gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 BEGIN {
  22         CGI->compile() if $ENV{'MOD_PERL'};
  23 }
  24
  25 our $cgi = new CGI;
  26 our $version = "++GIT_VERSION++";
  27 our $my_url = $cgi->url();
  28 our $my_uri = $cgi->url(-absolute => 1);
  29
  30 # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  31 # needed and used only for URLs with nonempty PATH_INFO
  32 our $base_url = $my_url;
  33
  34 # When the script is used as DirectoryIndex, the URL does not contain the name
  35 # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  36 # have to do it ourselves. We make $path_info global because it's also used
  37 # later on.
  38 #
  39 # Another issue with the script being the DirectoryIndex is that the resulting
  40 # $my_url data is not the full script URL: this is good, because we want
  41 # generated links to keep implying the script name if it wasn't explicitly
  42 # indicated in the URL we're handling, but it means that $my_url cannot be used
  43 # as base URL.
  44 # Therefore, if we needed to strip PATH_INFO, then we know that we have
  45 # to build the base URL ourselves:
  46 our $path_info = $ENV{"PATH_INFO"};
  47 if ($path_info) {
  48         if ($my_url =~ s,\Q$path_info\E$,, &&
  49             $my_uri =~ s,\Q$path_info\E$,, &&
  50             defined $ENV{'SCRIPT_NAME'}) {
  51                 $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  52         }
  53 }
  54
  55 # core git executable to use
  56 # this can just be "git" if your webserver has a sensible PATH
  57 our $GIT = "++GIT_BINDIR++/git";
  58
  59 # absolute fs-path which will be prepended to the project path
  60 #our $projectroot = "/pub/scm";
  61 our $projectroot = "++GITWEB_PROJECTROOT++";
  62
  63 # fs traversing limit for getting project list
  64 # the number is relative to the projectroot
  65 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  66
  67 # target of the home link on top of all pages
  68 our $home_link = $my_uri || "/";
  69
  70 # string of the home link on top of all pages
  71 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  72
  73 # name of your site or organization to appear in page titles
  74 # replace this with something more descriptive for clearer bookmarks
  75 our $site_name = "++GITWEB_SITENAME++"
  76                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  77
  78 # filename of html text to include at top of each page
  79 our $site_header = "++GITWEB_SITE_HEADER++";
  80 # html text to include at home page
  81 our $home_text = "++GITWEB_HOMETEXT++";
  82 # filename of html text to include at bottom of each page
  83 our $site_footer = "++GITWEB_SITE_FOOTER++";
  84
  85 # URI of stylesheets
  86 our @stylesheets = ("++GITWEB_CSS++");
  87 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  88 our $stylesheet = undef;
  89 # URI of GIT logo (72x27 size)
  90 our $logo = "++GITWEB_LOGO++";
  91 # URI of GIT favicon, assumed to be image/png type
  92 our $favicon = "++GITWEB_FAVICON++";
  93
  94 # URI and label (title) of GIT logo link
  95 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  96 #our $logo_label = "git documentation";
  97 our $logo_url = "http://git.or.cz/";
  98 our $logo_label = "git homepage";
  99
 100 # source of projects list
 101 our $projects_list = "++GITWEB_LIST++";
 102
 103 # the width (in characters) of the projects list "Description" column
 104 our $projects_list_description_width = 25;
 105
 106 # default order of projects list
 107 # valid values are none, project, descr, owner, and age
 108 our $default_projects_order = "project";
 109
 110 # show repository only if this file exists
 111 # (only effective if this variable evaluates to true)
 112 our $export_ok = "++GITWEB_EXPORT_OK++";
 113
 114 # show repository only if this subroutine returns true
 115 # when given the path to the project, for example:
 116 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 117 our $export_auth_hook = undef;
 118
 119 # only allow viewing of repositories also shown on the overview page
 120 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 121
 122 # list of git base URLs used for URL to where fetch project from,
 123 # i.e. full URL is "$git_base_url/$project"
 124 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 125
 126 # default blob_plain mimetype and default charset for text/plain blob
 127 our $default_blob_plain_mimetype = 'text/plain';
 128 our $default_text_plain_charset  = undef;
 129
 130 # file to use for guessing MIME types before trying /etc/mime.types
 131 # (relative to the current git repository)
 132 our $mimetypes_file = undef;
 133
 134 # assume this charset if line contains non-UTF-8 characters;
 135 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 136 # for which encoding all byte sequences are valid, for example
 137 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 138 # could be even 'utf-8' for the old behavior)
 139 our $fallback_encoding = 'latin1';
 140
 141 # rename detection options for git-diff and git-diff-tree
 142 # - default is '-M', with the cost proportional to
 143 #   (number of removed files) * (number of new files).
 144 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 145 #   (number of changed files + number of removed files) * (number of new files)
 146 # - even more costly is '-C', '--find-copies-harder' with cost
 147 #   (number of files in the original tree) * (number of new files)
 148 # - one might want to include '-B' option, e.g. '-B', '-M'
 149 our @diff_opts = ('-M'); # taken from git_commit
 150
 151 # Disables features that would allow repository owners to inject script into
 152 # the gitweb domain.
 153 our $prevent_xss = 0;
 154
 155 # information about snapshot formats that gitweb is capable of serving
 156 our %known_snapshot_formats = (
 157         # name => {
 158         #       'display' => display name,
 159         #       'type' => mime type,
 160         #       'suffix' => filename suffix,
 161         #       'format' => --format for git-archive,
 162         #       'compressor' => [compressor command and arguments]
 163         #                       (array reference, optional)}
 164         #
 165         'tgz' => {
 166                 'display' => 'tar.gz',
 167                 'type' => 'application/x-gzip',
 168                 'suffix' => '.tar.gz',
 169                 'format' => 'tar',
 170                 'compressor' => ['gzip']},
 171
 172         'tbz2' => {
 173                 'display' => 'tar.bz2',
 174                 'type' => 'application/x-bzip2',
 175                 'suffix' => '.tar.bz2',
 176                 'format' => 'tar',
 177                 'compressor' => ['bzip2']},
 178
 179         'zip' => {
 180                 'display' => 'zip',
 181                 'type' => 'application/x-zip',
 182                 'suffix' => '.zip',
 183                 'format' => 'zip'},
 184 );
 185
 186 # Aliases so we understand old gitweb.snapshot values in repository
 187 # configuration.
 188 our %known_snapshot_format_aliases = (
 189         'gzip'  => 'tgz',
 190         'bzip2' => 'tbz2',
 191
 192         # backward compatibility: legacy gitweb config support
 193         'x-gzip' => undef, 'gz' => undef,
 194         'x-bzip2' => undef, 'bz2' => undef,
 195         'x-zip' => undef, '' => undef,
 196 );
 197
 198 # You define site-wide feature defaults here; override them with
 199 # $GITWEB_CONFIG as necessary.
 200 our %feature = (
 201         # feature => {
 202         #       'sub' => feature-sub (subroutine),
 203         #       'override' => allow-override (boolean),
 204         #       'default' => [ default options...] (array reference)}
 205         #
 206         # if feature is overridable (it means that allow-override has true value),
 207         # then feature-sub will be called with default options as parameters;
 208         # return value of feature-sub indicates if to enable specified feature
 209         #
 210         # if there is no 'sub' key (no feature-sub), then feature cannot be
 211         # overriden
 212         #
 213         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 214         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 215         # is enabled
 216
 217         # Enable the 'blame' blob view, showing the last commit that modified
 218         # each line in the file. This can be very CPU-intensive.
 219
 220         # To enable system wide have in $GITWEB_CONFIG
 221         # $feature{'blame'}{'default'} = [1];
 222         # To have project specific config enable override in $GITWEB_CONFIG
 223         # $feature{'blame'}{'override'} = 1;
 224         # and in project config gitweb.blame = 0|1;
 225         'blame' => {
 226                 'sub' => sub { feature_bool('blame', @_) },
 227                 'override' => 0,
 228                 'default' => [0]},
 229
 230         # Enable the 'snapshot' link, providing a compressed archive of any
 231         # tree. This can potentially generate high traffic if you have large
 232         # project.
 233
 234         # Value is a list of formats defined in %known_snapshot_formats that
 235         # you wish to offer.
 236         # To disable system wide have in $GITWEB_CONFIG
 237         # $feature{'snapshot'}{'default'} = [];
 238         # To have project specific config enable override in $GITWEB_CONFIG
 239         # $feature{'snapshot'}{'override'} = 1;
 240         # and in project config, a comma-separated list of formats or "none"
 241         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 242         'snapshot' => {
 243                 'sub' => \&feature_snapshot,
 244                 'override' => 0,
 245                 'default' => ['tgz']},
 246
 247         # Enable text search, which will list the commits which match author,
 248         # committer or commit text to a given string.  Enabled by default.
 249         # Project specific override is not supported.
 250         'search' => {
 251                 'override' => 0,
 252                 'default' => [1]},
 253
 254         # Enable grep search, which will list the files in currently selected
 255         # tree containing the given string. Enabled by default. This can be
 256         # potentially CPU-intensive, of course.
 257
 258         # To enable system wide have in $GITWEB_CONFIG
 259         # $feature{'grep'}{'default'} = [1];
 260         # To have project specific config enable override in $GITWEB_CONFIG
 261         # $feature{'grep'}{'override'} = 1;
 262         # and in project config gitweb.grep = 0|1;
 263         'grep' => {
 264                 'sub' => sub { feature_bool('grep', @_) },
 265                 'override' => 0,
 266                 'default' => [1]},
 267
 268         # Enable the pickaxe search, which will list the commits that modified
 269         # a given string in a file. This can be practical and quite faster
 270         # alternative to 'blame', but still potentially CPU-intensive.
 271
 272         # To enable system wide have in $GITWEB_CONFIG
 273         # $feature{'pickaxe'}{'default'} = [1];
 274         # To have project specific config enable override in $GITWEB_CONFIG
 275         # $feature{'pickaxe'}{'override'} = 1;
 276         # and in project config gitweb.pickaxe = 0|1;
 277         'pickaxe' => {
 278                 'sub' => sub { feature_bool('pickaxe', @_) },
 279                 'override' => 0,
 280                 'default' => [1]},
 281
 282         # Make gitweb use an alternative format of the URLs which can be
 283         # more readable and natural-looking: project name is embedded
 284         # directly in the path and the query string contains other
 285         # auxiliary information. All gitweb installations recognize
 286         # URL in either format; this configures in which formats gitweb
 287         # generates links.
 288
 289         # To enable system wide have in $GITWEB_CONFIG
 290         # $feature{'pathinfo'}{'default'} = [1];
 291         # Project specific override is not supported.
 292
 293         # Note that you will need to change the default location of CSS,
 294         # favicon, logo and possibly other files to an absolute URL. Also,
 295         # if gitweb.cgi serves as your indexfile, you will need to force
 296         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 297         'pathinfo' => {
 298                 'override' => 0,
 299                 'default' => [0]},
 300
 301         # Make gitweb consider projects in project root subdirectories
 302         # to be forks of existing projects. Given project $projname.git,
 303         # projects matching $projname/*.git will not be shown in the main
 304         # projects list, instead a '+' mark will be added to $projname
 305         # there and a 'forks' view will be enabled for the project, listing
 306         # all the forks. If project list is taken from a file, forks have
 307         # to be listed after the main project.
 308
 309         # To enable system wide have in $GITWEB_CONFIG
 310         # $feature{'forks'}{'default'} = [1];
 311         # Project specific override is not supported.
 312         'forks' => {
 313                 'override' => 0,
 314                 'default' => [0]},
 315
 316         # Insert custom links to the action bar of all project pages.
 317         # This enables you mainly to link to third-party scripts integrating
 318         # into gitweb; e.g. git-browser for graphical history representation
 319         # or custom web-based repository administration interface.
 320
 321         # The 'default' value consists of a list of triplets in the form
 322         # (label, link, position) where position is the label after which
 323         # to insert the link and link is a format string where %n expands
 324         # to the project name, %f to the project path within the filesystem,
 325         # %h to the current hash (h gitweb parameter) and %b to the current
 326         # hash base (hb gitweb parameter); %% expands to %.
 327
 328         # To enable system wide have in $GITWEB_CONFIG e.g.
 329         # $feature{'actions'}{'default'} = [('graphiclog',
 330         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 331         # Project specific override is not supported.
 332         'actions' => {
 333                 'override' => 0,
 334                 'default' => []},
 335
 336         # Allow gitweb scan project content tags described in ctags/
 337         # of project repository, and display the popular Web 2.0-ish
 338         # "tag cloud" near the project list. Note that this is something
 339         # COMPLETELY different from the normal Git tags.
 340
 341         # gitweb by itself can show existing tags, but it does not handle
 342         # tagging itself; you need an external application for that.
 343         # For an example script, check Girocco's cgi/tagproj.cgi.
 344         # You may want to install the HTML::TagCloud Perl module to get
 345         # a pretty tag cloud instead of just a list of tags.
 346
 347         # To enable system wide have in $GITWEB_CONFIG
 348         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 349         # Project specific override is not supported.
 350         'ctags' => {
 351                 'override' => 0,
 352                 'default' => [0]},
 353
 354         # The maximum number of patches in a patchset generated in patch
 355         # view. Set this to 0 or undef to disable patch view, or to a
 356         # negative number to remove any limit.
 357
 358         # To disable system wide have in $GITWEB_CONFIG
 359         # $feature{'patches'}{'default'} = [0];
 360         # To have project specific config enable override in $GITWEB_CONFIG
 361         # $feature{'patches'}{'override'} = 1;
 362         # and in project config gitweb.patches = 0|n;
 363         # where n is the maximum number of patches allowed in a patchset.
 364         'patches' => {
 365                 'sub' => \&feature_patches,
 366                 'override' => 0,
 367                 'default' => [16]},
 368 );
 369
 370 sub gitweb_get_feature {
 371         my ($name) = @_;
 372         return unless exists $feature{$name};
 373         my ($sub, $override, @defaults) = (
 374                 $feature{$name}{'sub'},
 375                 $feature{$name}{'override'},
 376                 @{$feature{$name}{'default'}});
 377         if (!$override) { return @defaults; }
 378         if (!defined $sub) {
 379                 warn "feature $name is not overrideable";
 380                 return @defaults;
 381         }
 382         return $sub->(@defaults);
 383 }
 384
 385 # A wrapper to check if a given feature is enabled.
 386 # With this, you can say
 387 #
 388 #   my $bool_feat = gitweb_check_feature('bool_feat');
 389 #   gitweb_check_feature('bool_feat') or somecode;
 390 #
 391 # instead of
 392 #
 393 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 394 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 395 #
 396 sub gitweb_check_feature {
 397         return (gitweb_get_feature(@_))[0];
 398 }
 399
 400
 401 sub feature_bool {
 402         my $key = shift;
 403         my ($val) = git_get_project_config($key, '--bool');
 404
 405         if (!defined $val) {
 406                 return ($_[0]);
 407         } elsif ($val eq 'true') {
 408                 return (1);
 409         } elsif ($val eq 'false') {
 410                 return (0);
 411         }
 412 }
 413
 414 sub feature_snapshot {
 415         my (@fmts) = @_;
 416
 417         my ($val) = git_get_project_config('snapshot');
 418
 419         if ($val) {
 420                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 421         }
 422
 423         return @fmts;
 424 }
 425
 426 sub feature_patches {
 427         my @val = (git_get_project_config('patches', '--int'));
 428
 429         if (@val) {
 430                 return @val;
 431         }
 432
 433         return ($_[0]);
 434 }
 435
 436 # checking HEAD file with -e is fragile if the repository was
 437 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 438 # and then pruned.
 439 sub check_head_link {
 440         my ($dir) = @_;
 441         my $headfile = "$dir/HEAD";
 442         return ((-e $headfile) ||
 443                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 444 }
 445
 446 sub check_export_ok {
 447         my ($dir) = @_;
 448         return (check_head_link($dir) &&
 449                 (!$export_ok || -e "$dir/$export_ok") &&
 450                 (!$export_auth_hook || $export_auth_hook->($dir)));
 451 }
 452
 453 # process alternate names for backward compatibility
 454 # filter out unsupported (unknown) snapshot formats
 455 sub filter_snapshot_fmts {
 456         my @fmts = @_;
 457
 458         @fmts = map {
 459                 exists $known_snapshot_format_aliases{$_} ?
 460                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 461         @fmts = grep {
 462                 exists $known_snapshot_formats{$_} } @fmts;
 463 }
 464
 465 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 466 if (-e $GITWEB_CONFIG) {
 467         do $GITWEB_CONFIG;
 468 } else {
 469         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 470         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 471 }
 472
 473 # version of the core git binary
 474 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 475
 476 $projects_list ||= $projectroot;
 477
 478 # ======================================================================
 479 # input validation and dispatch
 480
 481 # input parameters can be collected from a variety of sources (presently, CGI
 482 # and PATH_INFO), so we define an %input_params hash that collects them all
 483 # together during validation: this allows subsequent uses (e.g. href()) to be
 484 # agnostic of the parameter origin
 485
 486 our %input_params = ();
 487
 488 # input parameters are stored with the long parameter name as key. This will
 489 # also be used in the href subroutine to convert parameters to their CGI
 490 # equivalent, and since the href() usage is the most frequent one, we store
 491 # the name -> CGI key mapping here, instead of the reverse.
 492 #
 493 # XXX: Warning: If you touch this, check the search form for updating,
 494 # too.
 495
 496 our @cgi_param_mapping = (
 497         project => "p",
 498         action => "a",
 499         file_name => "f",
 500         file_parent => "fp",
 501         hash => "h",
 502         hash_parent => "hp",
 503         hash_base => "hb",
 504         hash_parent_base => "hpb",
 505         page => "pg",
 506         order => "o",
 507         searchtext => "s",
 508         searchtype => "st",
 509         snapshot_format => "sf",
 510         extra_options => "opt",
 511         search_use_regexp => "sr",
 512 );
 513 our %cgi_param_mapping = @cgi_param_mapping;
 514
 515 # we will also need to know the possible actions, for validation
 516 our %actions = (
 517         "blame" => \&git_blame,
 518         "blobdiff" => \&git_blobdiff,
 519         "blobdiff_plain" => \&git_blobdiff_plain,
 520         "blob" => \&git_blob,
 521         "blob_plain" => \&git_blob_plain,
 522         "commitdiff" => \&git_commitdiff,
 523         "commitdiff_plain" => \&git_commitdiff_plain,
 524         "commit" => \&git_commit,
 525         "forks" => \&git_forks,
 526         "heads" => \&git_heads,
 527         "history" => \&git_history,
 528         "log" => \&git_log,
 529         "patch" => \&git_patch,
 530         "patches" => \&git_patches,
 531         "rss" => \&git_rss,
 532         "atom" => \&git_atom,
 533         "search" => \&git_search,
 534         "search_help" => \&git_search_help,
 535         "shortlog" => \&git_shortlog,
 536         "summary" => \&git_summary,
 537         "tag" => \&git_tag,
 538         "tags" => \&git_tags,
 539         "tree" => \&git_tree,
 540         "snapshot" => \&git_snapshot,
 541         "object" => \&git_object,
 542         # those below don't need $project
 543         "opml" => \&git_opml,
 544         "project_list" => \&git_project_list,
 545         "project_index" => \&git_project_index,
 546 );
 547
 548 # finally, we have the hash of allowed extra_options for the commands that
 549 # allow them
 550 our %allowed_options = (
 551         "--no-merges" => [ qw(rss atom log shortlog history) ],
 552 );
 553
 554 # fill %input_params with the CGI parameters. All values except for 'opt'
 555 # should be single values, but opt can be an array. We should probably
 556 # build an array of parameters that can be multi-valued, but since for the time
 557 # being it's only this one, we just single it out
 558 while (my ($name, $symbol) = each %cgi_param_mapping) {
 559         if ($symbol eq 'opt') {
 560                 $input_params{$name} = [ $cgi->param($symbol) ];
 561         } else {
 562                 $input_params{$name} = $cgi->param($symbol);
 563         }
 564 }
 565
 566 # now read PATH_INFO and update the parameter list for missing parameters
 567 sub evaluate_path_info {
 568         return if defined $input_params{'project'};
 569         return if !$path_info;
 570         $path_info =~ s,^/+,,;
 571         return if !$path_info;
 572
 573         # find which part of PATH_INFO is project
 574         my $project = $path_info;
 575         $project =~ s,/+$,,;
 576         while ($project && !check_head_link("$projectroot/$project")) {
 577                 $project =~ s,/*[^/]*$,,;
 578         }
 579         return unless $project;
 580         $input_params{'project'} = $project;
 581
 582         # do not change any parameters if an action is given using the query string
 583         return if $input_params{'action'};
 584         $path_info =~ s,^\Q$project\E/*,,;
 585
 586         # next, check if we have an action
 587         my $action = $path_info;
 588         $action =~ s,/.*$,,;
 589         if (exists $actions{$action}) {
 590                 $path_info =~ s,^$action/*,,;
 591                 $input_params{'action'} = $action;
 592         }
 593
 594         # list of actions that want hash_base instead of hash, but can have no
 595         # pathname (f) parameter
 596         my @wants_base = (
 597                 'tree',
 598                 'history',
 599         );
 600
 601         # we want to catch
 602         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 603         my ($parentrefname, $parentpathname, $refname, $pathname) =
 604                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 605
 606         # first, analyze the 'current' part
 607         if (defined $pathname) {
 608                 # we got "branch:filename" or "branch:dir/"
 609                 # we could use git_get_type(branch:pathname), but:
 610                 # - it needs $git_dir
 611                 # - it does a git() call
 612                 # - the convention of terminating directories with a slash
 613                 #   makes it superfluous
 614                 # - embedding the action in the PATH_INFO would make it even
 615                 #   more superfluous
 616                 $pathname =~ s,^/+,,;
 617                 if (!$pathname || substr($pathname, -1) eq "/") {
 618                         $input_params{'action'} ||= "tree";
 619                         $pathname =~ s,/$,,;
 620                 } else {
 621                         # the default action depends on whether we had parent info
 622                         # or not
 623                         if ($parentrefname) {
 624                                 $input_params{'action'} ||= "blobdiff_plain";
 625                         } else {
 626                                 $input_params{'action'} ||= "blob_plain";
 627                         }
 628                 }
 629                 $input_params{'hash_base'} ||= $refname;
 630                 $input_params{'file_name'} ||= $pathname;
 631         } elsif (defined $refname) {
 632                 # we got "branch". In this case we have to choose if we have to
 633                 # set hash or hash_base.
