gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 BEGIN {
  22         CGI->compile() if $ENV{'MOD_PERL'};
  23 }
  24
  25 our $cgi = new CGI;
  26 our $version = "++GIT_VERSION++";
  27 our $my_url = $cgi->url();
  28 our $my_uri = $cgi->url(-absolute => 1);
  29
  30 # if we're called with PATH_INFO, we have to strip that
  31 # from the URL to find our real URL
  32 # we make $path_info global because it's also used later on
  33 our $path_info = $ENV{"PATH_INFO"};
  34 if ($path_info) {
  35         $my_url =~ s,\Q$path_info\E$,,;
  36         $my_uri =~ s,\Q$path_info\E$,,;
  37 }
  38
  39 # core git executable to use
  40 # this can just be "git" if your webserver has a sensible PATH
  41 our $GIT = "++GIT_BINDIR++/git";
  42
  43 # absolute fs-path which will be prepended to the project path
  44 #our $projectroot = "/pub/scm";
  45 our $projectroot = "++GITWEB_PROJECTROOT++";
  46
  47 # fs traversing limit for getting project list
  48 # the number is relative to the projectroot
  49 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  50
  51 # target of the home link on top of all pages
  52 our $home_link = $my_uri || "/";
  53
  54 # string of the home link on top of all pages
  55 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  56
  57 # name of your site or organization to appear in page titles
  58 # replace this with something more descriptive for clearer bookmarks
  59 our $site_name = "++GITWEB_SITENAME++"
  60                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  61
  62 # filename of html text to include at top of each page
  63 our $site_header = "++GITWEB_SITE_HEADER++";
  64 # html text to include at home page
  65 our $home_text = "++GITWEB_HOMETEXT++";
  66 # filename of html text to include at bottom of each page
  67 our $site_footer = "++GITWEB_SITE_FOOTER++";
  68
  69 # URI of stylesheets
  70 our @stylesheets = ("++GITWEB_CSS++");
  71 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  72 our $stylesheet = undef;
  73 # URI of GIT logo (72x27 size)
  74 our $logo = "++GITWEB_LOGO++";
  75 # URI of GIT favicon, assumed to be image/png type
  76 our $favicon = "++GITWEB_FAVICON++";
  77
  78 # URI and label (title) of GIT logo link
  79 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  80 #our $logo_label = "git documentation";
  81 our $logo_url = "http://git.or.cz/";
  82 our $logo_label = "git homepage";
  83
  84 # source of projects list
  85 our $projects_list = "++GITWEB_LIST++";
  86
  87 # the width (in characters) of the projects list "Description" column
  88 our $projects_list_description_width = 25;
  89
  90 # default order of projects list
  91 # valid values are none, project, descr, owner, and age
  92 our $default_projects_order = "project";
  93
  94 # show repository only if this file exists
  95 # (only effective if this variable evaluates to true)
  96 our $export_ok = "++GITWEB_EXPORT_OK++";
  97
  98 # show repository only if this subroutine returns true
  99 # when given the path to the project, for example:
 100 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 101 our $export_auth_hook = undef;
 102
 103 # only allow viewing of repositories also shown on the overview page
 104 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 105
 106 # list of git base URLs used for URL to where fetch project from,
 107 # i.e. full URL is "$git_base_url/$project"
 108 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 109
 110 # default blob_plain mimetype and default charset for text/plain blob
 111 our $default_blob_plain_mimetype = 'text/plain';
 112 our $default_text_plain_charset  = undef;
 113
 114 # file to use for guessing MIME types before trying /etc/mime.types
 115 # (relative to the current git repository)
 116 our $mimetypes_file = undef;
 117
 118 # assume this charset if line contains non-UTF-8 characters;
 119 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 120 # for which encoding all byte sequences are valid, for example
 121 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 122 # could be even 'utf-8' for the old behavior)
 123 our $fallback_encoding = 'latin1';
 124
 125 # rename detection options for git-diff and git-diff-tree
 126 # - default is '-M', with the cost proportional to
 127 #   (number of removed files) * (number of new files).
 128 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 129 #   (number of changed files + number of removed files) * (number of new files)
 130 # - even more costly is '-C', '--find-copies-harder' with cost
 131 #   (number of files in the original tree) * (number of new files)
 132 # - one might want to include '-B' option, e.g. '-B', '-M'
 133 our @diff_opts = ('-M'); # taken from git_commit
 134
 135 # information about snapshot formats that gitweb is capable of serving
 136 our %known_snapshot_formats = (
 137         # name => {
 138         #       'display' => display name,
 139         #       'type' => mime type,
 140         #       'suffix' => filename suffix,
 141         #       'format' => --format for git-archive,
 142         #       'compressor' => [compressor command and arguments]
 143         #                       (array reference, optional)}
 144         #
 145         'tgz' => {
 146                 'display' => 'tar.gz',
 147                 'type' => 'application/x-gzip',
 148                 'suffix' => '.tar.gz',
 149                 'format' => 'tar',
 150                 'compressor' => ['gzip']},
 151
 152         'tbz2' => {
 153                 'display' => 'tar.bz2',
 154                 'type' => 'application/x-bzip2',
 155                 'suffix' => '.tar.bz2',
 156                 'format' => 'tar',
 157                 'compressor' => ['bzip2']},
 158
 159         'zip' => {
 160                 'display' => 'zip',
 161                 'type' => 'application/x-zip',
 162                 'suffix' => '.zip',
 163                 'format' => 'zip'},
 164 );
 165
 166 # Aliases so we understand old gitweb.snapshot values in repository
 167 # configuration.
 168 our %known_snapshot_format_aliases = (
 169         'gzip'  => 'tgz',
 170         'bzip2' => 'tbz2',
 171
 172         # backward compatibility: legacy gitweb config support
 173         'x-gzip' => undef, 'gz' => undef,
 174         'x-bzip2' => undef, 'bz2' => undef,
 175         'x-zip' => undef, '' => undef,
 176 );
 177
 178 # You define site-wide feature defaults here; override them with
 179 # $GITWEB_CONFIG as necessary.
 180 our %feature = (
 181         # feature => {
 182         #       'sub' => feature-sub (subroutine),
 183         #       'override' => allow-override (boolean),
 184         #       'default' => [ default options...] (array reference)}
 185         #
 186         # if feature is overridable (it means that allow-override has true value),
 187         # then feature-sub will be called with default options as parameters;
 188         # return value of feature-sub indicates if to enable specified feature
 189         #
 190         # if there is no 'sub' key (no feature-sub), then feature cannot be
 191         # overriden
 192         #
 193         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 194         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 195         # is enabled
 196
 197         # Enable the 'blame' blob view, showing the last commit that modified
 198         # each line in the file. This can be very CPU-intensive.
 199
 200         # To enable system wide have in $GITWEB_CONFIG
 201         # $feature{'blame'}{'default'} = [1];
 202         # To have project specific config enable override in $GITWEB_CONFIG
 203         # $feature{'blame'}{'override'} = 1;
 204         # and in project config gitweb.blame = 0|1;
 205         'blame' => {
 206                 'sub' => sub { feature_bool('blame', @_) },
 207                 'override' => 0,
 208                 'default' => [0]},
 209
 210         # Enable the 'snapshot' link, providing a compressed archive of any
 211         # tree. This can potentially generate high traffic if you have large
 212         # project.
 213
 214         # Value is a list of formats defined in %known_snapshot_formats that
 215         # you wish to offer.
 216         # To disable system wide have in $GITWEB_CONFIG
 217         # $feature{'snapshot'}{'default'} = [];
 218         # To have project specific config enable override in $GITWEB_CONFIG
 219         # $feature{'snapshot'}{'override'} = 1;
 220         # and in project config, a comma-separated list of formats or "none"
 221         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 222         'snapshot' => {
 223                 'sub' => \&feature_snapshot,
 224                 'override' => 0,
 225                 'default' => ['tgz']},
 226
 227         # Enable text search, which will list the commits which match author,
 228         # committer or commit text to a given string.  Enabled by default.
 229         # Project specific override is not supported.
 230         'search' => {
 231                 'override' => 0,
 232                 'default' => [1]},
 233
 234         # Enable grep search, which will list the files in currently selected
 235         # tree containing the given string. Enabled by default. This can be
 236         # potentially CPU-intensive, of course.
 237
 238         # To enable system wide have in $GITWEB_CONFIG
 239         # $feature{'grep'}{'default'} = [1];
 240         # To have project specific config enable override in $GITWEB_CONFIG
 241         # $feature{'grep'}{'override'} = 1;
 242         # and in project config gitweb.grep = 0|1;
 243         'grep' => {
 244                 'sub' => sub { feature_bool('grep', @_) },
 245                 'override' => 0,
 246                 'default' => [1]},
 247
 248         # Enable the pickaxe search, which will list the commits that modified
 249         # a given string in a file. This can be practical and quite faster
 250         # alternative to 'blame', but still potentially CPU-intensive.
 251
 252         # To enable system wide have in $GITWEB_CONFIG
 253         # $feature{'pickaxe'}{'default'} = [1];
 254         # To have project specific config enable override in $GITWEB_CONFIG
 255         # $feature{'pickaxe'}{'override'} = 1;
 256         # and in project config gitweb.pickaxe = 0|1;
 257         'pickaxe' => {
 258                 'sub' => sub { feature_bool('pickaxe', @_) },
 259                 'override' => 0,
 260                 'default' => [1]},
 261
 262         # Make gitweb use an alternative format of the URLs which can be
 263         # more readable and natural-looking: project name is embedded
 264         # directly in the path and the query string contains other
 265         # auxiliary information. All gitweb installations recognize
 266         # URL in either format; this configures in which formats gitweb
 267         # generates links.
 268
 269         # To enable system wide have in $GITWEB_CONFIG
 270         # $feature{'pathinfo'}{'default'} = [1];
 271         # Project specific override is not supported.
 272
 273         # Note that you will need to change the default location of CSS,
 274         # favicon, logo and possibly other files to an absolute URL. Also,
 275         # if gitweb.cgi serves as your indexfile, you will need to force
 276         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 277         'pathinfo' => {
 278                 'override' => 0,
 279                 'default' => [0]},
 280
 281         # Make gitweb consider projects in project root subdirectories
 282         # to be forks of existing projects. Given project $projname.git,
 283         # projects matching $projname/*.git will not be shown in the main
 284         # projects list, instead a '+' mark will be added to $projname
 285         # there and a 'forks' view will be enabled for the project, listing
 286         # all the forks. If project list is taken from a file, forks have
 287         # to be listed after the main project.
 288
 289         # To enable system wide have in $GITWEB_CONFIG
 290         # $feature{'forks'}{'default'} = [1];
 291         # Project specific override is not supported.
 292         'forks' => {
 293                 'override' => 0,
 294                 'default' => [0]},
 295
 296         # Insert custom links to the action bar of all project pages.
 297         # This enables you mainly to link to third-party scripts integrating
 298         # into gitweb; e.g. git-browser for graphical history representation
 299         # or custom web-based repository administration interface.
 300
 301         # The 'default' value consists of a list of triplets in the form
 302         # (label, link, position) where position is the label after which
 303         # to insert the link and link is a format string where %n expands
 304         # to the project name, %f to the project path within the filesystem,
 305         # %h to the current hash (h gitweb parameter) and %b to the current
 306         # hash base (hb gitweb parameter); %% expands to %.
 307
 308         # To enable system wide have in $GITWEB_CONFIG e.g.
 309         # $feature{'actions'}{'default'} = [('graphiclog',
 310         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 311         # Project specific override is not supported.
 312         'actions' => {
 313                 'override' => 0,
 314                 'default' => []},
 315
 316         # Allow gitweb scan project content tags described in ctags/
 317         # of project repository, and display the popular Web 2.0-ish
 318         # "tag cloud" near the project list. Note that this is something
 319         # COMPLETELY different from the normal Git tags.
 320
 321         # gitweb by itself can show existing tags, but it does not handle
 322         # tagging itself; you need an external application for that.
 323         # For an example script, check Girocco's cgi/tagproj.cgi.
 324         # You may want to install the HTML::TagCloud Perl module to get
 325         # a pretty tag cloud instead of just a list of tags.
 326
 327         # To enable system wide have in $GITWEB_CONFIG
 328         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 329         # Project specific override is not supported.
 330         'ctags' => {
 331                 'override' => 0,
 332                 'default' => [0]},
 333
 334         # The maximum number of patches in a patchset generated in patch
 335         # view. Set this to 0 or undef to disable patch view, or to a
 336         # negative number to remove any limit.
 337
 338         # To disable system wide have in $GITWEB_CONFIG
 339         # $feature{'patches'}{'default'} = [0];
 340         # To have project specific config enable override in $GITWEB_CONFIG
 341         # $feature{'patches'}{'override'} = 1;
 342         # and in project config gitweb.patches = 0|n;
 343         # where n is the maximum number of patches allowed in a patchset.
 344         'patches' => {
 345                 'sub' => \&feature_patches,
 346                 'override' => 0,
 347                 'default' => [16]},
 348 );
 349
 350 sub gitweb_get_feature {
 351         my ($name) = @_;
 352         return unless exists $feature{$name};
 353         my ($sub, $override, @defaults) = (
 354                 $feature{$name}{'sub'},
 355                 $feature{$name}{'override'},
 356                 @{$feature{$name}{'default'}});
 357         if (!$override) { return @defaults; }
 358         if (!defined $sub) {
 359                 warn "feature $name is not overrideable";
 360                 return @defaults;
 361         }
 362         return $sub->(@defaults);
 363 }
 364
 365 # A wrapper to check if a given feature is enabled.
 366 # With this, you can say
 367 #
 368 #   my $bool_feat = gitweb_check_feature('bool_feat');
 369 #   gitweb_check_feature('bool_feat') or somecode;
 370 #
 371 # instead of
 372 #
 373 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 374 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 375 #
 376 sub gitweb_check_feature {
 377         return (gitweb_get_feature(@_))[0];
 378 }
 379
 380
 381 sub feature_bool {
 382         my $key = shift;
 383         my ($val) = git_get_project_config($key, '--bool');
 384
 385         if ($val eq 'true') {
 386                 return (1);
 387         } elsif ($val eq 'false') {
 388                 return (0);
 389         }
 390
 391         return ($_[0]);
 392 }
 393
 394 sub feature_snapshot {
 395         my (@fmts) = @_;
 396
 397         my ($val) = git_get_project_config('snapshot');
 398
 399         if ($val) {
 400                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 401         }
 402
 403         return @fmts;
 404 }
 405
 406 sub feature_patches {
 407         my @val = (git_get_project_config('patches', '--int'));
 408
 409         if (@val) {
 410                 return @val;
 411         }
 412
 413         return ($_[0]);
 414 }
 415
 416 # checking HEAD file with -e is fragile if the repository was
 417 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 418 # and then pruned.
 419 sub check_head_link {
 420         my ($dir) = @_;
 421         my $headfile = "$dir/HEAD";
 422         return ((-e $headfile) ||
 423                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 424 }
 425
 426 sub check_export_ok {
 427         my ($dir) = @_;
 428         return (check_head_link($dir) &&
 429                 (!$export_ok || -e "$dir/$export_ok") &&
 430                 (!$export_auth_hook || $export_auth_hook->($dir)));
 431 }
 432
 433 # process alternate names for backward compatibility
 434 # filter out unsupported (unknown) snapshot formats
 435 sub filter_snapshot_fmts {
 436         my @fmts = @_;
 437
 438         @fmts = map {
 439                 exists $known_snapshot_format_aliases{$_} ?
 440                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 441         @fmts = grep(exists $known_snapshot_formats{$_}, @fmts);
 442
 443 }
 444
 445 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 446 if (-e $GITWEB_CONFIG) {
 447         do $GITWEB_CONFIG;
 448 } else {
 449         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 450         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 451 }
 452
 453 # version of the core git binary
 454 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 455
 456 $projects_list ||= $projectroot;
 457
 458 # ======================================================================
 459 # input validation and dispatch
 460
 461 # input parameters can be collected from a variety of sources (presently, CGI
 462 # and PATH_INFO), so we define an %input_params hash that collects them all
 463 # together during validation: this allows subsequent uses (e.g. href()) to be
 464 # agnostic of the parameter origin
 465
 466 our %input_params = ();
 467
 468 # input parameters are stored with the long parameter name as key. This will
 469 # also be used in the href subroutine to convert parameters to their CGI
 470 # equivalent, and since the href() usage is the most frequent one, we store
 471 # the name -> CGI key mapping here, instead of the reverse.
 472 #
 473 # XXX: Warning: If you touch this, check the search form for updating,
 474 # too.
 475
 476 our @cgi_param_mapping = (
 477         project => "p",
 478         action => "a",
 479         file_name => "f",
 480         file_parent => "fp",
 481         hash => "h",
 482         hash_parent => "hp",
 483         hash_base => "hb",
 484         hash_parent_base => "hpb",
 485         page => "pg",
 486         order => "o",
 487         searchtext => "s",
 488         searchtype => "st",
 489         snapshot_format => "sf",
 490         extra_options => "opt",
 491         search_use_regexp => "sr",
 492 );
 493 our %cgi_param_mapping = @cgi_param_mapping;
 494
 495 # we will also need to know the possible actions, for validation
 496 our %actions = (
 497         "blame" => \&git_blame,
 498         "blobdiff" => \&git_blobdiff,
 499         "blobdiff_plain" => \&git_blobdiff_plain,
 500         "blob" => \&git_blob,
 501         "blob_plain" => \&git_blob_plain,
 502         "commitdiff" => \&git_commitdiff,
 503         "commitdiff_plain" => \&git_commitdiff_plain,
 504         "commit" => \&git_commit,
 505         "forks" => \&git_forks,
 506         "heads" => \&git_heads,
 507         "history" => \&git_history,
 508         "log" => \&git_log,
 509         "patch" => \&git_patch,
 510         "patches" => \&git_patches,
 511         "rss" => \&git_rss,
 512         "atom" => \&git_atom,
 513         "search" => \&git_search,
 514         "search_help" => \&git_search_help,
 515         "shortlog" => \&git_shortlog,
 516         "summary" => \&git_summary,
 517         "tag" => \&git_tag,
 518         "tags" => \&git_tags,
 519         "tree" => \&git_tree,
 520         "snapshot" => \&git_snapshot,
 521         "object" => \&git_object,
 522         # those below don't need $project
 523         "opml" => \&git_opml,
 524         "project_list" => \&git_project_list,
 525         "project_index" => \&git_project_index,
 526 );
 527
 528 # finally, we have the hash of allowed extra_options for the commands that
 529 # allow them
 530 our %allowed_options = (
 531         "--no-merges" => [ qw(rss atom log shortlog history) ],
 532 );
 533
 534 # fill %input_params with the CGI parameters. All values except for 'opt'
 535 # should be single values, but opt can be an array. We should probably
 536 # build an array of parameters that can be multi-valued, but since for the time
 537 # being it's only this one, we just single it out
 538 while (my ($name, $symbol) = each %cgi_param_mapping) {
 539         if ($symbol eq 'opt') {
 540                 $input_params{$name} = [ $cgi->param($symbol) ];
 541         } else {
 542                 $input_params{$name} = $cgi->param($symbol);
 543         }
 544 }
 545
 546 # now read PATH_INFO and update the parameter list for missing parameters
 547 sub evaluate_path_info {
 548         return if defined $input_params{'project'};
 549         return if !$path_info;
 550         $path_info =~ s,^/+,,;
 551         return if !$path_info;
 552
 553         # find which part of PATH_INFO is project
 554         my $project = $path_info;
 555         $project =~ s,/+$,,;
 556         while ($project && !check_head_link("$projectroot/$project")) {
 557                 $project =~ s,/*[^/]*$,,;
 558         }
 559         return unless $project;
 560         $input_params{'project'} = $project;
 561
 562         # do not change any parameters if an action is given using the query string
 563         return if $input_params{'action'};
 564         $path_info =~ s,^\Q$project\E/*,,;
 565
 566         # next, check if we have an action
 567         my $action = $path_info;
 568         $action =~ s,/.*$,,;
 569         if (exists $actions{$action}) {
 570                 $path_info =~ s,^$action/*,,;
 571                 $input_params{'action'} = $action;
 572         }
 573
 574         # list of actions that want hash_base instead of hash, but can have no
 575         # pathname (f) parameter
 576         my @wants_base = (
 577                 'tree',
 578                 'history',
 579         );
 580
 581         # we want to catch
 582         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 583         my ($parentrefname, $parentpathname, $refname, $pathname) =
 584                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 585
 586         # first, analyze the 'current' part
 587         if (defined $pathname) {
 588                 # we got "branch:filename" or "branch:dir/"
 589                 # we could use git_get_type(branch:pathname), but:
 590                 # - it needs $git_dir
 591                 # - it does a git() call
 592                 # - the convention of terminating directories with a slash
 593                 #   makes it superfluous
 594                 # - embedding the action in the PATH_INFO would make it even
 595                 #   more superfluous
 596                 $pathname =~ s,^/+,,;
 597                 if (!$pathname || substr($pathname, -1) eq "/") {
 598                         $input_params{'action'} ||= "tree";
 599                         $pathname =~ s,/$,,;
 600                 } else {
 601                         # the default action depends on whether we had parent info
 602                         # or not
 603                         if ($parentrefname) {
 604                                 $input_params{'action'} ||= "blobdiff_plain";
 605                         } else {
 606                                 $input_params{'action'} ||= "blob_plain";
 607                         }
 608                 }
 609                 $input_params{'hash_base'} ||= $refname;
 610                 $input_params{'file_name'} ||= $pathname;
 611         } elsif (defined $refname) {
 612                 # we got "branch". In this case we have to choose if we have to
 613                 # set hash or hash_base.
 614                 #
 615                 # Most of the actions without a pathname only want hash to be
 616                 # set, except for the ones specified in @wants_base that want
 617                 # hash_base instead. It should also be noted that hand-crafted
 618                 # links having 'history' as an action and no pathname or hash
 619                 # set will fail, but that happens regardless of PATH_INFO.
 620                 $input_params{'action'} ||= "shortlog";
 621                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 622                         $input_params{'hash_base'} ||= $refname;
 623                 } else {
 624                         $input_params{'hash'} ||= $refname;
 625                 }
 626         }
 627
 628         # next, handle the 'parent' part, if present
 629         if (defined $parentrefname) {
 630                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 631                 # someproject/blobdiff/oldrev..newrev:/filename
 632                 if ($parentpathname) {
 633                         $parentpathname =~ s,^/+,,;
 634                         $parentpathname =~ s,/$,,;
 635                         $input_params{'file_parent'} ||= $parentpathname;
 636                 } else {
 637                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 638                 }
 639                 # we assume that hash_parent_base is wanted if a path was specified,
 640                 # or if the action wants hash_base instead of hash
 641                 if (defined $input_params{'file_parent'} ||
 642                         grep { $_ eq $input_params{'action'} } @wants_base) {
 643                         $input_params{'hash_parent_base'} ||= $parentrefname;
 644                 } else {
 645                         $input_params{'hash_parent'} ||= $parentrefname;
 646                 }
 647         }
 648
 649         # for the snapshot action, we allow URLs in the form
 650         # $project/snapshot/$hash.ext
 651         # where .ext determines the snapshot and gets removed from the
 652         # passed $refname to provide the $hash.
