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