } elsif ($t->{'type'} eq "tree") {
3439                 print "<td class=\"list\">";
3440                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3441                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3442                               esc_path($t->{'name'}));
3443                 print "</td>\n";
3444                 print "<td class=\"link\">";
3445                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3446                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3447                               "tree");
3448                 if (defined $hash_base) {
3449                         print " | " .
3450                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3451                                                      file_name=>"$basedir$t->{'name'}")},
3452                                       "history");
3453                 }
3454                 print "</td>\n";
3455         } else {
3456                 # unknown object: we can only present history for it
3457                 # (this includes 'commit' object, i.e. submodule support)
3458                 print "<td class=\"list\">" .
3459                       esc_path($t->{'name'}) .
3460                       "</td>\n";
3461                 print "<td class=\"link\">";
3462                 if (defined $hash_base) {
3463                         print $cgi->a({-href => href(action=>"history",
3464                                                      hash_base=>$hash_base,
3465                                                      file_name=>"$basedir$t->{'name'}")},
3466                                       "history");
3467                 }
3468                 print "</td>\n";
3469         }
3470 }
3471
3472 ## ......................................................................
3473 ## functions printing large fragments of HTML
3474
3475 # get pre-image filenames for merge (combined) diff
3476 sub fill_from_file_info {
3477         my ($diff, @parents) = @_;
3478
3479         $diff->{'from_file'} = [ ];
3480         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3481         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3482                 if ($diff->{'status'}[$i] eq 'R' ||
3483                     $diff->{'status'}[$i] eq 'C') {
3484                         $diff->{'from_file'}[$i] =
3485                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3486                 }
3487         }
3488
3489         return $diff;
3490 }
3491
3492 # is current raw difftree line of file deletion
3493 sub is_deleted {
3494         my $diffinfo = shift;
3495
3496         return $diffinfo->{'to_id'} eq ('0' x 40);
3497 }
3498
3499 # does patch correspond to [previous] difftree raw line
3500 # $diffinfo  - hashref of parsed raw diff format
3501 # $patchinfo - hashref of parsed patch diff format
3502 #              (the same keys as in $diffinfo)
3503 sub is_patch_split {
3504         my ($diffinfo, $patchinfo) = @_;
3505
3506         return defined $diffinfo && defined $patchinfo
3507                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3508 }
3509
3510
3511 sub git_difftree_body {
3512         my ($difftree, $hash, @parents) = @_;
3513         my ($parent) = $parents[0];
3514         my $have_blame = gitweb_check_feature('blame');
3515         print "<div class=\"list_head\">\n";
3516         if ($#{$difftree} > 10) {
3517                 print(($#{$difftree} + 1) . " files changed:\n");
3518         }
3519         print "</div>\n";
3520
3521         print "<table class=\"" .
3522               (@parents > 1 ? "combined " : "") .
3523               "diff_tree\">\n";
3524
3525         # header only for combined diff in 'commitdiff' view
3526         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3527         if ($has_header) {
3528                 # table header
3529                 print "<thead><tr>\n" .
3530                        "<th></th><th></th>\n"; # filename, patchN link
3531                 for (my $i = 0; $i < @parents; $i++) {
3532                         my $par = $parents[$i];
3533                         print "<th>" .
3534                               $cgi->a({-href => href(action=>"commitdiff",
3535                                                      hash=>$hash, hash_parent=>$par),
3536                                        -title => 'commitdiff to parent number ' .
3537                                                   ($i+1) . ': ' . substr($par,0,7)},
3538                                       $i+1) .
3539                               "&nbsp;</th>\n";
3540                 }
3541                 print "</tr></thead>\n<tbody>\n";
3542         }
3543
3544         my $alternate = 1;
3545         my $patchno = 0;
3546         foreach my $line (@{$difftree}) {
3547                 my $diff = parsed_difftree_line($line);
3548
3549                 if ($alternate) {
3550                         print "<tr class=\"dark\">\n";
3551                 } else {
3552                         print "<tr class=\"light\">\n";
3553                 }
3554                 $alternate ^= 1;
3555
3556                 if (exists $diff->{'nparents'}) { # combined diff
3557
3558                         fill_from_file_info($diff, @parents)
3559                                 unless exists $diff->{'from_file'};
3560
3561                         if (!is_deleted($diff)) {
3562                                 # file exists in the result (child) commit
3563                                 print "<td>" .
3564                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3565                                                              file_name=>$diff->{'to_file'},
3566                                                              hash_base=>$hash),
3567                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3568                                       "</td>\n";
3569                         } else {
3570                                 print "<td>" .
3571                                       esc_path($diff->{'to_file'}) .
3572                                       "</td>\n";
3573                         }
3574
3575                         if ($action eq 'commitdiff') {
3576                                 # link to patch
3577                                 $patchno++;
3578                                 print "<td class=\"link\">" .
3579                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3580                                       " | " .
3581                                       "</td>\n";
3582                         }
3583
3584                         my $has_history = 0;
3585                         my $not_deleted = 0;
3586                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3587                                 my $hash_parent = $parents[$i];
3588                                 my $from_hash = $diff->{'from_id'}[$i];
3589                                 my $from_path = $diff->{'from_file'}[$i];
3590                                 my $status = $diff->{'status'}[$i];
3591
3592                                 $has_history ||= ($status ne 'A');
3593                                 $not_deleted ||= ($status ne 'D');
3594
3595                                 if ($status eq 'A') {
3596                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3597                                 } elsif ($status eq 'D') {
3598                                         print "<td class=\"link\">" .
3599                                               $cgi->a({-href => href(action=>"blob",
3600                                                                      hash_base=>$hash,
3601                                                                      hash=>$from_hash,
3602                                                                      file_name=>$from_path)},
3603                                                       "blob" . ($i+1)) .
3604                                               " | </td>\n";
3605                                 } else {
3606                                         if ($diff->{'to_id'} eq $from_hash) {
3607                                                 print "<td class=\"link nochange\">";
3608                                         } else {
3609                                                 print "<td class=\"link\">";
3610                                         }
3611                                         print $cgi->a({-href => href(action=>"blobdiff",
3612                                                                      hash=>$diff->{'to_id'},
3613                                                                      hash_parent=>$from_hash,
3614                                                                      hash_base=>$hash,
3615                                                                      hash_parent_base=>$hash_parent,
3616                                                                      file_name=>$diff->{'to_file'},
3617                                                                      file_parent=>$from_path)},
3618                                                       "diff" . ($i+1)) .
3619                                               " | </td>\n";
3620                                 }
3621                         }
3622
3623                         print "<td class=\"link\">";
3624                         if ($not_deleted) {
3625                                 print $cgi->a({-href => href(action=>"blob",
3626                                                              hash=>$diff->{'to_id'},
3627                                                              file_name=>$diff->{'to_file'},
3628                                                              hash_base=>$hash)},
3629                                               "blob");
3630                                 print " | " if ($has_history);
3631                         }
3632                         if ($has_history) {
3633                                 print $cgi->a({-href => href(action=>"history",
3634                                                              file_name=>$diff->{'to_file'},
3635                                                              hash_base=>$hash)},
3636                                               "history");
3637                         }
3638                         print "</td>\n";
3639
3640                         print "</tr>\n";
3641                         next; # instead of 'else' clause, to avoid extra indent
3642                 }
3643                 # else ordinary diff
3644
3645                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3646                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3647                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3648                         $to_mode_oct = oct $diff->{'to_mode'};
3649                         if (S_ISREG($to_mode_oct)) { # only for regular file
3650                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3651                         }
3652                         $to_file_type = file_type($diff->{'to_mode'});
3653                 }
3654                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3655                         $from_mode_oct = oct $diff->{'from_mode'};
3656                         if (S_ISREG($to_mode_oct)) { # only for regular file
3657                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3658                         }
3659                         $from_file_type = file_type($diff->{'from_mode'});
3660                 }
3661
3662                 if ($diff->{'status'} eq "A") { # created
3663                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3664                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3665                         $mode_chng   .= "]</span>";
3666                         print "<td>";
3667                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3668                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3669                                       -class => "list"}, esc_path($diff->{'file'}));
3670                         print "</td>\n";
3671                         print "<td>$mode_chng</td>\n";
3672                         print "<td class=\"link\">";
3673                         if ($action eq 'commitdiff') {
3674                                 # link to patch
3675                                 $patchno++;
3676                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3677                                 print " | ";
3678                         }
3679                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3680                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3681                                       "blob");
3682                         print "</td>\n";
3683
3684                 } elsif ($diff->{'status'} eq "D") { # deleted
3685                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3686                         print "<td>";
3687                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3688                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3689                                        -class => "list"}, esc_path($diff->{'file'}));
3690                         print "</td>\n";
3691                         print "<td>$mode_chng</td>\n";
3692                         print "<td class=\"link\">";
3693                         if ($action eq 'commitdiff') {
3694                                 # link to patch
3695                                 $patchno++;
3696                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3697                                 print " | ";
3698                         }
3699                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3700                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3701                                       "blob") . " | ";
3702                         if ($have_blame) {
3703                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3704                                                              file_name=>$diff->{'file'})},
3705                                               "blame") . " | ";
3706                         }
3707                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3708                                                      file_name=>$diff->{'file'})},
3709                                       "history");
3710                         print "</td>\n";
3711
3712                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3713                         my $mode_chnge = "";
3714                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3715                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3716                                 if ($from_file_type ne $to_file_type) {
3717                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3718                                 }
3719                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3720                                         if ($from_mode_str && $to_mode_str) {
3721                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3722                                         } elsif ($to_mode_str) {
3723                                                 $mode_chnge .= " mode: $to_mode_str";
3724                                         }
3725                                 }
3726                                 $mode_chnge .= "]</span>\n";
3727                         }
3728                         print "<td>";
3729                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3730                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3731                                       -class => "list"}, esc_path($diff->{'file'}));
3732                         print "</td>\n";
3733                         print "<td>$mode_chnge</td>\n";
3734                         print "<td class=\"link\">";
3735                         if ($action eq 'commitdiff') {
3736                                 # link to patch
3737                                 $patchno++;
3738                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3739                                       " | ";
3740                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3741                                 # "commit" view and modified file (not onlu mode changed)
3742                                 print $cgi->a({-href => href(action=>"blobdiff",
3743                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3744                                                              hash_base=>$hash, hash_parent_base=>$parent,
3745                                                              file_name=>$diff->{'file'})},
3746                                               "diff") .
3747                                       " | ";
3748                         }
3749                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3750                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3751                                        "blob") . " | ";
3752                         if ($have_blame) {
3753                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3754                                                              file_name=>$diff->{'file'})},
3755                                               "blame") . " | ";
3756                         }
3757                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3758                                                      file_name=>$diff->{'file'})},
3759                                       "history");
3760                         print "</td>\n";
3761
3762                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3763                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3764                         my $nstatus = $status_name{$diff->{'status'}};
3765                         my $mode_chng = "";
3766                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3767                                 # mode also for directories, so we cannot use $to_mode_str
3768                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3769                         }
3770                         print "<td>" .
3771                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3772                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3773                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3774                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3775                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3776                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3777                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3778                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3779                               "<td class=\"link\">";
3780                         if ($action eq 'commitdiff') {
3781                                 # link to patch
3782                                 $patchno++;
3783                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3784                                       " | ";
3785                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3786                                 # "commit" view and modified file (not only pure rename or copy)
3787                                 print $cgi->a({-href => href(action=>"blobdiff",
3788                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3789                                                              hash_base=>$hash, hash_parent_base=>$parent,
3790                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3791                                               "diff") .