 653         #
 654         # To be able to tell that $refname includes the format extension, we
 655         # require the following two conditions to be satisfied:
 656         # - the hash input parameter MUST have been set from the $refname part
 657         #   of the URL (i.e. they must be equal)
 658         # - the snapshot format MUST NOT have been defined already (e.g. from
 659         #   CGI parameter sf)
 660         # It's also useless to try any matching unless $refname has a dot,
 661         # so we check for that too
 662         if (defined $input_params{'action'} &&
 663                 $input_params{'action'} eq 'snapshot' &&
 664                 defined $refname && index($refname, '.') != -1 &&
 665                 $refname eq $input_params{'hash'} &&
 666                 !defined $input_params{'snapshot_format'}) {
 667                 # We loop over the known snapshot formats, checking for
 668                 # extensions. Allowed extensions are both the defined suffix
 669                 # (which includes the initial dot already) and the snapshot
 670                 # format key itself, with a prepended dot
 671                 while (my ($fmt, %opt) = each %known_snapshot_formats) {
 672                         my $hash = $refname;
 673                         my $sfx;
 674                         $hash =~ s/(\Q$opt{'suffix'}\E|\Q.$fmt\E)$//;
 675                         next unless $sfx = $1;
 676                         # a valid suffix was found, so set the snapshot format
 677                         # and reset the hash parameter
 678                         $input_params{'snapshot_format'} = $fmt;
 679                         $input_params{'hash'} = $hash;
 680                         # we also set the format suffix to the one requested
 681                         # in the URL: this way a request for e.g. .tgz returns
 682                         # a .tgz instead of a .tar.gz
 683                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 684                         last;
 685                 }
 686         }
 687 }
 688 evaluate_path_info();
 689
 690 our $action = $input_params{'action'};
 691 if (defined $action) {
 692         if (!validate_action($action)) {
 693                 die_error(400, "Invalid action parameter");
 694         }
 695 }
 696
 697 # parameters which are pathnames
 698 our $project = $input_params{'project'};
 699 if (defined $project) {
 700         if (!validate_project($project)) {
 701                 undef $project;
 702                 die_error(404, "No such project");
 703         }
 704 }
 705
 706 our $file_name = $input_params{'file_name'};
 707 if (defined $file_name) {
 708         if (!validate_pathname($file_name)) {
 709                 die_error(400, "Invalid file parameter");
 710         }
 711 }
 712
 713 our $file_parent = $input_params{'file_parent'};
 714 if (defined $file_parent) {
 715         if (!validate_pathname($file_parent)) {
 716                 die_error(400, "Invalid file parent parameter");
 717         }
 718 }
 719
 720 # parameters which are refnames
 721 our $hash = $input_params{'hash'};
 722 if (defined $hash) {
 723         if (!validate_refname($hash)) {
 724                 die_error(400, "Invalid hash parameter");
 725         }
 726 }
 727
 728 our $hash_parent = $input_params{'hash_parent'};
 729 if (defined $hash_parent) {
 730         if (!validate_refname($hash_parent)) {
 731                 die_error(400, "Invalid hash parent parameter");
 732         }
 733 }
 734
 735 our $hash_base = $input_params{'hash_base'};
 736 if (defined $hash_base) {
 737         if (!validate_refname($hash_base)) {
 738                 die_error(400, "Invalid hash base parameter");
 739         }
 740 }
 741
 742 our @extra_options = @{$input_params{'extra_options'}};
 743 # @extra_options is always defined, since it can only be (currently) set from
 744 # CGI, and $cgi->param() returns the empty array in array context if the param
 745 # is not set
 746 foreach my $opt (@extra_options) {
 747         if (not exists $allowed_options{$opt}) {
 748                 die_error(400, "Invalid option parameter");
 749         }
 750         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 751                 die_error(400, "Invalid option parameter for this action");
 752         }
 753 }
 754
 755 our $hash_parent_base = $input_params{'hash_parent_base'};
 756 if (defined $hash_parent_base) {
 757         if (!validate_refname($hash_parent_base)) {
 758                 die_error(400, "Invalid hash parent base parameter");
 759         }
 760 }
 761
 762 # other parameters
 763 our $page = $input_params{'page'};
 764 if (defined $page) {
 765         if ($page =~ m/[^0-9]/) {
 766                 die_error(400, "Invalid page parameter");
 767         }
 768 }
 769
 770 our $searchtype = $input_params{'searchtype'};
 771 if (defined $searchtype) {
 772         if ($searchtype =~ m/[^a-z]/) {
 773                 die_error(400, "Invalid searchtype parameter");
 774         }
 775 }
 776
 777 our $search_use_regexp = $input_params{'search_use_regexp'};
 778
 779 our $searchtext = $input_params{'searchtext'};
 780 our $search_regexp;
 781 if (defined $searchtext) {
 782         if (length($searchtext) < 2) {
 783                 die_error(403, "At least two characters are required for search parameter");
 784         }
 785         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 786 }
 787
 788 # path to the current git repository
 789 our $git_dir;
 790 $git_dir = "$projectroot/$project" if $project;
 791
 792 # list of supported snapshot formats
 793 our @snapshot_fmts = gitweb_get_feature('snapshot');
 794 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 795
 796 # dispatch
 797 if (!defined $action) {
 798         if (defined $hash) {
 799                 $action = git_get_type($hash);
 800         } elsif (defined $hash_base && defined $file_name) {
 801                 $action = git_get_type("$hash_base:$file_name");
 802         } elsif (defined $project) {
 803                 $action = 'summary';
 804         } else {
 805                 $action = 'project_list';
 806         }
 807 }
 808 if (!defined($actions{$action})) {
 809         die_error(400, "Unknown action");
 810 }
 811 if ($action !~ m/^(opml|project_list|project_index)$/ &&
 812     !$project) {
 813         die_error(400, "Project needed");
 814 }
 815 $actions{$action}->();
 816 exit;
 817
 818 ## ======================================================================
 819 ## action links
 820
 821 sub href (%) {
 822         my %params = @_;
 823         # default is to use -absolute url() i.e. $my_uri
 824         my $href = $params{-full} ? $my_url : $my_uri;
 825
 826         $params{'project'} = $project unless exists $params{'project'};
 827
 828         if ($params{-replay}) {
 829                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 830                         if (!exists $params{$name}) {
 831                                 $params{$name} = $input_params{$name};
 832                         }
 833                 }
 834         }
 835
 836         my $use_pathinfo = gitweb_check_feature('pathinfo');
 837         if ($use_pathinfo and defined $params{'project'}) {
 838                 # try to put as many parameters as possible in PATH_INFO:
 839                 #   - project name
 840                 #   - action
 841                 #   - hash_parent or hash_parent_base:/file_parent
 842                 #   - hash or hash_base:/filename
 843                 #   - the snapshot_format as an appropriate suffix
 844
 845                 # When the script is the root DirectoryIndex for the domain,
 846                 # $href here would be something like http://gitweb.example.com/
 847                 # Thus, we strip any trailing / from $href, to spare us double
 848                 # slashes in the final URL
 849                 $href =~ s,/$,,;
 850
 851                 # Then add the project name, if present
 852                 $href .= "/".esc_url($params{'project'});
 853                 delete $params{'project'};
 854
 855                 # since we destructively absorb parameters, we keep this
 856                 # boolean that remembers if we're handling a snapshot
 857                 my $is_snapshot = $params{'action'} eq 'snapshot';
 858
 859                 # Summary just uses the project path URL, any other action is
 860                 # added to the URL
 861                 if (defined $params{'action'}) {
 862                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
 863                         delete $params{'action'};
 864                 }
 865
 866                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
 867                 # stripping nonexistent or useless pieces
 868                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
 869                         || $params{'hash_parent'} || $params{'hash'});
 870                 if (defined $params{'hash_base'}) {
 871                         if (defined $params{'hash_parent_base'}) {
 872                                 $href .= esc_url($params{'hash_parent_base'});
 873                                 # skip the file_parent if it's the same as the file_name
 874                                 delete $params{'file_parent'} if $params{'file_parent'} eq $params{'file_name'};
 875                                 if (defined $params{'file_parent'} && $params{'file_parent'} !~ /\.\./) {
 876                                         $href .= ":/".esc_url($params{'file_parent'});
 877                                         delete $params{'file_parent'};
 878                                 }
 879                                 $href .= "..";
 880                                 delete $params{'hash_parent'};
 881                                 delete $params{'hash_parent_base'};
 882                         } elsif (defined $params{'hash_parent'}) {
 883                                 $href .= esc_url($params{'hash_parent'}). "..";
 884                                 delete $params{'hash_parent'};
 885                         }
 886
 887                         $href .= esc_url($params{'hash_base'});
 888                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
 889                                 $href .= ":/".esc_url($params{'file_name'});
 890                                 delete $params{'file_name'};
 891                         }
 892                         delete $params{'hash'};
 893                         delete $params{'hash_base'};
 894                 } elsif (defined $params{'hash'}) {
 895                         $href .= esc_url($params{'hash'});
 896                         delete $params{'hash'};
 897                 }
 898
 899                 # If the action was a snapshot, we can absorb the
 900                 # snapshot_format parameter too
 901                 if ($is_snapshot) {
 902                         my $fmt = $params{'snapshot_format'};
 903                         # snapshot_format should always be defined when href()
 904                         # is called, but just in case some code forgets, we
 905                         # fall back to the default
 906                         $fmt ||= $snapshot_fmts[0];
 907                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
 908                         delete $params{'snapshot_format'};
 909                 }
 910         }
 911
 912         # now encode the parameters explicitly
 913         my @result = ();
 914         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
 915                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
 916                 if (defined $params{$name}) {
 917                         if (ref($params{$name}) eq "ARRAY") {
 918                                 foreach my $par (@{$params{$name}}) {
 919                                         push @result, $symbol . "=" . esc_param($par);
 920                                 }
 921                         } else {
 922                                 push @result, $symbol . "=" . esc_param($params{$name});
 923                         }
 924                 }
 925         }
 926         $href .= "?" . join(';', @result) if scalar @result;
 927
 928         return $href;
 929 }
 930
 931
 932 ## ======================================================================
 933 ## validation, quoting/unquoting and escaping
 934
 935 sub validate_action {
 936         my $input = shift || return undef;
 937         return undef unless exists $actions{$input};
 938         return $input;
 939 }
 940
 941 sub validate_project {
 942         my $input = shift || return undef;
 943         if (!validate_pathname($input) ||
 944                 !(-d "$projectroot/$input") ||
 945                 !check_export_ok("$projectroot/$input") ||
 946                 ($strict_export && !project_in_list($input))) {
 947                 return undef;
 948         } else {
 949                 return $input;
 950         }
 951 }
 952
 953 sub validate_pathname {
 954         my $input = shift || return undef;
 955
 956         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 957         # at the beginning, at the end, and between slashes.
 958         # also this catches doubled slashes
 959         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 960                 return undef;
 961         }
 962         # no null characters
 963         if ($input =~ m!\0!) {
 964                 return undef;
 965         }
 966         return $input;
 967 }
 968
 969 sub validate_refname {
 970         my $input = shift || return undef;
 971
 972         # textual hashes are O.K.
 973         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 974                 return $input;
 975         }
 976         # it must be correct pathname
 977         $input = validate_pathname($input)
 978                 or return undef;
 979         # restrictions on ref name according to git-check-ref-format
 980         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
 981                 return undef;
 982         }
 983         return $input;
 984 }
 985
 986 # decode sequences of octets in utf8 into Perl's internal form,
 987 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
 988 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
 989 sub to_utf8 {
 990         my $str = shift;
 991         if (utf8::valid($str)) {
 992                 utf8::decode($str);
 993                 return $str;
 994         } else {
 995                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
 996         }
 997 }
 998
 999 # quote unsafe chars, but keep the slash, even when it's not
1000 # correct, but quoted slashes look too horrible in bookmarks
1001 sub esc_param {
1002         my $str = shift;
1003         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
1004         $str =~ s/\+/%2B/g;
1005         $str =~ s/ /\+/g;
1006         return $str;
1007 }
1008
1009 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1010 sub esc_url {
1011         my $str = shift;
1012         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1013         $str =~ s/\+/%2B/g;
1014         $str =~ s/ /\+/g;
1015         return $str;
1016 }
1017
1018 # replace invalid utf8 character with SUBSTITUTION sequence
1019 sub esc_html ($;%) {
1020         my $str = shift;
1021         my %opts = @_;
1022
1023         $str = to_utf8($str);
1024         $str = $cgi->escapeHTML($str);
1025         if ($opts{'-nbsp'}) {
1026                 $str =~ s/ /&nbsp;/g;
1027         }
1028         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1029         return $str;
1030 }
1031
1032 # quote control characters and escape filename to HTML
1033 sub esc_path {
1034         my $str = shift;
1035         my %opts = @_;
1036
1037         $str = to_utf8($str);
1038         $str = $cgi->escapeHTML($str);
1039         if ($opts{'-nbsp'}) {
1040                 $str =~ s/ /&nbsp;/g;
1041         }
1042         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1043         return $str;
1044 }
1045
1046 # Make control characters "printable", using character escape codes (CEC)
1047 sub quot_cec {
1048         my $cntrl = shift;
1049         my %opts = @_;
1050         my %es = ( # character escape codes, aka escape sequences
1051                 "\t" => '\t',   # tab            (HT)
1052                 "\n" => '\n',   # line feed      (LF)
1053                 "\r" => '\r',   # carrige return (CR)
1054                 "\f" => '\f',   # form feed      (FF)
1055                 "\b" => '\b',   # backspace      (BS)
1056                 "\a" => '\a',   # alarm (bell)   (BEL)
1057                 "\e" => '\e',   # escape         (ESC)
1058                 "\013" => '\v', # vertical tab   (VT)
1059                 "\000" => '\0', # nul character  (NUL)
1060         );
1061         my $chr = ( (exists $es{$cntrl})
1062                     ? $es{$cntrl}
1063                     : sprintf('\%2x', ord($cntrl)) );
1064         if ($opts{-nohtml}) {
1065                 return $chr;
1066         } else {
1067                 return "<span class=\"cntrl\">$chr</span>";
1068         }
1069 }
1070
1071 # Alternatively use unicode control pictures codepoints,
1072 # Unicode "printable representation" (PR)
1073 sub quot_upr {
1074         my $cntrl = shift;
1075         my %opts = @_;
1076
1077         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1078         if ($opts{-nohtml}) {
1079                 return $chr;
1080         } else {
1081                 return "<span class=\"cntrl\">$chr</span>";
1082         }
1083 }
1084
1085 # git may return quoted and escaped filenames
1086 sub unquote {
1087         my $str = shift;
1088
1089         sub unq {
1090                 my $seq = shift;
1091                 my %es = ( # character escape codes, aka escape sequences
1092                         't' => "\t",   # tab            (HT, TAB)
1093                         'n' => "\n",   # newline        (NL)
1094                         'r' => "\r",   # return         (CR)
1095                         'f' => "\f",   # form feed      (FF)
1096                         'b' => "\b",   # backspace      (BS)
1097                         'a' => "\a",   # alarm (bell)   (BEL)
1098                         'e' => "\e",   # escape         (ESC)
1099                         'v' => "\013", # vertical tab   (VT)
1100                 );
1101
1102                 if ($seq =~ m/^[0-7]{1,3}$/) {
1103                         # octal char sequence
1104                         return chr(oct($seq));
1105                 } elsif (exists $es{$seq}) {
1106                         # C escape sequence, aka character escape code
1107                         return $es{$seq};
1108                 }
1109                 # quoted ordinary character
1110                 return $seq;
1111         }
1112
1113         if ($str =~ m/^"(.*)"$/) {
1114                 # needs unquoting
1115                 $str = $1;
1116                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1117         }
1118         return $str;
1119 }
1120
1121 # escape tabs (convert tabs to spaces)
1122 sub untabify {
1123         my $line = shift;
1124
1125         while ((my $pos = index($line, "\t")) != -1) {
1126                 if (my $count = (8 - ($pos % 8))) {
1127                         my $spaces = ' ' x $count;
1128                         $line =~ s/\t/$spaces/;
1129                 }
1130         }
1131
1132         return $line;
1133 }
1134
1135 sub project_in_list {
1136         my $project = shift;
1137         my @list = git_get_projects_list();
1138         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1139 }
1140
1141 ## ----------------------------------------------------------------------
1142 ## HTML aware string manipulation
1143
1144 # Try to chop given string on a word boundary between position
1145 # $len and $len+$add_len. If there is no word boundary there,
1146 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1147 # (marking chopped part) would be longer than given string.
1148 sub chop_str {
1149         my $str = shift;
1150         my $len = shift;
1151         my $add_len = shift || 10;
1152         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1153
1154         # Make sure perl knows it is utf8 encoded so we don't
1155         # cut in the middle of a utf8 multibyte char.
1156         $str = to_utf8($str);
1157
1158         # allow only $len chars, but don't cut a word if it would fit in $add_len
1159         # if it doesn't fit, cut it if it's still longer than the dots we would add
1160         # remove chopped character entities entirely
1161
1162         # when chopping in the middle, distribute $len into left and right part
1163         # return early if chopping wouldn't make string shorter
1164         if ($where eq 'center') {
1165                 return $str if ($len + 5 >= length($str)); # filler is length 5
1166                 $len = int($len/2);
1167         } else {
1168                 return $str if ($len + 4 >= length($str)); # filler is length 4
1169         }
1170
1171         # regexps: ending and beginning with word part up to $add_len
1172         my $endre = qr/.{$len}\w{0,$add_len}/;
1173         my $begre = qr/\w{0,$add_len}.{$len}/;
1174
1175         if ($where eq 'left') {
1176                 $str =~ m/^(.*?)($begre)$/;
1177                 my ($lead, $body) = ($1, $2);
1178                 if (length($lead) > 4) {
1179                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
1180                         $lead = " ...";
1181                 }
1182                 return "$lead$body";
1183
1184         } elsif ($where eq 'center') {
1185                 $str =~ m/^($endre)(.*)$/;
1186                 my ($left, $str)  = ($1, $2);
1187                 $str =~ m/^(.*?)($begre)$/;
1188                 my ($mid, $right) = ($1, $2);
1189                 if (length($mid) > 5) {
1190                         $left  =~ s/&[^;]*$//;
1191                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
1192                         $mid = " ... ";
1193                 }
1194                 return "$left$mid$right";
1195
1196         } else {
1197                 $str =~ m/^($endre)(.*)$/;
1198                 my $body = $1;
1199                 my $tail = $2;
1200                 if (length($tail) > 4) {
1201                         $body =~ s/&[^;]*$//;
1202                         $tail = "... ";
1203                 }
1204                 return "$body$tail";
1205         }
1206 }
1207
1208 # takes the same arguments as chop_str, but also wraps a <span> around the
1209 # result with a title attribute if it does get chopped. Additionally, the
1210 # string is HTML-escaped.
1211 sub chop_and_escape_str {
1212         my ($str) = @_;
1213
1214         my $chopped = chop_str(@_);
1215         if ($chopped eq $str) {
1216                 return esc_html($chopped);
1217         } else {
1218                 $str =~ s/([[:cntrl:]])/?/g;
1219                 return $cgi->span({-title=>$str}, esc_html($chopped));
1220         }
1221 }
1222
1223 ## ----------------------------------------------------------------------
1224 ## functions returning short strings
1225
1226 # CSS class for given age value (in seconds)
1227 sub age_class {
1228         my $age = shift;
1229
1230         if (!defined $age) {
1231                 return "noage";
1232         } elsif ($age < 60*60*2) {
1233                 return "age0";
1234         } elsif ($age < 60*60*24*2) {
1235                 return "age1";
1236         } else {
1237                 return "age2";
1238         }
1239 }
1240
1241 # convert age in seconds to "nn units ago" string
1242 sub age_string {
1243         my $age = shift;
1244         my $age_str;
1245
1246         if ($age > 60*60*24*365*2) {
1247                 $age_str = (int $age/60/60/24/365);
1248                 $age_str .= " years ago";
1249         } elsif ($age > 60*60*24*(365/12)*2) {
1250                 $age_str = int $age/60/60/24/(365/12);
1251                 $age_str .= " months ago";
1252         } elsif ($age > 60*60*24*7*2) {
1253                 $age_str = int $age/60/60/24/7;
1254                 $age_str .= " weeks ago";
1255         } elsif ($age > 60*60*24*2) {
1256                 $age_str = int $age/60/60/24;
1257                 $age_str .= " days ago";
1258         } elsif ($age > 60*60*2) {
1259                 $age_str = int $age/60/60;
1260                 $age_str .= " hours ago";
1261         } elsif ($age > 60*2) {
1262                 $age_str = int $age/60;
1263                 $age_str .= " min ago";
1264         } elsif ($age > 2) {
1265                 $age_str = int $age;
1266                 $age_str .= " sec ago";
1267         } else {
1268                 $age_str .= " right now";
1269         }
1270         return $age_str;
1271 }
1272
1273 use constant {
1274         S_IFINVALID => 0030000,
1275         S_IFGITLINK => 0160000,
1276 };
1277
1278 # submodule/subproject, a commit object reference
1279 sub S_ISGITLINK($) {
1280         my $mode = shift;
1281
1282         return (($mode & S_IFMT) == S_IFGITLINK)
1283 }
1284
1285 # convert file mode in octal to symbolic file mode string
1286 sub mode_str {
1287         my $mode = oct shift;
1288
1289         if (S_ISGITLINK($mode)) {
1290                 return 'm---------';
1291         } elsif (S_ISDIR($mode & S_IFMT)) {
1292                 return 'drwxr-xr-x';
1293         } elsif (S_ISLNK($mode)) {
1294                 return 'lrwxrwxrwx';
1295         } elsif (S_ISREG($mode)) {
1296                 # git cares only about the executable bit
1297                 if ($mode & S_IXUSR) {
1298                         return '-rwxr-xr-x';
1299                 } else {
1300                         return '-rw-r--r--';
1301                 };
1302         } else {
1303                 return '----------';
1304         }
1305 }
1306
1307 # convert file mode in octal to file type string
1308 sub file_type {
1309         my $mode = shift;
1310
1311         if ($mode !~ m/^[0-7]+$/) {
1312                 return $mode;
1313         } else {
1314                 $mode = oct $mode;
1315         }
1316
1317         if (S_ISGITLINK($mode)) {
1318                 return "submodule";
1319         } elsif (S_ISDIR($mode & S_IFMT)) {
1320                 return "directory";
1321         } elsif (S_ISLNK($mode)) {
1322                 return "symlink";
1323         } elsif (S_ISREG($mode)) {
1324                 return "file";
1325         } else {
1326                 return "unknown";
1327         }
1328 }
1329
1330 # convert file mode in octal to file type description string
1331 sub file_type_long {
1332         my $mode = shift;
1333
1334         if ($mode !~ m/^[0-7]+$/) {
1335                 return $mode;
1336         } else {
1337                 $mode = oct $mode;
1338         }
1339
1340         if (S_ISGITLINK($mode)) {
1341                 return "submodule";
1342         } elsif (S_ISDIR($mode & S_IFMT)) {
1343                 return "directory";
1344         } elsif (S_ISLNK($mode)) {
1345                 return "symlink";
1346         } elsif (S_ISREG($mode)) {
1347                 if ($mode & S_IXUSR) {
1348                         return "executable";
1349                 } else {
1350                         return "file";
1351                 };
1352         } else {
1353                 return "unknown";
1354         }
1355 }
1356
1357
1358 ## ----------------------------------------------------------------------
1359 ## functions returning short HTML fragments, or transforming HTML fragments
1360 ## which don't belong to other sections
1361
1362 # format line of commit message.
1363 sub format_log_line_html {
1364         my $line = shift;
1365
1366         $line = esc_html($line, -nbsp=>1);
1367         if ($line =~ m/([0-9a-fA-F]{8,40})/) {
1368                 my $hash_text = $1;
1369                 my $link =
1370                         $cgi->a({-href => href(action=>"object", hash=>$hash_text),
1371                                 -class => "text"}, $hash_text);
1372                 $line =~ s/$hash_text/$link/;
1373         }
1374         return $line;
1375 }
1376
1377 # format marker of refs pointing to given object
1378
1379 # the destination action is chosen based on object type and current context:
1380 # - for annotated tags, we choose the tag view unless it's the current view
1381 #   already, in which case we go to shortlog view
1382 # - for other refs, we keep the current view if we're in history, shortlog or
1383 #   log view, and select shortlog otherwise
1384 sub format_ref_marker {
1385         my ($refs, $id) = @_;
1386         my $markers = '';
1387
1388         if (defined $refs->{$id}) {
1389                 foreach my $ref (@{$refs->{$id}}) {
1390                         # this code exploits the fact that non-lightweight tags are the
1391                         # only indirect objects, and that they are the only objects for which
1392                         # we want to use tag instead of shortlog as action
1393                         my ($type, $name) = qw();
1394                         my $indirect = ($ref =~ s/\^\{\}$//);
1395                         # e.g. tags/v2.6.11 or heads/next
1396                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1397                                 $type = $1;
1398                                 $name = $2;
1399                         } else {
1400                                 $type = "ref";
1401                                 $name = $ref;
1402                         }
1403
1404                         my $class = $type;
1405                         $class .= " indirect" if $indirect;
1406
1407                         my $dest_action = "shortlog";
1408
1409                         if ($indirect) {
1410                                 $dest_action = "tag" unless $action eq "tag";
1411                         } elsif ($action =~ /^(history|(short)?log)$/) {
1412                                 $dest_action = $action;
1413                         }
1414
1415                         my $dest = "";
1416                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1417                         $dest .= $ref;
1418
1419                         my $link = $cgi->a({
1420                                 -href => href(
1421                                         action=>$dest_action,
1422                                         hash=>$dest
1423                                 )}, $name);
1424
1425                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1426                                 $link . "</span>";
1427                 }
1428         }
1429
1430         if ($markers) {
1431                 return ' <span class="refs">'. $markers . '</span>';
1432         } else {
1433                 return "";
1434         }
1435 }
1436
1437 # format, perhaps shortened and with markers, title line
1438 sub format_subject_html {
1439         my ($long, $short, $href, $extra) = @_;
1440         $extra = '' unless defined($extra);
1441
1442         if (length($short) < length($long)) {
1443                 return $cgi->a({-href => $href, -class => "list subject",
1444                                 -title => to_utf8($long)},
1445                        esc_html($short) . $extra);
1446         } else {
1447                 return $cgi->a({-href => $href, -class => "list subject"},
1448                        esc_html($long)  . $extra);
1449         }
1450 }
1451
1452 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1453 sub format_git_diff_header_line {
1454         my $line = shift;
1455         my $diffinfo = shift;
1456         my ($from, $to) = @_;
1457
1458         if ($diffinfo->{'nparents'}) {
1459                 # combined diff
1460                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1461                 if ($to->{'href'}) {
1462                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1463                                          esc_path($to->{'file'}));
1464                 } else { # file was deleted (no href)
1465                         $line .= esc_path($to->{'file'});
1466                 }
1467         } else {
1468                 # "ordinary" diff
1469                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1470                 if ($from->{'href'}) {
1471                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1472                                          'a/' . esc_path($from->{'file'}));
1473                 } else { # file was added (no href)
1474                         $line .= 'a/' . esc_path($from->{'file'});
1475                 }
1476                 $line .= ' ';
1477                 if ($to->{'href'}) {
1478                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1479                                          'b/' . esc_path($to->{'file'}));
1480                 } else { # file was deleted
1481                         $line .= 'b/' . esc_path($to->{'file'});
1482                 }
1483         }
1484
1485         return "<div class=\"diff header\">$line</div>\n";
1486 }
1487
1488 # format extended diff header line, before patch itself
1489 sub format_extended_diff_header_line {
1490         my $line = shift;
1491         my $diffinfo = shift;
1492         my ($from, $to) = @_;
1493
1494         # match <path>
1495         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1496                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1497                                        esc_path($from->{'file'}));
1498         }
1499         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1500                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1501                                  esc_path($to->{'file'}));
1502         }
1503         # match single <mode>
1504         if ($line =~ m/\s(\d{6})$/) {
1505                 $line .= '<span class="info"> (' .
