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