3792                                       " | ";
3793                         }
3794                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3795                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3796                                       "blob") . " | ";
3797                         if ($have_blame) {
3798                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3799                                                              file_name=>$diff->{'to_file'})},
3800                                               "blame") . " | ";
3801                         }
3802                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3803                                                     file_name=>$diff->{'to_file'})},
3804                                       "history");
3805                         print "</td>\n";
3806
3807                 } # we should not encounter Unmerged (U) or Unknown (X) status
3808                 print "</tr>\n";
3809         }
3810         print "</tbody>" if $has_header;
3811         print "</table>\n";
3812 }
3813
3814 sub git_patchset_body {
3815         my ($fd, $difftree, $hash, @hash_parents) = @_;
3816         my ($hash_parent) = $hash_parents[0];
3817
3818         my $is_combined = (@hash_parents > 1);
3819         my $patch_idx = 0;
3820         my $patch_number = 0;
3821         my $patch_line;
3822         my $diffinfo;
3823         my $to_name;
3824         my (%from, %to);
3825
3826         print "<div class=\"patchset\">\n";
3827
3828         # skip to first patch
3829         while ($patch_line = <$fd>) {
3830                 chomp $patch_line;
3831
3832                 last if ($patch_line =~ m/^diff /);
3833         }
3834
3835  PATCH:
3836         while ($patch_line) {
3837
3838                 # parse "git diff" header line
3839                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3840                         # $1 is from_name, which we do not use
3841                         $to_name = unquote($2);
3842                         $to_name =~ s!^b/!!;
3843                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3844                         # $1 is 'cc' or 'combined', which we do not use
3845                         $to_name = unquote($2);
3846                 } else {
3847                         $to_name = undef;
3848                 }
3849
3850                 # check if current patch belong to current raw line
3851                 # and parse raw git-diff line if needed
3852                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3853                         # this is continuation of a split patch
3854                         print "<div class=\"patch cont\">\n";
3855                 } else {
3856                         # advance raw git-diff output if needed
3857                         $patch_idx++ if defined $diffinfo;
3858
3859                         # read and prepare patch information
3860                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3861
3862                         # compact combined diff output can have some patches skipped
3863                         # find which patch (using pathname of result) we are at now;
3864                         if ($is_combined) {
3865                                 while ($to_name ne $diffinfo->{'to_file'}) {
3866                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3867                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3868                                               "</div>\n";  # class="patch"
3869
3870                                         $patch_idx++;
3871                                         $patch_number++;
3872
3873                                         last if $patch_idx > $#$difftree;
3874                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3875                                 }
3876                         }
3877
3878                         # modifies %from, %to hashes
3879                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3880
3881                         # this is first patch for raw difftree line with $patch_idx index
3882                         # we index @$difftree array from 0, but number patches from 1
3883                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3884                 }
3885
3886                 # git diff header
3887                 #assert($patch_line =~ m/^diff /) if DEBUG;
3888                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3889                 $patch_number++;
3890                 # print "git diff" header
3891                 print format_git_diff_header_line($patch_line, $diffinfo,
3892                                                   \%from, \%to);
3893
3894                 # print extended diff header
3895                 print "<div class=\"diff extended_header\">\n";
3896         EXTENDED_HEADER:
3897                 while ($patch_line = <$fd>) {
3898                         chomp $patch_line;
3899
3900                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3901
3902                         print format_extended_diff_header_line($patch_line, $diffinfo,
3903                                                                \%from, \%to);
3904                 }
3905                 print "</div>\n"; # class="diff extended_header"
3906
3907                 # from-file/to-file diff header
3908                 if (! $patch_line) {
3909                         print "</div>\n"; # class="patch"
3910                         last PATCH;
3911                 }
3912                 next PATCH if ($patch_line =~ m/^diff /);
3913                 #assert($patch_line =~ m/^---/) if DEBUG;
3914
3915                 my $last_patch_line = $patch_line;
3916                 $patch_line = <$fd>;
3917                 chomp $patch_line;
3918                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3919
3920                 print format_diff_from_to_header($last_patch_line, $patch_line,
3921                                                  $diffinfo, \%from, \%to,
3922                                                  @hash_parents);
3923
3924                 # the patch itself
3925         LINE:
3926                 while ($patch_line = <$fd>) {
3927                         chomp $patch_line;
3928
3929                         next PATCH if ($patch_line =~ m/^diff /);
3930
3931                         print format_diff_line($patch_line, \%from, \%to);
3932                 }
3933
3934         } continue {
3935                 print "</div>\n"; # class="patch"
3936         }
3937
3938         # for compact combined (--cc) format, with chunk and patch simpliciaction
3939         # patchset might be empty, but there might be unprocessed raw lines
3940         for (++$patch_idx if $patch_number > 0;
3941              $patch_idx < @$difftree;
3942              ++$patch_idx) {
3943                 # read and prepare patch information
3944                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3945
3946                 # generate anchor for "patch" links in difftree / whatchanged part
3947                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3948                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3949                       "</div>\n";  # class="patch"
3950
3951                 $patch_number++;
3952         }
3953
3954         if ($patch_number == 0) {
3955                 if (@hash_parents > 1) {
3956                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3957                 } else {
3958                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3959                 }
3960         }
3961
3962         print "</div>\n"; # class="patchset"
3963 }
3964
3965 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3966
3967 # fills project list info (age, description, owner, forks) for each
3968 # project in the list, removing invalid projects from returned list
3969 # NOTE: modifies $projlist, but does not remove entries from it
3970 sub fill_project_list_info {
3971         my ($projlist, $check_forks) = @_;
3972         my @projects;
3973
3974         my $show_ctags = gitweb_check_feature('ctags');
3975  PROJECT:
3976         foreach my $pr (@$projlist) {
3977                 my (@activity) = git_get_last_activity($pr->{'path'});
3978                 unless (@activity) {
3979                         next PROJECT;
3980                 }
3981                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
3982                 if (!defined $pr->{'descr'}) {
3983                         my $descr = git_get_project_description($pr->{'path'}) || "";
3984                         $descr = to_utf8($descr);
3985                         $pr->{'descr_long'} = $descr;
3986                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3987                 }
3988                 if (!defined $pr->{'owner'}) {
3989                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3990                 }
3991                 if ($check_forks) {
3992                         my $pname = $pr->{'path'};
3993                         if (($pname =~ s/\.git$//) &&
3994                             ($pname !~ /\/$/) &&
3995                             (-d "$projectroot/$pname")) {
3996                                 $pr->{'forks'} = "-d $projectroot/$pname";
3997                         }       else {
3998                                 $pr->{'forks'} = 0;
3999                         }
4000                 }
4001                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4002                 push @projects, $pr;
4003         }
4004
4005         return @projects;
4006 }
4007
4008 # print 'sort by' <th> element, generating 'sort by $name' replay link
4009 # if that order is not selected
4010 sub print_sort_th {
4011         my ($name, $order, $header) = @_;
4012         $header ||= ucfirst($name);
4013
4014         if ($order eq $name) {
4015                 print "<th>$header</th>\n";
4016         } else {
4017                 print "<th>" .
4018                       $cgi->a({-href => href(-replay=>1, order=>$name),
4019                                -class => "header"}, $header) .
4020                       "</th>\n";
4021         }
4022 }
4023
4024 sub git_project_list_body {
4025         # actually uses global variable $project
4026         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4027
4028         my $check_forks = gitweb_check_feature('forks');
4029         my @projects = fill_project_list_info($projlist, $check_forks);
4030
4031         $order ||= $default_projects_order;
4032         $from = 0 unless defined $from;
4033         $to = $#projects if (!defined $to || $#projects < $to);
4034
4035         my %order_info = (
4036                 project => { key => 'path', type => 'str' },
4037                 descr => { key => 'descr_long', type => 'str' },
4038                 owner => { key => 'owner', type => 'str' },
4039                 age => { key => 'age', type => 'num' }
4040         );
4041         my $oi = $order_info{$order};
4042         if ($oi->{'type'} eq 'str') {
4043                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4044         } else {
4045                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4046         }
4047
4048         my $show_ctags = gitweb_check_feature('ctags');
4049         if ($show_ctags) {
4050                 my %ctags;
4051                 foreach my $p (@projects) {
4052                         foreach my $ct (keys %{$p->{'ctags'}}) {
4053                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4054                         }
4055                 }
4056                 my $cloud = git_populate_project_tagcloud(\%ctags);
4057                 print git_show_project_tagcloud($cloud, 64);
4058         }
4059
4060         print "<table class=\"project_list\">\n";
4061         unless ($no_header) {
4062                 print "<tr>\n";
4063                 if ($check_forks) {
4064                         print "<th></th>\n";
4065                 }
4066                 print_sort_th('project', $order, 'Project');
4067                 print_sort_th('descr', $order, 'Description');
4068                 print_sort_th('owner', $order, 'Owner');
4069                 print_sort_th('age', $order, 'Last Change');
4070                 print "<th></th>\n" . # for links
4071                       "</tr>\n";
4072         }
4073         my $alternate = 1;
4074         my $tagfilter = $cgi->param('by_tag');
4075         for (my $i = $from; $i <= $to; $i++) {
4076                 my $pr = $projects[$i];
4077
4078                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4079                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4080                         and not $pr->{'descr_long'} =~ /$searchtext/;
4081                 # Weed out forks or non-matching entries of search
4082                 if ($check_forks) {
4083                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4084                         $forkbase="^$forkbase" if $forkbase;
4085                         next if not $searchtext and not $tagfilter and $show_ctags
4086                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4087                 }
4088
4089                 if ($alternate) {
4090                         print "<tr class=\"dark\">\n";
4091                 } else {
4092                         print "<tr class=\"light\">\n";
4093                 }
4094                 $alternate ^= 1;
4095                 if ($check_forks) {
4096                         print "<td>";
4097                         if ($pr->{'forks'}) {
4098                                 print "<!-- $pr->{'forks'} -->\n";
4099                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4100                         }
4101                         print "</td>\n";
4102                 }
4103                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4104                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4105                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4106                                         -class => "list", -title => $pr->{'descr_long'}},
4107                                         esc_html($pr->{'descr'})) . "</td>\n" .
4108                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4109                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4110                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4111                       "<td class=\"link\">" .
4112                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4113                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4114                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4115                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4116                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4117                       "</td>\n" .
4118                       "</tr>\n";
4119         }
4120         if (defined $extra) {
4121                 print "<tr>\n";
4122                 if ($check_forks) {
4123                         print "<td></td>\n";
4124                 }
4125                 print "<td colspan=\"5\">$extra</td>\n" .
4126                       "</tr>\n";
4127         }
4128         print "</table>\n";
4129 }
4130
4131 sub git_shortlog_body {
4132         # uses global variable $project
4133         my ($commitlist, $from, $to, $refs, $extra) = @_;
4134
4135         $from = 0 unless defined $from;
4136         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4137
4138         print "<table class=\"shortlog\">\n";
4139         my $alternate = 1;
4140         for (my $i = $from; $i <= $to; $i++) {
4141                 my %co = %{$commitlist->[$i]};
4142                 my $commit = $co{'id'};
4143                 my $ref = format_ref_marker($refs, $commit);
4144                 if ($alternate) {
4145                         print "<tr class=\"dark\">\n";
4146                 } else {
4147                         print "<tr class=\"light\">\n";
4148                 }
4149                 $alternate ^= 1;
4150                 my $author = chop_and_escape_str($co{'author_name'}, 10);
4151                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4152                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4153                       "<td><i>" . $author . "</i></td>\n" .