1506                          file_type_long($1) .
1507                          ')</span>';
1508         }
1509         # match <hash>
1510         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1511                 # can match only for combined diff
1512                 $line = 'index ';
1513                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1514                         if ($from->{'href'}[$i]) {
1515                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1516                                                   -class=>"hash"},
1517                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1518                         } else {
1519                                 $line .= '0' x 7;
1520                         }
1521                         # separator
1522                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1523                 }
1524                 $line .= '..';
1525                 if ($to->{'href'}) {
1526                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1527                                          substr($diffinfo->{'to_id'},0,7));
1528                 } else {
1529                         $line .= '0' x 7;
1530                 }
1531
1532         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1533                 # can match only for ordinary diff
1534                 my ($from_link, $to_link);
1535                 if ($from->{'href'}) {
1536                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1537                                              substr($diffinfo->{'from_id'},0,7));
1538                 } else {
1539                         $from_link = '0' x 7;
1540                 }
1541                 if ($to->{'href'}) {
1542                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1543                                            substr($diffinfo->{'to_id'},0,7));
1544                 } else {
1545                         $to_link = '0' x 7;
1546                 }
1547                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1548                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1549         }
1550
1551         return $line . "<br/>\n";
1552 }
1553
1554 # format from-file/to-file diff header
1555 sub format_diff_from_to_header {
1556         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1557         my $line;
1558         my $result = '';
1559
1560         $line = $from_line;
1561         #assert($line =~ m/^---/) if DEBUG;
1562         # no extra formatting for "^--- /dev/null"
1563         if (! $diffinfo->{'nparents'}) {
1564                 # ordinary (single parent) diff
1565                 if ($line =~ m!^--- "?a/!) {
1566                         if ($from->{'href'}) {
1567                                 $line = '--- a/' .
1568                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1569                                                 esc_path($from->{'file'}));
1570                         } else {
1571                                 $line = '--- a/' .
1572                                         esc_path($from->{'file'});
1573                         }
1574                 }
1575                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1576
1577         } else {
1578                 # combined diff (merge commit)
1579                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1580                         if ($from->{'href'}[$i]) {
1581                                 $line = '--- ' .
1582                                         $cgi->a({-href=>href(action=>"blobdiff",
1583                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1584                                                              hash_parent_base=>$parents[$i],
1585                                                              file_parent=>$from->{'file'}[$i],
1586                                                              hash=>$diffinfo->{'to_id'},
1587                                                              hash_base=>$hash,
1588                                                              file_name=>$to->{'file'}),
1589                                                  -class=>"path",
1590                                                  -title=>"diff" . ($i+1)},
1591                                                 $i+1) .
1592                                         '/' .
1593                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1594                                                 esc_path($from->{'file'}[$i]));
1595                         } else {
1596                                 $line = '--- /dev/null';
1597                         }
1598                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1599                 }
1600         }
1601
1602         $line = $to_line;
1603         #assert($line =~ m/^\+\+\+/) if DEBUG;
1604         # no extra formatting for "^+++ /dev/null"
1605         if ($line =~ m!^\+\+\+ "?b/!) {
1606                 if ($to->{'href'}) {
1607                         $line = '+++ b/' .
1608                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1609                                         esc_path($to->{'file'}));
1610                 } else {
1611                         $line = '+++ b/' .
1612                                 esc_path($to->{'file'});
1613                 }
1614         }
1615         $result .= qq!<div class="diff to_file">$line</div>\n!;
1616
1617         return $result;
1618 }
1619
1620 # create note for patch simplified by combined diff
1621 sub format_diff_cc_simplified {
1622         my ($diffinfo, @parents) = @_;
1623         my $result = '';
1624
1625         $result .= "<div class=\"diff header\">" .
1626                    "diff --cc ";
1627         if (!is_deleted($diffinfo)) {
1628                 $result .= $cgi->a({-href => href(action=>"blob",
1629                                                   hash_base=>$hash,
1630                                                   hash=>$diffinfo->{'to_id'},
1631                                                   file_name=>$diffinfo->{'to_file'}),
1632                                     -class => "path"},
1633                                    esc_path($diffinfo->{'to_file'}));
1634         } else {
1635                 $result .= esc_path($diffinfo->{'to_file'});
1636         }
1637         $result .= "</div>\n" . # class="diff header"
1638                    "<div class=\"diff nodifferences\">" .
1639                    "Simple merge" .
1640                    "</div>\n"; # class="diff nodifferences"
1641
1642         return $result;
1643 }
1644
1645 # format patch (diff) line (not to be used for diff headers)
1646 sub format_diff_line {
1647         my $line = shift;
1648         my ($from, $to) = @_;
1649         my $diff_class = "";
1650
1651         chomp $line;
1652
1653         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1654                 # combined diff
1655                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1656                 if ($line =~ m/^\@{3}/) {
1657                         $diff_class = " chunk_header";
1658                 } elsif ($line =~ m/^\\/) {
1659                         $diff_class = " incomplete";
1660                 } elsif ($prefix =~ tr/+/+/) {
1661                         $diff_class = " add";
1662                 } elsif ($prefix =~ tr/-/-/) {
1663                         $diff_class = " rem";
1664                 }
1665         } else {
1666                 # assume ordinary diff
1667                 my $char = substr($line, 0, 1);
1668                 if ($char eq '+') {
1669                         $diff_class = " add";
1670                 } elsif ($char eq '-') {
1671                         $diff_class = " rem";
1672                 } elsif ($char eq '@') {
1673                         $diff_class = " chunk_header";
1674                 } elsif ($char eq "\\") {
1675                         $diff_class = " incomplete";
1676                 }
1677         }
1678         $line = untabify($line);
1679         if ($from && $to && $line =~ m/^\@{2} /) {
1680                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1681                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1682
1683                 $from_lines = 0 unless defined $from_lines;
1684                 $to_lines   = 0 unless defined $to_lines;
1685
1686                 if ($from->{'href'}) {
1687                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1688                                              -class=>"list"}, $from_text);
1689                 }
1690                 if ($to->{'href'}) {
1691                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1692                                              -class=>"list"}, $to_text);
1693                 }
1694                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1695                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1696                 return "<div class=\"diff$diff_class\">$line</div>\n";
1697         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1698                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1699                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1700
1701                 @from_text = split(' ', $ranges);
1702                 for (my $i = 0; $i < @from_text; ++$i) {
1703                         ($from_start[$i], $from_nlines[$i]) =
1704                                 (split(',', substr($from_text[$i], 1)), 0);
1705                 }
1706
1707                 $to_text   = pop @from_text;
1708                 $to_start  = pop @from_start;
1709                 $to_nlines = pop @from_nlines;
1710
1711                 $line = "<span class=\"chunk_info\">$prefix ";
1712                 for (my $i = 0; $i < @from_text; ++$i) {
1713                         if ($from->{'href'}[$i]) {
1714                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1715                                                   -class=>"list"}, $from_text[$i]);
1716                         } else {
1717                                 $line .= $from_text[$i];
1718                         }
1719                         $line .= " ";
1720                 }
1721                 if ($to->{'href'}) {
1722                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1723                                           -class=>"list"}, $to_text);
1724                 } else {
1725                         $line .= $to_text;
1726                 }
1727                 $line .= " $prefix</span>" .
1728                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1729                 return "<div class=\"diff$diff_class\">$line</div>\n";
1730         }
1731         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1732 }
1733
1734 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1735 # linked.  Pass the hash of the tree/commit to snapshot.
1736 sub format_snapshot_links {
1737         my ($hash) = @_;
1738         my $num_fmts = @snapshot_fmts;
1739         if ($num_fmts > 1) {
1740                 # A parenthesized list of links bearing format names.
1741                 # e.g. "snapshot (_tar.gz_ _zip_)"
1742                 return "snapshot (" . join(' ', map
1743                         $cgi->a({
1744                                 -href => href(
1745                                         action=>"snapshot",
1746                                         hash=>$hash,
1747                                         snapshot_format=>$_
1748                                 )
1749                         }, $known_snapshot_formats{$_}{'display'})
1750                 , @snapshot_fmts) . ")";
1751         } elsif ($num_fmts == 1) {
1752                 # A single "snapshot" link whose tooltip bears the format name.
1753                 # i.e. "_snapshot_"
1754                 my ($fmt) = @snapshot_fmts;
1755                 return
1756                         $cgi->a({
1757                                 -href => href(
1758                                         action=>"snapshot",
1759                                         hash=>$hash,
1760                                         snapshot_format=>$fmt
1761                                 ),
1762                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1763                         }, "snapshot");
1764         } else { # $num_fmts == 0
1765                 return undef;
1766         }
1767 }
1768
1769 ## ......................................................................
1770 ## functions returning values to be passed, perhaps after some
1771 ## transformation, to other functions; e.g. returning arguments to href()
1772
1773 # returns hash to be passed to href to generate gitweb URL
1774 # in -title key it returns description of link
1775 sub get_feed_info {
1776         my $format = shift || 'Atom';
1777         my %res = (action => lc($format));
1778
1779         # feed links are possible only for project views
1780         return unless (defined $project);
1781         # some views should link to OPML, or to generic project feed,
1782         # or don't have specific feed yet (so they should use generic)
1783         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1784
1785         my $branch;
1786         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1787         # from tag links; this also makes possible to detect branch links
1788         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1789             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1790                 $branch = $1;
1791         }
1792         # find log type for feed description (title)
1793         my $type = 'log';
1794         if (defined $file_name) {
1795                 $type  = "history of $file_name";
1796                 $type .= "/" if ($action eq 'tree');
1797                 $type .= " on '$branch'" if (defined $branch);
1798         } else {
1799                 $type = "log of $branch" if (defined $branch);
1800         }
1801
1802         $res{-title} = $type;
1803         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1804         $res{'file_name'} = $file_name;
1805
1806         return %res;
1807 }
1808
1809 ## ----------------------------------------------------------------------
1810 ## git utility subroutines, invoking git commands
1811
1812 # returns path to the core git executable and the --git-dir parameter as list
1813 sub git_cmd {
1814         return $GIT, '--git-dir='.$git_dir;
1815 }
1816
1817 # quote the given arguments for passing them to the shell
1818 # quote_command("command", "arg 1", "arg with ' and ! characters")
1819 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1820 # Try to avoid using this function wherever possible.
1821 sub quote_command {
1822         return join(' ',
1823                     map( { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ ));
1824 }
1825
1826 # get HEAD ref of given project as hash
1827 sub git_get_head_hash {
1828         my $project = shift;
1829         my $o_git_dir = $git_dir;
1830         my $retval = undef;
1831         $git_dir = "$projectroot/$project";
1832         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1833                 my $head = <$fd>;
1834                 close $fd;
1835                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1836                         $retval = $1;
1837                 }
1838         }
1839         if (defined $o_git_dir) {
1840                 $git_dir = $o_git_dir;
1841         }
1842         return $retval;
1843 }
1844
1845 # get type of given object
1846 sub git_get_type {
1847         my $hash = shift;
1848
1849         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1850         my $type = <$fd>;
1851         close $fd or return;
1852         chomp $type;
1853         return $type;
1854 }
1855
1856 # repository configuration
1857 our $config_file = '';
1858 our %config;
1859
1860 # store multiple values for single key as anonymous array reference
1861 # single values stored directly in the hash, not as [ <value> ]
1862 sub hash_set_multi {
1863         my ($hash, $key, $value) = @_;
1864
1865         if (!exists $hash->{$key}) {
1866                 $hash->{$key} = $value;
1867         } elsif (!ref $hash->{$key}) {
1868                 $hash->{$key} = [ $hash->{$key}, $value ];
1869         } else {
1870                 push @{$hash->{$key}}, $value;
1871         }
1872 }
1873
1874 # return hash of git project configuration
1875 # optionally limited to some section, e.g. 'gitweb'
1876 sub git_parse_project_config {
1877         my $section_regexp = shift;
1878         my %config;
1879
1880         local $/ = "\0";
1881
1882         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1883                 or return;
1884
1885         while (my $keyval = <$fh>) {
1886                 chomp $keyval;
1887                 my ($key, $value) = split(/\n/, $keyval, 2);
1888
1889                 hash_set_multi(\%config, $key, $value)
1890                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1891         }
1892         close $fh;
1893
1894         return %config;
1895 }
1896
1897 # convert config value to boolean, 'true' or 'false'
1898 # no value, number > 0, 'true' and 'yes' values are true
1899 # rest of values are treated as false (never as error)
1900 sub config_to_bool {
1901         my $val = shift;
1902
1903         # strip leading and trailing whitespace
1904         $val =~ s/^\s+//;
1905         $val =~ s/\s+$//;
1906
1907         return (!defined $val ||               # section.key
1908                 ($val =~ /^\d+$/ && $val) ||   # section.key = 1
1909                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1910 }
1911
1912 # convert config value to simple decimal number
1913 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1914 # to be multiplied by 1024, 1048576, or 1073741824
1915 sub config_to_int {
1916         my $val = shift;
1917
1918         # strip leading and trailing whitespace
1919         $val =~ s/^\s+//;
1920         $val =~ s/\s+$//;
1921
1922         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1923                 $unit = lc($unit);
1924                 # unknown unit is treated as 1
1925                 return $num * ($unit eq 'g' ? 1073741824 :
1926                                $unit eq 'm' ?    1048576 :
1927                                $unit eq 'k' ?       1024 : 1);
1928         }
1929         return $val;
1930 }
1931
1932 # convert config value to array reference, if needed
1933 sub config_to_multi {
1934         my $val = shift;
1935
1936         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1937 }
1938
1939 sub git_get_project_config {
1940         my ($key, $type) = @_;
1941
1942         # key sanity check
1943         return unless ($key);
1944         $key =~ s/^gitweb\.//;
1945         return if ($key =~ m/\W/);
1946
1947         # type sanity check
1948         if (defined $type) {
1949                 $type =~ s/^--//;
1950                 $type = undef
1951                         unless ($type eq 'bool' || $type eq 'int');
1952         }
1953
1954         # get config
1955         if (!defined $config_file ||
1956             $config_file ne "$git_dir/config") {
1957                 %config = git_parse_project_config('gitweb');
1958                 $config_file = "$git_dir/config";
1959         }
1960
1961         # ensure given type
1962         if (!defined $type) {
1963                 return $config{"gitweb.$key"};
1964         } elsif ($type eq 'bool') {
1965                 # backward compatibility: 'git config --bool' returns true/false
1966                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1967         } elsif ($type eq 'int') {
1968                 return config_to_int($config{"gitweb.$key"});
1969         }
1970         return $config{"gitweb.$key"};
1971 }
1972
1973 # get hash of given path at given ref
1974 sub git_get_hash_by_path {
1975         my $base = shift;
1976         my $path = shift || return undef;
1977         my $type = shift;
1978
1979         $path =~ s,/+$,,;
1980
1981         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
1982                 or die_error(500, "Open git-ls-tree failed");
1983         my $line = <$fd>;
1984         close $fd or return undef;
1985
1986         if (!defined $line) {
1987                 # there is no tree or hash given by $path at $base
1988                 return undef;
1989         }
1990
1991         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
1992         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
1993         if (defined $type && $type ne $2) {
1994                 # type doesn't match
1995                 return undef;
1996         }
1997         return $3;
1998 }
1999
2000 # get path of entry with given hash at given tree-ish (ref)
2001 # used to get 'from' filename for combined diff (merge commit) for renames
2002 sub git_get_path_by_hash {
2003         my $base = shift || return;
2004         my $hash = shift || return;
2005
2006         local $/ = "\0";
2007
2008         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2009                 or return undef;
2010         while (my $line = <$fd>) {
2011                 chomp $line;
2012
2013                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2014                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2015                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2016                         close $fd;
2017                         return $1;
2018                 }
2019         }
2020         close $fd;
2021         return undef;
2022 }
2023
2024 ## ......................................................................
2025 ## git utility functions, directly accessing git repository
2026
2027 sub git_get_project_description {
2028         my $path = shift;
2029
2030         $git_dir = "$projectroot/$path";
2031         open my $fd, "$git_dir/description"
2032                 or return git_get_project_config('description');
2033         my $descr = <$fd>;
2034         close $fd;
2035         if (defined $descr) {
2036                 chomp $descr;
2037         }
2038         return $descr;
2039 }
2040
2041 sub git_get_project_ctags {
2042         my $path = shift;
2043         my $ctags = {};
2044
2045         $git_dir = "$projectroot/$path";
2046         unless (opendir D, "$git_dir/ctags") {
2047                 return $ctags;
2048         }
2049         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir(D)) {
2050                 open CT, $_ or next;
2051                 my $val = <CT>;
2052                 chomp $val;
2053                 close CT;
2054                 my $ctag = $_; $ctag =~ s#.*/##;
2055                 $ctags->{$ctag} = $val;
2056         }
2057         closedir D;
2058         $ctags;
2059 }
2060
2061 sub git_populate_project_tagcloud {
2062         my $ctags = shift;
2063
2064         # First, merge different-cased tags; tags vote on casing
2065         my %ctags_lc;
2066         foreach (keys %$ctags) {
2067                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2068                 if (not $ctags_lc{lc $_}->{topcount}
2069                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2070                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2071                         $ctags_lc{lc $_}->{topname} = $_;
2072                 }
2073         }
2074
2075         my $cloud;
2076         if (eval { require HTML::TagCloud; 1; }) {
2077                 $cloud = HTML::TagCloud->new;
2078                 foreach (sort keys %ctags_lc) {
2079                         # Pad the title with spaces so that the cloud looks
2080                         # less crammed.
2081                         my $title = $ctags_lc{$_}->{topname};
2082                         $title =~ s/ /&nbsp;/g;
2083                         $title =~ s/^/&nbsp;/g;
2084                         $title =~ s/$/&nbsp;/g;
2085                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2086                 }
2087         } else {
2088                 $cloud = \%ctags_lc;
2089         }
2090         $cloud;
2091 }
2092
2093 sub git_show_project_tagcloud {
2094         my ($cloud, $count) = @_;
2095         print STDERR ref($cloud)."..\n";
2096         if (ref $cloud eq 'HTML::TagCloud') {
2097                 return $cloud->html_and_css($count);
2098         } else {
2099                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2100                 return '<p align="center">' . join (', ', map {
2101                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2102                 } splice(@tags, 0, $count)) . '</p>';
2103         }
2104 }
2105
2106 sub git_get_project_url_list {
2107         my $path = shift;
2108
2109         $git_dir = "$projectroot/$path";
2110         open my $fd, "$git_dir/cloneurl"
2111                 or return wantarray ?
2112                 @{ config_to_multi(git_get_project_config('url')) } :
2113                    config_to_multi(git_get_project_config('url'));
2114         my @git_project_url_list = map { chomp; $_ } <$fd>;
2115         close $fd;
2116
2117         return wantarray ? @git_project_url_list : \@git_project_url_list;
2118 }
2119
2120 sub git_get_projects_list {
2121         my ($filter) = @_;
2122         my @list;
2123
2124         $filter ||= '';
2125         $filter =~ s/\.git$//;
2126
2127         my $check_forks = gitweb_check_feature('forks');
2128
2129         if (-d $projects_list) {
2130                 # search in directory
2131                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2132                 # remove the trailing "/"
2133                 $dir =~ s!/+$!!;
2134                 my $pfxlen = length("$dir");
2135                 my $pfxdepth = ($dir =~ tr!/!!);
2136
2137                 File::Find::find({
2138                         follow_fast => 1, # follow symbolic links
2139                         follow_skip => 2, # ignore duplicates
2140                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2141                         wanted => sub {
2142                                 # skip project-list toplevel, if we get it.
