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