Lady’s Gitweb - Gitweb/blob - gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 BEGIN {
  22         CGI->compile() if $ENV{'MOD_PERL'};
  23 }
  24
  25 our $cgi = new CGI;
  26 our $version = "++GIT_VERSION++";
  27 our $my_url = $cgi->url();
  28 our $my_uri = $cgi->url(-absolute => 1);
  29
  30 # 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
  74 # URI of GIT logo (72x27 size)
  75 our $logo = "++GITWEB_LOGO++";
  76 # URI of GIT favicon, assumed to be image/png type
  77 our $favicon = "++GITWEB_FAVICON++";
  78
  79 # URI and label (title) of GIT logo link
  80 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  81 #our $logo_label = "git documentation";
  82 our $logo_url = "http://git.or.cz/";
  83 our $logo_label = "git homepage";
  84
  85 # source of projects list
  86 our $projects_list = "++GITWEB_LIST++";
  87
  88 # the width (in characters) of the projects list "Description" column
  89 our $projects_list_description_width = 25;
  90
  91 # default order of projects list
  92 # valid values are none, project, descr, owner, and age
  93 our $default_projects_order = "project";
  94
  95 # show repository only if this file exists
  96 # (only effective if this variable evaluates to true)
  97 our $export_ok = "++GITWEB_EXPORT_OK++";
  98
  99 # show repository only if this subroutine returns true
 100 # when given the path to the project, for example:
 101 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 102 our $export_auth_hook = undef;
 103
 104 # only allow viewing of repositories also shown on the overview page
 105 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 106
 107 # list of git base URLs used for URL to where fetch project from,
 108 # i.e. full URL is "$git_base_url/$project"
 109 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 110
 111 # default blob_plain mimetype and default charset for text/plain blob
 112 our $default_blob_plain_mimetype = 'text/plain';
 113 our $default_text_plain_charset  = undef;
 114
 115 # file to use for guessing MIME types before trying /etc/mime.types
 116 # (relative to the current git repository)
 117 our $mimetypes_file = undef;
 118
 119 # assume this charset if line contains non-UTF-8 characters;
 120 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 121 # for which encoding all byte sequences are valid, for example
 122 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 123 # could be even 'utf-8' for the old behavior)
 124 our $fallback_encoding = 'latin1';
 125
 126 # rename detection options for git-diff and git-diff-tree
 127 # - default is '-M', with the cost proportional to
 128 #   (number of removed files) * (number of new files).
 129 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 130 #   (number of changed files + number of removed files) * (number of new files)
 131 # - even more costly is '-C', '--find-copies-harder' with cost
 132 #   (number of files in the original tree) * (number of new files)
 133 # - one might want to include '-B' option, e.g. '-B', '-M'
 134 our @diff_opts = ('-M'); # taken from git_commit
 135
 136 # information about snapshot formats that gitweb is capable of serving
 137 our %known_snapshot_formats = (
 138         # name => {
 139         #       'display' => display name,
 140         #       'type' => mime type,
 141         #       'suffix' => filename suffix,
 142         #       'format' => --format for git-archive,
 143         #       'compressor' => [compressor command and arguments]
 144         #                       (array reference, optional)}
 145         #
 146         'tgz' => {
 147                 'display' => 'tar.gz',
 148                 'type' => 'application/x-gzip',
 149                 'suffix' => '.tar.gz',
 150                 'format' => 'tar',
 151                 'compressor' => ['gzip']},
 152
 153         'tbz2' => {
 154                 'display' => 'tar.bz2',
 155                 'type' => 'application/x-bzip2',
 156                 'suffix' => '.tar.bz2',
 157                 'format' => 'tar',
 158                 'compressor' => ['bzip2']},
 159
 160         'zip' => {
 161                 'display' => 'zip',
 162                 'type' => 'application/x-zip',
 163                 'suffix' => '.zip',
 164                 'format' => 'zip'},
 165 );
 166
 167 # Aliases so we understand old gitweb.snapshot values in repository
 168 # configuration.
 169 our %known_snapshot_format_aliases = (
 170         'gzip'  => 'tgz',
 171         'bzip2' => 'tbz2',
 172
 173         # backward compatibility: legacy gitweb config support
 174         'x-gzip' => undef, 'gz' => undef,
 175         'x-bzip2' => undef, 'bz2' => undef,
 176         'x-zip' => undef, '' => undef,
 177 );
 178
 179 # You define site-wide feature defaults here; override them with
 180 # $GITWEB_CONFIG as necessary.
 181 our %feature = (
 182         # feature => {
 183         #       'sub' => feature-sub (subroutine),
 184         #       'override' => allow-override (boolean),
 185         #       'default' => [ default options...] (array reference)}
 186         #
 187         # if feature is overridable (it means that allow-override has true value),
 188         # then feature-sub will be called with default options as parameters;
 189         # return value of feature-sub indicates if to enable specified feature
 190         #
 191         # if there is no 'sub' key (no feature-sub), then feature cannot be
 192         # overriden
 193         #
 194         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 195         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 196         # is enabled
 197
 198         # Enable the 'blame' blob view, showing the last commit that modified
 199         # each line in the file. This can be very CPU-intensive.
 200
 201         # To enable system wide have in $GITWEB_CONFIG
 202         # $feature{'blame'}{'default'} = [1];
 203         # To have project specific config enable override in $GITWEB_CONFIG
 204         # $feature{'blame'}{'override'} = 1;
 205         # and in project config gitweb.blame = 0|1;
 206         'blame' => {
 207                 'sub' => sub { feature_bool('blame', @_) },
 208                 'override' => 0,
 209                 'default' => [0]},
 210
 211         # Enable the 'snapshot' link, providing a compressed archive of any
 212         # tree. This can potentially generate high traffic if you have large
 213         # project.
 214
 215         # Value is a list of formats defined in %known_snapshot_formats that
 216         # you wish to offer.
 217         # To disable system wide have in $GITWEB_CONFIG
 218         # $feature{'snapshot'}{'default'} = [];
 219         # To have project specific config enable override in $GITWEB_CONFIG
 220         # $feature{'snapshot'}{'override'} = 1;
 221         # and in project config, a comma-separated list of formats or "none"
 222         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 223         'snapshot' => {
 224                 'sub' => \&feature_snapshot,
 225                 'override' => 0,
 226                 'default' => ['tgz']},
 227
 228         # Enable text search, which will list the commits which match author,
 229         # committer or commit text to a given string.  Enabled by default.
 230         # Project specific override is not supported.
 231         'search' => {
 232                 'override' => 0,
 233                 'default' => [1]},
 234
 235         # Enable grep search, which will list the files in currently selected
 236         # tree containing the given string. Enabled by default. This can be
 237         # potentially CPU-intensive, of course.
 238
 239         # To enable system wide have in $GITWEB_CONFIG
 240         # $feature{'grep'}{'default'} = [1];
 241         # To have project specific config enable override in $GITWEB_CONFIG
 242         # $feature{'grep'}{'override'} = 1;
 243         # and in project config gitweb.grep = 0|1;
 244         'grep' => {
 245                 'sub' => sub { feature_bool('grep', @_) },
 246                 'override' => 0,
 247                 'default' => [1]},
 248
 249         # Enable the pickaxe search, which will list the commits that modified
 250         # a given string in a file. This can be practical and quite faster
 251         # alternative to 'blame', but still potentially CPU-intensive.
 252
 253         # To enable system wide have in $GITWEB_CONFIG
 254         # $feature{'pickaxe'}{'default'} = [1];
 255         # To have project specific config enable override in $GITWEB_CONFIG
 256         # $feature{'pickaxe'}{'override'} = 1;
 257         # and in project config gitweb.pickaxe = 0|1;
 258         'pickaxe' => {
 259                 'sub' => sub { feature_bool('pickaxe', @_) },
 260                 'override' => 0,
 261                 'default' => [1]},
 262
 263         # Make gitweb use an alternative format of the URLs which can be
 264         # more readable and natural-looking: project name is embedded
 265         # directly in the path and the query string contains other
 266         # auxiliary information. All gitweb installations recognize
 267         # URL in either format; this configures in which formats gitweb
 268         # generates links.
 269
 270         # To enable system wide have in $GITWEB_CONFIG
 271         # $feature{'pathinfo'}{'default'} = [1];
 272         # Project specific override is not supported.
 273
 274         # Note that you will need to change the default location of CSS,
 275         # favicon, logo and possibly other files to an absolute URL. Also,
 276         # if gitweb.cgi serves as your indexfile, you will need to force
 277         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 278         'pathinfo' => {
 279                 'override' => 0,
 280                 'default' => [0]},
 281
 282         # Make gitweb consider projects in project root subdirectories
 283         # to be forks of existing projects. Given project $projname.git,
 284         # projects matching $projname/*.git will not be shown in the main
 285         # projects list, instead a '+' mark will be added to $projname
 286         # there and a 'forks' view will be enabled for the project, listing
 287         # all the forks. If project list is taken from a file, forks have
 288         # to be listed after the main project.
 289
 290         # To enable system wide have in $GITWEB_CONFIG
 291         # $feature{'forks'}{'default'} = [1];
 292         # Project specific override is not supported.
 293         'forks' => {
 294                 'override' => 0,
 295                 'default' => [0]},
 296
 297         # Insert custom links to the action bar of all project pages.
 298         # This enables you mainly to link to third-party scripts integrating
 299         # into gitweb; e.g. git-browser for graphical history representation
 300         # or custom web-based repository administration interface.
 301
 302         # The 'default' value consists of a list of triplets in the form
 303         # (label, link, position) where position is the label after which
 304         # to insert the link and link is a format string where %n expands
 305         # to the project name, %f to the project path within the filesystem,
 306         # %h to the current hash (h gitweb parameter) and %b to the current
 307         # hash base (hb gitweb parameter); %% expands to %.
 308
 309         # To enable system wide have in $GITWEB_CONFIG e.g.
 310         # $feature{'actions'}{'default'} = [('graphiclog',
 311         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 312         # Project specific override is not supported.
 313         'actions' => {
 314                 'override' => 0,
 315                 'default' => []},
 316
 317         # Allow gitweb scan project content tags described in ctags/
 318         # of project repository, and display the popular Web 2.0-ish
 319         # "tag cloud" near the project list. Note that this is something
 320         # COMPLETELY different from the normal Git tags.
 321
 322         # gitweb by itself can show existing tags, but it does not handle
 323         # tagging itself; you need an external application for that.
 324         # For an example script, check Girocco's cgi/tagproj.cgi.
 325         # You may want to install the HTML::TagCloud Perl module to get
 326         # a pretty tag cloud instead of just a list of tags.
 327
 328         # To enable system wide have in $GITWEB_CONFIG
 329         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 330         # Project specific override is not supported.
 331         'ctags' => {
 332                 'override' => 0,
 333                 'default' => [0]},
 334
 335         # The maximum number of patches in a patchset generated in patch
 336         # view. Set this to 0 or undef to disable patch view, or to a
 337         # negative number to remove any limit.
 338
 339         # To disable system wide have in $GITWEB_CONFIG
 340         # $feature{'patches'}{'default'} = [0];
 341         # To have project specific config enable override in $GITWEB_CONFIG
 342         # $feature{'patches'}{'override'} = 1;
 343         # and in project config gitweb.patches = 0|n;
 344         # where n is the maximum number of patches allowed in a patchset.
 345         'patches' => {
 346                 'sub' => \&feature_patches,
 347                 'override' => 0,
 348                 'default' => [16]},
 349 );
 350
 351 sub gitweb_get_feature {
 352         my ($name) = @_;
 353         return unless exists $feature{$name};
 354         my ($sub, $override, @defaults) = (
 355                 $feature{$name}{'sub'},
 356                 $feature{$name}{'override'},
 357                 @{$feature{$name}{'default'}});
 358         if (!$override) { return @defaults; }
 359         if (!defined $sub) {
 360                 warn "feature $name is not overrideable";
 361                 return @defaults;
 362         }
 363         return $sub->(@defaults);
 364 }
 365
 366 # A wrapper to check if a given feature is enabled.
 367 # With this, you can say
 368 #
 369 #   my $bool_feat = gitweb_check_feature('bool_feat');
 370 #   gitweb_check_feature('bool_feat') or somecode;
 371 #
 372 # instead of
 373 #
 374 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 375 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 376 #
 377 sub gitweb_check_feature {
 378         return (gitweb_get_feature(@_))[0];
 379 }
 380
 381
 382 sub feature_bool {
 383         my $key = shift;
 384         my ($val) = git_get_project_config($key, '--bool');
 385
 386         if ($val eq 'true') {
 387                 return (1);
 388         } elsif ($val eq 'false') {
 389                 return (0);
 390         }
 391
 392         return ($_[0]);
 393 }
 394
 395 sub feature_snapshot {
 396         my (@fmts) = @_;
 397
 398         my ($val) = git_get_project_config('snapshot');
 399
 400         if ($val) {
 401                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 402         }
 403
 404         return @fmts;
 405 }
 406
 407 sub feature_patches {
 408         my @val = (git_get_project_config('patches', '--int'));
 409
 410         if (@val) {
 411                 return @val;
 412         }
 413
 414         return ($_[0]);
 415 }
 416
 417 # checking HEAD file with -e is fragile if the repository was
 418 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 419 # and then pruned.
 420 sub check_head_link {
 421         my ($dir) = @_;
 422         my $headfile = "$dir/HEAD";
 423         return ((-e $headfile) ||
 424                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 425 }
 426
 427 sub check_export_ok {
 428         my ($dir) = @_;
 429         return (check_head_link($dir) &&
 430                 (!$export_ok || -e "$dir/$export_ok") &&
 431                 (!$export_auth_hook || $export_auth_hook->($dir)));
 432 }
 433
 434 # process alternate names for backward compatibility
 435 # filter out unsupported (unknown) snapshot formats
 436 sub filter_snapshot_fmts {
 437         my @fmts = @_;
 438
 439         @fmts = map {
 440                 exists $known_snapshot_format_aliases{$_} ?
 441                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 442         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 443
 444 }
 445
 446 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 447 if (-e $GITWEB_CONFIG) {
 448         do $GITWEB_CONFIG;
 449 } else {
 450         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 451         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 452 }
 453
 454 # version of the core git binary
 455 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 456
 457 $projects_list ||= $projectroot;
 458
 459 # ======================================================================
 460 # input validation and dispatch
 461
 462 # input parameters can be collected from a variety of sources (presently, CGI
 463 # and PATH_INFO), so we define an %input_params hash that collects them all
 464 # together during validation: this allows subsequent uses (e.g. href()) to be
 465 # agnostic of the parameter origin
 466
 467 our %input_params = ();
 468
 469 # input parameters are stored with the long parameter name as key. This will
 470 # also be used in the href subroutine to convert parameters to their CGI
 471 # equivalent, and since the href() usage is the most frequent one, we store
 472 # the name -> CGI key mapping here, instead of the reverse.
 473 #
 474 # XXX: Warning: If you touch this, check the search form for updating,
 475 # too.
 476
 477 our @cgi_param_mapping = (
 478         project => "p",
 479         action => "a",
 480         file_name => "f",
 481         file_parent => "fp",
 482         hash => "h",
 483         hash_parent => "hp",
 484         hash_base => "hb",
 485         hash_parent_base => "hpb",
 486         page => "pg",
 487         order => "o",
 488         searchtext => "s",
 489         searchtype => "st",
 490         snapshot_format => "sf",
 491         extra_options => "opt",
 492         search_use_regexp => "sr",
 493 );
 494 our %cgi_param_mapping = @cgi_param_mapping;
 495
 496 # we will also need to know the possible actions, for validation
 497 our %actions = (
 498         "blame" => \&git_blame,
 499         "blobdiff" => \&git_blobdiff,
 500         "blobdiff_plain" => \&git_blobdiff_plain,
 501         "blob" => \&git_blob,
 502         "blob_plain" => \&git_blob_plain,
 503         "commitdiff" => \&git_commitdiff,
 504         "commitdiff_plain" => \&git_commitdiff_plain,
 505         "commit" => \&git_commit,
 506         "forks" => \&git_forks,
 507         "heads" => \&git_heads,
 508         "history" => \&git_history,
 509         "log" => \&git_log,
 510         "patch" => \&git_patch,
 511         "patches" => \&git_patches,
 512         "rss" => \&git_rss,
 513         "atom" => \&git_atom,
 514         "search" => \&git_search,
 515         "search_help" => \&git_search_help,
 516         "shortlog" => \&git_shortlog,
 517         "summary" => \&git_summary,
 518         "tag" => \&git_tag,
 519         "tags" => \&git_tags,
 520         "tree" => \&git_tree,
 521         "snapshot" => \&git_snapshot,
 522         "object" => \&git_object,
 523         # those below don't need $project
 524         "opml" => \&git_opml,
 525         "project_list" => \&git_project_list,
 526         "project_index" => \&git_project_index,
 527 );
 528
 529 # finally, we have the hash of allowed extra_options for the commands that
 530 # allow them
 531 our %allowed_options = (
 532         "--no-merges" => [ qw(rss atom log shortlog history) ],
 533 );
 534
 535 # fill %input_params with the CGI parameters. All values except for 'opt'
 536 # should be single values, but opt can be an array. We should probably
 537 # build an array of parameters that can be multi-valued, but since for the time
 538 # being it's only this one, we just single it out
 539 while (my ($name, $symbol) = each %cgi_param_mapping) {
 540         if ($symbol eq 'opt') {
 541                 $input_params{$name} = [ $cgi->param($symbol) ];
 542         } else {
 543                 $input_params{$name} = $cgi->param($symbol);
 544         }
 545 }
 546
 547 # now read PATH_INFO and update the parameter list for missing parameters
 548 sub evaluate_path_info {
 549         return if defined $input_params{'project'};
 550         return if !$path_info;
 551         $path_info =~ s,^/+,,;
 552         return if !$path_info;
 553
 554         # find which part of PATH_INFO is project
 555         my $project = $path_info;
 556         $project =~ s,/+$,,;
 557         while ($project && !check_head_link("$projectroot/$project")) {
 558                 $project =~ s,/*[^/]*$,,;
 559         }
 560         return unless $project;
 561         $input_params{'project'} = $project;
 562
 563         # do not change any parameters if an action is given using the query string
 564         return if $input_params{'action'};
 565         $path_info =~ s,^\Q$project\E/*,,;
 566
 567         # next, check if we have an action
 568         my $action = $path_info;
 569         $action =~ s,/.*$,,;
 570         if (exists $actions{$action}) {
 571                 $path_info =~ s,^$action/*,,;
 572                 $input_params{'action'} = $action;
 573         }
 574
 575         # list of actions that want hash_base instead of hash, but can have no
 576         # pathname (f) parameter
 577         my @wants_base = (
 578                 'tree',
 579                 'history',
 580         );
 581
 582         # we want to catch
 583         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 584         my ($parentrefname, $parentpathname, $refname, $pathname) =
 585                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 586
 587         # first, analyze the 'current' part
 588         if (defined $pathname) {
 589                 # we got "branch:filename" or "branch:dir/"
 590                 # we could use git_get_type(branch:pathname), but:
 591                 # - it needs $git_dir
 592                 # - it does a git() call
 593                 # - the convention of terminating directories with a slash
 594                 #   makes it superfluous
 595                 # - embedding the action in the PATH_INFO would make it even
 596                 #   more superfluous
 597                 $pathname =~ s,^/+,,;
 598                 if (!$pathname || substr($pathname, -1) eq "/") {
 599                         $input_params{'action'} ||= "tree";
 600                         $pathname =~ s,/$,,;
 601                 } else {
 602                         # the default action depends on whether we had parent info
 603                         # or not
 604                         if ($parentrefname) {
 605                                 $input_params{'action'} ||= "blobdiff_plain";
 606                         } else {
 607                                 $input_params{'action'} ||= "blob_plain";
 608                         }
 609                 }
 610                 $input_params{'hash_base'} ||= $refname;
 611                 $input_params{'file_name'} ||= $pathname;
 612         } elsif (defined $refname) {
 613                 # we got "branch". In this case we have to choose if we have to
 614                 # set hash or hash_base.
 615                 #
 616                 # Most of the actions without a pathname only want hash to be
 617                 # set, except for the ones specified in @wants_base that want
 618                 # hash_base instead. It should also be noted that hand-crafted
 619                 # links having 'history' as an action and no pathname or hash
 620                 # set will fail, but that happens regardless of PATH_INFO.
 621                 $input_params{'action'} ||= "shortlog";
 622                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 623                         $input_params{'hash_base'} ||= $refname;
 624                 } else {
 625                         $input_params{'hash'} ||= $refname;
 626                 }
 627         }
 628
 629         # next, handle the 'parent' part, if present
 630         if (defined $parentrefname) {
 631                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 632                 # someproject/blobdiff/oldrev..newrev:/filename
 633                 if ($parentpathname) {
 634                         $parentpathname =~ s,^/+,,;
 635                         $parentpathname =~ s,/$,,;
 636                         $input_params{'file_parent'} ||= $parentpathname;
 637                 } else {
 638                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 639                 }
 640                 # we assume that hash_parent_base is wanted if a path was specified,
 641                 # or if the action wants hash_base instead of hash
 642                 if (defined $input_params{'file_parent'} ||
 643                         grep { $_ eq $input_params{'action'} } @wants_base) {
 644                         $input_params{'hash_parent_base'} ||= $parentrefname;
 645                 } else {
 646                         $input_params{'hash_parent'} ||= $parentrefname;
 647                 }
 648         }
 649
 650         # for the snapshot action, we allow URLs in the form
 651         # $project/snapshot/$hash.ext
 652         # where .ext determines the snapshot and gets removed from the
 653         # passed $refname to provide the $hash.
