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 = $cgi->url(-absolute => 1);
  29
  30 # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  31 # needed and used only for URLs with nonempty PATH_INFO
  32 our $base_url = $my_url;
  33
  34 # When the script is used as DirectoryIndex, the URL does not contain the name
  35 # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  36 # have to do it ourselves. We make $path_info global because it's also used
  37 # later on.
  38 #
  39 # Another issue with the script being the DirectoryIndex is that the resulting
  40 # $my_url data is not the full script URL: this is good, because we want
  41 # generated links to keep implying the script name if it wasn't explicitly
  42 # indicated in the URL we're handling, but it means that $my_url cannot be used
  43 # as base URL.
  44 # Therefore, if we needed to strip PATH_INFO, then we know that we have
  45 # to build the base URL ourselves:
  46 our $path_info = $ENV{"PATH_INFO"};
  47 if ($path_info) {
  48         if ($my_url =~ s,\Q$path_info\E$,, &&
  49             $my_uri =~ s,\Q$path_info\E$,, &&
  50             defined $ENV{'SCRIPT_NAME'}) {
  51                 $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  52         }
  53 }
  54
  55 # core git executable to use
  56 # this can just be "git" if your webserver has a sensible PATH
  57 our $GIT = "++GIT_BINDIR++/git";
  58
  59 # absolute fs-path which will be prepended to the project path
  60 #our $projectroot = "/pub/scm";
  61 our $projectroot = "++GITWEB_PROJECTROOT++";
  62
  63 # fs traversing limit for getting project list
  64 # the number is relative to the projectroot
  65 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  66
  67 # target of the home link on top of all pages
  68 our $home_link = $my_uri || "/";
  69
  70 # string of the home link on top of all pages
  71 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  72
  73 # name of your site or organization to appear in page titles
  74 # replace this with something more descriptive for clearer bookmarks
  75 our $site_name = "++GITWEB_SITENAME++"
  76                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  77
  78 # filename of html text to include at top of each page
  79 our $site_header = "++GITWEB_SITE_HEADER++";
  80 # html text to include at home page
  81 our $home_text = "++GITWEB_HOMETEXT++";
  82 # filename of html text to include at bottom of each page
  83 our $site_footer = "++GITWEB_SITE_FOOTER++";
  84
  85 # URI of stylesheets
  86 our @stylesheets = ("++GITWEB_CSS++");
  87 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  88 our $stylesheet = undef;
  89 # URI of GIT logo (72x27 size)
  90 our $logo = "++GITWEB_LOGO++";
  91 # URI of GIT favicon, assumed to be image/png type
  92 our $favicon = "++GITWEB_FAVICON++";
  93
  94 # URI and label (title) of GIT logo link
  95 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  96 #our $logo_label = "git documentation";
  97 our $logo_url = "http://git.or.cz/";
  98 our $logo_label = "git homepage";
  99
 100 # source of projects list
 101 our $projects_list = "++GITWEB_LIST++";
 102
 103 # the width (in characters) of the projects list "Description" column
 104 our $projects_list_description_width = 25;
 105
 106 # default order of projects list
 107 # valid values are none, project, descr, owner, and age
 108 our $default_projects_order = "project";
 109
 110 # show repository only if this file exists
 111 # (only effective if this variable evaluates to true)
 112 our $export_ok = "++GITWEB_EXPORT_OK++";
 113
 114 # show repository only if this subroutine returns true
 115 # when given the path to the project, for example:
 116 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 117 our $export_auth_hook = undef;
 118
 119 # only allow viewing of repositories also shown on the overview page
 120 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 121
 122 # list of git base URLs used for URL to where fetch project from,
 123 # i.e. full URL is "$git_base_url/$project"
 124 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 125
 126 # default blob_plain mimetype and default charset for text/plain blob
 127 our $default_blob_plain_mimetype = 'text/plain';
 128 our $default_text_plain_charset  = undef;
 129
 130 # file to use for guessing MIME types before trying /etc/mime.types
 131 # (relative to the current git repository)
 132 our $mimetypes_file = undef;
 133
 134 # assume this charset if line contains non-UTF-8 characters;
 135 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 136 # for which encoding all byte sequences are valid, for example
 137 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 138 # could be even 'utf-8' for the old behavior)
 139 our $fallback_encoding = 'latin1';
 140
 141 # rename detection options for git-diff and git-diff-tree
 142 # - default is '-M', with the cost proportional to
 143 #   (number of removed files) * (number of new files).
 144 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 145 #   (number of changed files + number of removed files) * (number of new files)
 146 # - even more costly is '-C', '--find-copies-harder' with cost
 147 #   (number of files in the original tree) * (number of new files)
 148 # - one might want to include '-B' option, e.g. '-B', '-M'
 149 our @diff_opts = ('-M'); # taken from git_commit
 150
 151 # Disables features that would allow repository owners to inject script into
 152 # the gitweb domain.
 153 our $prevent_xss = 0;
 154
 155 # information about snapshot formats that gitweb is capable of serving
 156 our %known_snapshot_formats = (
 157         # name => {
 158         #       'display' => display name,
 159         #       'type' => mime type,
 160         #       'suffix' => filename suffix,
 161         #       'format' => --format for git-archive,
 162         #       'compressor' => [compressor command and arguments]
 163         #                       (array reference, optional)}
 164         #
 165         'tgz' => {
 166                 'display' => 'tar.gz',
 167                 'type' => 'application/x-gzip',
 168                 'suffix' => '.tar.gz',
 169                 'format' => 'tar',
 170                 'compressor' => ['gzip']},
 171
 172         'tbz2' => {
 173                 'display' => 'tar.bz2',
 174                 'type' => 'application/x-bzip2',
 175                 'suffix' => '.tar.bz2',
 176                 'format' => 'tar',
 177                 'compressor' => ['bzip2']},
 178
 179         'zip' => {
 180                 'display' => 'zip',
 181                 'type' => 'application/x-zip',
 182                 'suffix' => '.zip',
 183                 'format' => 'zip'},
 184 );
 185
 186 # Aliases so we understand old gitweb.snapshot values in repository
 187 # configuration.
 188 our %known_snapshot_format_aliases = (
 189         'gzip'  => 'tgz',
 190         'bzip2' => 'tbz2',
 191
 192         # backward compatibility: legacy gitweb config support
 193         'x-gzip' => undef, 'gz' => undef,
 194         'x-bzip2' => undef, 'bz2' => undef,
 195         'x-zip' => undef, '' => undef,
 196 );
 197
 198 # You define site-wide feature defaults here; override them with
 199 # $GITWEB_CONFIG as necessary.
 200 our %feature = (
 201         # feature => {
 202         #       'sub' => feature-sub (subroutine),
 203         #       'override' => allow-override (boolean),
 204         #       'default' => [ default options...] (array reference)}
 205         #
 206         # if feature is overridable (it means that allow-override has true value),
 207         # then feature-sub will be called with default options as parameters;
 208         # return value of feature-sub indicates if to enable specified feature
 209         #
 210         # if there is no 'sub' key (no feature-sub), then feature cannot be
 211         # overriden
 212         #
 213         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 214         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 215         # is enabled
 216
 217         # Enable the 'blame' blob view, showing the last commit that modified
 218         # each line in the file. This can be very CPU-intensive.
 219
 220         # To enable system wide have in $GITWEB_CONFIG
 221         # $feature{'blame'}{'default'} = [1];
 222         # To have project specific config enable override in $GITWEB_CONFIG
 223         # $feature{'blame'}{'override'} = 1;
 224         # and in project config gitweb.blame = 0|1;
 225         'blame' => {
 226                 'sub' => sub { feature_bool('blame', @_) },
 227                 'override' => 0,
 228                 'default' => [0]},
 229
 230         # Enable the 'snapshot' link, providing a compressed archive of any
 231         # tree. This can potentially generate high traffic if you have large
 232         # project.
 233
 234         # Value is a list of formats defined in %known_snapshot_formats that
 235         # you wish to offer.
 236         # To disable system wide have in $GITWEB_CONFIG
 237         # $feature{'snapshot'}{'default'} = [];
 238         # To have project specific config enable override in $GITWEB_CONFIG
 239         # $feature{'snapshot'}{'override'} = 1;
 240         # and in project config, a comma-separated list of formats or "none"
 241         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 242         'snapshot' => {
 243                 'sub' => \&feature_snapshot,
 244                 'override' => 0,
 245                 'default' => ['tgz']},
 246
 247         # Enable text search, which will list the commits which match author,
 248         # committer or commit text to a given string.  Enabled by default.
 249         # Project specific override is not supported.
 250         'search' => {
 251                 'override' => 0,
 252                 'default' => [1]},
 253
 254         # Enable grep search, which will list the files in currently selected
 255         # tree containing the given string. Enabled by default. This can be
 256         # potentially CPU-intensive, of course.
 257
 258         # To enable system wide have in $GITWEB_CONFIG
 259         # $feature{'grep'}{'default'} = [1];
 260         # To have project specific config enable override in $GITWEB_CONFIG
 261         # $feature{'grep'}{'override'} = 1;
 262         # and in project config gitweb.grep = 0|1;
 263         'grep' => {
 264                 'sub' => sub { feature_bool('grep', @_) },
 265                 'override' => 0,
 266                 'default' => [1]},
 267
 268         # Enable the pickaxe search, which will list the commits that modified
 269         # a given string in a file. This can be practical and quite faster
 270         # alternative to 'blame', but still potentially CPU-intensive.
 271
 272         # To enable system wide have in $GITWEB_CONFIG
 273         # $feature{'pickaxe'}{'default'} = [1];
 274         # To have project specific config enable override in $GITWEB_CONFIG
 275         # $feature{'pickaxe'}{'override'} = 1;
 276         # and in project config gitweb.pickaxe = 0|1;
 277         'pickaxe' => {
 278                 'sub' => sub { feature_bool('pickaxe', @_) },
 279                 'override' => 0,
 280                 'default' => [1]},
 281
 282         # Make gitweb use an alternative format of the URLs which can be
 283         # more readable and natural-looking: project name is embedded
 284         # directly in the path and the query string contains other
 285         # auxiliary information. All gitweb installations recognize
 286         # URL in either format; this configures in which formats gitweb
 287         # generates links.
 288
 289         # To enable system wide have in $GITWEB_CONFIG
 290         # $feature{'pathinfo'}{'default'} = [1];
 291         # Project specific override is not supported.
 292
 293         # Note that you will need to change the default location of CSS,
 294         # favicon, logo and possibly other files to an absolute URL. Also,
 295         # if gitweb.cgi serves as your indexfile, you will need to force
 296         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 297         'pathinfo' => {
 298                 'override' => 0,
 299                 'default' => [0]},
 300
 301         # Make gitweb consider projects in project root subdirectories
 302         # to be forks of existing projects. Given project $projname.git,
 303         # projects matching $projname/*.git will not be shown in the main
 304         # projects list, instead a '+' mark will be added to $projname
 305         # there and a 'forks' view will be enabled for the project, listing
 306         # all the forks. If project list is taken from a file, forks have
 307         # to be listed after the main project.
 308
 309         # To enable system wide have in $GITWEB_CONFIG
 310         # $feature{'forks'}{'default'} = [1];
 311         # Project specific override is not supported.
 312         'forks' => {
 313                 'override' => 0,
 314                 'default' => [0]},
 315
 316         # Insert custom links to the action bar of all project pages.
 317         # This enables you mainly to link to third-party scripts integrating
 318         # into gitweb; e.g. git-browser for graphical history representation
 319         # or custom web-based repository administration interface.
 320
 321         # The 'default' value consists of a list of triplets in the form
 322         # (label, link, position) where position is the label after which
 323         # to insert the link and link is a format string where %n expands
 324         # to the project name, %f to the project path within the filesystem,
 325         # %h to the current hash (h gitweb parameter) and %b to the current
 326         # hash base (hb gitweb parameter); %% expands to %.
 327
 328         # To enable system wide have in $GITWEB_CONFIG e.g.
 329         # $feature{'actions'}{'default'} = [('graphiclog',
 330         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 331         # Project specific override is not supported.
 332         'actions' => {
 333                 'override' => 0,
 334                 'default' => []},
 335
 336         # Allow gitweb scan project content tags described in ctags/
 337         # of project repository, and display the popular Web 2.0-ish
 338         # "tag cloud" near the project list. Note that this is something
 339         # COMPLETELY different from the normal Git tags.
 340
 341         # gitweb by itself can show existing tags, but it does not handle
 342         # tagging itself; you need an external application for that.
 343         # For an example script, check Girocco's cgi/tagproj.cgi.
 344         # You may want to install the HTML::TagCloud Perl module to get
 345         # a pretty tag cloud instead of just a list of tags.
 346
 347         # To enable system wide have in $GITWEB_CONFIG
 348         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 349         # Project specific override is not supported.
 350         'ctags' => {
 351                 'override' => 0,
 352                 'default' => [0]},
 353
 354         # The maximum number of patches in a patchset generated in patch
 355         # view. Set this to 0 or undef to disable patch view, or to a
 356         # negative number to remove any limit.
 357
 358         # To disable system wide have in $GITWEB_CONFIG
 359         # $feature{'patches'}{'default'} = [0];
 360         # To have project specific config enable override in $GITWEB_CONFIG
 361         # $feature{'patches'}{'override'} = 1;
 362         # and in project config gitweb.patches = 0|n;
 363         # where n is the maximum number of patches allowed in a patchset.