 634                 #
 635                 # Most of the actions without a pathname only want hash to be
 636                 # set, except for the ones specified in @wants_base that want
 637                 # hash_base instead. It should also be noted that hand-crafted
 638                 # links having 'history' as an action and no pathname or hash
 639                 # set will fail, but that happens regardless of PATH_INFO.
 640                 $input_params{'action'} ||= "shortlog";
 641                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 642                         $input_params{'hash_base'} ||= $refname;
 643                 } else {
 644                         $input_params{'hash'} ||= $refname;
 645                 }
 646         }
 647
 648         # next, handle the 'parent' part, if present
 649         if (defined $parentrefname) {
 650                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 651                 # someproject/blobdiff/oldrev..newrev:/filename
 652                 if ($parentpathname) {
 653                         $parentpathname =~ s,^/+,,;
 654                         $parentpathname =~ s,/$,,;
 655                         $input_params{'file_parent'} ||= $parentpathname;
 656                 } else {
 657                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 658                 }
 659                 # we assume that hash_parent_base is wanted if a path was specified,
 660                 # or if the action wants hash_base instead of hash
 661                 if (defined $input_params{'file_parent'} ||
 662                         grep { $_ eq $input_params{'action'} } @wants_base) {
 663                         $input_params{'hash_parent_base'} ||= $parentrefname;
 664                 } else {
 665                         $input_params{'hash_parent'} ||= $parentrefname;
 666                 }
 667         }
 668
 669         # for the snapshot action, we allow URLs in the form
 670         # $project/snapshot/$hash.ext
 671         # where .ext determines the snapshot and gets removed from the
 672         # passed $refname to provide the $hash.
 673         #
 674         # To be able to tell that $refname includes the format extension, we
 675         # require the following two conditions to be satisfied:
 676         # - the hash input parameter MUST have been set from the $refname part
 677         #   of the URL (i.e. they must be equal)
 678         # - the snapshot format MUST NOT have been defined already (e.g. from
 679         #   CGI parameter sf)
 680         # It's also useless to try any matching unless $refname has a dot,
 681         # so we check for that too
 682         if (defined $input_params{'action'} &&
 683                 $input_params{'action'} eq 'snapshot' &&
 684                 defined $refname && index($refname, '.') != -1 &&
 685                 $refname eq $input_params{'hash'} &&
 686                 !defined $input_params{'snapshot_format'}) {
 687                 # We loop over the known snapshot formats, checking for
 688                 # extensions. Allowed extensions are both the defined suffix
 689                 # (which includes the initial dot already) and the snapshot
 690                 # format key itself, with a prepended dot
 691                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 692                         my $hash = $refname;
 693                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 694                                 next;
 695                         }
 696                         my $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                 $long =~ s/[[:cntrl:]]/?/g;
1463                 return $cgi->a({-href => $href, -class => "list subject",
1464                                 -title => to_utf8($long)},
1465                        esc_html($short) . $extra);
1466         } else {
1467                 return $cgi->a({-href => $href, -class => "list subject"},
1468                        esc_html($long)  . $extra);
1469         }
1470 }
1471
1472 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1473 sub format_git_diff_header_line {
1474         my $line = shift;
1475         my $diffinfo = shift;
1476         my ($from, $to) = @_;
1477
1478         if ($diffinfo->{'nparents'}) {
1479                 # combined diff
1480                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1481                 if ($to->{'href'}) {
1482                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1483                                          esc_path($to->{'file'}));
1484                 } else { # file was deleted (no href)
1485                         $line .= esc_path($to->{'file'});
1486                 }
1487         } else {
1488                 # "ordinary" diff
1489                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1490                 if ($from->{'href'}) {
1491                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1492                                          'a/' . esc_path($from->{'file'}));
1493                 } else { # file was added (no href)
1494                         $line .= 'a/' . esc_path($from->{'file'});
1495                 }
1496                 $line .= ' ';
1497                 if ($to->{'href'}) {
1498                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1499                                          'b/' . esc_path($to->{'file'}));
1500                 } else { # file was deleted
1501                         $line .= 'b/' . esc_path($to->{'file'});
1502                 }
1503         }
1504
1505         return "<div class=\"diff header\">$line</div>\n";
1506 }
1507
1508 # format extended diff header line, before patch itself
1509 sub format_extended_diff_header_line {
1510         my $line = shift;
1511         my $diffinfo = shift;
1512         my ($from, $to) = @_;
1513
1514         # match <path>
1515         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1516                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1517                                        esc_path($from->{'file'}));
1518         }
1519         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1520                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1521                                  esc_path($to->{'file'}));
1522         }
1523         # match single <mode>
1524         if ($line =~ m/\s(\d{6})$/) {
1525                 $line .= '<span class="info"> (' .
1526                          file_type_long($1) .
1527                          ')</span>';
1528         }
1529         # match <hash>
1530         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1531                 # can match only for combined diff
1532                 $line = 'index ';
1533                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1534                         if ($from->{'href'}[$i]) {
1535                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1536                                                   -class=>"hash"},
1537                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1538                         } else {
1539                                 $line .= '0' x 7;
1540                         }
1541                         # separator
1542                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1543                 }
1544                 $line .= '..';
1545                 if ($to->{'href'}) {
1546                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1547                                          substr($diffinfo->{'to_id'},0,7));
1548                 } else {
1549                         $line .= '0' x 7;
1550                 }
1551
1552         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1553                 # can match only for ordinary diff
1554                 my ($from_link, $to_link);
1555                 if ($from->{'href'}) {
1556                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1557                                              substr($diffinfo->{'from_id'},0,7));
1558                 } else {
1559                         $from_link = '0' x 7;
1560                 }
1561                 if ($to->{'href'}) {
1562                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1563                                            substr($diffinfo->{'to_id'},0,7));
1564                 } else {
1565                         $to_link = '0' x 7;
1566                 }
1567                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1568                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1569         }
1570
1571         return $line . "<br/>\n";
1572 }
1573
1574 # format from-file/to-file diff header
1575 sub format_diff_from_to_header {
1576         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1577         my $line;
1578         my $result = '';
1579
1580         $line = $from_line;
1581         #assert($line =~ m/^---/) if DEBUG;
1582         # no extra formatting for "^--- /dev/null"
1583         if (! $diffinfo->{'nparents'}) {
1584                 # ordinary (single parent) diff
1585                 if ($line =~ m!^--- "?a/!) {
1586                         if ($from->{'href'}) {
1587                                 $line = '--- a/' .
1588                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1589                                                 esc_path($from->{'file'}));
1590                         } else {
1591                                 $line = '--- a/' .
1592                                         esc_path($from->{'file'});
1593                         }
1594                 }
1595                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1596
1597         } else {
1598                 # combined diff (merge commit)
1599                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1600                         if ($from->{'href'}[$i]) {
1601                                 $line = '--- ' .
1602                                         $cgi->a({-href=>href(action=>"blobdiff",
1603                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1604                                                              hash_parent_base=>$parents[$i],
1605                                                              file_parent=>$from->{'file'}[$i],
1606                                                              hash=>$diffinfo->{'to_id'},
1607                                                              hash_base=>$hash,
1608                                                              file_name=>$to->{'file'}),
1609                                                  -class=>"path",
1610                                                  -title=>"diff" . ($i+1)},
1611                                                 $i+1) .
1612                                         '/' .
1613                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1614                                                 esc_path($from->{'file'}[$i]));
1615                         } else {
1616                                 $line = '--- /dev/null';
1617                         }
1618                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1619                 }
1620         }
1621
1622         $line = $to_line;
1623         #assert($line =~ m/^\+\+\+/) if DEBUG;
1624         # no extra formatting for "^+++ /dev/null"
1625         if ($line =~ m!^\+\+\+ "?b/!) {
1626                 if ($to->{'href'}) {
1627                         $line = '+++ b/' .
1628                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1629                                         esc_path($to->{'file'}));
1630                 } else {
1631                         $line = '+++ b/' .
1632                                 esc_path($to->{'file'});
1633                 }
1634         }
1635         $result .= qq!<div class="diff to_file">$line</div>\n!;
1636
1637         return $result;
1638 }
1639
1640 # create note for patch simplified by combined diff
1641 sub format_diff_cc_simplified {
1642         my ($diffinfo, @parents) = @_;
1643         my $result = '';
1644
1645         $result .= "<div class=\"diff header\">" .
1646                    "diff --cc ";
1647         if (!is_deleted($diffinfo)) {
1648                 $result .= $cgi->a({-href => href(action=>"blob",
1649                                                   hash_base=>$hash,
1650                                                   hash=>$diffinfo->{'to_id'},
1651                                                   file_name=>$diffinfo->{'to_file'}),
1652                                     -class => "path"},
1653                                    esc_path($diffinfo->{'to_file'}));
1654         } else {
1655                 $result .= esc_path($diffinfo->{'to_file'});
1656         }
1657         $result .= "</div>\n" . # class="diff header"
1658                    "<div class=\"diff nodifferences\">" .
1659                    "Simple merge" .
1660                    "</div>\n"; # class="diff nodifferences"
1661
1662         return $result;
1663 }
1664
1665 # format patch (diff) line (not to be used for diff headers)
1666 sub format_diff_line {
1667         my $line = shift;
1668         my ($from, $to) = @_;
1669         my $diff_class = "";
1670
1671         chomp $line;
1672
1673         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1674                 # combined diff
1675                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1676                 if ($line =~ m/^\@{3}/) {
1677                         $diff_class = " chunk_header";
1678                 } elsif ($line =~ m/^\\/) {
1679                         $diff_class = " incomplete";
1680                 } elsif ($prefix =~ tr/+/+/) {
1681                         $diff_class = " add";
1682                 } elsif ($prefix =~ tr/-/-/) {
1683                         $diff_class = " rem";
1684                 }
1685         } else {
1686                 # assume ordinary diff
1687                 my $char = substr($line, 0, 1);
1688                 if ($char eq '+') {
1689                         $diff_class = " add";
1690                 } elsif ($char eq '-') {
1691                         $diff_class = " rem";
1692                 } elsif ($char eq '@') {
1693                         $diff_class = " chunk_header";
1694                 } elsif ($char eq "\\") {
1695                         $diff_class = " incomplete";
1696                 }
1697         }
1698         $line = untabify($line);
1699         if ($from && $to && $line =~ m/^\@{2} /) {
1700                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1701                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1702
1703                 $from_lines = 0 unless defined $from_lines;
1704                 $to_lines   = 0 unless defined $to_lines;
1705
1706                 if ($from->{'href'}) {
1707                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1708                                              -class=>"list"}, $from_text);
1709                 }
1710                 if ($to->{'href'}) {
1711                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1712                                              -class=>"list"}, $to_text);
1713                 }
1714                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1715                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1716                 return "<div class=\"diff$diff_class\">$line</div>\n";
1717         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1718                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1719                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1720
1721                 @from_text = split(' ', $ranges);
1722                 for (my $i = 0; $i < @from_text; ++$i) {
1723                         ($from_start[$i], $from_nlines[$i]) =
1724                                 (split(',', substr($from_text[$i], 1)), 0);
1725                 }
1726
1727                 $to_text   = pop @from_text;
1728                 $to_start  = pop @from_start;
1729                 $to_nlines = pop @from_nlines;
1730
1731                 $line = "<span class=\"chunk_info\">$prefix ";
1732                 for (my $i = 0; $i < @from_text; ++$i) {
1733                         if ($from->{'href'}[$i]) {
1734                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1735                                                   -class=>"list"}, $from_text[$i]);
1736                         } else {
1737                                 $line .= $from_text[$i];
1738                         }
1739                         $line .= " ";
1740                 }
1741                 if ($to->{'href'}) {
1742                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1743                                           -class=>"list"}, $to_text);
1744                 } else {
1745                         $line .= $to_text;
1746                 }
1747                 $line .= " $prefix</span>" .
1748                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1749                 return "<div class=\"diff$diff_class\">$line</div>\n";
1750         }
1751         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1752 }
1753
1754 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1755 # linked.  Pass the hash of the tree/commit to snapshot.
1756 sub format_snapshot_links {
1757         my ($hash) = @_;
1758         my $num_fmts = @snapshot_fmts;
1759         if ($num_fmts > 1) {
1760                 # A parenthesized list of links bearing format names.
1761                 # e.g. "snapshot (_tar.gz_ _zip_)"
1762                 return "snapshot (" . join(' ', map
1763                         $cgi->a({
1764                                 -href => href(
1765                                         action=>"snapshot",
1766                                         hash=>$hash,
1767                                         snapshot_format=>$_
1768                                 )
1769                         }, $known_snapshot_formats{$_}{'display'})
1770                 , @snapshot_fmts) . ")";
1771         } elsif ($num_fmts == 1) {
1772                 # A single "snapshot" link whose tooltip bears the format name.
1773                 # i.e. "_snapshot_"
1774                 my ($fmt) = @snapshot_fmts;
1775                 return
1776                         $cgi->a({
1777                                 -href => href(
1778                                         action=>"snapshot",
1779                                         hash=>$hash,
1780                                         snapshot_format=>$fmt
1781                                 ),
1782                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1783                         }, "snapshot");
1784         } else { # $num_fmts == 0
1785                 return undef;
1786         }
1787 }
1788
1789 ## ......................................................................
1790 ## functions returning values to be passed, perhaps after some
1791 ## transformation, to other functions; e.g. returning arguments to href()
1792
1793 # returns hash to be passed to href to generate gitweb URL
1794 # in -title key it returns description of link
1795 sub get_feed_info {
1796         my $format = shift || 'Atom';
1797         my %res = (action => lc($format));
1798
1799         # feed links are possible only for project views
1800         return unless (defined $project);
1801         # some views should link to OPML, or to generic project feed,
1802         # or don't have specific feed yet (so they should use generic)
1803         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1804
1805         my $branch;
1806         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1807         # from tag links; this also makes possible to detect branch links
1808         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1809             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1810                 $branch = $1;
1811         }
1812         # find log type for feed description (title)
1813         my $type = 'log';
1814         if (defined $file_name) {
1815                 $type  = "history of $file_name";
1816                 $type .= "/" if ($action eq 'tree');
1817                 $type .= " on '$branch'" if (defined $branch);
1818         } else {
1819                 $type = "log of $branch" if (defined $branch);
1820         }
1821
1822         $res{-title} = $type;
1823         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1824         $res{'file_name'} = $file_name;
1825
1826         return %res;
1827 }
1828
1829 ## ----------------------------------------------------------------------
1830 ## git utility subroutines, invoking git commands
1831
1832 # returns path to the core git executable and the --git-dir parameter as list
1833 sub git_cmd {
1834         return $GIT, '--git-dir='.$git_dir;
1835 }
1836
1837 # quote the given arguments for passing them to the shell
1838 # quote_command("command", "arg 1", "arg with ' and ! characters")
1839 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1840 # Try to avoid using this function wherever possible.
1841 sub quote_command {
1842         return join(' ',
1843                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
1844 }
1845
1846 # get HEAD ref of given project as hash
1847 sub git_get_head_hash {
1848         my $project = shift;
1849         my $o_git_dir = $git_dir;
1850         my $retval = undef;
1851         $git_dir = "$projectroot/$project";
1852         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1853                 my $head = <$fd>;
1854                 close $fd;
1855                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1856                         $retval = $1;
1857                 }
1858         }
1859         if (defined $o_git_dir) {
1860                 $git_dir = $o_git_dir;
1861         }
1862         return $retval;
1863 }
1864
1865 # get type of given object
1866 sub git_get_type {
1867         my $hash = shift;
1868
1869         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1870         my $type = <$fd>;
1871         close $fd or return;
1872         chomp $type;
1873         return $type;
1874 }
1875
1876 # repository configuration
1877 our $config_file = '';
1878 our %config;
1879
1880 # store multiple values for single key as anonymous array reference
1881 # single values stored directly in the hash, not as [ <value> ]
1882 sub hash_set_multi {
1883         my ($hash, $key, $value) = @_;
1884
1885         if (!exists $hash->{$key}) {
1886                 $hash->{$key} = $value;
1887         } elsif (!ref $hash->{$key}) {
1888                 $hash->{$key} = [ $hash->{$key}, $value ];
1889         } else {
1890                 push @{$hash->{$key}}, $value;
1891         }
1892 }
1893
1894 # return hash of git project configuration
1895 # optionally limited to some section, e.g. 'gitweb'
1896 sub git_parse_project_config {
1897         my $section_regexp = shift;
1898         my %config;
1899
1900         local $/ = "\0";
1901
1902         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1903                 or return;
1904
1905         while (my $keyval = <$fh>) {
1906                 chomp $keyval;
1907                 my ($key, $value) = split(/\n/, $keyval, 2);
1908
1909                 hash_set_multi(\%config, $key, $value)
1910                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1911         }
1912         close $fh;
1913
1914         return %config;
1915 }
1916
1917 # convert config value to boolean: 'true' or 'false'
1918 # no value, number > 0, 'true' and 'yes' values are true
1919 # rest of values are treated as false (never as error)
1920 sub config_to_bool {
1921         my $val = shift;
1922
1923         return 1 if !defined $val;             # section.key
1924
1925         # strip leading and trailing whitespace
1926         $val =~ s/^\s+//;
1927         $val =~ s/\s+$//;
1928
1929         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
1930                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1931 }
1932
1933 # convert config value to simple decimal number
1934 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1935 # to be multiplied by 1024, 1048576, or 1073741824
1936 sub config_to_int {
1937         my $val = shift;
1938
1939         # strip leading and trailing whitespace
1940         $val =~ s/^\s+//;
1941         $val =~ s/\s+$//;
1942
1943         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1944                 $unit = lc($unit);
1945                 # unknown unit is treated as 1
1946                 return $num * ($unit eq 'g' ? 1073741824 :
1947                                $unit eq 'm' ?    1048576 :
1948                                $unit eq 'k' ?       1024 : 1);
1949         }
1950         return $val;
1951 }
1952
1953 # convert config value to array reference, if needed
1954 sub config_to_multi {
1955         my $val = shift;
1956
1957         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1958 }
1959
1960 sub git_get_project_config {
1961         my ($key, $type) = @_;
1962
1963         # key sanity check
1964         return unless ($key);
1965         $key =~ s/^gitweb\.//;
1966         return if ($key =~ m/\W/);
1967
1968         # type sanity check
1969         if (defined $type) {
1970                 $type =~ s/^--//;
1971                 $type = undef
1972                         unless ($type eq 'bool' || $type eq 'int');
1973         }
1974
1975         # get config
1976         if (!defined $config_file ||
1977             $config_file ne "$git_dir/config") {
1978                 %config = git_parse_project_config('gitweb');
1979                 $config_file = "$git_dir/config";
1980         }
1981
1982         # check if config variable (key) exists
1983         return unless exists $config{"gitweb.$key"};
1984
1985         # ensure given type
1986         if (!defined $type) {
1987                 return $config{"gitweb.$key"};
1988         } elsif ($type eq 'bool') {
1989                 # backward compatibility: 'git config --bool' returns true/false
1990                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1991         } elsif ($type eq 'int') {
1992                 return config_to_int($config{"gitweb.$key"});
1993         }
1994         return $config{"gitweb.$key"};
1995 }
1996
1997 # get hash of given path at given ref
1998 sub git_get_hash_by_path {
1999         my $base = shift;
2000         my $path = shift || return undef;
2001         my $type = shift;
2002
2003         $path =~ s,/+$,,;
2004
2005         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2006                 or die_error(500, "Open git-ls-tree failed");
2007         my $line = <$fd>;
2008         close $fd or return undef;
2009
2010         if (!defined $line) {
2011                 # there is no tree or hash given by $path at $base
2012                 return undef;
2013         }
2014
2015         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2016         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2017         if (defined $type && $type ne $2) {
2018                 # type doesn't match
2019                 return undef;
2020         }
2021         return $3;
2022 }
2023
2024 # get path of entry with given hash at given tree-ish (ref)
2025 # used to get 'from' filename for combined diff (merge commit) for renames
2026 sub git_get_path_by_hash {
2027         my $base = shift || return;
2028         my $hash = shift || return;
2029
2030         local $/ = "\0";
2031
2032         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2033                 or return undef;
2034         while (my $line = <$fd>) {
2035                 chomp $line;
2036
2037                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2038                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2039                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2040                         close $fd;
2041                         return $1;
2042                 }
2043         }
2044         close $fd;
2045         return undef;
2046 }
2047
2048 ## ......................................................................
2049 ## git utility functions, directly accessing git repository
2050
2051 sub git_get_project_description {
2052         my $path = shift;
2053
2054         $git_dir = "$projectroot/$path";
2055         open my $fd, '<', "$git_dir/description"
2056                 or return git_get_project_config('description');
2057         my $descr = <$fd>;
2058         close $fd;
2059         if (defined $descr) {
2060                 chomp $descr;
2061         }
2062         return $descr;
2063 }
2064
2065 sub git_get_project_ctags {
2066         my $path = shift;
2067         my $ctags = {};
2068
2069         $git_dir = "$projectroot/$path";
2070         opendir my $dh, "$git_dir/ctags"
2071                 or return $ctags;
2072         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2073                 open my $ct, '<', $_ or next;
2074                 my $val = <$ct>;
2075                 chomp $val;
2076                 close $ct;
2077                 my $ctag = $_; $ctag =~ s#.*/##;
2078                 $ctags->{$ctag} = $val;
2079         }
2080         closedir $dh;
2081         $ctags;
2082 }
2083
2084 sub git_populate_project_tagcloud {
2085         my $ctags = shift;
2086
2087         # First, merge different-cased tags; tags vote on casing
2088         my %ctags_lc;
2089         foreach (keys %$ctags) {
2090                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2091                 if (not $ctags_lc{lc $_}->{topcount}
2092                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2093                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2094                         $ctags_lc{lc $_}->{topname} = $_;
2095                 }
2096         }
2097
2098         my $cloud;
2099         if (eval { require HTML::TagCloud; 1; }) {
2100                 $cloud = HTML::TagCloud->new;
2101                 foreach (sort keys %ctags_lc) {
2102                         # Pad the title with spaces so that the cloud looks
2103                         # less crammed.