 654         #
 655         # To be able to tell that $refname includes the format extension, we
 656         # require the following two conditions to be satisfied:
 657         # - the hash input parameter MUST have been set from the $refname part
 658         #   of the URL (i.e. they must be equal)
 659         # - the snapshot format MUST NOT have been defined already (e.g. from
 660         #   CGI parameter sf)
 661         # It's also useless to try any matching unless $refname has a dot,
 662         # so we check for that too
 663         if (defined $input_params{'action'} &&
 664                 $input_params{'action'} eq 'snapshot' &&
 665                 defined $refname && index($refname, '.') != -1 &&
 666                 $refname eq $input_params{'hash'} &&
 667                 !defined $input_params{'snapshot_format'}) {
 668                 # We loop over the known snapshot formats, checking for
 669                 # extensions. Allowed extensions are both the defined suffix
 670                 # (which includes the initial dot already) and the snapshot
 671                 # format key itself, with a prepended dot
 672                 while (my ($fmt, %opt) = each %known_snapshot_formats) {
 673                         my $hash = $refname;
 674                         my $sfx;
 675                         $hash =~ s/(\Q$opt{'suffix'}\E|\Q.$fmt\E)$//;
 676                         next unless $sfx = $1;
 677                         # a valid suffix was found, so set the snapshot format
 678                         # and reset the hash parameter
 679                         $input_params{'snapshot_format'} = $fmt;
 680                         $input_params{'hash'} = $hash;
 681                         # we also set the format suffix to the one requested
 682                         # in the URL: this way a request for e.g. .tgz returns
 683                         # a .tgz instead of a .tar.gz
 684                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 685                         last;
 686                 }
 687         }
 688 }
 689 evaluate_path_info();
 690
 691 our $action = $input_params{'action'};
 692 if (defined $action) {
 693         if (!validate_action($action)) {
 694                 die_error(400, "Invalid action parameter");
 695         }
 696 }
 697
 698 # parameters which are pathnames
 699 our $project = $input_params{'project'};
 700 if (defined $project) {
 701         if (!validate_project($project)) {
 702                 undef $project;
 703                 die_error(404, "No such project");
 704         }
 705 }
 706
 707 our $file_name = $input_params{'file_name'};
 708 if (defined $file_name) {
 709         if (!validate_pathname($file_name)) {
 710                 die_error(400, "Invalid file parameter");
 711         }
 712 }
 713
 714 our $file_parent = $input_params{'file_parent'};
 715 if (defined $file_parent) {
 716         if (!validate_pathname($file_parent)) {
 717                 die_error(400, "Invalid file parent parameter");
 718         }
 719 }
 720
 721 # parameters which are refnames
 722 our $hash = $input_params{'hash'};
 723 if (defined $hash) {
 724         if (!validate_refname($hash)) {
 725                 die_error(400, "Invalid hash parameter");
 726         }
 727 }
 728
 729 our $hash_parent = $input_params{'hash_parent'};
 730 if (defined $hash_parent) {
 731         if (!validate_refname($hash_parent)) {
 732                 die_error(400, "Invalid hash parent parameter");
 733         }
 734 }
 735
 736 our $hash_base = $input_params{'hash_base'};
 737 if (defined $hash_base) {
 738         if (!validate_refname($hash_base)) {
 739                 die_error(400, "Invalid hash base parameter");
 740         }
 741 }
 742
 743 our @extra_options = @{$input_params{'extra_options'}};
 744 # @extra_options is always defined, since it can only be (currently) set from
 745 # CGI, and $cgi->param() returns the empty array in array context if the param
 746 # is not set
 747 foreach my $opt (@extra_options) {
 748         if (not exists $allowed_options{$opt}) {
 749                 die_error(400, "Invalid option parameter");
 750         }
 751         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 752                 die_error(400, "Invalid option parameter for this action");
 753         }
 754 }
 755
 756 our $hash_parent_base = $input_params{'hash_parent_base'};
 757 if (defined $hash_parent_base) {
 758         if (!validate_refname($hash_parent_base)) {
 759                 die_error(400, "Invalid hash parent base parameter");
 760         }
 761 }
 762
 763 # other parameters
 764 our $page = $input_params{'page'};
 765 if (defined $page) {
 766         if ($page =~ m/[^0-9]/) {
 767                 die_error(400, "Invalid page parameter");
 768         }
 769 }
 770
 771 our $searchtype = $input_params{'searchtype'};
 772 if (defined $searchtype) {
 773         if ($searchtype =~ m/[^a-z]/) {
 774                 die_error(400, "Invalid searchtype parameter");
 775         }
 776 }
 777
 778 our $search_use_regexp = $input_params{'search_use_regexp'};
 779
 780 our $searchtext = $input_params{'searchtext'};
 781 our $search_regexp;
 782 if (defined $searchtext) {
 783         if (length($searchtext) < 2) {
 784                 die_error(403, "At least two characters are required for search parameter");
 785         }
 786         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 787 }
 788
 789 # path to the current git repository
 790 our $git_dir;
 791 $git_dir = "$projectroot/$project" if $project;
 792
 793 # list of supported snapshot formats
 794 our @snapshot_fmts = gitweb_get_feature('snapshot');
 795 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 796
 797 # dispatch
 798 if (!defined $action) {
 799         if (defined $hash) {
 800                 $action = git_get_type($hash);
 801         } elsif (defined $hash_base && defined $file_name) {
 802                 $action = git_get_type("$hash_base:$file_name");
 803         } elsif (defined $project) {
 804                 $action = 'summary';
 805         } else {
 806                 $action = 'project_list';
 807         }
 808 }
 809 if (!defined($actions{$action})) {
 810         die_error(400, "Unknown action");
 811 }
 812 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 813     !$project) {
 814         die_error(400, "Project needed");
 815 }
 816 $actions{$action}->();
 817 exit;
 818
 819 ## ======================================================================
 820 ## action links
 821
 822 sub href (%) {
 823         my %params = @_;
 824         # default is to use -absolute url() i.e. $my_uri
 825         my $href = $params{-full} ? $my_url : $my_uri;
 826
 827         $params{'project'} = $project unless exists $params{'project'};
 828
 829         if ($params{-replay}) {
 830                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 831                         if (!exists $params{$name}) {
 832                                 $params{$name} = $input_params{$name};
 833                         }
 834                 }
 835         }
 836
 837         my $use_pathinfo = gitweb_check_feature('pathinfo');
 838         if ($use_pathinfo and defined $params{'project'}) {
 839                 # try to put as many parameters as possible in PATH_INFO:
 840                 #   - project name
 841                 #   - action
 842                 #   - hash_parent or hash_parent_base:/file_parent
 843                 #   - hash or hash_base:/filename
 844                 #   - the snapshot_format as an appropriate suffix
 845
 846                 # When the script is the root DirectoryIndex for the domain,
 847                 # $href here would be something like http://gitweb.example.com/
 848                 # Thus, we strip any trailing / from $href, to spare us double
 849                 # slashes in the final URL
 850                 $href =~ s,/$,,;
 851
 852                 # Then add the project name, if present
 853                 $href .= "/".esc_url($params{'project'});
 854                 delete $params{'project'};
 855
 856                 # since we destructively absorb parameters, we keep this
 857                 # boolean that remembers if we're handling a snapshot
 858                 my $is_snapshot = $params{'action'} eq 'snapshot';
 859
 860                 # Summary just uses the project path URL, any other action is
 861                 # added to the URL
 862                 if (defined $params{'action'}) {
 863                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
 864                         delete $params{'action'};
 865                 }
 866
 867                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
 868                 # stripping nonexistent or useless pieces
 869                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
 870                         || $params{'hash_parent'} || $params{'hash'});
 871                 if (defined $params{'hash_base'}) {
 872                         if (defined $params{'hash_parent_base'}) {
 873                                 $href .= esc_url($params{'hash_parent_base'});
 874                                 # skip the file_parent if it's the same as the file_name
 875                                 delete $params{'file_parent'} if $params{'file_parent'} eq $params{'file_name'};
 876                                 if (defined $params{'file_parent'} && $params{'file_parent'} !~ /\.\./) {
 877                                         $href .= ":/".esc_url($params{'file_parent'});
 878                                         delete $params{'file_parent'};
 879                                 }
 880                                 $href .= "..";
 881                                 delete $params{'hash_parent'};
 882                                 delete $params{'hash_parent_base'};
 883                         } elsif (defined $params{'hash_parent'}) {
 884                                 $href .= esc_url($params{'hash_parent'}). "..";
 885                                 delete $params{'hash_parent'};
 886                         }
 887
 888                         $href .= esc_url($params{'hash_base'});
 889                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
 890                                 $href .= ":/".esc_url($params{'file_name'});
 891                                 delete $params{'file_name'};
 892                         }
 893                         delete $params{'hash'};
 894                         delete $params{'hash_base'};
 895                 } elsif (defined $params{'hash'}) {
 896                         $href .= esc_url($params{'hash'});
 897                         delete $params{'hash'};
 898                 }
 899
 900                 # If the action was a snapshot, we can absorb the
 901                 # snapshot_format parameter too
 902                 if ($is_snapshot) {
 903                         my $fmt = $params{'snapshot_format'};
 904                         # snapshot_format should always be defined when href()
 905                         # is called, but just in case some code forgets, we
 906                         # fall back to the default
 907                         $fmt ||= $snapshot_fmts[0];
 908                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
 909                         delete $params{'snapshot_format'};
 910                 }
 911         }
 912
 913         # now encode the parameters explicitly
 914         my @result = ();
 915         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
 916                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
 917                 if (defined $params{$name}) {
 918                         if (ref($params{$name}) eq "ARRAY") {
 919                                 foreach my $par (@{$params{$name}}) {
 920                                         push @result, $symbol . "=" . esc_param($par);
 921                                 }
 922                         } else {
 923                                 push @result, $symbol . "=" . esc_param($params{$name});
 924                         }
 925                 }
 926         }
 927         $href .= "?" . join(';', @result) if scalar @result;
 928
 929         return $href;
 930 }
 931
 932
 933 ## ======================================================================
 934 ## validation, quoting/unquoting and escaping
 935
 936 sub validate_action {
 937         my $input = shift || return undef;
 938         return undef unless exists $actions{$input};
 939         return $input;
 940 }
 941
 942 sub validate_project {
 943         my $input = shift || return undef;
 944         if (!validate_pathname($input) ||
 945                 !(-d "$projectroot/$input") ||
 946                 !check_export_ok("$projectroot/$input") ||
 947                 ($strict_export && !project_in_list($input))) {
 948                 return undef;
 949         } else {
 950                 return $input;
 951         }
 952 }
 953
 954 sub validate_pathname {
 955         my $input = shift || return undef;
 956
 957         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 958         # at the beginning, at the end, and between slashes.
 959         # also this catches doubled slashes
 960         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 961                 return undef;
 962         }
 963         # no null characters
 964         if ($input =~ m!\0!) {
 965                 return undef;
 966         }
 967         return $input;
 968 }
 969
 970 sub validate_refname {
 971         my $input = shift || return undef;
 972
 973         # textual hashes are O.K.
 974         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 975                 return $input;
 976         }
 977         # it must be correct pathname
 978         $input = validate_pathname($input)
 979                 or return undef;
 980         # restrictions on ref name according to git-check-ref-format
 981         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
 982                 return undef;
 983         }
 984         return $input;
 985 }
 986
 987 # decode sequences of octets in utf8 into Perl's internal form,
 988 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
 989 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
 990 sub to_utf8 {
 991         my $str = shift;
 992         if (utf8::valid($str)) {
 993                 utf8::decode($str);
 994                 return $str;
 995         } else {
 996                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
 997         }
 998 }
 999
1000 # quote unsafe chars, but keep the slash, even when it's not
1001 # correct, but quoted slashes look too horrible in bookmarks
1002 sub esc_param {
1003         my $str = shift;
1004         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
1005         $str =~ s/\+/%2B/g;
1006         $str =~ s/ /\+/g;
1007         return $str;
1008 }
1009
1010 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1011 sub esc_url {
1012         my $str = shift;
1013         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1014         $str =~ s/\+/%2B/g;
1015         $str =~ s/ /\+/g;
1016         return $str;
1017 }
1018
1019 # replace invalid utf8 character with SUBSTITUTION sequence
1020 sub esc_html ($;%) {
1021         my $str = shift;
1022         my %opts = @_;
1023
1024         $str = to_utf8($str);
1025         $str = $cgi->escapeHTML($str);
1026         if ($opts{'-nbsp'}) {
1027                 $str =~ s/ /&nbsp;/g;
1028         }
1029         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1030         return $str;
1031 }
1032
1033 # quote control characters and escape filename to HTML
1034 sub esc_path {
1035         my $str = shift;
1036         my %opts = @_;
1037
1038         $str = to_utf8($str);
1039         $str = $cgi->escapeHTML($str);
1040         if ($opts{'-nbsp'}) {
1041                 $str =~ s/ /&nbsp;/g;
1042         }
1043         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1044         return $str;
1045 }
1046
1047 # Make control characters "printable", using character escape codes (CEC)
1048 sub quot_cec {
1049         my $cntrl = shift;
1050         my %opts = @_;
1051         my %es = ( # character escape codes, aka escape sequences
1052                 "\t" => '\t',   # tab            (HT)
1053                 "\n" => '\n',   # line feed      (LF)
1054                 "\r" => '\r',   # carrige return (CR)
1055                 "\f" => '\f',   # form feed      (FF)
1056                 "\b" => '\b',   # backspace      (BS)
1057                 "\a" => '\a',   # alarm (bell)   (BEL)
1058                 "\e" => '\e',   # escape         (ESC)
1059                 "\013" => '\v', # vertical tab   (VT)
1060                 "\000" => '\0', # nul character  (NUL)
1061         );
1062         my $chr = ( (exists $es{$cntrl})
1063                     ? $es{$cntrl}
1064                     : sprintf('\%2x', ord($cntrl)) );
1065         if ($opts{-nohtml}) {
1066                 return $chr;
1067         } else {
1068                 return "<span class=\"cntrl\">$chr</span>";
1069         }
1070 }
1071
1072 # Alternatively use unicode control pictures codepoints,
1073 # Unicode "printable representation" (PR)
1074 sub quot_upr {
1075         my $cntrl = shift;
1076         my %opts = @_;
1077
1078         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1079         if ($opts{-nohtml}) {
1080                 return $chr;
1081         } else {
1082                 return "<span class=\"cntrl\">$chr</span>";
1083         }
1084 }
1085
1086 # git may return quoted and escaped filenames
1087 sub unquote {
1088         my $str = shift;
1089
1090         sub unq {
1091                 my $seq = shift;
1092                 my %es = ( # character escape codes, aka escape sequences
1093                         't' => "\t",   # tab            (HT, TAB)
1094                         'n' => "\n",   # newline        (NL)
1095                         'r' => "\r",   # return         (CR)
1096                         'f' => "\f",   # form feed      (FF)
1097                         'b' => "\b",   # backspace      (BS)
1098                         'a' => "\a",   # alarm (bell)   (BEL)
1099                         'e' => "\e",   # escape         (ESC)
1100                         'v' => "\013", # vertical tab   (VT)
1101                 );
1102
1103                 if ($seq =~ m/^[0-7]{1,3}$/) {
1104                         # octal char sequence
1105                         return chr(oct($seq));
1106                 } elsif (exists $es{$seq}) {
1107                         # C escape sequence, aka character escape code
1108                         return $es{$seq};
1109                 }
1110                 # quoted ordinary character
1111                 return $seq;
1112         }
1113
1114         if ($str =~ m/^"(.*)"$/) {
1115                 # needs unquoting
1116                 $str = $1;
1117                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1118         }
1119         return $str;
1120 }
1121
1122 # escape tabs (convert tabs to spaces)
1123 sub untabify {
1124         my $line = shift;
1125
1126         while ((my $pos = index($line, "\t")) != -1) {
1127                 if (my $count = (8 - ($pos % 8))) {
1128                         my $spaces = ' ' x $count;
1129                         $line =~ s/\t/$spaces/;
1130                 }
1131         }
1132
1133         return $line;
1134 }
1135
1136 sub project_in_list {
1137         my $project = shift;
1138         my @list = git_get_projects_list();
1139         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1140 }
1141
1142 ## ----------------------------------------------------------------------
1143 ## HTML aware string manipulation
1144
1145 # Try to chop given string on a word boundary between position
1146 # $len and $len+$add_len. If there is no word boundary there,
1147 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1148 # (marking chopped part) would be longer than given string.
1149 sub chop_str {
1150         my $str = shift;
1151         my $len = shift;
1152         my $add_len = shift || 10;
1153         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1154
1155         # Make sure perl knows it is utf8 encoded so we don't
1156         # cut in the middle of a utf8 multibyte char.
1157         $str = to_utf8($str);
1158
1159         # allow only $len chars, but don't cut a word if it would fit in $add_len
1160         # if it doesn't fit, cut it if it's still longer than the dots we would add
1161         # remove chopped character entities entirely
1162
1163         # when chopping in the middle, distribute $len into left and right part
1164         # return early if chopping wouldn't make string shorter
1165         if ($where eq 'center') {
1166                 return $str if ($len + 5 >= length($str)); # filler is length 5
1167                 $len = int($len/2);
1168         } else {
1169                 return $str if ($len + 4 >= length($str)); # filler is length 4
1170         }
1171
1172         # regexps: ending and beginning with word part up to $add_len
1173         my $endre = qr/.{$len}\w{0,$add_len}/;
1174         my $begre = qr/\w{0,$add_len}.{$len}/;
1175
1176         if ($where eq 'left') {
1177                 $str =~ m/^(.*?)($begre)$/;
1178                 my ($lead, $body) = ($1, $2);
1179                 if (length($lead) > 4) {
1180                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
1181                         $lead = " ...";
1182                 }
1183                 return "$lead$body";
1184
1185         } elsif ($where eq 'center') {
1186                 $str =~ m/^($endre)(.*)$/;
1187                 my ($left, $str)  = ($1, $2);
1188                 $str =~ m/^(.*?)($begre)$/;
1189                 my ($mid, $right) = ($1, $2);
1190                 if (length($mid) > 5) {
1191                         $left  =~ s/&[^;]*$//;
1192                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
1193                         $mid = " ... ";
1194                 }
1195                 return "$left$mid$right";
1196
1197         } else {
1198                 $str =~ m/^($endre)(.*)$/;
1199                 my $body = $1;
1200                 my $tail = $2;
1201                 if (length($tail) > 4) {
1202                         $body =~ s/&[^;]*$//;
1203                         $tail = "... ";
1204                 }
1205                 return "$body$tail";
1206         }
1207 }
1208
1209 # takes the same arguments as chop_str, but also wraps a <span> around the
1210 # result with a title attribute if it does get chopped. Additionally, the
1211 # string is HTML-escaped.
1212 sub chop_and_escape_str {
1213         my ($str) = @_;
1214
1215         my $chopped = chop_str(@_);
1216         if ($chopped eq $str) {
1217                 return esc_html($chopped);
1218         } else {
1219                 $str =~ s/([[:cntrl:]])/?/g;
1220                 return $cgi->span({-title=>$str}, esc_html($chopped));
1221         }
1222 }
1223
1224 ## ----------------------------------------------------------------------
1225 ## functions returning short strings
1226
1227 # CSS class for given age value (in seconds)
1228 sub age_class {
1229         my $age = shift;
1230
1231         if (!defined $age) {
1232                 return "noage";
1233         } elsif ($age < 60*60*2) {
1234                 return "age0";
1235         } elsif ($age < 60*60*24*2) {
1236                 return "age1";
1237         } else {
1238                 return "age2";
1239         }
1240 }
1241
1242 # convert age in seconds to "nn units ago" string
1243 sub age_string {
1244         my $age = shift;
1245         my $age_str;
1246
1247         if ($age > 60*60*24*365*2) {
1248                 $age_str = (int $age/60/60/24/365);
1249                 $age_str .= " years ago";
1250         } elsif ($age > 60*60*24*(365/12)*2) {
1251                 $age_str = int $age/60/60/24/(365/12);
1252                 $age_str .= " months ago";
1253         } elsif ($age > 60*60*24*7*2) {
1254                 $age_str = int $age/60/60/24/7;
1255                 $age_str .= " weeks ago";
1256         } elsif ($age > 60*60*24*2) {
1257                 $age_str = int $age/60/60/24;
1258                 $age_str .= " days ago";
1259         } elsif ($age > 60*60*2) {
1260                 $age_str = int $age/60/60;
1261                 $age_str .= " hours ago";
1262         } elsif ($age > 60*2) {
1263                 $age_str = int $age/60;
1264                 $age_str .= " min ago";
1265         } elsif ($age > 2) {
1266                 $age_str = int $age;
1267                 $age_str .= " sec ago";
1268         } else {
1269                 $age_str .= " right now";
1270         }
1271         return $age_str;
1272 }
1273
1274 use constant {
1275         S_IFINVALID => 0030000,
1276         S_IFGITLINK => 0160000,
1277 };
1278
1279 # submodule/subproject, a commit object reference
1280 sub S_ISGITLINK($) {
1281         my $mode = shift;
1282
1283         return (($mode & S_IFMT) == S_IFGITLINK)
1284 }
1285
1286 # convert file mode in octal to symbolic file mode string
1287 sub mode_str {
1288         my $mode = oct shift;
1289
1290         if (S_ISGITLINK($mode)) {
1291                 return 'm---------';
1292         } elsif (S_ISDIR($mode & S_IFMT)) {
1293                 return 'drwxr-xr-x';
1294         } elsif (S_ISLNK($mode)) {
1295                 return 'lrwxrwxrwx';
1296         } elsif (S_ISREG($mode)) {
1297                 # git cares only about the executable bit
1298                 if ($mode & S_IXUSR) {
1299                         return '-rwxr-xr-x';
1300                 } else {
1301                         return '-rw-r--r--';
1302                 };
1303         } else {
1304                 return '----------';
1305         }
1306 }
1307
1308 # convert file mode in octal to file type string
1309 sub file_type {
1310         my $mode = shift;
1311
1312         if ($mode !~ m/^[0-7]+$/) {
1313                 return $mode;
1314         } else {
1315                 $mode = oct $mode;
1316         }
1317
1318         if (S_ISGITLINK($mode)) {
1319                 return "submodule";
1320         } elsif (S_ISDIR($mode & S_IFMT)) {
1321                 return "directory";
1322         } elsif (S_ISLNK($mode)) {
1323                 return "symlink";
1324         } elsif (S_ISREG($mode)) {
1325                 return "file";
1326         } else {
1327                 return "unknown";
1328         }
1329 }
1330
1331 # convert file mode in octal to file type description string
1332 sub file_type_long {
1333         my $mode = shift;
1334
1335         if ($mode !~ m/^[0-7]+$/) {
1336                 return $mode;
1337         } else {
1338                 $mode = oct $mode;
1339         }
1340
1341         if (S_ISGITLINK($mode)) {
1342                 return "submodule";
1343         } elsif (S_ISDIR($mode & S_IFMT)) {
1344                 return "directory";
1345         } elsif (S_ISLNK($mode)) {
1346                 return "symlink";
1347         } elsif (S_ISREG($mode)) {
1348                 if ($mode & S_IXUSR) {
1349                         return "executable";
1350                 } else {
1351                         return "file";
1352                 };
1353         } else {
1354                 return "unknown";
1355         }
1356 }
1357
1358
1359 ## ----------------------------------------------------------------------
1360 ## functions returning short HTML fragments, or transforming HTML fragments
1361 ## which don't belong to other sections
1362
1363 # format line of commit message.
1364 sub format_log_line_html {
1365         my $line = shift;
1366
1367         $line = esc_html($line, -nbsp=>1);
1368         if ($line =~ m/([0-9a-fA-F]{8,40})/) {
1369                 my $hash_text = $1;
1370                 my $link =
1371                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
1372                                 -class => "text"}, $hash_text);
1373                 $line =~ s/$hash_text/$link/;
1374         }
1375         return $line;
1376 }
1377
1378 # format marker of refs pointing to given object
1379
1380 # the destination action is chosen based on object type and current context:
1381 # - for annotated tags, we choose the tag view unless it's the current view
1382 #   already, in which case we go to shortlog view
1383 # - for other refs, we keep the current view if we're in history, shortlog or
1384 #   log view, and select shortlog otherwise
1385 sub format_ref_marker {
1386         my ($refs, $id) = @_;
1387         my $markers = '';
1388
1389         if (defined $refs->{$id}) {
1390                 foreach my $ref (@{$refs->{$id}}) {
1391                         # this code exploits the fact that non-lightweight tags are the
1392                         # only indirect objects, and that they are the only objects for which
1393                         # we want to use tag instead of shortlog as action
1394                         my ($type, $name) = qw();
1395                         my $indirect = ($ref =~ s/\^\{\}$//);
1396                         # e.g. tags/v2.6.11 or heads/next
1397                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1398                                 $type = $1;
1399                                 $name = $2;
1400                         } else {
1401                                 $type = "ref";
1402                                 $name = $ref;
1403                         }
1404
1405                         my $class = $type;
1406                         $class .= " indirect" if $indirect;
1407
1408                         my $dest_action = "shortlog";
1409
1410                         if ($indirect) {
1411                                 $dest_action = "tag" unless $action eq "tag";
1412                         } elsif ($action =~ /^(history|(short)?log)$/) {
1413                                 $dest_action = $action;
1414                         }
1415
1416                         my $dest = "";
1417                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1418                         $dest .= $ref;
1419
1420                         my $link = $cgi->a({
1421                                 -href => href(
1422                                         action=>$dest_action,
1423                                         hash=>$dest
1424                                 )}, $name);
1425
1426                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1427                                 $link . "</span>";
1428                 }
1429         }
1430
1431         if ($markers) {
1432                 return ' <span class="refs">'. $markers . '</span>';
1433         } else {
1434                 return "";
1435         }
1436 }
1437
1438 # format, perhaps shortened and with markers, title line
1439 sub format_subject_html {
1440         my ($long, $short, $href, $extra) = @_;
1441         $extra = '' unless defined($extra);
1442
1443         if (length($short) < length($long)) {
1444                 return $cgi->a({-href => $href, -class => "list subject",
1445                                 -title => to_utf8($long)},
1446                        esc_html($short) . $extra);
1447         } else {
1448                 return $cgi->a({-href => $href, -class => "list subject"},
1449                        esc_html($long)  . $extra);
1450         }
1451 }
1452
1453 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1454 sub format_git_diff_header_line {
1455         my $line = shift;
1456         my $diffinfo = shift;
1457         my ($from, $to) = @_;
1458
1459         if ($diffinfo->{'nparents'}) {
1460                 # combined diff
1461                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1462                 if ($to->{'href'}) {
1463                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1464                                          esc_path($to->{'file'}));
1465                 } else { # file was deleted (no href)
1466                         $line .= esc_path($to->{'file'});
1467                 }
1468         } else {
1469                 # "ordinary" diff
1470                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1471                 if ($from->{'href'}) {
1472                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1473                                          'a/' . esc_path($from->{'file'}));
1474                 } else { # file was added (no href)
1475                         $line .= 'a/' . esc_path($from->{'file'});
1476                 }
1477                 $line .= ' ';
1478                 if ($to->{'href'}) {
1479                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1480                                          'b/' . esc_path($to->{'file'}));
1481                 } else { # file was deleted
1482                         $line .= 'b/' . esc_path($to->{'file'});
1483                 }
1484         }
1485
1486         return "<div class=\"diff header\">$line</div>\n";
1487 }
1488
1489 # format extended diff header line, before patch itself
1490 sub format_extended_diff_header_line {
1491         my $line = shift;
1492         my $diffinfo = shift;
1493         my ($from, $to) = @_;
1494
1495         # match <path>
1496         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1497                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1498                                        esc_path($from->{'file'}));
1499         }
1500         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1501                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1502                                  esc_path($to->{'file'}));
1503         }
1504         # match single <mode>
1505         if ($line =~ m/\s(\d{6})$/) {
1506                 $line .= '<span class="info"> (' .