 364         'patches' => {
 365                 'sub' => \&feature_patches,
 366                 'override' => 0,
 367                 'default' => [16]},
 368 );
 369
 370 sub gitweb_get_feature {
 371         my ($name) = @_;
 372         return unless exists $feature{$name};
 373         my ($sub, $override, @defaults) = (
 374                 $feature{$name}{'sub'},
 375                 $feature{$name}{'override'},
 376                 @{$feature{$name}{'default'}});
 377         if (!$override) { return @defaults; }
 378         if (!defined $sub) {
 379                 warn "feature $name is not overrideable";
 380                 return @defaults;
 381         }
 382         return $sub->(@defaults);
 383 }
 384
 385 # A wrapper to check if a given feature is enabled.
 386 # With this, you can say
 387 #
 388 #   my $bool_feat = gitweb_check_feature('bool_feat');
 389 #   gitweb_check_feature('bool_feat') or somecode;
 390 #
 391 # instead of
 392 #
 393 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 394 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 395 #
 396 sub gitweb_check_feature {
 397         return (gitweb_get_feature(@_))[0];
 398 }
 399
 400
 401 sub feature_bool {
 402         my $key = shift;
 403         my ($val) = git_get_project_config($key, '--bool');
 404
 405         if (!defined $val) {
 406                 return ($_[0]);
 407         } elsif ($val eq 'true') {
 408                 return (1);
 409         } elsif ($val eq 'false') {
 410                 return (0);
 411         }
 412 }
 413
 414 sub feature_snapshot {
 415         my (@fmts) = @_;
 416
 417         my ($val) = git_get_project_config('snapshot');
 418
 419         if ($val) {
 420                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 421         }
 422
 423         return @fmts;
 424 }
 425
 426 sub feature_patches {
 427         my @val = (git_get_project_config('patches', '--int'));
 428
 429         if (@val) {
 430                 return @val;
 431         }
 432
 433         return ($_[0]);
 434 }
 435
 436 # checking HEAD file with -e is fragile if the repository was
 437 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 438 # and then pruned.
 439 sub check_head_link {
 440         my ($dir) = @_;
 441         my $headfile = "$dir/HEAD";
 442         return ((-e $headfile) ||
 443                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 444 }
 445
 446 sub check_export_ok {
 447         my ($dir) = @_;
 448         return (check_head_link($dir) &&
 449                 (!$export_ok || -e "$dir/$export_ok") &&
 450                 (!$export_auth_hook || $export_auth_hook->($dir)));
 451 }
 452
 453 # process alternate names for backward compatibility
 454 # filter out unsupported (unknown) snapshot formats
 455 sub filter_snapshot_fmts {
 456         my @fmts = @_;
 457
 458         @fmts = map {
 459                 exists $known_snapshot_format_aliases{$_} ?
 460                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 461         @fmts = grep {
 462                 exists $known_snapshot_formats{$_} } @fmts;
 463 }
 464
 465 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 466 if (-e $GITWEB_CONFIG) {
 467         do $GITWEB_CONFIG;
 468 } else {
 469         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 470         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 471 }
 472
 473 # version of the core git binary
 474 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 475
 476 $projects_list ||= $projectroot;
 477
 478 # ======================================================================
 479 # input validation and dispatch
 480
 481 # input parameters can be collected from a variety of sources (presently, CGI
 482 # and PATH_INFO), so we define an %input_params hash that collects them all
 483 # together during validation: this allows subsequent uses (e.g. href()) to be
 484 # agnostic of the parameter origin
 485
 486 our %input_params = ();
 487
 488 # input parameters are stored with the long parameter name as key. This will
 489 # also be used in the href subroutine to convert parameters to their CGI
 490 # equivalent, and since the href() usage is the most frequent one, we store
 491 # the name -> CGI key mapping here, instead of the reverse.
 492 #
 493 # XXX: Warning: If you touch this, check the search form for updating,
 494 # too.
 495
 496 our @cgi_param_mapping = (
 497         project => "p",
 498         action => "a",
 499         file_name => "f",
 500         file_parent => "fp",
 501         hash => "h",
 502         hash_parent => "hp",
 503         hash_base => "hb",
 504         hash_parent_base => "hpb",
 505         page => "pg",
 506         order => "o",
 507         searchtext => "s",
 508         searchtype => "st",
 509         snapshot_format => "sf",
 510         extra_options => "opt",
 511         search_use_regexp => "sr",
 512 );
 513 our %cgi_param_mapping = @cgi_param_mapping;
 514
 515 # we will also need to know the possible actions, for validation
 516 our %actions = (
 517         "blame" => \&git_blame,
 518         "blobdiff" => \&git_blobdiff,
 519         "blobdiff_plain" => \&git_blobdiff_plain,
 520         "blob" => \&git_blob,
 521         "blob_plain" => \&git_blob_plain,
 522         "commitdiff" => \&git_commitdiff,
 523         "commitdiff_plain" => \&git_commitdiff_plain,
 524         "commit" => \&git_commit,
 525         "forks" => \&git_forks,
 526         "heads" => \&git_heads,
 527         "history" => \&git_history,
 528         "log" => \&git_log,
 529         "patch" => \&git_patch,
 530         "patches" => \&git_patches,
 531         "rss" => \&git_rss,
 532         "atom" => \&git_atom,
 533         "search" => \&git_search,
 534         "search_help" => \&git_search_help,
 535         "shortlog" => \&git_shortlog,
 536         "summary" => \&git_summary,
 537         "tag" => \&git_tag,
 538         "tags" => \&git_tags,
 539         "tree" => \&git_tree,
 540         "snapshot" => \&git_snapshot,
 541         "object" => \&git_object,
 542         # those below don't need $project
 543         "opml" => \&git_opml,
 544         "project_list" => \&git_project_list,
 545         "project_index" => \&git_project_index,
 546 );
 547
 548 # finally, we have the hash of allowed extra_options for the commands that
 549 # allow them
 550 our %allowed_options = (
 551         "--no-merges" => [ qw(rss atom log shortlog history) ],
 552 );
 553
 554 # fill %input_params with the CGI parameters. All values except for 'opt'
 555 # should be single values, but opt can be an array. We should probably
 556 # build an array of parameters that can be multi-valued, but since for the time
 557 # being it's only this one, we just single it out
 558 while (my ($name, $symbol) = each %cgi_param_mapping) {
 559         if ($symbol eq 'opt') {
 560                 $input_params{$name} = [ $cgi->param($symbol) ];
 561         } else {
 562                 $input_params{$name} = $cgi->param($symbol);
 563         }
 564 }
 565
 566 # now read PATH_INFO and update the parameter list for missing parameters
 567 sub evaluate_path_info {
 568         return if defined $input_params{'project'};
 569         return if !$path_info;
 570         $path_info =~ s,^/+,,;
 571         return if !$path_info;
 572
 573         # find which part of PATH_INFO is project
 574         my $project = $path_info;
 575         $project =~ s,/+$,,;
 576         while ($project && !check_head_link("$projectroot/$project")) {
 577                 $project =~ s,/*[^/]*$,,;
 578         }
 579         return unless $project;
 580         $input_params{'project'} = $project;
 581
 582         # do not change any parameters if an action is given using the query string
 583         return if $input_params{'action'};
 584         $path_info =~ s,^\Q$project\E/*,,;
 585
 586         # next, check if we have an action
 587         my $action = $path_info;
 588         $action =~ s,/.*$,,;
 589         if (exists $actions{$action}) {
 590                 $path_info =~ s,^$action/*,,;
 591                 $input_params{'action'} = $action;
 592         }
 593
 594         # list of actions that want hash_base instead of hash, but can have no
 595         # pathname (f) parameter
 596         my @wants_base = (
 597                 'tree',
 598                 'history',
 599         );
 600
 601         # we want to catch
 602         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 603         my ($parentrefname, $parentpathname, $refname, $pathname) =
 604                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 605
 606         # first, analyze the 'current' part
 607         if (defined $pathname) {
 608                 # we got "branch:filename" or "branch:dir/"
 609                 # we could use git_get_type(branch:pathname), but:
 610                 # - it needs $git_dir
 611                 # - it does a git() call
 612                 # - the convention of terminating directories with a slash
 613                 #   makes it superfluous
 614                 # - embedding the action in the PATH_INFO would make it even
 615                 #   more superfluous
 616                 $pathname =~ s,^/+,,;
 617                 if (!$pathname || substr($pathname, -1) eq "/") {
 618                         $input_params{'action'} ||= "tree";
 619                         $pathname =~ s,/$,,;
 620                 } else {
 621                         # the default action depends on whether we had parent info
 622                         # or not
 623                         if ($parentrefname) {
 624                                 $input_params{'action'} ||= "blobdiff_plain";
 625                         } else {
 626                                 $input_params{'action'} ||= "blob_plain";
 627                         }
 628                 }
 629                 $input_params{'hash_base'} ||= $refname;
 630                 $input_params{'file_name'} ||= $pathname;
 631         } elsif (defined $refname) {
 632                 # we got "branch". In this case we have to choose if we have to
 633                 # set hash or hash_base.
 634                 #
 635                 # Most of the actions without a pathname only want hash to be
 636                 # set, except for the ones specified in @wants_base that want
 637                 # hash_base instead. It should also be noted that hand-crafted
 638                 # links having 'history' as an action and no pathname or hash
 639                 # set will fail, but that happens regardless of PATH_INFO.
 640                 $input_params{'action'} ||= "shortlog";
 641                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 642                         $input_params{'hash_base'} ||= $refname;
 643                 } else {
 644                         $input_params{'hash'} ||= $refname;
 645                 }
 646         }
 647
 648         # next, handle the 'parent' part, if present
 649         if (defined $parentrefname) {
 650                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 651                 # someproject/blobdiff/oldrev..newrev:/filename
 652                 if ($parentpathname) {
 653                         $parentpathname =~ s,^/+,,;
 654                         $parentpathname =~ s,/$,,;
 655                         $input_params{'file_parent'} ||= $parentpathname;
 656                 } else {
 657                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 658                 }
 659                 # we assume that hash_parent_base is wanted if a path was specified,
 660                 # or if the action wants hash_base instead of hash
 661                 if (defined $input_params{'file_parent'} ||
 662                         grep { $_ eq $input_params{'action'} } @wants_base) {
 663                         $input_params{'hash_parent_base'} ||= $parentrefname;
 664                 } else {
 665                         $input_params{'hash_parent'} ||= $parentrefname;
 666                 }
 667         }
 668
 669         # for the snapshot action, we allow URLs in the form
 670         # $project/snapshot/$hash.ext
 671         # where .ext determines the snapshot and gets removed from the
 672         # passed $refname to provide the $hash.