2143                                 return if (m!^[/.]$!);
2144                                 # only directories can be git repositories
2145                                 return unless (-d $_);
2146                                 # don't traverse too deep (Find is super slow on os x)
2147                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2148                                         $File::Find::prune = 1;
2149                                         return;
2150                                 }
2151
2152                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2153                                 # we check related file in $projectroot
2154                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2155                                 if (check_export_ok("$projectroot/$path")) {
2156                                         push @list, { path => $path };
2157                                         $File::Find::prune = 1;
2158                                 }
2159                         },
2160                 }, "$dir");
2161
2162         } elsif (-f $projects_list) {
2163                 # read from file(url-encoded):
2164                 # 'git%2Fgit.git Linus+Torvalds'
2165                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2166                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2167                 my %paths;
2168                 open my ($fd), $projects_list or return;
2169         PROJECT:
2170                 while (my $line = <$fd>) {
2171                         chomp $line;
2172                         my ($path, $owner) = split ' ', $line;
2173                         $path = unescape($path);
2174                         $owner = unescape($owner);
2175                         if (!defined $path) {
2176                                 next;
2177                         }
2178                         if ($filter ne '') {
2179                                 # looking for forks;
2180                                 my $pfx = substr($path, 0, length($filter));
2181                                 if ($pfx ne $filter) {
2182                                         next PROJECT;
2183                                 }
2184                                 my $sfx = substr($path, length($filter));
2185                                 if ($sfx !~ /^\/.*\.git$/) {
2186                                         next PROJECT;
2187                                 }
2188                         } elsif ($check_forks) {
2189                         PATH:
2190                                 foreach my $filter (keys %paths) {
2191                                         # looking for forks;
2192                                         my $pfx = substr($path, 0, length($filter));
2193                                         if ($pfx ne $filter) {
2194                                                 next PATH;
2195                                         }
2196                                         my $sfx = substr($path, length($filter));
2197                                         if ($sfx !~ /^\/.*\.git$/) {
2198                                                 next PATH;
2199                                         }
2200                                         # is a fork, don't include it in
2201                                         # the list
2202                                         next PROJECT;
2203                                 }
2204                         }
2205                         if (check_export_ok("$projectroot/$path")) {
2206                                 my $pr = {
2207                                         path => $path,
2208                                         owner => to_utf8($owner),
2209                                 };
2210                                 push @list, $pr;
2211                                 (my $forks_path = $path) =~ s/\.git$//;
2212                                 $paths{$forks_path}++;
2213                         }
2214                 }
2215                 close $fd;
2216         }
2217         return @list;
2218 }
2219
2220 our $gitweb_project_owner = undef;
2221 sub git_get_project_list_from_file {
2222
2223         return if (defined $gitweb_project_owner);
2224
2225         $gitweb_project_owner = {};
2226         # read from file (url-encoded):
2227         # 'git%2Fgit.git Linus+Torvalds'
2228         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2229         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2230         if (-f $projects_list) {
2231                 open (my $fd , $projects_list);
2232                 while (my $line = <$fd>) {
2233                         chomp $line;
2234                         my ($pr, $ow) = split ' ', $line;
2235                         $pr = unescape($pr);
2236                         $ow = unescape($ow);
2237                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2238                 }
2239                 close $fd;
2240         }
2241 }
2242
2243 sub git_get_project_owner {
2244         my $project = shift;
2245         my $owner;
2246
2247         return undef unless $project;
2248         $git_dir = "$projectroot/$project";
2249
2250         if (!defined $gitweb_project_owner) {
2251                 git_get_project_list_from_file();
2252         }
2253
2254         if (exists $gitweb_project_owner->{$project}) {
2255                 $owner = $gitweb_project_owner->{$project};
2256         }
2257         if (!defined $owner){
2258                 $owner = git_get_project_config('owner');
2259         }
2260         if (!defined $owner) {
2261                 $owner = get_file_owner("$git_dir");
2262         }
2263
2264         return $owner;
2265 }
2266
2267 sub git_get_last_activity {
2268         my ($path) = @_;
2269         my $fd;
2270
2271         $git_dir = "$projectroot/$path";
2272         open($fd, "-|", git_cmd(), 'for-each-ref',
2273              '--format=%(committer)',
2274              '--sort=-committerdate',
2275              '--count=1',
2276              'refs/heads') or return;
2277         my $most_recent = <$fd>;
2278         close $fd or return;
2279         if (defined $most_recent &&
2280             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2281                 my $timestamp = $1;
2282                 my $age = time - $timestamp;
2283                 return ($age, age_string($age));
2284         }
2285         return (undef, undef);
2286 }
2287
2288 sub git_get_references {
2289         my $type = shift || "";
2290         my %refs;
2291         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2292         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2293         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2294                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2295                 or return;
2296
2297         while (my $line = <$fd>) {
2298                 chomp $line;
2299                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2300                         if (defined $refs{$1}) {
2301                                 push @{$refs{$1}}, $2;
2302                         } else {
2303                                 $refs{$1} = [ $2 ];
2304                         }
2305                 }
2306         }
2307         close $fd or return;
2308         return \%refs;
2309 }
2310
2311 sub git_get_rev_name_tags {
2312         my $hash = shift || return undef;
2313
2314         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2315                 or return;
2316         my $name_rev = <$fd>;
2317         close $fd;
2318
2319         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2320                 return $1;
2321         } else {
2322                 # catches also '$hash undefined' output
2323                 return undef;
2324         }
2325 }
2326
2327 ## ----------------------------------------------------------------------
2328 ## parse to hash functions
2329
2330 sub parse_date {
2331         my $epoch = shift;
2332         my $tz = shift || "-0000";
2333
2334         my %date;
2335         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2336         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2337         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2338         $date{'hour'} = $hour;
2339         $date{'minute'} = $min;
2340         $date{'mday'} = $mday;
2341         $date{'day'} = $days[$wday];
2342         $date{'month'} = $months[$mon];
2343         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2344                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2345         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2346                              $mday, $months[$mon], $hour ,$min;
2347         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2348                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2349
2350         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2351         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2352         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2353         $date{'hour_local'} = $hour;
2354         $date{'minute_local'} = $min;
2355         $date{'tz_local'} = $tz;
2356         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2357                                   1900+$year, $mon+1, $mday,
2358                                   $hour, $min, $sec, $tz);
2359         return %date;
2360 }
2361
2362 sub parse_tag {
2363         my $tag_id = shift;
2364         my %tag;
2365         my @comment;
2366
2367         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2368         $tag{'id'} = $tag_id;
2369         while (my $line = <$fd>) {
2370                 chomp $line;
2371                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2372                         $tag{'object'} = $1;
2373                 } elsif ($line =~ m/^type (.+)$/) {
2374                         $tag{'type'} = $1;
2375                 } elsif ($line =~ m/^tag (.+)$/) {
2376                         $tag{'name'} = $1;
2377                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2378                         $tag{'author'} = $1;
2379                         $tag{'epoch'} = $2;
2380                         $tag{'tz'} = $3;
2381                 } elsif ($line =~ m/--BEGIN/) {
2382                         push @comment, $line;
2383                         last;
2384                 } elsif ($line eq "") {
2385                         last;
2386                 }
2387         }
2388         push @comment, <$fd>;
2389         $tag{'comment'} = \@comment;
2390         close $fd or return;
2391         if (!defined $tag{'name'}) {
2392                 return
2393         };
2394         return %tag
2395 }
2396
2397 sub parse_commit_text {
2398         my ($commit_text, $withparents) = @_;
2399         my @commit_lines = split '\n', $commit_text;
2400         my %co;
2401
2402         pop @commit_lines; # Remove '\0'
2403
2404         if (! @commit_lines) {
2405                 return;
2406         }
2407
2408         my $header = shift @commit_lines;
2409         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2410                 return;
2411         }
2412         ($co{'id'}, my @parents) = split ' ', $header;
2413         while (my $line = shift @commit_lines) {
2414                 last if $line eq "\n";
2415                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2416                         $co{'tree'} = $1;
2417                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2418                         push @parents, $1;
2419                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2420                         $co{'author'} = $1;
2421                         $co{'author_epoch'} = $2;
2422                         $co{'author_tz'} = $3;
2423                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2424                                 $co{'author_name'}  = $1;
2425                                 $co{'author_email'} = $2;
2426                         } else {
2427                                 $co{'author_name'} = $co{'author'};
2428                         }
2429                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2430                         $co{'committer'} = $1;
2431                         $co{'committer_epoch'} = $2;
2432                         $co{'committer_tz'} = $3;
2433                         $co{'committer_name'} = $co{'committer'};
2434                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2435                                 $co{'committer_name'}  = $1;
2436                                 $co{'committer_email'} = $2;
2437                         } else {
2438                                 $co{'committer_name'} = $co{'committer'};
2439                         }
2440                 }
2441         }
2442         if (!defined $co{'tree'}) {
2443                 return;
2444         };
2445         $co{'parents'} = \@parents;
2446         $co{'parent'} = $parents[0];
2447
2448         foreach my $title (@commit_lines) {
2449                 $title =~ s/^    //;
2450                 if ($title ne "") {
2451                         $co{'title'} = chop_str($title, 80, 5);
2452                         # remove leading stuff of merges to make the interesting part visible
2453                         if (length($title) > 50) {
2454                                 $title =~ s/^Automatic //;
2455                                 $title =~ s/^merge (of|with) /Merge ... /i;
2456                                 if (length($title) > 50) {
2457                                         $title =~ s/(http|rsync):\/\///;
2458                                 }
2459                                 if (length($title) > 50) {
2460                                         $title =~ s/(master|www|rsync)\.//;
2461                                 }
2462                                 if (length($title) > 50) {
2463                                         $title =~ s/kernel.org:?//;
2464                                 }
2465                                 if (length($title) > 50) {
2466                                         $title =~ s/\/pub\/scm//;
2467                                 }
2468                         }
2469                         $co{'title_short'} = chop_str($title, 50, 5);
2470                         last;
2471                 }
2472         }
2473         if (! defined $co{'title'} || $co{'title'} eq "") {
2474                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2475         }
2476         # remove added spaces
2477         foreach my $line (@commit_lines) {
2478                 $line =~ s/^    //;
2479         }
2480         $co{'comment'} = \@commit_lines;
2481
2482         my $age = time - $co{'committer_epoch'};
2483         $co{'age'} = $age;
2484         $co{'age_string'} = age_string($age);
2485         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2486         if ($age > 60*60*24*7*2) {
2487                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2488                 $co{'age_string_age'} = $co{'age_string'};
2489         } else {
2490                 $co{'age_string_date'} = $co{'age_string'};
2491                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2492         }
2493         return %co;
2494 }
2495
2496 sub parse_commit {
2497         my ($commit_id) = @_;
2498         my %co;
2499
2500         local $/ = "\0";
2501
2502         open my $fd, "-|", git_cmd(), "rev-list",
2503                 "--parents",
2504                 "--header",
2505                 "--max-count=1",
2506                 $commit_id,
2507                 "--",
2508                 or die_error(500, "Open git-rev-list failed");
2509         %co = parse_commit_text(<$fd>, 1);
2510         close $fd;
2511
2512         return %co;
2513 }
2514
2515 sub parse_commits {
2516         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2517         my @cos;
2518
2519         $maxcount ||= 1;
2520         $skip ||= 0;
2521
2522         local $/ = "\0";
2523
2524         open my $fd, "-|", git_cmd(), "rev-list",
2525                 "--header",
2526                 @args,
2527                 ("--max-count=" . $maxcount),
2528                 ("--skip=" . $skip),
2529                 @extra_options,
2530                 $commit_id,
2531                 "--",
2532                 ($filename ? ($filename) : ())
2533                 or die_error(500, "Open git-rev-list failed");
2534         while (my $line = <$fd>) {
2535                 my %co = parse_commit_text($line);
2536                 push @cos, \%co;
2537         }
2538         close $fd;
2539
2540         return wantarray ? @cos : \@cos;
2541 }
2542
2543 # parse line of git-diff-tree "raw" output
2544 sub parse_difftree_raw_line {
2545         my $line = shift;
2546         my %res;
2547
2548         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2549         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2550         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2551                 $res{'from_mode'} = $1;
2552                 $res{'to_mode'} = $2;
2553                 $res{'from_id'} = $3;
2554                 $res{'to_id'} = $4;
2555                 $res{'status'} = $5;
2556                 $res{'similarity'} = $6;
2557                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2558                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2559                 } else {
2560                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2561                 }
2562         }
2563         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2564         # combined diff (for merge commit)
2565         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2566                 $res{'nparents'}  = length($1);
2567                 $res{'from_mode'} = [ split(' ', $2) ];
2568                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2569                 $res{'from_id'} = [ split(' ', $3) ];
2570                 $res{'to_id'} = pop @{$res{'from_id'}};
2571                 $res{'status'} = [ split('', $4) ];
2572                 $res{'to_file'} = unquote($5);
2573         }
2574         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2575         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2576                 $res{'commit'} = $1;
2577         }
2578
2579         return wantarray ? %res : \%res;
2580 }
2581
2582 # wrapper: return parsed line of git-diff-tree "raw" output
2583 # (the argument might be raw line, or parsed info)
2584 sub parsed_difftree_line {
2585         my $line_or_ref = shift;
2586
2587         if (ref($line_or_ref) eq "HASH") {
2588                 # pre-parsed (or generated by hand)
2589                 return $line_or_ref;
2590         } else {
2591                 return parse_difftree_raw_line($line_or_ref);
2592         }
2593 }
2594
2595 # parse line of git-ls-tree output
2596 sub parse_ls_tree_line ($;%) {
2597         my $line = shift;
2598         my %opts = @_;
2599         my %res;
2600
2601         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2602         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2603
2604         $res{'mode'} = $1;
2605         $res{'type'} = $2;
2606         $res{'hash'} = $3;
2607         if ($opts{'-z'}) {
2608                 $res{'name'} = $4;
2609         } else {
2610                 $res{'name'} = unquote($4);
2611         }
2612
2613         return wantarray ? %res : \%res;
2614 }
2615
2616 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2617 sub parse_from_to_diffinfo {
2618         my ($diffinfo, $from, $to, @parents) = @_;
2619
2620         if ($diffinfo->{'nparents'}) {
2621                 # combined diff
2622                 $from->{'file'} = [];
2623                 $from->{'href'} = [];
2624                 fill_from_file_info($diffinfo, @parents)
2625                         unless exists $diffinfo->{'from_file'};
2626                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2627                         $from->{'file'}[$i] =
2628                                 defined $diffinfo->{'from_file'}[$i] ?
2629                                         $diffinfo->{'from_file'}[$i] :
2630                                         $diffinfo->{'to_file'};
2631                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2632                                 $from->{'href'}[$i] = href(action=>"blob",
2633                                                            hash_base=>$parents[$i],
2634                                                            hash=>$diffinfo->{'from_id'}[$i],
2635                                                            file_name=>$from->{'file'}[$i]);
2636                         } else {
2637                                 $from->{'href'}[$i] = undef;
2638                         }
2639                 }
2640         } else {
2641                 # ordinary (not combined) diff
2642                 $from->{'file'} = $diffinfo->{'from_file'};
2643                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2644                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2645                                                hash=>$diffinfo->{'from_id'},
2646                                                file_name=>$from->{'file'});
2647                 } else {
2648                         delete $from->{'href'};
2649                 }
2650         }
2651
2652         $to->{'file'} = $diffinfo->{'to_file'};
2653         if (!is_deleted($diffinfo)) { # file exists in result
2654                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2655                                      hash=>$diffinfo->{'to_id'},
2656                                      file_name=>$to->{'file'});
2657         } else {
2658                 delete $to->{'href'};
2659         }
2660 }
2661
2662 ## ......................................................................
2663 ## parse to array of hashes functions
2664
2665 sub git_get_heads_list {
2666         my $limit = shift;
2667         my @headslist;
2668
2669         open my $fd, '-|', git_cmd(), 'for-each-ref',
2670                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2671                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2672                 'refs/heads'
2673                 or return;
2674         while (my $line = <$fd>) {
2675                 my %ref_item;
2676
2677                 chomp $line;
2678                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2679                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2680                 my ($committer, $epoch, $tz) =
2681                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2682                 $ref_item{'fullname'}  = $name;
2683                 $name =~ s!^refs/heads/!!;
2684
2685                 $ref_item{'name'}  = $name;
2686                 $ref_item{'id'}    = $hash;
2687                 $ref_item{'title'} = $title || '(no commit message)';
2688                 $ref_item{'epoch'} = $epoch;
2689                 if ($epoch) {
2690                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2691                 } else {
2692                         $ref_item{'age'} = "unknown";
2693                 }
2694
2695                 push @headslist, \%ref_item;
2696         }
2697         close $fd;
2698
2699         return wantarray ? @headslist : \@headslist;
2700 }
2701
2702 sub git_get_tags_list {
2703         my $limit = shift;
2704         my @tagslist;
2705
2706         open my $fd, '-|', git_cmd(), 'for-each-ref',
2707                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2708                 '--format=%(objectname) %(objecttype) %(refname) '.
2709                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2710                 'refs/tags'
2711                 or return;
2712         while (my $line = <$fd>) {
2713                 my %ref_item;
2714
2715                 chomp $line;
2716                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2717                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2718                 my ($creator, $epoch, $tz) =
2719                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2720                 $ref_item{'fullname'} = $name;
2721                 $name =~ s!^refs/tags/!!;
2722
2723                 $ref_item{'type'} = $type;
2724                 $ref_item{'id'} = $id;
2725                 $ref_item{'name'} = $name;
2726                 if ($type eq "tag") {
2727                         $ref_item{'subject'} = $title;
2728                         $ref_item{'reftype'} = $reftype;
2729                         $ref_item{'refid'}   = $refid;
2730                 } else {
2731                         $ref_item{'reftype'} = $type;
2732                         $ref_item{'refid'}   = $id;
2733                 }
2734
2735                 if ($type eq "tag" || $type eq "commit") {
2736                         $ref_item{'epoch'} = $epoch;
2737                         if ($epoch) {
2738                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2739                         } else {
2740                                 $ref_item{'age'} = "unknown";
2741                         }
2742                 }
2743
2744                 push @tagslist, \%ref_item;
2745         }
2746         close $fd;
2747
2748         return wantarray ? @tagslist : \@tagslist;
2749 }
2750
2751 ## ----------------------------------------------------------------------
2752 ## filesystem-related functions
2753
2754 sub get_file_owner {
2755         my $path = shift;
2756
2757         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2758         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2759         if (!defined $gcos) {
2760                 return undef;
2761         }
2762         my $owner = $gcos;
2763         $owner =~ s/[,;].*$//;
2764         return to_utf8($owner);
2765 }
2766
2767 # assume that file exists
2768 sub insert_file {
2769         my $filename = shift;
2770
2771         open my $fd, '<', $filename;
2772         print map { to_utf8($_) } <$fd>;
2773         close $fd;
2774 }
2775
2776 ## ......................................................................
2777 ## mimetype related functions
2778
2779 sub mimetype_guess_file {
2780         my $filename = shift;
2781         my $mimemap = shift;
2782         -r $mimemap or return undef;
2783
2784         my %mimemap;
2785         open(MIME, $mimemap) or return undef;
2786         while (<MIME>) {
2787                 next if m/^#/; # skip comments
2788                 my ($mime, $exts) = split(/\t+/);
2789                 if (defined $exts) {
2790                         my @exts = split(/\s+/, $exts);
2791                         foreach my $ext (@exts) {
2792                                 $mimemap{$ext} = $mime;
2793                         }
2794                 }
2795         }
2796         close(MIME);
2797
2798         $filename =~ /\.([^.]*)$/;
2799         return $mimemap{$1};
2800 }
2801
2802 sub mimetype_guess {
2803         my $filename = shift;
2804         my $mime;
2805         $filename =~ /\./ or return undef;
2806
2807         if ($mimetypes_file) {
2808                 my $file = $mimetypes_file;
2809                 if ($file !~ m!^/!) { # if it is relative path
2810                         # it is relative to project
2811                         $file = "$projectroot/$project/$file";
2812                 }
2813                 $mime = mimetype_guess_file($filename, $file);
2814         }
2815         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2816         return $mime;
2817 }
2818
2819 sub blob_mimetype {
2820         my $fd = shift;
2821         my $filename = shift;
2822
2823         if ($filename) {
2824                 my $mime = mimetype_guess($filename);
2825                 $mime and return $mime;
2826         }
2827
2828         # just in case
2829         return $default_blob_plain_mimetype unless $fd;
2830
2831         if (-T $fd) {
2832                 return 'text/plain';
2833         } elsif (! $filename) {
2834                 return 'application/octet-stream';
2835         } elsif ($filename =~ m/\.png$/i) {
2836                 return 'image/png';
2837         } elsif ($filename =~ m/\.gif$/i) {
2838                 return 'image/gif';
2839         } elsif ($filename =~ m/\.jpe?g$/i) {
2840                 return 'image/jpeg';
2841         } else {
2842                 return 'application/octet-stream';
2843         }
2844 }
2845
2846 sub blob_contenttype {
2847         my ($fd, $file_name, $type) = @_;
2848
2849         $type ||= blob_mimetype($fd, $file_name);
2850         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
2851                 $type .= "; charset=$default_text_plain_charset";
2852         }
2853
2854         return $type;
2855 }
2856
2857 ## ======================================================================
2858 ## functions printing HTML: header, footer, error page
2859
2860 sub git_header_html {
2861         my $status = shift || "200 OK";
2862         my $expires = shift;
2863
2864         my $title = "$site_name";
2865         if (defined $project) {
2866                 $title .= " - " . to_utf8($project);
2867                 if (defined $action) {
2868                         $title .= "/$action";
2869                         if (defined $file_name) {
2870                                 $title .= " - " . esc_path($file_name);
2871                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2872                                         $title .= "/";
2873                                 }
2874                         }
2875                 }
2876         }
2877         my $content_type;
2878         # require explicit support from the UA if we are to send the page as
2879         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2880         # we have to do this because MSIE sometimes globs '*/*', pretending to
2881         # support xhtml+xml but choking when it gets what it asked for.
2882         if (defined $cgi->http('HTTP_ACCEPT') &&
2883             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2884             $cgi->Accept('application/xhtml+xml') != 0) {
2885                 $content_type = 'application/xhtml+xml';
2886         } else {
2887                 $content_type = 'text/html';
2888         }
2889         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2890                            -status=> $status, -expires => $expires);
2891         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2892         print <<EOF;
2893 <?xml version="1.0" encoding="utf-8"?>
2894 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2895 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2896 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2897 <!-- git core binaries version $git_version -->
2898 <head>
2899 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2900 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2901 <meta name="robots" content="index, nofollow"/>
2902 <title>$title</title>
2903 EOF
2904 # print out each stylesheet that exist
2905         if (defined $stylesheet) {
2906 #provides backwards capability for those people who define style sheet in a config file
2907                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2908         } else {
2909                 foreach my $stylesheet (@stylesheets) {
2910                         next unless $stylesheet;
2911                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2912                 }
2913         }
2914         if (defined $project) {
2915                 my %href_params = get_feed_info();
2916                 if (!exists $href_params{'-title'}) {
2917                         $href_params{'-title'} = 'log';
2918                 }
2919
2920                 foreach my $format qw(RSS Atom) {
2921                         my $type = lc($format);
2922                         my %link_attr = (
2923                                 '-rel' => 'alternate',
2924                                 '-title' => "$project - $href_params{'-title'} - $format feed",
2925                                 '-type' => "application/$type+xml"
2926                         );
2927
2928                         $href_params{'action'} = $type;
2929                         $link_attr{'-href'} = href(%href_params);
2930                         print "<link ".
2931                               "rel=\"$link_attr{'-rel'}\" ".
2932                               "title=\"$link_attr{'-title'}\" ".
2933                               "href=\"$link_attr{'-href'}\" ".
2934                               "type=\"$link_attr{'-type'}\" ".
2935                               "/>\n";
2936
2937                         $href_params{'extra_options'} = '--no-merges';
2938                         $link_attr{'-href'} = href(%href_params);
2939                         $link_attr{'-title'} .= ' (no merges)';
2940                         print "<link ".
2941                               "rel=\"$link_attr{'-rel'}\" ".
2942                               "title=\"$link_attr{'-title'}\" ".
2943                               "href=\"$link_attr{'-href'}\" ".
2944                               "type=\"$link_attr{'-type'}\" ".
2945                               "/>\n";
2946                 }
2947
2948         } else {
2949                 printf('<link rel="alternate" title="%s projects list" '.
2950                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
2951                        $site_name, href(project=>undef, action=>"project_index"));
2952                 printf('<link rel="alternate" title="%s projects feeds" '.
2953                        'href="%s" type="text/x-opml" />'."\n",
2954                        $site_name, href(project=>undef, action=>"opml"));
2955         }
2956         if (defined $favicon) {
2957                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
2958         }
2959
2960         print "</head>\n" .
2961               "<body>\n";
2962
2963         if (-f $site_header) {
2964                 insert_file($site_header);
2965         }
2966
2967         print "<div class=\"page_header\">\n" .
2968               $cgi->a({-href => esc_url($logo_url),
2969                        -title => $logo_label},
2970                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2971         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2972         if (defined $project) {
2973                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
2974                 if (defined $action) {
2975                         print " / $action";
2976                 }
2977                 print "\n";
2978         }
2979         print "</div>\n";
2980
2981         my $have_search = gitweb_check_feature('search');
2982         if (defined $project && $have_search) {
2983                 if (!defined $searchtext) {
2984                         $searchtext = "";
2985                 }
2986                 my $search_hash;
2987                 if (defined $hash_base) {
2988                         $search_hash = $hash_base;
2989                 } elsif (defined $hash) {
2990                         $search_hash = $hash;
2991                 } else {
2992                         $search_hash = "HEAD";
2993                 }
2994                 my $action = $my_uri;
2995                 my $use_pathinfo = gitweb_check_feature('pathinfo');
2996                 if ($use_pathinfo) {
2997                         $action .= "/".esc_url($project);
2998                 }
2999                 print $cgi->startform(-method => "get", -action => $action) .
3000                       "<div class=\"search\">\n" .
3001                       (!$use_pathinfo &&
3002                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3003                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3004                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3005                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3006                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3007                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3008                       " search:\n",
3009                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3010                       "<span title=\"Extended regular expression\">" .
3011                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3012                                      -checked => $search_use_regexp) .
3013                       "</span>" .
3014                       "</div>" .
3015                       $cgi->end_form() . "\n";
3016         }
3017 }
3018
3019 sub git_footer_html {
3020         my $feed_class = 'rss_logo';
3021
3022         print "<div class=\"page_footer\">\n";
3023         if (defined $project) {
3024                 my $descr = git_get_project_description($project);
3025                 if (defined $descr) {
3026                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3027                 }
3028
3029                 my %href_params = get_feed_info();
3030                 if (!%href_params) {
3031                         $feed_class .= ' generic';
3032                 }
3033                 $href_params{'-title'} ||= 'log';
3034
3035                 foreach my $format qw(RSS Atom) {
3036                         $href_params{'action'} = lc($format);
3037                         print $cgi->a({-href => href(%href_params),
3038                                       -title => "$href_params{'-title'} $format feed",
3039                                       -class => $feed_class}, $format)."\n";
3040                 }
3041
3042         } else {
3043                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3044                               -class => $feed_class}, "OPML") . " ";
3045                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3046                               -class => $feed_class}, "TXT") . "\n";
3047         }
3048         print "</div>\n"; # class="page_footer"
3049
3050         if (-f $site_footer) {
3051                 insert_file($site_footer);
3052         }
3053
3054         print "</body>\n" .
3055               "</html>";
3056 }
3057
3058 # die_error(<http_status_code>, <error_message>)
3059 # Example: die_error(404, 'Hash not found')
3060 # By convention, use the following status codes (as defined in RFC 2616):
3061 # 400: Invalid or missing CGI parameters, or
3062 #      requested object exists but has wrong type.