2104                         my $title = $ctags_lc{$_}->{topname};
2105                         $title =~ s/ /&nbsp;/g;
2106                         $title =~ s/^/&nbsp;/g;
2107                         $title =~ s/$/&nbsp;/g;
2108                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2109                 }
2110         } else {
2111                 $cloud = \%ctags_lc;
2112         }
2113         $cloud;
2114 }
2115
2116 sub git_show_project_tagcloud {
2117         my ($cloud, $count) = @_;
2118         print STDERR ref($cloud)."..\n";
2119         if (ref $cloud eq 'HTML::TagCloud') {
2120                 return $cloud->html_and_css($count);
2121         } else {
2122                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2123                 return '<p align="center">' . join (', ', map {
2124                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2125                 } splice(@tags, 0, $count)) . '</p>';
2126         }
2127 }
2128
2129 sub git_get_project_url_list {
2130         my $path = shift;
2131
2132         $git_dir = "$projectroot/$path";
2133         open my $fd, '<', "$git_dir/cloneurl"
2134                 or return wantarray ?
2135                 @{ config_to_multi(git_get_project_config('url')) } :
2136                    config_to_multi(git_get_project_config('url'));
2137         my @git_project_url_list = map { chomp; $_ } <$fd>;
2138         close $fd;
2139
2140         return wantarray ? @git_project_url_list : \@git_project_url_list;
2141 }
2142
2143 sub git_get_projects_list {
2144         my ($filter) = @_;
2145         my @list;
2146
2147         $filter ||= '';
2148         $filter =~ s/\.git$//;
2149
2150         my $check_forks = gitweb_check_feature('forks');
2151
2152         if (-d $projects_list) {
2153                 # search in directory
2154                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2155                 # remove the trailing "/"
2156                 $dir =~ s!/+$!!;
2157                 my $pfxlen = length("$dir");
2158                 my $pfxdepth = ($dir =~ tr!/!!);
2159
2160                 File::Find::find({
2161                         follow_fast => 1, # follow symbolic links
2162                         follow_skip => 2, # ignore duplicates
2163                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2164                         wanted => sub {
2165                                 # skip project-list toplevel, if we get it.
2166                                 return if (m!^[/.]$!);
2167                                 # only directories can be git repositories
2168                                 return unless (-d $_);
2169                                 # don't traverse too deep (Find is super slow on os x)
2170                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2171                                         $File::Find::prune = 1;
2172                                         return;
2173                                 }
2174
2175                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2176                                 # we check related file in $projectroot
2177                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2178                                 if (check_export_ok("$projectroot/$path")) {
2179                                         push @list, { path => $path };
2180                                         $File::Find::prune = 1;
2181                                 }
2182                         },
2183                 }, "$dir");
2184
2185         } elsif (-f $projects_list) {
2186                 # read from file(url-encoded):
2187                 # 'git%2Fgit.git Linus+Torvalds'
2188                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2189                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2190                 my %paths;
2191                 open my $fd, '<', $projects_list or return;
2192         PROJECT:
2193                 while (my $line = <$fd>) {
2194                         chomp $line;
2195                         my ($path, $owner) = split ' ', $line;
2196                         $path = unescape($path);
2197                         $owner = unescape($owner);
2198                         if (!defined $path) {
2199                                 next;
2200                         }
2201                         if ($filter ne '') {
2202                                 # looking for forks;
2203                                 my $pfx = substr($path, 0, length($filter));
2204                                 if ($pfx ne $filter) {
2205                                         next PROJECT;
2206                                 }
2207                                 my $sfx = substr($path, length($filter));
2208                                 if ($sfx !~ /^\/.*\.git$/) {
2209                                         next PROJECT;
2210                                 }
2211                         } elsif ($check_forks) {
2212                         PATH:
2213                                 foreach my $filter (keys %paths) {
2214                                         # looking for forks;
2215                                         my $pfx = substr($path, 0, length($filter));
2216                                         if ($pfx ne $filter) {
2217                                                 next PATH;
2218                                         }
2219                                         my $sfx = substr($path, length($filter));
2220                                         if ($sfx !~ /^\/.*\.git$/) {
2221                                                 next PATH;
2222                                         }
2223                                         # is a fork, don't include it in
2224                                         # the list
2225                                         next PROJECT;
2226                                 }
2227                         }
2228                         if (check_export_ok("$projectroot/$path")) {
2229                                 my $pr = {
2230                                         path => $path,
2231                                         owner => to_utf8($owner),
2232                                 };
2233                                 push @list, $pr;
2234                                 (my $forks_path = $path) =~ s/\.git$//;
2235                                 $paths{$forks_path}++;
2236                         }
2237                 }
2238                 close $fd;
2239         }
2240         return @list;
2241 }
2242
2243 our $gitweb_project_owner = undef;
2244 sub git_get_project_list_from_file {
2245
2246         return if (defined $gitweb_project_owner);
2247
2248         $gitweb_project_owner = {};
2249         # read from file (url-encoded):
2250         # 'git%2Fgit.git Linus+Torvalds'
2251         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2252         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2253         if (-f $projects_list) {
2254                 open(my $fd, '<', $projects_list);
2255                 while (my $line = <$fd>) {
2256                         chomp $line;
2257                         my ($pr, $ow) = split ' ', $line;
2258                         $pr = unescape($pr);
2259                         $ow = unescape($ow);
2260                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2261                 }
2262                 close $fd;
2263         }
2264 }
2265
2266 sub git_get_project_owner {
2267         my $project = shift;
2268         my $owner;
2269
2270         return undef unless $project;
2271         $git_dir = "$projectroot/$project";
2272
2273         if (!defined $gitweb_project_owner) {
2274                 git_get_project_list_from_file();
2275         }
2276
2277         if (exists $gitweb_project_owner->{$project}) {
2278                 $owner = $gitweb_project_owner->{$project};
2279         }
2280         if (!defined $owner){
2281                 $owner = git_get_project_config('owner');
2282         }
2283         if (!defined $owner) {
2284                 $owner = get_file_owner("$git_dir");
2285         }
2286
2287         return $owner;
2288 }
2289
2290 sub git_get_last_activity {
2291         my ($path) = @_;
2292         my $fd;
2293
2294         $git_dir = "$projectroot/$path";
2295         open($fd, "-|", git_cmd(), 'for-each-ref',
2296              '--format=%(committer)',
2297              '--sort=-committerdate',
2298              '--count=1',
2299              'refs/heads') or return;
2300         my $most_recent = <$fd>;
2301         close $fd or return;
2302         if (defined $most_recent &&
2303             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2304                 my $timestamp = $1;
2305                 my $age = time - $timestamp;
2306                 return ($age, age_string($age));
2307         }
2308         return (undef, undef);
2309 }
2310
2311 sub git_get_references {
2312         my $type = shift || "";
2313         my %refs;
2314         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2315         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2316         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2317                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2318                 or return;
2319
2320         while (my $line = <$fd>) {
2321                 chomp $line;
2322                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2323                         if (defined $refs{$1}) {
2324                                 push @{$refs{$1}}, $2;
2325                         } else {
2326                                 $refs{$1} = [ $2 ];
2327                         }
2328                 }
2329         }
2330         close $fd or return;
2331         return \%refs;
2332 }
2333
2334 sub git_get_rev_name_tags {
2335         my $hash = shift || return undef;
2336
2337         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2338                 or return;
2339         my $name_rev = <$fd>;
2340         close $fd;
2341
2342         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2343                 return $1;
2344         } else {
2345                 # catches also '$hash undefined' output
2346                 return undef;
2347         }
2348 }
2349
2350 ## ----------------------------------------------------------------------
2351 ## parse to hash functions
2352
2353 sub parse_date {
2354         my $epoch = shift;
2355         my $tz = shift || "-0000";
2356
2357         my %date;
2358         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2359         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2360         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2361         $date{'hour'} = $hour;
2362         $date{'minute'} = $min;
2363         $date{'mday'} = $mday;
2364         $date{'day'} = $days[$wday];
2365         $date{'month'} = $months[$mon];
2366         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2367                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2368         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2369                              $mday, $months[$mon], $hour ,$min;
2370         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2371                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2372
2373         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2374         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2375         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2376         $date{'hour_local'} = $hour;
2377         $date{'minute_local'} = $min;
2378         $date{'tz_local'} = $tz;
2379         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2380                                   1900+$year, $mon+1, $mday,
2381                                   $hour, $min, $sec, $tz);
2382         return %date;
2383 }
2384
2385 sub parse_tag {
2386         my $tag_id = shift;
2387         my %tag;
2388         my @comment;
2389
2390         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2391         $tag{'id'} = $tag_id;
2392         while (my $line = <$fd>) {
2393                 chomp $line;
2394                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2395                         $tag{'object'} = $1;
2396                 } elsif ($line =~ m/^type (.+)$/) {
2397                         $tag{'type'} = $1;
2398                 } elsif ($line =~ m/^tag (.+)$/) {
2399                         $tag{'name'} = $1;
2400                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2401                         $tag{'author'} = $1;
2402                         $tag{'epoch'} = $2;
2403                         $tag{'tz'} = $3;
2404                 } elsif ($line =~ m/--BEGIN/) {
2405                         push @comment, $line;
2406                         last;
2407                 } elsif ($line eq "") {
2408                         last;
2409                 }
2410         }
2411         push @comment, <$fd>;
2412         $tag{'comment'} = \@comment;
2413         close $fd or return;
2414         if (!defined $tag{'name'}) {
2415                 return
2416         };
2417         return %tag
2418 }
2419
2420 sub parse_commit_text {
2421         my ($commit_text, $withparents) = @_;
2422         my @commit_lines = split '\n', $commit_text;
2423         my %co;
2424
2425         pop @commit_lines; # Remove '\0'
2426
2427         if (! @commit_lines) {
2428                 return;
2429         }
2430
2431         my $header = shift @commit_lines;
2432         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2433                 return;
2434         }
2435         ($co{'id'}, my @parents) = split ' ', $header;
2436         while (my $line = shift @commit_lines) {
2437                 last if $line eq "\n";
2438                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2439                         $co{'tree'} = $1;
2440                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2441                         push @parents, $1;
2442                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2443                         $co{'author'} = $1;
2444                         $co{'author_epoch'} = $2;
2445                         $co{'author_tz'} = $3;
2446                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2447                                 $co{'author_name'}  = $1;
2448                                 $co{'author_email'} = $2;
2449                         } else {
2450                                 $co{'author_name'} = $co{'author'};
2451                         }
2452                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2453                         $co{'committer'} = $1;
2454                         $co{'committer_epoch'} = $2;
2455                         $co{'committer_tz'} = $3;
2456                         $co{'committer_name'} = $co{'committer'};
2457                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2458                                 $co{'committer_name'}  = $1;
2459                                 $co{'committer_email'} = $2;
2460                         } else {
2461                                 $co{'committer_name'} = $co{'committer'};
2462                         }
2463                 }
2464         }
2465         if (!defined $co{'tree'}) {
2466                 return;
2467         };
2468         $co{'parents'} = \@parents;
2469         $co{'parent'} = $parents[0];
2470
2471         foreach my $title (@commit_lines) {
2472                 $title =~ s/^    //;
2473                 if ($title ne "") {
2474                         $co{'title'} = chop_str($title, 80, 5);
2475                         # remove leading stuff of merges to make the interesting part visible
2476                         if (length($title) > 50) {
2477                                 $title =~ s/^Automatic //;
2478                                 $title =~ s/^merge (of|with) /Merge ... /i;
2479                                 if (length($title) > 50) {
2480                                         $title =~ s/(http|rsync):\/\///;
2481                                 }
2482                                 if (length($title) > 50) {
2483                                         $title =~ s/(master|www|rsync)\.//;
2484                                 }
2485                                 if (length($title) > 50) {
2486                                         $title =~ s/kernel.org:?//;
2487                                 }
2488                                 if (length($title) > 50) {
2489                                         $title =~ s/\/pub\/scm//;
2490                                 }
2491                         }
2492                         $co{'title_short'} = chop_str($title, 50, 5);
2493                         last;
2494                 }
2495         }
2496         if (! defined $co{'title'} || $co{'title'} eq "") {
2497                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2498         }
2499         # remove added spaces
2500         foreach my $line (@commit_lines) {
2501                 $line =~ s/^    //;
2502         }
2503         $co{'comment'} = \@commit_lines;
2504
2505         my $age = time - $co{'committer_epoch'};
2506         $co{'age'} = $age;
2507         $co{'age_string'} = age_string($age);
2508         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2509         if ($age > 60*60*24*7*2) {
2510                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2511                 $co{'age_string_age'} = $co{'age_string'};
2512         } else {
2513                 $co{'age_string_date'} = $co{'age_string'};
2514                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2515         }
2516         return %co;
2517 }
2518
2519 sub parse_commit {
2520         my ($commit_id) = @_;
2521         my %co;
2522
2523         local $/ = "\0";
2524
2525         open my $fd, "-|", git_cmd(), "rev-list",
2526                 "--parents",
2527                 "--header",
2528                 "--max-count=1",
2529                 $commit_id,
2530                 "--",
2531                 or die_error(500, "Open git-rev-list failed");
2532         %co = parse_commit_text(<$fd>, 1);
2533         close $fd;
2534
2535         return %co;
2536 }
2537
2538 sub parse_commits {
2539         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2540         my @cos;
2541
2542         $maxcount ||= 1;
2543         $skip ||= 0;
2544
2545         local $/ = "\0";
2546
2547         open my $fd, "-|", git_cmd(), "rev-list",
2548                 "--header",
2549                 @args,
2550                 ("--max-count=" . $maxcount),
2551                 ("--skip=" . $skip),
2552                 @extra_options,
2553                 $commit_id,
2554                 "--",
2555                 ($filename ? ($filename) : ())
2556                 or die_error(500, "Open git-rev-list failed");
2557         while (my $line = <$fd>) {
2558                 my %co = parse_commit_text($line);
2559                 push @cos, \%co;
2560         }
2561         close $fd;
2562
2563         return wantarray ? @cos : \@cos;
2564 }
2565
2566 # parse line of git-diff-tree "raw" output
2567 sub parse_difftree_raw_line {
2568         my $line = shift;
2569         my %res;
2570
2571         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2572         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2573         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2574                 $res{'from_mode'} = $1;
2575                 $res{'to_mode'} = $2;
2576                 $res{'from_id'} = $3;
2577                 $res{'to_id'} = $4;
2578                 $res{'status'} = $5;
2579                 $res{'similarity'} = $6;
2580                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2581                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2582                 } else {
2583                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2584                 }
2585         }
2586         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2587         # combined diff (for merge commit)
2588         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2589                 $res{'nparents'}  = length($1);
2590                 $res{'from_mode'} = [ split(' ', $2) ];
2591                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2592                 $res{'from_id'} = [ split(' ', $3) ];
2593                 $res{'to_id'} = pop @{$res{'from_id'}};
2594                 $res{'status'} = [ split('', $4) ];
2595                 $res{'to_file'} = unquote($5);
2596         }
2597         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2598         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2599                 $res{'commit'} = $1;
2600         }
2601
2602         return wantarray ? %res : \%res;
2603 }
2604
2605 # wrapper: return parsed line of git-diff-tree "raw" output
2606 # (the argument might be raw line, or parsed info)
2607 sub parsed_difftree_line {
2608         my $line_or_ref = shift;
2609
2610         if (ref($line_or_ref) eq "HASH") {
2611                 # pre-parsed (or generated by hand)
2612                 return $line_or_ref;
2613         } else {
2614                 return parse_difftree_raw_line($line_or_ref);
2615         }
2616 }
2617
2618 # parse line of git-ls-tree output
2619 sub parse_ls_tree_line {
2620         my $line = shift;
2621         my %opts = @_;
2622         my %res;
2623
2624         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2625         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2626
2627         $res{'mode'} = $1;
2628         $res{'type'} = $2;
2629         $res{'hash'} = $3;
2630         if ($opts{'-z'}) {
2631                 $res{'name'} = $4;
2632         } else {
2633                 $res{'name'} = unquote($4);
2634         }
2635
2636         return wantarray ? %res : \%res;
2637 }
2638
2639 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2640 sub parse_from_to_diffinfo {
2641         my ($diffinfo, $from, $to, @parents) = @_;
2642
2643         if ($diffinfo->{'nparents'}) {
2644                 # combined diff
2645                 $from->{'file'} = [];
2646                 $from->{'href'} = [];
2647                 fill_from_file_info($diffinfo, @parents)
2648                         unless exists $diffinfo->{'from_file'};
2649                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2650                         $from->{'file'}[$i] =
2651                                 defined $diffinfo->{'from_file'}[$i] ?
2652                                         $diffinfo->{'from_file'}[$i] :
2653                                         $diffinfo->{'to_file'};
2654                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2655                                 $from->{'href'}[$i] = href(action=>"blob",
2656                                                            hash_base=>$parents[$i],
2657                                                            hash=>$diffinfo->{'from_id'}[$i],
2658                                                            file_name=>$from->{'file'}[$i]);
2659                         } else {
2660                                 $from->{'href'}[$i] = undef;
2661                         }
2662                 }
2663         } else {
2664                 # ordinary (not combined) diff
2665                 $from->{'file'} = $diffinfo->{'from_file'};
2666                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2667                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2668                                                hash=>$diffinfo->{'from_id'},
2669                                                file_name=>$from->{'file'});
2670                 } else {
2671                         delete $from->{'href'};
2672                 }
2673         }
2674
2675         $to->{'file'} = $diffinfo->{'to_file'};
2676         if (!is_deleted($diffinfo)) { # file exists in result
2677                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2678                                      hash=>$diffinfo->{'to_id'},
2679                                      file_name=>$to->{'file'});
2680         } else {
2681                 delete $to->{'href'};
2682         }
2683 }
2684
2685 ## ......................................................................
2686 ## parse to array of hashes functions
2687
2688 sub git_get_heads_list {
2689         my $limit = shift;
2690         my @headslist;
2691
2692         open my $fd, '-|', git_cmd(), 'for-each-ref',
2693                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2694                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2695                 'refs/heads'
2696                 or return;
2697         while (my $line = <$fd>) {
2698                 my %ref_item;
2699
2700                 chomp $line;
2701                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2702                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2703                 my ($committer, $epoch, $tz) =
2704                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2705                 $ref_item{'fullname'}  = $name;
2706                 $name =~ s!^refs/heads/!!;
2707
2708                 $ref_item{'name'}  = $name;
2709                 $ref_item{'id'}    = $hash;
2710                 $ref_item{'title'} = $title || '(no commit message)';
2711                 $ref_item{'epoch'} = $epoch;
2712                 if ($epoch) {
2713                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2714                 } else {
2715                         $ref_item{'age'} = "unknown";
2716                 }
2717
2718                 push @headslist, \%ref_item;
2719         }
2720         close $fd;
2721
2722         return wantarray ? @headslist : \@headslist;
2723 }
2724
2725 sub git_get_tags_list {
2726         my $limit = shift;
2727         my @tagslist;
2728
2729         open my $fd, '-|', git_cmd(), 'for-each-ref',
2730                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2731                 '--format=%(objectname) %(objecttype) %(refname) '.
2732                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2733                 'refs/tags'
2734                 or return;
2735         while (my $line = <$fd>) {
2736                 my %ref_item;
2737
2738                 chomp $line;
2739                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2740                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2741                 my ($creator, $epoch, $tz) =
2742                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2743                 $ref_item{'fullname'} = $name;
2744                 $name =~ s!^refs/tags/!!;
2745
2746                 $ref_item{'type'} = $type;
2747                 $ref_item{'id'} = $id;
2748                 $ref_item{'name'} = $name;
2749                 if ($type eq "tag") {
2750                         $ref_item{'subject'} = $title;
2751                         $ref_item{'reftype'} = $reftype;
2752                         $ref_item{'refid'}   = $refid;
2753                 } else {
2754                         $ref_item{'reftype'} = $type;
2755                         $ref_item{'refid'}   = $id;
2756                 }
2757
2758                 if ($type eq "tag" || $type eq "commit") {
2759                         $ref_item{'epoch'} = $epoch;
2760                         if ($epoch) {
2761                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2762                         } else {
2763                                 $ref_item{'age'} = "unknown";
2764                         }
2765                 }
2766
2767                 push @tagslist, \%ref_item;
2768         }
2769         close $fd;
2770
2771         return wantarray ? @tagslist : \@tagslist;
2772 }
2773
2774 ## ----------------------------------------------------------------------
2775 ## filesystem-related functions
2776
2777 sub get_file_owner {
2778         my $path = shift;
2779
2780         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2781         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2782         if (!defined $gcos) {
2783                 return undef;
2784         }
2785         my $owner = $gcos;
2786         $owner =~ s/[,;].*$//;
2787         return to_utf8($owner);
2788 }
2789
2790 # assume that file exists
2791 sub insert_file {
2792         my $filename = shift;
2793
2794         open my $fd, '<', $filename;
2795         print map { to_utf8($_) } <$fd>;
2796         close $fd;
2797 }
2798
2799 ## ......................................................................