 673         #
 674         # To be able to tell that $refname includes the format extension, we
 675         # require the following two conditions to be satisfied:
 676         # - the hash input parameter MUST have been set from the $refname part
 677         #   of the URL (i.e. they must be equal)
 678         # - the snapshot format MUST NOT have been defined already (e.g. from
 679         #   CGI parameter sf)
 680         # It's also useless to try any matching unless $refname has a dot,
 681         # so we check for that too
 682         if (defined $input_params{'action'} &&
 683                 $input_params{'action'} eq 'snapshot' &&
 684                 defined $refname && index($refname, '.') != -1 &&
 685                 $refname eq $input_params{'hash'} &&
 686                 !defined $input_params{'snapshot_format'}) {
 687                 # We loop over the known snapshot formats, checking for
 688                 # extensions. Allowed extensions are both the defined suffix
 689                 # (which includes the initial dot already) and the snapshot
 690                 # format key itself, with a prepended dot
 691                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 692                         my $hash = $refname;
 693                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 694                                 next;
 695                         }
 696                         my $sfx = $1;
 697                         # a valid suffix was found, so set the snapshot format
 698                         # and reset the hash parameter
 699                         $input_params{'snapshot_format'} = $fmt;
 700                         $input_params{'hash'} = $hash;
 701                         # we also set the format suffix to the one requested
 702                         # in the URL: this way a request for e.g. .tgz returns
 703                         # a .tgz instead of a .tar.gz
 704                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 705                         last;
 706                 }
 707         }
 708 }
 709 evaluate_path_info();
 710
 711 our $action = $input_params{'action'};
 712 if (defined $action) {
 713         if (!validate_action($action)) {
 714                 die_error(400, "Invalid action parameter");
 715         }
 716 }
 717
 718 # parameters which are pathnames
 719 our $project = $input_params{'project'};
 720 if (defined $project) {
 721         if (!validate_project($project)) {
 722                 undef $project;
 723                 die_error(404, "No such project");
 724         }
 725 }
 726
 727 our $file_name = $input_params{'file_name'};
 728 if (defined $file_name) {
 729         if (!validate_pathname($file_name)) {
 730                 die_error(400, "Invalid file parameter");
 731         }
 732 }
 733
 734 our $file_parent = $input_params{'file_parent'};
 735 if (defined $file_parent) {
 736         if (!validate_pathname($file_parent)) {
 737                 die_error(400, "Invalid file parent parameter");
 738         }
 739 }
 740
 741 # parameters which are refnames
 742 our $hash = $input_params{'hash'};
 743 if (defined $hash) {
 744         if (!validate_refname($hash)) {
 745                 die_error(400, "Invalid hash parameter");
 746         }
 747 }
 748
 749 our $hash_parent = $input_params{'hash_parent'};
 750 if (defined $hash_parent) {
 751         if (!validate_refname($hash_parent)) {
 752                 die_error(400, "Invalid hash parent parameter");
 753         }
 754 }
 755
 756 our $hash_base = $input_params{'hash_base'};
 757 if (defined $hash_base) {
 758         if (!validate_refname($hash_base)) {
 759                 die_error(400, "Invalid hash base parameter");
 760         }
 761 }
 762
 763 our @extra_options = @{$input_params{'extra_options'}};
 764 # @extra_options is always defined, since it can only be (currently) set from
 765 # CGI, and $cgi->param() returns the empty array in array context if the param
 766 # is not set
 767 foreach my $opt (@extra_options) {
 768         if (not exists $allowed_options{$opt}) {
 769                 die_error(400, "Invalid option parameter");
 770         }
 771         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 772                 die_error(400, "Invalid option parameter for this action");
 773         }
 774 }
 775
 776 our $hash_parent_base = $input_params{'hash_parent_base'};
 777 if (defined $hash_parent_base) {
 778         if (!validate_refname($hash_parent_base)) {
 779                 die_error(400, "Invalid hash parent base parameter");
 780         }
 781 }
 782
 783 # other parameters
 784 our $page = $input_params{'page'};
 785 if (defined $page) {
 786         if ($page =~ m/[^0-9]/) {
 787                 die_error(400, "Invalid page parameter");
 788         }
 789 }
 790
 791 our $searchtype = $input_params{'searchtype'};
 792 if (defined $searchtype) {
 793         if ($searchtype =~ m/[^a-z]/) {
 794                 die_error(400, "Invalid searchtype parameter");
 795         }
 796 }
 797
 798 our $search_use_regexp = $input_params{'search_use_regexp'};
 799
 800 our $searchtext = $input_params{'searchtext'};
 801 our $search_regexp;
 802 if (defined $searchtext) {
 803         if (length($searchtext) < 2) {
 804                 die_error(403, "At least two characters are required for search parameter");
 805         }
 806         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 807 }
 808
 809 # path to the current git repository
 810 our $git_dir;
 811 $git_dir = "$projectroot/$project" if $project;
 812
 813 # list of supported snapshot formats
 814 our @snapshot_fmts = gitweb_get_feature('snapshot');
 815 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 816
 817 # dispatch
 818 if (!defined $action) {
 819         if (defined $hash) {
 820                 $action = git_get_type($hash);
 821         } elsif (defined $hash_base && defined $file_name) {
 822                 $action = git_get_type("$hash_base:$file_name");
 823         } elsif (defined $project) {
 824                 $action = 'summary';
 825         } else {
 826                 $action = 'project_list';
 827         }
 828 }
 829 if (!defined($actions{$action})) {
 830         die_error(400, "Unknown action");
 831 }
 832 if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
 833     !$project) {
 834         die_error(400, "Project needed");
 835 }
 836 $actions{$action}->();
 837 exit;
 838
 839 ## ======================================================================
 840 ## action links
 841
 842 sub href {
 843         my %params = @_;
 844         # default is to use -absolute url() i.e. $my_uri
 845         my $href = $params{-full} ? $my_url : $my_uri;
 846
 847         $params{'project'} = $project unless exists $params{'project'};
 848
 849         if ($params{-replay}) {
 850                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 851                         if (!exists $params{$name}) {
 852                                 $params{$name} = $input_params{$name};
 853                         }
 854                 }
 855         }
 856
 857         my $use_pathinfo = gitweb_check_feature('pathinfo');
 858         if ($use_pathinfo and defined $params{'project'}) {
 859                 # try to put as many parameters as possible in PATH_INFO:
 860                 #   - project name
 861                 #   - action
 862                 #   - hash_parent or hash_parent_base:/file_parent
 863                 #   - hash or hash_base:/filename
 864                 #   - the snapshot_format as an appropriate suffix
 865
 866                 # When the script is the root DirectoryIndex for the domain,
 867                 # $href here would be something like http://gitweb.example.com/
 868                 # Thus, we strip any trailing / from $href, to spare us double
 869                 # slashes in the final URL
 870                 $href =~ s,/$,,;
 871
 872                 # Then add the project name, if present
 873                 $href .= "/".esc_url($params{'project'});
 874                 delete $params{'project'};
 875
 876                 # since we destructively absorb parameters, we keep this
 877                 # boolean that remembers if we're handling a snapshot
 878                 my $is_snapshot = $params{'action'} eq 'snapshot';
 879
 880                 # Summary just uses the project path URL, any other action is
 881                 # added to the URL
 882                 if (defined $params{'action'}) {
 883                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
 884                         delete $params{'action'};
 885                 }
 886
 887                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
 888                 # stripping nonexistent or useless pieces
 889                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
 890                         || $params{'hash_parent'} || $params{'hash'});
 891                 if (defined $params{'hash_base'}) {
 892                         if (defined $params{'hash_parent_base'}) {
 893                                 $href .= esc_url($params{'hash_parent_base'});
 894                                 # skip the file_parent if it's the same as the file_name
 895                                 delete $params{'file_parent'} if $params{'file_parent'} eq $params{'file_name'};
 896                                 if (defined $params{'file_parent'} && $params{'file_parent'} !~ /\.\./) {
 897                                         $href .= ":/".esc_url($params{'file_parent'});
 898                                         delete $params{'file_parent'};
 899                                 }
 900                                 $href .= "..";
 901                                 delete $params{'hash_parent'};
 902                                 delete $params{'hash_parent_base'};
 903                         } elsif (defined $params{'hash_parent'}) {
 904                                 $href .= esc_url($params{'hash_parent'}). "..";
 905                                 delete $params{'hash_parent'};
 906                         }
 907
 908                         $href .= esc_url($params{'hash_base'});
 909                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
 910                                 $href .= ":/".esc_url($params{'file_name'});
 911                                 delete $params{'file_name'};
 912                         }
 913                         delete $params{'hash'};
 914                         delete $params{'hash_base'};
 915                 } elsif (defined $params{'hash'}) {
 916                         $href .= esc_url($params{'hash'});
 917                         delete $params{'hash'};
 918                 }
 919
 920                 # If the action was a snapshot, we can absorb the
 921                 # snapshot_format parameter too
 922                 if ($is_snapshot) {
 923                         my $fmt = $params{'snapshot_format'};
 924                         # snapshot_format should always be defined when href()
 925                         # is called, but just in case some code forgets, we
 926                         # fall back to the default
 927                         $fmt ||= $snapshot_fmts[0];
 928                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
 929                         delete $params{'snapshot_format'};
 930                 }
 931         }
 932
 933         # now encode the parameters explicitly
 934         my @result = ();
 935         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
 936                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
 937                 if (defined $params{$name}) {
 938                         if (ref($params{$name}) eq "ARRAY") {
 939                                 foreach my $par (@{$params{$name}}) {
 940                                         push @result, $symbol . "=" . esc_param($par);
 941                                 }
 942                         } else {
 943                                 push @result, $symbol . "=" . esc_param($params{$name});
 944                         }
 945                 }
 946         }
 947         $href .= "?" . join(';', @result) if scalar @result;
 948
 949         return $href;
 950 }
 951
 952
 953 ## ======================================================================
 954 ## validation, quoting/unquoting and escaping
 955
 956 sub validate_action {
 957         my $input = shift || return undef;
 958         return undef unless exists $actions{$input};
 959         return $input;
 960 }
 961
 962 sub validate_project {
 963         my $input = shift || return undef;
 964         if (!validate_pathname($input) ||
 965                 !(-d "$projectroot/$input") ||
 966                 !check_export_ok("$projectroot/$input") ||
 967                 ($strict_export && !project_in_list($input))) {
 968                 return undef;
 969         } else {
 970                 return $input;
 971         }
 972 }
 973
 974 sub validate_pathname {
 975         my $input = shift || return undef;
 976
 977         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
 978         # at the beginning, at the end, and between slashes.
 979         # also this catches doubled slashes
 980         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
 981                 return undef;
 982         }
 983         # no null characters
 984         if ($input =~ m!\0!) {
 985                 return undef;
 986         }
 987         return $input;
 988 }
 989
 990 sub validate_refname {
 991         my $input = shift || return undef;
 992
 993         # textual hashes are O.K.
 994         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
 995                 return $input;
 996         }
 997         # it must be correct pathname
 998         $input = validate_pathname($input)
 999                 or return undef;
1000         # restrictions on ref name according to git-check-ref-format
1001         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1002                 return undef;
1003         }
1004         return $input;
1005 }
1006
1007 # decode sequences of octets in utf8 into Perl's internal form,
1008 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1009 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1010 sub to_utf8 {
1011         my $str = shift;
1012         if (utf8::valid($str)) {
1013                 utf8::decode($str);
1014                 return $str;
1015         } else {
1016                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1017         }
1018 }
1019
1020 # quote unsafe chars, but keep the slash, even when it's not
1021 # correct, but quoted slashes look too horrible in bookmarks
1022 sub esc_param {
1023         my $str = shift;
1024         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
1025         $str =~ s/\+/%2B/g;
1026         $str =~ s/ /\+/g;
1027         return $str;
1028 }
1029
1030 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1031 sub esc_url {
1032         my $str = shift;
1033         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1034         $str =~ s/\+/%2B/g;
1035         $str =~ s/ /\+/g;
1036         return $str;
1037 }
1038
1039 # replace invalid utf8 character with SUBSTITUTION sequence
1040 sub esc_html {
1041         my $str = shift;
1042         my %opts = @_;
1043
1044         $str = to_utf8($str);
1045         $str = $cgi->escapeHTML($str);
1046         if ($opts{'-nbsp'}) {
1047                 $str =~ s/ /&nbsp;/g;
1048         }
1049         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1050         return $str;
1051 }
1052
1053 # quote control characters and escape filename to HTML
1054 sub esc_path {
1055         my $str = shift;
1056         my %opts = @_;
1057
1058         $str = to_utf8($str);
1059         $str = $cgi->escapeHTML($str);
1060         if ($opts{'-nbsp'}) {
1061                 $str =~ s/ /&nbsp;/g;
1062         }
1063         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1064         return $str;
1065 }
1066
1067 # Make control characters "printable", using character escape codes (CEC)
1068 sub quot_cec {
1069         my $cntrl = shift;
1070         my %opts = @_;
1071         my %es = ( # character escape codes, aka escape sequences
1072                 "\t" => '\t',   # tab            (HT)
1073                 "\n" => '\n',   # line feed      (LF)
1074                 "\r" => '\r',   # carrige return (CR)
1075                 "\f" => '\f',   # form feed      (FF)
1076                 "\b" => '\b',   # backspace      (BS)
1077                 "\a" => '\a',   # alarm (bell)   (BEL)
1078                 "\e" => '\e',   # escape         (ESC)
1079                 "\013" => '\v', # vertical tab   (VT)
1080                 "\000" => '\0', # nul character  (NUL)
1081         );
1082         my $chr = ( (exists $es{$cntrl})
1083                     ? $es{$cntrl}
1084                     : sprintf('\%2x', ord($cntrl)) );
1085         if ($opts{-nohtml}) {
1086                 return $chr;
1087         } else {
1088                 return "<span class=\"cntrl\">$chr</span>";
1089         }
1090 }
1091
1092 # Alternatively use unicode control pictures codepoints,
1093 # Unicode "printable representation" (PR)
1094 sub quot_upr {
1095         my $cntrl = shift;
1096         my %opts = @_;
1097
1098         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1099         if ($opts{-nohtml}) {
1100                 return $chr;
1101         } else {
1102                 return "<span class=\"cntrl\">$chr</span>";
1103         }
1104 }
1105
1106 # git may return quoted and escaped filenames
1107 sub unquote {
1108         my $str = shift;
1109
1110         sub unq {
1111                 my $seq = shift;
1112                 my %es = ( # character escape codes, aka escape sequences
1113                         't' => "\t",   # tab            (HT, TAB)
1114                         'n' => "\n",   # newline        (NL)
1115                         'r' => "\r",   # return         (CR)
1116                         'f' => "\f",   # form feed      (FF)
1117                         'b' => "\b",   # backspace      (BS)
1118                         'a' => "\a",   # alarm (bell)   (BEL)
1119                         'e' => "\e",   # escape         (ESC)
1120                         'v' => "\013", # vertical tab   (VT)
1121                 );
1122
1123                 if ($seq =~ m/^[0-7]{1,3}$/) {
1124                         # octal char sequence
1125                         return chr(oct($seq));
1126                 } elsif (exists $es{$seq}) {
1127                         # C escape sequence, aka character escape code
1128                         return $es{$seq};
1129                 }
1130                 # quoted ordinary character
1131                 return $seq;
1132         }
1133
1134         if ($str =~ m/^"(.*)"$/) {
1135                 # needs unquoting
1136                 $str = $1;
1137                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1138         }
1139         return $str;
1140 }
1141
1142 # escape tabs (convert tabs to spaces)
1143 sub untabify {
1144         my $line = shift;
1145
1146         while ((my $pos = index($line, "\t")) != -1) {
1147                 if (my $count = (8 - ($pos % 8))) {
1148                         my $spaces = ' ' x $count;
1149                         $line =~ s/\t/$spaces/;
1150                 }
1151         }
1152
1153         return $line;
1154 }
1155
1156 sub project_in_list {
1157         my $project = shift;
1158         my @list = git_get_projects_list();
1159         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1160 }
1161
1162 ## ----------------------------------------------------------------------
1163 ## HTML aware string manipulation
1164
1165 # Try to chop given string on a word boundary between position
1166 # $len and $len+$add_len. If there is no word boundary there,
1167 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1168 # (marking chopped part) would be longer than given string.
1169 sub chop_str {
1170         my $str = shift;
1171         my $len = shift;
1172         my $add_len = shift || 10;
1173         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1174
1175         # Make sure perl knows it is utf8 encoded so we don't
1176         # cut in the middle of a utf8 multibyte char.