3063 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3064 #      this server or project.
3065 # 404: Requested object/revision/project doesn't exist.
3066 # 500: The server isn't configured properly, or
3067 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3068 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3069 sub die_error {
3070         my $status = shift || 500;
3071         my $error = shift || "Internal server error";
3072
3073         my %http_responses = (400 => '400 Bad Request',
3074                               403 => '403 Forbidden',
3075                               404 => '404 Not Found',
3076                               500 => '500 Internal Server Error');
3077         git_header_html($http_responses{$status});
3078         print <<EOF;
3079 <div class="page_body">
3080 <br /><br />
3081 $status - $error
3082 <br />
3083 </div>
3084 EOF
3085         git_footer_html();
3086         exit;
3087 }
3088
3089 ## ----------------------------------------------------------------------
3090 ## functions printing or outputting HTML: navigation
3091
3092 sub git_print_page_nav {
3093         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3094         $extra = '' if !defined $extra; # pager or formats
3095
3096         my @navs = qw(summary shortlog log commit commitdiff tree);
3097         if ($suppress) {
3098                 @navs = grep { $_ ne $suppress } @navs;
3099         }
3100
3101         my %arg = map { $_ => {action=>$_} } @navs;
3102         if (defined $head) {
3103                 for (qw(commit commitdiff)) {
3104                         $arg{$_}{'hash'} = $head;
3105                 }
3106                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3107                         for (qw(shortlog log)) {
3108                                 $arg{$_}{'hash'} = $head;
3109                         }
3110                 }
3111         }
3112
3113         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3114         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3115
3116         my @actions = gitweb_get_feature('actions');
3117         my %repl = (
3118                 '%' => '%',
3119                 'n' => $project,         # project name
3120                 'f' => $git_dir,         # project path within filesystem
3121                 'h' => $treehead || '',  # current hash ('h' parameter)
3122                 'b' => $treebase || '',  # hash base ('hb' parameter)
3123         );
3124         while (@actions) {
3125                 my ($label, $link, $pos) = splice(@actions,0,3);
3126                 # insert
3127                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3128                 # munch munch
3129                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3130                 $arg{$label}{'_href'} = $link;
3131         }
3132
3133         print "<div class=\"page_nav\">\n" .
3134                 (join " | ",
3135                  map { $_ eq $current ?
3136                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3137                  } @navs);
3138         print "<br/>\n$extra<br/>\n" .
3139               "</div>\n";
3140 }
3141
3142 sub format_paging_nav {
3143         my ($action, $hash, $head, $page, $has_next_link) = @_;
3144         my $paging_nav;
3145
3146
3147         if ($hash ne $head || $page) {
3148                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3149         } else {
3150                 $paging_nav .= "HEAD";
3151         }
3152
3153         if ($page > 0) {
3154                 $paging_nav .= " &sdot; " .
3155                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3156                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3157         } else {
3158                 $paging_nav .= " &sdot; prev";
3159         }
3160
3161         if ($has_next_link) {
3162                 $paging_nav .= " &sdot; " .
3163                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3164                                  -accesskey => "n", -title => "Alt-n"}, "next");
3165         } else {
3166                 $paging_nav .= " &sdot; next";
3167         }
3168
3169         return $paging_nav;
3170 }
3171
3172 ## ......................................................................
3173 ## functions printing or outputting HTML: div
3174
3175 sub git_print_header_div {
3176         my ($action, $title, $hash, $hash_base) = @_;
3177         my %args = ();
3178
3179         $args{'action'} = $action;
3180         $args{'hash'} = $hash if $hash;
3181         $args{'hash_base'} = $hash_base if $hash_base;
3182
3183         print "<div class=\"header\">\n" .
3184               $cgi->a({-href => href(%args), -class => "title"},
3185               $title ? $title : $action) .
3186               "\n</div>\n";
3187 }
3188
3189 #sub git_print_authorship (\%) {
3190 sub git_print_authorship {
3191         my $co = shift;
3192
3193         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3194         print "<div class=\"author_date\">" .
3195               esc_html($co->{'author_name'}) .
3196               " [$ad{'rfc2822'}";
3197         if ($ad{'hour_local'} < 6) {
3198                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3199                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3200         } else {
3201                 printf(" (%02d:%02d %s)",
3202                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3203         }
3204         print "]</div>\n";
3205 }
3206
3207 sub git_print_page_path {
3208         my $name = shift;
3209         my $type = shift;
3210         my $hb = shift;
3211
3212
3213         print "<div class=\"page_path\">";
3214         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3215                       -title => 'tree root'}, to_utf8("[$project]"));
3216         print " / ";
3217         if (defined $name) {
3218                 my @dirname = split '/', $name;
3219                 my $basename = pop @dirname;
3220                 my $fullname = '';
3221
3222                 foreach my $dir (@dirname) {
3223                         $fullname .= ($fullname ? '/' : '') . $dir;
3224                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3225                                                      hash_base=>$hb),
3226                                       -title => $fullname}, esc_path($dir));
3227                         print " / ";
3228                 }
3229                 if (defined $type && $type eq 'blob') {
3230                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3231                                                      hash_base=>$hb),
3232                                       -title => $name}, esc_path($basename));
3233                 } elsif (defined $type && $type eq 'tree') {
3234                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3235                                                      hash_base=>$hb),
3236                                       -title => $name}, esc_path($basename));
3237                         print " / ";
3238                 } else {
3239                         print esc_path($basename);
3240                 }
3241         }
3242         print "<br/></div>\n";
3243 }
3244
3245 # sub git_print_log (\@;%) {
3246 sub git_print_log ($;%) {
3247         my $log = shift;
3248         my %opts = @_;
3249
3250         if ($opts{'-remove_title'}) {
3251                 # remove title, i.e. first line of log
3252                 shift @$log;
3253         }
3254         # remove leading empty lines
3255         while (defined $log->[0] && $log->[0] eq "") {
3256                 shift @$log;
3257         }
3258
3259         # print log
3260         my $signoff = 0;
3261         my $empty = 0;
3262         foreach my $line (@$log) {
3263                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3264                         $signoff = 1;
3265                         $empty = 0;
3266                         if (! $opts{'-remove_signoff'}) {
3267                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3268                                 next;
3269                         } else {
3270                                 # remove signoff lines
3271                                 next;
3272                         }
3273                 } else {
3274                         $signoff = 0;
3275                 }
3276
3277                 # print only one empty line
3278                 # do not print empty line after signoff
3279                 if ($line eq "") {
3280                         next if ($empty || $signoff);
3281                         $empty = 1;
3282                 } else {
3283                         $empty = 0;
3284                 }
3285
3286                 print format_log_line_html($line) . "<br/>\n";
3287         }
3288
3289         if ($opts{'-final_empty_line'}) {
3290                 # end with single empty line
3291                 print "<br/>\n" unless $empty;
3292         }
3293 }
3294
3295 # return link target (what link points to)
3296 sub git_get_link_target {
3297         my $hash = shift;
3298         my $link_target;
3299
3300         # read link
3301         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3302                 or return;
3303         {
3304                 local $/;
3305                 $link_target = <$fd>;
3306         }
3307         close $fd
3308                 or return;
3309
3310         return $link_target;
3311 }
3312
3313 # given link target, and the directory (basedir) the link is in,
3314 # return target of link relative to top directory (top tree);
3315 # return undef if it is not possible (including absolute links).
3316 sub normalize_link_target {
3317         my ($link_target, $basedir, $hash_base) = @_;
3318
3319         # we can normalize symlink target only if $hash_base is provided
3320         return unless $hash_base;
3321
3322         # absolute symlinks (beginning with '/') cannot be normalized
3323         return if (substr($link_target, 0, 1) eq '/');
3324
3325         # normalize link target to path from top (root) tree (dir)
3326         my $path;
3327         if ($basedir) {
3328                 $path = $basedir . '/' . $link_target;
3329         } else {
3330                 # we are in top (root) tree (dir)
3331                 $path = $link_target;
3332         }
3333
3334         # remove //, /./, and /../
3335         my @path_parts;
3336         foreach my $part (split('/', $path)) {
3337                 # discard '.' and ''
3338                 next if (!$part || $part eq '.');
3339                 # handle '..'
3340                 if ($part eq '..') {
3341                         if (@path_parts) {
3342                                 pop @path_parts;
3343                         } else {
3344                                 # link leads outside repository (outside top dir)
3345                                 return;
3346                         }
3347                 } else {
3348                         push @path_parts, $part;
3349                 }
3350         }
3351         $path = join('/', @path_parts);
3352
3353         return $path;
3354 }
3355
3356 # print tree entry (row of git_tree), but without encompassing <tr> element
3357 sub git_print_tree_entry {
3358         my ($t, $basedir, $hash_base, $have_blame) = @_;
3359
3360         my %base_key = ();
3361         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3362
3363         # The format of a table row is: mode list link.  Where mode is
3364         # the mode of the entry, list is the name of the entry, an href,
3365         # and link is the action links of the entry.
3366
3367         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3368         if ($t->{'type'} eq "blob") {
3369                 print "<td class=\"list\">" .
3370                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3371                                                file_name=>"$basedir$t->{'name'}", %base_key),
3372                                 -class => "list"}, esc_path($t->{'name'}));
3373                 if (S_ISLNK(oct $t->{'mode'})) {
3374                         my $link_target = git_get_link_target($t->{'hash'});
3375                         if ($link_target) {
3376                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
3377                                 if (defined $norm_target) {
3378                                         print " -> " .
3379                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3380                                                                      file_name=>$norm_target),
3381                                                        -title => $norm_target}, esc_path($link_target));
3382                                 } else {
3383                                         print " -> " . esc_path($link_target);
3384                                 }
3385                         }
3386                 }
3387                 print "</td>\n";
3388                 print "<td class=\"link\">";
3389                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3390                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3391                               "blob");
3392                 if ($have_blame) {
3393                         print " | " .
3394                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3395                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3396                                       "blame");
3397                 }
3398                 if (defined $hash_base) {
3399                         print " | " .
3400                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3401                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3402                                       "history");
3403                 }
3404                 print " | " .
3405                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3406                                                file_name=>"$basedir$t->{'name'}")},
3407                                 "raw");
3408                 print "</td>\n";
3409
3410         } elsif ($t->{'type'} eq "tree") {
3411                 print "<td class=\"list\">";
3412                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3413                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3414                               esc_path($t->{'name'}));
3415                 print "</td>\n";
3416                 print "<td class=\"link\">";
3417                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3418                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3419                               "tree");
3420                 if (defined $hash_base) {
3421                         print " | " .
3422                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3423                                                      file_name=>"$basedir$t->{'name'}")},
3424                                       "history");
3425                 }
3426                 print "</td>\n";
3427         } else {
3428                 # unknown object: we can only present history for it
3429                 # (this includes 'commit' object, i.e. submodule support)
3430                 print "<td class=\"list\">" .
3431                       esc_path($t->{'name'}) .
3432                       "</td>\n";
3433                 print "<td class=\"link\">";
3434                 if (defined $hash_base) {
3435                         print $cgi->a({-href => href(action=>"history",
3436                                                      hash_base=>$hash_base,
3437                                                      file_name=>"$basedir$t->{'name'}")},
3438                                       "history");
3439                 }
3440                 print "</td>\n";
3441         }
3442 }
3443
3444 ## ......................................................................
3445 ## functions printing large fragments of HTML
3446
3447 # get pre-image filenames for merge (combined) diff
3448 sub fill_from_file_info {
3449         my ($diff, @parents) = @_;
3450
3451         $diff->{'from_file'} = [ ];
3452         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3453         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3454                 if ($diff->{'status'}[$i] eq 'R' ||
3455                     $diff->{'status'}[$i] eq 'C') {
3456                         $diff->{'from_file'}[$i] =
3457                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3458                 }
3459         }
3460
3461         return $diff;
3462 }
3463
3464 # is current raw difftree line of file deletion
3465 sub is_deleted {
3466         my $diffinfo = shift;
3467
3468         return $diffinfo->{'to_id'} eq ('0' x 40);
3469 }
3470
3471 # does patch correspond to [previous] difftree raw line
3472 # $diffinfo  - hashref of parsed raw diff format
3473 # $patchinfo - hashref of parsed patch diff format
3474 #              (the same keys as in $diffinfo)
3475 sub is_patch_split {
3476         my ($diffinfo, $patchinfo) = @_;
3477
3478         return defined $diffinfo && defined $patchinfo
3479                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3480 }
3481
3482
3483 sub git_difftree_body {
3484         my ($difftree, $hash, @parents) = @_;
3485         my ($parent) = $parents[0];
3486         my $have_blame = gitweb_check_feature('blame');
3487         print "<div class=\"list_head\">\n";
3488         if ($#{$difftree} > 10) {
3489                 print(($#{$difftree} + 1) . " files changed:\n");
3490         }
3491         print "</div>\n";
3492
3493         print "<table class=\"" .
3494               (@parents > 1 ? "combined " : "") .
3495               "diff_tree\">\n";
3496
3497         # header only for combined diff in 'commitdiff' view
3498         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3499         if ($has_header) {
3500                 # table header
3501                 print "<thead><tr>\n" .
3502                        "<th></th><th></th>\n"; # filename, patchN link
3503                 for (my $i = 0; $i < @parents; $i++) {
3504                         my $par = $parents[$i];
3505                         print "<th>" .
3506                               $cgi->a({-href => href(action=>"commitdiff",
3507                                                      hash=>$hash, hash_parent=>$par),
3508                                        -title => 'commitdiff to parent number ' .
3509                                                   ($i+1) . ': ' . substr($par,0,7)},
3510                                       $i+1) .
3511                               "&nbsp;</th>\n";
3512                 }
3513                 print "</tr></thead>\n<tbody>\n";
3514         }
3515
3516         my $alternate = 1;
3517         my $patchno = 0;
3518         foreach my $line (@{$difftree}) {
3519                 my $diff = parsed_difftree_line($line);
3520
3521                 if ($alternate) {
3522                         print "<tr class=\"dark\">\n";
3523                 } else {
3524                         print "<tr class=\"light\">\n";
3525                 }
3526                 $alternate ^= 1;
3527
3528                 if (exists $diff->{'nparents'}) { # combined diff
3529
3530                         fill_from_file_info($diff, @parents)
3531                                 unless exists $diff->{'from_file'};
3532
3533                         if (!is_deleted($diff)) {
3534                                 # file exists in the result (child) commit
3535                                 print "<td>" .
3536                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3537                                                              file_name=>$diff->{'to_file'},
3538                                                              hash_base=>$hash),
3539                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3540                                       "</td>\n";
3541                         } else {
3542                                 print "<td>" .
3543                                       esc_path($diff->{'to_file'}) .
3544                                       "</td>\n";
3545                         }
3546
3547                         if ($action eq 'commitdiff') {
3548                                 # link to patch
3549                                 $patchno++;
3550                                 print "<td class=\"link\">" .
3551                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3552                                       " | " .
3553                                       "</td>\n";
3554                         }
3555
3556                         my $has_history = 0;
3557                         my $not_deleted = 0;
3558                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3559                                 my $hash_parent = $parents[$i];
3560                                 my $from_hash = $diff->{'from_id'}[$i];
3561                                 my $from_path = $diff->{'from_file'}[$i];
3562                                 my $status = $diff->{'status'}[$i];
3563
3564                                 $has_history ||= ($status ne 'A');
3565                                 $not_deleted ||= ($status ne 'D');
3566
3567                                 if ($status eq 'A') {
3568                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3569                                 } elsif ($status eq 'D') {
3570                                         print "<td class=\"link\">" .
3571                                               $cgi->a({-href => href(action=>"blob",
3572                                                                      hash_base=>$hash,
3573                                                                      hash=>$from_hash,
3574                                                                      file_name=>$from_path)},
3575                                                       "blob" . ($i+1)) .
3576                                               " | </td>\n";
3577                                 } else {
3578                                         if ($diff->{'to_id'} eq $from_hash) {
3579                                                 print "<td class=\"link nochange\">";
3580                                         } else {
3581                                                 print "<td class=\"link\">";
3582                                         }
3583                                         print $cgi->a({-href => href(action=>"blobdiff",
3584                                                                      hash=>$diff->{'to_id'},
3585                                                                      hash_parent=>$from_hash,
3586                                                                      hash_base=>$hash,
3587                                                                      hash_parent_base=>$hash_parent,
3588                                                                      file_name=>$diff->{'to_file'},
3589                                                                      file_parent=>$from_path)},
3590                                                       "diff" . ($i+1)) .
3591                                               " | </td>\n";
3592                                 }
3593                         }
3594
3595                         print "<td class=\"link\">";
3596                         if ($not_deleted) {
3597                                 print $cgi->a({-href => href(action=>"blob",
3598                                                              hash=>$diff->{'to_id'},
3599                                                              file_name=>$diff->{'to_file'},
3600                                                              hash_base=>$hash)},
3601                                               "blob");
3602                                 print " | " if ($has_history);
3603                         }
3604                         if ($has_history) {
3605                                 print $cgi->a({-href => href(action=>"history",
3606                                                              file_name=>$diff->{'to_file'},
3607                                                              hash_base=>$hash)},
3608                                               "history");
3609                         }
3610                         print "</td>\n";
3611
3612                         print "</tr>\n";
3613                         next; # instead of 'else' clause, to avoid extra indent
3614                 }
3615                 # else ordinary diff
3616
3617                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3618                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3619                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3620                         $to_mode_oct = oct $diff->{'to_mode'};
3621                         if (S_ISREG($to_mode_oct)) { # only for regular file
3622                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3623                         }
3624                         $to_file_type = file_type($diff->{'to_mode'});
3625                 }
3626                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3627                         $from_mode_oct = oct $diff->{'from_mode'};
3628                         if (S_ISREG($to_mode_oct)) { # only for regular file
3629                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3630                         }
3631                         $from_file_type = file_type($diff->{'from_mode'});
3632                 }
3633
3634                 if ($diff->{'status'} eq "A") { # created
3635                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3636                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3637                         $mode_chng   .= "]</span>";
3638                         print "<td>";
3639                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3640                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3641                                       -class => "list"}, esc_path($diff->{'file'}));
3642                         print "</td>\n";
3643                         print "<td>$mode_chng</td>\n";
3644                         print "<td class=\"link\">";
3645                         if ($action eq 'commitdiff') {
3646                                 # link to patch
3647                                 $patchno++;
3648                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3649                                 print " | ";
3650                         }
3651                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3652                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3653                                       "blob");
3654                         print "</td>\n";
3655
3656                 } elsif ($diff->{'status'} eq "D") { # deleted
3657                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3658                         print "<td>";
3659                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3660                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3661                                        -class => "list"}, esc_path($diff->{'file'}));
3662                         print "</td>\n";
3663                         print "<td>$mode_chng</td>\n";
3664                         print "<td class=\"link\">";
3665                         if ($action eq 'commitdiff') {
3666                                 # link to patch
3667                                 $patchno++;
3668                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3669                                 print " | ";
3670                         }
3671                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3672                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3673                                       "blob") . " | ";
3674                         if ($have_blame) {
3675                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3676                                                              file_name=>$diff->{'file'})},
3677                                               "blame") . " | ";
3678                         }
3679                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3680                                                      file_name=>$diff->{'file'})},
3681                                       "history");
3682                         print "</td>\n";
3683
3684                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3685                         my $mode_chnge = "";
3686                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3687                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3688                                 if ($from_file_type ne $to_file_type) {
3689                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3690                                 }
3691                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3692                                         if ($from_mode_str && $to_mode_str) {
3693                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3694                                         } elsif ($to_mode_str) {
3695                                                 $mode_chnge .= " mode: $to_mode_str";
3696                                         }
3697                                 }
3698                                 $mode_chnge .= "]</span>\n";
3699                         }
3700                         print "<td>";
3701                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3702                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3703                                       -class => "list"}, esc_path($diff->{'file'}));
3704                         print "</td>\n";
3705                         print "<td>$mode_chnge</td>\n";
3706                         print "<td class=\"link\">";
3707                         if ($action eq 'commitdiff') {
3708                                 # link to patch
3709                                 $patchno++;
3710                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3711                                       " | ";
3712                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3713                                 # "commit" view and modified file (not onlu mode changed)
3714                                 print $cgi->a({-href => href(action=>"blobdiff",
3715                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3716                                                              hash_base=>$hash, hash_parent_base=>$parent,
3717                                                              file_name=>$diff->{'file'})},
3718                                               "diff") .
3719                                       " | ";
3720                         }
3721                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3722                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3723                                        "blob") . " | ";
3724                         if ($have_blame) {
3725                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3726                                                              file_name=>$diff->{'file'})},
3727                                               "blame") . " | ";
3728                         }
3729                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3730                                                      file_name=>$diff->{'file'})},
3731                                       "history");
3732                         print "</td>\n";
3733
3734                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3735                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3736                         my $nstatus = $status_name{$diff->{'status'}};
3737                         my $mode_chng = "";
3738                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3739                                 # mode also for directories, so we cannot use $to_mode_str
3740                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3741                         }
3742                         print "<td>" .
3743                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3744                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3745                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3746                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3747                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3748                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3749                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3750                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3751                               "<td class=\"link\">";
3752                         if ($action eq 'commitdiff') {
3753                                 # link to patch
3754                                 $patchno++;
3755                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3756                                       " | ";
3757                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3758                                 # "commit" view and modified file (not only pure rename or copy)
3759                                 print $cgi->a({-href => href(action=>"blobdiff",
3760                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3761                                                              hash_base=>$hash, hash_parent_base=>$parent,
3762                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3763                                               "diff") .