2800 ## mimetype related functions
2801
2802 sub mimetype_guess_file {
2803         my $filename = shift;
2804         my $mimemap = shift;
2805         -r $mimemap or return undef;
2806
2807         my %mimemap;
2808         open(my $mh, '<', $mimemap) or return undef;
2809         while (<$mh>) {
2810                 next if m/^#/; # skip comments
2811                 my ($mimetype, $exts) = split(/\t+/);
2812                 if (defined $exts) {
2813                         my @exts = split(/\s+/, $exts);
2814                         foreach my $ext (@exts) {
2815                                 $mimemap{$ext} = $mimetype;
2816                         }
2817                 }
2818         }
2819         close($mh);
2820
2821         $filename =~ /\.([^.]*)$/;
2822         return $mimemap{$1};
2823 }
2824
2825 sub mimetype_guess {
2826         my $filename = shift;
2827         my $mime;
2828         $filename =~ /\./ or return undef;
2829
2830         if ($mimetypes_file) {
2831                 my $file = $mimetypes_file;
2832                 if ($file !~ m!^/!) { # if it is relative path
2833                         # it is relative to project
2834                         $file = "$projectroot/$project/$file";
2835                 }
2836                 $mime = mimetype_guess_file($filename, $file);
2837         }
2838         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2839         return $mime;
2840 }
2841
2842 sub blob_mimetype {
2843         my $fd = shift;
2844         my $filename = shift;
2845
2846         if ($filename) {
2847                 my $mime = mimetype_guess($filename);
2848                 $mime and return $mime;
2849         }
2850
2851         # just in case
2852         return $default_blob_plain_mimetype unless $fd;
2853
2854         if (-T $fd) {
2855                 return 'text/plain';
2856         } elsif (! $filename) {
2857                 return 'application/octet-stream';
2858         } elsif ($filename =~ m/\.png$/i) {
2859                 return 'image/png';
2860         } elsif ($filename =~ m/\.gif$/i) {
2861                 return 'image/gif';
2862         } elsif ($filename =~ m/\.jpe?g$/i) {
2863                 return 'image/jpeg';
2864         } else {
2865                 return 'application/octet-stream';
2866         }
2867 }
2868
2869 sub blob_contenttype {
2870         my ($fd, $file_name, $type) = @_;
2871
2872         $type ||= blob_mimetype($fd, $file_name);
2873         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
2874                 $type .= "; charset=$default_text_plain_charset";
2875         }
2876
2877         return $type;
2878 }
2879
2880 ## ======================================================================
2881 ## functions printing HTML: header, footer, error page
2882
2883 sub git_header_html {
2884         my $status = shift || "200 OK";
2885         my $expires = shift;
2886
2887         my $title = "$site_name";
2888         if (defined $project) {
2889                 $title .= " - " . to_utf8($project);
2890                 if (defined $action) {
2891                         $title .= "/$action";
2892                         if (defined $file_name) {
2893                                 $title .= " - " . esc_path($file_name);
2894                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2895                                         $title .= "/";
2896                                 }
2897                         }
2898                 }
2899         }
2900         my $content_type;
2901         # require explicit support from the UA if we are to send the page as
2902         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2903         # we have to do this because MSIE sometimes globs '*/*', pretending to
2904         # support xhtml+xml but choking when it gets what it asked for.
2905         if (defined $cgi->http('HTTP_ACCEPT') &&
2906             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2907             $cgi->Accept('application/xhtml+xml') != 0) {
2908                 $content_type = 'application/xhtml+xml';
2909         } else {
2910                 $content_type = 'text/html';
2911         }
2912         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2913                            -status=> $status, -expires => $expires);
2914         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2915         print <<EOF;
2916 <?xml version="1.0" encoding="utf-8"?>
2917 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2918 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2919 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2920 <!-- git core binaries version $git_version -->
2921 <head>
2922 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2923 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2924 <meta name="robots" content="index, nofollow"/>
2925 <title>$title</title>
2926 EOF
2927         # the stylesheet, favicon etc urls won't work correctly with path_info
2928         # unless we set the appropriate base URL
2929         if ($ENV{'PATH_INFO'}) {
2930                 print "<base href=\"".esc_url($base_url)."\" />\n";
2931         }
2932         # print out each stylesheet that exist, providing backwards capability
2933         # for those people who defined $stylesheet in a config file
2934         if (defined $stylesheet) {
2935                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2936         } else {
2937                 foreach my $stylesheet (@stylesheets) {
2938                         next unless $stylesheet;
2939                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2940                 }
2941         }
2942         if (defined $project) {
2943                 my %href_params = get_feed_info();
2944                 if (!exists $href_params{'-title'}) {
2945                         $href_params{'-title'} = 'log';
2946                 }
2947
2948                 foreach my $format qw(RSS Atom) {
2949                         my $type = lc($format);
2950                         my %link_attr = (
2951                                 '-rel' => 'alternate',
2952                                 '-title' => "$project - $href_params{'-title'} - $format feed",
2953                                 '-type' => "application/$type+xml"
2954                         );
2955
2956                         $href_params{'action'} = $type;
2957                         $link_attr{'-href'} = href(%href_params);
2958                         print "<link ".
2959                               "rel=\"$link_attr{'-rel'}\" ".
2960                               "title=\"$link_attr{'-title'}\" ".
2961                               "href=\"$link_attr{'-href'}\" ".
2962                               "type=\"$link_attr{'-type'}\" ".
2963                               "/>\n";
2964
2965                         $href_params{'extra_options'} = '--no-merges';
2966                         $link_attr{'-href'} = href(%href_params);
2967                         $link_attr{'-title'} .= ' (no merges)';
2968                         print "<link ".
2969                               "rel=\"$link_attr{'-rel'}\" ".
2970                               "title=\"$link_attr{'-title'}\" ".
2971                               "href=\"$link_attr{'-href'}\" ".
2972                               "type=\"$link_attr{'-type'}\" ".
2973                               "/>\n";
2974                 }
2975
2976         } else {
2977                 printf('<link rel="alternate" title="%s projects list" '.
2978                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
2979                        $site_name, href(project=>undef, action=>"project_index"));
2980                 printf('<link rel="alternate" title="%s projects feeds" '.
2981                        'href="%s" type="text/x-opml" />'."\n",
2982                        $site_name, href(project=>undef, action=>"opml"));
2983         }
2984         if (defined $favicon) {
2985                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
2986         }
2987
2988         print "</head>\n" .
2989               "<body>\n";
2990
2991         if (-f $site_header) {
2992                 insert_file($site_header);
2993         }
2994
2995         print "<div class=\"page_header\">\n" .
2996               $cgi->a({-href => esc_url($logo_url),
2997                        -title => $logo_label},
2998                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2999         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3000         if (defined $project) {
3001                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3002                 if (defined $action) {
3003                         print " / $action";
3004                 }
3005                 print "\n";
3006         }
3007         print "</div>\n";
3008
3009         my $have_search = gitweb_check_feature('search');
3010         if (defined $project && $have_search) {
3011                 if (!defined $searchtext) {
3012                         $searchtext = "";
3013                 }
3014                 my $search_hash;
3015                 if (defined $hash_base) {
3016                         $search_hash = $hash_base;
3017                 } elsif (defined $hash) {
3018                         $search_hash = $hash;
3019                 } else {
3020                         $search_hash = "HEAD";
3021                 }
3022                 my $action = $my_uri;
3023                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3024                 if ($use_pathinfo) {
3025                         $action .= "/".esc_url($project);
3026                 }
3027                 print $cgi->startform(-method => "get", -action => $action) .
3028                       "<div class=\"search\">\n" .
3029                       (!$use_pathinfo &&
3030                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3031                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3032                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3033                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3034                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3035                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3036                       " search:\n",
3037                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3038                       "<span title=\"Extended regular expression\">" .
3039                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3040                                      -checked => $search_use_regexp) .
3041                       "</span>" .
3042                       "</div>" .
3043                       $cgi->end_form() . "\n";
3044         }
3045 }
3046
3047 sub git_footer_html {
3048         my $feed_class = 'rss_logo';
3049
3050         print "<div class=\"page_footer\">\n";
3051         if (defined $project) {
3052                 my $descr = git_get_project_description($project);
3053                 if (defined $descr) {
3054                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3055                 }
3056
3057                 my %href_params = get_feed_info();
3058                 if (!%href_params) {
3059                         $feed_class .= ' generic';
3060                 }
3061                 $href_params{'-title'} ||= 'log';
3062
3063                 foreach my $format qw(RSS Atom) {
3064                         $href_params{'action'} = lc($format);
3065                         print $cgi->a({-href => href(%href_params),
3066                                       -title => "$href_params{'-title'} $format feed",
3067                                       -class => $feed_class}, $format)."\n";
3068                 }
3069
3070         } else {
3071                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3072                               -class => $feed_class}, "OPML") . " ";
3073                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3074                               -class => $feed_class}, "TXT") . "\n";
3075         }
3076         print "</div>\n"; # class="page_footer"
3077
3078         if (-f $site_footer) {
3079                 insert_file($site_footer);
3080         }
3081
3082         print "</body>\n" .
3083               "</html>";
3084 }
3085
3086 # die_error(<http_status_code>, <error_message>)
3087 # Example: die_error(404, 'Hash not found')
3088 # By convention, use the following status codes (as defined in RFC 2616):
3089 # 400: Invalid or missing CGI parameters, or
3090 #      requested object exists but has wrong type.
3091 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3092 #      this server or project.
3093 # 404: Requested object/revision/project doesn't exist.
3094 # 500: The server isn't configured properly, or
3095 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3096 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3097 sub die_error {
3098         my $status = shift || 500;
3099         my $error = shift || "Internal server error";
3100
3101         my %http_responses = (400 => '400 Bad Request',
3102                               403 => '403 Forbidden',
3103                               404 => '404 Not Found',
3104                               500 => '500 Internal Server Error');
3105         git_header_html($http_responses{$status});
3106         print <<EOF;
3107 <div class="page_body">
3108 <br /><br />
3109 $status - $error
3110 <br />
3111 </div>
3112 EOF
3113         git_footer_html();
3114         exit;
3115 }
3116
3117 ## ----------------------------------------------------------------------
3118 ## functions printing or outputting HTML: navigation
3119
3120 sub git_print_page_nav {
3121         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3122         $extra = '' if !defined $extra; # pager or formats
3123
3124         my @navs = qw(summary log commit commitdiff tree);
3125         if ($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                         $arg{'log'}{'hash'} = $head;
3136                 }
3137         }
3138
3139         $arg{'log'}{'action'} = 'shortlog';
3140         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3141         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3142
3143         my @actions = gitweb_get_feature('actions');
3144         my %repl = (
3145                 '%' => '%',
3146                 'n' => $project,         # project name
3147                 'f' => $git_dir,         # project path within filesystem
3148                 'h' => $treehead || '',  # current hash ('h' parameter)
3149                 'b' => $treebase || '',  # hash base ('hb' parameter)
3150         );
3151         while (@actions) {
3152                 my ($label, $link, $pos) = splice(@actions,0,3);
3153                 # insert
3154                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3155                 # munch munch
3156                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3157                 $arg{$label}{'_href'} = $link;
3158         }
3159
3160         print "<div class=\"page_nav\">\n" .
3161                 (join " | ",
3162                  map { $_ eq $current ?
3163                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3164                  } @navs);
3165         print "<br/>\n$extra<br/>\n" .
3166               "</div>\n";
3167 }
3168
3169 sub format_paging_nav {
3170         my ($action, $hash, $head, $page, $has_next_link) = @_;
3171         my $paging_nav;
3172
3173
3174         if ($hash ne $head || $page) {
3175                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3176         } else {
3177                 $paging_nav .= "HEAD";
3178         }
3179
3180         if ($page > 0) {
3181                 $paging_nav .= " &sdot; " .
3182                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3183                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3184         } else {
3185                 $paging_nav .= " &sdot; prev";
3186         }
3187
3188         if ($has_next_link) {
3189                 $paging_nav .= " &sdot; " .
3190                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3191                                  -accesskey => "n", -title => "Alt-n"}, "next");
3192         } else {
3193                 $paging_nav .= " &sdot; next";
3194         }
3195
3196         return $paging_nav;
3197 }
3198
3199 sub format_log_nav {
3200         my ($action, $hash, $head, $page, $has_next_link) = @_;
3201         my $paging_nav;
3202
3203         if ($action eq 'shortlog') {
3204                 $paging_nav .= 'shortlog';
3205         } else {
3206                 $paging_nav .= $cgi->a({-href => href(action=>'shortlog', -replay=>1)}, 'shortlog');
3207         }
3208         $paging_nav .= ' | ';
3209         if ($action eq 'log') {
3210                 $paging_nav .= 'fulllog';
3211         } else {
3212                 $paging_nav .= $cgi->a({-href => href(action=>'log', -replay=>1)}, 'fulllog');
3213         }
3214
3215         $paging_nav .= " | " . format_paging_nav($action, $hash, $head, $page, $has_next_link);
3216         return $paging_nav;
3217 }
3218
3219 ## ......................................................................
3220 ## functions printing or outputting HTML: div
3221
3222 sub git_print_header_div {
3223         my ($action, $title, $hash, $hash_base) = @_;
3224         my %args = ();
3225
3226         $args{'action'} = $action;
3227         $args{'hash'} = $hash if $hash;
3228         $args{'hash_base'} = $hash_base if $hash_base;
3229
3230         print "<div class=\"header\">\n" .
3231               $cgi->a({-href => href(%args), -class => "title"},
3232               $title ? $title : $action) .
3233               "\n</div>\n";
3234 }
3235
3236 sub git_print_authorship {
3237         my $co = shift;
3238
3239         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3240         print "<div class=\"author_date\">" .
3241               esc_html($co->{'author_name'}) .
3242               " [$ad{'rfc2822'}";
3243         if ($ad{'hour_local'} < 6) {
3244                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3245                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3246         } else {
3247                 printf(" (%02d:%02d %s)",
3248                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3249         }
3250         print "]</div>\n";
3251 }
3252
3253 sub git_print_page_path {
3254         my $name = shift;
3255         my $type = shift;
3256         my $hb = shift;
3257
3258
3259         print "<div class=\"page_path\">";
3260         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3261                       -title => 'tree root'}, to_utf8("[$project]"));
3262         print " / ";
3263         if (defined $name) {
3264                 my @dirname = split '/', $name;
3265                 my $basename = pop @dirname;
3266                 my $fullname = '';
3267
3268                 foreach my $dir (@dirname) {
3269                         $fullname .= ($fullname ? '/' : '') . $dir;
3270                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3271                                                      hash_base=>$hb),
3272                                       -title => $fullname}, esc_path($dir));
3273                         print " / ";
3274                 }
3275                 if (defined $type && $type eq 'blob') {
3276                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3277                                                      hash_base=>$hb),
3278                                       -title => $name}, esc_path($basename));
3279                 } elsif (defined $type && $type eq 'tree') {
3280                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3281                                                      hash_base=>$hb),
3282                                       -title => $name}, esc_path($basename));
3283                         print " / ";
3284                 } else {
3285                         print esc_path($basename);
3286                 }
3287         }
3288         print "<br/></div>\n";
3289 }
3290
3291 sub git_print_log {
3292         my $log = shift;
3293         my %opts = @_;
3294
3295         if ($opts{'-remove_title'}) {
3296                 # remove title, i.e. first line of log
3297                 shift @$log;
3298         }
3299         # remove leading empty lines
3300         while (defined $log->[0] && $log->[0] eq "") {
3301                 shift @$log;
3302         }
3303
3304         # print log
3305         my $signoff = 0;
3306         my $empty = 0;
3307         foreach my $line (@$log) {
3308                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3309                         $signoff = 1;
3310                         $empty = 0;
3311                         if (! $opts{'-remove_signoff'}) {
3312                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3313                                 next;
3314                         } else {
3315                                 # remove signoff lines
3316                                 next;
3317                         }
3318                 } else {
3319                         $signoff = 0;
3320                 }
3321
3322                 # print only one empty line
3323                 # do not print empty line after signoff
3324                 if ($line eq "") {
3325                         next if ($empty || $signoff);
3326                         $empty = 1;
3327                 } else {
3328                         $empty = 0;
3329                 }
3330
3331                 print format_log_line_html($line) . "<br/>\n";
3332         }
3333
3334         if ($opts{'-final_empty_line'}) {
3335                 # end with single empty line
3336                 print "<br/>\n" unless $empty;
3337         }
3338 }
3339
3340 # return link target (what link points to)
3341 sub git_get_link_target {
3342         my $hash = shift;
3343         my $link_target;
3344
3345         # read link
3346         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3347                 or return;
3348         {
3349                 local $/ = undef;
3350                 $link_target = <$fd>;
3351         }
3352         close $fd
3353                 or return;
3354
3355         return $link_target;
3356 }
3357
3358 # given link target, and the directory (basedir) the link is in,
3359 # return target of link relative to top directory (top tree);
3360 # return undef if it is not possible (including absolute links).
3361 sub normalize_link_target {
3362         my ($link_target, $basedir) = @_;
3363
3364         # absolute symlinks (beginning with '/') cannot be normalized
3365         return if (substr($link_target, 0, 1) eq '/');
3366
3367         # normalize link target to path from top (root) tree (dir)
3368         my $path;
3369         if ($basedir) {
3370                 $path = $basedir . '/' . $link_target;
3371         } else {
3372                 # we are in top (root) tree (dir)
3373                 $path = $link_target;
3374         }
3375
3376         # remove //, /./, and /../
3377         my @path_parts;
3378         foreach my $part (split('/', $path)) {
3379                 # discard '.' and ''
3380                 next if (!$part || $part eq '.');
3381                 # handle '..'
3382                 if ($part eq '..') {
3383                         if (@path_parts) {
3384                                 pop @path_parts;
3385                         } else {
3386                                 # link leads outside repository (outside top dir)
3387                                 return;
3388                         }
3389                 } else {
3390                         push @path_parts, $part;
3391                 }
3392         }
3393         $path = join('/', @path_parts);
3394
3395         return $path;
3396 }
3397
3398 # print tree entry (row of git_tree), but without encompassing <tr> element
3399 sub git_print_tree_entry {
3400         my ($t, $basedir, $hash_base, $have_blame) = @_;
3401
3402         my %base_key = ();
3403         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3404
3405         # The format of a table row is: mode list link.  Where mode is
3406         # the mode of the entry, list is the name of the entry, an href,
3407         # and link is the action links of the entry.
3408
3409         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3410         if ($t->{'type'} eq "blob") {
3411                 print "<td class=\"list\">" .
3412                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3413                                                file_name=>"$basedir$t->{'name'}", %base_key),
3414                                 -class => "list"}, esc_path($t->{'name'}));
3415                 if (S_ISLNK(oct $t->{'mode'})) {
3416                         my $link_target = git_get_link_target($t->{'hash'});
3417                         if ($link_target) {
3418                                 my $norm_target = normalize_link_target($link_target, $basedir);
3419                                 if (defined $norm_target) {
3420                                         print " -> " .
3421                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3422                                                                      file_name=>$norm_target),
3423                                                        -title => $norm_target}, esc_path($link_target));
3424                                 } else {
3425                                         print " -> " . esc_path($link_target);
3426                                 }
3427                         }
3428                 }
3429                 print "</td>\n";
3430                 print "<td class=\"link\">";
3431                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3432                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3433                               "blob");
3434                 if ($have_blame) {
3435                         print " | " .
3436                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3437                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3438                                       "blame");
3439                 }
3440                 if (defined $hash_base) {
3441                         print " | " .
3442                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3443                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3444                                       "history");
3445                 }
3446                 print " | " .
3447                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3448                                                file_name=>"$basedir$t->{'name'}")},
3449                                 "raw");
3450                 print "</td>\n";
3451
3452         } elsif ($t->{'type'} eq "tree") {
3453                 print "<td class=\"list\">";
3454                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3455                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3456                               esc_path($t->{'name'}));
3457                 print "</td>\n";
3458                 print "<td class=\"link\">";
3459                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3460                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3461                               "tree");
3462                 if (defined $hash_base) {
3463                         print " | " .
3464                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3465                                                      file_name=>"$basedir$t->{'name'}")},
3466                                       "history");
3467                 }
3468                 print "</td>\n";
3469         } else {
3470                 # unknown object: we can only present history for it
3471                 # (this includes 'commit' object, i.e. submodule support)
3472                 print "<td class=\"list\">" .
3473                       esc_path($t->{'name'}) .
3474                       "</td>\n";
3475                 print "<td class=\"link\">";
3476                 if (defined $hash_base) {
3477                         print $cgi->a({-href => href(action=>"history",
3478                                                      hash_base=>$hash_base,
3479                                                      file_name=>"$basedir$t->{'name'}")},
3480                                       "history");
3481                 }
3482                 print "</td>\n";
3483         }
3484 }
3485
3486 ## ......................................................................
3487 ## functions printing large fragments of HTML
3488
3489 # get pre-image filenames for merge (combined) diff
3490 sub fill_from_file_info {
3491         my ($diff, @parents) = @_;
3492
3493         $diff->{'from_file'} = [ ];
3494         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3495         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3496                 if ($diff->{'status'}[$i] eq 'R' ||
3497                     $diff->{'status'}[$i] eq 'C') {
3498                         $diff->{'from_file'}[$i] =
3499                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3500                 }
3501         }
3502
3503         return $diff;
3504 }
3505
3506 # is current raw difftree line of file deletion
3507 sub is_deleted {
3508         my $diffinfo = shift;
3509
3510         return $diffinfo->{'to_id'} eq ('0' x 40);
3511 }
3512
3513 # does patch correspond to [previous] difftree raw line
3514 # $diffinfo  - hashref of parsed raw diff format
3515 # $patchinfo - hashref of parsed patch diff format
3516 #              (the same keys as in $diffinfo)
3517 sub is_patch_split {
3518         my ($diffinfo, $patchinfo) = @_;
3519
3520         return defined $diffinfo && defined $patchinfo
3521                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3522 }
3523
3524
3525 sub git_difftree_body {
3526         my ($difftree, $hash, @parents) = @_;
3527         my ($parent) = $parents[0];
3528         my $have_blame = gitweb_check_feature('blame');
3529         print "<div class=\"list_head\">\n";
3530         if ($#{$difftree} > 10) {
3531                 print(($#{$difftree} + 1) . " files changed:\n");
3532         }
3533         print "</div>\n";
3534
3535         print "<table class=\"" .