1177         $str = to_utf8($str);
1178
1179         # allow only $len chars, but don't cut a word if it would fit in $add_len
1180         # if it doesn't fit, cut it if it's still longer than the dots we would add
1181         # remove chopped character entities entirely
1182
1183         # when chopping in the middle, distribute $len into left and right part
1184         # return early if chopping wouldn't make string shorter
1185         if ($where eq 'center') {
1186                 return $str if ($len + 5 >= length($str)); # filler is length 5
1187                 $len = int($len/2);
1188         } else {
1189                 return $str if ($len + 4 >= length($str)); # filler is length 4
1190         }
1191
1192         # regexps: ending and beginning with word part up to $add_len
1193         my $endre = qr/.{$len}\w{0,$add_len}/;
1194         my $begre = qr/\w{0,$add_len}.{$len}/;
1195
1196         if ($where eq 'left') {
1197                 $str =~ m/^(.*?)($begre)$/;
1198                 my ($lead, $body) = ($1, $2);
1199                 if (length($lead) > 4) {
1200                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
1201                         $lead = " ...";
1202                 }
1203                 return "$lead$body";
1204
1205         } elsif ($where eq 'center') {
1206                 $str =~ m/^($endre)(.*)$/;
1207                 my ($left, $str)  = ($1, $2);
1208                 $str =~ m/^(.*?)($begre)$/;
1209                 my ($mid, $right) = ($1, $2);
1210                 if (length($mid) > 5) {
1211                         $left  =~ s/&[^;]*$//;
1212                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
1213                         $mid = " ... ";
1214                 }
1215                 return "$left$mid$right";
1216
1217         } else {
1218                 $str =~ m/^($endre)(.*)$/;
1219                 my $body = $1;
1220                 my $tail = $2;
1221                 if (length($tail) > 4) {
1222                         $body =~ s/&[^;]*$//;
1223                         $tail = "... ";
1224                 }
1225                 return "$body$tail";
1226         }
1227 }
1228
1229 # takes the same arguments as chop_str, but also wraps a <span> around the
1230 # result with a title attribute if it does get chopped. Additionally, the
1231 # string is HTML-escaped.
1232 sub chop_and_escape_str {
1233         my ($str) = @_;
1234
1235         my $chopped = chop_str(@_);
1236         if ($chopped eq $str) {
1237                 return esc_html($chopped);
1238         } else {
1239                 $str =~ s/[[:cntrl:]]/?/g;
1240                 return $cgi->span({-title=>$str}, esc_html($chopped));
1241         }
1242 }
1243
1244 ## ----------------------------------------------------------------------
1245 ## functions returning short strings
1246
1247 # CSS class for given age value (in seconds)
1248 sub age_class {
1249         my $age = shift;
1250
1251         if (!defined $age) {
1252                 return "noage";
1253         } elsif ($age < 60*60*2) {
1254                 return "age0";
1255         } elsif ($age < 60*60*24*2) {
1256                 return "age1";
1257         } else {
1258                 return "age2";
1259         }
1260 }
1261
1262 # convert age in seconds to "nn units ago" string
1263 sub age_string {
1264         my $age = shift;
1265         my $age_str;
1266
1267         if ($age > 60*60*24*365*2) {
1268                 $age_str = (int $age/60/60/24/365);
1269                 $age_str .= " years ago";
1270         } elsif ($age > 60*60*24*(365/12)*2) {
1271                 $age_str = int $age/60/60/24/(365/12);
1272                 $age_str .= " months ago";
1273         } elsif ($age > 60*60*24*7*2) {
1274                 $age_str = int $age/60/60/24/7;
1275                 $age_str .= " weeks ago";
1276         } elsif ($age > 60*60*24*2) {
1277                 $age_str = int $age/60/60/24;
1278                 $age_str .= " days ago";
1279         } elsif ($age > 60*60*2) {
1280                 $age_str = int $age/60/60;
1281                 $age_str .= " hours ago";
1282         } elsif ($age > 60*2) {
1283                 $age_str = int $age/60;
1284                 $age_str .= " min ago";
1285         } elsif ($age > 2) {
1286                 $age_str = int $age;
1287                 $age_str .= " sec ago";
1288         } else {
1289                 $age_str .= " right now";
1290         }
1291         return $age_str;
1292 }
1293
1294 use constant {
1295         S_IFINVALID => 0030000,
1296         S_IFGITLINK => 0160000,
1297 };
1298
1299 # submodule/subproject, a commit object reference
1300 sub S_ISGITLINK {
1301         my $mode = shift;
1302
1303         return (($mode & S_IFMT) == S_IFGITLINK)
1304 }
1305
1306 # convert file mode in octal to symbolic file mode string
1307 sub mode_str {
1308         my $mode = oct shift;
1309
1310         if (S_ISGITLINK($mode)) {
1311                 return 'm---------';
1312         } elsif (S_ISDIR($mode & S_IFMT)) {
1313                 return 'drwxr-xr-x';
1314         } elsif (S_ISLNK($mode)) {
1315                 return 'lrwxrwxrwx';
1316         } elsif (S_ISREG($mode)) {
1317                 # git cares only about the executable bit
1318                 if ($mode & S_IXUSR) {
1319                         return '-rwxr-xr-x';
1320                 } else {
1321                         return '-rw-r--r--';
1322                 };
1323         } else {
1324                 return '----------';
1325         }
1326 }
1327
1328 # convert file mode in octal to file type string
1329 sub file_type {
1330         my $mode = shift;
1331
1332         if ($mode !~ m/^[0-7]+$/) {
1333                 return $mode;
1334         } else {
1335                 $mode = oct $mode;
1336         }
1337
1338         if (S_ISGITLINK($mode)) {
1339                 return "submodule";
1340         } elsif (S_ISDIR($mode & S_IFMT)) {
1341                 return "directory";
1342         } elsif (S_ISLNK($mode)) {
1343                 return "symlink";
1344         } elsif (S_ISREG($mode)) {
1345                 return "file";
1346         } else {
1347                 return "unknown";
1348         }
1349 }
1350
1351 # convert file mode in octal to file type description string
1352 sub file_type_long {
1353         my $mode = shift;
1354
1355         if ($mode !~ m/^[0-7]+$/) {
1356                 return $mode;
1357         } else {
1358                 $mode = oct $mode;
1359         }
1360
1361         if (S_ISGITLINK($mode)) {
1362                 return "submodule";
1363         } elsif (S_ISDIR($mode & S_IFMT)) {
1364                 return "directory";
1365         } elsif (S_ISLNK($mode)) {
1366                 return "symlink";
1367         } elsif (S_ISREG($mode)) {
1368                 if ($mode & S_IXUSR) {
1369                         return "executable";
1370                 } else {
1371                         return "file";
1372                 };
1373         } else {
1374                 return "unknown";
1375         }
1376 }
1377
1378
1379 ## ----------------------------------------------------------------------
1380 ## functions returning short HTML fragments, or transforming HTML fragments
1381 ## which don't belong to other sections
1382
1383 # format line of commit message.
1384 sub format_log_line_html {
1385         my $line = shift;
1386
1387         $line = esc_html($line, -nbsp=>1);
1388         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1389                 $cgi->a({-href => href(action=>"object", hash=>$1),
1390                                         -class => "text"}, $1);
1391         }eg;
1392
1393         return $line;
1394 }
1395
1396 # format marker of refs pointing to given object
1397
1398 # the destination action is chosen based on object type and current context:
1399 # - for annotated tags, we choose the tag view unless it's the current view
1400 #   already, in which case we go to shortlog view
1401 # - for other refs, we keep the current view if we're in history, shortlog or
1402 #   log view, and select shortlog otherwise
1403 sub format_ref_marker {
1404         my ($refs, $id) = @_;
1405         my $markers = '';
1406
1407         if (defined $refs->{$id}) {
1408                 foreach my $ref (@{$refs->{$id}}) {
1409                         # this code exploits the fact that non-lightweight tags are the
1410                         # only indirect objects, and that they are the only objects for which
1411                         # we want to use tag instead of shortlog as action
1412                         my ($type, $name) = qw();
1413                         my $indirect = ($ref =~ s/\^\{\}$//);
1414                         # e.g. tags/v2.6.11 or heads/next
1415                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1416                                 $type = $1;
1417                                 $name = $2;
1418                         } else {
1419                                 $type = "ref";
1420                                 $name = $ref;
1421                         }
1422
1423                         my $class = $type;
1424                         $class .= " indirect" if $indirect;
1425
1426                         my $dest_action = "shortlog";
1427
1428                         if ($indirect) {
1429                                 $dest_action = "tag" unless $action eq "tag";
1430                         } elsif ($action =~ /^(history|(short)?log)$/) {
1431                                 $dest_action = $action;
1432                         }
1433
1434                         my $dest = "";
1435                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1436                         $dest .= $ref;
1437
1438                         my $link = $cgi->a({
1439                                 -href => href(
1440                                         action=>$dest_action,
1441                                         hash=>$dest
1442                                 )}, $name);
1443
1444                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1445                                 $link . "</span>";
1446                 }
1447         }
1448
1449         if ($markers) {
1450                 return ' <span class="refs">'. $markers . '</span>';
1451         } else {
1452                 return "";
1453         }
1454 }
1455
1456 # format, perhaps shortened and with markers, title line
1457 sub format_subject_html {
1458         my ($long, $short, $href, $extra) = @_;
1459         $extra = '' unless defined($extra);
1460
1461         if (length($short) < length($long)) {
1462                 $long =~ s/[[:cntrl:]]/?/g;
1463                 return $cgi->a({-href => $href, -class => "list subject",
1464                                 -title => to_utf8($long)},
1465                        esc_html($short) . $extra);
1466         } else {
1467                 return $cgi->a({-href => $href, -class => "list subject"},
1468                        esc_html($long)  . $extra);
1469         }
1470 }
1471
1472 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1473 sub format_git_diff_header_line {
1474         my $line = shift;
1475         my $diffinfo = shift;
1476         my ($from, $to) = @_;
1477
1478         if ($diffinfo->{'nparents'}) {
1479                 # combined diff
1480                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1481                 if ($to->{'href'}) {
1482                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1483                                          esc_path($to->{'file'}));
1484                 } else { # file was deleted (no href)
1485                         $line .= esc_path($to->{'file'});
1486                 }
1487         } else {
1488                 # "ordinary" diff
1489                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1490                 if ($from->{'href'}) {
1491                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1492                                          'a/' . esc_path($from->{'file'}));
1493                 } else { # file was added (no href)
1494                         $line .= 'a/' . esc_path($from->{'file'});
1495                 }
1496                 $line .= ' ';
1497                 if ($to->{'href'}) {
1498                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1499                                          'b/' . esc_path($to->{'file'}));
1500                 } else { # file was deleted
1501                         $line .= 'b/' . esc_path($to->{'file'});
1502                 }
1503         }
1504
1505         return "<div class=\"diff header\">$line</div>\n";
1506 }
1507
1508 # format extended diff header line, before patch itself
1509 sub format_extended_diff_header_line {
1510         my $line = shift;
1511         my $diffinfo = shift;
1512         my ($from, $to) = @_;
1513
1514         # match <path>
1515         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1516                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1517                                        esc_path($from->{'file'}));
1518         }
1519         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1520                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1521                                  esc_path($to->{'file'}));
1522         }
1523         # match single <mode>
1524         if ($line =~ m/\s(\d{6})$/) {
1525                 $line .= '<span class="info"> (' .
1526                          file_type_long($1) .
1527                          ')</span>';
1528         }
1529         # match <hash>
1530         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1531                 # can match only for combined diff
1532                 $line = 'index ';
1533                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1534                         if ($from->{'href'}[$i]) {
1535                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1536                                                   -class=>"hash"},
1537                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1538                         } else {
1539                                 $line .= '0' x 7;
1540                         }
1541                         # separator
1542                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1543                 }
1544                 $line .= '..';
1545                 if ($to->{'href'}) {
1546                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1547                                          substr($diffinfo->{'to_id'},0,7));
1548                 } else {
1549                         $line .= '0' x 7;
1550                 }
1551
1552         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1553                 # can match only for ordinary diff
1554                 my ($from_link, $to_link);
1555                 if ($from->{'href'}) {
1556                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1557                                              substr($diffinfo->{'from_id'},0,7));
1558                 } else {
1559                         $from_link = '0' x 7;
1560                 }
1561                 if ($to->{'href'}) {
1562                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1563                                            substr($diffinfo->{'to_id'},0,7));
1564                 } else {
1565                         $to_link = '0' x 7;
1566                 }
1567                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1568                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1569         }
1570
1571         return $line . "<br/>\n";
1572 }
1573
1574 # format from-file/to-file diff header
1575 sub format_diff_from_to_header {
1576         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1577         my $line;
1578         my $result = '';
1579
1580         $line = $from_line;
1581         #assert($line =~ m/^---/) if DEBUG;
1582         # no extra formatting for "^--- /dev/null"
1583         if (! $diffinfo->{'nparents'}) {
1584                 # ordinary (single parent) diff
1585                 if ($line =~ m!^--- "?a/!) {
1586                         if ($from->{'href'}) {
1587                                 $line = '--- a/' .
1588                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1589                                                 esc_path($from->{'file'}));
1590                         } else {
1591                                 $line = '--- a/' .
1592                                         esc_path($from->{'file'});
1593                         }
1594                 }
1595                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1596
1597         } else {
1598                 # combined diff (merge commit)
1599                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1600                         if ($from->{'href'}[$i]) {
1601                                 $line = '--- ' .
1602                                         $cgi->a({-href=>href(action=>"blobdiff",
1603                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1604                                                              hash_parent_base=>$parents[$i],
1605                                                              file_parent=>$from->{'file'}[$i],
1606                                                              hash=>$diffinfo->{'to_id'},
1607                                                              hash_base=>$hash,
1608                                                              file_name=>$to->{'file'}),
1609                                                  -class=>"path",
1610                                                  -title=>"diff" . ($i+1)},
1611                                                 $i+1) .