4154                       "<td>";
4155                 print format_subject_html($co{'title'}, $co{'title_short'},
4156                                           href(action=>"commit", hash=>$commit), $ref);
4157                 print "</td>\n" .
4158                       "<td class=\"link\">" .
4159                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4160                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4161                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4162                 my $snapshot_links = format_snapshot_links($commit);
4163                 if (defined $snapshot_links) {
4164                         print " | " . $snapshot_links;
4165                 }
4166                 print "</td>\n" .
4167                       "</tr>\n";
4168         }
4169         if (defined $extra) {
4170                 print "<tr>\n" .
4171                       "<td colspan=\"4\">$extra</td>\n" .
4172                       "</tr>\n";
4173         }
4174         print "</table>\n";
4175 }
4176
4177 sub git_history_body {
4178         # Warning: assumes constant type (blob or tree) during history
4179         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4180
4181         $from = 0 unless defined $from;
4182         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4183
4184         print "<table class=\"history\">\n";
4185         my $alternate = 1;
4186         for (my $i = $from; $i <= $to; $i++) {
4187                 my %co = %{$commitlist->[$i]};
4188                 if (!%co) {
4189                         next;
4190                 }
4191                 my $commit = $co{'id'};
4192
4193                 my $ref = format_ref_marker($refs, $commit);
4194
4195                 if ($alternate) {
4196                         print "<tr class=\"dark\">\n";
4197                 } else {
4198                         print "<tr class=\"light\">\n";
4199                 }
4200                 $alternate ^= 1;
4201         # shortlog uses      chop_str($co{'author_name'}, 10)
4202                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
4203                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4204                       "<td><i>" . $author . "</i></td>\n" .
4205                       "<td>";
4206                 # originally git_history used chop_str($co{'title'}, 50)
4207                 print format_subject_html($co{'title'}, $co{'title_short'},
4208                                           href(action=>"commit", hash=>$commit), $ref);
4209                 print "</td>\n" .
4210                       "<td class=\"link\">" .
4211                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4212                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4213
4214                 if ($ftype eq 'blob') {
4215                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4216                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4217                         if (defined $blob_current && defined $blob_parent &&
4218                                         $blob_current ne $blob_parent) {
4219                                 print " | " .
4220                                         $cgi->a({-href => href(action=>"blobdiff",
4221                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4222                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4223                                                                file_name=>$file_name)},
4224                                                 "diff to current");
4225                         }
4226                 }
4227                 print "</td>\n" .
4228                       "</tr>\n";
4229         }
4230         if (defined $extra) {
4231                 print "<tr>\n" .
4232                       "<td colspan=\"4\">$extra</td>\n" .
4233                       "</tr>\n";
4234         }
4235         print "</table>\n";
4236 }
4237
4238 sub git_tags_body {
4239         # uses global variable $project
4240         my ($taglist, $from, $to, $extra) = @_;
4241         $from = 0 unless defined $from;
4242         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4243
4244         print "<table class=\"tags\">\n";
4245         my $alternate = 1;
4246         for (my $i = $from; $i <= $to; $i++) {
4247                 my $entry = $taglist->[$i];
4248                 my %tag = %$entry;
4249                 my $comment = $tag{'subject'};
4250                 my $comment_short;
4251                 if (defined $comment) {
4252                         $comment_short = chop_str($comment, 30, 5);
4253                 }
4254                 if ($alternate) {
4255                         print "<tr class=\"dark\">\n";
4256                 } else {
4257                         print "<tr class=\"light\">\n";
4258                 }
4259                 $alternate ^= 1;
4260                 if (defined $tag{'age'}) {
4261                         print "<td><i>$tag{'age'}</i></td>\n";
4262                 } else {
4263                         print "<td></td>\n";
4264                 }
4265                 print "<td>" .
4266                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4267                                -class => "list name"}, esc_html($tag{'name'})) .
4268                       "</td>\n" .
4269                       "<td>";
4270                 if (defined $comment) {
4271                         print format_subject_html($comment, $comment_short,
4272                                                   href(action=>"tag", hash=>$tag{'id'}));
4273                 }
4274                 print "</td>\n" .
4275                       "<td class=\"selflink\">";
4276                 if ($tag{'type'} eq "tag") {
4277                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4278                 } else {
4279                         print "&nbsp;";
4280                 }
4281                 print "</td>\n" .
4282                       "<td class=\"link\">" . " | " .
4283                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4284                 if ($tag{'reftype'} eq "commit") {
4285                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4286                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4287                 } elsif ($tag{'reftype'} eq "blob") {
4288                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4289                 }
4290                 print "</td>\n" .
4291                       "</tr>";
4292         }
4293         if (defined $extra) {
4294                 print "<tr>\n" .
4295                       "<td colspan=\"5\">$extra</td>\n" .
4296                       "</tr>\n";
4297         }
4298         print "</table>\n";
4299 }
4300
4301 sub git_heads_body {
4302         # uses global variable $project
4303         my ($headlist, $head, $from, $to, $extra) = @_;
4304         $from = 0 unless defined $from;
4305         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4306
4307         print "<table class=\"heads\">\n";
4308         my $alternate = 1;
4309         for (my $i = $from; $i <= $to; $i++) {
4310                 my $entry = $headlist->[$i];
4311                 my %ref = %$entry;
4312                 my $curr = $ref{'id'} eq $head;
4313                 if ($alternate) {
4314                         print "<tr class=\"dark\">\n";
4315                 } else {
4316                         print "<tr class=\"light\">\n";
4317                 }
4318                 $alternate ^= 1;
4319                 print "<td><i>$ref{'age'}</i></td>\n" .
4320                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4321                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4322                                -class => "list name"},esc_html($ref{'name'})) .
4323                       "</td>\n" .
4324                       "<td class=\"link\">" .
4325                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4326                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4327                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4328                       "</td>\n" .
4329                       "</tr>";
4330         }
4331         if (defined $extra) {
4332                 print "<tr>\n" .
4333                       "<td colspan=\"3\">$extra</td>\n" .
4334                       "</tr>\n";
4335         }
4336         print "</table>\n";
4337 }
4338
4339 sub git_search_grep_body {
4340         my ($commitlist, $from, $to, $extra) = @_;
4341         $from = 0 unless defined $from;
4342         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4343
4344         print "<table class=\"commit_search\">\n";
4345         my $alternate = 1;
4346         for (my $i = $from; $i <= $to; $i++) {
4347                 my %co = %{$commitlist->[$i]};
4348                 if (!%co) {
4349                         next;
4350                 }
4351                 my $commit = $co{'id'};
4352                 if ($alternate) {
4353                         print "<tr class=\"dark\">\n";
4354                 } else {
4355                         print "<tr class=\"light\">\n";
4356                 }
4357                 $alternate ^= 1;
4358                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
4359                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4360                       "<td><i>" . $author . "</i></td>\n" .
4361                       "<td>" .
4362                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4363                                -class => "list subject"},
4364                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4365                 my $comment = $co{'comment'};
4366                 foreach my $line (@$comment) {
4367                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4368                                 my ($lead, $match, $trail) = ($1, $2, $3);
4369                                 $match = chop_str($match, 70, 5, 'center');
4370                                 my $contextlen = int((80 - length($match))/2);
4371                                 $contextlen = 30 if ($contextlen > 30);
4372                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4373                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4374
4375                                 $lead  = esc_html($lead);
4376                                 $match = esc_html($match);
4377                                 $trail = esc_html($trail);
4378
4379                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4380                         }
4381                 }
4382                 print "</td>\n" .
4383                       "<td class=\"link\">" .
4384                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4385                       " | " .
4386                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4387                       " | " .
4388                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4389                 print "</td>\n" .
4390                       "</tr>\n";
4391         }
4392         if (defined $extra) {
4393                 print "<tr>\n" .
4394                       "<td colspan=\"3\">$extra</td>\n" .
4395                       "</tr>\n";
4396         }
4397         print "</table>\n";
4398 }
4399
4400 ## ======================================================================
4401 ## ======================================================================
4402 ## actions
4403
4404 sub git_project_list {
4405         my $order = $input_params{'order'};
4406         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4407                 die_error(400, "Unknown order parameter");
4408         }
4409
4410         my @list = git_get_projects_list();
4411         if (!@list) {
4412                 die_error(404, "No projects found");
4413         }
4414
4415         git_header_html();
4416         if (-f $home_text) {
4417                 print "<div class=\"index_include\">\n";
4418                 insert_file($home_text);
4419                 print "</div>\n";
4420         }
4421         print $cgi->startform(-method => "get") .
4422               "<p class=\"projsearch\">Search:\n" .
4423               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4424               "</p>" .
4425               $cgi->end_form() . "\n";
4426         git_project_list_body(\@list, $order);
4427         git_footer_html();
4428 }
4429
4430 sub git_forks {
4431         my $order = $input_params{'order'};
4432         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4433                 die_error(400, "Unknown order parameter");
4434         }
4435
4436         my @list = git_get_projects_list($project);
4437         if (!@list) {
4438                 die_error(404, "No forks found");
4439         }
4440
4441         git_header_html();
4442         git_print_page_nav('','');
4443         git_print_header_div('summary', "$project forks");
4444         git_project_list_body(\@list, $order);
4445         git_footer_html();
4446 }
4447
4448 sub git_project_index {
4449         my @projects = git_get_projects_list($project);
4450
4451         print $cgi->header(
4452                 -type => 'text/plain',
4453                 -charset => 'utf-8',
4454                 -content_disposition => 'inline; filename="index.aux"');
4455
4456         foreach my $pr (@projects) {
4457                 if (!exists $pr->{'owner'}) {
4458                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4459                 }
4460
4461                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4462                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4463                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4464                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4465                 $path  =~ s/ /\+/g;
4466                 $owner =~ s/ /\+/g;
4467
4468                 print "$path $owner\n";
4469         }
4470 }
4471
4472 sub git_summary {
4473         my $descr = git_get_project_description($project) || "none";
4474         my %co = parse_commit("HEAD");
4475         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4476         my $head = $co{'id'};
4477
4478         my $owner = git_get_project_owner($project);
4479
4480         my $refs = git_get_references();
4481         # These get_*_list functions return one more to allow us to see if
4482         # there are more ...
4483         my @taglist  = git_get_tags_list(16);
4484         my @headlist = git_get_heads_list(16);
4485         my @forklist;
4486         my $check_forks = gitweb_check_feature('forks');
4487
4488         if ($check_forks) {
4489                 @forklist = git_get_projects_list($project);
4490         }
4491
4492         git_header_html();
4493         git_print_page_nav('summary','', $head);
4494
4495         print "<div class=\"title\">&nbsp;</div>\n";
4496         print "<table class=\"projects_list\">\n" .