3536               (@parents > 1 ? "combined " : "") .
3537               "diff_tree\">\n";
3538
3539         # header only for combined diff in 'commitdiff' view
3540         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3541         if ($has_header) {
3542                 # table header
3543                 print "<thead><tr>\n" .
3544                        "<th></th><th></th>\n"; # filename, patchN link
3545                 for (my $i = 0; $i < @parents; $i++) {
3546                         my $par = $parents[$i];
3547                         print "<th>" .
3548                               $cgi->a({-href => href(action=>"commitdiff",
3549                                                      hash=>$hash, hash_parent=>$par),
3550                                        -title => 'commitdiff to parent number ' .
3551                                                   ($i+1) . ': ' . substr($par,0,7)},
3552                                       $i+1) .
3553                               "&nbsp;</th>\n";
3554                 }
3555                 print "</tr></thead>\n<tbody>\n";
3556         }
3557
3558         my $alternate = 1;
3559         my $patchno = 0;
3560         foreach my $line (@{$difftree}) {
3561                 my $diff = parsed_difftree_line($line);
3562
3563                 if ($alternate) {
3564                         print "<tr class=\"dark\">\n";
3565                 } else {
3566                         print "<tr class=\"light\">\n";
3567                 }
3568                 $alternate ^= 1;
3569
3570                 if (exists $diff->{'nparents'}) { # combined diff
3571
3572                         fill_from_file_info($diff, @parents)
3573                                 unless exists $diff->{'from_file'};
3574
3575                         if (!is_deleted($diff)) {
3576                                 # file exists in the result (child) commit
3577                                 print "<td>" .
3578                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3579                                                              file_name=>$diff->{'to_file'},
3580                                                              hash_base=>$hash),
3581                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3582                                       "</td>\n";
3583                         } else {
3584                                 print "<td>" .
3585                                       esc_path($diff->{'to_file'}) .
3586                                       "</td>\n";
3587                         }
3588
3589                         if ($action eq 'commitdiff') {
3590                                 # link to patch
3591                                 $patchno++;
3592                                 print "<td class=\"link\">" .
3593                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3594                                       " | " .
3595                                       "</td>\n";
3596                         }
3597
3598                         my $has_history = 0;
3599                         my $not_deleted = 0;
3600                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3601                                 my $hash_parent = $parents[$i];
3602                                 my $from_hash = $diff->{'from_id'}[$i];
3603                                 my $from_path = $diff->{'from_file'}[$i];
3604                                 my $status = $diff->{'status'}[$i];
3605
3606                                 $has_history ||= ($status ne 'A');
3607                                 $not_deleted ||= ($status ne 'D');
3608
3609                                 if ($status eq 'A') {
3610                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3611                                 } elsif ($status eq 'D') {
3612                                         print "<td class=\"link\">" .
3613                                               $cgi->a({-href => href(action=>"blob",
3614                                                                      hash_base=>$hash,
3615                                                                      hash=>$from_hash,
3616                                                                      file_name=>$from_path)},
3617                                                       "blob" . ($i+1)) .
3618                                               " | </td>\n";
3619                                 } else {
3620                                         if ($diff->{'to_id'} eq $from_hash) {
3621                                                 print "<td class=\"link nochange\">";
3622                                         } else {
3623                                                 print "<td class=\"link\">";
3624                                         }
3625                                         print $cgi->a({-href => href(action=>"blobdiff",
3626                                                                      hash=>$diff->{'to_id'},
3627                                                                      hash_parent=>$from_hash,
3628                                                                      hash_base=>$hash,
3629                                                                      hash_parent_base=>$hash_parent,
3630                                                                      file_name=>$diff->{'to_file'},
3631                                                                      file_parent=>$from_path)},
3632                                                       "diff" . ($i+1)) .
3633                                               " | </td>\n";
3634                                 }
3635                         }
3636
3637                         print "<td class=\"link\">";
3638                         if ($not_deleted) {
3639                                 print $cgi->a({-href => href(action=>"blob",
3640                                                              hash=>$diff->{'to_id'},
3641                                                              file_name=>$diff->{'to_file'},
3642                                                              hash_base=>$hash)},
3643                                               "blob");
3644                                 print " | " if ($has_history);
3645                         }
3646                         if ($has_history) {
3647                                 print $cgi->a({-href => href(action=>"history",
3648                                                              file_name=>$diff->{'to_file'},
3649                                                              hash_base=>$hash)},
3650                                               "history");
3651                         }
3652                         print "</td>\n";
3653
3654                         print "</tr>\n";
3655                         next; # instead of 'else' clause, to avoid extra indent
3656                 }
3657                 # else ordinary diff
3658
3659                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3660                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3661                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3662                         $to_mode_oct = oct $diff->{'to_mode'};
3663                         if (S_ISREG($to_mode_oct)) { # only for regular file
3664                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3665                         }
3666                         $to_file_type = file_type($diff->{'to_mode'});
3667                 }
3668                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3669                         $from_mode_oct = oct $diff->{'from_mode'};
3670                         if (S_ISREG($to_mode_oct)) { # only for regular file
3671                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3672                         }
3673                         $from_file_type = file_type($diff->{'from_mode'});
3674                 }
3675
3676                 if ($diff->{'status'} eq "A") { # created
3677                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3678                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3679                         $mode_chng   .= "]</span>";
3680                         print "<td>";
3681                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3682                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3683                                       -class => "list"}, esc_path($diff->{'file'}));
3684                         print "</td>\n";
3685                         print "<td>$mode_chng</td>\n";
3686                         print "<td class=\"link\">";
3687                         if ($action eq 'commitdiff') {
3688                                 # link to patch
3689                                 $patchno++;
3690                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3691                                 print " | ";
3692                         }
3693                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3694                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3695                                       "blob");
3696                         print "</td>\n";
3697
3698                 } elsif ($diff->{'status'} eq "D") { # deleted
3699                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3700                         print "<td>";
3701                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3702                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3703                                        -class => "list"}, esc_path($diff->{'file'}));
3704                         print "</td>\n";
3705                         print "<td>$mode_chng</td>\n";
3706                         print "<td class=\"link\">";
3707                         if ($action eq 'commitdiff') {
3708                                 # link to patch
3709                                 $patchno++;
3710                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3711                                 print " | ";
3712                         }
3713                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3714                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3715                                       "blob") . " | ";
3716                         if ($have_blame) {
3717                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3718                                                              file_name=>$diff->{'file'})},
3719                                               "blame") . " | ";
3720                         }
3721                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3722                                                      file_name=>$diff->{'file'})},
3723                                       "history");
3724                         print "</td>\n";
3725
3726                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3727                         my $mode_chnge = "";
3728                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3729                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3730                                 if ($from_file_type ne $to_file_type) {
3731                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3732                                 }
3733                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3734                                         if ($from_mode_str && $to_mode_str) {
3735                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3736                                         } elsif ($to_mode_str) {
3737                                                 $mode_chnge .= " mode: $to_mode_str";
3738                                         }
3739                                 }
3740                                 $mode_chnge .= "]</span>\n";
3741                         }
3742                         print "<td>";
3743                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3744                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3745                                       -class => "list"}, esc_path($diff->{'file'}));
3746                         print "</td>\n";
3747                         print "<td>$mode_chnge</td>\n";
3748                         print "<td class=\"link\">";
3749                         if ($action eq 'commitdiff') {
3750                                 # link to patch
3751                                 $patchno++;
3752                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3753                                       " | ";
3754                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3755                                 # "commit" view and modified file (not onlu mode changed)
3756                                 print $cgi->a({-href => href(action=>"blobdiff",
3757                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3758                                                              hash_base=>$hash, hash_parent_base=>$parent,
3759                                                              file_name=>$diff->{'file'})},
3760                                               "diff") .
3761                                       " | ";
3762                         }
3763                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3764                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3765                                        "blob") . " | ";
3766                         if ($have_blame) {
3767                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3768                                                              file_name=>$diff->{'file'})},
3769                                               "blame") . " | ";
3770                         }
3771                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3772                                                      file_name=>$diff->{'file'})},
3773                                       "history");
3774                         print "</td>\n";
3775
3776                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3777                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3778                         my $nstatus = $status_name{$diff->{'status'}};
3779                         my $mode_chng = "";
3780                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3781                                 # mode also for directories, so we cannot use $to_mode_str
3782                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3783                         }
3784                         print "<td>" .
3785                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3786                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3787                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3788                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3789                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3790                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3791                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3792                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3793                               "<td class=\"link\">";
3794                         if ($action eq 'commitdiff') {
3795                                 # link to patch
3796                                 $patchno++;
3797                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3798                                       " | ";
3799                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3800                                 # "commit" view and modified file (not only pure rename or copy)
3801                                 print $cgi->a({-href => href(action=>"blobdiff",
3802                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3803                                                              hash_base=>$hash, hash_parent_base=>$parent,
3804                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3805                                               "diff") .
3806                                       " | ";
3807                         }
3808                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3809                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3810                                       "blob") . " | ";
3811                         if ($have_blame) {
3812                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3813                                                              file_name=>$diff->{'to_file'})},
3814                                               "blame") . " | ";
3815                         }
3816                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3817                                                     file_name=>$diff->{'to_file'})},
3818                                       "history");
3819                         print "</td>\n";
3820
3821                 } # we should not encounter Unmerged (U) or Unknown (X) status
3822                 print "</tr>\n";
3823         }
3824         print "</tbody>" if $has_header;
3825         print "</table>\n";
3826 }
3827
3828 sub git_patchset_body {
3829         my ($fd, $difftree, $hash, @hash_parents) = @_;
3830         my ($hash_parent) = $hash_parents[0];
3831
3832         my $is_combined = (@hash_parents > 1);
3833         my $patch_idx = 0;
3834         my $patch_number = 0;
3835         my $patch_line;
3836         my $diffinfo;
3837         my $to_name;
3838         my (%from, %to);
3839
3840         print "<div class=\"patchset\">\n";
3841
3842         # skip to first patch
3843         while ($patch_line = <$fd>) {
3844                 chomp $patch_line;
3845
3846                 last if ($patch_line =~ m/^diff /);
3847         }
3848
3849  PATCH:
3850         while ($patch_line) {
3851
3852                 # parse "git diff" header line
3853                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3854                         # $1 is from_name, which we do not use
3855                         $to_name = unquote($2);
3856                         $to_name =~ s!^b/!!;
3857                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3858                         # $1 is 'cc' or 'combined', which we do not use
3859                         $to_name = unquote($2);
3860                 } else {
3861                         $to_name = undef;
3862                 }
3863
3864                 # check if current patch belong to current raw line
3865                 # and parse raw git-diff line if needed
3866                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3867                         # this is continuation of a split patch
3868                         print "<div class=\"patch cont\">\n";
3869                 } else {
3870                         # advance raw git-diff output if needed
3871                         $patch_idx++ if defined $diffinfo;
3872
3873                         # read and prepare patch information
3874                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3875
3876                         # compact combined diff output can have some patches skipped
3877                         # find which patch (using pathname of result) we are at now;
3878                         if ($is_combined) {
3879                                 while ($to_name ne $diffinfo->{'to_file'}) {
3880                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3881                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3882                                               "</div>\n";  # class="patch"
3883
3884                                         $patch_idx++;
3885                                         $patch_number++;
3886
3887                                         last if $patch_idx > $#$difftree;
3888                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3889                                 }
3890                         }
3891
3892                         # modifies %from, %to hashes
3893                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3894
3895                         # this is first patch for raw difftree line with $patch_idx index
3896                         # we index @$difftree array from 0, but number patches from 1
3897                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3898                 }
3899
3900                 # git diff header
3901                 #assert($patch_line =~ m/^diff /) if DEBUG;
3902                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3903                 $patch_number++;
3904                 # print "git diff" header
3905                 print format_git_diff_header_line($patch_line, $diffinfo,
3906                                                   \%from, \%to);
3907
3908                 # print extended diff header
3909                 print "<div class=\"diff extended_header\">\n";
3910         EXTENDED_HEADER:
3911                 while ($patch_line = <$fd>) {
3912                         chomp $patch_line;
3913
3914                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3915
3916                         print format_extended_diff_header_line($patch_line, $diffinfo,
3917                                                                \%from, \%to);
3918                 }
3919                 print "</div>\n"; # class="diff extended_header"
3920
3921                 # from-file/to-file diff header
3922                 if (! $patch_line) {
3923                         print "</div>\n"; # class="patch"
3924                         last PATCH;
3925                 }
3926                 next PATCH if ($patch_line =~ m/^diff /);
3927                 #assert($patch_line =~ m/^---/) if DEBUG;
3928
3929                 my $last_patch_line = $patch_line;
3930                 $patch_line = <$fd>;
3931                 chomp $patch_line;
3932                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3933
3934                 print format_diff_from_to_header($last_patch_line, $patch_line,
3935                                                  $diffinfo, \%from, \%to,
3936                                                  @hash_parents);
3937
3938                 # the patch itself
3939         LINE:
3940                 while ($patch_line = <$fd>) {
3941                         chomp $patch_line;
3942
3943                         next PATCH if ($patch_line =~ m/^diff /);
3944
3945                         print format_diff_line($patch_line, \%from, \%to);
3946                 }
3947
3948         } continue {
3949                 print "</div>\n"; # class="patch"
3950         }
3951
3952         # for compact combined (--cc) format, with chunk and patch simpliciaction
3953         # patchset might be empty, but there might be unprocessed raw lines
3954         for (++$patch_idx if $patch_number > 0;
3955              $patch_idx < @$difftree;
3956              ++$patch_idx) {
3957                 # read and prepare patch information
3958                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3959
3960                 # generate anchor for "patch" links in difftree / whatchanged part
3961                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3962                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3963                       "</div>\n";  # class="patch"
3964
3965                 $patch_number++;
3966         }
3967
3968         if ($patch_number == 0) {
3969                 if (@hash_parents > 1) {
3970                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3971                 } else {
3972                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3973                 }
3974         }
3975
3976         print "</div>\n"; # class="patchset"
3977 }
3978
3979 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3980
3981 # fills project list info (age, description, owner, forks) for each
3982 # project in the list, removing invalid projects from returned list
3983 # NOTE: modifies $projlist, but does not remove entries from it
3984 sub fill_project_list_info {
3985         my ($projlist, $check_forks) = @_;
3986         my @projects;
3987
3988         my $show_ctags = gitweb_check_feature('ctags');
3989  PROJECT:
3990         foreach my $pr (@$projlist) {
3991                 my (@activity) = git_get_last_activity($pr->{'path'});
3992                 unless (@activity) {
3993                         next PROJECT;
3994                 }
3995                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
3996                 if (!defined $pr->{'descr'}) {
3997                         my $descr = git_get_project_description($pr->{'path'}) || "";
3998                         $descr = to_utf8($descr);
3999                         $pr->{'descr_long'} = $descr;
4000                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4001                 }
4002                 if (!defined $pr->{'owner'}) {
4003                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4004                 }
4005                 if ($check_forks) {
4006                         my $pname = $pr->{'path'};
4007                         if (($pname =~ s/\.git$//) &&
4008                             ($pname !~ /\/$/) &&
4009                             (-d "$projectroot/$pname")) {
4010                                 $pr->{'forks'} = "-d $projectroot/$pname";
4011                         } else {
4012                                 $pr->{'forks'} = 0;
4013                         }
4014                 }
4015                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4016                 push @projects, $pr;
4017         }
4018
4019         return @projects;
4020 }
4021
4022 # print 'sort by' <th> element, generating 'sort by $name' replay link
4023 # if that order is not selected
4024 sub print_sort_th {
4025         my ($name, $order, $header) = @_;
4026         $header ||= ucfirst($name);
4027
4028         if ($order eq $name) {
4029                 print "<th>$header</th>\n";
4030         } else {
4031                 print "<th>" .
4032                       $cgi->a({-href => href(-replay=>1, order=>$name),
4033                                -class => "header"}, $header) .
4034                       "</th>\n";
4035         }
4036 }
4037
4038 sub git_project_list_body {
4039         # actually uses global variable $project
4040         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4041
4042         my $check_forks = gitweb_check_feature('forks');
4043         my @projects = fill_project_list_info($projlist, $check_forks);
4044
4045         $order ||= $default_projects_order;
4046         $from = 0 unless defined $from;
4047         $to = $#projects if (!defined $to || $#projects < $to);
4048
4049         my %order_info = (
4050                 project => { key => 'path', type => 'str' },
4051                 descr => { key => 'descr_long', type => 'str' },
4052                 owner => { key => 'owner', type => 'str' },
4053                 age => { key => 'age', type => 'num' }
4054         );
4055         my $oi = $order_info{$order};
4056         if ($oi->{'type'} eq 'str') {
4057                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4058         } else {
4059                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4060         }
4061
4062         my $show_ctags = gitweb_check_feature('ctags');
4063         if ($show_ctags) {
4064                 my %ctags;
4065                 foreach my $p (@projects) {
4066                         foreach my $ct (keys %{$p->{'ctags'}}) {
4067                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4068                         }
4069                 }
4070                 my $cloud = git_populate_project_tagcloud(\%ctags);
4071                 print git_show_project_tagcloud($cloud, 64);
4072         }
4073
4074         print "<table class=\"project_list\">\n";
4075         unless ($no_header) {
4076                 print "<tr>\n";
4077                 if ($check_forks) {
4078                         print "<th></th>\n";
4079                 }
4080                 print_sort_th('project', $order, 'Project');
4081                 print_sort_th('descr', $order, 'Description');
4082                 print_sort_th('owner', $order, 'Owner');
4083                 print_sort_th('age', $order, 'Last Change');
4084                 print "<th></th>\n" . # for links
4085                       "</tr>\n";
4086         }
4087         my $alternate = 1;
4088         my $tagfilter = $cgi->param('by_tag');
4089         for (my $i = $from; $i <= $to; $i++) {
4090                 my $pr = $projects[$i];
4091
4092                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4093                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4094                         and not $pr->{'descr_long'} =~ /$searchtext/;
4095                 # Weed out forks or non-matching entries of search
4096                 if ($check_forks) {
4097                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4098                         $forkbase="^$forkbase" if $forkbase;
4099                         next if not $searchtext and not $tagfilter and $show_ctags
4100                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4101                 }
4102
4103                 if ($alternate) {
4104                         print "<tr class=\"dark\">\n";
4105                 } else {
4106                         print "<tr class=\"light\">\n";
4107                 }
4108                 $alternate ^= 1;
4109                 if ($check_forks) {
4110                         print "<td>";
4111                         if ($pr->{'forks'}) {
4112                                 print "<!-- $pr->{'forks'} -->\n";
4113                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4114                         }
4115                         print "</td>\n";
4116                 }
4117                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4118                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4119                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4120                                         -class => "list", -title => $pr->{'descr_long'}},
4121                                         esc_html($pr->{'descr'})) . "</td>\n" .
4122                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4123                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4124                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4125                       "<td class=\"link\">" .
4126                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4127                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "log") . " | " .
4128                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4129                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4130                       "</td>\n" .
4131                       "</tr>\n";
4132         }
4133         if (defined $extra) {
4134                 print "<tr>\n";
4135                 if ($check_forks) {
4136                         print "<td></td>\n";
4137                 }
4138                 print "<td colspan=\"5\">$extra</td>\n" .
4139                       "</tr>\n";
4140         }
4141         print "</table>\n";
4142 }
4143
4144 sub git_shortlog_body {
4145         # uses global variable $project
4146         my ($commitlist, $from, $to, $refs, $extra) = @_;
4147
4148         $from = 0 unless defined $from;
4149         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4150
4151         print "<table class=\"shortlog\">\n";
4152         my $alternate = 1;
4153         for (my $i = $from; $i <= $to; $i++) {
4154                 my %co = %{$commitlist->[$i]};
4155                 my $commit = $co{'id'};
4156                 my $ref = format_ref_marker($refs, $commit);
4157                 if ($alternate) {
4158                         print "<tr class=\"dark\">\n";
4159                 } else {
4160                         print "<tr class=\"light\">\n";
4161                 }
4162                 $alternate ^= 1;
4163                 my $author = chop_and_escape_str($co{'author_name'}, 10);
4164                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4165                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4166                       "<td><i>" . $author . "</i></td>\n" .
4167                       "<td>";
4168                 print format_subject_html($co{'title'}, $co{'title_short'},
4169                                           href(action=>"commit", hash=>$commit), $ref);
4170                 print "</td>\n" .
4171                       "<td class=\"link\">" .
4172                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4173                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4174                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4175                 my $snapshot_links = format_snapshot_links($commit);
4176                 if (defined $snapshot_links) {
4177                         print " | " . $snapshot_links;
4178                 }
4179                 print "</td>\n" .
4180                       "</tr>\n";
4181         }
4182         if (defined $extra) {
4183                 print "<tr>\n" .
4184                       "<td colspan=\"4\">$extra</td>\n" .
4185                       "</tr>\n";
4186         }
4187         print "</table>\n";
4188 }
4189
4190 sub git_history_body {
4191         # Warning: assumes constant type (blob or tree) during history
4192         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4193
4194         $from = 0 unless defined $from;
4195         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4196
4197         print "<table class=\"history\">\n";
4198         my $alternate = 1;
4199         for (my $i = $from; $i <= $to; $i++) {
4200                 my %co = %{$commitlist->[$i]};
4201                 if (!%co) {
4202                         next;
4203                 }
4204                 my $commit = $co{'id'};
4205
4206                 my $ref = format_ref_marker($refs, $commit);
4207
4208                 if ($alternate) {
4209                         print "<tr class=\"dark\">\n";
4210                 } else {
4211                         print "<tr class=\"light\">\n";
4212                 }
4213                 $alternate ^= 1;
4214         # shortlog uses      chop_str($co{'author_name'}, 10)
4215                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
4216                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4217                       "<td><i>" . $author . "</i></td>\n" .