1612                                         '/' .
1613                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1614                                                 esc_path($from->{'file'}[$i]));
1615                         } else {
1616                                 $line = '--- /dev/null';
1617                         }
1618                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1619                 }
1620         }
1621
1622         $line = $to_line;
1623         #assert($line =~ m/^\+\+\+/) if DEBUG;
1624         # no extra formatting for "^+++ /dev/null"
1625         if ($line =~ m!^\+\+\+ "?b/!) {
1626                 if ($to->{'href'}) {
1627                         $line = '+++ b/' .
1628                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1629                                         esc_path($to->{'file'}));
1630                 } else {
1631                         $line = '+++ b/' .
1632                                 esc_path($to->{'file'});
1633                 }
1634         }
1635         $result .= qq!<div class="diff to_file">$line</div>\n!;
1636
1637         return $result;
1638 }
1639
1640 # create note for patch simplified by combined diff
1641 sub format_diff_cc_simplified {
1642         my ($diffinfo, @parents) = @_;
1643         my $result = '';
1644
1645         $result .= "<div class=\"diff header\">" .
1646                    "diff --cc ";
1647         if (!is_deleted($diffinfo)) {
1648                 $result .= $cgi->a({-href => href(action=>"blob",
1649                                                   hash_base=>$hash,
1650                                                   hash=>$diffinfo->{'to_id'},
1651                                                   file_name=>$diffinfo->{'to_file'}),
1652                                     -class => "path"},
1653                                    esc_path($diffinfo->{'to_file'}));
1654         } else {
1655                 $result .= esc_path($diffinfo->{'to_file'});
1656         }
1657         $result .= "</div>\n" . # class="diff header"
1658                    "<div class=\"diff nodifferences\">" .
1659                    "Simple merge" .
1660                    "</div>\n"; # class="diff nodifferences"
1661
1662         return $result;
1663 }
1664
1665 # format patch (diff) line (not to be used for diff headers)
1666 sub format_diff_line {
1667         my $line = shift;
1668         my ($from, $to) = @_;
1669         my $diff_class = "";
1670
1671         chomp $line;
1672
1673         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1674                 # combined diff
1675                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1676                 if ($line =~ m/^\@{3}/) {
1677                         $diff_class = " chunk_header";
1678                 } elsif ($line =~ m/^\\/) {
1679                         $diff_class = " incomplete";
1680                 } elsif ($prefix =~ tr/+/+/) {
1681                         $diff_class = " add";
1682                 } elsif ($prefix =~ tr/-/-/) {
1683                         $diff_class = " rem";
1684                 }
1685         } else {
1686                 # assume ordinary diff
1687                 my $char = substr($line, 0, 1);
1688                 if ($char eq '+') {
1689                         $diff_class = " add";
1690                 } elsif ($char eq '-') {
1691                         $diff_class = " rem";
1692                 } elsif ($char eq '@') {
1693                         $diff_class = " chunk_header";
1694                 } elsif ($char eq "\\") {
1695                         $diff_class = " incomplete";
1696                 }
1697         }
1698         $line = untabify($line);
1699         if ($from && $to && $line =~ m/^\@{2} /) {
1700                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1701                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1702
1703                 $from_lines = 0 unless defined $from_lines;
1704                 $to_lines   = 0 unless defined $to_lines;
1705
1706                 if ($from->{'href'}) {
1707                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1708                                              -class=>"list"}, $from_text);
1709                 }
1710                 if ($to->{'href'}) {
1711                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1712                                              -class=>"list"}, $to_text);
1713                 }
1714                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1715                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1716                 return "<div class=\"diff$diff_class\">$line</div>\n";
1717         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1718                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1719                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1720
1721                 @from_text = split(' ', $ranges);
1722                 for (my $i = 0; $i < @from_text; ++$i) {
1723                         ($from_start[$i], $from_nlines[$i]) =
1724                                 (split(',', substr($from_text[$i], 1)), 0);
1725                 }
1726
1727                 $to_text   = pop @from_text;
1728                 $to_start  = pop @from_start;
1729                 $to_nlines = pop @from_nlines;
1730
1731                 $line = "<span class=\"chunk_info\">$prefix ";
1732                 for (my $i = 0; $i < @from_text; ++$i) {
1733                         if ($from->{'href'}[$i]) {
1734                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1735                                                   -class=>"list"}, $from_text[$i]);
1736                         } else {
1737                                 $line .= $from_text[$i];
1738                         }
1739                         $line .= " ";
1740                 }
1741                 if ($to->{'href'}) {
1742                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1743                                           -class=>"list"}, $to_text);
1744                 } else {
1745                         $line .= $to_text;
1746                 }
1747                 $line .= " $prefix</span>" .
1748                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1749                 return "<div class=\"diff$diff_class\">$line</div>\n";
1750         }
1751         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1752 }
1753
1754 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1755 # linked.  Pass the hash of the tree/commit to snapshot.
1756 sub format_snapshot_links {
1757         my ($hash) = @_;
1758         my $num_fmts = @snapshot_fmts;
1759         if ($num_fmts > 1) {
1760                 # A parenthesized list of links bearing format names.
1761                 # e.g. "snapshot (_tar.gz_ _zip_)"
1762                 return "snapshot (" . join(' ', map
1763                         $cgi->a({
1764                                 -href => href(
1765                                         action=>"snapshot",
1766                                         hash=>$hash,
1767                                         snapshot_format=>$_
1768                                 )
1769                         }, $known_snapshot_formats{$_}{'display'})
1770                 , @snapshot_fmts) . ")";
1771         } elsif ($num_fmts == 1) {
1772                 # A single "snapshot" link whose tooltip bears the format name.
1773                 # i.e. "_snapshot_"
1774                 my ($fmt) = @snapshot_fmts;
1775                 return
1776                         $cgi->a({
1777                                 -href => href(
1778                                         action=>"snapshot",
1779                                         hash=>$hash,
1780                                         snapshot_format=>$fmt
1781                                 ),
1782                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1783                         }, "snapshot");
1784         } else { # $num_fmts == 0
1785                 return undef;
1786         }
1787 }
1788
1789 ## ......................................................................
1790 ## functions returning values to be passed, perhaps after some
1791 ## transformation, to other functions; e.g. returning arguments to href()
1792
1793 # returns hash to be passed to href to generate gitweb URL
1794 # in -title key it returns description of link
1795 sub get_feed_info {
1796         my $format = shift || 'Atom';
1797         my %res = (action => lc($format));
1798
1799         # feed links are possible only for project views
1800         return unless (defined $project);
1801         # some views should link to OPML, or to generic project feed,
1802         # or don't have specific feed yet (so they should use generic)
1803         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1804
1805         my $branch;
1806         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1807         # from tag links; this also makes possible to detect branch links
1808         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1809             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1810                 $branch = $1;
1811         }
1812         # find log type for feed description (title)
1813         my $type = 'log';
1814         if (defined $file_name) {
1815                 $type  = "history of $file_name";
1816                 $type .= "/" if ($action eq 'tree');
1817                 $type .= " on '$branch'" if (defined $branch);
1818         } else {
1819                 $type = "log of $branch" if (defined $branch);
1820         }
1821
1822         $res{-title} = $type;
1823         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1824         $res{'file_name'} = $file_name;
1825
1826         return %res;
1827 }
1828
1829 ## ----------------------------------------------------------------------
1830 ## git utility subroutines, invoking git commands
1831
1832 # returns path to the core git executable and the --git-dir parameter as list
1833 sub git_cmd {
1834         return $GIT, '--git-dir='.$git_dir;
1835 }
1836
1837 # quote the given arguments for passing them to the shell
1838 # quote_command("command", "arg 1", "arg with ' and ! characters")
1839 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1840 # Try to avoid using this function wherever possible.
1841 sub quote_command {
1842         return join(' ',
1843                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
1844 }
1845
1846 # get HEAD ref of given project as hash
1847 sub git_get_head_hash {
1848         my $project = shift;
1849         my $o_git_dir = $git_dir;
1850         my $retval = undef;
1851         $git_dir = "$projectroot/$project";
1852         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1853                 my $head = <$fd>;
1854                 close $fd;
1855                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1856                         $retval = $1;
1857                 }
1858         }
1859         if (defined $o_git_dir) {
1860                 $git_dir = $o_git_dir;
1861         }
1862         return $retval;
1863 }
1864
1865 # get type of given object
1866 sub git_get_type {
1867         my $hash = shift;
1868
1869         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1870         my $type = <$fd>;
1871         close $fd or return;
1872         chomp $type;
1873         return $type;
1874 }
1875
1876 # repository configuration
1877 our $config_file = '';
1878 our %config;
1879
1880 # store multiple values for single key as anonymous array reference
1881 # single values stored directly in the hash, not as [ <value> ]
1882 sub hash_set_multi {
1883         my ($hash, $key, $value) = @_;
1884
1885         if (!exists $hash->{$key}) {
1886                 $hash->{$key} = $value;
1887         } elsif (!ref $hash->{$key}) {
1888                 $hash->{$key} = [ $hash->{$key}, $value ];
1889         } else {
1890                 push @{$hash->{$key}}, $value;
1891         }
1892 }
1893
1894 # return hash of git project configuration
1895 # optionally limited to some section, e.g. 'gitweb'
1896 sub git_parse_project_config {
1897         my $section_regexp = shift;
1898         my %config;
1899
1900         local $/ = "\0";
1901
1902         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1903                 or return;
1904
1905         while (my $keyval = <$fh>) {
1906                 chomp $keyval;
1907                 my ($key, $value) = split(/\n/, $keyval, 2);
1908
1909                 hash_set_multi(\%config, $key, $value)
1910                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1911         }
1912         close $fh;
1913
1914         return %config;
1915 }
1916
1917 # convert config value to boolean: 'true' or 'false'
1918 # no value, number > 0, 'true' and 'yes' values are true
1919 # rest of values are treated as false (never as error)
1920 sub config_to_bool {
1921         my $val = shift;
1922
1923         return 1 if !defined $val;             # section.key
1924
1925         # strip leading and trailing whitespace
1926         $val =~ s/^\s+//;
1927         $val =~ s/\s+$//;
1928
1929         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
1930                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1931 }
1932
1933 # convert config value to simple decimal number
1934 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1935 # to be multiplied by 1024, 1048576, or 1073741824
1936 sub config_to_int {
1937         my $val = shift;
1938
1939         # strip leading and trailing whitespace
1940         $val =~ s/^\s+//;
1941         $val =~ s/\s+$//;
1942
1943         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1944                 $unit = lc($unit);
1945                 # unknown unit is treated as 1
1946                 return $num * ($unit eq 'g' ? 1073741824 :
1947                                $unit eq 'm' ?    1048576 :
1948                                $unit eq 'k' ?       1024 : 1);
1949         }
1950         return $val;
1951 }
1952
1953 # convert config value to array reference, if needed
1954 sub config_to_multi {
1955         my $val = shift;
1956
1957         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1958 }
1959
1960 sub git_get_project_config {
1961         my ($key, $type) = @_;
1962
1963         # key sanity check
1964         return unless ($key);
1965         $key =~ s/^gitweb\.//;
1966         return if ($key =~ m/\W/);
1967
1968         # type sanity check
1969         if (defined $type) {
1970                 $type =~ s/^--//;
1971                 $type = undef
1972                         unless ($type eq 'bool' || $type eq 'int');
1973         }
1974
1975         # get config
1976         if (!defined $config_file ||
1977             $config_file ne "$git_dir/config") {
1978                 %config = git_parse_project_config('gitweb');
1979                 $config_file = "$git_dir/config";
1980         }
1981
1982         # check if config variable (key) exists
1983         return unless exists $config{"gitweb.$key"};
1984
1985         # ensure given type
1986         if (!defined $type) {
1987                 return $config{"gitweb.$key"};
1988         } elsif ($type eq 'bool') {
1989                 # backward compatibility: 'git config --bool' returns true/false
1990                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1991         } elsif ($type eq 'int') {
1992                 return config_to_int($config{"gitweb.$key"});
1993         }
1994         return $config{"gitweb.$key"};
1995 }
1996
1997 # get hash of given path at given ref
1998 sub git_get_hash_by_path {
1999         my $base = shift;
2000         my $path = shift || return undef;
2001         my $type = shift;
2002
2003         $path =~ s,/+$,,;
2004
2005         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2006                 or die_error(500, "Open git-ls-tree failed");
2007         my $line = <$fd>;
2008         close $fd or return undef;
2009
2010         if (!defined $line) {
2011                 # there is no tree or hash given by $path at $base
2012                 return undef;
2013         }
2014
2015         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2016         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2017         if (defined $type && $type ne $2) {
2018                 # type doesn't match
2019                 return undef;
2020         }
2021         return $3;
2022 }
2023
2024 # get path of entry with given hash at given tree-ish (ref)
2025 # used to get 'from' filename for combined diff (merge commit) for renames
2026 sub git_get_path_by_hash {
2027         my $base = shift || return;
2028         my $hash = shift || return;
2029
2030         local $/ = "\0";
2031
2032         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2033                 or return undef;
2034         while (my $line = <$fd>) {
2035                 chomp $line;
2036
2037                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2038                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2039                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2040                         close $fd;
2041                         return $1;
2042                 }
2043         }
2044         close $fd;
2045         return undef;
2046 }
2047
2048 ## ......................................................................