1507                          file_type_long($1) .
1508                          ')</span>';
1509         }
1510         # match <hash>
1511         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1512                 # can match only for combined diff
1513                 $line = 'index ';
1514                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1515                         if ($from->{'href'}[$i]) {
1516                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1517                                                   -class=>"hash"},
1518                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1519                         } else {
1520                                 $line .= '0' x 7;
1521                         }
1522                         # separator
1523                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1524                 }
1525                 $line .= '..';
1526                 if ($to->{'href'}) {
1527                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1528                                          substr($diffinfo->{'to_id'},0,7));
1529                 } else {
1530                         $line .= '0' x 7;
1531                 }
1532
1533         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1534                 # can match only for ordinary diff
1535                 my ($from_link, $to_link);
1536                 if ($from->{'href'}) {
1537                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1538                                              substr($diffinfo->{'from_id'},0,7));
1539                 } else {
1540                         $from_link = '0' x 7;
1541                 }
1542                 if ($to->{'href'}) {
1543                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1544                                            substr($diffinfo->{'to_id'},0,7));
1545                 } else {
1546                         $to_link = '0' x 7;
1547                 }
1548                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1549                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1550         }
1551
1552         return $line . "<br/>\n";
1553 }
1554
1555 # format from-file/to-file diff header
1556 sub format_diff_from_to_header {
1557         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1558         my $line;
1559         my $result = '';
1560
1561         $line = $from_line;
1562         #assert($line =~ m/^---/) if DEBUG;
1563         # no extra formatting for "^--- /dev/null"
1564         if (! $diffinfo->{'nparents'}) {
1565                 # ordinary (single parent) diff
1566                 if ($line =~ m!^--- "?a/!) {
1567                         if ($from->{'href'}) {
1568                                 $line = '--- a/' .
1569                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1570                                                 esc_path($from->{'file'}));
1571                         } else {
1572                                 $line = '--- a/' .
1573                                         esc_path($from->{'file'});
1574                         }
1575                 }
1576                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1577
1578         } else {
1579                 # combined diff (merge commit)
1580                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1581                         if ($from->{'href'}[$i]) {
1582                                 $line = '--- ' .
1583                                         $cgi->a({-href=>href(action=>"blobdiff",
1584                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1585                                                              hash_parent_base=>$parents[$i],
1586                                                              file_parent=>$from->{'file'}[$i],
1587                                                              hash=>$diffinfo->{'to_id'},
1588                                                              hash_base=>$hash,
1589                                                              file_name=>$to->{'file'}),
1590                                                  -class=>"path",
1591                                                  -title=>"diff" . ($i+1)},
1592                                                 $i+1) .
1593                                         '/' .
1594                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1595                                                 esc_path($from->{'file'}[$i]));
1596                         } else {
1597                                 $line = '--- /dev/null';
1598                         }
1599                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1600                 }
1601         }
1602
1603         $line = $to_line;
1604         #assert($line =~ m/^\+\+\+/) if DEBUG;
1605         # no extra formatting for "^+++ /dev/null"
1606         if ($line =~ m!^\+\+\+ "?b/!) {
1607                 if ($to->{'href'}) {
1608                         $line = '+++ b/' .
1609                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1610                                         esc_path($to->{'file'}));
1611                 } else {
1612                         $line = '+++ b/' .
1613                                 esc_path($to->{'file'});
1614                 }
1615         }
1616         $result .= qq!<div class="diff to_file">$line</div>\n!;
1617
1618         return $result;
1619 }
1620
1621 # create note for patch simplified by combined diff
1622 sub format_diff_cc_simplified {
1623         my ($diffinfo, @parents) = @_;
1624         my $result = '';
1625
1626         $result .= "<div class=\"diff header\">" .
1627                    "diff --cc ";
1628         if (!is_deleted($diffinfo)) {
1629                 $result .= $cgi->a({-href => href(action=>"blob",
1630                                                   hash_base=>$hash,
1631                                                   hash=>$diffinfo->{'to_id'},
1632                                                   file_name=>$diffinfo->{'to_file'}),
1633                                     -class => "path"},
1634                                    esc_path($diffinfo->{'to_file'}));
1635         } else {
1636                 $result .= esc_path($diffinfo->{'to_file'});
1637         }
1638         $result .= "</div>\n" . # class="diff header"
1639                    "<div class=\"diff nodifferences\">" .
1640                    "Simple merge" .
1641                    "</div>\n"; # class="diff nodifferences"
1642
1643         return $result;
1644 }
1645
1646 # format patch (diff) line (not to be used for diff headers)
1647 sub format_diff_line {
1648         my $line = shift;
1649         my ($from, $to) = @_;
1650         my $diff_class = "";
1651
1652         chomp $line;
1653
1654         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1655                 # combined diff
1656                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1657                 if ($line =~ m/^\@{3}/) {
1658                         $diff_class = " chunk_header";
1659                 } elsif ($line =~ m/^\\/) {
1660                         $diff_class = " incomplete";
1661                 } elsif ($prefix =~ tr/+/+/) {
1662                         $diff_class = " add";
1663                 } elsif ($prefix =~ tr/-/-/) {
1664                         $diff_class = " rem";
1665                 }
1666         } else {
1667                 # assume ordinary diff
1668                 my $char = substr($line, 0, 1);
1669                 if ($char eq '+') {
1670                         $diff_class = " add";
1671                 } elsif ($char eq '-') {
1672                         $diff_class = " rem";
1673                 } elsif ($char eq '@') {
1674                         $diff_class = " chunk_header";
1675                 } elsif ($char eq "\\") {
1676                         $diff_class = " incomplete";
1677                 }
1678         }
1679         $line = untabify($line);
1680         if ($from && $to && $line =~ m/^\@{2} /) {
1681                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1682                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1683
1684                 $from_lines = 0 unless defined $from_lines;
1685                 $to_lines   = 0 unless defined $to_lines;
1686
1687                 if ($from->{'href'}) {
1688                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1689                                              -class=>"list"}, $from_text);
1690                 }
1691                 if ($to->{'href'}) {
1692                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1693                                              -class=>"list"}, $to_text);
1694                 }
1695                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1696                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1697                 return "<div class=\"diff$diff_class\">$line</div>\n";
1698         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1699                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1700                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1701
1702                 @from_text = split(' ', $ranges);
1703                 for (my $i = 0; $i < @from_text; ++$i) {
1704                         ($from_start[$i], $from_nlines[$i]) =
1705                                 (split(',', substr($from_text[$i], 1)), 0);
1706                 }
1707
1708                 $to_text   = pop @from_text;
1709                 $to_start  = pop @from_start;
1710                 $to_nlines = pop @from_nlines;
1711
1712                 $line = "<span class=\"chunk_info\">$prefix ";
1713                 for (my $i = 0; $i < @from_text; ++$i) {
1714                         if ($from->{'href'}[$i]) {
1715                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1716                                                   -class=>"list"}, $from_text[$i]);
1717                         } else {
1718                                 $line .= $from_text[$i];
1719                         }
1720                         $line .= " ";
1721                 }
1722                 if ($to->{'href'}) {
1723                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1724                                           -class=>"list"}, $to_text);
1725                 } else {
1726                         $line .= $to_text;
1727                 }
1728                 $line .= " $prefix</span>" .
1729                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1730                 return "<div class=\"diff$diff_class\">$line</div>\n";
1731         }
1732         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1733 }
1734
1735 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1736 # linked.  Pass the hash of the tree/commit to snapshot.
1737 sub format_snapshot_links {
1738         my ($hash) = @_;
1739         my $num_fmts = @snapshot_fmts;
1740         if ($num_fmts > 1) {
1741                 # A parenthesized list of links bearing format names.
1742                 # e.g. "snapshot (_tar.gz_ _zip_)"
1743                 return "snapshot (" . join(' ', map
1744                         $cgi->a({
1745                                 -href => href(
1746                                         action=>"snapshot",
1747                                         hash=>$hash,
1748                                         snapshot_format=>$_
1749                                 )
1750                         }, $known_snapshot_formats{$_}{'display'})
1751                 , @snapshot_fmts) . ")";
1752         } elsif ($num_fmts == 1) {
1753                 # A single "snapshot" link whose tooltip bears the format name.
1754                 # i.e. "_snapshot_"
1755                 my ($fmt) = @snapshot_fmts;
1756                 return
1757                         $cgi->a({
1758                                 -href => href(
1759                                         action=>"snapshot",
1760                                         hash=>$hash,
1761                                         snapshot_format=>$fmt
1762                                 ),
1763                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1764                         }, "snapshot");
1765         } else { # $num_fmts == 0
1766                 return undef;
1767         }
1768 }
1769
1770 ## ......................................................................
1771 ## functions returning values to be passed, perhaps after some
1772 ## transformation, to other functions; e.g. returning arguments to href()
1773
1774 # returns hash to be passed to href to generate gitweb URL
1775 # in -title key it returns description of link
1776 sub get_feed_info {
1777         my $format = shift || 'Atom';
1778         my %res = (action => lc($format));
1779
1780         # feed links are possible only for project views
1781         return unless (defined $project);
1782         # some views should link to OPML, or to generic project feed,
1783         # or don't have specific feed yet (so they should use generic)
1784         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1785
1786         my $branch;
1787         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1788         # from tag links; this also makes possible to detect branch links
1789         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1790             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1791                 $branch = $1;
1792         }
1793         # find log type for feed description (title)
1794         my $type = 'log';
1795         if (defined $file_name) {
1796                 $type  = "history of $file_name";
1797                 $type .= "/" if ($action eq 'tree');
1798                 $type .= " on '$branch'" if (defined $branch);
1799         } else {
1800                 $type = "log of $branch" if (defined $branch);
1801         }
1802
1803         $res{-title} = $type;
1804         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1805         $res{'file_name'} = $file_name;
1806
1807         return %res;
1808 }
1809
1810 ## ----------------------------------------------------------------------
1811 ## git utility subroutines, invoking git commands
1812
1813 # returns path to the core git executable and the --git-dir parameter as list
1814 sub git_cmd {
1815         return $GIT, '--git-dir='.$git_dir;
1816 }
1817
1818 # quote the given arguments for passing them to the shell
1819 # quote_command("command", "arg 1", "arg with ' and ! characters")
1820 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1821 # Try to avoid using this function wherever possible.
1822 sub quote_command {
1823         return join(' ',
1824                     map( { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ ));
1825 }
1826
1827 # get HEAD ref of given project as hash
1828 sub git_get_head_hash {
1829         my $project = shift;
1830         my $o_git_dir = $git_dir;
1831         my $retval = undef;
1832         $git_dir = "$projectroot/$project";
1833         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1834                 my $head = <$fd>;
1835                 close $fd;
1836                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1837                         $retval = $1;
1838                 }
1839         }
1840         if (defined $o_git_dir) {
1841                 $git_dir = $o_git_dir;
1842         }
1843         return $retval;
1844 }
1845
1846 # get type of given object
1847 sub git_get_type {
1848         my $hash = shift;
1849
1850         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1851         my $type = <$fd>;
1852         close $fd or return;
1853         chomp $type;
1854         return $type;
1855 }
1856
1857 # repository configuration
1858 our $config_file = '';
1859 our %config;
1860
1861 # store multiple values for single key as anonymous array reference
1862 # single values stored directly in the hash, not as [ <value> ]
1863 sub hash_set_multi {
1864         my ($hash, $key, $value) = @_;
1865
1866         if (!exists $hash->{$key}) {
1867                 $hash->{$key} = $value;
1868         } elsif (!ref $hash->{$key}) {
1869                 $hash->{$key} = [ $hash->{$key}, $value ];
1870         } else {
1871                 push @{$hash->{$key}}, $value;
1872         }
1873 }
1874
1875 # return hash of git project configuration
1876 # optionally limited to some section, e.g. 'gitweb'
1877 sub git_parse_project_config {
1878         my $section_regexp = shift;
1879         my %config;
1880
1881         local $/ = "\0";
1882
1883         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1884                 or return;
1885
1886         while (my $keyval = <$fh>) {
1887                 chomp $keyval;
1888                 my ($key, $value) = split(/\n/, $keyval, 2);
1889
1890                 hash_set_multi(\%config, $key, $value)
1891                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1892         }
1893         close $fh;
1894
1895         return %config;
1896 }
1897
1898 # convert config value to boolean, 'true' or 'false'
1899 # no value, number > 0, 'true' and 'yes' values are true
1900 # rest of values are treated as false (never as error)
1901 sub config_to_bool {
1902         my $val = shift;
1903
1904         # strip leading and trailing whitespace
1905         $val =~ s/^\s+//;
1906         $val =~ s/\s+$//;
1907
1908         return (!defined $val ||               # section.key
1909                 ($val =~ /^\d+$/ && $val) ||   # section.key = 1
1910                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1911 }
1912
1913 # convert config value to simple decimal number
1914 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1915 # to be multiplied by 1024, 1048576, or 1073741824
1916 sub config_to_int {
1917         my $val = shift;
1918
1919         # strip leading and trailing whitespace
1920         $val =~ s/^\s+//;
1921         $val =~ s/\s+$//;
1922
1923         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1924                 $unit = lc($unit);
1925                 # unknown unit is treated as 1
1926                 return $num * ($unit eq 'g' ? 1073741824 :
1927                                $unit eq 'm' ?    1048576 :
1928                                $unit eq 'k' ?       1024 : 1);
1929         }
1930         return $val;
1931 }
1932
1933 # convert config value to array reference, if needed
1934 sub config_to_multi {
1935         my $val = shift;
1936
1937         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1938 }
1939
1940 sub git_get_project_config {
1941         my ($key, $type) = @_;
1942
1943         # key sanity check
1944         return unless ($key);
1945         $key =~ s/^gitweb\.//;
1946         return if ($key =~ m/\W/);
1947
1948         # type sanity check
1949         if (defined $type) {
1950                 $type =~ s/^--//;
1951                 $type = undef
1952                         unless ($type eq 'bool' || $type eq 'int');
1953         }
1954
1955         # get config
1956         if (!defined $config_file ||
1957             $config_file ne "$git_dir/config") {
1958                 %config = git_parse_project_config('gitweb');
1959                 $config_file = "$git_dir/config";
1960         }
1961
1962         # ensure given type
1963         if (!defined $type) {
1964                 return $config{"gitweb.$key"};
1965         } elsif ($type eq 'bool') {
1966                 # backward compatibility: 'git config --bool' returns true/false
1967                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1968         } elsif ($type eq 'int') {
1969                 return config_to_int($config{"gitweb.$key"});
1970         }
1971         return $config{"gitweb.$key"};
1972 }
1973
1974 # get hash of given path at given ref
1975 sub git_get_hash_by_path {
1976         my $base = shift;
1977         my $path = shift || return undef;
1978         my $type = shift;
1979
1980         $path =~ s,/+$,,;
1981
1982         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1983                 or die_error(500, "Open git-ls-tree failed");
1984         my $line = <$fd>;
1985         close $fd or return undef;
1986
1987         if (!defined $line) {
1988                 # there is no tree or hash given by $path at $base
1989                 return undef;
1990         }
1991
1992         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1993         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1994         if (defined $type && $type ne $2) {
1995                 # type doesn't match
1996                 return undef;
1997         }
1998         return $3;
1999 }
2000
2001 # get path of entry with given hash at given tree-ish (ref)
2002 # used to get 'from' filename for combined diff (merge commit) for renames
2003 sub git_get_path_by_hash {
2004         my $base = shift || return;
2005         my $hash = shift || return;
2006
2007         local $/ = "\0";
2008
2009         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2010                 or return undef;
2011         while (my $line = <$fd>) {
2012                 chomp $line;
2013
2014                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2015                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2016                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2017                         close $fd;
2018                         return $1;
2019                 }
2020         }
2021         close $fd;
2022         return undef;
2023 }
2024
2025 ## ......................................................................
2026 ## git utility functions, directly accessing git repository
2027
2028 sub git_get_project_description {
2029         my $path = shift;
2030
2031         $git_dir = "$projectroot/$path";
2032         open my $fd, "$git_dir/description"
2033                 or return git_get_project_config('description');
2034         my $descr = <$fd>;
2035         close $fd;
2036         if (defined $descr) {
2037                 chomp $descr;
2038         }
2039         return $descr;
2040 }
2041
2042 sub git_get_project_ctags {
2043         my $path = shift;
2044         my $ctags = {};
2045
2046         $git_dir = "$projectroot/$path";
2047         unless (opendir D, "$git_dir/ctags") {
2048                 return $ctags;
2049         }
2050         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir(D)) {
2051                 open CT, $_ or next;
2052                 my $val = <CT>;
2053                 chomp $val;
2054                 close CT;
2055                 my $ctag = $_; $ctag =~ s#.*/##;
2056                 $ctags->{$ctag} = $val;
2057         }
2058         closedir D;
2059         $ctags;
2060 }
2061
2062 sub git_populate_project_tagcloud {
2063         my $ctags = shift;
2064
2065         # First, merge different-cased tags; tags vote on casing
2066         my %ctags_lc;
2067         foreach (keys %$ctags) {
2068                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2069                 if (not $ctags_lc{lc $_}->{topcount}
2070                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2071                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2072                         $ctags_lc{lc $_}->{topname} = $_;
2073                 }
2074         }
2075
2076         my $cloud;
2077         if (eval { require HTML::TagCloud; 1; }) {
2078                 $cloud = HTML::TagCloud->new;
2079                 foreach (sort keys %ctags_lc) {
2080                         # Pad the title with spaces so that the cloud looks
2081                         # less crammed.
2082                         my $title = $ctags_lc{$_}->{topname};
2083                         $title =~ s/ /&nbsp;/g;
2084                         $title =~ s/^/&nbsp;/g;
2085                         $title =~ s/$/&nbsp;/g;
2086                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2087                 }
2088         } else {
2089                 $cloud = \%ctags_lc;
2090         }
2091         $cloud;
2092 }
2093
2094 sub git_show_project_tagcloud {
2095         my ($cloud, $count) = @_;
2096         print STDERR ref($cloud)."..\n";
2097         if (ref $cloud eq 'HTML::TagCloud') {
2098                 return $cloud->html_and_css($count);
2099         } else {
2100                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2101                 return '<p align="center">' . join (', ', map {
2102                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2103                 } splice(@tags, 0, $count)) . '</p>';
2104         }
2105 }
2106
2107 sub git_get_project_url_list {
2108         my $path = shift;
2109
2110         $git_dir = "$projectroot/$path";
2111         open my $fd, "$git_dir/cloneurl"
2112                 or return wantarray ?
2113                 @{ config_to_multi(git_get_project_config('url')) } :
2114                    config_to_multi(git_get_project_config('url'));
2115         my @git_project_url_list = map { chomp; $_ } <$fd>;
2116         close $fd;
2117
2118         return wantarray ? @git_project_url_list : \@git_project_url_list;
2119 }
2120
2121 sub git_get_projects_list {
2122         my ($filter) = @_;
2123         my @list;
2124
2125         $filter ||= '';
2126         $filter =~ s/\.git$//;
2127
2128         my $check_forks = gitweb_check_feature('forks');
2129
2130         if (-d $projects_list) {
2131                 # search in directory
2132                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2133                 # remove the trailing "/"
2134                 $dir =~ s!/+$!!;
2135                 my $pfxlen = length("$dir");
2136                 my $pfxdepth = ($dir =~ tr!/!!);
2137
2138                 File::Find::find({
2139                         follow_fast => 1, # follow symbolic links
2140                         follow_skip => 2, # ignore duplicates
2141                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2142                         wanted => sub {
2143                                 # skip project-list toplevel, if we get it.