4218                       "<td>";
4219                 # originally git_history used chop_str($co{'title'}, 50)
4220                 print format_subject_html($co{'title'}, $co{'title_short'},
4221                                           href(action=>"commit", hash=>$commit), $ref);
4222                 print "</td>\n" .
4223                       "<td class=\"link\">" .
4224                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4225                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4226
4227                 if ($ftype eq 'blob') {
4228                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4229                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4230                         if (defined $blob_current && defined $blob_parent &&
4231                                         $blob_current ne $blob_parent) {
4232                                 print " | " .
4233                                         $cgi->a({-href => href(action=>"blobdiff",
4234                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4235                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4236                                                                file_name=>$file_name)},
4237                                                 "diff to current");
4238                         }
4239                 }
4240                 print "</td>\n" .
4241                       "</tr>\n";
4242         }
4243         if (defined $extra) {
4244                 print "<tr>\n" .
4245                       "<td colspan=\"4\">$extra</td>\n" .
4246                       "</tr>\n";
4247         }
4248         print "</table>\n";
4249 }
4250
4251 sub git_tags_body {
4252         # uses global variable $project
4253         my ($taglist, $from, $to, $extra) = @_;
4254         $from = 0 unless defined $from;
4255         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4256
4257         print "<table class=\"tags\">\n";
4258         my $alternate = 1;
4259         for (my $i = $from; $i <= $to; $i++) {
4260                 my $entry = $taglist->[$i];
4261                 my %tag = %$entry;
4262                 my $comment = $tag{'subject'};
4263                 my $comment_short;
4264                 if (defined $comment) {
4265                         $comment_short = chop_str($comment, 30, 5);
4266                 }
4267                 if ($alternate) {
4268                         print "<tr class=\"dark\">\n";
4269                 } else {
4270                         print "<tr class=\"light\">\n";
4271                 }
4272                 $alternate ^= 1;
4273                 if (defined $tag{'age'}) {
4274                         print "<td><i>$tag{'age'}</i></td>\n";
4275                 } else {
4276                         print "<td></td>\n";
4277                 }
4278                 print "<td>" .
4279                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4280                                -class => "list name"}, esc_html($tag{'name'})) .
4281                       "</td>\n" .
4282                       "<td>";
4283                 if (defined $comment) {
4284                         print format_subject_html($comment, $comment_short,
4285                                                   href(action=>"tag", hash=>$tag{'id'}));
4286                 }
4287                 print "</td>\n" .
4288                       "<td class=\"selflink\">";
4289                 if ($tag{'type'} eq "tag") {
4290                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4291                 } else {
4292                         print "&nbsp;";
4293                 }
4294                 print "</td>\n" .
4295                       "<td class=\"link\">" . " | " .
4296                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4297                 if ($tag{'reftype'} eq "commit") {
4298                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "log");
4299                 } elsif ($tag{'reftype'} eq "blob") {
4300                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4301                 }
4302                 print "</td>\n" .
4303                       "</tr>";
4304         }
4305         if (defined $extra) {
4306                 print "<tr>\n" .
4307                       "<td colspan=\"5\">$extra</td>\n" .
4308                       "</tr>\n";
4309         }
4310         print "</table>\n";
4311 }
4312
4313 sub git_heads_body {
4314         # uses global variable $project
4315         my ($headlist, $head, $from, $to, $extra) = @_;
4316         $from = 0 unless defined $from;
4317         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4318
4319         print "<table class=\"heads\">\n";
4320         my $alternate = 1;
4321         for (my $i = $from; $i <= $to; $i++) {
4322                 my $entry = $headlist->[$i];
4323                 my %ref = %$entry;
4324                 my $curr = $ref{'id'} eq $head;
4325                 if ($alternate) {
4326                         print "<tr class=\"dark\">\n";
4327                 } else {
4328                         print "<tr class=\"light\">\n";
4329                 }
4330                 $alternate ^= 1;
4331                 print "<td><i>$ref{'age'}</i></td>\n" .
4332                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4333                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4334                                -class => "list name"},esc_html($ref{'name'})) .
4335                       "</td>\n" .
4336                       "<td class=\"link\">" .
4337                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "log") . " | " .
4338                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4339                       "</td>\n" .
4340                       "</tr>";
4341         }
4342         if (defined $extra) {
4343                 print "<tr>\n" .
4344                       "<td colspan=\"3\">$extra</td>\n" .
4345                       "</tr>\n";
4346         }
4347         print "</table>\n";
4348 }
4349
4350 sub git_search_grep_body {
4351         my ($commitlist, $from, $to, $extra) = @_;
4352         $from = 0 unless defined $from;
4353         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4354
4355         print "<table class=\"commit_search\">\n";
4356         my $alternate = 1;
4357         for (my $i = $from; $i <= $to; $i++) {
4358                 my %co = %{$commitlist->[$i]};
4359                 if (!%co) {
4360                         next;
4361                 }
4362                 my $commit = $co{'id'};
4363                 if ($alternate) {
4364                         print "<tr class=\"dark\">\n";
4365                 } else {
4366                         print "<tr class=\"light\">\n";
4367                 }
4368                 $alternate ^= 1;
4369                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
4370                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4371                       "<td><i>" . $author . "</i></td>\n" .
4372                       "<td>" .
4373                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4374                                -class => "list subject"},
4375                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4376                 my $comment = $co{'comment'};
4377                 foreach my $line (@$comment) {
4378                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4379                                 my ($lead, $match, $trail) = ($1, $2, $3);
4380                                 $match = chop_str($match, 70, 5, 'center');
4381                                 my $contextlen = int((80 - length($match))/2);
4382                                 $contextlen = 30 if ($contextlen > 30);
4383                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4384                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4385
4386                                 $lead  = esc_html($lead);
4387                                 $match = esc_html($match);
4388                                 $trail = esc_html($trail);
4389
4390                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4391                         }
4392                 }
4393                 print "</td>\n" .
4394                       "<td class=\"link\">" .
4395                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4396                       " | " .
4397                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4398                       " | " .
4399                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4400                 print "</td>\n" .
4401                       "</tr>\n";
4402         }
4403         if (defined $extra) {
4404                 print "<tr>\n" .
4405                       "<td colspan=\"3\">$extra</td>\n" .
4406                       "</tr>\n";
4407         }
4408         print "</table>\n";
4409 }
4410
4411 ## ======================================================================
4412 ## ======================================================================
4413 ## actions
4414
4415 sub git_project_list {
4416         my $order = $input_params{'order'};
4417         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4418                 die_error(400, "Unknown order parameter");
4419         }
4420
4421         my @list = git_get_projects_list();
4422         if (!@list) {
4423                 die_error(404, "No projects found");
4424         }
4425
4426         git_header_html();
4427         if (-f $home_text) {
4428                 print "<div class=\"index_include\">\n";
4429                 insert_file($home_text);
4430                 print "</div>\n";
4431         }
4432         print $cgi->startform(-method => "get") .
4433               "<p class=\"projsearch\">Search:\n" .
4434               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4435               "</p>" .
4436               $cgi->end_form() . "\n";
4437         git_project_list_body(\@list, $order);
4438         git_footer_html();
4439 }
4440
4441 sub git_forks {
4442         my $order = $input_params{'order'};
4443         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4444                 die_error(400, "Unknown order parameter");
4445         }
4446
4447         my @list = git_get_projects_list($project);
4448         if (!@list) {
4449                 die_error(404, "No forks found");
4450         }
4451
4452         git_header_html();
4453         git_print_page_nav('','');
4454         git_print_header_div('summary', "$project forks");
4455         git_project_list_body(\@list, $order);
4456         git_footer_html();
4457 }
4458
4459 sub git_project_index {
4460         my @projects = git_get_projects_list($project);
4461
4462         print $cgi->header(
4463                 -type => 'text/plain',
4464                 -charset => 'utf-8',
4465                 -content_disposition => 'inline; filename="index.aux"');
4466
4467         foreach my $pr (@projects) {
4468                 if (!exists $pr->{'owner'}) {
4469                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4470                 }
4471
4472                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4473                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4474                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4475                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4476                 $path  =~ s/ /\+/g;
4477                 $owner =~ s/ /\+/g;
4478
4479                 print "$path $owner\n";
4480         }
4481 }
4482
4483 sub git_summary {
4484         my $descr = git_get_project_description($project) || "none";
4485         my %co = parse_commit("HEAD");
4486         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4487         my $head = $co{'id'};
4488
4489         my $owner = git_get_project_owner($project);
4490
4491         my $refs = git_get_references();
4492         # These get_*_list functions return one more to allow us to see if
4493         # there are more ...
4494         my @taglist  = git_get_tags_list(16);
4495         my @headlist = git_get_heads_list(16);
4496         my @forklist;
4497         my $check_forks = gitweb_check_feature('forks');
4498
4499         if ($check_forks) {
4500                 @forklist = git_get_projects_list($project);
4501         }
4502
4503         git_header_html();
4504         git_print_page_nav('summary','', $head);
4505
4506         print "<div class=\"title\">&nbsp;</div>\n";
4507         print "<table class=\"projects_list\">\n" .
4508               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4509               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4510         if (defined $cd{'rfc2822'}) {
4511                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4512         }
4513
4514         # use per project git URL list in $projectroot/$project/cloneurl
4515         # or make project git URL from git base URL and project name
4516         my $url_tag = "URL";
4517         my @url_list = git_get_project_url_list($project);
4518         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4519         foreach my $git_url (@url_list) {
4520                 next unless $git_url;
4521                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4522                 $url_tag = "";
4523         }
4524
4525         # Tag cloud
4526         my $show_ctags = gitweb_check_feature('ctags');
4527         if ($show_ctags) {
4528                 my $ctags = git_get_project_ctags($project);
4529                 my $cloud = git_populate_project_tagcloud($ctags);
4530                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4531                 print "</td>\n<td>" unless %$ctags;
4532                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4533                 print "</td>\n<td>" if %$ctags;
4534                 print git_show_project_tagcloud($cloud, 48);
4535                 print "</td></tr>";
4536         }
4537
4538         print "</table>\n";
4539
4540         # If XSS prevention is on, we don't include README.html.
4541         # TODO: Allow a readme in some safe format.
4542         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4543                 print "<div class=\"title\">readme</div>\n" .
4544                       "<div class=\"readme\">\n";
4545                 insert_file("$projectroot/$project/README.html");
4546                 print "\n</div>\n"; # class="readme"
4547         }
4548
4549         # we need to request one more than 16 (0..15) to check if
4550         # those 16 are all
4551         my @commitlist = $head ? parse_commits($head, 17) : ();
4552         if (@commitlist) {
4553                 git_print_header_div('shortlog');
4554                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4555                                   $#commitlist <=  15 ? undef :
4556                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4557         }
4558
4559         if (@taglist) {
4560                 git_print_header_div('tags');
4561                 git_tags_body(\@taglist, 0, 15,
4562                               $#taglist <=  15 ? undef :
4563                               $cgi->a({-href => href(action=>"tags")}, "..."));
4564         }
4565
4566         if (@headlist) {
4567                 git_print_header_div('heads');
4568                 git_heads_body(\@headlist, $head, 0, 15,
4569                                $#headlist <= 15 ? undef :
4570                                $cgi->a({-href => href(action=>"heads")}, "..."));
4571         }
4572
4573         if (@forklist) {
4574                 git_print_header_div('forks');
4575                 git_project_list_body(\@forklist, 'age', 0, 15,
4576                                       $#forklist <= 15 ? undef :
4577                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4578                                       'no_header');
4579         }
4580
4581         git_footer_html();
4582 }
4583
4584 sub git_tag {
4585         my $head = git_get_head_hash($project);
4586         git_header_html();
4587         git_print_page_nav('','', $head,undef,$head);
4588         my %tag = parse_tag($hash);
4589
4590         if (! %tag) {
4591                 die_error(404, "Unknown tag object");
4592         }
4593
4594         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4595         print "<div class=\"title_text\">\n" .
4596               "<table class=\"object_header\">\n" .
4597               "<tr>\n" .
4598               "<td>object</td>\n" .
4599               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4600                                $tag{'object'}) . "</td>\n" .
4601               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4602                                               $tag{'type'}) . "</td>\n" .
4603               "</tr>\n";
4604         if (defined($tag{'author'})) {
4605                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4606                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4607                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4608                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4609                         "</td></tr>\n";
4610         }
4611         print "</table>\n\n" .
4612               "</div>\n";
4613         print "<div class=\"page_body\">";
4614         my $comment = $tag{'comment'};
4615         foreach my $line (@$comment) {
4616                 chomp $line;
4617                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4618         }
4619         print "</div>\n";
4620         git_footer_html();
4621 }
4622
4623 sub git_blame {
4624         # permissions
4625         gitweb_check_feature('blame')
4626                 or die_error(403, "Blame view not allowed");
4627
4628         # error checking
4629         die_error(400, "No file name given") unless $file_name;
4630         $hash_base ||= git_get_head_hash($project);
4631         die_error(404, "Couldn't find base commit") unless $hash_base;
4632         my %co = parse_commit($hash_base)
4633                 or die_error(404, "Commit not found");
4634         my $ftype = "blob";
4635         if (!defined $hash) {
4636                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4637                         or die_error(404, "Error looking up file");
4638         } else {
4639                 $ftype = git_get_type($hash);
4640                 if ($ftype !~ "blob") {
4641                         die_error(400, "Object is not a blob");
4642                 }
4643         }
4644
4645         # run git-blame --porcelain
4646         open my $fd, "-|", git_cmd(), "blame", '-p',
4647                 $hash_base, '--', $file_name
4648                 or die_error(500, "Open git-blame failed");
4649
4650         # page header
4651         git_header_html();
4652         my $formats_nav =
4653                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4654                         "blob") .
4655                 " | " .
4656                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4657                         "history") .
4658                 " | " .
4659                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4660                         "HEAD");
4661         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4662         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4663         git_print_page_path($file_name, $ftype, $hash_base);
4664
4665         # page body
4666         my @rev_color = qw(light2 dark2);
4667         my $num_colors = scalar(@rev_color);
4668         my $current_color = 0;
4669         my %metainfo = ();
4670
4671         print <<HTML;
4672 <div class="page_body">
4673 <table class="blame">
4674 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4675 HTML
4676  LINE:
4677         while (my $line = <$fd>) {
4678                 chomp $line;
4679                 # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
4680                 # no <lines in group> for subsequent lines in group of lines
4681                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4682                    ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
4683                 if (!exists $metainfo{$full_rev}) {
4684                         $metainfo{$full_rev} = {};
4685                 }
4686                 my $meta = $metainfo{$full_rev};
4687                 my $data;
4688                 while ($data = <$fd>) {
4689                         chomp $data;
4690                         last if ($data =~ s/^\t//); # contents of line
4691                         if ($data =~ /^(\S+) (.*)$/) {
4692                                 $meta->{$1} = $2;
4693                         }
4694                 }
4695                 my $short_rev = substr($full_rev, 0, 8);
4696                 my $author = $meta->{'author'};
4697                 my %date =
4698                         parse_date($meta->{'author-time'}, $meta->{'author-tz'});
4699                 my $date = $date{'iso-tz'};
4700                 if ($group_size) {
4701                         $current_color = ($current_color + 1) % $num_colors;
4702                 }
4703                 print "<tr id=\"l$lineno\" class=\"$rev_color[$current_color]\">\n";
4704                 if ($group_size) {
4705                         print "<td class=\"sha1\"";
4706                         print " title=\"". esc_html($author) . ", $date\"";
4707                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4708                         print ">";
4709                         print $cgi->a({-href => href(action=>"commit",
4710                                                      hash=>$full_rev,
4711                                                      file_name=>$file_name)},
4712                                       esc_html($short_rev));
4713                         print "</td>\n";
4714                 }
4715                 my $parent_commit;
4716                 if (!exists $meta->{'parent'}) {
4717                         open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4718                                 or die_error(500, "Open git-rev-parse failed");
4719                         $parent_commit = <$dd>;
4720                         close $dd;
4721                         chomp($parent_commit);
4722                         $meta->{'parent'} = $parent_commit;
4723                 } else {
4724                         $parent_commit = $meta->{'parent'};
4725                 }
4726                 my $blamed = href(action => 'blame',
4727                                   file_name => $meta->{'filename'},
4728                                   hash_base => $parent_commit);
4729                 print "<td class=\"linenr\">";
4730                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4731                                 -class => "linenr" },
4732                               esc_html($lineno));
4733                 print "</td>";
4734                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4735                 print "</tr>\n";
4736         }
4737         print "</table>\n";
4738         print "</div>";
4739         close $fd
4740                 or print "Reading blob failed\n";
4741
4742         # page footer
4743         git_footer_html();
4744 }
4745
4746 sub git_tags {
4747         my $head = git_get_head_hash($project);
4748         git_header_html();
4749         git_print_page_nav('','', $head,undef,$head);
4750         git_print_header_div('summary', $project);
4751
4752         my @tagslist = git_get_tags_list();
4753         if (@tagslist) {
4754                 git_tags_body(\@tagslist);
4755         }
4756         git_footer_html();
4757 }
4758
4759 sub git_heads {
4760         my $head = git_get_head_hash($project);
4761         git_header_html();
4762         git_print_page_nav('','', $head,undef,$head);
4763         git_print_header_div('summary', $project);
4764
4765         my @headslist = git_get_heads_list();
4766         if (@headslist) {
4767                 git_heads_body(\@headslist, $head);
4768         }
4769         git_footer_html();
4770 }
4771
4772 sub git_blob_plain {
4773         my $type = shift;
4774         my $expires;
4775
4776         if (!defined $hash) {
4777                 if (defined $file_name) {
4778                         my $base = $hash_base || git_get_head_hash($project);
4779                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4780                                 or die_error(404, "Cannot find file");
4781                 } else {
4782                         die_error(400, "No file name defined");
4783                 }
4784         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4785                 # blobs defined by non-textual hash id's can be cached
4786                 $expires = "+1d";
4787         }
4788
4789         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4790                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4791
4792         # content-type (can include charset)
4793         $type = blob_contenttype($fd, $file_name, $type);
4794
4795         # "save as" filename, even when no $file_name is given
4796         my $save_as = "$hash";
4797         if (defined $file_name) {
4798                 $save_as = $file_name;
4799         } elsif ($type =~ m/^text\//) {
4800                 $save_as .= '.txt';
4801         }
4802
4803         # With XSS prevention on, blobs of all types except a few known safe
4804         # ones are served with "Content-Disposition: attachment" to make sure
4805         # they don't run in our security domain.  For certain image types,
4806         # blob view writes an <img> tag referring to blob_plain view, and we
4807         # want to be sure not to break that by serving the image as an
4808         # attachment (though Firefox 3 doesn't seem to care).
4809         my $sandbox = $prevent_xss &&
4810                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
4811
4812         print $cgi->header(
4813                 -type => $type,
4814                 -expires => $expires,
4815                 -content_disposition =>
4816                         ($sandbox ? 'attachment' : 'inline')
4817                         . '; filename="' . $save_as . '"');
4818         local $/ = undef;
4819         binmode STDOUT, ':raw';
4820         print <$fd>;
4821         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4822         close $fd;
4823 }
4824
4825 sub git_blob {
4826         my $expires;
4827
4828         if (!defined $hash) {
4829                 if (defined $file_name) {
4830                         my $base = $hash_base || git_get_head_hash($project);
4831                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4832                                 or die_error(404, "Cannot find file");
4833                 } else {
4834                         die_error(400, "No file name defined");
4835                 }
4836         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4837                 # blobs defined by non-textual hash id's can be cached
4838                 $expires = "+1d";
4839         }
4840
4841         my $have_blame = gitweb_check_feature('blame');
4842         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4843                 or die_error(500, "Couldn't cat $file_name, $hash");
4844         my $mimetype = blob_mimetype($fd, $file_name);
4845         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4846                 close $fd;
4847                 return git_blob_plain($mimetype);
4848         }
4849         # we can have blame only for text/* mimetype
4850         $have_blame &&= ($mimetype =~ m!^text/!);
4851
4852         git_header_html(undef, $expires);
4853         my $formats_nav = '';
4854         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4855                 if (defined $file_name) {
4856                         if ($have_blame) {
4857                                 $formats_nav .=
4858                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4859                                                 "blame") .
4860                                         " | ";
4861                         }
4862                         $formats_nav .=
4863                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4864                                         "history") .
4865                                 " | " .
4866                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4867                                         "raw") .
4868                                 " | " .
4869                                 $cgi->a({-href => href(action=>"blob",
4870                                                        hash_base=>"HEAD", file_name=>$file_name)},
4871                                         "HEAD");
4872                 } else {
4873                         $formats_nav .=
4874                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4875                                         "raw");
4876                 }
4877                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4878                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4879         } else {
4880                 print "<div class=\"page_nav\">\n" .
4881                       "<br/><br/></div>\n" .
4882                       "<div class=\"title\">$hash</div>\n";
4883         }
4884         git_print_page_path($file_name, "blob", $hash_base);
4885         print "<div class=\"page_body\">\n";
4886         if ($mimetype =~ m!^image/!) {
4887                 print qq!<img type="$mimetype"!;
4888                 if ($file_name) {
4889                         print qq! alt="$file_name" title="$file_name"!;
4890                 }
4891                 print qq! src="! .
4892                       href(action=>"blob_plain", hash=>$hash,
4893                            hash_base=>$hash_base, file_name=>$file_name) .