4497               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4498               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4499         if (defined $cd{'rfc2822'}) {
4500                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4501         }
4502
4503         # use per project git URL list in $projectroot/$project/cloneurl
4504         # or make project git URL from git base URL and project name
4505         my $url_tag = "URL";
4506         my @url_list = git_get_project_url_list($project);
4507         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4508         foreach my $git_url (@url_list) {
4509                 next unless $git_url;
4510                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4511                 $url_tag = "";
4512         }
4513
4514         # Tag cloud
4515         my $show_ctags = gitweb_check_feature('ctags');
4516         if ($show_ctags) {
4517                 my $ctags = git_get_project_ctags($project);
4518                 my $cloud = git_populate_project_tagcloud($ctags);
4519                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4520                 print "</td>\n<td>" unless %$ctags;
4521                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4522                 print "</td>\n<td>" if %$ctags;
4523                 print git_show_project_tagcloud($cloud, 48);
4524                 print "</td></tr>";
4525         }
4526
4527         print "</table>\n";
4528
4529         # If XSS prevention is on, we don't include README.html.
4530         # TODO: Allow a readme in some safe format.
4531         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4532                 print "<div class=\"title\">readme</div>\n" .
4533                       "<div class=\"readme\">\n";
4534                 insert_file("$projectroot/$project/README.html");
4535                 print "\n</div>\n"; # class="readme"
4536         }
4537
4538         # we need to request one more than 16 (0..15) to check if
4539         # those 16 are all
4540         my @commitlist = $head ? parse_commits($head, 17) : ();
4541         if (@commitlist) {
4542                 git_print_header_div('shortlog');
4543                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4544                                   $#commitlist <=  15 ? undef :
4545                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4546         }
4547
4548         if (@taglist) {
4549                 git_print_header_div('tags');
4550                 git_tags_body(\@taglist, 0, 15,
4551                               $#taglist <=  15 ? undef :
4552                               $cgi->a({-href => href(action=>"tags")}, "..."));
4553         }
4554
4555         if (@headlist) {
4556                 git_print_header_div('heads');
4557                 git_heads_body(\@headlist, $head, 0, 15,
4558                                $#headlist <= 15 ? undef :
4559                                $cgi->a({-href => href(action=>"heads")}, "..."));
4560         }
4561
4562         if (@forklist) {
4563                 git_print_header_div('forks');
4564                 git_project_list_body(\@forklist, 'age', 0, 15,
4565                                       $#forklist <= 15 ? undef :
4566                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4567                                       'no_header');
4568         }
4569
4570         git_footer_html();
4571 }
4572
4573 sub git_tag {
4574         my $head = git_get_head_hash($project);
4575         git_header_html();
4576         git_print_page_nav('','', $head,undef,$head);
4577         my %tag = parse_tag($hash);
4578
4579         if (! %tag) {
4580                 die_error(404, "Unknown tag object");
4581         }
4582
4583         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4584         print "<div class=\"title_text\">\n" .
4585               "<table class=\"object_header\">\n" .
4586               "<tr>\n" .
4587               "<td>object</td>\n" .
4588               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4589                                $tag{'object'}) . "</td>\n" .
4590               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4591                                               $tag{'type'}) . "</td>\n" .
4592               "</tr>\n";
4593         if (defined($tag{'author'})) {
4594                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4595                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4596                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4597                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4598                         "</td></tr>\n";
4599         }
4600         print "</table>\n\n" .
4601               "</div>\n";
4602         print "<div class=\"page_body\">";
4603         my $comment = $tag{'comment'};
4604         foreach my $line (@$comment) {
4605                 chomp $line;
4606                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4607         }
4608         print "</div>\n";
4609         git_footer_html();
4610 }
4611
4612 sub git_blame {
4613         # permissions
4614         gitweb_check_feature('blame')
4615                 or die_error(403, "Blame view not allowed");
4616
4617         # error checking
4618         die_error(400, "No file name given") unless $file_name;
4619         $hash_base ||= git_get_head_hash($project);
4620         die_error(404, "Couldn't find base commit") unless $hash_base;
4621         my %co = parse_commit($hash_base)
4622                 or die_error(404, "Commit not found");
4623         my $ftype = "blob";
4624         if (!defined $hash) {
4625                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4626                         or die_error(404, "Error looking up file");
4627         } else {
4628                 $ftype = git_get_type($hash);
4629                 if ($ftype !~ "blob") {
4630                         die_error(400, "Object is not a blob");
4631                 }
4632         }
4633
4634         # run git-blame --porcelain
4635         open my $fd, "-|", git_cmd(), "blame", '-p',
4636                 $hash_base, '--', $file_name
4637                 or die_error(500, "Open git-blame failed");
4638
4639         # page header
4640         git_header_html();
4641         my $formats_nav =
4642                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4643                         "blob") .
4644                 " | " .
4645                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4646                         "history") .
4647                 " | " .
4648                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4649                         "HEAD");
4650         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4651         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4652         git_print_page_path($file_name, $ftype, $hash_base);
4653
4654         # page body
4655         my @rev_color = qw(light2 dark2);
4656         my $num_colors = scalar(@rev_color);
4657         my $current_color = 0;
4658         my %metainfo = ();
4659
4660         print <<HTML;
4661 <div class="page_body">
4662 <table class="blame">
4663 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4664 HTML
4665  LINE:
4666         while (my $line = <$fd>) {
4667                 chomp $line;
4668                 # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
4669                 # no <lines in group> for subsequent lines in group of lines
4670                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4671                    ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
4672                 if (!exists $metainfo{$full_rev}) {
4673                         $metainfo{$full_rev} = {};
4674                 }
4675                 my $meta = $metainfo{$full_rev};
4676                 my $data;
4677                 while ($data = <$fd>) {
4678                         chomp $data;
4679                         last if ($data =~ s/^\t//); # contents of line
4680                         if ($data =~ /^(\S+) (.*)$/) {
4681                                 $meta->{$1} = $2;
4682                         }
4683                 }
4684                 my $short_rev = substr($full_rev, 0, 8);
4685                 my $author = $meta->{'author'};
4686                 my %date =
4687                         parse_date($meta->{'author-time'}, $meta->{'author-tz'});
4688                 my $date = $date{'iso-tz'};
4689                 if ($group_size) {
4690                         $current_color = ($current_color + 1) % $num_colors;
4691                 }
4692                 print "<tr id=\"l$lineno\" class=\"$rev_color[$current_color]\">\n";
4693                 if ($group_size) {
4694                         print "<td class=\"sha1\"";
4695                         print " title=\"". esc_html($author) . ", $date\"";
4696                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4697                         print ">";
4698                         print $cgi->a({-href => href(action=>"commit",
4699                                                      hash=>$full_rev,
4700                                                      file_name=>$file_name)},
4701                                       esc_html($short_rev));
4702                         print "</td>\n";
4703                 }
4704                 my $parent_commit;
4705                 if (!exists $meta->{'parent'}) {
4706                         open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4707                                 or die_error(500, "Open git-rev-parse failed");
4708                         $parent_commit = <$dd>;
4709                         close $dd;
4710                         chomp($parent_commit);
4711                         $meta->{'parent'} = $parent_commit;
4712                 } else {
4713                         $parent_commit = $meta->{'parent'};
4714                 }
4715                 my $blamed = href(action => 'blame',
4716                                   file_name => $meta->{'filename'},
4717                                   hash_base => $parent_commit);
4718                 print "<td class=\"linenr\">";
4719                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4720                                 -class => "linenr" },
4721                               esc_html($lineno));
4722                 print "</td>";
4723                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4724                 print "</tr>\n";
4725         }
4726         print "</table>\n";
4727         print "</div>";
4728         close $fd
4729                 or print "Reading blob failed\n";
4730
4731         # page footer
4732         git_footer_html();
4733 }
4734
4735 sub git_tags {
4736         my $head = git_get_head_hash($project);
4737         git_header_html();
4738         git_print_page_nav('','', $head,undef,$head);
4739         git_print_header_div('summary', $project);
4740
4741         my @tagslist = git_get_tags_list();
4742         if (@tagslist) {
4743                 git_tags_body(\@tagslist);
4744         }
4745         git_footer_html();
4746 }
4747
4748 sub git_heads {
4749         my $head = git_get_head_hash($project);
4750         git_header_html();
4751         git_print_page_nav('','', $head,undef,$head);
4752         git_print_header_div('summary', $project);
4753
4754         my @headslist = git_get_heads_list();
4755         if (@headslist) {
4756                 git_heads_body(\@headslist, $head);
4757         }
4758         git_footer_html();
4759 }
4760
4761 sub git_blob_plain {
4762         my $type = shift;
4763         my $expires;
4764
4765         if (!defined $hash) {
4766                 if (defined $file_name) {
4767                         my $base = $hash_base || git_get_head_hash($project);
4768                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4769                                 or die_error(404, "Cannot find file");
4770                 } else {
4771                         die_error(400, "No file name defined");
4772                 }
4773         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4774                 # blobs defined by non-textual hash id's can be cached
4775                 $expires = "+1d";
4776         }
4777
4778         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4779                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4780
4781         # content-type (can include charset)
4782         $type = blob_contenttype($fd, $file_name, $type);
4783
4784         # "save as" filename, even when no $file_name is given
4785         my $save_as = "$hash";
4786         if (defined $file_name) {
4787                 $save_as = $file_name;
4788         } elsif ($type =~ m/^text\//) {
4789                 $save_as .= '.txt';
4790         }
4791
4792         # With XSS prevention on, blobs of all types except a few known safe
4793         # ones are served with "Content-Disposition: attachment" to make sure
4794         # they don't run in our security domain.  For certain image types,
4795         # blob view writes an <img> tag referring to blob_plain view, and we
4796         # want to be sure not to break that by serving the image as an
4797         # attachment (though Firefox 3 doesn't seem to care).
4798         my $sandbox = $prevent_xss &&
4799                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
4800
4801         print $cgi->header(
4802                 -type => $type,
4803                 -expires => $expires,
4804                 -content_disposition =>
4805                         ($sandbox ? 'attachment' : 'inline')
4806                         . '; filename="' . $save_as . '"');
4807         undef $/;
4808         binmode STDOUT, ':raw';
4809         print <$fd>;
4810         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4811         $/ = "\n";
4812         close $fd;
4813 }
4814
4815 sub git_blob {
4816         my $expires;
4817
4818         if (!defined $hash) {
4819                 if (defined $file_name) {
4820                         my $base = $hash_base || git_get_head_hash($project);
4821                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4822                                 or die_error(404, "Cannot find file");
4823                 } else {
4824                         die_error(400, "No file name defined");
4825                 }
4826         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4827                 # blobs defined by non-textual hash id's can be cached
4828                 $expires = "+1d";
4829         }
4830
4831         my $have_blame = gitweb_check_feature('blame');
4832         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4833                 or die_error(500, "Couldn't cat $file_name, $hash");
4834         my $mimetype = blob_mimetype($fd, $file_name);
4835         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4836                 close $fd;
4837                 return git_blob_plain($mimetype);
4838         }
4839         # we can have blame only for text/* mimetype
4840         $have_blame &&= ($mimetype =~ m!^text/!);
4841
4842         git_header_html(undef, $expires);
4843         my $formats_nav = '';
4844         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4845                 if (defined $file_name) {
4846                         if ($have_blame) {
4847                                 $formats_nav .=
4848                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4849                                                 "blame") .
4850                                         " | ";
4851                         }
4852                         $formats_nav .=
4853                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4854                                         "history") .
4855                                 " | " .
4856                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4857                                         "raw") .
4858                                 " | " .
4859                                 $cgi->a({-href => href(action=>"blob",
4860                                                        hash_base=>"HEAD", file_name=>$file_name)},
4861                                         "HEAD");
4862                 } else {
4863                         $formats_nav .=
4864                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4865                                         "raw");
4866                 }
4867                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4868                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4869         } else {
4870                 print "<div class=\"page_nav\">\n" .