2144                                 return if (m!^[/.]$!);
2145                                 # only directories can be git repositories
2146                                 return unless (-d $_);
2147                                 # don't traverse too deep (Find is super slow on os x)
2148                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2149                                         $File::Find::prune = 1;
2150                                         return;
2151                                 }
2152
2153                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2154                                 # we check related file in $projectroot
2155                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2156                                 if (check_export_ok("$projectroot/$path")) {
2157                                         push @list, { path => $path };
2158                                         $File::Find::prune = 1;
2159                                 }
2160                         },
2161                 }, "$dir");
2162
2163         } elsif (-f $projects_list) {
2164                 # read from file(url-encoded):
2165                 # 'git%2Fgit.git Linus+Torvalds'
2166                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2167                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2168                 my %paths;
2169                 open my ($fd), $projects_list or return;
2170         PROJECT:
2171                 while (my $line = <$fd>) {
2172                         chomp $line;
2173                         my ($path, $owner) = split ' ', $line;
2174                         $path = unescape($path);
2175                         $owner = unescape($owner);
2176                         if (!defined $path) {
2177                                 next;
2178                         }
2179                         if ($filter ne '') {
2180                                 # looking for forks;
2181                                 my $pfx = substr($path, 0, length($filter));
2182                                 if ($pfx ne $filter) {
2183                                         next PROJECT;
2184                                 }
2185                                 my $sfx = substr($path, length($filter));
2186                                 if ($sfx !~ /^\/.*\.git$/) {
2187                                         next PROJECT;
2188                                 }
2189                         } elsif ($check_forks) {
2190                         PATH:
2191                                 foreach my $filter (keys %paths) {
2192                                         # looking for forks;
2193                                         my $pfx = substr($path, 0, length($filter));
2194                                         if ($pfx ne $filter) {
2195                                                 next PATH;
2196                                         }
2197                                         my $sfx = substr($path, length($filter));
2198                                         if ($sfx !~ /^\/.*\.git$/) {
2199                                                 next PATH;
2200                                         }
2201                                         # is a fork, don't include it in
2202                                         # the list
2203                                         next PROJECT;
2204                                 }
2205                         }
2206                         if (check_export_ok("$projectroot/$path")) {
2207                                 my $pr = {
2208                                         path => $path,
2209                                         owner => to_utf8($owner),
2210                                 };
2211                                 push @list, $pr;
2212                                 (my $forks_path = $path) =~ s/\.git$//;
2213                                 $paths{$forks_path}++;
2214                         }
2215                 }
2216                 close $fd;
2217         }
2218         return @list;
2219 }
2220
2221 our $gitweb_project_owner = undef;
2222 sub git_get_project_list_from_file {
2223
2224         return if (defined $gitweb_project_owner);
2225
2226         $gitweb_project_owner = {};
2227         # read from file (url-encoded):
2228         # 'git%2Fgit.git Linus+Torvalds'
2229         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2230         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2231         if (-f $projects_list) {
2232                 open (my $fd , $projects_list);
2233                 while (my $line = <$fd>) {
2234                         chomp $line;
2235                         my ($pr, $ow) = split ' ', $line;
2236                         $pr = unescape($pr);
2237                         $ow = unescape($ow);
2238                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2239                 }
2240                 close $fd;
2241         }
2242 }
2243
2244 sub git_get_project_owner {
2245         my $project = shift;
2246         my $owner;
2247
2248         return undef unless $project;
2249         $git_dir = "$projectroot/$project";
2250
2251         if (!defined $gitweb_project_owner) {
2252                 git_get_project_list_from_file();
2253         }
2254
2255         if (exists $gitweb_project_owner->{$project}) {
2256                 $owner = $gitweb_project_owner->{$project};
2257         }
2258         if (!defined $owner){
2259                 $owner = git_get_project_config('owner');
2260         }
2261         if (!defined $owner) {
2262                 $owner = get_file_owner("$git_dir");
2263         }
2264
2265         return $owner;
2266 }
2267
2268 sub git_get_last_activity {
2269         my ($path) = @_;
2270         my $fd;
2271
2272         $git_dir = "$projectroot/$path";
2273         open($fd, "-|", git_cmd(), 'for-each-ref',
2274              '--format=%(committer)',
2275              '--sort=-committerdate',
2276              '--count=1',
2277              'refs/heads') or return;
2278         my $most_recent = <$fd>;
2279         close $fd or return;
2280         if (defined $most_recent &&
2281             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2282                 my $timestamp = $1;
2283                 my $age = time - $timestamp;
2284                 return ($age, age_string($age));
2285         }
2286         return (undef, undef);
2287 }
2288
2289 sub git_get_references {
2290         my $type = shift || "";
2291         my %refs;
2292         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2293         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2294         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2295                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2296                 or return;
2297
2298         while (my $line = <$fd>) {
2299                 chomp $line;
2300                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2301                         if (defined $refs{$1}) {
2302                                 push @{$refs{$1}}, $2;
2303                         } else {
2304                                 $refs{$1} = [ $2 ];
2305                         }
2306                 }
2307         }
2308         close $fd or return;
2309         return \%refs;
2310 }
2311
2312 sub git_get_rev_name_tags {
2313         my $hash = shift || return undef;
2314
2315         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2316                 or return;
2317         my $name_rev = <$fd>;
2318         close $fd;
2319
2320         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2321                 return $1;
2322         } else {
2323                 # catches also '$hash undefined' output
2324                 return undef;
2325         }
2326 }
2327
2328 ## ----------------------------------------------------------------------
2329 ## parse to hash functions
2330
2331 sub parse_date {
2332         my $epoch = shift;
2333         my $tz = shift || "-0000";
2334
2335         my %date;
2336         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2337         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2338         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2339         $date{'hour'} = $hour;
2340         $date{'minute'} = $min;
2341         $date{'mday'} = $mday;
2342         $date{'day'} = $days[$wday];
2343         $date{'month'} = $months[$mon];
2344         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2345                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2346         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2347                              $mday, $months[$mon], $hour ,$min;
2348         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2349                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2350
2351         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2352         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2353         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2354         $date{'hour_local'} = $hour;
2355         $date{'minute_local'} = $min;
2356         $date{'tz_local'} = $tz;
2357         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2358                                   1900+$year, $mon+1, $mday,
2359                                   $hour, $min, $sec, $tz);
2360         return %date;
2361 }
2362
2363 sub parse_tag {
2364         my $tag_id = shift;
2365         my %tag;
2366         my @comment;
2367
2368         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2369         $tag{'id'} = $tag_id;
2370         while (my $line = <$fd>) {
2371                 chomp $line;
2372                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2373                         $tag{'object'} = $1;
2374                 } elsif ($line =~ m/^type (.+)$/) {
2375                         $tag{'type'} = $1;
2376                 } elsif ($line =~ m/^tag (.+)$/) {
2377                         $tag{'name'} = $1;
2378                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2379                         $tag{'author'} = $1;
2380                         $tag{'epoch'} = $2;
2381                         $tag{'tz'} = $3;
2382                 } elsif ($line =~ m/--BEGIN/) {
2383                         push @comment, $line;
2384                         last;
2385                 } elsif ($line eq "") {
2386                         last;
2387                 }
2388         }
2389         push @comment, <$fd>;
2390         $tag{'comment'} = \@comment;
2391         close $fd or return;
2392         if (!defined $tag{'name'}) {
2393                 return
2394         };
2395         return %tag
2396 }
2397
2398 sub parse_commit_text {
2399         my ($commit_text, $withparents) = @_;
2400         my @commit_lines = split '\n', $commit_text;
2401         my %co;
2402
2403         pop @commit_lines; # Remove '\0'
2404
2405         if (! @commit_lines) {
2406                 return;
2407         }
2408
2409         my $header = shift @commit_lines;
2410         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2411                 return;
2412         }
2413         ($co{'id'}, my @parents) = split ' ', $header;
2414         while (my $line = shift @commit_lines) {
2415                 last if $line eq "\n";
2416                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2417                         $co{'tree'} = $1;
2418                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2419                         push @parents, $1;
2420                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2421                         $co{'author'} = $1;
2422                         $co{'author_epoch'} = $2;
2423                         $co{'author_tz'} = $3;
2424                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2425                                 $co{'author_name'}  = $1;
2426                                 $co{'author_email'} = $2;
2427                         } else {
2428                                 $co{'author_name'} = $co{'author'};
2429                         }
2430                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2431                         $co{'committer'} = $1;
2432                         $co{'committer_epoch'} = $2;
2433                         $co{'committer_tz'} = $3;
2434                         $co{'committer_name'} = $co{'committer'};
2435                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2436                                 $co{'committer_name'}  = $1;
2437                                 $co{'committer_email'} = $2;
2438                         } else {
2439                                 $co{'committer_name'} = $co{'committer'};
2440                         }
2441                 }
2442         }
2443         if (!defined $co{'tree'}) {
2444                 return;
2445         };
2446         $co{'parents'} = \@parents;
2447         $co{'parent'} = $parents[0];
2448
2449         foreach my $title (@commit_lines) {
2450                 $title =~ s/^    //;
2451                 if ($title ne "") {
2452                         $co{'title'} = chop_str($title, 80, 5);
2453                         # remove leading stuff of merges to make the interesting part visible
2454                         if (length($title) > 50) {
2455                                 $title =~ s/^Automatic //;
2456                                 $title =~ s/^merge (of|with) /Merge ... /i;
2457                                 if (length($title) > 50) {
2458                                         $title =~ s/(http|rsync):\/\///;
2459                                 }
2460                                 if (length($title) > 50) {
2461                                         $title =~ s/(master|www|rsync)\.//;
2462                                 }
2463                                 if (length($title) > 50) {
2464                                         $title =~ s/kernel.org:?//;
2465                                 }
2466                                 if (length($title) > 50) {
2467                                         $title =~ s/\/pub\/scm//;
2468                                 }
2469                         }
2470                         $co{'title_short'} = chop_str($title, 50, 5);
2471                         last;
2472                 }
2473         }
2474         if (! defined $co{'title'} || $co{'title'} eq "") {
2475                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2476         }
2477         # remove added spaces
2478         foreach my $line (@commit_lines) {
2479                 $line =~ s/^    //;
2480         }
2481         $co{'comment'} = \@commit_lines;
2482
2483         my $age = time - $co{'committer_epoch'};
2484         $co{'age'} = $age;
2485         $co{'age_string'} = age_string($age);
2486         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2487         if ($age > 60*60*24*7*2) {
2488                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2489                 $co{'age_string_age'} = $co{'age_string'};
2490         } else {
2491                 $co{'age_string_date'} = $co{'age_string'};
2492                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2493         }
2494         return %co;
2495 }
2496
2497 sub parse_commit {
2498         my ($commit_id) = @_;
2499         my %co;
2500
2501         local $/ = "\0";
2502
2503         open my $fd, "-|", git_cmd(), "rev-list",
2504                 "--parents",
2505                 "--header",
2506                 "--max-count=1",
2507                 $commit_id,
2508                 "--",
2509                 or die_error(500, "Open git-rev-list failed");
2510         %co = parse_commit_text(<$fd>, 1);
2511         close $fd;
2512
2513         return %co;
2514 }
2515
2516 sub parse_commits {
2517         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2518         my @cos;
2519
2520         $maxcount ||= 1;
2521         $skip ||= 0;
2522
2523         local $/ = "\0";
2524
2525         open my $fd, "-|", git_cmd(), "rev-list",
2526                 "--header",
2527                 @args,
2528                 ("--max-count=" . $maxcount),
2529                 ("--skip=" . $skip),
2530                 @extra_options,
2531                 $commit_id,
2532                 "--",
2533                 ($filename ? ($filename) : ())
2534                 or die_error(500, "Open git-rev-list failed");
2535         while (my $line = <$fd>) {
2536                 my %co = parse_commit_text($line);
2537                 push @cos, \%co;
2538         }
2539         close $fd;
2540
2541         return wantarray ? @cos : \@cos;
2542 }
2543
2544 # parse line of git-diff-tree "raw" output
2545 sub parse_difftree_raw_line {
2546         my $line = shift;
2547         my %res;
2548
2549         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2550         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2551         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2552                 $res{'from_mode'} = $1;
2553                 $res{'to_mode'} = $2;
2554                 $res{'from_id'} = $3;
2555                 $res{'to_id'} = $4;
2556                 $res{'status'} = $5;
2557                 $res{'similarity'} = $6;
2558                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2559                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2560                 } else {
2561                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2562                 }
2563         }
2564         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2565         # combined diff (for merge commit)
2566         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2567                 $res{'nparents'}  = length($1);
2568                 $res{'from_mode'} = [ split(' ', $2) ];
2569                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2570                 $res{'from_id'} = [ split(' ', $3) ];
2571                 $res{'to_id'} = pop @{$res{'from_id'}};
2572                 $res{'status'} = [ split('', $4) ];
2573                 $res{'to_file'} = unquote($5);
2574         }
2575         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2576         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2577                 $res{'commit'} = $1;
2578         }
2579
2580         return wantarray ? %res : \%res;
2581 }
2582
2583 # wrapper: return parsed line of git-diff-tree "raw" output
2584 # (the argument might be raw line, or parsed info)
2585 sub parsed_difftree_line {
2586         my $line_or_ref = shift;
2587
2588         if (ref($line_or_ref) eq "HASH") {
2589                 # pre-parsed (or generated by hand)
2590                 return $line_or_ref;
2591         } else {
2592                 return parse_difftree_raw_line($line_or_ref);
2593         }
2594 }
2595
2596 # parse line of git-ls-tree output
2597 sub parse_ls_tree_line ($;%) {
2598         my $line = shift;
2599         my %opts = @_;
2600         my %res;
2601
2602         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2603         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2604
2605         $res{'mode'} = $1;
2606         $res{'type'} = $2;
2607         $res{'hash'} = $3;
2608         if ($opts{'-z'}) {
2609                 $res{'name'} = $4;
2610         } else {
2611                 $res{'name'} = unquote($4);
2612         }
2613
2614         return wantarray ? %res : \%res;
2615 }
2616
2617 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2618 sub parse_from_to_diffinfo {
2619         my ($diffinfo, $from, $to, @parents) = @_;
2620
2621         if ($diffinfo->{'nparents'}) {
2622                 # combined diff
2623                 $from->{'file'} = [];
2624                 $from->{'href'} = [];
2625                 fill_from_file_info($diffinfo, @parents)
2626                         unless exists $diffinfo->{'from_file'};
2627                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2628                         $from->{'file'}[$i] =
2629                                 defined $diffinfo->{'from_file'}[$i] ?
2630                                         $diffinfo->{'from_file'}[$i] :
2631                                         $diffinfo->{'to_file'};
2632                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2633                                 $from->{'href'}[$i] = href(action=>"blob",
2634                                                            hash_base=>$parents[$i],
2635                                                            hash=>$diffinfo->{'from_id'}[$i],
2636                                                            file_name=>$from->{'file'}[$i]);
2637                         } else {
2638                                 $from->{'href'}[$i] = undef;
2639                         }
2640                 }
2641         } else {
2642                 # ordinary (not combined) diff
2643                 $from->{'file'} = $diffinfo->{'from_file'};
2644                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2645                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2646                                                hash=>$diffinfo->{'from_id'},
2647                                                file_name=>$from->{'file'});
2648                 } else {
2649                         delete $from->{'href'};
2650                 }
2651         }
2652
2653         $to->{'file'} = $diffinfo->{'to_file'};
2654         if (!is_deleted($diffinfo)) { # file exists in result
2655                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2656                                      hash=>$diffinfo->{'to_id'},
2657                                      file_name=>$to->{'file'});
2658         } else {
2659                 delete $to->{'href'};
2660         }
2661 }
2662
2663 ## ......................................................................
2664 ## parse to array of hashes functions
2665
2666 sub git_get_heads_list {
2667         my $limit = shift;
2668         my @headslist;
2669
2670         open my $fd, '-|', git_cmd(), 'for-each-ref',
2671                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2672                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2673                 'refs/heads'
2674                 or return;
2675         while (my $line = <$fd>) {
2676                 my %ref_item;
2677
2678                 chomp $line;
2679                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2680                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2681                 my ($committer, $epoch, $tz) =
2682                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2683                 $ref_item{'fullname'}  = $name;
2684                 $name =~ s!^refs/heads/!!;
2685
2686                 $ref_item{'name'}  = $name;
2687                 $ref_item{'id'}    = $hash;
2688                 $ref_item{'title'} = $title || '(no commit message)';
2689                 $ref_item{'epoch'} = $epoch;
2690                 if ($epoch) {
2691                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2692                 } else {
2693                         $ref_item{'age'} = "unknown";
2694                 }
2695
2696                 push @headslist, \%ref_item;
2697         }
2698         close $fd;
2699
2700         return wantarray ? @headslist : \@headslist;
2701 }
2702
2703 sub git_get_tags_list {
2704         my $limit = shift;
2705         my @tagslist;
2706
2707         open my $fd, '-|', git_cmd(), 'for-each-ref',
2708                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2709                 '--format=%(objectname) %(objecttype) %(refname) '.
2710                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2711                 'refs/tags'
2712                 or return;
2713         while (my $line = <$fd>) {
2714                 my %ref_item;
2715
2716                 chomp $line;
2717                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2718                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2719                 my ($creator, $epoch, $tz) =
2720                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2721                 $ref_item{'fullname'} = $name;
2722                 $name =~ s!^refs/tags/!!;
2723
2724                 $ref_item{'type'} = $type;
2725                 $ref_item{'id'} = $id;
2726                 $ref_item{'name'} = $name;
2727                 if ($type eq "tag") {
2728                         $ref_item{'subject'} = $title;
2729                         $ref_item{'reftype'} = $reftype;
2730                         $ref_item{'refid'}   = $refid;
2731                 } else {
2732                         $ref_item{'reftype'} = $type;
2733                         $ref_item{'refid'}   = $id;
2734                 }
2735
2736                 if ($type eq "tag" || $type eq "commit") {
2737                         $ref_item{'epoch'} = $epoch;
2738                         if ($epoch) {
2739                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2740                         } else {
2741                                 $ref_item{'age'} = "unknown";
2742                         }
2743                 }
2744
2745                 push @tagslist, \%ref_item;
2746         }
2747         close $fd;
2748
2749         return wantarray ? @tagslist : \@tagslist;
2750 }
2751
2752 ## ----------------------------------------------------------------------
2753 ## filesystem-related functions
2754
2755 sub get_file_owner {
2756         my $path = shift;
2757
2758         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2759         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2760         if (!defined $gcos) {
2761                 return undef;
2762         }
2763         my $owner = $gcos;
2764         $owner =~ s/[,;].*$//;
2765         return to_utf8($owner);
2766 }
2767
2768 # assume that file exists
2769 sub insert_file {
2770         my $filename = shift;
2771
2772         open my $fd, '<', $filename;
2773         print map { to_utf8($_) } <$fd>;
2774         close $fd;
2775 }
2776
2777 ## ......................................................................
2778 ## mimetype related functions
2779
2780 sub mimetype_guess_file {
2781         my $filename = shift;
2782         my $mimemap = shift;
2783         -r $mimemap or return undef;
2784
2785         my %mimemap;
2786         open(MIME, $mimemap) or return undef;
2787         while (<MIME>) {
2788                 next if m/^#/; # skip comments
2789                 my ($mime, $exts) = split(/\t+/);
2790                 if (defined $exts) {
2791                         my @exts = split(/\s+/, $exts);
2792                         foreach my $ext (@exts) {
2793                                 $mimemap{$ext} = $mime;
2794                         }
2795                 }
2796         }
2797         close(MIME);
2798
2799         $filename =~ /\.([^.]*)$/;
2800         return $mimemap{$1};
2801 }
2802
2803 sub mimetype_guess {
2804         my $filename = shift;
2805         my $mime;
2806         $filename =~ /\./ or return undef;
2807
2808         if ($mimetypes_file) {
2809                 my $file = $mimetypes_file;
2810                 if ($file !~ m!^/!) { # if it is relative path
2811                         # it is relative to project
2812                         $file = "$projectroot/$project/$file";
2813                 }
2814                 $mime = mimetype_guess_file($filename, $file);
2815         }
2816         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2817         return $mime;
2818 }
2819
2820 sub blob_mimetype {
2821         my $fd = shift;
2822         my $filename = shift;
2823
2824         if ($filename) {
2825                 my $mime = mimetype_guess($filename);
2826                 $mime and return $mime;
2827         }
2828
2829         # just in case
2830         return $default_blob_plain_mimetype unless $fd;
2831
2832         if (-T $fd) {
2833                 return 'text/plain';
2834         } elsif (! $filename) {
2835                 return 'application/octet-stream';
2836         } elsif ($filename =~ m/\.png$/i) {
2837                 return 'image/png';
2838         } elsif ($filename =~ m/\.gif$/i) {
2839                 return 'image/gif';
2840         } elsif ($filename =~ m/\.jpe?g$/i) {
2841                 return 'image/jpeg';
2842         } else {
2843                 return 'application/octet-stream';
2844         }
2845 }
2846
2847 sub blob_contenttype {
2848         my ($fd, $file_name, $type) = @_;
2849
2850         $type ||= blob_mimetype($fd, $file_name);
2851         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
2852                 $type .= "; charset=$default_text_plain_charset";
2853         }
2854
2855         return $type;
2856 }
2857
2858 ## ======================================================================
2859 ## functions printing HTML: header, footer, error page
2860
2861 sub git_header_html {
2862         my $status = shift || "200 OK";
2863         my $expires = shift;
2864
2865         my $title = "$site_name";
2866         if (defined $project) {
2867                 $title .= " - " . to_utf8($project);
2868                 if (defined $action) {
2869                         $title .= "/$action";
2870                         if (defined $file_name) {
2871                                 $title .= " - " . esc_path($file_name);
2872                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2873                                         $title .= "/";
2874                                 }
2875                         }
2876                 }
2877         }
2878         my $content_type;
2879         # require explicit support from the UA if we are to send the page as
2880         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2881         # we have to do this because MSIE sometimes globs '*/*', pretending to
2882         # support xhtml+xml but choking when it gets what it asked for.
2883         if (defined $cgi->http('HTTP_ACCEPT') &&
2884             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2885             $cgi->Accept('application/xhtml+xml') != 0) {
2886                 $content_type = 'application/xhtml+xml';
2887         } else {
2888                 $content_type = 'text/html';
2889         }
2890         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2891                            -status=> $status, -expires => $expires);
2892         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2893         print <<EOF;
2894 <?xml version="1.0" encoding="utf-8"?>
2895 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2896 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2897 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2898 <!-- git core binaries version $git_version -->
2899 <head>
2900 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2901 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2902 <meta name="robots" content="index, nofollow"/>
2903 <title>$title</title>
2904 EOF
2905 # print out each stylesheet that exist
2906         if (defined $stylesheet) {
2907 #provides backwards capability for those people who define style sheet in a config file
2908                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2909         } else {
2910                 foreach my $stylesheet (@stylesheets) {
2911                         next unless $stylesheet;
2912                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2913                 }
2914         }
2915         if (defined $project) {
2916                 my %href_params = get_feed_info();
2917                 if (!exists $href_params{'-title'}) {
2918                         $href_params{'-title'} = 'log';
2919                 }
2920
2921                 foreach my $format qw(RSS Atom) {
2922                         my $type = lc($format);
2923                         my %link_attr = (
2924                                 '-rel' => 'alternate',
2925                                 '-title' => "$project - $href_params{'-title'} - $format feed",
2926                                 '-type' => "application/$type+xml"
2927                         );
2928
2929                         $href_params{'action'} = $type;
2930                         $link_attr{'-href'} = href(%href_params);
2931                         print "<link ".
2932                               "rel=\"$link_attr{'-rel'}\" ".
2933                               "title=\"$link_attr{'-title'}\" ".
2934                               "href=\"$link_attr{'-href'}\" ".
2935                               "type=\"$link_attr{'-type'}\" ".
2936                               "/>\n";
2937
2938                         $href_params{'extra_options'} = '--no-merges';
2939                         $link_attr{'-href'} = href(%href_params);
2940                         $link_attr{'-title'} .= ' (no merges)';
2941                         print "<link ".
2942                               "rel=\"$link_attr{'-rel'}\" ".
2943                               "title=\"$link_attr{'-title'}\" ".
2944                               "href=\"$link_attr{'-href'}\" ".
2945                               "type=\"$link_attr{'-type'}\" ".
2946                               "/>\n";
2947                 }
2948
2949         } else {
2950                 printf('<link rel="alternate" title="%s projects list" '.
2951                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
2952                        $site_name, href(project=>undef, action=>"project_index"));
2953                 printf('<link rel="alternate" title="%s projects feeds" '.
2954                        'href="%s" type="text/x-opml" />'."\n",
2955                        $site_name, href(project=>undef, action=>"opml"));
2956         }
2957         if (defined $favicon) {
2958                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
2959         }
2960
2961         print "</head>\n" .
2962               "<body>\n";
2963
2964         if (-f $site_header) {
2965                 insert_file($site_header);
2966         }
2967
2968         print "<div class=\"page_header\">\n" .
2969               $cgi->a({-href => esc_url($logo_url),
2970                        -title => $logo_label},
2971                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2972         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2973         if (defined $project) {
2974                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2975                 if (defined $action) {
2976                         print " / $action";
2977                 }
2978                 print "\n";
2979         }
2980         print "</div>\n";
2981
2982         my $have_search = gitweb_check_feature('search');
2983         if (defined $project && $have_search) {
2984                 if (!defined $searchtext) {
2985                         $searchtext = "";
2986                 }
2987                 my $search_hash;
2988                 if (defined $hash_base) {
2989                         $search_hash = $hash_base;
2990                 } elsif (defined $hash) {
2991                         $search_hash = $hash;
2992                 } else {
2993                         $search_hash = "HEAD";
2994                 }
2995                 my $action = $my_uri;
2996                 my $use_pathinfo = gitweb_check_feature('pathinfo');
2997                 if ($use_pathinfo) {
2998                         $action .= "/".esc_url($project);
2999                 }
3000                 print $cgi->startform(-method => "get", -action => $action) .
3001                       "<div class=\"search\">\n" .
3002                       (!$use_pathinfo &&
3003                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3004                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3005                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3006                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3007                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3008                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3009                       " search:\n",
3010                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3011                       "<span title=\"Extended regular expression\">" .
3012                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3013                                      -checked => $search_use_regexp) .
3014                       "</span>" .
3015                       "</div>" .
3016                       $cgi->end_form() . "\n";
3017         }
3018 }
3019
3020 sub git_footer_html {
3021         my $feed_class = 'rss_logo';
3022
3023         print "<div class=\"page_footer\">\n";
3024         if (defined $project) {
3025                 my $descr = git_get_project_description($project);
3026                 if (defined $descr) {
3027                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3028                 }
3029
3030                 my %href_params = get_feed_info();
3031                 if (!%href_params) {
3032                         $feed_class .= ' generic';
3033                 }
3034                 $href_params{'-title'} ||= 'log';
3035
3036                 foreach my $format qw(RSS Atom) {
3037                         $href_params{'action'} = lc($format);
3038                         print $cgi->a({-href => href(%href_params),
3039                                       -title => "$href_params{'-title'} $format feed",
3040                                       -class => $feed_class}, $format)."\n";
3041                 }
3042
3043         } else {
3044                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3045                               -class => $feed_class}, "OPML") . " ";
3046                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3047                               -class => $feed_class}, "TXT") . "\n";
3048         }
3049         print "</div>\n"; # class="page_footer"
3050
3051         if (-f $site_footer) {
3052                 insert_file($site_footer);
3053         }
3054
3055         print "</body>\n" .
3056               "</html>";
3057 }
3058
3059 # die_error(<http_status_code>, <error_message>)
3060 # Example: die_error(404, 'Hash not found')
3061 # By convention, use the following status codes (as defined in RFC 2616):
3062 # 400: Invalid or missing CGI parameters, or
3063 #      requested object exists but has wrong type.
3064 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3065 #      this server or project.
3066 # 404: Requested object/revision/project doesn't exist.