3764                                       " | ";
3765                         }
3766                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3767                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3768                                       "blob") . " | ";
3769                         if ($have_blame) {
3770                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3771                                                              file_name=>$diff->{'to_file'})},
3772                                               "blame") . " | ";
3773                         }
3774                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3775                                                     file_name=>$diff->{'to_file'})},
3776                                       "history");
3777                         print "</td>\n";
3778
3779                 } # we should not encounter Unmerged (U) or Unknown (X) status
3780                 print "</tr>\n";
3781         }
3782         print "</tbody>" if $has_header;
3783         print "</table>\n";
3784 }
3785
3786 sub git_patchset_body {
3787         my ($fd, $difftree, $hash, @hash_parents) = @_;
3788         my ($hash_parent) = $hash_parents[0];
3789
3790         my $is_combined = (@hash_parents > 1);
3791         my $patch_idx = 0;
3792         my $patch_number = 0;
3793         my $patch_line;
3794         my $diffinfo;
3795         my $to_name;
3796         my (%from, %to);
3797
3798         print "<div class=\"patchset\">\n";
3799
3800         # skip to first patch
3801         while ($patch_line = <$fd>) {
3802                 chomp $patch_line;
3803
3804                 last if ($patch_line =~ m/^diff /);
3805         }
3806
3807  PATCH:
3808         while ($patch_line) {
3809
3810                 # parse "git diff" header line
3811                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3812                         # $1 is from_name, which we do not use
3813                         $to_name = unquote($2);
3814                         $to_name =~ s!^b/!!;
3815                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3816                         # $1 is 'cc' or 'combined', which we do not use
3817                         $to_name = unquote($2);
3818                 } else {
3819                         $to_name = undef;
3820                 }
3821
3822                 # check if current patch belong to current raw line
3823                 # and parse raw git-diff line if needed
3824                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3825                         # this is continuation of a split patch
3826                         print "<div class=\"patch cont\">\n";
3827                 } else {
3828                         # advance raw git-diff output if needed
3829                         $patch_idx++ if defined $diffinfo;
3830
3831                         # read and prepare patch information
3832                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3833
3834                         # compact combined diff output can have some patches skipped
3835                         # find which patch (using pathname of result) we are at now;
3836                         if ($is_combined) {
3837                                 while ($to_name ne $diffinfo->{'to_file'}) {
3838                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3839                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3840                                               "</div>\n";  # class="patch"
3841
3842                                         $patch_idx++;
3843                                         $patch_number++;
3844
3845                                         last if $patch_idx > $#$difftree;
3846                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3847                                 }
3848                         }
3849
3850                         # modifies %from, %to hashes
3851                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3852
3853                         # this is first patch for raw difftree line with $patch_idx index
3854                         # we index @$difftree array from 0, but number patches from 1
3855                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3856                 }
3857
3858                 # git diff header
3859                 #assert($patch_line =~ m/^diff /) if DEBUG;
3860                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3861                 $patch_number++;
3862                 # print "git diff" header
3863                 print format_git_diff_header_line($patch_line, $diffinfo,
3864                                                   \%from, \%to);
3865
3866                 # print extended diff header
3867                 print "<div class=\"diff extended_header\">\n";
3868         EXTENDED_HEADER:
3869                 while ($patch_line = <$fd>) {
3870                         chomp $patch_line;
3871
3872                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3873
3874                         print format_extended_diff_header_line($patch_line, $diffinfo,
3875                                                                \%from, \%to);
3876                 }
3877                 print "</div>\n"; # class="diff extended_header"
3878
3879                 # from-file/to-file diff header
3880                 if (! $patch_line) {
3881                         print "</div>\n"; # class="patch"
3882                         last PATCH;
3883                 }
3884                 next PATCH if ($patch_line =~ m/^diff /);
3885                 #assert($patch_line =~ m/^---/) if DEBUG;
3886
3887                 my $last_patch_line = $patch_line;
3888                 $patch_line = <$fd>;
3889                 chomp $patch_line;
3890                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3891
3892                 print format_diff_from_to_header($last_patch_line, $patch_line,
3893                                                  $diffinfo, \%from, \%to,
3894                                                  @hash_parents);
3895
3896                 # the patch itself
3897         LINE:
3898                 while ($patch_line = <$fd>) {
3899                         chomp $patch_line;
3900
3901                         next PATCH if ($patch_line =~ m/^diff /);
3902
3903                         print format_diff_line($patch_line, \%from, \%to);
3904                 }
3905
3906         } continue {
3907                 print "</div>\n"; # class="patch"
3908         }
3909
3910         # for compact combined (--cc) format, with chunk and patch simpliciaction
3911         # patchset might be empty, but there might be unprocessed raw lines
3912         for (++$patch_idx if $patch_number > 0;
3913              $patch_idx < @$difftree;
3914              ++$patch_idx) {
3915                 # read and prepare patch information
3916                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3917
3918                 # generate anchor for "patch" links in difftree / whatchanged part
3919                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3920                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3921                       "</div>\n";  # class="patch"
3922
3923                 $patch_number++;
3924         }
3925
3926         if ($patch_number == 0) {
3927                 if (@hash_parents > 1) {
3928                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3929                 } else {
3930                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3931                 }
3932         }
3933
3934         print "</div>\n"; # class="patchset"
3935 }
3936
3937 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3938
3939 # fills project list info (age, description, owner, forks) for each
3940 # project in the list, removing invalid projects from returned list
3941 # NOTE: modifies $projlist, but does not remove entries from it
3942 sub fill_project_list_info {
3943         my ($projlist, $check_forks) = @_;
3944         my @projects;
3945
3946         my $show_ctags = gitweb_check_feature('ctags');
3947  PROJECT:
3948         foreach my $pr (@$projlist) {
3949                 my (@activity) = git_get_last_activity($pr->{'path'});
3950                 unless (@activity) {
3951                         next PROJECT;
3952                 }
3953                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
3954                 if (!defined $pr->{'descr'}) {
3955                         my $descr = git_get_project_description($pr->{'path'}) || "";
3956                         $descr = to_utf8($descr);
3957                         $pr->{'descr_long'} = $descr;
3958                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3959                 }
3960                 if (!defined $pr->{'owner'}) {
3961                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3962                 }
3963                 if ($check_forks) {
3964                         my $pname = $pr->{'path'};
3965                         if (($pname =~ s/\.git$//) &&
3966                             ($pname !~ /\/$/) &&
3967                             (-d "$projectroot/$pname")) {
3968                                 $pr->{'forks'} = "-d $projectroot/$pname";
3969                         }       else {
3970                                 $pr->{'forks'} = 0;
3971                         }
3972                 }
3973                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
3974                 push @projects, $pr;
3975         }
3976
3977         return @projects;
3978 }
3979
3980 # print 'sort by' <th> element, generating 'sort by $name' replay link
3981 # if that order is not selected
3982 sub print_sort_th {
3983         my ($name, $order, $header) = @_;
3984         $header ||= ucfirst($name);
3985
3986         if ($order eq $name) {
3987                 print "<th>$header</th>\n";
3988         } else {
3989                 print "<th>" .
3990                       $cgi->a({-href => href(-replay=>1, order=>$name),
3991                                -class => "header"}, $header) .
3992                       "</th>\n";
3993         }
3994 }
3995
3996 sub git_project_list_body {
3997         # actually uses global variable $project
3998         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
3999
4000         my $check_forks = gitweb_check_feature('forks');
4001         my @projects = fill_project_list_info($projlist, $check_forks);
4002
4003         $order ||= $default_projects_order;
4004         $from = 0 unless defined $from;
4005         $to = $#projects if (!defined $to || $#projects < $to);
4006
4007         my %order_info = (
4008                 project => { key => 'path', type => 'str' },
4009                 descr => { key => 'descr_long', type => 'str' },
4010                 owner => { key => 'owner', type => 'str' },
4011                 age => { key => 'age', type => 'num' }
4012         );
4013         my $oi = $order_info{$order};
4014         if ($oi->{'type'} eq 'str') {
4015                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4016         } else {
4017                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4018         }
4019
4020         my $show_ctags = gitweb_check_feature('ctags');
4021         if ($show_ctags) {
4022                 my %ctags;
4023                 foreach my $p (@projects) {
4024                         foreach my $ct (keys %{$p->{'ctags'}}) {
4025                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4026                         }
4027                 }
4028                 my $cloud = git_populate_project_tagcloud(\%ctags);
4029                 print git_show_project_tagcloud($cloud, 64);
4030         }
4031
4032         print "<table class=\"project_list\">\n";
4033         unless ($no_header) {
4034                 print "<tr>\n";
4035                 if ($check_forks) {
4036                         print "<th></th>\n";
4037                 }
4038                 print_sort_th('project', $order, 'Project');
4039                 print_sort_th('descr', $order, 'Description');
4040                 print_sort_th('owner', $order, 'Owner');
4041                 print_sort_th('age', $order, 'Last Change');
4042                 print "<th></th>\n" . # for links
4043                       "</tr>\n";
4044         }
4045         my $alternate = 1;
4046         my $tagfilter = $cgi->param('by_tag');
4047         for (my $i = $from; $i <= $to; $i++) {
4048                 my $pr = $projects[$i];
4049
4050                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4051                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4052                         and not $pr->{'descr_long'} =~ /$searchtext/;
4053                 # Weed out forks or non-matching entries of search
4054                 if ($check_forks) {
4055                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4056                         $forkbase="^$forkbase" if $forkbase;
4057                         next if not $searchtext and not $tagfilter and $show_ctags
4058                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4059                 }
4060
4061                 if ($alternate) {
4062                         print "<tr class=\"dark\">\n";
4063                 } else {
4064                         print "<tr class=\"light\">\n";
4065                 }
4066                 $alternate ^= 1;
4067                 if ($check_forks) {
4068                         print "<td>";
4069                         if ($pr->{'forks'}) {
4070                                 print "<!-- $pr->{'forks'} -->\n";
4071                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4072                         }
4073                         print "</td>\n";
4074                 }
4075                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4076                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4077                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4078                                         -class => "list", -title => $pr->{'descr_long'}},
4079                                         esc_html($pr->{'descr'})) . "</td>\n" .
4080                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4081                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4082                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4083                       "<td class=\"link\">" .
4084                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4085                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4086                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4087                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4088                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4089                       "</td>\n" .
4090                       "</tr>\n";
4091         }
4092         if (defined $extra) {
4093                 print "<tr>\n";
4094                 if ($check_forks) {
4095                         print "<td></td>\n";
4096                 }
4097                 print "<td colspan=\"5\">$extra</td>\n" .
4098                       "</tr>\n";
4099         }
4100         print "</table>\n";
4101 }
4102
4103 sub git_shortlog_body {
4104         # uses global variable $project
4105         my ($commitlist, $from, $to, $refs, $extra) = @_;
4106
4107         $from = 0 unless defined $from;
4108         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4109
4110         print "<table class=\"shortlog\">\n";
4111         my $alternate = 1;
4112         for (my $i = $from; $i <= $to; $i++) {
4113                 my %co = %{$commitlist->[$i]};
4114                 my $commit = $co{'id'};
4115                 my $ref = format_ref_marker($refs, $commit);
4116                 if ($alternate) {
4117                         print "<tr class=\"dark\">\n";
4118                 } else {
4119                         print "<tr class=\"light\">\n";
4120                 }
4121                 $alternate ^= 1;
4122                 my $author = chop_and_escape_str($co{'author_name'}, 10);
4123                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4124                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4125                       "<td><i>" . $author . "</i></td>\n" .
4126                       "<td>";
4127                 print format_subject_html($co{'title'}, $co{'title_short'},
4128                                           href(action=>"commit", hash=>$commit), $ref);
4129                 print "</td>\n" .
4130                       "<td class=\"link\">" .
4131                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4132                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4133                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4134                 my $snapshot_links = format_snapshot_links($commit);
4135                 if (defined $snapshot_links) {
4136                         print " | " . $snapshot_links;
4137                 }
4138                 print "</td>\n" .
4139                       "</tr>\n";
4140         }
4141         if (defined $extra) {
4142                 print "<tr>\n" .
4143                       "<td colspan=\"4\">$extra</td>\n" .
4144                       "</tr>\n";
4145         }
4146         print "</table>\n";
4147 }
4148
4149 sub git_history_body {
4150         # Warning: assumes constant type (blob or tree) during history
4151         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4152
4153         $from = 0 unless defined $from;
4154         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4155
4156         print "<table class=\"history\">\n";
4157         my $alternate = 1;
4158         for (my $i = $from; $i <= $to; $i++) {
4159                 my %co = %{$commitlist->[$i]};
4160                 if (!%co) {
4161                         next;
4162                 }
4163                 my $commit = $co{'id'};
4164
4165                 my $ref = format_ref_marker($refs, $commit);
4166
4167                 if ($alternate) {
4168                         print "<tr class=\"dark\">\n";
4169                 } else {
4170                         print "<tr class=\"light\">\n";
4171                 }
4172                 $alternate ^= 1;
4173         # shortlog uses      chop_str($co{'author_name'}, 10)
4174                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
4175                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4176                       "<td><i>" . $author . "</i></td>\n" .
4177                       "<td>";
4178                 # originally git_history used chop_str($co{'title'}, 50)
4179                 print format_subject_html($co{'title'}, $co{'title_short'},
4180                                           href(action=>"commit", hash=>$commit), $ref);
4181                 print "</td>\n" .
4182                       "<td class=\"link\">" .
4183                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4184                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4185
4186                 if ($ftype eq 'blob') {
4187                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4188                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4189                         if (defined $blob_current && defined $blob_parent &&
4190                                         $blob_current ne $blob_parent) {
4191                                 print " | " .
4192                                         $cgi->a({-href => href(action=>"blobdiff",
4193                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4194                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4195                                                                file_name=>$file_name)},
4196                                                 "diff to current");
4197                         }
4198                 }
4199                 print "</td>\n" .
4200                       "</tr>\n";
4201         }
4202         if (defined $extra) {
4203                 print "<tr>\n" .
4204                       "<td colspan=\"4\">$extra</td>\n" .
4205                       "</tr>\n";
4206         }
4207         print "</table>\n";
4208 }
4209
4210 sub git_tags_body {
4211         # uses global variable $project
4212         my ($taglist, $from, $to, $extra) = @_;
4213         $from = 0 unless defined $from;
4214         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4215
4216         print "<table class=\"tags\">\n";
4217         my $alternate = 1;
4218         for (my $i = $from; $i <= $to; $i++) {
4219                 my $entry = $taglist->[$i];
4220                 my %tag = %$entry;
4221                 my $comment = $tag{'subject'};
4222                 my $comment_short;
4223                 if (defined $comment) {
4224                         $comment_short = chop_str($comment, 30, 5);
4225                 }
4226                 if ($alternate) {
4227                         print "<tr class=\"dark\">\n";
4228                 } else {
4229                         print "<tr class=\"light\">\n";
4230                 }
4231                 $alternate ^= 1;
4232                 if (defined $tag{'age'}) {
4233                         print "<td><i>$tag{'age'}</i></td>\n";
4234                 } else {
4235                         print "<td></td>\n";
4236                 }
4237                 print "<td>" .
4238                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4239                                -class => "list name"}, esc_html($tag{'name'})) .
4240                       "</td>\n" .
4241                       "<td>";
4242                 if (defined $comment) {
4243                         print format_subject_html($comment, $comment_short,
4244                                                   href(action=>"tag", hash=>$tag{'id'}));
4245                 }
4246                 print "</td>\n" .
4247                       "<td class=\"selflink\">";
4248                 if ($tag{'type'} eq "tag") {
4249                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4250                 } else {
4251                         print "&nbsp;";
4252                 }
4253                 print "</td>\n" .
4254                       "<td class=\"link\">" . " | " .
4255                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4256                 if ($tag{'reftype'} eq "commit") {
4257                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4258                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4259                 } elsif ($tag{'reftype'} eq "blob") {
4260                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4261                 }
4262                 print "</td>\n" .
4263                       "</tr>";
4264         }
4265         if (defined $extra) {
4266                 print "<tr>\n" .
4267                       "<td colspan=\"5\">$extra</td>\n" .
4268                       "</tr>\n";
4269         }
4270         print "</table>\n";
4271 }
4272
4273 sub git_heads_body {
4274         # uses global variable $project
4275         my ($headlist, $head, $from, $to, $extra) = @_;
4276         $from = 0 unless defined $from;
4277         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4278
4279         print "<table class=\"heads\">\n";
4280         my $alternate = 1;
4281         for (my $i = $from; $i <= $to; $i++) {
4282                 my $entry = $headlist->[$i];
4283                 my %ref = %$entry;
4284                 my $curr = $ref{'id'} eq $head;
4285                 if ($alternate) {
4286                         print "<tr class=\"dark\">\n";
4287                 } else {
4288                         print "<tr class=\"light\">\n";
4289                 }
4290                 $alternate ^= 1;
4291                 print "<td><i>$ref{'age'}</i></td>\n" .
4292                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4293                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4294                                -class => "list name"},esc_html($ref{'name'})) .
4295                       "</td>\n" .
4296                       "<td class=\"link\">" .
4297                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4298                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4299                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4300                       "</td>\n" .
4301                       "</tr>";
4302         }
4303         if (defined $extra) {
4304                 print "<tr>\n" .
4305                       "<td colspan=\"3\">$extra</td>\n" .
4306                       "</tr>\n";
4307         }
4308         print "</table>\n";
4309 }
4310
4311 sub git_search_grep_body {
4312         my ($commitlist, $from, $to, $extra) = @_;
4313         $from = 0 unless defined $from;
4314         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4315
4316         print "<table class=\"commit_search\">\n";
4317         my $alternate = 1;
4318         for (my $i = $from; $i <= $to; $i++) {
4319                 my %co = %{$commitlist->[$i]};
4320                 if (!%co) {
4321                         next;
4322                 }
4323                 my $commit = $co{'id'};
4324                 if ($alternate) {
4325                         print "<tr class=\"dark\">\n";
4326                 } else {
4327                         print "<tr class=\"light\">\n";
4328                 }
4329                 $alternate ^= 1;
4330                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
4331                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4332                       "<td><i>" . $author . "</i></td>\n" .
4333                       "<td>" .
4334                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4335                                -class => "list subject"},
4336                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4337                 my $comment = $co{'comment'};
4338                 foreach my $line (@$comment) {
4339                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4340                                 my ($lead, $match, $trail) = ($1, $2, $3);
4341                                 $match = chop_str($match, 70, 5, 'center');
4342                                 my $contextlen = int((80 - length($match))/2);
4343                                 $contextlen = 30 if ($contextlen > 30);
4344                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4345                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4346
4347                                 $lead  = esc_html($lead);
4348                                 $match = esc_html($match);
4349                                 $trail = esc_html($trail);
4350
4351                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4352                         }
4353                 }
4354                 print "</td>\n" .
4355                       "<td class=\"link\">" .
4356                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4357                       " | " .
4358                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4359                       " | " .
4360                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4361                 print "</td>\n" .
4362                       "</tr>\n";
4363         }
4364         if (defined $extra) {
4365                 print "<tr>\n" .
4366                       "<td colspan=\"3\">$extra</td>\n" .
4367                       "</tr>\n";
4368         }
4369         print "</table>\n";
4370 }
4371
4372 ## ======================================================================
4373 ## ======================================================================
4374 ## actions
4375
4376 sub git_project_list {
4377         my $order = $input_params{'order'};
4378         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4379                 die_error(400, "Unknown order parameter");
4380         }
4381
4382         my @list = git_get_projects_list();
4383         if (!@list) {
4384                 die_error(404, "No projects found");
4385         }
4386
4387         git_header_html();
4388         if (-f $home_text) {
4389                 print "<div class=\"index_include\">\n";
4390                 insert_file($home_text);
4391                 print "</div>\n";
4392         }
4393         print $cgi->startform(-method => "get") .
4394               "<p class=\"projsearch\">Search:\n" .
4395               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4396               "</p>" .
4397               $cgi->end_form() . "\n";
4398         git_project_list_body(\@list, $order);
4399         git_footer_html();
4400 }
4401
4402 sub git_forks {
4403         my $order = $input_params{'order'};
4404         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4405                 die_error(400, "Unknown order parameter");
4406         }
4407
4408         my @list = git_get_projects_list($project);
4409         if (!@list) {
4410                 die_error(404, "No forks found");
4411         }
4412
4413         git_header_html();
4414         git_print_page_nav('','');
4415         git_print_header_div('summary', "$project forks");
4416         git_project_list_body(\@list, $order);
4417         git_footer_html();
4418 }
4419
4420 sub git_project_index {
4421         my @projects = git_get_projects_list($project);
4422
4423         print $cgi->header(
4424                 -type => 'text/plain',
4425                 -charset => 'utf-8',
4426                 -content_disposition => 'inline; filename="index.aux"');
4427
4428         foreach my $pr (@projects) {
4429                 if (!exists $pr->{'owner'}) {
4430                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4431                 }
4432
4433                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4434                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4435                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4436                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4437                 $path  =~ s/ /\+/g;
4438                 $owner =~ s/ /\+/g;
4439
4440                 print "$path $owner\n";
4441         }
4442 }
4443
4444 sub git_summary {
4445         my $descr = git_get_project_description($project) || "none";
4446         my %co = parse_commit("HEAD");
4447         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4448         my $head = $co{'id'};
4449
4450         my $owner = git_get_project_owner($project);
4451
4452         my $refs = git_get_references();
4453         # These get_*_list functions return one more to allow us to see if
4454         # there are more ...
4455         my @taglist  = git_get_tags_list(16);
4456         my @headlist = git_get_heads_list(16);
4457         my @forklist;
4458         my $check_forks = gitweb_check_feature('forks');
4459
4460         if ($check_forks) {
4461                 @forklist = git_get_projects_list($project);
4462         }
4463
4464         git_header_html();
4465         git_print_page_nav('summary','', $head);
4466
4467         print "<div class=\"title\">&nbsp;</div>\n";
4468         print "<table class=\"projects_list\">\n" .
4469               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4470               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4471         if (defined $cd{'rfc2822'}) {
4472                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4473         }
4474
4475         # use per project git URL list in $projectroot/$project/cloneurl
4476         # or make project git URL from git base URL and project name
4477         my $url_tag = "URL";
4478         my @url_list = git_get_project_url_list($project);
4479         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4480         foreach my $git_url (@url_list) {
4481                 next unless $git_url;
4482                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4483                 $url_tag = "";
4484         }
4485
4486         # Tag cloud
4487         my $show_ctags = gitweb_check_feature('ctags');
4488         if ($show_ctags) {
4489                 my $ctags = git_get_project_ctags($project);
4490                 my $cloud = git_populate_project_tagcloud($ctags);
4491                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4492                 print "</td>\n<td>" unless %$ctags;
4493                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4494                 print "</td>\n<td>" if %$ctags;
4495                 print git_show_project_tagcloud($cloud, 48);
4496                 print "</td></tr>";
4497         }
4498
4499         print "</table>\n";
4500
4501         if (-s "$projectroot/$project/README.html") {
4502                 print "<div class=\"title\">readme</div>\n" .
4503                       "<div class=\"readme\">\n";
4504                 insert_file("$projectroot/$project/README.html");
4505                 print "\n</div>\n"; # class="readme"
4506         }
4507
4508         # we need to request one more than 16 (0..15) to check if
4509         # those 16 are all
4510         my @commitlist = $head ? parse_commits($head, 17) : ();
4511         if (@commitlist) {
4512                 git_print_header_div('shortlog');
4513                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4514                                   $#commitlist <=  15 ? undef :
4515                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4516         }
4517
4518         if (@taglist) {
4519                 git_print_header_div('tags');
4520                 git_tags_body(\@taglist, 0, 15,
4521                               $#taglist <=  15 ? undef :
4522                               $cgi->a({-href => href(action=>"tags")}, "..."));
4523         }
4524
4525         if (@headlist) {
4526                 git_print_header_div('heads');
4527                 git_heads_body(\@headlist, $head, 0, 15,
4528                                $#headlist <= 15 ? undef :
4529                                $cgi->a({-href => href(action=>"heads")}, "..."));
4530         }
4531
4532         if (@forklist) {
4533                 git_print_header_div('forks');
4534                 git_project_list_body(\@forklist, 'age', 0, 15,
4535                                       $#forklist <= 15 ? undef :
4536                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4537                                       'no_header');
4538         }
4539
4540         git_footer_html();
4541 }
4542
4543 sub git_tag {
4544         my $head = git_get_head_hash($project);
4545         git_header_html();
4546         git_print_page_nav('','', $head,undef,$head);
4547         my %tag = parse_tag($hash);
4548
4549         if (! %tag) {
4550                 die_error(404, "Unknown tag object");
4551         }
4552
4553         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4554         print "<div class=\"title_text\">\n" .
4555               "<table class=\"object_header\">\n" .
4556               "<tr>\n" .
4557               "<td>object</td>\n" .
4558               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4559                                $tag{'object'}) . "</td>\n" .
4560               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4561                                               $tag{'type'}) . "</td>\n" .
4562               "</tr>\n";
4563         if (defined($tag{'author'})) {
4564                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4565                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4566                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4567                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4568                         "</td></tr>\n";
4569         }
4570         print "</table>\n\n" .
4571               "</div>\n";
4572         print "<div class=\"page_body\">";
4573         my $comment = $tag{'comment'};
4574         foreach my $line (@$comment) {
4575                 chomp $line;
4576                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4577         }
4578         print "</div>\n";
4579         git_footer_html();
4580 }
4581
4582 sub git_blame {
4583         # permissions
4584         gitweb_check_feature('blame')
4585                 or die_error(403, "Blame view not allowed");
4586
4587         # error checking
4588         die_error(400, "No file name given") unless $file_name;
4589         $hash_base ||= git_get_head_hash($project);
4590         die_error(404, "Couldn't find base commit") unless $hash_base;
4591         my %co = parse_commit($hash_base)
4592                 or die_error(404, "Commit not found");
4593         my $ftype = "blob";
4594         if (!defined $hash) {
4595                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4596                         or die_error(404, "Error looking up file");
4597         } else {
4598                 $ftype = git_get_type($hash);
4599                 if ($ftype !~ "blob") {
4600                         die_error(400, "Object is not a blob");
4601                 }
4602         }
4603
4604         # run git-blame --porcelain
4605         open my $fd, "-|", git_cmd(), "blame", '-p',
4606                 $hash_base, '--', $file_name
4607                 or die_error(500, "Open git-blame failed");
4608
4609         # page header
4610         git_header_html();
4611         my $formats_nav =
4612                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4613                         "blob") .
4614                 " | " .
4615                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4616                         "history") .
4617                 " | " .