4871                       "<br/><br/></div>\n" .
4872                       "<div class=\"title\">$hash</div>\n";
4873         }
4874         git_print_page_path($file_name, "blob", $hash_base);
4875         print "<div class=\"page_body\">\n";
4876         if ($mimetype =~ m!^image/!) {
4877                 print qq!<img type="$mimetype"!;
4878                 if ($file_name) {
4879                         print qq! alt="$file_name" title="$file_name"!;
4880                 }
4881                 print qq! src="! .
4882                       href(action=>"blob_plain", hash=>$hash,
4883                            hash_base=>$hash_base, file_name=>$file_name) .
4884                       qq!" />\n!;
4885         } else {
4886                 my $nr;
4887                 while (my $line = <$fd>) {
4888                         chomp $line;
4889                         $nr++;
4890                         $line = untabify($line);
4891                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4892                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4893                 }
4894         }
4895         close $fd
4896                 or print "Reading blob failed.\n";
4897         print "</div>";
4898         git_footer_html();
4899 }
4900
4901 sub git_tree {
4902         if (!defined $hash_base) {
4903                 $hash_base = "HEAD";
4904         }
4905         if (!defined $hash) {
4906                 if (defined $file_name) {
4907                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4908                 } else {
4909                         $hash = $hash_base;
4910                 }
4911         }
4912         die_error(404, "No such tree") unless defined($hash);
4913         $/ = "\0";
4914         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4915                 or die_error(500, "Open git-ls-tree failed");
4916         my @entries = map { chomp; $_ } <$fd>;
4917         close $fd or die_error(404, "Reading tree failed");
4918         $/ = "\n";
4919
4920         my $refs = git_get_references();
4921         my $ref = format_ref_marker($refs, $hash_base);
4922         git_header_html();
4923         my $basedir = '';
4924         my $have_blame = gitweb_check_feature('blame');
4925         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4926                 my @views_nav = ();
4927                 if (defined $file_name) {
4928                         push @views_nav,
4929                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4930                                         "history"),
4931                                 $cgi->a({-href => href(action=>"tree",
4932                                                        hash_base=>"HEAD", file_name=>$file_name)},
4933                                         "HEAD"),
4934                 }
4935                 my $snapshot_links = format_snapshot_links($hash);
4936                 if (defined $snapshot_links) {
4937                         # FIXME: Should be available when we have no hash base as well.
4938                         push @views_nav, $snapshot_links;
4939                 }
4940                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4941                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4942         } else {
4943                 undef $hash_base;
4944                 print "<div class=\"page_nav\">\n";
4945                 print "<br/><br/></div>\n";
4946                 print "<div class=\"title\">$hash</div>\n";
4947         }
4948         if (defined $file_name) {
4949                 $basedir = $file_name;
4950                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4951                         $basedir .= '/';
4952                 }
4953                 git_print_page_path($file_name, 'tree', $hash_base);
4954         }
4955         print "<div class=\"page_body\">\n";
4956         print "<table class=\"tree\">\n";
4957         my $alternate = 1;
4958         # '..' (top directory) link if possible
4959         if (defined $hash_base &&
4960             defined $file_name && $file_name =~ m![^/]+$!) {
4961                 if ($alternate) {
4962                         print "<tr class=\"dark\">\n";
4963                 } else {
4964                         print "<tr class=\"light\">\n";
4965                 }
4966                 $alternate ^= 1;
4967
4968                 my $up = $file_name;
4969                 $up =~ s!/?[^/]+$!!;
4970                 undef $up unless $up;
4971                 # based on git_print_tree_entry
4972                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4973                 print '<td class="list">';
4974                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4975                                              file_name=>$up)},
4976                               "..");
4977                 print "</td>\n";
4978                 print "<td class=\"link\"></td>\n";
4979
4980                 print "</tr>\n";
4981         }
4982         foreach my $line (@entries) {
4983                 my %t = parse_ls_tree_line($line, -z => 1);
4984
4985                 if ($alternate) {
4986                         print "<tr class=\"dark\">\n";
4987                 } else {
4988                         print "<tr class=\"light\">\n";
4989                 }
4990                 $alternate ^= 1;
4991
4992                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4993
4994                 print "</tr>\n";
4995         }
4996         print "</table>\n" .
4997               "</div>";
4998         git_footer_html();
4999 }
5000
5001 sub git_snapshot {
5002         my $format = $input_params{'snapshot_format'};
5003         if (!@snapshot_fmts) {
5004                 die_error(403, "Snapshots not allowed");
5005         }
5006         # default to first supported snapshot format
5007         $format ||= $snapshot_fmts[0];
5008         if ($format !~ m/^[a-z0-9]+$/) {
5009                 die_error(400, "Invalid snapshot format parameter");
5010         } elsif (!exists($known_snapshot_formats{$format})) {
5011                 die_error(400, "Unknown snapshot format");
5012         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5013                 die_error(403, "Unsupported snapshot format");
5014         }
5015
5016         if (!defined $hash) {
5017                 $hash = git_get_head_hash($project);
5018         }
5019
5020         my $name = $project;
5021         $name =~ s,([^/])/*\.git$,$1,;
5022         $name = basename($name);
5023         my $filename = to_utf8($name);
5024         $name =~ s/\047/\047\\\047\047/g;
5025         my $cmd;
5026         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
5027         $cmd = quote_command(
5028                 git_cmd(), 'archive',
5029                 "--format=$known_snapshot_formats{$format}{'format'}",
5030                 "--prefix=$name/", $hash);
5031         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5032                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5033         }
5034
5035         print $cgi->header(
5036                 -type => $known_snapshot_formats{$format}{'type'},
5037                 -content_disposition => 'inline; filename="' . "$filename" . '"',
5038                 -status => '200 OK');
5039
5040         open my $fd, "-|", $cmd
5041                 or die_error(500, "Execute git-archive failed");
5042         binmode STDOUT, ':raw';
5043         print <$fd>;
5044         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5045         close $fd;
5046 }
5047
5048 sub git_log {
5049         my $head = git_get_head_hash($project);
5050         if (!defined $hash) {
5051                 $hash = $head;
5052         }
5053         if (!defined $page) {
5054                 $page = 0;
5055         }
5056         my $refs = git_get_references();
5057
5058         my @commitlist = parse_commits($hash, 101, (100 * $page));
5059
5060         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
5061
5062         my ($patch_max) = gitweb_get_feature('patches');
5063         if ($patch_max) {
5064                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5065                         $paging_nav .= " &sdot; " .
5066                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5067                                         "patches");
5068                 }
5069         }
5070
5071         git_header_html();
5072         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5073
5074         if (!@commitlist) {
5075                 my %co = parse_commit($hash);
5076
5077                 git_print_header_div('summary', $project);
5078                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5079         }
5080         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5081         for (my $i = 0; $i <= $to; $i++) {
5082                 my %co = %{$commitlist[$i]};
5083                 next if !%co;
5084                 my $commit = $co{'id'};
5085                 my $ref = format_ref_marker($refs, $commit);
5086                 my %ad = parse_date($co{'author_epoch'});
5087                 git_print_header_div('commit',
5088                                "<span class=\"age\">$co{'age_string'}</span>" .
5089                                esc_html($co{'title'}) . $ref,
5090                                $commit);
5091                 print "<div class=\"title_text\">\n" .
5092                       "<div class=\"log_link\">\n" .
5093                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5094                       " | " .
5095                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5096                       " | " .
5097                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5098                       "<br/>\n" .
5099                       "</div>\n" .
5100                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
5101                       "</div>\n";
5102
5103                 print "<div class=\"log_body\">\n";
5104                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5105                 print "</div>\n";
5106         }
5107         if ($#commitlist >= 100) {
5108                 print "<div class=\"page_nav\">\n";
5109                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5110                                -accesskey => "n", -title => "Alt-n"}, "next");
5111                 print "</div>\n";
5112         }
5113         git_footer_html();
5114 }
5115
5116 sub git_commit {
5117         $hash ||= $hash_base || "HEAD";
5118         my %co = parse_commit($hash)
5119             or die_error(404, "Unknown commit object");
5120         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5121         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
5122
5123         my $parent  = $co{'parent'};
5124         my $parents = $co{'parents'}; # listref
5125
5126         # we need to prepare $formats_nav before any parameter munging
5127         my $formats_nav;
5128         if (!defined $parent) {
5129                 # --root commitdiff
5130                 $formats_nav .= '(initial)';
5131         } elsif (@$parents == 1) {
5132                 # single parent commit
5133                 $formats_nav .=
5134                         '(parent: ' .
5135                         $cgi->a({-href => href(action=>"commit",
5136                                                hash=>$parent)},
5137                                 esc_html(substr($parent, 0, 7))) .
5138                         ')';
5139         } else {
5140                 # merge commit
5141                 $formats_nav .=
5142                         '(merge: ' .
5143                         join(' ', map {
5144                                 $cgi->a({-href => href(action=>"commit",
5145                                                        hash=>$_)},
5146                                         esc_html(substr($_, 0, 7)));
5147                         } @$parents ) .
5148                         ')';
5149         }
5150         if (gitweb_check_feature('patches')) {
5151                 $formats_nav .= " | " .
5152                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5153                                 "patch");
5154         }
5155
5156         if (!defined $parent) {
5157                 $parent = "--root";
5158         }
5159         my @difftree;
5160         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5161                 @diff_opts,
5162                 (@$parents <= 1 ? $parent : '-c'),
5163                 $hash, "--"
5164                 or die_error(500, "Open git-diff-tree failed");
5165         @difftree = map { chomp; $_ } <$fd>;
5166         close $fd or die_error(404, "Reading git-diff-tree failed");
5167
5168         # non-textual hash id's can be cached
5169         my $expires;
5170         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5171                 $expires = "+1d";
5172         }
5173         my $refs = git_get_references();
5174         my $ref = format_ref_marker($refs, $co{'id'});
5175
5176         git_header_html(undef, $expires);
5177         git_print_page_nav('commit', '',
5178                            $hash, $co{'tree'}, $hash,
5179                            $formats_nav);
5180
5181         if (defined $co{'parent'}) {
5182                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5183         } else {
5184                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5185         }
5186         print "<div class=\"title_text\">\n" .
5187               "<table class=\"object_header\">\n";
5188         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
5189               "<tr>" .
5190               "<td></td><td> $ad{'rfc2822'}";
5191         if ($ad{'hour_local'} < 6) {
5192                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
5193                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5194         } else {
5195                 printf(" (%02d:%02d %s)",
5196                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5197         }
5198         print "</td>" .
5199               "</tr>\n";
5200         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
5201         print "<tr><td></td><td> $cd{'rfc2822'}" .
5202               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
5203               "</td></tr>\n";
5204         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5205         print "<tr>" .
5206               "<td>tree</td>" .
5207               "<td class=\"sha1\">" .
5208               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5209                        class => "list"}, $co{'tree'}) .
5210               "</td>" .
5211               "<td class=\"link\">" .
5212               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5213                       "tree");
5214         my $snapshot_links = format_snapshot_links($hash);
5215         if (defined $snapshot_links) {
5216                 print " | " . $snapshot_links;
5217         }
5218         print "</td>" .
5219               "</tr>\n";
5220
5221         foreach my $par (@$parents) {
5222                 print "<tr>" .
5223                       "<td>parent</td>" .
5224                       "<td class=\"sha1\">" .
5225                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5226                                class => "list"}, $par) .
5227                       "</td>" .
5228                       "<td class=\"link\">" .