3067 # 500: The server isn't configured properly, or
3068 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3069 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3070 sub die_error {
3071         my $status = shift || 500;
3072         my $error = shift || "Internal server error";
3073
3074         my %http_responses = (400 => '400 Bad Request',
3075                               403 => '403 Forbidden',
3076                               404 => '404 Not Found',
3077                               500 => '500 Internal Server Error');
3078         git_header_html($http_responses{$status});
3079         print <<EOF;
3080 <div class="page_body">
3081 <br /><br />
3082 $status - $error
3083 <br />
3084 </div>
3085 EOF
3086         git_footer_html();
3087         exit;
3088 }
3089
3090 ## ----------------------------------------------------------------------
3091 ## functions printing or outputting HTML: navigation
3092
3093 sub git_print_page_nav {
3094         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3095         $extra = '' if !defined $extra; # pager or formats
3096
3097         my @navs = qw(summary shortlog log commit commitdiff tree);
3098         if ($suppress) {
3099                 @navs = grep { $_ ne $suppress } @navs;
3100         }
3101
3102         my %arg = map { $_ => {action=>$_} } @navs;
3103         if (defined $head) {
3104                 for (qw(commit commitdiff)) {
3105                         $arg{$_}{'hash'} = $head;
3106                 }
3107                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3108                         for (qw(shortlog log)) {
3109                                 $arg{$_}{'hash'} = $head;
3110                         }
3111                 }
3112         }
3113
3114         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3115         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3116
3117         my @actions = gitweb_get_feature('actions');
3118         my %repl = (
3119                 '%' => '%',
3120                 'n' => $project,         # project name
3121                 'f' => $git_dir,         # project path within filesystem
3122                 'h' => $treehead || '',  # current hash ('h' parameter)
3123                 'b' => $treebase || '',  # hash base ('hb' parameter)
3124         );
3125         while (@actions) {
3126                 my ($label, $link, $pos) = splice(@actions,0,3);
3127                 # insert
3128                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3129                 # munch munch
3130                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3131                 $arg{$label}{'_href'} = $link;
3132         }
3133
3134         print "<div class=\"page_nav\">\n" .
3135                 (join " | ",
3136                  map { $_ eq $current ?
3137                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3138                  } @navs);
3139         print "<br/>\n$extra<br/>\n" .
3140               "</div>\n";
3141 }
3142
3143 sub format_paging_nav {
3144         my ($action, $hash, $head, $page, $has_next_link) = @_;
3145         my $paging_nav;
3146
3147
3148         if ($hash ne $head || $page) {
3149                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3150         } else {
3151                 $paging_nav .= "HEAD";
3152         }
3153
3154         if ($page > 0) {
3155                 $paging_nav .= " &sdot; " .
3156                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3157                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3158         } else {
3159                 $paging_nav .= " &sdot; prev";
3160         }
3161
3162         if ($has_next_link) {
3163                 $paging_nav .= " &sdot; " .
3164                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3165                                  -accesskey => "n", -title => "Alt-n"}, "next");
3166         } else {
3167                 $paging_nav .= " &sdot; next";
3168         }
3169
3170         return $paging_nav;
3171 }
3172
3173 ## ......................................................................
3174 ## functions printing or outputting HTML: div
3175
3176 sub git_print_header_div {
3177         my ($action, $title, $hash, $hash_base) = @_;
3178         my %args = ();
3179
3180         $args{'action'} = $action;
3181         $args{'hash'} = $hash if $hash;
3182         $args{'hash_base'} = $hash_base if $hash_base;
3183
3184         print "<div class=\"header\">\n" .
3185               $cgi->a({-href => href(%args), -class => "title"},
3186               $title ? $title : $action) .
3187               "\n</div>\n";
3188 }
3189
3190 #sub git_print_authorship (\%) {
3191 sub git_print_authorship {
3192         my $co = shift;
3193
3194         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3195         print "<div class=\"author_date\">" .
3196               esc_html($co->{'author_name'}) .
3197               " [$ad{'rfc2822'}";
3198         if ($ad{'hour_local'} < 6) {
3199                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3200                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3201         } else {
3202                 printf(" (%02d:%02d %s)",
3203                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3204         }
3205         print "]</div>\n";
3206 }
3207
3208 sub git_print_page_path {
3209         my $name = shift;
3210         my $type = shift;
3211         my $hb = shift;
3212
3213
3214         print "<div class=\"page_path\">";
3215         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3216                       -title => 'tree root'}, to_utf8("[$project]"));
3217         print " / ";
3218         if (defined $name) {
3219                 my @dirname = split '/', $name;
3220                 my $basename = pop @dirname;
3221                 my $fullname = '';
3222
3223                 foreach my $dir (@dirname) {
3224                         $fullname .= ($fullname ? '/' : '') . $dir;
3225                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3226                                                      hash_base=>$hb),
3227                                       -title => $fullname}, esc_path($dir));
3228                         print " / ";
3229                 }
3230                 if (defined $type && $type eq 'blob') {
3231                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3232                                                      hash_base=>$hb),
3233                                       -title => $name}, esc_path($basename));
3234                 } elsif (defined $type && $type eq 'tree') {
3235                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3236                                                      hash_base=>$hb),
3237                                       -title => $name}, esc_path($basename));
3238                         print " / ";
3239                 } else {
3240                         print esc_path($basename);
3241                 }
3242         }
3243         print "<br/></div>\n";
3244 }
3245
3246 # sub git_print_log (\@;%) {
3247 sub git_print_log ($;%) {
3248         my $log = shift;
3249         my %opts = @_;
3250
3251         if ($opts{'-remove_title'}) {
3252                 # remove title, i.e. first line of log
3253                 shift @$log;
3254         }
3255         # remove leading empty lines
3256         while (defined $log->[0] && $log->[0] eq "") {
3257                 shift @$log;
3258         }
3259
3260         # print log
3261         my $signoff = 0;
3262         my $empty = 0;
3263         foreach my $line (@$log) {
3264                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3265                         $signoff = 1;
3266                         $empty = 0;
3267                         if (! $opts{'-remove_signoff'}) {
3268                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3269                                 next;
3270                         } else {
3271                                 # remove signoff lines
3272                                 next;
3273                         }
3274                 } else {
3275                         $signoff = 0;
3276                 }
3277
3278                 # print only one empty line
3279                 # do not print empty line after signoff
3280                 if ($line eq "") {
3281                         next if ($empty || $signoff);
3282                         $empty = 1;
3283                 } else {
3284                         $empty = 0;
3285                 }
3286
3287                 print format_log_line_html($line) . "<br/>\n";
3288         }
3289
3290         if ($opts{'-final_empty_line'}) {
3291                 # end with single empty line
3292                 print "<br/>\n" unless $empty;
3293         }
3294 }
3295
3296 # return link target (what link points to)
3297 sub git_get_link_target {
3298         my $hash = shift;
3299         my $link_target;
3300
3301         # read link
3302         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3303                 or return;
3304         {
3305                 local $/;
3306                 $link_target = <$fd>;
3307         }
3308         close $fd
3309                 or return;
3310
3311         return $link_target;
3312 }
3313
3314 # given link target, and the directory (basedir) the link is in,
3315 # return target of link relative to top directory (top tree);
3316 # return undef if it is not possible (including absolute links).
3317 sub normalize_link_target {
3318         my ($link_target, $basedir, $hash_base) = @_;
3319
3320         # we can normalize symlink target only if $hash_base is provided
3321         return unless $hash_base;
3322
3323         # absolute symlinks (beginning with '/') cannot be normalized
3324         return if (substr($link_target, 0, 1) eq '/');
3325
3326         # normalize link target to path from top (root) tree (dir)
3327         my $path;
3328         if ($basedir) {
3329                 $path = $basedir . '/' . $link_target;
3330         } else {
3331                 # we are in top (root) tree (dir)
3332                 $path = $link_target;
3333         }
3334
3335         # remove //, /./, and /../
3336         my @path_parts;
3337         foreach my $part (split('/', $path)) {
3338                 # discard '.' and ''
3339                 next if (!$part || $part eq '.');
3340                 # handle '..'
3341                 if ($part eq '..') {
3342                         if (@path_parts) {
3343                                 pop @path_parts;
3344                         } else {
3345                                 # link leads outside repository (outside top dir)
3346                                 return;
3347                         }
3348                 } else {
3349                         push @path_parts, $part;
3350                 }
3351         }
3352         $path = join('/', @path_parts);
3353
3354         return $path;
3355 }
3356
3357 # print tree entry (row of git_tree), but without encompassing <tr> element
3358 sub git_print_tree_entry {
3359         my ($t, $basedir, $hash_base, $have_blame) = @_;
3360
3361         my %base_key = ();
3362         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3363
3364         # The format of a table row is: mode list link.  Where mode is
3365         # the mode of the entry, list is the name of the entry, an href,
3366         # and link is the action links of the entry.
3367
3368         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3369         if ($t->{'type'} eq "blob") {
3370                 print "<td class=\"list\">" .
3371                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3372                                                file_name=>"$basedir$t->{'name'}", %base_key),
3373                                 -class => "list"}, esc_path($t->{'name'}));
3374                 if (S_ISLNK(oct $t->{'mode'})) {
3375                         my $link_target = git_get_link_target($t->{'hash'});
3376                         if ($link_target) {
3377                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
3378                                 if (defined $norm_target) {
3379                                         print " -> " .
3380                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3381                                                                      file_name=>$norm_target),
3382                                                        -title => $norm_target}, esc_path($link_target));
3383                                 } else {
3384                                         print " -> " . esc_path($link_target);
3385                                 }
3386                         }
3387                 }
3388                 print "</td>\n";
3389                 print "<td class=\"link\">";
3390                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3391                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3392                               "blob");
3393                 if ($have_blame) {
3394                         print " | " .
3395                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3396                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3397                                       "blame");
3398                 }
3399                 if (defined $hash_base) {
3400                         print " | " .
3401                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3402                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3403                                       "history");
3404                 }
3405                 print " | " .
3406                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3407                                                file_name=>"$basedir$t->{'name'}")},
3408                                 "raw");
3409                 print "</td>\n";
3410
3411         } elsif ($t->{'type'} eq "tree") {
3412                 print "<td class=\"list\">";
3413                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3414                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3415                               esc_path($t->{'name'}));
3416                 print "</td>\n";
3417                 print "<td class=\"link\">";
3418                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3419                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3420                               "tree");
3421                 if (defined $hash_base) {
3422                         print " | " .
3423                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3424                                                      file_name=>"$basedir$t->{'name'}")},
3425                                       "history");
3426                 }
3427                 print "</td>\n";
3428         } else {
3429                 # unknown object: we can only present history for it
3430                 # (this includes 'commit' object, i.e. submodule support)
3431                 print "<td class=\"list\">" .
3432                       esc_path($t->{'name'}) .
3433                       "</td>\n";
3434                 print "<td class=\"link\">";
3435                 if (defined $hash_base) {
3436                         print $cgi->a({-href => href(action=>"history",
3437                                                      hash_base=>$hash_base,
3438                                                      file_name=>"$basedir$t->{'name'}")},
3439                                       "history");
3440                 }
3441                 print "</td>\n";
3442         }
3443 }
3444
3445 ## ......................................................................
3446 ## functions printing large fragments of HTML
3447
3448 # get pre-image filenames for merge (combined) diff
3449 sub fill_from_file_info {
3450         my ($diff, @parents) = @_;
3451
3452         $diff->{'from_file'} = [ ];
3453         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3454         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3455                 if ($diff->{'status'}[$i] eq 'R' ||
3456                     $diff->{'status'}[$i] eq 'C') {
3457                         $diff->{'from_file'}[$i] =
3458                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3459                 }
3460         }
3461
3462         return $diff;
3463 }
3464
3465 # is current raw difftree line of file deletion
3466 sub is_deleted {
3467         my $diffinfo = shift;
3468
3469         return $diffinfo->{'to_id'} eq ('0' x 40);
3470 }
3471
3472 # does patch correspond to [previous] difftree raw line
3473 # $diffinfo  - hashref of parsed raw diff format
3474 # $patchinfo - hashref of parsed patch diff format
3475 #              (the same keys as in $diffinfo)
3476 sub is_patch_split {
3477         my ($diffinfo, $patchinfo) = @_;
3478
3479         return defined $diffinfo && defined $patchinfo
3480                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3481 }
3482
3483
3484 sub git_difftree_body {
3485         my ($difftree, $hash, @parents) = @_;
3486         my ($parent) = $parents[0];
3487         my $have_blame = gitweb_check_feature('blame');
3488         print "<div class=\"list_head\">\n";
3489         if ($#{$difftree} > 10) {
3490                 print(($#{$difftree} + 1) . " files changed:\n");
3491         }
3492         print "</div>\n";
3493
3494         print "<table class=\"" .
3495               (@parents > 1 ? "combined " : "") .
3496               "diff_tree\">\n";
3497
3498         # header only for combined diff in 'commitdiff' view
3499         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3500         if ($has_header) {
3501                 # table header
3502                 print "<thead><tr>\n" .
3503                        "<th></th><th></th>\n"; # filename, patchN link
3504                 for (my $i = 0; $i < @parents; $i++) {
3505                         my $par = $parents[$i];
3506                         print "<th>" .
3507                               $cgi->a({-href => href(action=>"commitdiff",
3508                                                      hash=>$hash, hash_parent=>$par),
3509                                        -title => 'commitdiff to parent number ' .
3510                                                   ($i+1) . ': ' . substr($par,0,7)},
3511                                       $i+1) .
3512                               "&nbsp;</th>\n";
3513                 }
3514                 print "</tr></thead>\n<tbody>\n";
3515         }
3516
3517         my $alternate = 1;
3518         my $patchno = 0;
3519         foreach my $line (@{$difftree}) {
3520                 my $diff = parsed_difftree_line($line);
3521
3522                 if ($alternate) {
3523                         print "<tr class=\"dark\">\n";
3524                 } else {
3525                         print "<tr class=\"light\">\n";
3526                 }
3527                 $alternate ^= 1;
3528
3529                 if (exists $diff->{'nparents'}) { # combined diff
3530
3531                         fill_from_file_info($diff, @parents)
3532                                 unless exists $diff->{'from_file'};
3533
3534                         if (!is_deleted($diff)) {
3535                                 # file exists in the result (child) commit
3536                                 print "<td>" .
3537                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3538                                                              file_name=>$diff->{'to_file'},
3539                                                              hash_base=>$hash),
3540                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3541                                       "</td>\n";
3542                         } else {
3543                                 print "<td>" .
3544                                       esc_path($diff->{'to_file'}) .
3545                                       "</td>\n";
3546                         }
3547
3548                         if ($action eq 'commitdiff') {
3549                                 # link to patch
3550                                 $patchno++;
3551                                 print "<td class=\"link\">" .
3552                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3553                                       " | " .
3554                                       "</td>\n";
3555                         }
3556
3557                         my $has_history = 0;
3558                         my $not_deleted = 0;
3559                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3560                                 my $hash_parent = $parents[$i];
3561                                 my $from_hash = $diff->{'from_id'}[$i];
3562                                 my $from_path = $diff->{'from_file'}[$i];
3563                                 my $status = $diff->{'status'}[$i];
3564
3565                                 $has_history ||= ($status ne 'A');
3566                                 $not_deleted ||= ($status ne 'D');
3567
3568                                 if ($status eq 'A') {
3569                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3570                                 } elsif ($status eq 'D') {
3571                                         print "<td class=\"link\">" .
3572                                               $cgi->a({-href => href(action=>"blob",
3573                                                                      hash_base=>$hash,
3574                                                                      hash=>$from_hash,
3575                                                                      file_name=>$from_path)},
3576                                                       "blob" . ($i+1)) .
3577                                               " | </td>\n";
3578                                 } else {
3579                                         if ($diff->{'to_id'} eq $from_hash) {
3580                                                 print "<td class=\"link nochange\">";
3581                                         } else {
3582                                                 print "<td class=\"link\">";
3583                                         }
3584                                         print $cgi->a({-href => href(action=>"blobdiff",
3585                                                                      hash=>$diff->{'to_id'},
3586                                                                      hash_parent=>$from_hash,
3587                                                                      hash_base=>$hash,
3588                                                                      hash_parent_base=>$hash_parent,
3589                                                                      file_name=>$diff->{'to_file'},
3590                                                                      file_parent=>$from_path)},
3591                                                       "diff" . ($i+1)) .
3592                                               " | </td>\n";
3593                                 }
3594                         }
3595
3596                         print "<td class=\"link\">";
3597                         if ($not_deleted) {
3598                                 print $cgi->a({-href => href(action=>"blob",
3599                                                              hash=>$diff->{'to_id'},
3600                                                              file_name=>$diff->{'to_file'},
3601                                                              hash_base=>$hash)},
3602                                               "blob");
3603                                 print " | " if ($has_history);
3604                         }
3605                         if ($has_history) {
3606                                 print $cgi->a({-href => href(action=>"history",
3607                                                              file_name=>$diff->{'to_file'},
3608                                                              hash_base=>$hash)},
3609                                               "history");
3610                         }
3611                         print "</td>\n";
3612
3613                         print "</tr>\n";
3614                         next; # instead of 'else' clause, to avoid extra indent
3615                 }
3616                 # else ordinary diff
3617
3618                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3619                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3620                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3621                         $to_mode_oct = oct $diff->{'to_mode'};
3622                         if (S_ISREG($to_mode_oct)) { # only for regular file
3623                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3624                         }
3625                         $to_file_type = file_type($diff->{'to_mode'});
3626                 }
3627                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3628                         $from_mode_oct = oct $diff->{'from_mode'};
3629                         if (S_ISREG($to_mode_oct)) { # only for regular file
3630                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3631                         }
3632                         $from_file_type = file_type($diff->{'from_mode'});
3633                 }
3634
3635                 if ($diff->{'status'} eq "A") { # created
3636                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3637                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3638                         $mode_chng   .= "]</span>";
3639                         print "<td>";
3640                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3641                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3642                                       -class => "list"}, esc_path($diff->{'file'}));
3643                         print "</td>\n";
3644                         print "<td>$mode_chng</td>\n";
3645                         print "<td class=\"link\">";
3646                         if ($action eq 'commitdiff') {
3647                                 # link to patch
3648                                 $patchno++;
3649                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3650                                 print " | ";
3651                         }
3652                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3653                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3654                                       "blob");
3655                         print "</td>\n";
3656
3657                 } elsif ($diff->{'status'} eq "D") { # deleted
3658                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3659                         print "<td>";
3660                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3661                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3662                                        -class => "list"}, esc_path($diff->{'file'}));
3663                         print "</td>\n";
3664                         print "<td>$mode_chng</td>\n";
3665                         print "<td class=\"link\">";
3666                         if ($action eq 'commitdiff') {
3667                                 # link to patch
3668                                 $patchno++;
3669                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3670                                 print " | ";
3671                         }
3672                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3673                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3674                                       "blob") . " | ";
3675                         if ($have_blame) {
3676                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3677                                                              file_name=>$diff->{'file'})},
3678                                               "blame") . " | ";
3679                         }
3680                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3681                                                      file_name=>$diff->{'file'})},
3682                                       "history");
3683                         print "</td>\n";
3684
3685                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3686                         my $mode_chnge = "";
3687                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3688                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3689                                 if ($from_file_type ne $to_file_type) {
3690                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3691                                 }
3692                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3693                                         if ($from_mode_str && $to_mode_str) {
3694                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3695                                         } elsif ($to_mode_str) {
3696                                                 $mode_chnge .= " mode: $to_mode_str";
3697                                         }
3698                                 }
3699                                 $mode_chnge .= "]</span>\n";
3700                         }
3701                         print "<td>";
3702                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3703                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3704                                       -class => "list"}, esc_path($diff->{'file'}));
3705                         print "</td>\n";
3706                         print "<td>$mode_chnge</td>\n";
3707                         print "<td class=\"link\">";
3708                         if ($action eq 'commitdiff') {
3709                                 # link to patch
3710                                 $patchno++;
3711                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3712                                       " | ";
3713                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3714                                 # "commit" view and modified file (not onlu mode changed)
3715                                 print $cgi->a({-href => href(action=>"blobdiff",
3716                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3717                                                              hash_base=>$hash, hash_parent_base=>$parent,
3718                                                              file_name=>$diff->{'file'})},
3719                                               "diff") .
3720                                       " | ";
3721                         }
3722                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3723                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3724                                        "blob") . " | ";
3725                         if ($have_blame) {
3726                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3727                                                              file_name=>$diff->{'file'})},
3728                                               "blame") . " | ";
3729                         }
3730                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3731                                                      file_name=>$diff->{'file'})},
3732                                       "history");
3733                         print "</td>\n";
3734
3735                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3736                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3737                         my $nstatus = $status_name{$diff->{'status'}};
3738                         my $mode_chng = "";
3739                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3740                                 # mode also for directories, so we cannot use $to_mode_str
3741                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3742                         }
3743                         print "<td>" .
3744                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3745                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3746                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3747                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3748                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3749                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3750                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3751                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3752                               "<td class=\"link\">";
3753                         if ($action eq 'commitdiff') {
3754                                 # link to patch
3755                                 $patchno++;
3756                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3757                                       " | ";
3758                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3759                                 # "commit" view and modified file (not only pure rename or copy)
3760                                 print $cgi->a({-href => href(action=>"blobdiff",
3761                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3762                                                              hash_base=>$hash, hash_parent_base=>$parent,
3763                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3764                                               "diff") .
3765                                       " | ";
3766                         }
3767                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3768                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3769                                       "blob") . " | ";
3770                         if ($have_blame) {
3771                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3772                                                              file_name=>$diff->{'to_file'})},
3773                                               "blame") . " | ";
3774                         }
3775                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3776                                                     file_name=>$diff->{'to_file'})},
3777                                       "history");
3778                         print "</td>\n";
3779
3780                 } # we should not encounter Unmerged (U) or Unknown (X) status
3781                 print "</tr>\n";
3782         }
3783         print "</tbody>" if $has_header;
3784         print "</table>\n";
3785 }
3786
3787 sub git_patchset_body {
3788         my ($fd, $difftree, $hash, @hash_parents) = @_;
3789         my ($hash_parent) = $hash_parents[0];
3790
3791         my $is_combined = (@hash_parents > 1);
3792         my $patch_idx = 0;
3793         my $patch_number = 0;
3794         my $patch_line;
3795         my $diffinfo;
3796         my $to_name;
3797         my (%from, %to);
3798
3799         print "<div class=\"patchset\">\n";
3800
3801         # skip to first patch
3802         while ($patch_line = <$fd>) {
3803                 chomp $patch_line;
3804
3805                 last if ($patch_line =~ m/^diff /);
3806         }
3807
3808  PATCH:
3809         while ($patch_line) {
3810
3811                 # parse "git diff" header line
3812                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3813                         # $1 is from_name, which we do not use
3814                         $to_name = unquote($2);
3815                         $to_name =~ s!^b/!!;
3816                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3817                         # $1 is 'cc' or 'combined', which we do not use
3818                         $to_name = unquote($2);
3819                 } else {
3820                         $to_name = undef;
3821                 }
3822
3823                 # check if current patch belong to current raw line
3824                 # and parse raw git-diff line if needed
3825                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3826                         # this is continuation of a split patch
3827                         print "<div class=\"patch cont\">\n";
3828                 } else {
3829                         # advance raw git-diff output if needed
3830                         $patch_idx++ if defined $diffinfo;
3831
3832                         # read and prepare patch information
3833                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3834
3835                         # compact combined diff output can have some patches skipped
3836                         # find which patch (using pathname of result) we are at now;
3837                         if ($is_combined) {
3838                                 while ($to_name ne $diffinfo->{'to_file'}) {
3839                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3840                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3841                                               "</div>\n";  # class="patch"
3842
3843                                         $patch_idx++;
3844                                         $patch_number++;
3845
3846                                         last if $patch_idx > $#$difftree;
3847                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3848                                 }
3849                         }
3850
3851                         # modifies %from, %to hashes
3852                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3853
3854                         # this is first patch for raw difftree line with $patch_idx index
3855                         # we index @$difftree array from 0, but number patches from 1
3856                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3857                 }
3858
3859                 # git diff header
3860                 #assert($patch_line =~ m/^diff /) if DEBUG;
3861                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3862                 $patch_number++;
3863                 # print "git diff" header
3864                 print format_git_diff_header_line($patch_line, $diffinfo,
3865                                                   \%from, \%to);
3866
3867                 # print extended diff header
3868                 print "<div class=\"diff extended_header\">\n";
3869         EXTENDED_HEADER:
3870                 while ($patch_line = <$fd>) {
3871                         chomp $patch_line;
3872
3873                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3874
3875                         print format_extended_diff_header_line($patch_line, $diffinfo,
3876                                                                \%from, \%to);
3877                 }
3878                 print "</div>\n"; # class="diff extended_header"
3879
3880                 # from-file/to-file diff header
3881                 if (! $patch_line) {
3882                         print "</div>\n"; # class="patch"
3883                         last PATCH;
3884                 }
3885                 next PATCH if ($patch_line =~ m/^diff /);
3886                 #assert($patch_line =~ m/^---/) if DEBUG;
3887
3888                 my $last_patch_line = $patch_line;
3889                 $patch_line = <$fd>;
3890                 chomp $patch_line;
3891                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3892
3893                 print format_diff_from_to_header($last_patch_line, $patch_line,
3894                                                  $diffinfo, \%from, \%to,
3895                                                  @hash_parents);
3896
3897                 # the patch itself
3898         LINE:
3899                 while ($patch_line = <$fd>) {
3900                         chomp $patch_line;
3901
3902                         next PATCH if ($patch_line =~ m/^diff /);
3903
3904                         print format_diff_line($patch_line, \%from, \%to);
3905                 }
3906
3907         } continue {
3908                 print "</div>\n"; # class="patch"
3909         }
3910
3911         # for compact combined (--cc) format, with chunk and patch simpliciaction
3912         # patchset might be empty, but there might be unprocessed raw lines
3913         for (++$patch_idx if $patch_number > 0;
3914              $patch_idx < @$difftree;
3915              ++$patch_idx) {
3916                 # read and prepare patch information
3917                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3918
3919                 # generate anchor for "patch" links in difftree / whatchanged part
3920                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3921                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3922                       "</div>\n";  # class="patch"
3923
3924                 $patch_number++;
3925         }
3926
3927         if ($patch_number == 0) {
3928                 if (@hash_parents > 1) {
3929                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3930                 } else {
3931                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3932                 }
3933         }
3934
3935         print "</div>\n"; # class="patchset"
3936 }
3937
3938 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3939
3940 # fills project list info (age, description, owner, forks) for each
3941 # project in the list, removing invalid projects from returned list
3942 # NOTE: modifies $projlist, but does not remove entries from it
3943 sub fill_project_list_info {
3944         my ($projlist, $check_forks) = @_;
3945         my @projects;
3946
3947         my $show_ctags = gitweb_check_feature('ctags');
3948  PROJECT:
3949         foreach my $pr (@$projlist) {
3950                 my (@activity) = git_get_last_activity($pr->{'path'});
3951                 unless (@activity) {
3952                         next PROJECT;
3953                 }
3954                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
3955                 if (!defined $pr->{'descr'}) {
3956                         my $descr = git_get_project_description($pr->{'path'}) || "";
3957                         $descr = to_utf8($descr);
3958                         $pr->{'descr_long'} = $descr;
3959                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3960                 }
3961                 if (!defined $pr->{'owner'}) {
3962                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3963                 }
3964                 if ($check_forks) {
3965                         my $pname = $pr->{'path'};
3966                         if (($pname =~ s/\.git$//) &&
3967                             ($pname !~ /\/$/) &&
3968                             (-d "$projectroot/$pname")) {
3969                                 $pr->{'forks'} = "-d $projectroot/$pname";
3970                         }       else {
3971                                 $pr->{'forks'} = 0;
3972                         }
3973                 }
3974                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
3975                 push @projects, $pr;
3976         }
3977
3978         return @projects;
3979 }
3980
3981 # print 'sort by' <th> element, generating 'sort by $name' replay link
3982 # if that order is not selected
3983 sub print_sort_th {
3984         my ($name, $order, $header) = @_;
3985         $header ||= ucfirst($name);
3986
3987         if ($order eq $name) {
3988                 print "<th>$header</th>\n";
3989         } else {
3990                 print "<th>" .