4894                       qq!" />\n!;
4895         } else {
4896                 my $nr;
4897                 while (my $line = <$fd>) {
4898                         chomp $line;
4899                         $nr++;
4900                         $line = untabify($line);
4901                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4902                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4903                 }
4904         }
4905         close $fd
4906                 or print "Reading blob failed.\n";
4907         print "</div>";
4908         git_footer_html();
4909 }
4910
4911 sub git_tree {
4912         if (!defined $hash_base) {
4913                 $hash_base = "HEAD";
4914         }
4915         if (!defined $hash) {
4916                 if (defined $file_name) {
4917                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4918                 } else {
4919                         $hash = $hash_base;
4920                 }
4921         }
4922         die_error(404, "No such tree") unless defined($hash);
4923
4924         my @entries = ();
4925         {
4926                 local $/ = "\0";
4927                 open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4928                         or die_error(500, "Open git-ls-tree failed");
4929                 @entries = map { chomp; $_ } <$fd>;
4930                 close $fd
4931                         or die_error(404, "Reading tree failed");
4932         }
4933
4934         my $refs = git_get_references();
4935         my $ref = format_ref_marker($refs, $hash_base);
4936         git_header_html();
4937         my $basedir = '';
4938         my $have_blame = gitweb_check_feature('blame');
4939         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4940                 my @views_nav = ();
4941                 if (defined $file_name) {
4942                         push @views_nav,
4943                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4944                                         "history"),
4945                                 $cgi->a({-href => href(action=>"tree",
4946                                                        hash_base=>"HEAD", file_name=>$file_name)},
4947                                         "HEAD"),
4948                 }
4949                 my $snapshot_links = format_snapshot_links($hash);
4950                 if (defined $snapshot_links) {
4951                         # FIXME: Should be available when we have no hash base as well.
4952                         push @views_nav, $snapshot_links;
4953                 }
4954                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4955                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4956         } else {
4957                 undef $hash_base;
4958                 print "<div class=\"page_nav\">\n";
4959                 print "<br/><br/></div>\n";
4960                 print "<div class=\"title\">$hash</div>\n";
4961         }
4962         if (defined $file_name) {
4963                 $basedir = $file_name;
4964                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4965                         $basedir .= '/';
4966                 }
4967                 git_print_page_path($file_name, 'tree', $hash_base);
4968         }
4969         print "<div class=\"page_body\">\n";
4970         print "<table class=\"tree\">\n";
4971         my $alternate = 1;
4972         # '..' (top directory) link if possible
4973         if (defined $hash_base &&
4974             defined $file_name && $file_name =~ m![^/]+$!) {
4975                 if ($alternate) {
4976                         print "<tr class=\"dark\">\n";
4977                 } else {
4978                         print "<tr class=\"light\">\n";
4979                 }
4980                 $alternate ^= 1;
4981
4982                 my $up = $file_name;
4983                 $up =~ s!/?[^/]+$!!;
4984                 undef $up unless $up;
4985                 # based on git_print_tree_entry
4986                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4987                 print '<td class="list">';
4988                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4989                                              file_name=>$up)},
4990                               "..");
4991                 print "</td>\n";
4992                 print "<td class=\"link\"></td>\n";
4993
4994                 print "</tr>\n";
4995         }
4996         foreach my $line (@entries) {
4997                 my %t = parse_ls_tree_line($line, -z => 1);
4998
4999                 if ($alternate) {
5000                         print "<tr class=\"dark\">\n";
5001                 } else {
5002                         print "<tr class=\"light\">\n";
5003                 }
5004                 $alternate ^= 1;
5005
5006                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5007
5008                 print "</tr>\n";
5009         }
5010         print "</table>\n" .
5011               "</div>";
5012         git_footer_html();
5013 }
5014
5015 sub git_snapshot {
5016         my $format = $input_params{'snapshot_format'};
5017         if (!@snapshot_fmts) {
5018                 die_error(403, "Snapshots not allowed");
5019         }
5020         # default to first supported snapshot format
5021         $format ||= $snapshot_fmts[0];
5022         if ($format !~ m/^[a-z0-9]+$/) {
5023                 die_error(400, "Invalid snapshot format parameter");
5024         } elsif (!exists($known_snapshot_formats{$format})) {
5025                 die_error(400, "Unknown snapshot format");
5026         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5027                 die_error(403, "Unsupported snapshot format");
5028         }
5029
5030         if (!defined $hash) {
5031                 $hash = git_get_head_hash($project);
5032         }
5033
5034         my $name = $project;
5035         $name =~ s,([^/])/*\.git$,$1,;
5036         $name = basename($name);
5037         my $filename = to_utf8($name);
5038         $name =~ s/\047/\047\\\047\047/g;
5039         my $cmd;
5040         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
5041         $cmd = quote_command(
5042                 git_cmd(), 'archive',
5043                 "--format=$known_snapshot_formats{$format}{'format'}",
5044                 "--prefix=$name/", $hash);
5045         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5046                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5047         }
5048
5049         print $cgi->header(
5050                 -type => $known_snapshot_formats{$format}{'type'},
5051                 -content_disposition => 'inline; filename="' . "$filename" . '"',
5052                 -status => '200 OK');
5053
5054         open my $fd, "-|", $cmd
5055                 or die_error(500, "Execute git-archive failed");
5056         binmode STDOUT, ':raw';
5057         print <$fd>;
5058         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5059         close $fd;
5060 }
5061
5062 sub git_log {
5063         my $head = git_get_head_hash($project);
5064         if (!defined $hash) {
5065                 $hash = $head;
5066         }
5067         if (!defined $page) {
5068                 $page = 0;
5069         }
5070         my $refs = git_get_references();
5071
5072         my @commitlist = parse_commits($hash, 101, (100 * $page));
5073
5074         my $paging_nav = format_log_nav('log', $hash, $head, $page, $#commitlist >= 100);
5075
5076         {
5077                 local $action = 'fulllog';
5078                 git_header_html();
5079         }
5080         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5081
5082         if (!@commitlist) {
5083                 my %co = parse_commit($hash);
5084
5085                 git_print_header_div('summary', $project);
5086                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5087         }
5088         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5089         for (my $i = 0; $i <= $to; $i++) {
5090                 my %co = %{$commitlist[$i]};
5091                 next if !%co;
5092                 my $commit = $co{'id'};
5093                 my $ref = format_ref_marker($refs, $commit);
5094                 my %ad = parse_date($co{'author_epoch'});
5095                 git_print_header_div('commit',
5096                                "<span class=\"age\">$co{'age_string'}</span>" .
5097                                esc_html($co{'title'}) . $ref,
5098                                $commit);
5099                 print "<div class=\"title_text\">\n" .
5100                       "<div class=\"log_link\">\n" .
5101                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5102                       " | " .
5103                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5104                       " | " .
5105                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5106                       "<br/>\n" .
5107                       "</div>\n" .
5108                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
5109                       "</div>\n";
5110
5111                 print "<div class=\"log_body\">\n";
5112                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5113                 print "</div>\n";
5114         }
5115         if ($#commitlist >= 100) {
5116                 print "<div class=\"page_nav\">\n";
5117                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5118                                -accesskey => "n", -title => "Alt-n"}, "next");
5119                 print "</div>\n";
5120         }
5121         git_footer_html();
5122 }
5123
5124 sub git_commit {
5125         $hash ||= $hash_base || "HEAD";
5126         my %co = parse_commit($hash)
5127             or die_error(404, "Unknown commit object");
5128         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5129         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
5130
5131         my $parent  = $co{'parent'};
5132         my $parents = $co{'parents'}; # listref
5133
5134         # we need to prepare $formats_nav before any parameter munging
5135         my $formats_nav;
5136         if (!defined $parent) {
5137                 # --root commitdiff
5138                 $formats_nav .= '(initial)';
5139         } elsif (@$parents == 1) {
5140                 # single parent commit
5141                 $formats_nav .=
5142                         '(parent: ' .
5143                         $cgi->a({-href => href(action=>"commit",
5144                                                hash=>$parent)},
5145                                 esc_html(substr($parent, 0, 7))) .
5146                         ')';
5147         } else {
5148                 # merge commit
5149                 $formats_nav .=
5150                         '(merge: ' .
5151                         join(' ', map {
5152                                 $cgi->a({-href => href(action=>"commit",
5153                                                        hash=>$_)},
5154                                         esc_html(substr($_, 0, 7)));
5155                         } @$parents ) .
5156                         ')';
5157         }
5158         if (gitweb_check_feature('patches')) {
5159                 $formats_nav .= " | " .
5160                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5161                                 "patch");
5162         }
5163
5164         if (!defined $parent) {
5165                 $parent = "--root";
5166         }
5167         my @difftree;
5168         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5169                 @diff_opts,
5170                 (@$parents <= 1 ? $parent : '-c'),
5171                 $hash, "--"
5172                 or die_error(500, "Open git-diff-tree failed");
5173         @difftree = map { chomp; $_ } <$fd>;
5174         close $fd or die_error(404, "Reading git-diff-tree failed");
5175
5176         # non-textual hash id's can be cached
5177         my $expires;
5178         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5179                 $expires = "+1d";
5180         }
5181         my $refs = git_get_references();
5182         my $ref = format_ref_marker($refs, $co{'id'});
5183
5184         git_header_html(undef, $expires);
5185         git_print_page_nav('commit', '',
5186                            $hash, $co{'tree'}, $hash,
5187                            $formats_nav);
5188
5189         if (defined $co{'parent'}) {
5190                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5191         } else {
5192                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5193         }
5194         print "<div class=\"title_text\">\n" .
5195               "<table class=\"object_header\">\n";
5196         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
5197               "<tr>" .
5198               "<td></td><td> $ad{'rfc2822'}";
5199         if ($ad{'hour_local'} < 6) {
5200                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
5201                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5202         } else {
5203                 printf(" (%02d:%02d %s)",
5204                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5205         }
5206         print "</td>" .
5207               "</tr>\n";
5208         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
5209         print "<tr><td></td><td> $cd{'rfc2822'}" .
5210               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
5211               "</td></tr>\n";
5212         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5213         print "<tr>" .
5214               "<td>tree</td>" .
5215               "<td class=\"sha1\">" .
5216               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5217                        class => "list"}, $co{'tree'}) .
5218               "</td>" .
5219               "<td class=\"link\">" .
5220               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5221                       "tree");
5222         my $snapshot_links = format_snapshot_links($hash);
5223         if (defined $snapshot_links) {
5224                 print " | " . $snapshot_links;
5225         }
5226         print "</td>" .
5227               "</tr>\n";
5228
5229         foreach my $par (@$parents) {
5230                 print "<tr>" .
5231                       "<td>parent</td>" .
5232                       "<td class=\"sha1\">" .
5233                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5234                                class => "list"}, $par) .
5235                       "</td>" .
5236                       "<td class=\"link\">" .
5237                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5238                       " | " .
5239                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5240                       "</td>" .
5241                       "</tr>\n";
5242         }
5243         print "</table>".
5244               "</div>\n";
5245
5246         print "<div class=\"page_body\">\n";
5247         git_print_log($co{'comment'});
5248         print "</div>\n";
5249
5250         git_difftree_body(\@difftree, $hash, @$parents);
5251
5252         git_footer_html();
5253 }
5254
5255 sub git_object {
5256         # object is defined by:
5257         # - hash or hash_base alone
5258         # - hash_base and file_name
5259         my $type;
5260
5261         # - hash or hash_base alone
5262         if ($hash || ($hash_base && !defined $file_name)) {
5263                 my $object_id = $hash || $hash_base;
5264
5265                 open my $fd, "-|", quote_command(
5266                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5267                         or die_error(404, "Object does not exist");
5268                 $type = <$fd>;
5269                 chomp $type;
5270                 close $fd
5271                         or die_error(404, "Object does not exist");
5272
5273         # - hash_base and file_name
5274         } elsif ($hash_base && defined $file_name) {
5275                 $file_name =~ s,/+$,,;
5276
5277                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5278                         or die_error(404, "Base object does not exist");
5279
5280                 # here errors should not hapen
5281                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5282                         or die_error(500, "Open git-ls-tree failed");
5283                 my $line = <$fd>;
5284                 close $fd;
5285
5286                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5287                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5288                         die_error(404, "File or directory for given base does not exist");
5289                 }
5290                 $type = $2;
5291                 $hash = $3;
5292         } else {
5293                 die_error(400, "Not enough information to find object");
5294         }
5295
5296         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5297                                           hash=>$hash, hash_base=>$hash_base,
5298                                           file_name=>$file_name),
5299                              -status => '302 Found');
5300 }
5301
5302 sub git_blobdiff {
5303         my $format = shift || 'html';
5304
5305         my $fd;
5306         my @difftree;
5307         my %diffinfo;
5308         my $expires;
5309
5310         # preparing $fd and %diffinfo for git_patchset_body
5311         # new style URI
5312         if (defined $hash_base && defined $hash_parent_base) {
5313                 if (defined $file_name) {
5314                         # read raw output
5315                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5316                                 $hash_parent_base, $hash_base,
5317                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5318                                 or die_error(500, "Open git-diff-tree failed");
5319                         @difftree = map { chomp; $_ } <$fd>;
5320                         close $fd
5321                                 or die_error(404, "Reading git-diff-tree failed");
5322                         @difftree
5323                                 or die_error(404, "Blob diff not found");
5324
5325                 } elsif (defined $hash &&
5326                          $hash =~ /[0-9a-fA-F]{40}/) {
5327                         # try to find filename from $hash
5328
5329                         # read filtered raw output
5330                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5331                                 $hash_parent_base, $hash_base, "--"
5332                                 or die_error(500, "Open git-diff-tree failed");
5333                         @difftree =
5334                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5335                                 # $hash == to_id
5336                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5337                                 map { chomp; $_ } <$fd>;
5338                         close $fd
5339                                 or die_error(404, "Reading git-diff-tree failed");
5340                         @difftree
5341                                 or die_error(404, "Blob diff not found");
5342
5343                 } else {
5344                         die_error(400, "Missing one of the blob diff parameters");
5345                 }
5346
5347                 if (@difftree > 1) {
5348                         die_error(400, "Ambiguous blob diff specification");
5349                 }
5350
5351                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5352                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5353                 $file_name   ||= $diffinfo{'to_file'};
5354
5355                 $hash_parent ||= $diffinfo{'from_id'};
5356                 $hash        ||= $diffinfo{'to_id'};
5357
5358                 # non-textual hash id's can be cached
5359                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5360                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5361                         $expires = '+1d';
5362                 }
5363
5364                 # open patch output
5365                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5366                         '-p', ($format eq 'html' ? "--full-index" : ()),
5367                         $hash_parent_base, $hash_base,
5368                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5369                         or die_error(500, "Open git-diff-tree failed");
5370         }
5371
5372         # old/legacy style URI -- not generated anymore since 1.4.3.
5373         if (!%diffinfo) {
5374                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5375         }
5376
5377         # header
5378         if ($format eq 'html') {
5379                 my $formats_nav =
5380                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5381                                 "raw");
5382                 git_header_html(undef, $expires);
5383                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5384                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5385                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5386                 } else {
5387                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5388                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5389                 }
5390                 if (defined $file_name) {
5391                         git_print_page_path($file_name, "blob", $hash_base);
5392                 } else {
5393                         print "<div class=\"page_path\"></div>\n";
5394                 }
5395
5396         } elsif ($format eq 'plain') {
5397                 print $cgi->header(
5398                         -type => 'text/plain',
5399                         -charset => 'utf-8',
5400                         -expires => $expires,
5401                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5402
5403                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5404
5405         } else {
5406                 die_error(400, "Unknown blobdiff format");
5407         }
5408
5409         # patch
5410         if ($format eq 'html') {
5411                 print "<div class=\"page_body\">\n";
5412
5413                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5414                 close $fd;
5415
5416                 print "</div>\n"; # class="page_body"
5417                 git_footer_html();
5418
5419         } else {
5420                 while (my $line = <$fd>) {
5421                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5422                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5423
5424                         print $line;
5425
5426                         last if $line =~ m!^\+\+\+!;
5427                 }
5428                 local $/ = undef;
5429                 print <$fd>;
5430                 close $fd;
5431         }
5432 }
5433
5434 sub git_blobdiff_plain {
5435         git_blobdiff('plain');
5436 }
5437
5438 sub git_commitdiff {
5439         my %params = @_;
5440         my $format = $params{-format} || 'html';
5441
5442         my ($patch_max) = gitweb_get_feature('patches');
5443         if ($format eq 'patch') {
5444                 die_error(403, "Patch view not allowed") unless $patch_max;
5445         }
5446
5447         $hash ||= $hash_base || "HEAD";
5448         my %co = parse_commit($hash)
5449             or die_error(404, "Unknown commit object");
5450
5451         # choose format for commitdiff for merge
5452         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5453                 $hash_parent = '--cc';
5454         }
5455         # we need to prepare $formats_nav before almost any parameter munging
5456         my $formats_nav;
5457         if ($format eq 'html') {
5458                 $formats_nav =
5459                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5460                                 "raw");
5461                 if ($patch_max) {
5462                         $formats_nav .= " | " .
5463                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5464                                         "patch");
5465                 }
5466
5467                 if (defined $hash_parent &&
5468                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5469                         # commitdiff with two commits given
5470                         my $hash_parent_short = $hash_parent;
5471                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5472                                 $hash_parent_short = substr($hash_parent, 0, 7);
5473                         }
5474                         $formats_nav .=
5475                                 ' (from';
5476                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5477                                 if ($co{'parents'}[$i] eq $hash_parent) {
5478                                         $formats_nav .= ' parent ' . ($i+1);
5479                                         last;
5480                                 }
5481                         }
5482                         $formats_nav .= ': ' .
5483                                 $cgi->a({-href => href(action=>"commitdiff",
5484                                                        hash=>$hash_parent)},
5485                                         esc_html($hash_parent_short)) .
5486                                 ')';
5487                 } elsif (!$co{'parent'}) {
5488                         # --root commitdiff
5489                         $formats_nav .= ' (initial)';
5490                 } elsif (scalar @{$co{'parents'}} == 1) {
5491                         # single parent commit
5492                         $formats_nav .=
5493                                 ' (parent: ' .
5494                                 $cgi->a({-href => href(action=>"commitdiff",
5495                                                        hash=>$co{'parent'})},
5496                                         esc_html(substr($co{'parent'}, 0, 7))) .
5497                                 ')';
5498                 } else {
5499                         # merge commit
5500                         if ($hash_parent eq '--cc') {
5501                                 $formats_nav .= ' | ' .
5502                                         $cgi->a({-href => href(action=>"commitdiff",
5503                                                                hash=>$hash, hash_parent=>'-c')},
5504                                                 'combined');
5505                         } else { # $hash_parent eq '-c'
5506                                 $formats_nav .= ' | ' .
5507                                         $cgi->a({-href => href(action=>"commitdiff",
5508                                                                hash=>$hash, hash_parent=>'--cc')},
5509                                                 'compact');
5510                         }
5511                         $formats_nav .=
5512                                 ' (merge: ' .
5513                                 join(' ', map {
5514                                         $cgi->a({-href => href(action=>"commitdiff",
5515                                                                hash=>$_)},
5516                                                 esc_html(substr($_, 0, 7)));
5517                                 } @{$co{'parents'}} ) .
5518                                 ')';
5519                 }
5520         }
5521
5522         my $hash_parent_param = $hash_parent;
5523         if (!defined $hash_parent_param) {
5524                 # --cc for multiple parents, --root for parentless
5525                 $hash_parent_param =
5526                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5527         }
5528
5529         # read commitdiff
5530         my $fd;
5531         my @difftree;
5532         if ($format eq 'html') {
5533                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5534                         "--no-commit-id", "--patch-with-raw", "--full-index",
5535                         $hash_parent_param, $hash, "--"
5536                         or die_error(500, "Open git-diff-tree failed");
5537
5538                 while (my $line = <$fd>) {
5539                         chomp $line;
5540                         # empty line ends raw part of diff-tree output
5541                         last unless $line;
5542                         push @difftree, scalar parse_difftree_raw_line($line);
5543                 }
5544
5545         } elsif ($format eq 'plain') {
5546                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5547                         '-p', $hash_parent_param, $hash, "--"
5548                         or die_error(500, "Open git-diff-tree failed");
5549         } elsif ($format eq 'patch') {
5550                 # For commit ranges, we limit the output to the number of
5551                 # patches specified in the 'patches' feature.
5552                 # For single commits, we limit the output to a single patch,
5553                 # diverging from the git-format-patch default.