4618                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4619                         "HEAD");
4620         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4621         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4622         git_print_page_path($file_name, $ftype, $hash_base);
4623
4624         # page body
4625         my @rev_color = qw(light2 dark2);
4626         my $num_colors = scalar(@rev_color);
4627         my $current_color = 0;
4628         my %metainfo = ();
4629
4630         print <<HTML;
4631 <div class="page_body">
4632 <table class="blame">
4633 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4634 HTML
4635  LINE:
4636         while (my $line = <$fd>) {
4637                 chomp $line;
4638                 # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
4639                 # no <lines in group> for subsequent lines in group of lines
4640                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4641                    ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
4642                 if (!exists $metainfo{$full_rev}) {
4643                         $metainfo{$full_rev} = {};
4644                 }
4645                 my $meta = $metainfo{$full_rev};
4646                 my $data;
4647                 while ($data = <$fd>) {
4648                         chomp $data;
4649                         last if ($data =~ s/^\t//); # contents of line
4650                         if ($data =~ /^(\S+) (.*)$/) {
4651                                 $meta->{$1} = $2;
4652                         }
4653                 }
4654                 my $short_rev = substr($full_rev, 0, 8);
4655                 my $author = $meta->{'author'};
4656                 my %date =
4657                         parse_date($meta->{'author-time'}, $meta->{'author-tz'});
4658                 my $date = $date{'iso-tz'};
4659                 if ($group_size) {
4660                         $current_color = ($current_color + 1) % $num_colors;
4661                 }
4662                 print "<tr id=\"l$lineno\" class=\"$rev_color[$current_color]\">\n";
4663                 if ($group_size) {
4664                         print "<td class=\"sha1\"";
4665                         print " title=\"". esc_html($author) . ", $date\"";
4666                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4667                         print ">";
4668                         print $cgi->a({-href => href(action=>"commit",
4669                                                      hash=>$full_rev,
4670                                                      file_name=>$file_name)},
4671                                       esc_html($short_rev));
4672                         print "</td>\n";
4673                 }
4674                 my $parent_commit;
4675                 if (!exists $meta->{'parent'}) {
4676                         open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4677                                 or die_error(500, "Open git-rev-parse failed");
4678                         $parent_commit = <$dd>;
4679                         close $dd;
4680                         chomp($parent_commit);
4681                         $meta->{'parent'} = $parent_commit;
4682                 } else {
4683                         $parent_commit = $meta->{'parent'};
4684                 }
4685                 my $blamed = href(action => 'blame',
4686                                   file_name => $meta->{'filename'},
4687                                   hash_base => $parent_commit);
4688                 print "<td class=\"linenr\">";
4689                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4690                                 -class => "linenr" },
4691                               esc_html($lineno));
4692                 print "</td>";
4693                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4694                 print "</tr>\n";
4695         }
4696         print "</table>\n";
4697         print "</div>";
4698         close $fd
4699                 or print "Reading blob failed\n";
4700
4701         # page footer
4702         git_footer_html();
4703 }
4704
4705 sub git_tags {
4706         my $head = git_get_head_hash($project);
4707         git_header_html();
4708         git_print_page_nav('','', $head,undef,$head);
4709         git_print_header_div('summary', $project);
4710
4711         my @tagslist = git_get_tags_list();
4712         if (@tagslist) {
4713                 git_tags_body(\@tagslist);
4714         }
4715         git_footer_html();
4716 }
4717
4718 sub git_heads {
4719         my $head = git_get_head_hash($project);
4720         git_header_html();
4721         git_print_page_nav('','', $head,undef,$head);
4722         git_print_header_div('summary', $project);
4723
4724         my @headslist = git_get_heads_list();
4725         if (@headslist) {
4726                 git_heads_body(\@headslist, $head);
4727         }
4728         git_footer_html();
4729 }
4730
4731 sub git_blob_plain {
4732         my $type = shift;
4733         my $expires;
4734
4735         if (!defined $hash) {
4736                 if (defined $file_name) {
4737                         my $base = $hash_base || git_get_head_hash($project);
4738                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4739                                 or die_error(404, "Cannot find file");
4740                 } else {
4741                         die_error(400, "No file name defined");
4742                 }
4743         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4744                 # blobs defined by non-textual hash id's can be cached
4745                 $expires = "+1d";
4746         }
4747
4748         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4749                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4750
4751         # content-type (can include charset)
4752         $type = blob_contenttype($fd, $file_name, $type);
4753
4754         # "save as" filename, even when no $file_name is given
4755         my $save_as = "$hash";
4756         if (defined $file_name) {
4757                 $save_as = $file_name;
4758         } elsif ($type =~ m/^text\//) {
4759                 $save_as .= '.txt';
4760         }
4761
4762         print $cgi->header(
4763                 -type => $type,
4764                 -expires => $expires,
4765                 -content_disposition => 'inline; filename="' . $save_as . '"');
4766         undef $/;
4767         binmode STDOUT, ':raw';
4768         print <$fd>;
4769         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4770         $/ = "\n";
4771         close $fd;
4772 }
4773
4774 sub git_blob {
4775         my $expires;
4776
4777         if (!defined $hash) {
4778                 if (defined $file_name) {
4779                         my $base = $hash_base || git_get_head_hash($project);
4780                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4781                                 or die_error(404, "Cannot find file");
4782                 } else {
4783                         die_error(400, "No file name defined");
4784                 }
4785         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4786                 # blobs defined by non-textual hash id's can be cached
4787                 $expires = "+1d";
4788         }
4789
4790         my $have_blame = gitweb_check_feature('blame');
4791         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4792                 or die_error(500, "Couldn't cat $file_name, $hash");
4793         my $mimetype = blob_mimetype($fd, $file_name);
4794         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4795                 close $fd;
4796                 return git_blob_plain($mimetype);
4797         }
4798         # we can have blame only for text/* mimetype
4799         $have_blame &&= ($mimetype =~ m!^text/!);
4800
4801         git_header_html(undef, $expires);
4802         my $formats_nav = '';
4803         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4804                 if (defined $file_name) {
4805                         if ($have_blame) {
4806                                 $formats_nav .=
4807                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4808                                                 "blame") .
4809                                         " | ";
4810                         }
4811                         $formats_nav .=
4812                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4813                                         "history") .
4814                                 " | " .
4815                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4816                                         "raw") .
4817                                 " | " .
4818                                 $cgi->a({-href => href(action=>"blob",
4819                                                        hash_base=>"HEAD", file_name=>$file_name)},
4820                                         "HEAD");
4821                 } else {
4822                         $formats_nav .=
4823                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4824                                         "raw");
4825                 }
4826                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4827                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4828         } else {
4829                 print "<div class=\"page_nav\">\n" .
4830                       "<br/><br/></div>\n" .
4831                       "<div class=\"title\">$hash</div>\n";
4832         }
4833         git_print_page_path($file_name, "blob", $hash_base);
4834         print "<div class=\"page_body\">\n";
4835         if ($mimetype =~ m!^image/!) {
4836                 print qq!<img type="$mimetype"!;
4837                 if ($file_name) {
4838                         print qq! alt="$file_name" title="$file_name"!;
4839                 }
4840                 print qq! src="! .
4841                       href(action=>"blob_plain", hash=>$hash,
4842                            hash_base=>$hash_base, file_name=>$file_name) .
4843                       qq!" />\n!;
4844         } else {
4845                 my $nr;
4846                 while (my $line = <$fd>) {
4847                         chomp $line;
4848                         $nr++;
4849                         $line = untabify($line);
4850                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4851                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4852                 }
4853         }
4854         close $fd
4855                 or print "Reading blob failed.\n";
4856         print "</div>";
4857         git_footer_html();
4858 }
4859
4860 sub git_tree {
4861         if (!defined $hash_base) {
4862                 $hash_base = "HEAD";
4863         }
4864         if (!defined $hash) {
4865                 if (defined $file_name) {
4866                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4867                 } else {
4868                         $hash = $hash_base;
4869                 }
4870         }
4871         die_error(404, "No such tree") unless defined($hash);
4872         $/ = "\0";
4873         open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4874                 or die_error(500, "Open git-ls-tree failed");
4875         my @entries = map { chomp; $_ } <$fd>;
4876         close $fd or die_error(404, "Reading tree failed");
4877         $/ = "\n";
4878
4879         my $refs = git_get_references();
4880         my $ref = format_ref_marker($refs, $hash_base);
4881         git_header_html();
4882         my $basedir = '';
4883         my $have_blame = gitweb_check_feature('blame');
4884         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4885                 my @views_nav = ();
4886                 if (defined $file_name) {
4887                         push @views_nav,
4888                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4889                                         "history"),
4890                                 $cgi->a({-href => href(action=>"tree",
4891                                                        hash_base=>"HEAD", file_name=>$file_name)},
4892                                         "HEAD"),
4893                 }
4894                 my $snapshot_links = format_snapshot_links($hash);
4895                 if (defined $snapshot_links) {
4896                         # FIXME: Should be available when we have no hash base as well.
4897                         push @views_nav, $snapshot_links;
4898                 }
4899                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4900                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4901         } else {
4902                 undef $hash_base;
4903                 print "<div class=\"page_nav\">\n";
4904                 print "<br/><br/></div>\n";
4905                 print "<div class=\"title\">$hash</div>\n";
4906         }
4907         if (defined $file_name) {
4908                 $basedir = $file_name;
4909                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4910                         $basedir .= '/';
4911                 }
4912                 git_print_page_path($file_name, 'tree', $hash_base);
4913         }
4914         print "<div class=\"page_body\">\n";
4915         print "<table class=\"tree\">\n";
4916         my $alternate = 1;
4917         # '..' (top directory) link if possible
4918         if (defined $hash_base &&
4919             defined $file_name && $file_name =~ m![^/]+$!) {
4920                 if ($alternate) {
4921                         print "<tr class=\"dark\">\n";
4922                 } else {
4923                         print "<tr class=\"light\">\n";
4924                 }
4925                 $alternate ^= 1;
4926
4927                 my $up = $file_name;
4928                 $up =~ s!/?[^/]+$!!;
4929                 undef $up unless $up;
4930                 # based on git_print_tree_entry
4931                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4932                 print '<td class="list">';
4933                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4934                                              file_name=>$up)},
4935                               "..");
4936                 print "</td>\n";
4937                 print "<td class=\"link\"></td>\n";
4938
4939                 print "</tr>\n";
4940         }
4941         foreach my $line (@entries) {
4942                 my %t = parse_ls_tree_line($line, -z => 1);
4943
4944                 if ($alternate) {
4945                         print "<tr class=\"dark\">\n";
4946                 } else {
4947                         print "<tr class=\"light\">\n";
4948                 }
4949                 $alternate ^= 1;
4950
4951                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4952
4953                 print "</tr>\n";
4954         }
4955         print "</table>\n" .
4956               "</div>";
4957         git_footer_html();
4958 }
4959
4960 sub git_snapshot {
4961         my $format = $input_params{'snapshot_format'};
4962         if (!@snapshot_fmts) {
4963                 die_error(403, "Snapshots not allowed");
4964         }
4965         # default to first supported snapshot format
4966         $format ||= $snapshot_fmts[0];
4967         if ($format !~ m/^[a-z0-9]+$/) {
4968                 die_error(400, "Invalid snapshot format parameter");
4969         } elsif (!exists($known_snapshot_formats{$format})) {
4970                 die_error(400, "Unknown snapshot format");
4971         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
4972                 die_error(403, "Unsupported snapshot format");
4973         }
4974
4975         if (!defined $hash) {
4976                 $hash = git_get_head_hash($project);
4977         }
4978
4979         my $name = $project;
4980         $name =~ s,([^/])/*\.git$,$1,;
4981         $name = basename($name);
4982         my $filename = to_utf8($name);
4983         $name =~ s/\047/\047\\\047\047/g;
4984         my $cmd;
4985         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
4986         $cmd = quote_command(
4987                 git_cmd(), 'archive',
4988                 "--format=$known_snapshot_formats{$format}{'format'}",
4989                 "--prefix=$name/", $hash);
4990         if (exists $known_snapshot_formats{$format}{'compressor'}) {
4991                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
4992         }
4993
4994         print $cgi->header(
4995                 -type => $known_snapshot_formats{$format}{'type'},
4996                 -content_disposition => 'inline; filename="' . "$filename" . '"',
4997                 -status => '200 OK');
4998
4999         open my $fd, "-|", $cmd
5000                 or die_error(500, "Execute git-archive failed");
5001         binmode STDOUT, ':raw';
5002         print <$fd>;
5003         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5004         close $fd;
5005 }
5006
5007 sub git_log {
5008         my $head = git_get_head_hash($project);
5009         if (!defined $hash) {
5010                 $hash = $head;
5011         }
5012         if (!defined $page) {
5013                 $page = 0;
5014         }
5015         my $refs = git_get_references();
5016
5017         my @commitlist = parse_commits($hash, 101, (100 * $page));
5018
5019         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
5020
5021         my ($patch_max) = gitweb_get_feature('patches');
5022         if ($patch_max) {
5023                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5024                         $paging_nav .= " &sdot; " .
5025                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5026                                         "patches");
5027                 }
5028         }
5029
5030         git_header_html();
5031         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5032
5033         if (!@commitlist) {
5034                 my %co = parse_commit($hash);
5035
5036                 git_print_header_div('summary', $project);
5037                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5038         }
5039         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5040         for (my $i = 0; $i <= $to; $i++) {
5041                 my %co = %{$commitlist[$i]};
5042                 next if !%co;
5043                 my $commit = $co{'id'};
5044                 my $ref = format_ref_marker($refs, $commit);
5045                 my %ad = parse_date($co{'author_epoch'});
5046                 git_print_header_div('commit',
5047                                "<span class=\"age\">$co{'age_string'}</span>" .
5048                                esc_html($co{'title'}) . $ref,
5049                                $commit);
5050                 print "<div class=\"title_text\">\n" .
5051                       "<div class=\"log_link\">\n" .
5052                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5053                       " | " .
5054                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5055                       " | " .
5056                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5057                       "<br/>\n" .
5058                       "</div>\n" .
5059                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
5060                       "</div>\n";
5061
5062                 print "<div class=\"log_body\">\n";
5063                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5064                 print "</div>\n";
5065         }
5066         if ($#commitlist >= 100) {
5067                 print "<div class=\"page_nav\">\n";
5068                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5069                                -accesskey => "n", -title => "Alt-n"}, "next");
5070                 print "</div>\n";
5071         }
5072         git_footer_html();
5073 }
5074
5075 sub git_commit {
5076         $hash ||= $hash_base || "HEAD";
5077         my %co = parse_commit($hash)
5078             or die_error(404, "Unknown commit object");
5079         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5080         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
5081
5082         my $parent  = $co{'parent'};
5083         my $parents = $co{'parents'}; # listref
5084
5085         # we need to prepare $formats_nav before any parameter munging
5086         my $formats_nav;
5087         if (!defined $parent) {
5088                 # --root commitdiff
5089                 $formats_nav .= '(initial)';
5090         } elsif (@$parents == 1) {
5091                 # single parent commit
5092                 $formats_nav .=
5093                         '(parent: ' .
5094                         $cgi->a({-href => href(action=>"commit",
5095                                                hash=>$parent)},
5096                                 esc_html(substr($parent, 0, 7))) .
5097                         ')';
5098         } else {
5099                 # merge commit
5100                 $formats_nav .=
5101                         '(merge: ' .
5102                         join(' ', map {
5103                                 $cgi->a({-href => href(action=>"commit",
5104                                                        hash=>$_)},
5105                                         esc_html(substr($_, 0, 7)));
5106                         } @$parents ) .
5107                         ')';
5108         }
5109         if (gitweb_check_feature('patches')) {
5110                 $formats_nav .= " | " .
5111                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5112                                 "patch");
5113         }
5114
5115         if (!defined $parent) {
5116                 $parent = "--root";
5117         }
5118         my @difftree;
5119         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5120                 @diff_opts,
5121                 (@$parents <= 1 ? $parent : '-c'),
5122                 $hash, "--"
5123                 or die_error(500, "Open git-diff-tree failed");
5124         @difftree = map { chomp; $_ } <$fd>;
5125         close $fd or die_error(404, "Reading git-diff-tree failed");
5126
5127         # non-textual hash id's can be cached
5128         my $expires;
5129         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5130                 $expires = "+1d";
5131         }
5132         my $refs = git_get_references();
5133         my $ref = format_ref_marker($refs, $co{'id'});
5134
5135         git_header_html(undef, $expires);
5136         git_print_page_nav('commit', '',
5137                            $hash, $co{'tree'}, $hash,
5138                            $formats_nav);
5139
5140         if (defined $co{'parent'}) {
5141                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5142         } else {
5143                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5144         }
5145         print "<div class=\"title_text\">\n" .
5146               "<table class=\"object_header\">\n";
5147         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
5148               "<tr>" .
5149               "<td></td><td> $ad{'rfc2822'}";
5150         if ($ad{'hour_local'} < 6) {
5151                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
5152                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5153         } else {
5154                 printf(" (%02d:%02d %s)",
5155                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5156         }
5157         print "</td>" .
5158               "</tr>\n";
5159         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
5160         print "<tr><td></td><td> $cd{'rfc2822'}" .
5161               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
5162               "</td></tr>\n";
5163         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5164         print "<tr>" .
5165               "<td>tree</td>" .
5166               "<td class=\"sha1\">" .
5167               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5168                        class => "list"}, $co{'tree'}) .
5169               "</td>" .
5170               "<td class=\"link\">" .
5171               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5172                       "tree");
5173         my $snapshot_links = format_snapshot_links($hash);
5174         if (defined $snapshot_links) {
5175                 print " | " . $snapshot_links;
5176         }
5177         print "</td>" .
5178               "</tr>\n";
5179
5180         foreach my $par (@$parents) {
5181                 print "<tr>" .
5182                       "<td>parent</td>" .
5183                       "<td class=\"sha1\">" .
5184                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5185                                class => "list"}, $par) .
5186                       "</td>" .
5187                       "<td class=\"link\">" .
5188                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5189                       " | " .
5190                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5191                       "</td>" .
5192                       "</tr>\n";
5193         }
5194         print "</table>".
5195               "</div>\n";
5196
5197         print "<div class=\"page_body\">\n";
5198         git_print_log($co{'comment'});
5199         print "</div>\n";
5200
5201         git_difftree_body(\@difftree, $hash, @$parents);
5202
5203         git_footer_html();
5204 }
5205
5206 sub git_object {
5207         # object is defined by:
5208         # - hash or hash_base alone
5209         # - hash_base and file_name
5210         my $type;
5211
5212         # - hash or hash_base alone
5213         if ($hash || ($hash_base && !defined $file_name)) {
5214                 my $object_id = $hash || $hash_base;
5215
5216                 open my $fd, "-|", quote_command(
5217                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5218                         or die_error(404, "Object does not exist");
5219                 $type = <$fd>;
5220                 chomp $type;
5221                 close $fd
5222                         or die_error(404, "Object does not exist");
5223
5224         # - hash_base and file_name
5225         } elsif ($hash_base && defined $file_name) {
5226                 $file_name =~ s,/+$,,;
5227
5228                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5229                         or die_error(404, "Base object does not exist");
5230
5231                 # here errors should not hapen
5232                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5233                         or die_error(500, "Open git-ls-tree failed");
5234                 my $line = <$fd>;
5235                 close $fd;
5236
5237                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5238                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5239                         die_error(404, "File or directory for given base does not exist");
5240                 }
5241                 $type = $2;
5242                 $hash = $3;
5243         } else {
5244                 die_error(400, "Not enough information to find object");
5245         }
5246
5247         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5248                                           hash=>$hash, hash_base=>$hash_base,
5249                                           file_name=>$file_name),
5250                              -status => '302 Found');
5251 }
5252
5253 sub git_blobdiff {
5254         my $format = shift || 'html';
5255
5256         my $fd;
5257         my @difftree;
5258         my %diffinfo;
5259         my $expires;
5260
5261         # preparing $fd and %diffinfo for git_patchset_body
5262         # new style URI
5263         if (defined $hash_base && defined $hash_parent_base) {
5264                 if (defined $file_name) {
5265                         # read raw output
5266                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5267                                 $hash_parent_base, $hash_base,
5268                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5269                                 or die_error(500, "Open git-diff-tree failed");
5270                         @difftree = map { chomp; $_ } <$fd>;
5271                         close $fd
5272                                 or die_error(404, "Reading git-diff-tree failed");
5273                         @difftree
5274                                 or die_error(404, "Blob diff not found");
5275
5276                 } elsif (defined $hash &&
5277                          $hash =~ /[0-9a-fA-F]{40}/) {
5278                         # try to find filename from $hash
5279
5280                         # read filtered raw output
5281                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5282                                 $hash_parent_base, $hash_base, "--"
5283                                 or die_error(500, "Open git-diff-tree failed");
5284                         @difftree =
5285                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5286                                 # $hash == to_id
5287                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5288                                 map { chomp; $_ } <$fd>;
5289                         close $fd
5290                                 or die_error(404, "Reading git-diff-tree failed");
5291                         @difftree
5292                                 or die_error(404, "Blob diff not found");
5293
5294                 } else {
5295                         die_error(400, "Missing one of the blob diff parameters");
5296                 }
5297
5298                 if (@difftree > 1) {
5299                         die_error(400, "Ambiguous blob diff specification");
5300                 }
5301
5302                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5303                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5304                 $file_name   ||= $diffinfo{'to_file'};
5305
5306                 $hash_parent ||= $diffinfo{'from_id'};
5307                 $hash        ||= $diffinfo{'to_id'};
5308
5309                 # non-textual hash id's can be cached
5310                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5311                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5312                         $expires = '+1d';
5313                 }
5314
5315                 # open patch output
5316                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5317                         '-p', ($format eq 'html' ? "--full-index" : ()),
5318                         $hash_parent_base, $hash_base,
5319                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5320                         or die_error(500, "Open git-diff-tree failed");
5321         }
5322
5323         # old/legacy style URI -- not generated anymore since 1.4.3.
5324         if (!%diffinfo) {
5325                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5326         }
5327
5328         # header
5329         if ($format eq 'html') {
5330                 my $formats_nav =
5331                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5332                                 "raw");
5333                 git_header_html(undef, $expires);
5334                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5335                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5336                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5337                 } else {
5338                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5339                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5340                 }
5341                 if (defined $file_name) {
5342                         git_print_page_path($file_name, "blob", $hash_base);
5343                 } else {
5344                         print "<div class=\"page_path\"></div>\n";
5345                 }
5346
5347         } elsif ($format eq 'plain') {
5348                 print $cgi->header(
5349                         -type => 'text/plain',
5350                         -charset => 'utf-8',
5351                         -expires => $expires,
5352                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5353
5354                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5355
5356         } else {
5357                 die_error(400, "Unknown blobdiff format");
5358         }
5359
5360         # patch
5361         if ($format eq 'html') {
5362                 print "<div class=\"page_body\">\n";
5363
5364                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5365                 close $fd;
5366
5367                 print "</div>\n"; # class="page_body"
5368                 git_footer_html();
5369
5370         } else {
5371                 while (my $line = <$fd>) {
5372                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5373                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5374
5375                         print $line;
5376
5377                         last if $line =~ m!^\+\+\+!;
5378                 }
5379                 local $/ = undef;
5380                 print <$fd>;
5381                 close $fd;
5382         }
5383 }
5384
5385 sub git_blobdiff_plain {
5386         git_blobdiff('plain');
5387 }
5388
5389 sub git_commitdiff {
5390         my %params = @_;
5391         my $format = $params{-format} || 'html';
5392
5393         my ($patch_max) = gitweb_get_feature('patches');
5394         if ($format eq 'patch') {
5395                 die_error(403, "Patch view not allowed") unless $patch_max;
5396         }
5397
5398         $hash ||= $hash_base || "HEAD";
5399         my %co = parse_commit($hash)
5400             or die_error(404, "Unknown commit object");
5401
5402         # choose format for commitdiff for merge
5403         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5404                 $hash_parent = '--cc';
5405         }
5406         # we need to prepare $formats_nav before almost any parameter munging
5407         my $formats_nav;
5408         if ($format eq 'html') {
5409                 $formats_nav =
5410                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5411                                 "raw");
5412                 if ($patch_max) {
5413                         $formats_nav .= " | " .
5414                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5415                                         "patch");
5416                 }
5417
5418                 if (defined $hash_parent &&
5419                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5420                         # commitdiff with two commits given
5421                         my $hash_parent_short = $hash_parent;
5422                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5423                                 $hash_parent_short = substr($hash_parent, 0, 7);
5424                         }
5425                         $formats_nav .=
5426                                 ' (from';
5427                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5428                                 if ($co{'parents'}[$i] eq $hash_parent) {
5429                                         $formats_nav .= ' parent ' . ($i+1);
5430                                         last;
5431                                 }
5432                         }
5433                         $formats_nav .= ': ' .
5434                                 $cgi->a({-href => href(action=>"commitdiff",
5435                                                        hash=>$hash_parent)},
5436                                         esc_html($hash_parent_short)) .
5437                                 ')';
5438                 } elsif (!$co{'parent'}) {
5439                         # --root commitdiff
5440                         $formats_nav .= ' (initial)';
5441                 } elsif (scalar @{$co{'parents'}} == 1) {
5442                         # single parent commit
5443                         $formats_nav .=
5444                                 ' (parent: ' .
5445                                 $cgi->a({-href => href(action=>"commitdiff",
5446                                                        hash=>$co{'parent'})},
5447                                         esc_html(substr($co{'parent'}, 0, 7))) .
5448                                 ')';
5449                 } else {
5450                         # merge commit
5451                         if ($hash_parent eq '--cc') {
5452                                 $formats_nav .= ' | ' .