3991                       $cgi->a({-href => href(-replay=>1, order=>$name),
3992                                -class => "header"}, $header) .
3993                       "</th>\n";
3994         }
3995 }
3996
3997 sub git_project_list_body {
3998         # actually uses global variable $project
3999         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4000
4001         my $check_forks = gitweb_check_feature('forks');
4002         my @projects = fill_project_list_info($projlist, $check_forks);
4003
4004         $order ||= $default_projects_order;
4005         $from = 0 unless defined $from;
4006         $to = $#projects if (!defined $to || $#projects < $to);
4007
4008         my %order_info = (
4009                 project => { key => 'path', type => 'str' },
4010                 descr => { key => 'descr_long', type => 'str' },
4011                 owner => { key => 'owner', type => 'str' },
4012                 age => { key => 'age', type => 'num' }
4013         );
4014         my $oi = $order_info{$order};
4015         if ($oi->{'type'} eq 'str') {
4016                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4017         } else {
4018                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4019         }
4020
4021         my $show_ctags = gitweb_check_feature('ctags');
4022         if ($show_ctags) {
4023                 my %ctags;
4024                 foreach my $p (@projects) {
4025                         foreach my $ct (keys %{$p->{'ctags'}}) {
4026                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4027                         }
4028                 }
4029                 my $cloud = git_populate_project_tagcloud(\%ctags);
4030                 print git_show_project_tagcloud($cloud, 64);
4031         }
4032
4033         print "<table class=\"project_list\">\n";
4034         unless ($no_header) {
4035                 print "<tr>\n";
4036                 if ($check_forks) {
4037                         print "<th></th>\n";
4038                 }
4039                 print_sort_th('project', $order, 'Project');
4040                 print_sort_th('descr', $order, 'Description');
4041                 print_sort_th('owner', $order, 'Owner');
4042                 print_sort_th('age', $order, 'Last Change');
4043                 print "<th></th>\n" . # for links
4044                       "</tr>\n";
4045         }
4046         my $alternate = 1;
4047         my $tagfilter = $cgi->param('by_tag');
4048         for (my $i = $from; $i <= $to; $i++) {
4049                 my $pr = $projects[$i];
4050
4051                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4052                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4053                         and not $pr->{'descr_long'} =~ /$searchtext/;
4054                 # Weed out forks or non-matching entries of search
4055                 if ($check_forks) {
4056                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4057                         $forkbase="^$forkbase" if $forkbase;
4058                         next if not $searchtext and not $tagfilter and $show_ctags
4059                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4060                 }
4061
4062                 if ($alternate) {
4063                         print "<tr class=\"dark\">\n";
4064                 } else {
4065                         print "<tr class=\"light\">\n";
4066                 }
4067                 $alternate ^= 1;
4068                 if ($check_forks) {
4069                         print "<td>";
4070                         if ($pr->{'forks'}) {
4071                                 print "<!-- $pr->{'forks'} -->\n";
4072                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4073                         }
4074                         print "</td>\n";
4075                 }
4076                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4077                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4078                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4079                                         -class => "list", -title => $pr->{'descr_long'}},
4080                                         esc_html($pr->{'descr'})) . "</td>\n" .
4081                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4082                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4083                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4084                       "<td class=\"link\">" .
4085                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4086                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4087                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4088                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4089                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4090                       "</td>\n" .
4091                       "</tr>\n";
4092         }
4093         if (defined $extra) {
4094                 print "<tr>\n";
4095                 if ($check_forks) {
4096                         print "<td></td>\n";
4097                 }
4098                 print "<td colspan=\"5\">$extra</td>\n" .
4099                       "</tr>\n";
4100         }
4101         print "</table>\n";
4102 }
4103
4104 sub git_shortlog_body {
4105         # uses global variable $project
4106         my ($commitlist, $from, $to, $refs, $extra) = @_;
4107
4108         $from = 0 unless defined $from;
4109         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4110
4111         print "<table class=\"shortlog\">\n";
4112         my $alternate = 1;
4113         for (my $i = $from; $i <= $to; $i++) {
4114                 my %co = %{$commitlist->[$i]};
4115                 my $commit = $co{'id'};
4116                 my $ref = format_ref_marker($refs, $commit);
4117                 if ($alternate) {
4118                         print "<tr class=\"dark\">\n";
4119                 } else {
4120                         print "<tr class=\"light\">\n";
4121                 }
4122                 $alternate ^= 1;
4123                 my $author = chop_and_escape_str($co{'author_name'}, 10);
4124                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4125                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4126                       "<td><i>" . $author . "</i></td>\n" .
4127                       "<td>";
4128                 print format_subject_html($co{'title'}, $co{'title_short'},
4129                                           href(action=>"commit", hash=>$commit), $ref);
4130                 print "</td>\n" .
4131                       "<td class=\"link\">" .
4132                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4133                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4134                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4135                 my $snapshot_links = format_snapshot_links($commit);
4136                 if (defined $snapshot_links) {
4137                         print " | " . $snapshot_links;
4138                 }
4139                 print "</td>\n" .
4140                       "</tr>\n";
4141         }
4142         if (defined $extra) {
4143                 print "<tr>\n" .
4144                       "<td colspan=\"4\">$extra</td>\n" .
4145                       "</tr>\n";
4146         }
4147         print "</table>\n";
4148 }
4149
4150 sub git_history_body {
4151         # Warning: assumes constant type (blob or tree) during history
4152         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4153
4154         $from = 0 unless defined $from;
4155         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4156
4157         print "<table class=\"history\">\n";
4158         my $alternate = 1;
4159         for (my $i = $from; $i <= $to; $i++) {
4160                 my %co = %{$commitlist->[$i]};
4161                 if (!%co) {
4162                         next;
4163                 }
4164                 my $commit = $co{'id'};
4165
4166                 my $ref = format_ref_marker($refs, $commit);
4167
4168                 if ($alternate) {
4169                         print "<tr class=\"dark\">\n";
4170                 } else {
4171                         print "<tr class=\"light\">\n";
4172                 }
4173                 $alternate ^= 1;
4174         # shortlog uses      chop_str($co{'author_name'}, 10)
4175                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
4176                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4177                       "<td><i>" . $author . "</i></td>\n" .
4178                       "<td>";
4179                 # originally git_history used chop_str($co{'title'}, 50)
4180                 print format_subject_html($co{'title'}, $co{'title_short'},
4181                                           href(action=>"commit", hash=>$commit), $ref);
4182                 print "</td>\n" .
4183                       "<td class=\"link\">" .
4184                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4185                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4186
4187                 if ($ftype eq 'blob') {
4188                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4189                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4190                         if (defined $blob_current && defined $blob_parent &&
4191                                         $blob_current ne $blob_parent) {
4192                                 print " | " .
4193                                         $cgi->a({-href => href(action=>"blobdiff",
4194                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4195                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4196                                                                file_name=>$file_name)},
4197                                                 "diff to current");
4198                         }
4199                 }
4200                 print "</td>\n" .
4201                       "</tr>\n";
4202         }
4203         if (defined $extra) {
4204                 print "<tr>\n" .
4205                       "<td colspan=\"4\">$extra</td>\n" .
4206                       "</tr>\n";
4207         }
4208         print "</table>\n";
4209 }
4210
4211 sub git_tags_body {
4212         # uses global variable $project
4213         my ($taglist, $from, $to, $extra) = @_;
4214         $from = 0 unless defined $from;
4215         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4216
4217         print "<table class=\"tags\">\n";
4218         my $alternate = 1;
4219         for (my $i = $from; $i <= $to; $i++) {
4220                 my $entry = $taglist->[$i];
4221                 my %tag = %$entry;
4222                 my $comment = $tag{'subject'};
4223                 my $comment_short;
4224                 if (defined $comment) {
4225                         $comment_short = chop_str($comment, 30, 5);
4226                 }
4227                 if ($alternate) {
4228                         print "<tr class=\"dark\">\n";
4229                 } else {
4230                         print "<tr class=\"light\">\n";
4231                 }
4232                 $alternate ^= 1;
4233                 if (defined $tag{'age'}) {
4234                         print "<td><i>$tag{'age'}</i></td>\n";
4235                 } else {
4236                         print "<td></td>\n";
4237                 }
4238                 print "<td>" .
4239                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4240                                -class => "list name"}, esc_html($tag{'name'})) .
4241                       "</td>\n" .
4242                       "<td>";
4243                 if (defined $comment) {
4244                         print format_subject_html($comment, $comment_short,
4245                                                   href(action=>"tag", hash=>$tag{'id'}));
4246                 }
4247                 print "</td>\n" .
4248                       "<td class=\"selflink\">";
4249                 if ($tag{'type'} eq "tag") {
4250                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4251                 } else {
4252                         print "&nbsp;";
4253                 }
4254                 print "</td>\n" .
4255                       "<td class=\"link\">" . " | " .
4256                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4257                 if ($tag{'reftype'} eq "commit") {
4258                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4259                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4260                 } elsif ($tag{'reftype'} eq "blob") {
4261                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4262                 }
4263                 print "</td>\n" .
4264                       "</tr>";
4265         }
4266         if (defined $extra) {
4267                 print "<tr>\n" .
4268                       "<td colspan=\"5\">$extra</td>\n" .
4269                       "</tr>\n";
4270         }
4271         print "</table>\n";
4272 }
4273
4274 sub git_heads_body {
4275         # uses global variable $project
4276         my ($headlist, $head, $from, $to, $extra) = @_;
4277         $from = 0 unless defined $from;
4278         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4279
4280         print "<table class=\"heads\">\n";
4281         my $alternate = 1;
4282         for (my $i = $from; $i <= $to; $i++) {
4283                 my $entry = $headlist->[$i];
4284                 my %ref = %$entry;
4285                 my $curr = $ref{'id'} eq $head;
4286                 if ($alternate) {
4287                         print "<tr class=\"dark\">\n";
4288                 } else {
4289                         print "<tr class=\"light\">\n";
4290                 }
4291                 $alternate ^= 1;
4292                 print "<td><i>$ref{'age'}</i></td>\n" .
4293                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4294                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4295                                -class => "list name"},esc_html($ref{'name'})) .
4296                       "</td>\n" .
4297                       "<td class=\"link\">" .
4298                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4299                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4300                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4301                       "</td>\n" .
4302                       "</tr>";
4303         }
4304         if (defined $extra) {
4305                 print "<tr>\n" .
4306                       "<td colspan=\"3\">$extra</td>\n" .
4307                       "</tr>\n";
4308         }
4309         print "</table>\n";
4310 }
4311
4312 sub git_search_grep_body {
4313         my ($commitlist, $from, $to, $extra) = @_;
4314         $from = 0 unless defined $from;
4315         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4316
4317         print "<table class=\"commit_search\">\n";
4318         my $alternate = 1;
4319         for (my $i = $from; $i <= $to; $i++) {
4320                 my %co = %{$commitlist->[$i]};
4321                 if (!%co) {
4322                         next;
4323                 }
4324                 my $commit = $co{'id'};
4325                 if ($alternate) {
4326                         print "<tr class=\"dark\">\n";
4327                 } else {
4328                         print "<tr class=\"light\">\n";
4329                 }
4330                 $alternate ^= 1;
4331                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
4332                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4333                       "<td><i>" . $author . "</i></td>\n" .
4334                       "<td>" .
4335                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4336                                -class => "list subject"},
4337                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4338                 my $comment = $co{'comment'};
4339                 foreach my $line (@$comment) {
4340                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4341                                 my ($lead, $match, $trail) = ($1, $2, $3);
4342                                 $match = chop_str($match, 70, 5, 'center');
4343                                 my $contextlen = int((80 - length($match))/2);
4344                                 $contextlen = 30 if ($contextlen > 30);
4345                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4346                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4347
4348                                 $lead  = esc_html($lead);
4349                                 $match = esc_html($match);
4350                                 $trail = esc_html($trail);
4351
4352                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4353                         }
4354                 }
4355                 print "</td>\n" .
4356                       "<td class=\"link\">" .
4357                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4358                       " | " .
4359                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4360                       " | " .
4361                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4362                 print "</td>\n" .
4363                       "</tr>\n";
4364         }
4365         if (defined $extra) {
4366                 print "<tr>\n" .
4367                       "<td colspan=\"3\">$extra</td>\n" .
4368                       "</tr>\n";
4369         }
4370         print "</table>\n";
4371 }
4372
4373 ## ======================================================================
4374 ## ======================================================================
4375 ## actions
4376
4377 sub git_project_list {
4378         my $order = $input_params{'order'};
4379         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4380                 die_error(400, "Unknown order parameter");
4381         }
4382
4383         my @list = git_get_projects_list();
4384         if (!@list) {
4385                 die_error(404, "No projects found");
4386         }
4387
4388         git_header_html();
4389         if (-f $home_text) {
4390                 print "<div class=\"index_include\">\n";
4391                 insert_file($home_text);
4392                 print "</div>\n";
4393         }
4394         print $cgi->startform(-method => "get") .
4395               "<p class=\"projsearch\">Search:\n" .
4396               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4397               "</p>" .
4398               $cgi->end_form() . "\n";
4399         git_project_list_body(\@list, $order);
4400         git_footer_html();
4401 }
4402
4403 sub git_forks {
4404         my $order = $input_params{'order'};
4405         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4406                 die_error(400, "Unknown order parameter");
4407         }
4408
4409         my @list = git_get_projects_list($project);
4410         if (!@list) {
4411                 die_error(404, "No forks found");
4412         }
4413
4414         git_header_html();
4415         git_print_page_nav('','');
4416         git_print_header_div('summary', "$project forks");
4417         git_project_list_body(\@list, $order);
4418         git_footer_html();
4419 }
4420
4421 sub git_project_index {
4422         my @projects = git_get_projects_list($project);
4423
4424         print $cgi->header(
4425                 -type => 'text/plain',
4426                 -charset => 'utf-8',
4427                 -content_disposition => 'inline; filename="index.aux"');
4428
4429         foreach my $pr (@projects) {
4430                 if (!exists $pr->{'owner'}) {
4431                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4432                 }
4433
4434                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4435                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4436                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4437                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4438                 $path  =~ s/ /\+/g;
4439                 $owner =~ s/ /\+/g;
4440
4441                 print "$path $owner\n";
4442         }
4443 }
4444
4445 sub git_summary {
4446         my $descr = git_get_project_description($project) || "none";
4447         my %co = parse_commit("HEAD");
4448         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4449         my $head = $co{'id'};
4450
4451         my $owner = git_get_project_owner($project);
4452
4453         my $refs = git_get_references();
4454         # These get_*_list functions return one more to allow us to see if
4455         # there are more ...
4456         my @taglist  = git_get_tags_list(16);
4457         my @headlist = git_get_heads_list(16);
4458         my @forklist;
4459         my $check_forks = gitweb_check_feature('forks');
4460
4461         if ($check_forks) {
4462                 @forklist = git_get_projects_list($project);
4463         }
4464
4465         git_header_html();
4466         git_print_page_nav('summary','', $head);
4467
4468         print "<div class=\"title\">&nbsp;</div>\n";
4469         print "<table class=\"projects_list\">\n" .
4470               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4471               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4472         if (defined $cd{'rfc2822'}) {
4473                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4474         }
4475
4476         # use per project git URL list in $projectroot/$project/cloneurl
4477         # or make project git URL from git base URL and project name
4478         my $url_tag = "URL";
4479         my @url_list = git_get_project_url_list($project);
4480         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4481         foreach my $git_url (@url_list) {
4482                 next unless $git_url;
4483                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4484                 $url_tag = "";
4485         }
4486
4487         # Tag cloud
4488         my $show_ctags = gitweb_check_feature('ctags');
4489         if ($show_ctags) {
4490                 my $ctags = git_get_project_ctags($project);
4491                 my $cloud = git_populate_project_tagcloud($ctags);
4492                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4493                 print "</td>\n<td>" unless %$ctags;
4494                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4495                 print "</td>\n<td>" if %$ctags;
4496                 print git_show_project_tagcloud($cloud, 48);
4497                 print "</td></tr>";
4498         }
4499
4500         print "</table>\n";
4501
4502         if (-s "$projectroot/$project/README.html") {
4503                 print "<div class=\"title\">readme</div>\n" .
4504                       "<div class=\"readme\">\n";
4505                 insert_file("$projectroot/$project/README.html");
4506                 print "\n</div>\n"; # class="readme"
4507         }
4508
4509         # we need to request one more than 16 (0..15) to check if
4510         # those 16 are all
4511         my @commitlist = $head ? parse_commits($head, 17) : ();
4512         if (@commitlist) {
4513                 git_print_header_div('shortlog');
4514                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4515                                   $#commitlist <=  15 ? undef :
4516                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4517         }
4518
4519         if (@taglist) {
4520                 git_print_header_div('tags');
4521                 git_tags_body(\@taglist, 0, 15,
4522                               $#taglist <=  15 ? undef :
4523                               $cgi->a({-href => href(action=>"tags")}, "..."));
4524         }
4525
4526         if (@headlist) {
4527                 git_print_header_div('heads');
4528                 git_heads_body(\@headlist, $head, 0, 15,
4529                                $#headlist <= 15 ? undef :
4530                                $cgi->a({-href => href(action=>"heads")}, "..."));
4531         }
4532
4533         if (@forklist) {
4534                 git_print_header_div('forks');
4535                 git_project_list_body(\@forklist, 'age', 0, 15,
4536                                       $#forklist <= 15 ? undef :
4537                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4538                                       'no_header');
4539         }
4540
4541         git_footer_html();
4542 }
4543
4544 sub git_tag {
4545         my $head = git_get_head_hash($project);
4546         git_header_html();
4547         git_print_page_nav('','', $head,undef,$head);
4548         my %tag = parse_tag($hash);
4549
4550         if (! %tag) {
4551                 die_error(404, "Unknown tag object");
4552         }
4553
4554         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4555         print "<div class=\"title_text\">\n" .
4556               "<table class=\"object_header\">\n" .
4557               "<tr>\n" .
4558               "<td>object</td>\n" .
4559               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4560                                $tag{'object'}) . "</td>\n" .
4561               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4562                                               $tag{'type'}) . "</td>\n" .
4563               "</tr>\n";
4564         if (defined($tag{'author'})) {
4565                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4566                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4567                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4568                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4569                         "</td></tr>\n";
4570         }
4571         print "</table>\n\n" .
4572               "</div>\n";
4573         print "<div class=\"page_body\">";
4574         my $comment = $tag{'comment'};
4575         foreach my $line (@$comment) {
4576                 chomp $line;
4577                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4578         }
4579         print "</div>\n";
4580         git_footer_html();
4581 }
4582
4583 sub git_blame {
4584         # permissions
4585         gitweb_check_feature('blame')
4586                 or die_error(403, "Blame view not allowed");
4587
4588         # error checking
4589         die_error(400, "No file name given") unless $file_name;
4590         $hash_base ||= git_get_head_hash($project);
4591         die_error(404, "Couldn't find base commit") unless $hash_base;
4592         my %co = parse_commit($hash_base)
4593                 or die_error(404, "Commit not found");
4594         my $ftype = "blob";
4595         if (!defined $hash) {
4596                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4597                         or die_error(404, "Error looking up file");
4598         } else {
4599                 $ftype = git_get_type($hash);
4600                 if ($ftype !~ "blob") {
4601                         die_error(400, "Object is not a blob");
4602                 }
4603         }
4604
4605         # run git-blame --porcelain
4606         open my $fd, "-|", git_cmd(), "blame", '-p',
4607                 $hash_base, '--', $file_name
4608                 or die_error(500, "Open git-blame failed");
4609
4610         # page header
4611         git_header_html();
4612         my $formats_nav =
4613                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4614                         "blob") .
4615                 " | " .
4616                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4617                         "history") .
4618                 " | " .