5229                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5230                       " | " .
5231                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5232                       "</td>" .
5233                       "</tr>\n";
5234         }
5235         print "</table>".
5236               "</div>\n";
5237
5238         print "<div class=\"page_body\">\n";
5239         git_print_log($co{'comment'});
5240         print "</div>\n";
5241
5242         git_difftree_body(\@difftree, $hash, @$parents);
5243
5244         git_footer_html();
5245 }
5246
5247 sub git_object {
5248         # object is defined by:
5249         # - hash or hash_base alone
5250         # - hash_base and file_name
5251         my $type;
5252
5253         # - hash or hash_base alone
5254         if ($hash || ($hash_base && !defined $file_name)) {
5255                 my $object_id = $hash || $hash_base;
5256
5257                 open my $fd, "-|", quote_command(
5258                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5259                         or die_error(404, "Object does not exist");
5260                 $type = <$fd>;
5261                 chomp $type;
5262                 close $fd
5263                         or die_error(404, "Object does not exist");
5264
5265         # - hash_base and file_name
5266         } elsif ($hash_base && defined $file_name) {
5267                 $file_name =~ s,/+$,,;
5268
5269                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5270                         or die_error(404, "Base object does not exist");
5271
5272                 # here errors should not hapen
5273                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5274                         or die_error(500, "Open git-ls-tree failed");
5275                 my $line = <$fd>;
5276                 close $fd;
5277
5278                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5279                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5280                         die_error(404, "File or directory for given base does not exist");
5281                 }
5282                 $type = $2;
5283                 $hash = $3;
5284         } else {
5285                 die_error(400, "Not enough information to find object");
5286         }
5287
5288         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5289                                           hash=>$hash, hash_base=>$hash_base,
5290                                           file_name=>$file_name),
5291                              -status => '302 Found');
5292 }
5293
5294 sub git_blobdiff {
5295         my $format = shift || 'html';
5296
5297         my $fd;
5298         my @difftree;
5299         my %diffinfo;
5300         my $expires;
5301
5302         # preparing $fd and %diffinfo for git_patchset_body
5303         # new style URI
5304         if (defined $hash_base && defined $hash_parent_base) {
5305                 if (defined $file_name) {
5306                         # read raw output
5307                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5308                                 $hash_parent_base, $hash_base,
5309                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5310                                 or die_error(500, "Open git-diff-tree failed");
5311                         @difftree = map { chomp; $_ } <$fd>;
5312                         close $fd
5313                                 or die_error(404, "Reading git-diff-tree failed");
5314                         @difftree
5315                                 or die_error(404, "Blob diff not found");
5316
5317                 } elsif (defined $hash &&
5318                          $hash =~ /[0-9a-fA-F]{40}/) {
5319                         # try to find filename from $hash
5320
5321                         # read filtered raw output
5322                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5323                                 $hash_parent_base, $hash_base, "--"
5324                                 or die_error(500, "Open git-diff-tree failed");
5325                         @difftree =
5326                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5327                                 # $hash == to_id
5328                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5329                                 map { chomp; $_ } <$fd>;
5330                         close $fd
5331                                 or die_error(404, "Reading git-diff-tree failed");
5332                         @difftree
5333                                 or die_error(404, "Blob diff not found");
5334
5335                 } else {
5336                         die_error(400, "Missing one of the blob diff parameters");
5337                 }
5338
5339                 if (@difftree > 1) {
5340                         die_error(400, "Ambiguous blob diff specification");
5341                 }
5342
5343                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5344                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5345                 $file_name   ||= $diffinfo{'to_file'};
5346
5347                 $hash_parent ||= $diffinfo{'from_id'};
5348                 $hash        ||= $diffinfo{'to_id'};
5349
5350                 # non-textual hash id's can be cached
5351                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5352                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5353                         $expires = '+1d';
5354                 }
5355
5356                 # open patch output
5357                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5358                         '-p', ($format eq 'html' ? "--full-index" : ()),
5359                         $hash_parent_base, $hash_base,
5360                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5361                         or die_error(500, "Open git-diff-tree failed");
5362         }
5363
5364         # old/legacy style URI -- not generated anymore since 1.4.3.
5365         if (!%diffinfo) {
5366                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5367         }
5368
5369         # header
5370         if ($format eq 'html') {
5371                 my $formats_nav =
5372                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5373                                 "raw");
5374                 git_header_html(undef, $expires);
5375                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5376                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5377                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5378                 } else {
5379                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5380                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5381                 }
5382                 if (defined $file_name) {
5383                         git_print_page_path($file_name, "blob", $hash_base);
5384                 } else {
5385                         print "<div class=\"page_path\"></div>\n";
5386                 }
5387
5388         } elsif ($format eq 'plain') {
5389                 print $cgi->header(
5390                         -type => 'text/plain',
5391                         -charset => 'utf-8',
5392                         -expires => $expires,
5393                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5394
5395                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5396
5397         } else {
5398                 die_error(400, "Unknown blobdiff format");
5399         }
5400
5401         # patch
5402         if ($format eq 'html') {
5403                 print "<div class=\"page_body\">\n";
5404
5405                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5406                 close $fd;
5407
5408                 print "</div>\n"; # class="page_body"
5409                 git_footer_html();
5410
5411         } else {
5412                 while (my $line = <$fd>) {
5413                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5414                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5415
5416                         print $line;
5417
5418                         last if $line =~ m!^\+\+\+!;
5419                 }
5420                 local $/ = undef;
5421                 print <$fd>;
5422                 close $fd;
5423         }
5424 }
5425
5426 sub git_blobdiff_plain {
5427         git_blobdiff('plain');
5428 }
5429
5430 sub git_commitdiff {
5431         my %params = @_;
5432         my $format = $params{-format} || 'html';
5433
5434         my ($patch_max) = gitweb_get_feature('patches');
5435         if ($format eq 'patch') {
5436                 die_error(403, "Patch view not allowed") unless $patch_max;
5437         }
5438
5439         $hash ||= $hash_base || "HEAD";
5440         my %co = parse_commit($hash)
5441             or die_error(404, "Unknown commit object");
5442
5443         # choose format for commitdiff for merge
5444         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5445                 $hash_parent = '--cc';
5446         }
5447         # we need to prepare $formats_nav before almost any parameter munging
5448         my $formats_nav;
5449         if ($format eq 'html') {
5450                 $formats_nav =
5451                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5452                                 "raw");
5453                 if ($patch_max) {
5454                         $formats_nav .= " | " .
5455                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5456                                         "patch");
5457                 }
5458
5459                 if (defined $hash_parent &&
5460                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5461                         # commitdiff with two commits given
5462                         my $hash_parent_short = $hash_parent;
5463                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5464                                 $hash_parent_short = substr($hash_parent, 0, 7);
5465                         }
5466                         $formats_nav .=
5467                                 ' (from';
5468                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5469                                 if ($co{'parents'}[$i] eq $hash_parent) {
5470                                         $formats_nav .= ' parent ' . ($i+1);
5471                                         last;
5472                                 }
5473                         }
5474                         $formats_nav .= ': ' .
5475                                 $cgi->a({-href => href(action=>"commitdiff",
5476                                                        hash=>$hash_parent)},
5477                                         esc_html($hash_parent_short)) .
5478                                 ')';
5479                 } elsif (!$co{'parent'}) {
5480                         # --root commitdiff
5481                         $formats_nav .= ' (initial)';
5482                 } elsif (scalar @{$co{'parents'}} == 1) {
5483                         # single parent commit
5484                         $formats_nav .=
5485                                 ' (parent: ' .
5486                                 $cgi->a({-href => href(action=>"commitdiff",
5487                                                        hash=>$co{'parent'})},
5488                                         esc_html(substr($co{'parent'}, 0, 7))) .
5489                                 ')';
5490                 } else {
5491                         # merge commit
5492                         if ($hash_parent eq '--cc') {
5493                                 $formats_nav .= ' | ' .
5494                                         $cgi->a({-href => href(action=>"commitdiff",
5495                                                                hash=>$hash, hash_parent=>'-c')},
5496                                                 'combined');
5497                         } else { # $hash_parent eq '-c'
5498                                 $formats_nav .= ' | ' .
5499                                         $cgi->a({-href => href(action=>"commitdiff",
5500                                                                hash=>$hash, hash_parent=>'--cc')},
5501                                                 'compact');
5502                         }
5503                         $formats_nav .=
5504                                 ' (merge: ' .
5505                                 join(' ', map {
5506                                         $cgi->a({-href => href(action=>"commitdiff",
5507                                                                hash=>$_)},
5508                                                 esc_html(substr($_, 0, 7)));
5509                                 } @{$co{'parents'}} ) .
5510                                 ')';
5511                 }
5512         }
5513
5514         my $hash_parent_param = $hash_parent;
5515         if (!defined $hash_parent_param) {
5516                 # --cc for multiple parents, --root for parentless
5517                 $hash_parent_param =
5518                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5519         }
5520
5521         # read commitdiff
5522         my $fd;
5523         my @difftree;
5524         if ($format eq 'html') {
5525                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5526                         "--no-commit-id", "--patch-with-raw", "--full-index",
5527                         $hash_parent_param, $hash, "--"
5528                         or die_error(500, "Open git-diff-tree failed");
5529
5530                 while (my $line = <$fd>) {
5531                         chomp $line;
5532                         # empty line ends raw part of diff-tree output
5533                         last unless $line;
5534                         push @difftree, scalar parse_difftree_raw_line($line);
5535                 }
5536
5537         } elsif ($format eq 'plain') {
5538                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5539                         '-p', $hash_parent_param, $hash, "--"
5540                         or die_error(500, "Open git-diff-tree failed");
5541         } elsif ($format eq 'patch') {
5542                 # For commit ranges, we limit the output to the number of
5543                 # patches specified in the 'patches' feature.
5544                 # For single commits, we limit the output to a single patch,
5545                 # diverging from the git-format-patch default.