5554                 my @commit_spec = ();
5555                 if ($hash_parent) {
5556                         if ($patch_max > 0) {
5557                                 push @commit_spec, "-$patch_max";
5558                         }
5559                         push @commit_spec, '-n', "$hash_parent..$hash";
5560                 } else {
5561                         if ($params{-single}) {
5562                                 push @commit_spec, '-1';
5563                         } else {
5564                                 if ($patch_max > 0) {
5565                                         push @commit_spec, "-$patch_max";
5566                                 }
5567                                 push @commit_spec, "-n";
5568                         }
5569                         push @commit_spec, '--root', $hash;
5570                 }
5571                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5572                         '--stdout', @commit_spec
5573                         or die_error(500, "Open git-format-patch failed");
5574         } else {
5575                 die_error(400, "Unknown commitdiff format");
5576         }
5577
5578         # non-textual hash id's can be cached
5579         my $expires;
5580         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5581                 $expires = "+1d";
5582         }
5583
5584         # write commit message
5585         if ($format eq 'html') {
5586                 my $refs = git_get_references();
5587                 my $ref = format_ref_marker($refs, $co{'id'});
5588
5589                 git_header_html(undef, $expires);
5590                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5591                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5592                 git_print_authorship(\%co);
5593                 print "<div class=\"page_body\">\n";
5594                 if (@{$co{'comment'}} > 1) {
5595                         print "<div class=\"log\">\n";
5596                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5597                         print "</div>\n"; # class="log"
5598                 }
5599
5600         } elsif ($format eq 'plain') {
5601                 my $refs = git_get_references("tags");
5602                 my $tagname = git_get_rev_name_tags($hash);
5603                 my $filename = basename($project) . "-$hash.patch";
5604
5605                 print $cgi->header(
5606                         -type => 'text/plain',
5607                         -charset => 'utf-8',
5608                         -expires => $expires,
5609                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5610                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5611                 print "From: " . to_utf8($co{'author'}) . "\n";
5612                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5613                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5614
5615                 print "X-Git-Tag: $tagname\n" if $tagname;
5616                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5617
5618                 foreach my $line (@{$co{'comment'}}) {
5619                         print to_utf8($line) . "\n";
5620                 }
5621                 print "---\n\n";
5622         } elsif ($format eq 'patch') {
5623                 my $filename = basename($project) . "-$hash.patch";
5624
5625                 print $cgi->header(
5626                         -type => 'text/plain',
5627                         -charset => 'utf-8',
5628                         -expires => $expires,
5629                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5630         }
5631
5632         # write patch
5633         if ($format eq 'html') {
5634                 my $use_parents = !defined $hash_parent ||
5635                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5636                 git_difftree_body(\@difftree, $hash,
5637                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5638                 print "<br/>\n";
5639
5640                 git_patchset_body($fd, \@difftree, $hash,
5641                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5642                 close $fd;
5643                 print "</div>\n"; # class="page_body"
5644                 git_footer_html();
5645
5646         } elsif ($format eq 'plain') {
5647                 local $/ = undef;
5648                 print <$fd>;
5649                 close $fd
5650                         or print "Reading git-diff-tree failed\n";
5651         } elsif ($format eq 'patch') {
5652                 local $/ = undef;
5653                 print <$fd>;
5654                 close $fd
5655                         or print "Reading git-format-patch failed\n";
5656         }
5657 }
5658
5659 sub git_commitdiff_plain {
5660         git_commitdiff(-format => 'plain');
5661 }
5662
5663 # format-patch-style patches
5664 sub git_patch {
5665         git_commitdiff(-format => 'patch', -single=> 1);
5666 }
5667
5668 sub git_patches {
5669         git_commitdiff(-format => 'patch');
5670 }
5671
5672 sub git_history {
5673         if (!defined $hash_base) {
5674                 $hash_base = git_get_head_hash($project);
5675         }
5676         if (!defined $page) {
5677                 $page = 0;
5678         }
5679         my $ftype;
5680         my %co = parse_commit($hash_base)
5681             or die_error(404, "Unknown commit object");
5682
5683         my $refs = git_get_references();
5684         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5685
5686         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5687                                        $file_name, "--full-history")
5688             or die_error(404, "No such file or directory on given branch");
5689
5690         if (!defined $hash && defined $file_name) {
5691                 # some commits could have deleted file in question,
5692                 # and not have it in tree, but one of them has to have it
5693                 for (my $i = 0; $i <= @commitlist; $i++) {
5694                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5695                         last if defined $hash;
5696                 }
5697         }
5698         if (defined $hash) {
5699                 $ftype = git_get_type($hash);
5700         }
5701         if (!defined $ftype) {
5702                 die_error(500, "Unknown type of object");
5703         }
5704
5705         my $paging_nav = '';
5706         if ($page > 0) {
5707                 $paging_nav .=
5708                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5709                                                file_name=>$file_name)},
5710                                 "first");
5711                 $paging_nav .= " &sdot; " .
5712                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5713                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5714         } else {
5715                 $paging_nav .= "first";
5716                 $paging_nav .= " &sdot; prev";
5717         }
5718         my $next_link = '';
5719         if ($#commitlist >= 100) {
5720                 $next_link =
5721                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5722                                  -accesskey => "n", -title => "Alt-n"}, "next");
5723                 $paging_nav .= " &sdot; $next_link";
5724         } else {
5725                 $paging_nav .= " &sdot; next";
5726         }
5727
5728         git_header_html();
5729         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5730         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5731         git_print_page_path($file_name, $ftype, $hash_base);
5732
5733         git_history_body(\@commitlist, 0, 99,
5734                          $refs, $hash_base, $ftype, $next_link);
5735
5736         git_footer_html();
5737 }
5738
5739 sub git_search {
5740         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5741         if (!defined $searchtext) {
5742                 die_error(400, "Text field is empty");
5743         }
5744         if (!defined $hash) {
5745                 $hash = git_get_head_hash($project);
5746         }
5747         my %co = parse_commit($hash);
5748         if (!%co) {
5749                 die_error(404, "Unknown commit object");
5750         }
5751         if (!defined $page) {
5752                 $page = 0;
5753         }
5754
5755         $searchtype ||= 'commit';
5756         if ($searchtype eq 'pickaxe') {
5757                 # pickaxe may take all resources of your box and run for several minutes
5758                 # with every query - so decide by yourself how public you make this feature
5759                 gitweb_check_feature('pickaxe')
5760                     or die_error(403, "Pickaxe is disabled");
5761         }
5762         if ($searchtype eq 'grep') {
5763                 gitweb_check_feature('grep')
5764                     or die_error(403, "Grep is disabled");
5765         }
5766
5767         git_header_html();
5768
5769         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5770                 my $greptype;
5771                 if ($searchtype eq 'commit') {
5772                         $greptype = "--grep=";
5773                 } elsif ($searchtype eq 'author') {
5774                         $greptype = "--author=";
5775                 } elsif ($searchtype eq 'committer') {
5776                         $greptype = "--committer=";
5777                 }
5778                 $greptype .= $searchtext;
5779                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5780                                                $greptype, '--regexp-ignore-case',
5781                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5782
5783                 my $paging_nav = '';
5784                 if ($page > 0) {
5785                         $paging_nav .=
5786                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5787                                                        searchtext=>$searchtext,
5788                                                        searchtype=>$searchtype)},
5789                                         "first");
5790                         $paging_nav .= " &sdot; " .
5791                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5792                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5793                 } else {
5794                         $paging_nav .= "first";
5795                         $paging_nav .= " &sdot; prev";
5796                 }
5797                 my $next_link = '';
5798                 if ($#commitlist >= 100) {
5799                         $next_link =
5800                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5801                                          -accesskey => "n", -title => "Alt-n"}, "next");
5802                         $paging_nav .= " &sdot; $next_link";
5803                 } else {
5804                         $paging_nav .= " &sdot; next";
5805                 }
5806
5807                 if ($#commitlist >= 100) {
5808                 }
5809
5810                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5811                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5812                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5813         }
5814
5815         if ($searchtype eq 'pickaxe') {
5816                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5817                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5818
5819                 print "<table class=\"pickaxe search\">\n";
5820                 my $alternate = 1;
5821                 local $/ = "\n";
5822                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5823                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5824                         ($search_use_regexp ? '--pickaxe-regex' : ());
5825                 undef %co;
5826                 my @files;
5827                 while (my $line = <$fd>) {
5828                         chomp $line;
5829                         next unless $line;
5830
5831                         my %set = parse_difftree_raw_line($line);
5832                         if (defined $set{'commit'}) {
5833                                 # finish previous commit
5834                                 if (%co) {
5835                                         print "</td>\n" .
5836                                               "<td class=\"link\">" .
5837                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5838                                               " | " .
5839                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5840                                         print "</td>\n" .
5841                                               "</tr>\n";
5842                                 }
5843
5844                                 if ($alternate) {
5845                                         print "<tr class=\"dark\">\n";
5846                                 } else {
5847                                         print "<tr class=\"light\">\n";
5848                                 }
5849                                 $alternate ^= 1;
5850                                 %co = parse_commit($set{'commit'});
5851                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5852                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5853                                       "<td><i>$author</i></td>\n" .
5854                                       "<td>" .
5855                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5856                                               -class => "list subject"},
5857                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5858                         } elsif (defined $set{'to_id'}) {
5859                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5860
5861                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5862                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5863                                               -class => "list"},
5864                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5865                                       "<br/>\n";
5866                         }
5867                 }
5868                 close $fd;
5869
5870                 # finish last commit (warning: repetition!)
5871                 if (%co) {
5872                         print "</td>\n" .
5873                               "<td class=\"link\">" .
5874                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5875                               " | " .
5876                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5877                         print "</td>\n" .
5878                               "</tr>\n";
5879                 }
5880
5881                 print "</table>\n";
5882         }
5883
5884         if ($searchtype eq 'grep') {
5885                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5886                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5887
5888                 print "<table class=\"grep_search\">\n";
5889                 my $alternate = 1;
5890                 my $matches = 0;
5891                 local $/ = "\n";
5892                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5893                         $search_use_regexp ? ('-E', '-i') : '-F',
5894                         $searchtext, $co{'tree'};
5895                 my $lastfile = '';
5896                 while (my $line = <$fd>) {
5897                         chomp $line;
5898                         my ($file, $lno, $ltext, $binary);
5899                         last if ($matches++ > 1000);
5900                         if ($line =~ /^Binary file (.+) matches$/) {
5901                                 $file = $1;
5902                                 $binary = 1;
5903                         } else {
5904                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5905                         }
5906                         if ($file ne $lastfile) {
5907                                 $lastfile and print "</td></tr>\n";
5908                                 if ($alternate++) {
5909                                         print "<tr class=\"dark\">\n";
5910                                 } else {
5911                                         print "<tr class=\"light\">\n";
5912                                 }
5913                                 print "<td class=\"list\">".
5914                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5915                                                                file_name=>"$file"),
5916                                                 -class => "list"}, esc_path($file));
5917                                 print "</td><td>\n";
5918                                 $lastfile = $file;
5919                         }
5920                         if ($binary) {
5921                                 print "<div class=\"binary\">Binary file</div>\n";
5922                         } else {
5923                                 $ltext = untabify($ltext);
5924                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5925                                         $ltext = esc_html($1, -nbsp=>1);
5926                                         $ltext .= '<span class="match">';
5927                                         $ltext .= esc_html($2, -nbsp=>1);
5928                                         $ltext .= '</span>';
5929                                         $ltext .= esc_html($3, -nbsp=>1);
5930                                 } else {
5931                                         $ltext = esc_html($ltext, -nbsp=>1);
5932                                 }
5933                                 print "<div class=\"pre\">" .
5934                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5935                                                                file_name=>"$file").'#l'.$lno,
5936                                                 -class => "linenr"}, sprintf('%4i', $lno))
5937                                         . ' ' .  $ltext . "</div>\n";
5938                         }
5939                 }
5940                 if ($lastfile) {
5941                         print "</td></tr>\n";
5942                         if ($matches > 1000) {
5943                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5944                         }
5945                 } else {
5946                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5947                 }
5948                 close $fd;
5949
5950                 print "</table>\n";
5951         }
5952         git_footer_html();
5953 }
5954
5955 sub git_search_help {
5956         git_header_html();
5957         git_print_page_nav('','', $hash,$hash,$hash);
5958         print <<EOT;
5959 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5960 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5961 the pattern entered is recognized as the POSIX extended
5962 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5963 insensitive).</p>
5964 <dl>
5965 <dt><b>commit</b></dt>
5966 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5967 EOT
5968         my $have_grep = gitweb_check_feature('grep');
5969         if ($have_grep) {
5970                 print <<EOT;
5971 <dt><b>grep</b></dt>
5972 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5973     a different one) are searched for the given pattern. On large trees, this search can take
5974 a while and put some strain on the server, so please use it with some consideration. Note that
5975 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5976 case-sensitive.</dd>
5977 EOT
5978         }
5979         print <<EOT;
5980 <dt><b>author</b></dt>
5981 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5982 <dt><b>committer</b></dt>
5983 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5984 EOT
5985         my $have_pickaxe = gitweb_check_feature('pickaxe');
5986         if ($have_pickaxe) {
5987                 print <<EOT;
5988 <dt><b>pickaxe</b></dt>
5989 <dd>All commits that caused the string to appear or disappear from any file (changes that
5990 added, removed or "modified" the string) will be listed. This search can take a while and
5991 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5992 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5993 EOT
5994         }
5995         print "</dl>\n";
5996         git_footer_html();
5997 }
5998
5999 sub git_shortlog {
6000         my $head = git_get_head_hash($project);
6001         if (!defined $hash) {
6002                 $hash = $head;
6003         }
6004         if (!defined $page) {
6005                 $page = 0;
6006         }
6007         my $refs = git_get_references();
6008
6009         my $commit_hash = $hash;
6010         if (defined $hash_parent) {
6011                 $commit_hash = "$hash_parent..$hash";
6012         }
6013         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
6014
6015         my $paging_nav = format_log_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
6016
6017         my $next_link = '';
6018         if ($#commitlist >= 100) {
6019                 $next_link =
6020                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6021                                  -accesskey => "n", -title => "Alt-n"}, "next");
6022         }
6023         my $patch_max = gitweb_check_feature('patches');
6024         if ($patch_max) {
6025                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6026                         $paging_nav .= " &sdot; " .
6027                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6028                                         "patches");
6029                 }
6030         }
6031
6032         git_header_html();
6033         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
6034         git_print_header_div('summary', $project);
6035
6036         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
6037
6038         git_footer_html();
6039 }
6040
6041 ## ......................................................................
6042 ## feeds (RSS, Atom; OPML)
6043
6044 sub git_feed {
6045         my $format = shift || 'atom';
6046         my $have_blame = gitweb_check_feature('blame');
6047
6048         # Atom: http://www.atomenabled.org/developers/syndication/
6049         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6050         if ($format ne 'rss' && $format ne 'atom') {
6051                 die_error(400, "Unknown web feed format");
6052         }
6053
6054         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6055         my $head = $hash || 'HEAD';
6056         my @commitlist = parse_commits($head, 150, 0, $file_name);
6057
6058         my %latest_commit;
6059         my %latest_date;
6060         my $content_type = "application/$format+xml";
6061         if (defined $cgi->http('HTTP_ACCEPT') &&
6062                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6063                 # browser (feed reader) prefers text/xml
6064                 $content_type = 'text/xml';
6065         }
6066         if (defined($commitlist[0])) {
6067                 %latest_commit = %{$commitlist[0]};
6068                 my $latest_epoch = $latest_commit{'committer_epoch'};
6069                 %latest_date   = parse_date($latest_epoch);
6070                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6071                 if (defined $if_modified) {
6072                         my $since;
6073                         if (eval { require HTTP::Date; 1; }) {
6074                                 $since = HTTP::Date::str2time($if_modified);
6075                         } elsif (eval { require Time::ParseDate; 1; }) {
6076                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6077                         }
6078                         if (defined $since && $latest_epoch <= $since) {
6079                                 print $cgi->header(
6080                                         -type => $content_type,
6081                                         -charset => 'utf-8',
6082                                         -last_modified => $latest_date{'rfc2822'},
6083                                         -status => '304 Not Modified');
6084                                 return;
6085                         }
6086                 }
6087                 print $cgi->header(
6088                         -type => $content_type,
6089                         -charset => 'utf-8',
6090                         -last_modified => $latest_date{'rfc2822'});
6091         } else {
6092                 print $cgi->header(
6093                         -type => $content_type,
6094                         -charset => 'utf-8');
6095         }
6096
6097         # Optimization: skip generating the body if client asks only
6098         # for Last-Modified date.
6099         return if ($cgi->request_method() eq 'HEAD');
6100
6101         # header variables
6102         my $title = "$site_name - $project/$action";
6103         my $feed_type = 'log';
6104         if (defined $hash) {
6105                 $title .= " - '$hash'";
6106                 $feed_type = 'branch log';
6107                 if (defined $file_name) {
6108                         $title .= " :: $file_name";
6109                         $feed_type = 'history';
6110                 }
6111         } elsif (defined $file_name) {
6112                 $title .= " - $file_name";
6113                 $feed_type = 'history';
6114         }
6115         $title .= " $feed_type";
6116         my $descr = git_get_project_description($project);
6117         if (defined $descr) {
6118                 $descr = esc_html($descr);
6119         } else {
6120                 $descr = "$project " .
6121                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6122                          " feed";
6123         }
6124         my $owner = git_get_project_owner($project);
6125         $owner = esc_html($owner);
6126
6127         #header
6128         my $alt_url;
6129         if (defined $file_name) {
6130                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6131         } elsif (defined $hash) {
6132                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6133         } else {
6134                 $alt_url = href(-full=>1, action=>"summary");
6135         }
6136         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6137         if ($format eq 'rss') {
6138                 print <<XML;
6139 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6140 <channel>
6141 XML
6142                 print "<title>$title</title>\n" .
6143                       "<link>$alt_url</link>\n" .
6144                       "<description>$descr</description>\n" .
6145                       "<language>en</language>\n" .
6146                       # project owner is responsible for 'editorial' content
6147                       "<managingEditor>$owner</managingEditor>\n";
6148                 if (defined $logo || defined $favicon) {
6149                         # prefer the logo to the favicon, since RSS
6150                         # doesn't allow both
6151                         my $img = esc_url($logo || $favicon);
6152                         print "<image>\n" .
6153                               "<url>$img</url>\n" .
6154                               "<title>$title</title>\n" .
6155                               "<link>$alt_url</link>\n" .
6156                               "</image>\n";
6157                 }
6158                 if (%latest_date) {
6159                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6160                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6161                 }
6162                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6163         } elsif ($format eq 'atom') {
6164                 print <<XML;
6165 <feed xmlns="http://www.w3.org/2005/Atom">
6166 XML
6167                 print "<title>$title</title>\n" .
6168                       "<subtitle>$descr</subtitle>\n" .
6169                       '<link rel="alternate" type="text/html" href="' .
6170                       $alt_url . '" />' . "\n" .
6171                       '<link rel="self" type="' . $content_type . '" href="' .
6172                       $cgi->self_url() . '" />' . "\n" .
6173                       "<id>" . href(-full=>1) . "</id>\n" .
6174                       # use project owner for feed author
6175                       "<author><name>$owner</name></author>\n";
6176                 if (defined $favicon) {
6177                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6178                 }
6179                 if (defined $logo_url) {
6180                         # not twice as wide as tall: 72 x 27 pixels
6181                         print "<logo>" . esc_url($logo) . "</logo>\n";
6182                 }
6183                 if (! %latest_date) {
6184                         # dummy date to keep the feed valid until commits trickle in:
6185                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6186                 } else {
6187                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6188                 }
6189                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6190         }
6191
6192         # contents
6193         for (my $i = 0; $i <= $#commitlist; $i++) {
6194                 my %co = %{$commitlist[$i]};
6195                 my $commit = $co{'id'};
6196                 # we read 150, we always show 30 and the ones more recent than 48 hours
6197                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6198                         last;
6199                 }
6200                 my %cd = parse_date($co{'author_epoch'});
6201
6202                 # get list of changed files
6203                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6204                         $co{'parent'} || "--root",
6205                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6206                         or next;
6207                 my @difftree = map { chomp; $_ } <$fd>;
6208                 close $fd
6209                         or next;
6210
6211                 # print element (entry, item)
6212                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6213                 if ($format eq 'rss') {
6214                         print "<item>\n" .
6215                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6216                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6217                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6218                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6219                               "<link>$co_url</link>\n" .
6220                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6221                               "<content:encoded>" .
6222                               "<![CDATA[\n";
6223                 } elsif ($format eq 'atom') {
6224                         print "<entry>\n" .
6225                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6226                               "<updated>$cd{'iso-8601'}</updated>\n" .
6227                               "<author>\n" .
6228                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6229                         if ($co{'author_email'}) {
6230                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6231                         }
6232                         print "</author>\n" .
6233                               # use committer for contributor
6234                               "<contributor>\n" .
6235                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6236                         if ($co{'committer_email'}) {
6237                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6238                         }
6239                         print "</contributor>\n" .
6240                               "<published>$cd{'iso-8601'}</published>\n" .
6241                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6242                               "<id>$co_url</id>\n" .
6243                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6244                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6245                 }
6246                 my $comment = $co{'comment'};
6247                 print "<pre>\n";
6248                 foreach my $line (@$comment) {
6249                         $line = esc_html($line);
6250                         print "$line\n";
6251                 }
6252                 print "</pre><ul>\n";
6253                 foreach my $difftree_line (@difftree) {
6254                         my %difftree = parse_difftree_raw_line($difftree_line);
6255                         next if !$difftree{'from_id'};
6256
6257                         my $file = $difftree{'file'} || $difftree{'to_file'};
6258
6259                         print "<li>" .
6260                               "[" .
6261                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6262                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6263                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6264                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6265                                       -title => "diff"}, 'D');
6266                         if ($have_blame) {
6267                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6268                                                              file_name=>$file, hash_base=>$commit),
6269                                               -title => "blame"}, 'B');
6270                         }
6271                         # if this is not a feed of a file history
6272                         if (!defined $file_name || $file_name ne $file) {
6273                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6274                                                              file_name=>$file, hash=>$commit),
6275                                               -title => "history"}, 'H');
6276                         }
6277                         $file = esc_path($file);
6278                         print "] ".
6279                               "$file</li>\n";
6280                 }
6281                 if ($format eq 'rss') {
6282                         print "</ul>]]>\n" .
6283                               "</content:encoded>\n" .
6284                               "</item>\n";
6285                 } elsif ($format eq 'atom') {
6286                         print "</ul>\n</div>\n" .
6287                               "</content>\n" .
6288                               "</entry>\n";
6289                 }
6290         }
6291
6292         # end of feed
6293         if ($format eq 'rss') {
6294                 print "</channel>\n</rss>\n";
6295         } elsif ($format eq 'atom') {
6296                 print "</feed>\n";
6297         }
6298 }
6299
6300 sub git_rss {
6301         git_feed('rss');
6302 }
6303
6304 sub git_atom {
6305         git_feed('atom');
6306 }
6307
6308 sub git_opml {
6309         my @list = git_get_projects_list();
6310
6311         print $cgi->header(
6312                 -type => 'text/xml',
6313                 -charset => 'utf-8',
6314                 -content_disposition => 'inline; filename="opml.xml"');
6315
6316         print <<XML;
6317 <?xml version="1.0" encoding="utf-8"?>
6318 <opml version="1.0">
6319 <head>
6320   <title>$site_name OPML Export</title>
6321 </head>
6322 <body>
6323 <outline text="git RSS feeds">
6324 XML
6325
6326         foreach my $pr (@list) {
6327                 my %proj = %$pr;
6328                 my $head = git_get_head_hash($proj{'path'});
6329                 if (!defined $head) {
6330                         next;
6331                 }
6332                 $git_dir = "$projectroot/$proj{'path'}";
6333                 my %co = parse_commit($head);
6334                 if (!%co) {
6335                         next;
6336                 }
6337
6338                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6339                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6340                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6341                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6342         }
6343         print <<XML;
6344 </outline>
6345 </body>
6346 </opml>
6347 XML
6348 }