4619                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4620                         "HEAD");
4621         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4622         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4623         git_print_page_path($file_name, $ftype, $hash_base);
4624
4625         # page body
4626         my @rev_color = qw(light2 dark2);
4627         my $num_colors = scalar(@rev_color);
4628         my $current_color = 0;
4629         my %metainfo = ();
4630
4631         print <<HTML;
4632 <div class="page_body">
4633 <table class="blame">
4634 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4635 HTML
4636  LINE:
4637         while (my $line = <$fd>) {
4638                 chomp $line;
4639                 # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
4640                 # no <lines in group> for subsequent lines in group of lines
4641                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4642                    ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
4643                 if (!exists $metainfo{$full_rev}) {
4644                         $metainfo{$full_rev} = {};
4645                 }
4646                 my $meta = $metainfo{$full_rev};
4647                 my $data;
4648                 while ($data = <$fd>) {
4649                         chomp $data;
4650                         last if ($data =~ s/^\t//); # contents of line
4651                         if ($data =~ /^(\S+) (.*)$/) {
4652                                 $meta->{$1} = $2;
4653                         }
4654                 }
4655                 my $short_rev = substr($full_rev, 0, 8);
4656                 my $author = $meta->{'author'};
4657                 my %date =
4658                         parse_date($meta->{'author-time'}, $meta->{'author-tz'});
4659                 my $date = $date{'iso-tz'};
4660                 if ($group_size) {
4661                         $current_color = ($current_color + 1) % $num_colors;
4662                 }
4663                 print "<tr id=\"l$lineno\" class=\"$rev_color[$current_color]\">\n";
4664                 if ($group_size) {
4665                         print "<td class=\"sha1\"";
4666                         print " title=\"". esc_html($author) . ", $date\"";
4667                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4668                         print ">";
4669                         print $cgi->a({-href => href(action=>"commit",
4670                                                      hash=>$full_rev,
4671                                                      file_name=>$file_name)},
4672                                       esc_html($short_rev));
4673                         print "</td>\n";
4674                 }
4675                 my $parent_commit;
4676                 if (!exists $meta->{'parent'}) {
4677                         open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4678                                 or die_error(500, "Open git-rev-parse failed");
4679                         $parent_commit = <$dd>;
4680                         close $dd;
4681                         chomp($parent_commit);
4682                         $meta->{'parent'} = $parent_commit;
4683                 } else {
4684                         $parent_commit = $meta->{'parent'};
4685                 }
4686                 my $blamed = href(action => 'blame',
4687                                   file_name => $meta->{'filename'},
4688                                   hash_base => $parent_commit);
4689                 print "<td class=\"linenr\">";
4690                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4691                                 -class => "linenr" },
4692                               esc_html($lineno));
4693                 print "</td>";
4694                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4695                 print "</tr>\n";
4696         }
4697         print "</table>\n";
4698         print "</div>";
4699         close $fd
4700                 or print "Reading blob failed\n";
4701
4702         # page footer
4703         git_footer_html();
4704 }
4705
4706 sub git_tags {
4707         my $head = git_get_head_hash($project);
4708         git_header_html();
4709         git_print_page_nav('','', $head,undef,$head);
4710         git_print_header_div('summary', $project);
4711
4712         my @tagslist = git_get_tags_list();
4713         if (@tagslist) {
4714                 git_tags_body(\@tagslist);
4715         }
4716         git_footer_html();
4717 }
4718
4719 sub git_heads {
4720         my $head = git_get_head_hash($project);
4721         git_header_html();
4722         git_print_page_nav('','', $head,undef,$head);
4723         git_print_header_div('summary', $project);
4724
4725         my @headslist = git_get_heads_list();
4726         if (@headslist) {
4727                 git_heads_body(\@headslist, $head);
4728         }
4729         git_footer_html();
4730 }
4731
4732 sub git_blob_plain {
4733         my $type = shift;
4734         my $expires;
4735
4736         if (!defined $hash) {
4737                 if (defined $file_name) {
4738                         my $base = $hash_base || git_get_head_hash($project);
4739                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4740                                 or die_error(404, "Cannot find file");
4741                 } else {
4742                         die_error(400, "No file name defined");
4743                 }
4744         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4745                 # blobs defined by non-textual hash id's can be cached
4746                 $expires = "+1d";
4747         }
4748
4749         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4750                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4751
4752         # content-type (can include charset)
4753         $type = blob_contenttype($fd, $file_name, $type);
4754
4755         # "save as" filename, even when no $file_name is given
4756         my $save_as = "$hash";
4757         if (defined $file_name) {
4758                 $save_as = $file_name;
4759         } elsif ($type =~ m/^text\//) {
4760                 $save_as .= '.txt';
4761         }
4762
4763         print $cgi->header(
4764                 -type => $type,
4765                 -expires => $expires,
4766                 -content_disposition => 'inline; filename="' . $save_as . '"');
4767         undef $/;
4768         binmode STDOUT, ':raw';
4769         print <$fd>;
4770         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4771         $/ = "\n";
4772         close $fd;
4773 }
4774
4775 sub git_blob {
4776         my $expires;
4777
4778         if (!defined $hash) {
4779                 if (defined $file_name) {
4780                         my $base = $hash_base || git_get_head_hash($project);
4781                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4782                                 or die_error(404, "Cannot find file");
4783                 } else {
4784                         die_error(400, "No file name defined");
4785                 }
4786         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4787                 # blobs defined by non-textual hash id's can be cached
4788                 $expires = "+1d";
4789         }
4790
4791         my $have_blame = gitweb_check_feature('blame');
4792         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4793                 or die_error(500, "Couldn't cat $file_name, $hash");
4794         my $mimetype = blob_mimetype($fd, $file_name);
4795         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4796                 close $fd;
4797                 return git_blob_plain($mimetype);
4798         }
4799         # we can have blame only for text/* mimetype
4800         $have_blame &&= ($mimetype =~ m!^text/!);
4801
4802         git_header_html(undef, $expires);
4803         my $formats_nav = '';
4804         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4805                 if (defined $file_name) {
4806                         if ($have_blame) {
4807                                 $formats_nav .=
4808                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4809                                                 "blame") .
4810                                         " | ";
4811                         }
4812                         $formats_nav .=
4813                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4814                                         "history") .
4815                                 " | " .
4816                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4817                                         "raw") .
4818                                 " | " .
4819                                 $cgi->a({-href => href(action=>"blob",
4820                                                        hash_base=>"HEAD", file_name=>$file_name)},
4821                                         "HEAD");
4822                 } else {
4823                         $formats_nav .=
4824                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4825                                         "raw");
4826                 }
4827                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4828                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4829         } else {
4830                 print "<div class=\"page_nav\">\n" .
4831                       "<br/><br/></div>\n" .
4832                       "<div class=\"title\">$hash</div>\n";
4833         }
4834         git_print_page_path($file_name, "blob", $hash_base);
4835         print "<div class=\"page_body\">\n";
4836         if ($mimetype =~ m!^image/!) {
4837                 print qq!<img type="$mimetype"!;
4838                 if ($file_name) {
4839                         print qq! alt="$file_name" title="$file_name"!;
4840                 }
4841                 print qq! src="! .
4842                       href(action=>"blob_plain", hash=>$hash,
4843                            hash_base=>$hash_base, file_name=>$file_name) .
4844                       qq!" />\n!;
4845         } else {
4846                 my $nr;
4847                 while (my $line = <$fd>) {
4848                         chomp $line;
4849                         $nr++;
4850                         $line = untabify($line);
4851                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4852                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4853                 }
4854         }
4855         close $fd
4856                 or print "Reading blob failed.\n";
4857         print "</div>";
4858         git_footer_html();
4859 }
4860
4861 sub git_tree {
4862         if (!defined $hash_base) {
4863                 $hash_base = "HEAD";
4864         }
4865         if (!defined $hash) {
4866                 if (defined $file_name) {
4867                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4868                 } else {
4869                         $hash = $hash_base;
4870                 }
4871         }
4872         die_error(404, "No such tree") unless defined($hash);
4873         $/ = "\0";
4874         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4875                 or die_error(500, "Open git-ls-tree failed");
4876         my @entries = map { chomp; $_ } <$fd>;
4877         close $fd or die_error(404, "Reading tree failed");
4878         $/ = "\n";
4879
4880         my $refs = git_get_references();
4881         my $ref = format_ref_marker($refs, $hash_base);
4882         git_header_html();
4883         my $basedir = '';
4884         my $have_blame = gitweb_check_feature('blame');
4885         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4886                 my @views_nav = ();
4887                 if (defined $file_name) {
4888                         push @views_nav,
4889                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4890                                         "history"),
4891                                 $cgi->a({-href => href(action=>"tree",
4892                                                        hash_base=>"HEAD", file_name=>$file_name)},
4893                                         "HEAD"),
4894                 }
4895                 my $snapshot_links = format_snapshot_links($hash);
4896                 if (defined $snapshot_links) {
4897                         # FIXME: Should be available when we have no hash base as well.
4898                         push @views_nav, $snapshot_links;
4899                 }
4900                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4901                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4902         } else {
4903                 undef $hash_base;
4904                 print "<div class=\"page_nav\">\n";
4905                 print "<br/><br/></div>\n";
4906                 print "<div class=\"title\">$hash</div>\n";
4907         }
4908         if (defined $file_name) {
4909                 $basedir = $file_name;
4910                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4911                         $basedir .= '/';
4912                 }
4913                 git_print_page_path($file_name, 'tree', $hash_base);
4914         }
4915         print "<div class=\"page_body\">\n";
4916         print "<table class=\"tree\">\n";
4917         my $alternate = 1;
4918         # '..' (top directory) link if possible
4919         if (defined $hash_base &&
4920             defined $file_name && $file_name =~ m![^/]+$!) {
4921                 if ($alternate) {
4922                         print "<tr class=\"dark\">\n";
4923                 } else {
4924                         print "<tr class=\"light\">\n";
4925                 }
4926                 $alternate ^= 1;
4927
4928                 my $up = $file_name;
4929                 $up =~ s!/?[^/]+$!!;
4930                 undef $up unless $up;
4931                 # based on git_print_tree_entry
4932                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4933                 print '<td class="list">';
4934                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4935                                              file_name=>$up)},
4936                               "..");
4937                 print "</td>\n";
4938                 print "<td class=\"link\"></td>\n";
4939
4940                 print "</tr>\n";
4941         }
4942         foreach my $line (@entries) {
4943                 my %t = parse_ls_tree_line($line, -z => 1);
4944
4945                 if ($alternate) {
4946                         print "<tr class=\"dark\">\n";
4947                 } else {
4948                         print "<tr class=\"light\">\n";
4949                 }
4950                 $alternate ^= 1;
4951
4952                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4953
4954                 print "</tr>\n";
4955         }
4956         print "</table>\n" .
4957               "</div>";
4958         git_footer_html();
4959 }
4960
4961 sub git_snapshot {
4962         my $format = $input_params{'snapshot_format'};
4963         if (!@snapshot_fmts) {
4964                 die_error(403, "Snapshots not allowed");
4965         }
4966         # default to first supported snapshot format
4967         $format ||= $snapshot_fmts[0];
4968         if ($format !~ m/^[a-z0-9]+$/) {
4969                 die_error(400, "Invalid snapshot format parameter");
4970         } elsif (!exists($known_snapshot_formats{$format})) {
4971                 die_error(400, "Unknown snapshot format");
4972         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
4973                 die_error(403, "Unsupported snapshot format");
4974         }
4975
4976         if (!defined $hash) {
4977                 $hash = git_get_head_hash($project);
4978         }
4979
4980         my $name = $project;
4981         $name =~ s,([^/])/*\.git$,$1,;
4982         $name = basename($name);
4983         my $filename = to_utf8($name);
4984         $name =~ s/\047/\047\\\047\047/g;
4985         my $cmd;
4986         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4987         $cmd = quote_command(
4988                 git_cmd(), 'archive',
4989                 "--format=$known_snapshot_formats{$format}{'format'}",
4990                 "--prefix=$name/", $hash);
4991         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4992                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
4993         }
4994
4995         print $cgi->header(
4996                 -type => $known_snapshot_formats{$format}{'type'},
4997                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4998                 -status => '200 OK');
4999
5000         open my $fd, "-|", $cmd
5001                 or die_error(500, "Execute git-archive failed");
5002         binmode STDOUT, ':raw';
5003         print <$fd>;
5004         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5005         close $fd;
5006 }
5007
5008 sub git_log {
5009         my $head = git_get_head_hash($project);
5010         if (!defined $hash) {
5011                 $hash = $head;
5012         }
5013         if (!defined $page) {
5014                 $page = 0;
5015         }
5016         my $refs = git_get_references();
5017
5018         my @commitlist = parse_commits($hash, 101, (100 * $page));
5019
5020         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
5021
5022         my ($patch_max) = gitweb_get_feature('patches');
5023         if ($patch_max) {
5024                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5025                         $paging_nav .= " &sdot; " .
5026                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5027                                         "patches");
5028                 }
5029         }
5030
5031         git_header_html();
5032         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5033
5034         if (!@commitlist) {
5035                 my %co = parse_commit($hash);
5036
5037                 git_print_header_div('summary', $project);
5038                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5039         }
5040         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5041         for (my $i = 0; $i <= $to; $i++) {
5042                 my %co = %{$commitlist[$i]};
5043                 next if !%co;
5044                 my $commit = $co{'id'};
5045                 my $ref = format_ref_marker($refs, $commit);
5046                 my %ad = parse_date($co{'author_epoch'});
5047                 git_print_header_div('commit',
5048                                "<span class=\"age\">$co{'age_string'}</span>" .
5049                                esc_html($co{'title'}) . $ref,
5050                                $commit);
5051                 print "<div class=\"title_text\">\n" .
5052                       "<div class=\"log_link\">\n" .
5053                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5054                       " | " .
5055                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5056                       " | " .
5057                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5058                       "<br/>\n" .
5059                       "</div>\n" .
5060                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
5061                       "</div>\n";
5062
5063                 print "<div class=\"log_body\">\n";
5064                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5065                 print "</div>\n";
5066         }
5067         if ($#commitlist >= 100) {
5068                 print "<div class=\"page_nav\">\n";
5069                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5070                                -accesskey => "n", -title => "Alt-n"}, "next");
5071                 print "</div>\n";
5072         }
5073         git_footer_html();
5074 }
5075
5076 sub git_commit {
5077         $hash ||= $hash_base || "HEAD";
5078         my %co = parse_commit($hash)
5079             or die_error(404, "Unknown commit object");
5080         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5081         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
5082
5083         my $parent  = $co{'parent'};
5084         my $parents = $co{'parents'}; # listref
5085
5086         # we need to prepare $formats_nav before any parameter munging
5087         my $formats_nav;
5088         if (!defined $parent) {
5089                 # --root commitdiff
5090                 $formats_nav .= '(initial)';
5091         } elsif (@$parents == 1) {
5092                 # single parent commit
5093                 $formats_nav .=
5094                         '(parent: ' .
5095                         $cgi->a({-href => href(action=>"commit",
5096                                                hash=>$parent)},
5097                                 esc_html(substr($parent, 0, 7))) .
5098                         ')';
5099         } else {
5100                 # merge commit
5101                 $formats_nav .=
5102                         '(merge: ' .
5103                         join(' ', map {
5104                                 $cgi->a({-href => href(action=>"commit",
5105                                                        hash=>$_)},
5106                                         esc_html(substr($_, 0, 7)));
5107                         } @$parents ) .
5108                         ')';
5109         }
5110         if (gitweb_check_feature('patches')) {
5111                 $formats_nav .= " | " .
5112                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5113                                 "patch");
5114         }
5115
5116         if (!defined $parent) {
5117                 $parent = "--root";
5118         }
5119         my @difftree;
5120         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5121                 @diff_opts,
5122                 (@$parents <= 1 ? $parent : '-c'),
5123                 $hash, "--"
5124                 or die_error(500, "Open git-diff-tree failed");
5125         @difftree = map { chomp; $_ } <$fd>;
5126         close $fd or die_error(404, "Reading git-diff-tree failed");
5127
5128         # non-textual hash id's can be cached
5129         my $expires;
5130         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5131                 $expires = "+1d";
5132         }
5133         my $refs = git_get_references();
5134         my $ref = format_ref_marker($refs, $co{'id'});
5135
5136         git_header_html(undef, $expires);
5137         git_print_page_nav('commit', '',
5138                            $hash, $co{'tree'}, $hash,
5139                            $formats_nav);
5140
5141         if (defined $co{'parent'}) {
5142                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5143         } else {
5144                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5145         }
5146         print "<div class=\"title_text\">\n" .
5147               "<table class=\"object_header\">\n";
5148         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
5149               "<tr>" .
5150               "<td></td><td> $ad{'rfc2822'}";
5151         if ($ad{'hour_local'} < 6) {
5152                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
5153                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5154         } else {
5155                 printf(" (%02d:%02d %s)",
5156                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5157         }
5158         print "</td>" .
5159               "</tr>\n";
5160         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
5161         print "<tr><td></td><td> $cd{'rfc2822'}" .
5162               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
5163               "</td></tr>\n";
5164         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5165         print "<tr>" .
5166               "<td>tree</td>" .
5167               "<td class=\"sha1\">" .
5168               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5169                        class => "list"}, $co{'tree'}) .
5170               "</td>" .
5171               "<td class=\"link\">" .
5172               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5173                       "tree");
5174         my $snapshot_links = format_snapshot_links($hash);
5175         if (defined $snapshot_links) {
5176                 print " | " . $snapshot_links;
5177         }
5178         print "</td>" .
5179               "</tr>\n";
5180
5181         foreach my $par (@$parents) {
5182                 print "<tr>" .
5183                       "<td>parent</td>" .
5184                       "<td class=\"sha1\">" .
5185                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5186                                class => "list"}, $par) .
5187                       "</td>" .
5188                       "<td class=\"link\">" .
5189                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5190                       " | " .
5191                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5192                       "</td>" .
5193                       "</tr>\n";
5194         }
5195         print "</table>".
5196               "</div>\n";
5197
5198         print "<div class=\"page_body\">\n";
5199         git_print_log($co{'comment'});
5200         print "</div>\n";
5201
5202         git_difftree_body(\@difftree, $hash, @$parents);
5203
5204         git_footer_html();
5205 }
5206
5207 sub git_object {
5208         # object is defined by:
5209         # - hash or hash_base alone
5210         # - hash_base and file_name
5211         my $type;
5212
5213         # - hash or hash_base alone
5214         if ($hash || ($hash_base && !defined $file_name)) {
5215                 my $object_id = $hash || $hash_base;
5216
5217                 open my $fd, "-|", quote_command(
5218                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5219                         or die_error(404, "Object does not exist");
5220                 $type = <$fd>;
5221                 chomp $type;
5222                 close $fd
5223                         or die_error(404, "Object does not exist");
5224
5225         # - hash_base and file_name
5226         } elsif ($hash_base && defined $file_name) {
5227                 $file_name =~ s,/+$,,;
5228
5229                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5230                         or die_error(404, "Base object does not exist");
5231
5232                 # here errors should not hapen
5233                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5234                         or die_error(500, "Open git-ls-tree failed");
5235                 my $line = <$fd>;
5236                 close $fd;
5237
5238                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5239                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5240                         die_error(404, "File or directory for given base does not exist");
5241                 }
5242                 $type = $2;
5243                 $hash = $3;
5244         } else {
5245                 die_error(400, "Not enough information to find object");
5246         }
5247
5248         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5249                                           hash=>$hash, hash_base=>$hash_base,
5250                                           file_name=>$file_name),
5251                              -status => '302 Found');
5252 }
5253
5254 sub git_blobdiff {
5255         my $format = shift || 'html';
5256
5257         my $fd;
5258         my @difftree;
5259         my %diffinfo;
5260         my $expires;
5261
5262         # preparing $fd and %diffinfo for git_patchset_body
5263         # new style URI
5264         if (defined $hash_base && defined $hash_parent_base) {
5265                 if (defined $file_name) {
5266                         # read raw output
5267                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5268                                 $hash_parent_base, $hash_base,
5269                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5270                                 or die_error(500, "Open git-diff-tree failed");
5271                         @difftree = map { chomp; $_ } <$fd>;
5272                         close $fd
5273                                 or die_error(404, "Reading git-diff-tree failed");
5274                         @difftree
5275                                 or die_error(404, "Blob diff not found");
5276
5277                 } elsif (defined $hash &&
5278                          $hash =~ /[0-9a-fA-F]{40}/) {
5279                         # try to find filename from $hash
5280
5281                         # read filtered raw output
5282                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5283                                 $hash_parent_base, $hash_base, "--"
5284                                 or die_error(500, "Open git-diff-tree failed");
5285                         @difftree =
5286                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5287                                 # $hash == to_id
5288                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5289                                 map { chomp; $_ } <$fd>;
5290                         close $fd
5291                                 or die_error(404, "Reading git-diff-tree failed");
5292                         @difftree
5293                                 or die_error(404, "Blob diff not found");
5294
5295                 } else {
5296                         die_error(400, "Missing one of the blob diff parameters");
5297                 }
5298
5299                 if (@difftree > 1) {
5300                         die_error(400, "Ambiguous blob diff specification");
5301                 }
5302
5303                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5304                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5305                 $file_name   ||= $diffinfo{'to_file'};
5306
5307                 $hash_parent ||= $diffinfo{'from_id'};
5308                 $hash        ||= $diffinfo{'to_id'};
5309
5310                 # non-textual hash id's can be cached
5311                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5312                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5313                         $expires = '+1d';
5314                 }
5315
5316                 # open patch output
5317                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5318                         '-p', ($format eq 'html' ? "--full-index" : ()),
5319                         $hash_parent_base, $hash_base,
5320                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5321                         or die_error(500, "Open git-diff-tree failed");
5322         }
5323
5324         # old/legacy style URI -- not generated anymore since 1.4.3.
5325         if (!%diffinfo) {
5326                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5327         }
5328
5329         # header
5330         if ($format eq 'html') {
5331                 my $formats_nav =
5332                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5333                                 "raw");
5334                 git_header_html(undef, $expires);
5335                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5336                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5337                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5338                 } else {
5339                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5340                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5341                 }
5342                 if (defined $file_name) {
5343                         git_print_page_path($file_name, "blob", $hash_base);
5344                 } else {
5345                         print "<div class=\"page_path\"></div>\n";
5346                 }
5347
5348         } elsif ($format eq 'plain') {
5349                 print $cgi->header(
5350                         -type => 'text/plain',
5351                         -charset => 'utf-8',
5352                         -expires => $expires,
5353                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5354
5355                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5356
5357         } else {
5358                 die_error(400, "Unknown blobdiff format");
5359         }
5360
5361         # patch
5362         if ($format eq 'html') {
5363                 print "<div class=\"page_body\">\n";
5364
5365                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5366                 close $fd;
5367
5368                 print "</div>\n"; # class="page_body"
5369                 git_footer_html();
5370
5371         } else {
5372                 while (my $line = <$fd>) {
5373                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5374                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5375
5376                         print $line;
5377
5378                         last if $line =~ m!^\+\+\+!;
5379                 }
5380                 local $/ = undef;
5381                 print <$fd>;
5382                 close $fd;
5383         }
5384 }
5385
5386 sub git_blobdiff_plain {
5387         git_blobdiff('plain');
5388 }
5389
5390 sub git_commitdiff {
5391         my %params = @_;
5392         my $format = $params{-format} || 'html';
5393
5394         my ($patch_max) = gitweb_get_feature('patches');
5395         if ($format eq 'patch') {
5396                 die_error(403, "Patch view not allowed") unless $patch_max;
5397         }
5398
5399         $hash ||= $hash_base || "HEAD";
5400         my %co = parse_commit($hash)
5401             or die_error(404, "Unknown commit object");
5402
5403         # choose format for commitdiff for merge
5404         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5405                 $hash_parent = '--cc';
5406         }
5407         # we need to prepare $formats_nav before almost any parameter munging
5408         my $formats_nav;
5409         if ($format eq 'html') {
5410                 $formats_nav =
5411                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5412                                 "raw");
5413                 if ($patch_max) {
5414                         $formats_nav .= " | " .
5415                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5416                                         "patch");
5417                 }
5418
5419                 if (defined $hash_parent &&
5420                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5421                         # commitdiff with two commits given
5422                         my $hash_parent_short = $hash_parent;
5423                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5424                                 $hash_parent_short = substr($hash_parent, 0, 7);
5425                         }
5426                         $formats_nav .=
5427                                 ' (from';
5428                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5429                                 if ($co{'parents'}[$i] eq $hash_parent) {
5430                                         $formats_nav .= ' parent ' . ($i+1);
5431                                         last;
5432                                 }
5433                         }
5434                         $formats_nav .= ': ' .
5435                                 $cgi->a({-href => href(action=>"commitdiff",
5436                                                        hash=>$hash_parent)},
5437                                         esc_html($hash_parent_short)) .
5438                                 ')';
5439                 } elsif (!$co{'parent'}) {
5440                         # --root commitdiff
5441                         $formats_nav .= ' (initial)';
5442                 } elsif (scalar @{$co{'parents'}} == 1) {
5443                         # single parent commit
5444                         $formats_nav .=
5445                                 ' (parent: ' .
5446                                 $cgi->a({-href => href(action=>"commitdiff",
5447                                                        hash=>$co{'parent'})},
5448                                         esc_html(substr($co{'parent'}, 0, 7))) .
5449                                 ')';
5450                 } else {
5451                         # merge commit
5452                         if ($hash_parent eq '--cc') {
5453                                 $formats_nav .= ' | ' .
5454                                         $cgi->a({-href => href(action=>"commitdiff",
5455                                                                hash=>$hash, hash_parent=>'-c')},
5456                                                 'combined');
5457                         } else { # $hash_parent eq '-c'
5458                                 $formats_nav .= ' | ' .
5459                                         $cgi->a({-href => href(action=>"commitdiff",
5460                                                                hash=>$hash, hash_parent=>'--cc')},
5461                                                 'compact');
5462                         }
5463                         $formats_nav .=
5464                                 ' (merge: ' .
5465                                 join(' ', map {
5466                                         $cgi->a({-href => href(action=>"commitdiff",
5467                                                                hash=>$_)},
5468                                                 esc_html(substr($_, 0, 7)));
5469                                 } @{$co{'parents'}} ) .