5546                 my @commit_spec = ();
5547                 if ($hash_parent) {
5548                         if ($patch_max > 0) {
5549                                 push @commit_spec, "-$patch_max";
5550                         }
5551                         push @commit_spec, '-n', "$hash_parent..$hash";
5552                 } else {
5553                         if ($params{-single}) {
5554                                 push @commit_spec, '-1';
5555                         } else {
5556                                 if ($patch_max > 0) {
5557                                         push @commit_spec, "-$patch_max";
5558                                 }
5559                                 push @commit_spec, "-n";
5560                         }
5561                         push @commit_spec, '--root', $hash;
5562                 }
5563                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5564                         '--stdout', @commit_spec
5565                         or die_error(500, "Open git-format-patch failed");
5566         } else {
5567                 die_error(400, "Unknown commitdiff format");
5568         }
5569
5570         # non-textual hash id's can be cached
5571         my $expires;
5572         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5573                 $expires = "+1d";
5574         }
5575
5576         # write commit message
5577         if ($format eq 'html') {
5578                 my $refs = git_get_references();
5579                 my $ref = format_ref_marker($refs, $co{'id'});
5580
5581                 git_header_html(undef, $expires);
5582                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5583                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5584                 git_print_authorship(\%co);
5585                 print "<div class=\"page_body\">\n";
5586                 if (@{$co{'comment'}} > 1) {
5587                         print "<div class=\"log\">\n";
5588                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5589                         print "</div>\n"; # class="log"
5590                 }
5591
5592         } elsif ($format eq 'plain') {
5593                 my $refs = git_get_references("tags");
5594                 my $tagname = git_get_rev_name_tags($hash);
5595                 my $filename = basename($project) . "-$hash.patch";
5596
5597                 print $cgi->header(
5598                         -type => 'text/plain',
5599                         -charset => 'utf-8',
5600                         -expires => $expires,
5601                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5602                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5603                 print "From: " . to_utf8($co{'author'}) . "\n";
5604                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5605                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5606
5607                 print "X-Git-Tag: $tagname\n" if $tagname;
5608                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5609
5610                 foreach my $line (@{$co{'comment'}}) {
5611                         print to_utf8($line) . "\n";
5612                 }
5613                 print "---\n\n";
5614         } elsif ($format eq 'patch') {
5615                 my $filename = basename($project) . "-$hash.patch";
5616
5617                 print $cgi->header(
5618                         -type => 'text/plain',
5619                         -charset => 'utf-8',
5620                         -expires => $expires,
5621                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5622         }
5623
5624         # write patch
5625         if ($format eq 'html') {
5626                 my $use_parents = !defined $hash_parent ||
5627                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5628                 git_difftree_body(\@difftree, $hash,
5629                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5630                 print "<br/>\n";
5631
5632                 git_patchset_body($fd, \@difftree, $hash,
5633                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5634                 close $fd;
5635                 print "</div>\n"; # class="page_body"
5636                 git_footer_html();
5637
5638         } elsif ($format eq 'plain') {
5639                 local $/ = undef;
5640                 print <$fd>;
5641                 close $fd
5642                         or print "Reading git-diff-tree failed\n";
5643         } elsif ($format eq 'patch') {
5644                 local $/ = undef;
5645                 print <$fd>;
5646                 close $fd
5647                         or print "Reading git-format-patch failed\n";
5648         }
5649 }
5650
5651 sub git_commitdiff_plain {
5652         git_commitdiff(-format => 'plain');
5653 }
5654
5655 # format-patch-style patches
5656 sub git_patch {
5657         git_commitdiff(-format => 'patch', -single=> 1);
5658 }
5659
5660 sub git_patches {
5661         git_commitdiff(-format => 'patch');
5662 }
5663
5664 sub git_history {
5665         if (!defined $hash_base) {
5666                 $hash_base = git_get_head_hash($project);
5667         }
5668         if (!defined $page) {
5669                 $page = 0;
5670         }
5671         my $ftype;
5672         my %co = parse_commit($hash_base)
5673             or die_error(404, "Unknown commit object");
5674
5675         my $refs = git_get_references();
5676         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5677
5678         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5679                                        $file_name, "--full-history")
5680             or die_error(404, "No such file or directory on given branch");
5681
5682         if (!defined $hash && defined $file_name) {
5683                 # some commits could have deleted file in question,
5684                 # and not have it in tree, but one of them has to have it
5685                 for (my $i = 0; $i <= @commitlist; $i++) {
5686                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5687                         last if defined $hash;
5688                 }
5689         }
5690         if (defined $hash) {
5691                 $ftype = git_get_type($hash);
5692         }
5693         if (!defined $ftype) {
5694                 die_error(500, "Unknown type of object");
5695         }
5696
5697         my $paging_nav = '';
5698         if ($page > 0) {
5699                 $paging_nav .=
5700                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5701                                                file_name=>$file_name)},
5702                                 "first");
5703                 $paging_nav .= " &sdot; " .
5704                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5705                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5706         } else {
5707                 $paging_nav .= "first";
5708                 $paging_nav .= " &sdot; prev";
5709         }
5710         my $next_link = '';
5711         if ($#commitlist >= 100) {
5712                 $next_link =
5713                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5714                                  -accesskey => "n", -title => "Alt-n"}, "next");
5715                 $paging_nav .= " &sdot; $next_link";
5716         } else {
5717                 $paging_nav .= " &sdot; next";
5718         }
5719
5720         git_header_html();
5721         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5722         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5723         git_print_page_path($file_name, $ftype, $hash_base);
5724
5725         git_history_body(\@commitlist, 0, 99,
5726                          $refs, $hash_base, $ftype, $next_link);
5727
5728         git_footer_html();
5729 }
5730
5731 sub git_search {
5732         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5733         if (!defined $searchtext) {
5734                 die_error(400, "Text field is empty");
5735         }
5736         if (!defined $hash) {
5737                 $hash = git_get_head_hash($project);
5738         }
5739         my %co = parse_commit($hash);
5740         if (!%co) {
5741                 die_error(404, "Unknown commit object");
5742         }
5743         if (!defined $page) {
5744                 $page = 0;
5745         }
5746
5747         $searchtype ||= 'commit';
5748         if ($searchtype eq 'pickaxe') {
5749                 # pickaxe may take all resources of your box and run for several minutes
5750                 # with every query - so decide by yourself how public you make this feature
5751                 gitweb_check_feature('pickaxe')
5752                     or die_error(403, "Pickaxe is disabled");
5753         }
5754         if ($searchtype eq 'grep') {
5755                 gitweb_check_feature('grep')[0]
5756                     or die_error(403, "Grep is disabled");
5757         }
5758
5759         git_header_html();
5760
5761         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5762                 my $greptype;
5763                 if ($searchtype eq 'commit') {
5764                         $greptype = "--grep=";
5765                 } elsif ($searchtype eq 'author') {
5766                         $greptype = "--author=";
5767                 } elsif ($searchtype eq 'committer') {
5768                         $greptype = "--committer=";
5769                 }
5770                 $greptype .= $searchtext;
5771                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5772                                                $greptype, '--regexp-ignore-case',
5773                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5774
5775                 my $paging_nav = '';
5776                 if ($page > 0) {
5777                         $paging_nav .=
5778                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5779                                                        searchtext=>$searchtext,
5780                                                        searchtype=>$searchtype)},
5781                                         "first");
5782                         $paging_nav .= " &sdot; " .
5783                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5784                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5785                 } else {
5786                         $paging_nav .= "first";
5787                         $paging_nav .= " &sdot; prev";
5788                 }
5789                 my $next_link = '';
5790                 if ($#commitlist >= 100) {
5791                         $next_link =
5792                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5793                                          -accesskey => "n", -title => "Alt-n"}, "next");
5794                         $paging_nav .= " &sdot; $next_link";
5795                 } else {
5796                         $paging_nav .= " &sdot; next";
5797                 }
5798
5799                 if ($#commitlist >= 100) {
5800                 }
5801
5802                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5803                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5804                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5805         }
5806
5807         if ($searchtype eq 'pickaxe') {
5808                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5809                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5810
5811                 print "<table class=\"pickaxe search\">\n";
5812                 my $alternate = 1;
5813                 $/ = "\n";
5814                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5815                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5816                         ($search_use_regexp ? '--pickaxe-regex' : ());
5817                 undef %co;
5818                 my @files;
5819                 while (my $line = <$fd>) {
5820                         chomp $line;
5821                         next unless $line;
5822
5823                         my %set = parse_difftree_raw_line($line);
5824                         if (defined $set{'commit'}) {
5825                                 # finish previous commit
5826                                 if (%co) {
5827                                         print "</td>\n" .
5828                                               "<td class=\"link\">" .
5829                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5830                                               " | " .
5831                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5832                                         print "</td>\n" .
5833                                               "</tr>\n";
5834                                 }
5835
5836                                 if ($alternate) {
5837                                         print "<tr class=\"dark\">\n";
5838                                 } else {
5839                                         print "<tr class=\"light\">\n";
5840                                 }
5841                                 $alternate ^= 1;
5842                                 %co = parse_commit($set{'commit'});
5843                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5844                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5845                                       "<td><i>$author</i></td>\n" .
5846                                       "<td>" .
5847                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5848                                               -class => "list subject"},
5849                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5850                         } elsif (defined $set{'to_id'}) {
5851                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5852
5853                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5854                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5855                                               -class => "list"},
5856                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5857                                       "<br/>\n";
5858                         }
5859                 }
5860                 close $fd;
5861
5862                 # finish last commit (warning: repetition!)
5863                 if (%co) {
5864                         print "</td>\n" .
5865                               "<td class=\"link\">" .
5866                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5867                               " | " .
5868                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5869                         print "</td>\n" .
5870                               "</tr>\n";
5871                 }
5872
5873                 print "</table>\n";
5874         }
5875
5876         if ($searchtype eq 'grep') {
5877                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5878                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5879
5880                 print "<table class=\"grep_search\">\n";
5881                 my $alternate = 1;
5882                 my $matches = 0;
5883                 $/ = "\n";
5884                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5885                         $search_use_regexp ? ('-E', '-i') : '-F',
5886                         $searchtext, $co{'tree'};
5887                 my $lastfile = '';
5888                 while (my $line = <$fd>) {
5889                         chomp $line;
5890                         my ($file, $lno, $ltext, $binary);
5891                         last if ($matches++ > 1000);
5892                         if ($line =~ /^Binary file (.+) matches$/) {
5893                                 $file = $1;
5894                                 $binary = 1;
5895                         } else {
5896                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5897                         }
5898                         if ($file ne $lastfile) {
5899                                 $lastfile and print "</td></tr>\n";
5900                                 if ($alternate++) {
5901                                         print "<tr class=\"dark\">\n";
5902                                 } else {
5903                                         print "<tr class=\"light\">\n";
5904                                 }
5905                                 print "<td class=\"list\">".
5906                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5907                                                                file_name=>"$file"),
5908                                                 -class => "list"}, esc_path($file));
5909                                 print "</td><td>\n";
5910                                 $lastfile = $file;
5911                         }
5912                         if ($binary) {
5913                                 print "<div class=\"binary\">Binary file</div>\n";
5914                         } else {
5915                                 $ltext = untabify($ltext);
5916                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5917                                         $ltext = esc_html($1, -nbsp=>1);
5918                                         $ltext .= '<span class="match">';
5919                                         $ltext .= esc_html($2, -nbsp=>1);
5920                                         $ltext .= '</span>';
5921                                         $ltext .= esc_html($3, -nbsp=>1);
5922                                 } else {
5923                                         $ltext = esc_html($ltext, -nbsp=>1);
5924                                 }
5925                                 print "<div class=\"pre\">" .