2049 ## git utility functions, directly accessing git repository
2050
2051 sub git_get_project_description {
2052         my $path = shift;
2053
2054         $git_dir = "$projectroot/$path";
2055         open my $fd, '<', "$git_dir/description"
2056                 or return git_get_project_config('description');
2057         my $descr = <$fd>;
2058         close $fd;
2059         if (defined $descr) {
2060                 chomp $descr;
2061         }
2062         return $descr;
2063 }
2064
2065 sub git_get_project_ctags {
2066         my $path = shift;
2067         my $ctags = {};
2068
2069         $git_dir = "$projectroot/$path";
2070         opendir my $dh, "$git_dir/ctags"
2071                 or return $ctags;
2072         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2073                 open my $ct, '<', $_ or next;
2074                 my $val = <$ct>;
2075                 chomp $val;
2076                 close $ct;
2077                 my $ctag = $_; $ctag =~ s#.*/##;
2078                 $ctags->{$ctag} = $val;
2079         }
2080         closedir $dh;
2081         $ctags;
2082 }
2083
2084 sub git_populate_project_tagcloud {
2085         my $ctags = shift;
2086
2087         # First, merge different-cased tags; tags vote on casing
2088         my %ctags_lc;
2089         foreach (keys %$ctags) {
2090                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2091                 if (not $ctags_lc{lc $_}->{topcount}
2092                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2093                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2094                         $ctags_lc{lc $_}->{topname} = $_;
2095                 }
2096         }
2097
2098         my $cloud;
2099         if (eval { require HTML::TagCloud; 1; }) {
2100                 $cloud = HTML::TagCloud->new;
2101                 foreach (sort keys %ctags_lc) {
2102                         # Pad the title with spaces so that the cloud looks
2103                         # less crammed.
2104                         my $title = $ctags_lc{$_}->{topname};
2105                         $title =~ s/ /&nbsp;/g;
2106                         $title =~ s/^/&nbsp;/g;
2107                         $title =~ s/$/&nbsp;/g;
2108                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2109                 }
2110         } else {
2111                 $cloud = \%ctags_lc;
2112         }
2113         $cloud;
2114 }
2115
2116 sub git_show_project_tagcloud {
2117         my ($cloud, $count) = @_;
2118         print STDERR ref($cloud)."..\n";
2119         if (ref $cloud eq 'HTML::TagCloud') {
2120                 return $cloud->html_and_css($count);
2121         } else {
2122                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2123                 return '<p align="center">' . join (', ', map {
2124                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2125                 } splice(@tags, 0, $count)) . '</p>';
2126         }
2127 }
2128
2129 sub git_get_project_url_list {
2130         my $path = shift;
2131
2132         $git_dir = "$projectroot/$path";
2133         open my $fd, '<', "$git_dir/cloneurl"
2134                 or return wantarray ?
2135                 @{ config_to_multi(git_get_project_config('url')) } :
2136                    config_to_multi(git_get_project_config('url'));
2137         my @git_project_url_list = map { chomp; $_ } <$fd>;
2138         close $fd;
2139
2140         return wantarray ? @git_project_url_list : \@git_project_url_list;
2141 }
2142
2143 sub git_get_projects_list {
2144         my ($filter) = @_;
2145         my @list;
2146
2147         $filter ||= '';
2148         $filter =~ s/\.git$//;
2149
2150         my $check_forks = gitweb_check_feature('forks');
2151
2152         if (-d $projects_list) {
2153                 # search in directory
2154                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2155                 # remove the trailing "/"
2156                 $dir =~ s!/+$!!;
2157                 my $pfxlen = length("$dir");
2158                 my $pfxdepth = ($dir =~ tr!/!!);
2159
2160                 File::Find::find({
2161                         follow_fast => 1, # follow symbolic links
2162                         follow_skip => 2, # ignore duplicates
2163                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2164                         wanted => sub {
2165                                 # skip project-list toplevel, if we get it.
2166                                 return if (m!^[/.]$!);
2167                                 # only directories can be git repositories
2168                                 return unless (-d $_);
2169                                 # don't traverse too deep (Find is super slow on os x)
2170                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2171                                         $File::Find::prune = 1;
2172                                         return;
2173                                 }
2174
2175                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2176                                 # we check related file in $projectroot
2177                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2178                                 if (check_export_ok("$projectroot/$path")) {
2179                                         push @list, { path => $path };
2180                                         $File::Find::prune = 1;
2181                                 }
2182                         },
2183                 }, "$dir");
2184
2185         } elsif (-f $projects_list) {
2186                 # read from file(url-encoded):
2187                 # 'git%2Fgit.git Linus+Torvalds'
2188                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2189                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2190                 my %paths;
2191                 open my $fd, '<', $projects_list or return;
2192         PROJECT:
2193                 while (my $line = <$fd>) {
2194                         chomp $line;
2195                         my ($path, $owner) = split ' ', $line;
2196                         $path = unescape($path);
2197                         $owner = unescape($owner);
2198                         if (!defined $path) {
2199                                 next;
2200                         }
2201                         if ($filter ne '') {
2202                                 # looking for forks;
2203                                 my $pfx = substr($path, 0, length($filter));
2204                                 if ($pfx ne $filter) {
2205                                         next PROJECT;
2206                                 }
2207                                 my $sfx = substr($path, length($filter));
2208                                 if ($sfx !~ /^\/.*\.git$/) {
2209                                         next PROJECT;
2210                                 }
2211                         } elsif ($check_forks) {
2212                         PATH:
2213                                 foreach my $filter (keys %paths) {
2214                                         # looking for forks;
2215                                         my $pfx = substr($path, 0, length($filter));
2216                                         if ($pfx ne $filter) {
2217                                                 next PATH;
2218                                         }
2219                                         my $sfx = substr($path, length($filter));
2220                                         if ($sfx !~ /^\/.*\.git$/) {
2221                                                 next PATH;
2222                                         }
2223                                         # is a fork, don't include it in
2224                                         # the list
2225                                         next PROJECT;
2226                                 }
2227                         }
2228                         if (check_export_ok("$projectroot/$path")) {
2229                                 my $pr = {
2230                                         path => $path,
2231                                         owner => to_utf8($owner),
2232                                 };
2233                                 push @list, $pr;
2234                                 (my $forks_path = $path) =~ s/\.git$//;
2235                                 $paths{$forks_path}++;
2236                         }
2237                 }
2238                 close $fd;
2239         }
2240         return @list;
2241 }
2242
2243 our $gitweb_project_owner = undef;
2244 sub git_get_project_list_from_file {
2245
2246         return if (defined $gitweb_project_owner);
2247
2248         $gitweb_project_owner = {};
2249         # read from file (url-encoded):
2250         # 'git%2Fgit.git Linus+Torvalds'
2251         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2252         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2253         if (-f $projects_list) {
2254                 open(my $fd, '<', $projects_list);
2255                 while (my $line = <$fd>) {
2256                         chomp $line;
2257                         my ($pr, $ow) = split ' ', $line;
2258                         $pr = unescape($pr);
2259                         $ow = unescape($ow);
2260                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2261                 }
2262                 close $fd;
2263         }
2264 }
2265
2266 sub git_get_project_owner {
2267         my $project = shift;
2268         my $owner;
2269
2270         return undef unless $project;
2271         $git_dir = "$projectroot/$project";
2272
2273         if (!defined $gitweb_project_owner) {
2274                 git_get_project_list_from_file();
2275         }
2276
2277         if (exists $gitweb_project_owner->{$project}) {
2278                 $owner = $gitweb_project_owner->{$project};
2279         }
2280         if (!defined $owner){
2281                 $owner = git_get_project_config('owner');
2282         }
2283         if (!defined $owner) {
2284                 $owner = get_file_owner("$git_dir");
2285         }
2286
2287         return $owner;
2288 }
2289
2290 sub git_get_last_activity {
2291         my ($path) = @_;
2292         my $fd;
2293
2294         $git_dir = "$projectroot/$path";
2295         open($fd, "-|", git_cmd(), 'for-each-ref',
2296              '--format=%(committer)',
2297              '--sort=-committerdate',
2298              '--count=1',
2299              'refs/heads') or return;
2300         my $most_recent = <$fd>;
2301         close $fd or return;
2302         if (defined $most_recent &&
2303             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2304                 my $timestamp = $1;
2305                 my $age = time - $timestamp;
2306                 return ($age, age_string($age));
2307         }
2308         return (undef, undef);
2309 }
2310
2311 sub git_get_references {
2312         my $type = shift || "";
2313         my %refs;
2314         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2315         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2316         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2317                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2318                 or return;
2319
2320         while (my $line = <$fd>) {
2321                 chomp $line;
2322                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2323                         if (defined $refs{$1}) {
2324                                 push @{$refs{$1}}, $2;
2325                         } else {
2326                                 $refs{$1} = [ $2 ];
2327                         }
2328                 }
2329         }
2330         close $fd or return;
2331         return \%refs;
2332 }
2333
2334 sub git_get_rev_name_tags {
2335         my $hash = shift || return undef;
2336
2337         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2338                 or return;
2339         my $name_rev = <$fd>;
2340         close $fd;
2341
2342         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2343                 return $1;
2344         } else {
2345                 # catches also '$hash undefined' output
2346                 return undef;
2347         }
2348 }
2349
2350 ## ----------------------------------------------------------------------
2351 ## parse to hash functions
2352
2353 sub parse_date {
2354         my $epoch = shift;
2355         my $tz = shift || "-0000";
2356
2357         my %date;
2358         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2359         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2360         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2361         $date{'hour'} = $hour;
2362         $date{'minute'} = $min;
2363         $date{'mday'} = $mday;
2364         $date{'day'} = $days[$wday];
2365         $date{'month'} = $months[$mon];
2366         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2367                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2368         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2369                              $mday, $months[$mon], $hour ,$min;
2370         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2371                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2372
2373         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2374         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2375         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2376         $date{'hour_local'} = $hour;
2377         $date{'minute_local'} = $min;
2378         $date{'tz_local'} = $tz;
2379         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2380                                   1900+$year, $mon+1, $mday,
2381                                   $hour, $min, $sec, $tz);
2382         return %date;
2383 }
2384
2385 sub parse_tag {
2386         my $tag_id = shift;
2387         my %tag;
2388         my @comment;
2389
2390         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2391         $tag{'id'} = $tag_id;
2392         while (my $line = <$fd>) {
2393                 chomp $line;
2394                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2395                         $tag{'object'} = $1;
2396                 } elsif ($line =~ m/^type (.+)$/) {
2397                         $tag{'type'} = $1;
2398                 } elsif ($line =~ m/^tag (.+)$/) {
2399                         $tag{'name'} = $1;
2400                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2401                         $tag{'author'} = $1;
2402                         $tag{'epoch'} = $2;
2403                         $tag{'tz'} = $3;
2404                 } elsif ($line =~ m/--BEGIN/) {
2405                         push @comment, $line;
2406                         last;
2407                 } elsif ($line eq "") {
2408                         last;
2409                 }
2410         }
2411         push @comment, <$fd>;
2412         $tag{'comment'} = \@comment;
2413         close $fd or return;
2414         if (!defined $tag{'name'}) {
2415                 return
2416         };
2417         return %tag
2418 }
2419
2420 sub parse_commit_text {
2421         my ($commit_text, $withparents) = @_;
2422         my @commit_lines = split '\n', $commit_text;
2423         my %co;
2424
2425         pop @commit_lines; # Remove '\0'
2426
2427         if (! @commit_lines) {
2428                 return;
2429         }
2430
2431         my $header = shift @commit_lines;
2432         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2433                 return;
2434         }
2435         ($co{'id'}, my @parents) = split ' ', $header;
2436         while (my $line = shift @commit_lines) {
2437                 last if $line eq "\n";
2438                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2439                         $co{'tree'} = $1;
2440                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2441                         push @parents, $1;
2442                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2443                         $co{'author'} = $1;
2444                         $co{'author_epoch'} = $2;
2445                         $co{'author_tz'} = $3;
2446                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2447                                 $co{'author_name'}  = $1;
2448                                 $co{'author_email'} = $2;
2449                         } else {
2450                                 $co{'author_name'} = $co{'author'};
2451                         }
2452                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2453                         $co{'committer'} = $1;
2454                         $co{'committer_epoch'} = $2;
2455                         $co{'committer_tz'} = $3;
2456                         $co{'committer_name'} = $co{'committer'};
2457                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2458                                 $co{'committer_name'}  = $1;
2459                                 $co{'committer_email'} = $2;
2460                         } else {
2461                                 $co{'committer_name'} = $co{'committer'};
2462                         }
2463                 }
2464         }
2465         if (!defined $co{'tree'}) {
2466                 return;
2467         };
2468         $co{'parents'} = \@parents;
2469         $co{'parent'} = $parents[0];
2470
2471         foreach my $title (@commit_lines) {
2472                 $title =~ s/^    //;
2473                 if ($title ne "") {
2474                         $co{'title'} = chop_str($title, 80, 5);
2475                         # remove leading stuff of merges to make the interesting part visible
2476                         if (length($title) > 50) {
2477                                 $title =~ s/^Automatic //;
2478                                 $title =~ s/^merge (of|with) /Merge ... /i;
2479                                 if (length($title) > 50) {
2480                                         $title =~ s/(http|rsync):\/\///;
2481                                 }
2482                                 if (length($title) > 50) {
2483                                         $title =~ s/(master|www|rsync)\.//;
2484                                 }
2485                                 if (length($title) > 50) {
2486                                         $title =~ s/kernel.org:?//;
2487                                 }
2488                                 if (length($title) > 50) {