5470                                 ')';
5471                 }
5472         }
5473
5474         my $hash_parent_param = $hash_parent;
5475         if (!defined $hash_parent_param) {
5476                 # --cc for multiple parents, --root for parentless
5477                 $hash_parent_param =
5478                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5479         }
5480
5481         # read commitdiff
5482         my $fd;
5483         my @difftree;
5484         if ($format eq 'html') {
5485                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5486                         "--no-commit-id", "--patch-with-raw", "--full-index",
5487                         $hash_parent_param, $hash, "--"
5488                         or die_error(500, "Open git-diff-tree failed");
5489
5490                 while (my $line = <$fd>) {
5491                         chomp $line;
5492                         # empty line ends raw part of diff-tree output
5493                         last unless $line;
5494                         push @difftree, scalar parse_difftree_raw_line($line);
5495                 }
5496
5497         } elsif ($format eq 'plain') {
5498                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5499                         '-p', $hash_parent_param, $hash, "--"
5500                         or die_error(500, "Open git-diff-tree failed");
5501         } elsif ($format eq 'patch') {
5502                 # For commit ranges, we limit the output to the number of
5503                 # patches specified in the 'patches' feature.
5504                 # For single commits, we limit the output to a single patch,
5505                 # diverging from the git-format-patch default.
5506                 my @commit_spec = ();
5507                 if ($hash_parent) {
5508                         if ($patch_max > 0) {
5509                                 push @commit_spec, "-$patch_max";
5510                         }
5511                         push @commit_spec, '-n', "$hash_parent..$hash";
5512                 } else {
5513                         if ($params{-single}) {
5514                                 push @commit_spec, '-1';
5515                         } else {
5516                                 if ($patch_max > 0) {
5517                                         push @commit_spec, "-$patch_max";
5518                                 }
5519                                 push @commit_spec, "-n";
5520                         }
5521                         push @commit_spec, '--root', $hash;
5522                 }
5523                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5524                         '--stdout', @commit_spec
5525                         or die_error(500, "Open git-format-patch failed");
5526         } else {
5527                 die_error(400, "Unknown commitdiff format");
5528         }
5529
5530         # non-textual hash id's can be cached
5531         my $expires;
5532         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5533                 $expires = "+1d";
5534         }
5535
5536         # write commit message
5537         if ($format eq 'html') {
5538                 my $refs = git_get_references();
5539                 my $ref = format_ref_marker($refs, $co{'id'});
5540
5541                 git_header_html(undef, $expires);
5542                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5543                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5544                 git_print_authorship(\%co);
5545                 print "<div class=\"page_body\">\n";
5546                 if (@{$co{'comment'}} > 1) {
5547                         print "<div class=\"log\">\n";
5548                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5549                         print "</div>\n"; # class="log"
5550                 }
5551
5552         } elsif ($format eq 'plain') {
5553                 my $refs = git_get_references("tags");
5554                 my $tagname = git_get_rev_name_tags($hash);
5555                 my $filename = basename($project) . "-$hash.patch";
5556
5557                 print $cgi->header(
5558                         -type => 'text/plain',
5559                         -charset => 'utf-8',
5560                         -expires => $expires,
5561                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5562                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5563                 print "From: " . to_utf8($co{'author'}) . "\n";
5564                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5565                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5566
5567                 print "X-Git-Tag: $tagname\n" if $tagname;
5568                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5569
5570                 foreach my $line (@{$co{'comment'}}) {
5571                         print to_utf8($line) . "\n";
5572                 }
5573                 print "---\n\n";
5574         } elsif ($format eq 'patch') {
5575                 my $filename = basename($project) . "-$hash.patch";
5576
5577                 print $cgi->header(
5578                         -type => 'text/plain',
5579                         -charset => 'utf-8',
5580                         -expires => $expires,
5581                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5582         }
5583
5584         # write patch
5585         if ($format eq 'html') {
5586                 my $use_parents = !defined $hash_parent ||
5587                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5588                 git_difftree_body(\@difftree, $hash,
5589                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5590                 print "<br/>\n";
5591
5592                 git_patchset_body($fd, \@difftree, $hash,
5593                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5594                 close $fd;
5595                 print "</div>\n"; # class="page_body"
5596                 git_footer_html();
5597
5598         } elsif ($format eq 'plain') {
5599                 local $/ = undef;
5600                 print <$fd>;
5601                 close $fd
5602                         or print "Reading git-diff-tree failed\n";
5603         } elsif ($format eq 'patch') {
5604                 local $/ = undef;
5605                 print <$fd>;
5606                 close $fd
5607                         or print "Reading git-format-patch failed\n";
5608         }
5609 }
5610
5611 sub git_commitdiff_plain {
5612         git_commitdiff(-format => 'plain');
5613 }
5614
5615 # format-patch-style patches
5616 sub git_patch {
5617         git_commitdiff(-format => 'patch', -single=> 1);
5618 }
5619
5620 sub git_patches {
5621         git_commitdiff(-format => 'patch');
5622 }
5623
5624 sub git_history {
5625         if (!defined $hash_base) {
5626                 $hash_base = git_get_head_hash($project);
5627         }
5628         if (!defined $page) {
5629                 $page = 0;
5630         }
5631         my $ftype;
5632         my %co = parse_commit($hash_base)
5633             or die_error(404, "Unknown commit object");
5634
5635         my $refs = git_get_references();
5636         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5637
5638         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5639                                        $file_name, "--full-history")
5640             or die_error(404, "No such file or directory on given branch");
5641
5642         if (!defined $hash && defined $file_name) {
5643                 # some commits could have deleted file in question,
5644                 # and not have it in tree, but one of them has to have it
5645                 for (my $i = 0; $i <= @commitlist; $i++) {
5646                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5647                         last if defined $hash;
5648                 }
5649         }
5650         if (defined $hash) {
5651                 $ftype = git_get_type($hash);
5652         }
5653         if (!defined $ftype) {
5654                 die_error(500, "Unknown type of object");
5655         }
5656
5657         my $paging_nav = '';
5658         if ($page > 0) {
5659                 $paging_nav .=
5660                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5661                                                file_name=>$file_name)},
5662                                 "first");
5663                 $paging_nav .= " &sdot; " .
5664                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5665                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5666         } else {
5667                 $paging_nav .= "first";
5668                 $paging_nav .= " &sdot; prev";
5669         }
5670         my $next_link = '';
5671         if ($#commitlist >= 100) {
5672                 $next_link =
5673                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5674                                  -accesskey => "n", -title => "Alt-n"}, "next");
5675                 $paging_nav .= " &sdot; $next_link";
5676         } else {
5677                 $paging_nav .= " &sdot; next";
5678         }
5679
5680         git_header_html();
5681         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5682         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5683         git_print_page_path($file_name, $ftype, $hash_base);
5684
5685         git_history_body(\@commitlist, 0, 99,
5686                          $refs, $hash_base, $ftype, $next_link);
5687
5688         git_footer_html();
5689 }
5690
5691 sub git_search {
5692         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5693         if (!defined $searchtext) {
5694                 die_error(400, "Text field is empty");
5695         }
5696         if (!defined $hash) {
5697                 $hash = git_get_head_hash($project);
5698         }
5699         my %co = parse_commit($hash);
5700         if (!%co) {
5701                 die_error(404, "Unknown commit object");
5702         }
5703         if (!defined $page) {
5704                 $page = 0;
5705         }
5706
5707         $searchtype ||= 'commit';
5708         if ($searchtype eq 'pickaxe') {
5709                 # pickaxe may take all resources of your box and run for several minutes
5710                 # with every query - so decide by yourself how public you make this feature
5711                 gitweb_check_feature('pickaxe')
5712                     or die_error(403, "Pickaxe is disabled");
5713         }
5714         if ($searchtype eq 'grep') {
5715                 gitweb_check_feature('grep')[0]
5716                     or die_error(403, "Grep is disabled");
5717         }
5718
5719         git_header_html();
5720
5721         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5722                 my $greptype;
5723                 if ($searchtype eq 'commit') {
5724                         $greptype = "--grep=";
5725                 } elsif ($searchtype eq 'author') {
5726                         $greptype = "--author=";
5727                 } elsif ($searchtype eq 'committer') {
5728                         $greptype = "--committer=";
5729                 }
5730                 $greptype .= $searchtext;
5731                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5732                                                $greptype, '--regexp-ignore-case',
5733                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5734
5735                 my $paging_nav = '';
5736                 if ($page > 0) {
5737                         $paging_nav .=
5738                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5739                                                        searchtext=>$searchtext,
5740                                                        searchtype=>$searchtype)},
5741                                         "first");
5742                         $paging_nav .= " &sdot; " .
5743                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5744                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5745                 } else {
5746                         $paging_nav .= "first";
5747                         $paging_nav .= " &sdot; prev";
5748                 }
5749                 my $next_link = '';
5750                 if ($#commitlist >= 100) {
5751                         $next_link =
5752                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5753                                          -accesskey => "n", -title => "Alt-n"}, "next");
5754                         $paging_nav .= " &sdot; $next_link";
5755                 } else {
5756                         $paging_nav .= " &sdot; next";
5757                 }
5758
5759                 if ($#commitlist >= 100) {
5760                 }
5761
5762                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5763                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5764                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5765         }
5766
5767         if ($searchtype eq 'pickaxe') {
5768                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5769                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5770
5771                 print "<table class=\"pickaxe search\">\n";
5772                 my $alternate = 1;
5773                 $/ = "\n";
5774                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5775                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5776                         ($search_use_regexp ? '--pickaxe-regex' : ());
5777                 undef %co;
5778                 my @files;
5779                 while (my $line = <$fd>) {
5780                         chomp $line;
5781                         next unless $line;
5782
5783                         my %set = parse_difftree_raw_line($line);
5784                         if (defined $set{'commit'}) {
5785                                 # finish previous commit
5786                                 if (%co) {
5787                                         print "</td>\n" .
5788                                               "<td class=\"link\">" .
5789                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5790                                               " | " .
5791                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5792                                         print "</td>\n" .
5793                                               "</tr>\n";
5794                                 }
5795
5796                                 if ($alternate) {
5797                                         print "<tr class=\"dark\">\n";
5798                                 } else {
5799                                         print "<tr class=\"light\">\n";
5800                                 }
5801                                 $alternate ^= 1;
5802                                 %co = parse_commit($set{'commit'});
5803                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5804                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5805                                       "<td><i>$author</i></td>\n" .
5806                                       "<td>" .
5807                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5808                                               -class => "list subject"},
5809                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5810                         } elsif (defined $set{'to_id'}) {
5811                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5812
5813                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5814                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5815                                               -class => "list"},
5816                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5817                                       "<br/>\n";
5818                         }
5819                 }
5820                 close $fd;
5821
5822                 # finish last commit (warning: repetition!)
5823                 if (%co) {
5824                         print "</td>\n" .
5825                               "<td class=\"link\">" .
5826                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5827                               " | " .
5828                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5829                         print "</td>\n" .
5830                               "</tr>\n";
5831                 }
5832
5833                 print "</table>\n";
5834         }
5835
5836         if ($searchtype eq 'grep') {
5837                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5838                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5839
5840                 print "<table class=\"grep_search\">\n";
5841                 my $alternate = 1;
5842                 my $matches = 0;
5843                 $/ = "\n";
5844                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5845                         $search_use_regexp ? ('-E', '-i') : '-F',
5846                         $searchtext, $co{'tree'};
5847                 my $lastfile = '';
5848                 while (my $line = <$fd>) {
5849                         chomp $line;
5850                         my ($file, $lno, $ltext, $binary);
5851                         last if ($matches++ > 1000);
5852                         if ($line =~ /^Binary file (.+) matches$/) {
5853                                 $file = $1;
5854                                 $binary = 1;
5855                         } else {
5856                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5857                         }
5858                         if ($file ne $lastfile) {
5859                                 $lastfile and print "</td></tr>\n";
5860                                 if ($alternate++) {
5861                                         print "<tr class=\"dark\">\n";
5862                                 } else {
5863                                         print "<tr class=\"light\">\n";
5864                                 }
5865                                 print "<td class=\"list\">".
5866                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5867                                                                file_name=>"$file"),
5868                                                 -class => "list"}, esc_path($file));
5869                                 print "</td><td>\n";
5870                                 $lastfile = $file;
5871                         }
5872                         if ($binary) {
5873                                 print "<div class=\"binary\">Binary file</div>\n";
5874                         } else {
5875                                 $ltext = untabify($ltext);
5876                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5877                                         $ltext = esc_html($1, -nbsp=>1);
5878                                         $ltext .= '<span class="match">';
5879                                         $ltext .= esc_html($2, -nbsp=>1);
5880                                         $ltext .= '</span>';
5881                                         $ltext .= esc_html($3, -nbsp=>1);
5882                                 } else {
5883                                         $ltext = esc_html($ltext, -nbsp=>1);
5884                                 }
5885                                 print "<div class=\"pre\">" .
5886                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5887                                                                file_name=>"$file").'#l'.$lno,
5888                                                 -class => "linenr"}, sprintf('%4i', $lno))
5889                                         . ' ' .  $ltext . "</div>\n";
5890                         }
5891                 }
5892                 if ($lastfile) {
5893                         print "</td></tr>\n";
5894                         if ($matches > 1000) {
5895                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5896                         }
5897                 } else {
5898                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5899                 }
5900                 close $fd;
5901
5902                 print "</table>\n";
5903         }
5904         git_footer_html();
5905 }
5906
5907 sub git_search_help {
5908         git_header_html();
5909         git_print_page_nav('','', $hash,$hash,$hash);
5910         print <<EOT;
5911 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5912 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5913 the pattern entered is recognized as the POSIX extended
5914 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5915 insensitive).</p>
5916 <dl>
5917 <dt><b>commit</b></dt>
5918 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5919 EOT
5920         my $have_grep = gitweb_check_feature('grep');
5921         if ($have_grep) {
5922                 print <<EOT;
5923 <dt><b>grep</b></dt>
5924 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5925     a different one) are searched for the given pattern. On large trees, this search can take
5926 a while and put some strain on the server, so please use it with some consideration. Note that
5927 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5928 case-sensitive.</dd>
5929 EOT
5930         }
5931         print <<EOT;
5932 <dt><b>author</b></dt>
5933 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5934 <dt><b>committer</b></dt>
5935 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5936 EOT
5937         my $have_pickaxe = gitweb_check_feature('pickaxe');
5938         if ($have_pickaxe) {
5939                 print <<EOT;
5940 <dt><b>pickaxe</b></dt>
5941 <dd>All commits that caused the string to appear or disappear from any file (changes that
5942 added, removed or "modified" the string) will be listed. This search can take a while and
5943 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5944 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5945 EOT
5946         }
5947         print "</dl>\n";
5948         git_footer_html();
5949 }
5950
5951 sub git_shortlog {
5952         my $head = git_get_head_hash($project);
5953         if (!defined $hash) {
5954                 $hash = $head;
5955         }
5956         if (!defined $page) {
5957                 $page = 0;
5958         }
5959         my $refs = git_get_references();
5960
5961         my $commit_hash = $hash;
5962         if (defined $hash_parent) {
5963                 $commit_hash = "$hash_parent..$hash";
5964         }
5965         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
5966
5967         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
5968         my $next_link = '';
5969         if ($#commitlist >= 100) {
5970                 $next_link =
5971                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5972                                  -accesskey => "n", -title => "Alt-n"}, "next");
5973         }
5974         my $patch_max = gitweb_check_feature('patches');
5975         if ($patch_max) {
5976                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5977                         $paging_nav .= " &sdot; " .
5978                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5979                                         "patches");
5980                 }
5981         }
5982
5983         git_header_html();
5984         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5985         git_print_header_div('summary', $project);
5986
5987         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5988
5989         git_footer_html();
5990 }
5991
5992 ## ......................................................................
5993 ## feeds (RSS, Atom; OPML)
5994
5995 sub git_feed {
5996         my $format = shift || 'atom';
5997         my $have_blame = gitweb_check_feature('blame');
5998
5999         # Atom: http://www.atomenabled.org/developers/syndication/
6000         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6001         if ($format ne 'rss' && $format ne 'atom') {
6002                 die_error(400, "Unknown web feed format");
6003         }
6004
6005         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6006         my $head = $hash || 'HEAD';
6007         my @commitlist = parse_commits($head, 150, 0, $file_name);
6008
6009         my %latest_commit;
6010         my %latest_date;
6011         my $content_type = "application/$format+xml";
6012         if (defined $cgi->http('HTTP_ACCEPT') &&
6013                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6014                 # browser (feed reader) prefers text/xml
6015                 $content_type = 'text/xml';
6016         }
6017         if (defined($commitlist[0])) {
6018                 %latest_commit = %{$commitlist[0]};
6019                 %latest_date   = parse_date($latest_commit{'author_epoch'});
6020                 print $cgi->header(
6021                         -type => $content_type,
6022                         -charset => 'utf-8',
6023                         -last_modified => $latest_date{'rfc2822'});
6024         } else {
6025                 print $cgi->header(
6026                         -type => $content_type,
6027                         -charset => 'utf-8');
6028         }
6029
6030         # Optimization: skip generating the body if client asks only
6031         # for Last-Modified date.
6032         return if ($cgi->request_method() eq 'HEAD');
6033
6034         # header variables
6035         my $title = "$site_name - $project/$action";
6036         my $feed_type = 'log';
6037         if (defined $hash) {
6038                 $title .= " - '$hash'";
6039                 $feed_type = 'branch log';
6040                 if (defined $file_name) {
6041                         $title .= " :: $file_name";
6042                         $feed_type = 'history';
6043                 }
6044         } elsif (defined $file_name) {
6045                 $title .= " - $file_name";
6046                 $feed_type = 'history';
6047         }
6048         $title .= " $feed_type";
6049         my $descr = git_get_project_description($project);
6050         if (defined $descr) {
6051                 $descr = esc_html($descr);
6052         } else {
6053                 $descr = "$project " .
6054                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6055                          " feed";
6056         }
6057         my $owner = git_get_project_owner($project);
6058         $owner = esc_html($owner);
6059
6060         #header
6061         my $alt_url;
6062         if (defined $file_name) {
6063                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6064         } elsif (defined $hash) {
6065                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6066         } else {
6067                 $alt_url = href(-full=>1, action=>"summary");
6068         }
6069         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6070         if ($format eq 'rss') {
6071                 print <<XML;
6072 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6073 <channel>
6074 XML
6075                 print "<title>$title</title>\n" .
6076                       "<link>$alt_url</link>\n" .
6077                       "<description>$descr</description>\n" .
6078                       "<language>en</language>\n";
6079                 if (defined $logo || defined $favicon) {
6080                         # prefer the logo to the favicon, since RSS
6081                         # doesn't allow both
6082                         my $img = esc_url($logo || $favicon);
6083                         print "<image>\n" .
6084                               "<url>$img</url>\n" .
6085                               "<title>$title</title>\n" .
6086                               "<link>$alt_url</link>\n" .
6087                               "</image>\n";
6088                 }
6089                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6090         } elsif ($format eq 'atom') {
6091                 print <<XML;
6092 <feed xmlns="http://www.w3.org/2005/Atom">
6093 XML
6094                 print "<title>$title</title>\n" .
6095                       "<subtitle>$descr</subtitle>\n" .
6096                       '<link rel="alternate" type="text/html" href="' .
6097                       $alt_url . '" />' . "\n" .
6098                       '<link rel="self" type="' . $content_type . '" href="' .
6099                       $cgi->self_url() . '" />' . "\n" .
6100                       "<id>" . href(-full=>1) . "</id>\n" .
6101                       # use project owner for feed author
6102                       "<author><name>$owner</name></author>\n";
6103                 if (defined $favicon) {
6104                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6105                 }
6106                 if (defined $logo_url) {
6107                         # not twice as wide as tall: 72 x 27 pixels
6108                         print "<logo>" . esc_url($logo) . "</logo>\n";
6109                 }
6110                 if (! %latest_date) {
6111                         # dummy date to keep the feed valid until commits trickle in:
6112                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6113                 } else {
6114                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6115                 }
6116                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6117         }
6118
6119         # contents
6120         for (my $i = 0; $i <= $#commitlist; $i++) {
6121                 my %co = %{$commitlist[$i]};
6122                 my $commit = $co{'id'};
6123                 # we read 150, we always show 30 and the ones more recent than 48 hours
6124                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6125                         last;
6126                 }
6127                 my %cd = parse_date($co{'author_epoch'});
6128
6129                 # get list of changed files
6130                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6131                         $co{'parent'} || "--root",
6132                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6133                         or next;
6134                 my @difftree = map { chomp; $_ } <$fd>;
6135                 close $fd
6136                         or next;
6137
6138                 # print element (entry, item)
6139                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6140                 if ($format eq 'rss') {
6141                         print "<item>\n" .
6142                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6143                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6144                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6145                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6146                               "<link>$co_url</link>\n" .
6147                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6148                               "<content:encoded>" .
6149                               "<![CDATA[\n";
6150                 } elsif ($format eq 'atom') {
6151                         print "<entry>\n" .
6152                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6153                               "<updated>$cd{'iso-8601'}</updated>\n" .
6154                               "<author>\n" .
6155                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6156                         if ($co{'author_email'}) {
6157                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6158                         }
6159                         print "</author>\n" .
6160                               # use committer for contributor
6161                               "<contributor>\n" .
6162                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6163                         if ($co{'committer_email'}) {
6164                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6165                         }
6166                         print "</contributor>\n" .
6167                               "<published>$cd{'iso-8601'}</published>\n" .
6168                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6169                               "<id>$co_url</id>\n" .
6170                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6171                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6172                 }
6173                 my $comment = $co{'comment'};
6174                 print "<pre>\n";
6175                 foreach my $line (@$comment) {
6176                         $line = esc_html($line);
6177                         print "$line\n";
6178                 }
6179                 print "</pre><ul>\n";
6180                 foreach my $difftree_line (@difftree) {
6181                         my %difftree = parse_difftree_raw_line($difftree_line);
6182                         next if !$difftree{'from_id'};
6183
6184                         my $file = $difftree{'file'} || $difftree{'to_file'};
6185
6186                         print "<li>" .
6187                               "[" .
6188                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6189                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6190                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6191                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6192                                       -title => "diff"}, 'D');
6193                         if ($have_blame) {
6194                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6195                                                              file_name=>$file, hash_base=>$commit),
6196                                               -title => "blame"}, 'B');
6197                         }
6198                         # if this is not a feed of a file history
6199                         if (!defined $file_name || $file_name ne $file) {
6200                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6201                                                              file_name=>$file, hash=>$commit),
6202                                               -title => "history"}, 'H');
6203                         }
6204                         $file = esc_path($file);
6205                         print "] ".
6206                               "$file</li>\n";
6207                 }
6208                 if ($format eq 'rss') {
6209                         print "</ul>]]>\n" .
6210                               "</content:encoded>\n" .
6211                               "</item>\n";
6212                 } elsif ($format eq 'atom') {
6213                         print "</ul>\n</div>\n" .
6214                               "</content>\n" .
6215                               "</entry>\n";
6216                 }
6217         }
6218
6219         # end of feed
6220         if ($format eq 'rss') {
6221                 print "</channel>\n</rss>\n";
6222         }       elsif ($format eq 'atom') {
6223                 print "</feed>\n";
6224         }
6225 }
6226
6227 sub git_rss {
6228         git_feed('rss');
6229 }
6230
6231 sub git_atom {
6232         git_feed('atom');
6233 }
6234
6235 sub git_opml {
6236         my @list = git_get_projects_list();
6237
6238         print $cgi->header(
6239                 -type => 'text/xml',
6240                 -charset => 'utf-8',
6241                 -content_disposition => 'inline; filename="opml.xml"');
6242
6243         print <<XML;
6244 <?xml version="1.0" encoding="utf-8"?>
6245 <opml version="1.0">
6246 <head>
6247   <title>$site_name OPML Export</title>
6248 </head>
6249 <body>
6250 <outline text="git RSS feeds">
6251 XML
6252
6253         foreach my $pr (@list) {
6254                 my %proj = %$pr;
6255                 my $head = git_get_head_hash($proj{'path'});
6256                 if (!defined $head) {
6257                         next;
6258                 }
6259                 $git_dir = "$projectroot/$proj{'path'}";
6260                 my %co = parse_commit($head);
6261                 if (!%co) {
6262                         next;
6263                 }
6264
6265                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6266                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6267                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6268                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6269         }
6270         print <<XML;
6271 </outline>
6272 </body>
6273 </opml>
6274 XML
6275 }