5926                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5927                                                                file_name=>"$file").'#l'.$lno,
5928                                                 -class => "linenr"}, sprintf('%4i', $lno))
5929                                         . ' ' .  $ltext . "</div>\n";
5930                         }
5931                 }
5932                 if ($lastfile) {
5933                         print "</td></tr>\n";
5934                         if ($matches > 1000) {
5935                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5936                         }
5937                 } else {
5938                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5939                 }
5940                 close $fd;
5941
5942                 print "</table>\n";
5943         }
5944         git_footer_html();
5945 }
5946
5947 sub git_search_help {
5948         git_header_html();
5949         git_print_page_nav('','', $hash,$hash,$hash);
5950         print <<EOT;
5951 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5952 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5953 the pattern entered is recognized as the POSIX extended
5954 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5955 insensitive).</p>
5956 <dl>
5957 <dt><b>commit</b></dt>
5958 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5959 EOT
5960         my $have_grep = gitweb_check_feature('grep');
5961         if ($have_grep) {
5962                 print <<EOT;
5963 <dt><b>grep</b></dt>
5964 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5965     a different one) are searched for the given pattern. On large trees, this search can take
5966 a while and put some strain on the server, so please use it with some consideration. Note that
5967 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5968 case-sensitive.</dd>
5969 EOT
5970         }
5971         print <<EOT;
5972 <dt><b>author</b></dt>
5973 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5974 <dt><b>committer</b></dt>
5975 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5976 EOT
5977         my $have_pickaxe = gitweb_check_feature('pickaxe');
5978         if ($have_pickaxe) {
5979                 print <<EOT;
5980 <dt><b>pickaxe</b></dt>
5981 <dd>All commits that caused the string to appear or disappear from any file (changes that
5982 added, removed or "modified" the string) will be listed. This search can take a while and
5983 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5984 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5985 EOT
5986         }
5987         print "</dl>\n";
5988         git_footer_html();
5989 }
5990
5991 sub git_shortlog {
5992         my $head = git_get_head_hash($project);
5993         if (!defined $hash) {
5994                 $hash = $head;
5995         }
5996         if (!defined $page) {
5997                 $page = 0;
5998         }
5999         my $refs = git_get_references();
6000
6001         my $commit_hash = $hash;
6002         if (defined $hash_parent) {
6003                 $commit_hash = "$hash_parent..$hash";
6004         }
6005         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
6006
6007         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
6008         my $next_link = '';
6009         if ($#commitlist >= 100) {
6010                 $next_link =
6011                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6012                                  -accesskey => "n", -title => "Alt-n"}, "next");
6013         }
6014         my $patch_max = gitweb_check_feature('patches');
6015         if ($patch_max) {
6016                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6017                         $paging_nav .= " &sdot; " .
6018                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6019                                         "patches");
6020                 }
6021         }
6022
6023         git_header_html();
6024         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
6025         git_print_header_div('summary', $project);
6026
6027         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
6028
6029         git_footer_html();
6030 }
6031
6032 ## ......................................................................
6033 ## feeds (RSS, Atom; OPML)
6034
6035 sub git_feed {
6036         my $format = shift || 'atom';
6037         my $have_blame = gitweb_check_feature('blame');
6038
6039         # Atom: http://www.atomenabled.org/developers/syndication/
6040         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6041         if ($format ne 'rss' && $format ne 'atom') {
6042                 die_error(400, "Unknown web feed format");
6043         }
6044
6045         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6046         my $head = $hash || 'HEAD';
6047         my @commitlist = parse_commits($head, 150, 0, $file_name);
6048
6049         my %latest_commit;
6050         my %latest_date;
6051         my $content_type = "application/$format+xml";
6052         if (defined $cgi->http('HTTP_ACCEPT') &&
6053                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6054                 # browser (feed reader) prefers text/xml
6055                 $content_type = 'text/xml';
6056         }
6057         if (defined($commitlist[0])) {
6058                 %latest_commit = %{$commitlist[0]};
6059                 my $latest_epoch = $latest_commit{'committer_epoch'};
6060                 %latest_date   = parse_date($latest_epoch);
6061                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6062                 if (defined $if_modified) {
6063                         my $since;
6064                         if (eval { require HTTP::Date; 1; }) {
6065                                 $since = HTTP::Date::str2time($if_modified);
6066                         } elsif (eval { require Time::ParseDate; 1; }) {
6067                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6068                         }
6069                         if (defined $since && $latest_epoch <= $since) {
6070                                 print $cgi->header(
6071                                         -type => $content_type,
6072                                         -charset => 'utf-8',
6073                                         -last_modified => $latest_date{'rfc2822'},
6074                                         -status => '304 Not Modified');
6075                                 return;
6076                         }
6077                 }
6078                 print $cgi->header(
6079                         -type => $content_type,
6080                         -charset => 'utf-8',
6081                         -last_modified => $latest_date{'rfc2822'});
6082         } else {
6083                 print $cgi->header(
6084                         -type => $content_type,
6085                         -charset => 'utf-8');
6086         }
6087
6088         # Optimization: skip generating the body if client asks only
6089         # for Last-Modified date.
6090         return if ($cgi->request_method() eq 'HEAD');
6091
6092         # header variables
6093         my $title = "$site_name - $project/$action";
6094         my $feed_type = 'log';
6095         if (defined $hash) {
6096                 $title .= " - '$hash'";
6097                 $feed_type = 'branch log';
6098                 if (defined $file_name) {
6099                         $title .= " :: $file_name";
6100                         $feed_type = 'history';
6101                 }
6102         } elsif (defined $file_name) {
6103                 $title .= " - $file_name";
6104                 $feed_type = 'history';
6105         }
6106         $title .= " $feed_type";
6107         my $descr = git_get_project_description($project);
6108         if (defined $descr) {
6109                 $descr = esc_html($descr);
6110         } else {
6111                 $descr = "$project " .
6112                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6113                          " feed";
6114         }
6115         my $owner = git_get_project_owner($project);
6116         $owner = esc_html($owner);
6117
6118         #header
6119         my $alt_url;
6120         if (defined $file_name) {
6121                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6122         } elsif (defined $hash) {
6123                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6124         } else {
6125                 $alt_url = href(-full=>1, action=>"summary");
6126         }
6127         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6128         if ($format eq 'rss') {
6129                 print <<XML;
6130 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6131 <channel>
6132 XML
6133                 print "<title>$title</title>\n" .
6134                       "<link>$alt_url</link>\n" .
6135                       "<description>$descr</description>\n" .
6136                       "<language>en</language>\n" .
6137                       # project owner is responsible for 'editorial' content
6138                       "<managingEditor>$owner</managingEditor>\n";
6139                 if (defined $logo || defined $favicon) {
6140                         # prefer the logo to the favicon, since RSS
6141                         # doesn't allow both
6142                         my $img = esc_url($logo || $favicon);
6143                         print "<image>\n" .
6144                               "<url>$img</url>\n" .
6145                               "<title>$title</title>\n" .
6146                               "<link>$alt_url</link>\n" .
6147                               "</image>\n";
6148                 }
6149                 if (%latest_date) {
6150                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6151                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6152                 }
6153                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6154         } elsif ($format eq 'atom') {
6155                 print <<XML;
6156 <feed xmlns="http://www.w3.org/2005/Atom">
6157 XML
6158                 print "<title>$title</title>\n" .
6159                       "<subtitle>$descr</subtitle>\n" .
6160                       '<link rel="alternate" type="text/html" href="' .
6161                       $alt_url . '" />' . "\n" .
6162                       '<link rel="self" type="' . $content_type . '" href="' .
6163                       $cgi->self_url() . '" />' . "\n" .
6164                       "<id>" . href(-full=>1) . "</id>\n" .
6165                       # use project owner for feed author
6166                       "<author><name>$owner</name></author>\n";
6167                 if (defined $favicon) {
6168                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6169                 }
6170                 if (defined $logo_url) {
6171                         # not twice as wide as tall: 72 x 27 pixels
6172                         print "<logo>" . esc_url($logo) . "</logo>\n";
6173                 }
6174                 if (! %latest_date) {
6175                         # dummy date to keep the feed valid until commits trickle in:
6176                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6177                 } else {
6178                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6179                 }
6180                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6181         }
6182
6183         # contents
6184         for (my $i = 0; $i <= $#commitlist; $i++) {
6185                 my %co = %{$commitlist[$i]};
6186                 my $commit = $co{'id'};
6187                 # we read 150, we always show 30 and the ones more recent than 48 hours
6188                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6189                         last;
6190                 }
6191                 my %cd = parse_date($co{'author_epoch'});
6192
6193                 # get list of changed files
6194                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6195                         $co{'parent'} || "--root",
6196                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6197                         or next;
6198                 my @difftree = map { chomp; $_ } <$fd>;
6199                 close $fd
6200                         or next;
6201
6202                 # print element (entry, item)
6203                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6204                 if ($format eq 'rss') {
6205                         print "<item>\n" .
6206                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6207                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6208                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6209                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6210                               "<link>$co_url</link>\n" .
6211                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6212                               "<content:encoded>" .
6213                               "<![CDATA[\n";
6214                 } elsif ($format eq 'atom') {
6215                         print "<entry>\n" .
6216                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6217                               "<updated>$cd{'iso-8601'}</updated>\n" .
6218                               "<author>\n" .
6219                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6220                         if ($co{'author_email'}) {
6221                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6222                         }
6223                         print "</author>\n" .
6224                               # use committer for contributor
6225                               "<contributor>\n" .
6226                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6227                         if ($co{'committer_email'}) {
6228                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6229                         }
6230                         print "</contributor>\n" .
6231                               "<published>$cd{'iso-8601'}</published>\n" .
6232                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6233                               "<id>$co_url</id>\n" .
6234                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6235                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6236                 }
6237                 my $comment = $co{'comment'};
6238                 print "<pre>\n";
6239                 foreach my $line (@$comment) {
6240                         $line = esc_html($line);
6241                         print "$line\n";
6242                 }
6243                 print "</pre><ul>\n";
6244                 foreach my $difftree_line (@difftree) {
6245                         my %difftree = parse_difftree_raw_line($difftree_line);
6246                         next if !$difftree{'from_id'};
6247
6248                         my $file = $difftree{'file'} || $difftree{'to_file'};
6249
6250                         print "<li>" .
6251                               "[" .
6252                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6253                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6254                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6255                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6256                                       -title => "diff"}, 'D');
6257                         if ($have_blame) {
6258                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6259                                                              file_name=>$file, hash_base=>$commit),
6260                                               -title => "blame"}, 'B');
6261                         }
6262                         # if this is not a feed of a file history
6263                         if (!defined $file_name || $file_name ne $file) {
6264                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6265                                                              file_name=>$file, hash=>$commit),
6266                                               -title => "history"}, 'H');
6267                         }
6268                         $file = esc_path($file);
6269                         print "] ".
6270                               "$file</li>\n";
6271                 }
6272                 if ($format eq 'rss') {
6273                         print "</ul>]]>\n" .
6274                               "</content:encoded>\n" .
6275                               "</item>\n";
6276                 } elsif ($format eq 'atom') {
6277                         print "</ul>\n</div>\n" .
6278                               "</content>\n" .
6279                               "</entry>\n";
6280                 }
6281         }
6282
6283         # end of feed
6284         if ($format eq 'rss') {
6285                 print "</channel>\n</rss>\n";
6286         }       elsif ($format eq 'atom') {
6287                 print "</feed>\n";
6288         }
6289 }
6290
6291 sub git_rss {
6292         git_feed('rss');
6293 }
6294
6295 sub git_atom {
6296         git_feed('atom');
6297 }
6298
6299 sub git_opml {
6300         my @list = git_get_projects_list();
6301
6302         print $cgi->header(
6303                 -type => 'text/xml',
6304                 -charset => 'utf-8',
6305                 -content_disposition => 'inline; filename="opml.xml"');
6306
6307         print <<XML;
6308 <?xml version="1.0" encoding="utf-8"?>
6309 <opml version="1.0">
6310 <head>
6311   <title>$site_name OPML Export</title>
6312 </head>
6313 <body>
6314 <outline text="git RSS feeds">
6315 XML
6316
6317         foreach my $pr (@list) {
6318                 my %proj = %$pr;
6319                 my $head = git_get_head_hash($proj{'path'});
6320                 if (!defined $head) {
6321                         next;
6322                 }
6323                 $git_dir = "$projectroot/$proj{'path'}";
6324                 my %co = parse_commit($head);
6325                 if (!%co) {
6326                         next;
6327                 }
6328
6329                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6330                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6331                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6332                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6333         }
6334         print <<XML;
6335 </outline>
6336 </body>
6337 </opml>
6338 XML
6339 }