5453                                         $cgi->a({-href => href(action=>"commitdiff",
5454                                                                hash=>$hash, hash_parent=>'-c')},
5455                                                 'combined');
5456                         } else { # $hash_parent eq '-c'
5457                                 $formats_nav .= ' | ' .
5458                                         $cgi->a({-href => href(action=>"commitdiff",
5459                                                                hash=>$hash, hash_parent=>'--cc')},
5460                                                 'compact');
5461                         }
5462                         $formats_nav .=
5463                                 ' (merge: ' .
5464                                 join(' ', map {
5465                                         $cgi->a({-href => href(action=>"commitdiff",
5466                                                                hash=>$_)},
5467                                                 esc_html(substr($_, 0, 7)));
5468                                 } @{$co{'parents'}} ) .
5469                                 ')';
5470                 }
5471         }
5472
5473         my $hash_parent_param = $hash_parent;
5474         if (!defined $hash_parent_param) {
5475                 # --cc for multiple parents, --root for parentless
5476                 $hash_parent_param =
5477                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5478         }
5479
5480         # read commitdiff
5481         my $fd;
5482         my @difftree;
5483         if ($format eq 'html') {
5484                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5485                         "--no-commit-id", "--patch-with-raw", "--full-index",
5486                         $hash_parent_param, $hash, "--"
5487                         or die_error(500, "Open git-diff-tree failed");
5488
5489                 while (my $line = <$fd>) {
5490                         chomp $line;
5491                         # empty line ends raw part of diff-tree output
5492                         last unless $line;
5493                         push @difftree, scalar parse_difftree_raw_line($line);
5494                 }
5495
5496         } elsif ($format eq 'plain') {
5497                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5498                         '-p', $hash_parent_param, $hash, "--"
5499                         or die_error(500, "Open git-diff-tree failed");
5500         } elsif ($format eq 'patch') {
5501                 # For commit ranges, we limit the output to the number of
5502                 # patches specified in the 'patches' feature.
5503                 # For single commits, we limit the output to a single patch,
5504                 # diverging from the git-format-patch default.
5505                 my @commit_spec = ();
5506                 if ($hash_parent) {
5507                         if ($patch_max > 0) {
5508                                 push @commit_spec, "-$patch_max";
5509                         }
5510                         push @commit_spec, '-n', "$hash_parent..$hash";
5511                 } else {
5512                         if ($params{-single}) {
5513                                 push @commit_spec, '-1';
5514                         } else {
5515                                 if ($patch_max > 0) {
5516                                         push @commit_spec, "-$patch_max";
5517                                 }
5518                                 push @commit_spec, "-n";
5519                         }
5520                         push @commit_spec, '--root', $hash;
5521                 }
5522                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5523                         '--stdout', @commit_spec
5524                         or die_error(500, "Open git-format-patch failed");
5525         } else {
5526                 die_error(400, "Unknown commitdiff format");
5527         }
5528
5529         # non-textual hash id's can be cached
5530         my $expires;
5531         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5532                 $expires = "+1d";
5533         }
5534
5535         # write commit message
5536         if ($format eq 'html') {
5537                 my $refs = git_get_references();
5538                 my $ref = format_ref_marker($refs, $co{'id'});
5539
5540                 git_header_html(undef, $expires);
5541                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5542                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5543                 git_print_authorship(\%co);
5544                 print "<div class=\"page_body\">\n";
5545                 if (@{$co{'comment'}} > 1) {
5546                         print "<div class=\"log\">\n";
5547                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5548                         print "</div>\n"; # class="log"
5549                 }
5550
5551         } elsif ($format eq 'plain') {
5552                 my $refs = git_get_references("tags");
5553                 my $tagname = git_get_rev_name_tags($hash);
5554                 my $filename = basename($project) . "-$hash.patch";
5555
5556                 print $cgi->header(
5557                         -type => 'text/plain',
5558                         -charset => 'utf-8',
5559                         -expires => $expires,
5560                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5561                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5562                 print "From: " . to_utf8($co{'author'}) . "\n";
5563                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5564                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5565
5566                 print "X-Git-Tag: $tagname\n" if $tagname;
5567                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5568
5569                 foreach my $line (@{$co{'comment'}}) {
5570                         print to_utf8($line) . "\n";
5571                 }
5572                 print "---\n\n";
5573         } elsif ($format eq 'patch') {
5574                 my $filename = basename($project) . "-$hash.patch";
5575
5576                 print $cgi->header(
5577                         -type => 'text/plain',
5578                         -charset => 'utf-8',
5579                         -expires => $expires,
5580                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5581         }
5582
5583         # write patch
5584         if ($format eq 'html') {
5585                 my $use_parents = !defined $hash_parent ||
5586                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5587                 git_difftree_body(\@difftree, $hash,
5588                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5589                 print "<br/>\n";
5590
5591                 git_patchset_body($fd, \@difftree, $hash,
5592                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5593                 close $fd;
5594                 print "</div>\n"; # class="page_body"
5595                 git_footer_html();
5596
5597         } elsif ($format eq 'plain') {
5598                 local $/ = undef;
5599                 print <$fd>;
5600                 close $fd
5601                         or print "Reading git-diff-tree failed\n";
5602         } elsif ($format eq 'patch') {
5603                 local $/ = undef;
5604                 print <$fd>;
5605                 close $fd
5606                         or print "Reading git-format-patch failed\n";
5607         }
5608 }
5609
5610 sub git_commitdiff_plain {
5611         git_commitdiff(-format => 'plain');
5612 }
5613
5614 # format-patch-style patches
5615 sub git_patch {
5616         git_commitdiff(-format => 'patch', -single=> 1);
5617 }
5618
5619 sub git_patches {
5620         git_commitdiff(-format => 'patch');
5621 }
5622
5623 sub git_history {
5624         if (!defined $hash_base) {
5625                 $hash_base = git_get_head_hash($project);
5626         }
5627         if (!defined $page) {
5628                 $page = 0;
5629         }
5630         my $ftype;
5631         my %co = parse_commit($hash_base)
5632             or die_error(404, "Unknown commit object");
5633
5634         my $refs = git_get_references();
5635         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5636
5637         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5638                                        $file_name, "--full-history")
5639             or die_error(404, "No such file or directory on given branch");
5640
5641         if (!defined $hash && defined $file_name) {
5642                 # some commits could have deleted file in question,
5643                 # and not have it in tree, but one of them has to have it
5644                 for (my $i = 0; $i <= @commitlist; $i++) {
5645                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5646                         last if defined $hash;
5647                 }
5648         }
5649         if (defined $hash) {
5650                 $ftype = git_get_type($hash);
5651         }
5652         if (!defined $ftype) {
5653                 die_error(500, "Unknown type of object");
5654         }
5655
5656         my $paging_nav = '';
5657         if ($page > 0) {
5658                 $paging_nav .=
5659                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5660                                                file_name=>$file_name)},
5661                                 "first");
5662                 $paging_nav .= " &sdot; " .
5663                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5664                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5665         } else {
5666                 $paging_nav .= "first";
5667                 $paging_nav .= " &sdot; prev";
5668         }
5669         my $next_link = '';
5670         if ($#commitlist >= 100) {
5671                 $next_link =
5672                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5673                                  -accesskey => "n", -title => "Alt-n"}, "next");
5674                 $paging_nav .= " &sdot; $next_link";
5675         } else {
5676                 $paging_nav .= " &sdot; next";
5677         }
5678
5679         git_header_html();
5680         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5681         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5682         git_print_page_path($file_name, $ftype, $hash_base);
5683
5684         git_history_body(\@commitlist, 0, 99,
5685                          $refs, $hash_base, $ftype, $next_link);
5686
5687         git_footer_html();
5688 }
5689
5690 sub git_search {
5691         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5692         if (!defined $searchtext) {
5693                 die_error(400, "Text field is empty");
5694         }
5695         if (!defined $hash) {
5696                 $hash = git_get_head_hash($project);
5697         }
5698         my %co = parse_commit($hash);
5699         if (!%co) {
5700                 die_error(404, "Unknown commit object");
5701         }
5702         if (!defined $page) {
5703                 $page = 0;
5704         }
5705
5706         $searchtype ||= 'commit';
5707         if ($searchtype eq 'pickaxe') {
5708                 # pickaxe may take all resources of your box and run for several minutes
5709                 # with every query - so decide by yourself how public you make this feature
5710                 gitweb_check_feature('pickaxe')
5711                     or die_error(403, "Pickaxe is disabled");
5712         }
5713         if ($searchtype eq 'grep') {
5714                 gitweb_check_feature('grep')
5715                     or die_error(403, "Grep is disabled");
5716         }
5717
5718         git_header_html();
5719
5720         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5721                 my $greptype;
5722                 if ($searchtype eq 'commit') {
5723                         $greptype = "--grep=";
5724                 } elsif ($searchtype eq 'author') {
5725                         $greptype = "--author=";
5726                 } elsif ($searchtype eq 'committer') {
5727                         $greptype = "--committer=";
5728                 }
5729                 $greptype .= $searchtext;
5730                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5731                                                $greptype, '--regexp-ignore-case',
5732                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5733
5734                 my $paging_nav = '';
5735                 if ($page > 0) {
5736                         $paging_nav .=
5737                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5738                                                        searchtext=>$searchtext,
5739                                                        searchtype=>$searchtype)},
5740                                         "first");
5741                         $paging_nav .= " &sdot; " .
5742                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5743                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5744                 } else {
5745                         $paging_nav .= "first";
5746                         $paging_nav .= " &sdot; prev";
5747                 }
5748                 my $next_link = '';
5749                 if ($#commitlist >= 100) {
5750                         $next_link =
5751                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5752                                          -accesskey => "n", -title => "Alt-n"}, "next");
5753                         $paging_nav .= " &sdot; $next_link";
5754                 } else {
5755                         $paging_nav .= " &sdot; next";
5756                 }
5757
5758                 if ($#commitlist >= 100) {
5759                 }
5760
5761                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5762                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5763                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5764         }
5765
5766         if ($searchtype eq 'pickaxe') {
5767                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5768                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5769
5770                 print "<table class=\"pickaxe search\">\n";
5771                 my $alternate = 1;
5772                 $/ = "\n";
5773                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5774                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5775                         ($search_use_regexp ? '--pickaxe-regex' : ());
5776                 undef %co;
5777                 my @files;
5778                 while (my $line = <$fd>) {
5779                         chomp $line;
5780                         next unless $line;
5781
5782                         my %set = parse_difftree_raw_line($line);
5783                         if (defined $set{'commit'}) {
5784                                 # finish previous commit
5785                                 if (%co) {
5786                                         print "</td>\n" .
5787                                               "<td class=\"link\">" .
5788                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5789                                               " | " .
5790                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5791                                         print "</td>\n" .
5792                                               "</tr>\n";
5793                                 }
5794
5795                                 if ($alternate) {
5796                                         print "<tr class=\"dark\">\n";
5797                                 } else {
5798                                         print "<tr class=\"light\">\n";
5799                                 }
5800                                 $alternate ^= 1;
5801                                 %co = parse_commit($set{'commit'});
5802                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5803                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5804                                       "<td><i>$author</i></td>\n" .
5805                                       "<td>" .
5806                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5807                                               -class => "list subject"},
5808                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5809                         } elsif (defined $set{'to_id'}) {
5810                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5811
5812                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5813                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5814                                               -class => "list"},
5815                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5816                                       "<br/>\n";
5817                         }
5818                 }
5819                 close $fd;
5820
5821                 # finish last commit (warning: repetition!)
5822                 if (%co) {
5823                         print "</td>\n" .
5824                               "<td class=\"link\">" .
5825                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5826                               " | " .
5827                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5828                         print "</td>\n" .
5829                               "</tr>\n";
5830                 }
5831
5832                 print "</table>\n";
5833         }
5834
5835         if ($searchtype eq 'grep') {
5836                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5837                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5838
5839                 print "<table class=\"grep_search\">\n";
5840                 my $alternate = 1;
5841                 my $matches = 0;
5842                 $/ = "\n";
5843                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5844                         $search_use_regexp ? ('-E', '-i') : '-F',
5845                         $searchtext, $co{'tree'};
5846                 my $lastfile = '';
5847                 while (my $line = <$fd>) {
5848                         chomp $line;
5849                         my ($file, $lno, $ltext, $binary);
5850                         last if ($matches++ > 1000);
5851                         if ($line =~ /^Binary file (.+) matches$/) {
5852                                 $file = $1;
5853                                 $binary = 1;
5854                         } else {
5855                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5856                         }
5857                         if ($file ne $lastfile) {
5858                                 $lastfile and print "</td></tr>\n";
5859                                 if ($alternate++) {
5860                                         print "<tr class=\"dark\">\n";
5861                                 } else {
5862                                         print "<tr class=\"light\">\n";
5863                                 }
5864                                 print "<td class=\"list\">".
5865                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5866                                                                file_name=>"$file"),
5867                                                 -class => "list"}, esc_path($file));
5868                                 print "</td><td>\n";
5869                                 $lastfile = $file;
5870                         }
5871                         if ($binary) {
5872                                 print "<div class=\"binary\">Binary file</div>\n";
5873                         } else {
5874                                 $ltext = untabify($ltext);
5875                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5876                                         $ltext = esc_html($1, -nbsp=>1);
5877                                         $ltext .= '<span class="match">';
5878                                         $ltext .= esc_html($2, -nbsp=>1);
5879                                         $ltext .= '</span>';
5880                                         $ltext .= esc_html($3, -nbsp=>1);
5881                                 } else {
5882                                         $ltext = esc_html($ltext, -nbsp=>1);
5883                                 }
5884                                 print "<div class=\"pre\">" .
5885                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5886                                                                file_name=>"$file").'#l'.$lno,
5887                                                 -class => "linenr"}, sprintf('%4i', $lno))
5888                                         . ' ' .  $ltext . "</div>\n";
5889                         }
5890                 }
5891                 if ($lastfile) {
5892                         print "</td></tr>\n";
5893                         if ($matches > 1000) {
5894                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5895                         }
5896                 } else {
5897                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5898                 }
5899                 close $fd;
5900
5901                 print "</table>\n";
5902         }
5903         git_footer_html();
5904 }
5905
5906 sub git_search_help {
5907         git_header_html();
5908         git_print_page_nav('','', $hash,$hash,$hash);
5909         print <<EOT;
5910 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5911 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5912 the pattern entered is recognized as the POSIX extended
5913 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5914 insensitive).</p>
5915 <dl>
5916 <dt><b>commit</b></dt>
5917 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5918 EOT
5919         my $have_grep = gitweb_check_feature('grep');
5920         if ($have_grep) {
5921                 print <<EOT;
5922 <dt><b>grep</b></dt>
5923 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5924     a different one) are searched for the given pattern. On large trees, this search can take
5925 a while and put some strain on the server, so please use it with some consideration. Note that
5926 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5927 case-sensitive.</dd>
5928 EOT
5929         }
5930         print <<EOT;
5931 <dt><b>author</b></dt>
5932 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5933 <dt><b>committer</b></dt>
5934 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5935 EOT
5936         my $have_pickaxe = gitweb_check_feature('pickaxe');
5937         if ($have_pickaxe) {
5938                 print <<EOT;
5939 <dt><b>pickaxe</b></dt>
5940 <dd>All commits that caused the string to appear or disappear from any file (changes that
5941 added, removed or "modified" the string) will be listed. This search can take a while and
5942 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5943 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5944 EOT
5945         }
5946         print "</dl>\n";
5947         git_footer_html();
5948 }
5949
5950 sub git_shortlog {
5951         my $head = git_get_head_hash($project);
5952         if (!defined $hash) {
5953                 $hash = $head;
5954         }
5955         if (!defined $page) {
5956                 $page = 0;
5957         }
5958         my $refs = git_get_references();
5959
5960         my $commit_hash = $hash;
5961         if (defined $hash_parent) {
5962                 $commit_hash = "$hash_parent..$hash";
5963         }
5964         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
5965
5966         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
5967         my $next_link = '';
5968         if ($#commitlist >= 100) {
5969                 $next_link =
5970                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5971                                  -accesskey => "n", -title => "Alt-n"}, "next");
5972         }
5973         my $patch_max = gitweb_check_feature('patches');
5974         if ($patch_max) {
5975                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5976                         $paging_nav .= " &sdot; " .
5977                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5978                                         "patches");
5979                 }
5980         }
5981
5982         git_header_html();
5983         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
5984         git_print_header_div('summary', $project);
5985
5986         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
5987
5988         git_footer_html();
5989 }
5990
5991 ## ......................................................................
5992 ## feeds (RSS, Atom; OPML)
5993
5994 sub git_feed {
5995         my $format = shift || 'atom';
5996         my $have_blame = gitweb_check_feature('blame');
5997
5998         # Atom: http://www.atomenabled.org/developers/syndication/
5999         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6000         if ($format ne 'rss' && $format ne 'atom') {
6001                 die_error(400, "Unknown web feed format");
6002         }
6003
6004         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6005         my $head = $hash || 'HEAD';
6006         my @commitlist = parse_commits($head, 150, 0, $file_name);
6007
6008         my %latest_commit;
6009         my %latest_date;
6010         my $content_type = "application/$format+xml";
6011         if (defined $cgi->http('HTTP_ACCEPT') &&
6012                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6013                 # browser (feed reader) prefers text/xml
6014                 $content_type = 'text/xml';
6015         }
6016         if (defined($commitlist[0])) {
6017                 %latest_commit = %{$commitlist[0]};
6018                 %latest_date   = parse_date($latest_commit{'author_epoch'});
6019                 print $cgi->header(
6020                         -type => $content_type,
6021                         -charset => 'utf-8',
6022                         -last_modified => $latest_date{'rfc2822'});
6023         } else {
6024                 print $cgi->header(
6025                         -type => $content_type,
6026                         -charset => 'utf-8');
6027         }
6028
6029         # Optimization: skip generating the body if client asks only
6030         # for Last-Modified date.
6031         return if ($cgi->request_method() eq 'HEAD');
6032
6033         # header variables
6034         my $title = "$site_name - $project/$action";
6035         my $feed_type = 'log';
6036         if (defined $hash) {
6037                 $title .= " - '$hash'";
6038                 $feed_type = 'branch log';
6039                 if (defined $file_name) {
6040                         $title .= " :: $file_name";
6041                         $feed_type = 'history';
6042                 }
6043         } elsif (defined $file_name) {
6044                 $title .= " - $file_name";
6045                 $feed_type = 'history';
6046         }
6047         $title .= " $feed_type";
6048         my $descr = git_get_project_description($project);
6049         if (defined $descr) {
6050                 $descr = esc_html($descr);
6051         } else {
6052                 $descr = "$project " .
6053                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6054                          " feed";
6055         }
6056         my $owner = git_get_project_owner($project);
6057         $owner = esc_html($owner);
6058
6059         #header
6060         my $alt_url;
6061         if (defined $file_name) {
6062                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6063         } elsif (defined $hash) {
6064                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6065         } else {
6066                 $alt_url = href(-full=>1, action=>"summary");
6067         }
6068         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6069         if ($format eq 'rss') {
6070                 print <<XML;
6071 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6072 <channel>
6073 XML
6074                 print "<title>$title</title>\n" .
6075                       "<link>$alt_url</link>\n" .
6076                       "<description>$descr</description>\n" .
6077                       "<language>en</language>\n";
6078         } elsif ($format eq 'atom') {
6079                 print <<XML;
6080 <feed xmlns="http://www.w3.org/2005/Atom">
6081 XML
6082                 print "<title>$title</title>\n" .
6083                       "<subtitle>$descr</subtitle>\n" .
6084                       '<link rel="alternate" type="text/html" href="' .
6085                       $alt_url . '" />' . "\n" .
6086                       '<link rel="self" type="' . $content_type . '" href="' .
6087                       $cgi->self_url() . '" />' . "\n" .
6088                       "<id>" . href(-full=>1) . "</id>\n" .
6089                       # use project owner for feed author
6090                       "<author><name>$owner</name></author>\n";
6091                 if (defined $favicon) {
6092                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6093                 }
6094                 if (defined $logo_url) {
6095                         # not twice as wide as tall: 72 x 27 pixels
6096                         print "<logo>" . esc_url($logo) . "</logo>\n";
6097                 }
6098                 if (! %latest_date) {
6099                         # dummy date to keep the feed valid until commits trickle in:
6100                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6101                 } else {
6102                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6103                 }
6104         }
6105
6106         # contents
6107         for (my $i = 0; $i <= $#commitlist; $i++) {
6108                 my %co = %{$commitlist[$i]};
6109                 my $commit = $co{'id'};
6110                 # we read 150, we always show 30 and the ones more recent than 48 hours
6111                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6112                         last;
6113                 }
6114                 my %cd = parse_date($co{'author_epoch'});
6115
6116                 # get list of changed files
6117                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6118                         $co{'parent'} || "--root",
6119                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6120                         or next;
6121                 my @difftree = map { chomp; $_ } <$fd>;
6122                 close $fd
6123                         or next;
6124
6125                 # print element (entry, item)
6126                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6127                 if ($format eq 'rss') {
6128                         print "<item>\n" .
6129                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6130                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6131                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6132                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6133                               "<link>$co_url</link>\n" .
6134                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6135                               "<content:encoded>" .
6136                               "<![CDATA[\n";
6137                 } elsif ($format eq 'atom') {
6138                         print "<entry>\n" .
6139                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6140                               "<updated>$cd{'iso-8601'}</updated>\n" .
6141                               "<author>\n" .
6142                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6143                         if ($co{'author_email'}) {
6144                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6145                         }
6146                         print "</author>\n" .
6147                               # use committer for contributor
6148                               "<contributor>\n" .
6149                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6150                         if ($co{'committer_email'}) {
6151                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6152                         }
6153                         print "</contributor>\n" .
6154                               "<published>$cd{'iso-8601'}</published>\n" .
6155                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6156                               "<id>$co_url</id>\n" .
6157                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6158                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6159                 }
6160                 my $comment = $co{'comment'};
6161                 print "<pre>\n";
6162                 foreach my $line (@$comment) {
6163                         $line = esc_html($line);
6164                         print "$line\n";
6165                 }
6166                 print "</pre><ul>\n";
6167                 foreach my $difftree_line (@difftree) {
6168                         my %difftree = parse_difftree_raw_line($difftree_line);
6169                         next if !$difftree{'from_id'};
6170
6171                         my $file = $difftree{'file'} || $difftree{'to_file'};
6172
6173                         print "<li>" .
6174                               "[" .
6175                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6176                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6177                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6178                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6179                                       -title => "diff"}, 'D');
6180                         if ($have_blame) {
6181                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6182                                                              file_name=>$file, hash_base=>$commit),
6183                                               -title => "blame"}, 'B');
6184                         }
6185                         # if this is not a feed of a file history
6186                         if (!defined $file_name || $file_name ne $file) {
6187                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6188                                                              file_name=>$file, hash=>$commit),
6189                                               -title => "history"}, 'H');
6190                         }
6191                         $file = esc_path($file);
6192                         print "] ".
6193                               "$file</li>\n";
6194                 }
6195                 if ($format eq 'rss') {
6196                         print "</ul>]]>\n" .
6197                               "</content:encoded>\n" .
6198                               "</item>\n";
6199                 } elsif ($format eq 'atom') {
6200                         print "</ul>\n</div>\n" .
6201                               "</content>\n" .
6202                               "</entry>\n";
6203                 }
6204         }
6205
6206         # end of feed
6207         if ($format eq 'rss') {
6208                 print "</channel>\n</rss>\n";
6209         }       elsif ($format eq 'atom') {
6210                 print "</feed>\n";
6211         }
6212 }
6213
6214 sub git_rss {
6215         git_feed('rss');
6216 }
6217
6218 sub git_atom {
6219         git_feed('atom');
6220 }
6221
6222 sub git_opml {
6223         my @list = git_get_projects_list();
6224
6225         print $cgi->header(
6226                 -type => 'text/xml',
6227                 -charset => 'utf-8',
6228                 -content_disposition => 'inline; filename="opml.xml"');
6229
6230         print <<XML;
6231 <?xml version="1.0" encoding="utf-8"?>
6232 <opml version="1.0">
6233 <head>
6234   <title>$site_name OPML Export</title>
6235 </head>
6236 <body>
6237 <outline text="git RSS feeds">
6238 XML
6239
6240         foreach my $pr (@list) {
6241                 my %proj = %$pr;
6242                 my $head = git_get_head_hash($proj{'path'});
6243                 if (!defined $head) {
6244                         next;
6245                 }
6246                 $git_dir = "$projectroot/$proj{'path'}";
6247                 my %co = parse_commit($head);
6248                 if (!%co) {
6249                         next;
6250                 }
6251
6252                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6253                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6254                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6255                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6256         }
6257         print <<XML;
6258 </outline>
6259 </body>
6260 </opml>
6261 XML
6262 }