2489                                         $title =~ s/\/pub\/scm//;
2490                                 }
2491                         }
2492                         $co{'title_short'} = chop_str($title, 50, 5);
2493                         last;
2494                 }
2495         }
2496         if (! defined $co{'title'} || $co{'title'} eq "") {
2497                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2498         }
2499         # remove added spaces
2500         foreach my $line (@commit_lines) {
2501                 $line =~ s/^    //;
2502         }
2503         $co{'comment'} = \@commit_lines;
2504
2505         my $age = time - $co{'committer_epoch'};
2506         $co{'age'} = $age;
2507         $co{'age_string'} = age_string($age);
2508         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2509         if ($age > 60*60*24*7*2) {
2510                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2511                 $co{'age_string_age'} = $co{'age_string'};
2512         } else {
2513                 $co{'age_string_date'} = $co{'age_string'};
2514                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2515         }
2516         return %co;
2517 }
2518
2519 sub parse_commit {
2520         my ($commit_id) = @_;
2521         my %co;
2522
2523         local $/ = "\0";
2524
2525         open my $fd, "-|", git_cmd(), "rev-list",
2526                 "--parents",
2527                 "--header",
2528                 "--max-count=1",
2529                 $commit_id,
2530                 "--",
2531                 or die_error(500, "Open git-rev-list failed");
2532         %co = parse_commit_text(<$fd>, 1);
2533         close $fd;
2534
2535         return %co;
2536 }
2537
2538 sub parse_commits {
2539         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2540         my @cos;
2541
2542         $maxcount ||= 1;
2543         $skip ||= 0;
2544
2545         local $/ = "\0";
2546
2547         open my $fd, "-|", git_cmd(), "rev-list",
2548                 "--header",
2549                 @args,
2550                 ("--max-count=" . $maxcount),
2551                 ("--skip=" . $skip),
2552                 @extra_options,
2553                 $commit_id,
2554                 "--",
2555                 ($filename ? ($filename) : ())
2556                 or die_error(500, "Open git-rev-list failed");
2557         while (my $line = <$fd>) {
2558                 my %co = parse_commit_text($line);
2559                 push @cos, \%co;
2560         }
2561         close $fd;
2562
2563         return wantarray ? @cos : \@cos;
2564 }
2565
2566 # parse line of git-diff-tree "raw" output
2567 sub parse_difftree_raw_line {
2568         my $line = shift;
2569         my %res;
2570
2571         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2572         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2573         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2574                 $res{'from_mode'} = $1;
2575                 $res{'to_mode'} = $2;
2576                 $res{'from_id'} = $3;
2577                 $res{'to_id'} = $4;
2578                 $res{'status'} = $5;
2579                 $res{'similarity'} = $6;
2580                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2581                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2582                 } else {
2583                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2584                 }
2585         }
2586         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2587         # combined diff (for merge commit)
2588         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2589                 $res{'nparents'}  = length($1);
2590                 $res{'from_mode'} = [ split(' ', $2) ];
2591                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2592                 $res{'from_id'} = [ split(' ', $3) ];
2593                 $res{'to_id'} = pop @{$res{'from_id'}};
2594                 $res{'status'} = [ split('', $4) ];
2595                 $res{'to_file'} = unquote($5);
2596         }
2597         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2598         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2599                 $res{'commit'} = $1;
2600         }
2601
2602         return wantarray ? %res : \%res;
2603 }
2604
2605 # wrapper: return parsed line of git-diff-tree "raw" output
2606 # (the argument might be raw line, or parsed info)
2607 sub parsed_difftree_line {
2608         my $line_or_ref = shift;
2609
2610         if (ref($line_or_ref) eq "HASH") {
2611                 # pre-parsed (or generated by hand)
2612                 return $line_or_ref;
2613         } else {
2614                 return parse_difftree_raw_line($line_or_ref);
2615         }
2616 }
2617
2618 # parse line of git-ls-tree output
2619 sub parse_ls_tree_line {
2620         my $line = shift;
2621         my %opts = @_;
2622         my %res;
2623
2624         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2625         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2626
2627         $res{'mode'} = $1;
2628         $res{'type'} = $2;
2629         $res{'hash'} = $3;
2630         if ($opts{'-z'}) {
2631                 $res{'name'} = $4;
2632         } else {
2633                 $res{'name'} = unquote($4);
2634         }
2635
2636         return wantarray ? %res : \%res;
2637 }
2638
2639 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2640 sub parse_from_to_diffinfo {
2641         my ($diffinfo, $from, $to, @parents) = @_;
2642
2643         if ($diffinfo->{'nparents'}) {
2644                 # combined diff
2645                 $from->{'file'} = [];
2646                 $from->{'href'} = [];
2647                 fill_from_file_info($diffinfo, @parents)
2648                         unless exists $diffinfo->{'from_file'};
2649                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2650                         $from->{'file'}[$i] =
2651                                 defined $diffinfo->{'from_file'}[$i] ?
2652                                         $diffinfo->{'from_file'}[$i] :
2653                                         $diffinfo->{'to_file'};
2654                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2655                                 $from->{'href'}[$i] = href(action=>"blob",
2656                                                            hash_base=>$parents[$i],
2657                                                            hash=>$diffinfo->{'from_id'}[$i],
2658                                                            file_name=>$from->{'file'}[$i]);
2659                         } else {
2660                                 $from->{'href'}[$i] = undef;
2661                         }
2662                 }
2663         } else {
2664                 # ordinary (not combined) diff
2665                 $from->{'file'} = $diffinfo->{'from_file'};
2666                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2667                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2668                                                hash=>$diffinfo->{'from_id'},
2669                                                file_name=>$from->{'file'});
2670                 } else {
2671                         delete $from->{'href'};
2672                 }
2673         }
2674
2675         $to->{'file'} = $diffinfo->{'to_file'};
2676         if (!is_deleted($diffinfo)) { # file exists in result
2677                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2678                                      hash=>$diffinfo->{'to_id'},
2679                                      file_name=>$to->{'file'});
2680         } else {
2681                 delete $to->{'href'};
2682         }
2683 }
2684
2685 ## ......................................................................
2686 ## parse to array of hashes functions
2687
2688 sub git_get_heads_list {
2689         my $limit = shift;
2690         my @headslist;
2691
2692         open my $fd, '-|', git_cmd(), 'for-each-ref',
2693                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2694                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2695                 'refs/heads'
2696                 or return;
2697         while (my $line = <$fd>) {
2698                 my %ref_item;
2699
2700                 chomp $line;
2701                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2702                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2703                 my ($committer, $epoch, $tz) =
2704                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2705                 $ref_item{'fullname'}  = $name;
2706                 $name =~ s!^refs/heads/!!;
2707
2708                 $ref_item{'name'}  = $name;
2709                 $ref_item{'id'}    = $hash;
2710                 $ref_item{'title'} = $title || '(no commit message)';
2711                 $ref_item{'epoch'} = $epoch;
2712                 if ($epoch) {
2713                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2714                 } else {
2715                         $ref_item{'age'} = "unknown";
2716                 }
2717
2718                 push @headslist, \%ref_item;
2719         }
2720         close $fd;
2721
2722         return wantarray ? @headslist : \@headslist;
2723 }
2724
2725 sub git_get_tags_list {
2726         my $limit = shift;
2727         my @tagslist;
2728
2729         open my $fd, '-|', git_cmd(), 'for-each-ref',
2730                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2731                 '--format=%(objectname) %(objecttype) %(refname) '.
2732                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2733                 'refs/tags'
2734                 or return;
2735         while (my $line = <$fd>) {
2736                 my %ref_item;
2737
2738                 chomp $line;
2739                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2740                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2741                 my ($creator, $epoch, $tz) =
2742                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2743                 $ref_item{'fullname'} = $name;
2744                 $name =~ s!^refs/tags/!!;
2745
2746                 $ref_item{'type'} = $type;
2747                 $ref_item{'id'} = $id;
2748                 $ref_item{'name'} = $name;
2749                 if ($type eq "tag") {
2750                         $ref_item{'subject'} = $title;
2751                         $ref_item{'reftype'} = $reftype;
2752                         $ref_item{'refid'}   = $refid;
2753                 } else {
2754                         $ref_item{'reftype'} = $type;
2755                         $ref_item{'refid'}   = $id;
2756                 }
2757
2758                 if ($type eq "tag" || $type eq "commit") {
2759                         $ref_item{'epoch'} = $epoch;
2760                         if ($epoch) {
2761                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2762                         } else {
2763                                 $ref_item{'age'} = "unknown";
2764                         }
2765                 }
2766
2767                 push @tagslist, \%ref_item;
2768         }
2769         close $fd;
2770
2771         return wantarray ? @tagslist : \@tagslist;
2772 }
2773
2774 ## ----------------------------------------------------------------------
2775 ## filesystem-related functions
2776
2777 sub get_file_owner {
2778         my $path = shift;
2779
2780         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2781         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2782         if (!defined $gcos) {
2783                 return undef;
2784         }
2785         my $owner = $gcos;
2786         $owner =~ s/[,;].*$//;
2787         return to_utf8($owner);
2788 }
2789
2790 # assume that file exists
2791 sub insert_file {
2792         my $filename = shift;
2793
2794         open my $fd, '<', $filename;
2795         print map { to_utf8($_) } <$fd>;
2796         close $fd;
2797 }
2798
2799 ## ......................................................................
2800 ## mimetype related functions
2801
2802 sub mimetype_guess_file {
2803         my $filename = shift;
2804         my $mimemap = shift;
2805         -r $mimemap or return undef;
2806
2807         my %mimemap;
2808         open(my $mh, '<', $mimemap) or return undef;
2809         while (<$mh>) {
2810                 next if m/^#/; # skip comments
2811                 my ($mimetype, $exts) = split(/\t+/);
2812                 if (defined $exts) {
2813                         my @exts = split(/\s+/, $exts);
2814                         foreach my $ext (@exts) {
2815                                 $mimemap{$ext} = $mimetype;
2816                         }
2817                 }
2818         }
2819         close($mh);
2820
2821         $filename =~ /\.([^.]*)$/;
2822         return $mimemap{$1};
2823 }
2824
2825 sub mimetype_guess {
2826         my $filename = shift;
2827         my $mime;
2828         $filename =~ /\./ or return undef;
2829
2830         if ($mimetypes_file) {
2831                 my $file = $mimetypes_file;
2832                 if ($file !~ m!^/!) { # if it is relative path
2833                         # it is relative to project
2834                         $file = "$projectroot/$project/$file";
2835                 }
2836                 $mime = mimetype_guess_file($filename, $file);
2837         }
2838         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2839         return $mime;
2840 }
2841
2842 sub blob_mimetype {
2843         my $fd = shift;
2844         my $filename = shift;
2845
2846         if ($filename) {
2847                 my $mime = mimetype_guess($filename);
2848                 $mime and return $mime;
2849         }
2850
2851         # just in case
2852         return $default_blob_plain_mimetype unless $fd;
2853
2854         if (-T $fd) {
2855                 return 'text/plain';
2856         } elsif (! $filename) {
2857                 return 'application/octet-stream';
2858         } elsif ($filename =~ m/\.png$/i) {
2859                 return 'image/png';
2860         } elsif ($filename =~ m/\.gif$/i) {
2861                 return 'image/gif';
2862         } elsif ($filename =~ m/\.jpe?g$/i) {
2863                 return 'image/jpeg';
2864         } else {
2865                 return 'application/octet-stream';
2866         }
2867 }
2868
2869 sub blob_contenttype {
2870         my ($fd, $file_name, $type) = @_;
2871
2872         $type ||= blob_mimetype($fd, $file_name);
2873         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
2874                 $type .= "; charset=$default_text_plain_charset";
2875         }
2876
2877         return $type;
2878 }
2879
2880 ## ======================================================================
2881 ## functions printing HTML: header, footer, error page
2882
2883 sub git_header_html {
2884         my $status = shift || "200 OK";
2885         my $expires = shift;
2886
2887         my $title = "$site_name";
2888         if (defined $project) {
2889                 $title .= " - " . to_utf8($project);
2890                 if (defined $action) {
2891                         $title .= "/$action";
2892                         if (defined $file_name) {
2893                                 $title .= " - " . esc_path($file_name);
2894                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2895                                         $title .= "/";
2896                                 }
2897                         }
2898                 }
2899         }
2900         my $content_type;
2901         # require explicit support from the UA if we are to send the page as
2902         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2903         # we have to do this because MSIE sometimes globs '*/*', pretending to
2904         # support xhtml+xml but choking when it gets what it asked for.
2905         if (defined $cgi->http('HTTP_ACCEPT') &&
2906             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2907             $cgi->Accept('application/xhtml+xml') != 0) {
2908                 $content_type = 'application/xhtml+xml';
2909         } else {
2910                 $content_type = 'text/html';
2911         }
2912         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2913                            -status=> $status, -expires => $expires);
2914         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2915         print <<EOF;
2916 <?xml version="1.0" encoding="utf-8"?>
2917 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2918 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2919 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2920 <!-- git core binaries version $git_version -->
2921 <head>
2922 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2923 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2924 <meta name="robots" content="index, nofollow"/>
2925 <title>$title</title>
2926 EOF
2927         # the stylesheet, favicon etc urls won't work correctly with path_info
2928         # unless we set the appropriate base URL
2929         if ($ENV{'PATH_INFO'}) {
2930                 print "<base href=\"".esc_url($base_url)."\" />\n";
2931         }
2932         # print out each stylesheet that exist, providing backwards capability
2933         # for those people who defined $stylesheet in a config file
2934         if (defined $stylesheet) {
2935                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2936         } else {
2937                 foreach my $stylesheet (@stylesheets) {
2938                         next unless $stylesheet;
2939                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2940                 }
2941         }
2942         if (defined $project) {
2943                 my %href_params = get_feed_info();
2944                 if (!exists $href_params{'-title'}) {
2945                         $href_params{'-title'} = 'log';
2946                 }
2947
2948                 foreach my $format qw(RSS Atom) {
2949                         my $type = lc($format);
2950                         my %link_attr = (
2951                                 '-rel' => 'alternate',
2952                                 '-title' => "$project - $href_params{'-title'} - $format feed",
2953                                 '-type' => "application/$type+xml"
2954                         );
2955
2956                         $href_params{'action'} = $type;
2957                         $link_attr{'-href'} = href(%href_params);
2958                         print "<link ".
2959                               "rel=\"$link_attr{'-rel'}\" ".
2960                               "title=\"$link_attr{'-title'}\" ".
2961                               "href=\"$link_attr{'-href'}\" ".
2962                               "type=\"$link_attr{'-type'}\" ".
2963                               "/>\n";
2964
2965                         $href_params{'extra_options'} = '--no-merges';
2966                         $link_attr{'-href'} = href(%href_params);
2967                         $link_attr{'-title'} .= ' (no merges)';
2968                         print "<link ".
2969                               "rel=\"$link_attr{'-rel'}\" ".
2970                               "title=\"$link_attr{'-title'}\" ".
2971                               "href=\"$link_attr{'-href'}\" ".
2972                               "type=\"$link_attr{'-type'}\" ".
2973                               "/>\n";
2974                 }
2975
2976         } else {
2977                 printf('<link rel="alternate" title="%s projects list" '.
2978                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
2979                        $site_name, href(project=>undef, action=>"project_index"));
2980                 printf('<link rel="alternate" title="%s projects feeds" '.
2981                        'href="%s" type="text/x-opml" />'."\n",
2982                        $site_name, href(project=>undef, action=>"opml"));
2983         }
2984         if (defined $favicon) {
2985                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
2986         }
2987
2988         print "</head>\n" .
2989               "<body>\n";
2990
2991         if (-f $site_header) {
2992                 insert_file($site_header);
2993         }
2994
2995         print "<div class=\"page_header\">\n" .
2996               $cgi->a({-href => esc_url($logo_url),
2997                        -title => $logo_label},
2998                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2999         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3000         if (defined $project) {
3001                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3002                 if (defined $action) {
3003                         print " / $action";
3004                 }
3005                 print "\n";
3006         }
3007         print "</div>\n";
3008
3009         my $have_search = gitweb_check_feature('search');
3010         if (defined $project && $have_search) {
3011                 if (!defined $searchtext) {
3012                         $searchtext = "";
3013                 }
3014                 my $search_hash;
3015                 if (defined $hash_base) {
3016                         $search_hash = $hash_base;
3017                 } elsif (defined $hash) {
3018                         $search_hash = $hash;
3019                 } else {
3020                         $search_hash = "HEAD";
3021                 }
3022                 my $action = $my_uri;
3023                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3024                 if ($use_pathinfo) {
3025                         $action .= "/".esc_url($project);
3026                 }
3027                 print $cgi->startform(-method => "get", -action => $action) .
3028                       "<div class=\"search\">\n" .
3029                       (!$use_pathinfo &&
3030                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3031                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3032                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3033                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3034                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3035                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3036                       " search:\n",
3037                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3038                       "<span title=\"Extended regular expression\">" .
3039                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3040                                      -checked => $search_use_regexp) .
3041                       "</span>" .
3042                       "</div>" .
3043                       $cgi->end_form() . "\n";
3044         }
3045 }
3046
3047 sub git_footer_html {
3048         my $feed_class = 'rss_logo';
3049
3050         print "<div class=\"page_footer\">\n";
3051         if (defined $project) {
3052                 my $descr = git_get_project_description($project);
3053                 if (defined $descr) {
3054                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3055                 }
3056
3057                 my %href_params = get_feed_info();
3058                 if (!%href_params) {
3059                         $feed_class .= ' generic';
3060                 }
3061                 $href_params{'-title'} ||= 'log';
3062
3063                 foreach my $format qw(RSS Atom) {
3064                         $href_params{'action'} = lc($format);
3065                         print $cgi->a({-href => href(%href_params),
3066                                       -title => "$href_params{'-title'} $format feed",
3067                                       -class => $feed_class}, $format)."\n";
3068                 }
3069
3070         } else {
3071                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3072                               -class => $feed_class}, "OPML") . " ";
3073                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3074                               -class => $feed_class}, "TXT") . "\n";
3075         }
3076         print "</div>\n"; # class="page_footer"
3077
3078         if (-f $site_footer) {
3079                 insert_file($site_footer);
3080         }
3081
3082         print "</body>\n" .
3083               "</html>";
3084 }
3085
3086 # die_error(<http_status_code>, <error_message>)
3087 # Example: die_error(404, 'Hash not found')
3088 # By convention, use the following status codes (as defined in RFC 2616):
3089 # 400: Invalid or missing CGI parameters, or
3090 #      requested object exists but has wrong type.
3091 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3092 #      this server or project.
3093 # 404: Requested object/revision/project doesn't exist.
3094 # 500: The server isn't configured properly, or
3095 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3096 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3097 sub die_error {
3098         my $status = shift || 500;
3099         my $error = shift || "Internal server error";
3100
3101         my %http_responses = (400 => '400 Bad Request',
3102                               403 => '403 Forbidden',
3103                               404 => '404 Not Found',
3104                               500 => '500 Internal Server Error');
3105         git_header_html($http_responses{$status});
3106         print <<EOF;
3107 <div class="page_body">
3108 <br /><br />
3109 $status - $error
3110 <br />
3111 </div>
3112 EOF
3113         git_footer_html();
3114         exit;
3115 }
3116
3117 ## ----------------------------------------------------------------------
3118 ## functions printing or outputting HTML: navigation
3119
3120 sub git_print_page_nav {
3121         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3122         $extra = '' if !defined $extra; # pager or formats
3123
3124         my @navs = qw(summary shortlog log commit commitdiff tree);
3125         if ($suppress) {
3126                 @navs = grep { $_ ne $suppress } @navs;
3127         }
3128
3129         my %arg = map { $_ => {action=>$_} } @navs;
3130         if (defined $head) {
3131                 for (qw(commit commitdiff)) {
3132                         $arg{$_}{'hash'} = $head;
3133                 }
3134                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3135                         for (qw(shortlog log)) {
3136                                 $arg{$_}{'hash'} = $head;
3137                         }
3138                 }
3139         }
3140
3141         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3142         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3143
3144         my @actions = gitweb_get_feature('actions');
3145         my %repl = (
3146                 '%' => '%',
3147                 'n' => $project,         # project name
3148                 'f' => $git_dir,         # project path within filesystem
3149                 'h' => $treehead || '',  # current hash ('h' parameter)
3150                 'b' => $treebase || '',  # hash base ('hb' parameter)
3151         );
3152         while (@actions) {
3153                 my ($label, $link, $pos) = splice(@actions,0,3);
3154                 # insert
3155                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3156                 # munch munch
3157                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3158                 $arg{$label}{'_href'} = $link;
3159         }
3160
3161         print "<div class=\"page_nav\">\n" .
3162                 (join " | ",
3163                  map { $_ eq $current ?
3164                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3165                  } @navs);
3166         print "<br/>\n$extra<br/>\n" .
3167               "</div>\n";
3168 }
3169
3170 sub format_paging_nav {
3171         my ($action, $hash, $head, $page, $has_next_link) = @_;
3172         my $paging_nav;
3173
3174
3175         if ($hash ne $head || $page) {
3176                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3177         } else {
3178                 $paging_nav .= "HEAD";
3179         }
3180
3181         if ($page > 0) {
3182                 $paging_nav .= " &sdot; " .
3183                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3184                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3185         } else {
3186                 $paging_nav .= " &sdot; prev";
3187         }
3188
3189         if ($has_next_link) {
3190                 $paging_nav .= " &sdot; " .
3191                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3192                                  -accesskey => "n", -title => "Alt-n"}, "next");
3193         } else {
3194                 $paging_nav .= " &sdot; next";
3195         }
3196
3197         return $paging_nav;
3198 }
3199
3200 ## ......................................................................
3201 ## functions printing or outputting HTML: div
3202
3203 sub git_print_header_div {
3204         my ($action, $title, $hash, $hash_base) = @_;
3205         my %args = ();
3206
3207         $args{'action'} = $action;
3208         $args{'hash'} = $hash if $hash;
3209         $args{'hash_base'} = $hash_base if $hash_base;
3210
3211         print "<div class=\"header\">\n" .
3212               $cgi->a({-href => href(%args), -class => "title"},
3213               $title ? $title : $action) .
3214               "\n</div>\n";
3215 }
3216
3217 sub git_print_authorship {
3218         my $co = shift;
3219
3220         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3221         print "<div class=\"author_date\">" .
3222               esc_html($co->{'author_name'}) .
3223               " [$ad{'rfc2822'}";
3224         if ($ad{'hour_local'} < 6) {
3225                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3226                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3227         } else {
3228                 printf(" (%02d:%02d %s)",
3229                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3230         }
3231         print "]</div>\n";
3232 }
3233
3234 sub git_print_page_path {
3235         my $name = shift;
3236         my $type = shift;
3237         my $hb = shift;
3238
3239
3240         print "<div class=\"page_path\">";
3241         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3242                       -title => 'tree root'}, to_utf8("[$project]"));
3243         print " / ";
3244         if (defined $name) {
3245                 my @dirname = split '/', $name;
3246                 my $basename = pop @dirname;
3247                 my $fullname = '';
3248
3249                 foreach my $dir (@dirname) {
3250                         $fullname .= ($fullname ? '/' : '') . $dir;
3251                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3252                                                      hash_base=>$hb),
3253                                       -title => $fullname}, esc_path($dir));
3254                         print " / ";
3255                 }
3256                 if (defined $type && $type eq 'blob') {
3257                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3258                                                      hash_base=>$hb),
3259                                       -title => $name}, esc_path($basename));
3260                 } elsif (defined $type && $type eq 'tree') {
3261                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3262                                                      hash_base=>$hb),
3263                                       -title => $name}, esc_path($basename));
3264                         print " / ";
3265                 } else {
3266                         print esc_path($basename);
3267                 }
3268         }
3269         print "<br/></div>\n";
3270 }
3271
3272 sub git_print_log {
3273         my $log = shift;
3274         my %opts = @_;
3275
3276         if ($opts{'-remove_title'}) {
3277                 # remove title, i.e. first line of log
3278                 shift @$log;
3279         }
3280         # remove leading empty lines
3281         while (defined $log->[0] && $log->[0] eq "") {
3282                 shift @$log;
3283         }
3284
3285         # print log
3286         my $signoff = 0;
3287         my $empty = 0;
3288         foreach my $line (@$log) {
3289                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3290                         $signoff = 1;
3291                         $empty = 0;
3292                         if (! $opts{'-remove_signoff'}) {
3293                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3294                                 next;
3295                         } else {
3296                                 # remove signoff lines
3297                                 next;
3298                         }
3299                 } else {
3300                         $signoff = 0;
3301                 }
3302
3303                 # print only one empty line
3304                 # do not print empty line after signoff
3305                 if ($line eq "") {
3306                         next if ($empty || $signoff);
3307                         $empty = 1;
3308                 } else {
3309                         $empty = 0;
3310                 }
3311
3312                 print format_log_line_html($line) . "<br/>\n";
3313         }
3314
3315         if ($opts{'-final_empty_line'}) {
3316                 # end with single empty line
3317                 print "<br/>\n" unless $empty;
3318         }
3319 }
3320
3321 # return link target (what link points to)
3322 sub git_get_link_target {
3323         my $hash = shift;
3324         my $link_target;
3325
3326         # read link
3327         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3328                 or return;
3329         {
3330                 local $/ = undef;
3331                 $link_target = <$fd>;
3332         }
3333         close $fd
3334                 or return;
3335
3336         return $link_target;
3337 }
3338
3339 # given link target, and the directory (basedir) the link is in,
3340 # return target of link relative to top directory (top tree);
3341 # return undef if it is not possible (including absolute links).
3342 sub normalize_link_target {
3343         my ($link_target, $basedir) = @_;
3344
3345         # absolute symlinks (beginning with '/') cannot be normalized
3346         return if (substr($link_target, 0, 1) eq '/');
3347
3348         # normalize link target to path from top (root) tree (dir)
3349         my $path;
3350         if ($basedir) {
3351                 $path = $basedir . '/' . $link_target;
3352         } else {
3353                 # we are in top (root) tree (dir)
3354                 $path = $link_target;
3355         }
3356
3357         # remove //, /./, and /../
3358         my @path_parts;
3359         foreach my $part (split('/', $path)) {
3360                 # discard '.' and ''
3361                 next if (!$part || $part eq '.');
3362                 # handle '..'
3363                 if ($part eq '..') {
3364                         if (@path_parts) {
3365                                 pop @path_parts;
3366                         } else {
3367                                 # link leads outside repository (outside top dir)
3368                                 return;
3369                         }
3370                 } else {
3371                         push @path_parts, $part;
3372                 }
3373         }
3374         $path = join('/', @path_parts);
3375
3376         return $path;
3377 }
3378
3379 # print tree entry (row of git_tree), but without encompassing <tr> element
3380 sub git_print_tree_entry {
3381         my ($t, $basedir, $hash_base, $have_blame) = @_;
3382
3383         my %base_key = ();
3384         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3385
3386         # The format of a table row is: mode list link.  Where mode is
3387         # the mode of the entry, list is the name of the entry, an href,
3388         # and link is the action links of the entry.
3389
3390         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3391         if ($t->{'type'} eq "blob") {
3392                 print "<td class=\"list\">" .
3393                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3394                                                file_name=>"$basedir$t->{'name'}", %base_key),
3395                                 -class => "list"}, esc_path($t->{'name'}));
3396                 if (S_ISLNK(oct $t->{'mode'})) {
3397                         my $link_target = git_get_link_target($t->{'hash'});
3398                         if ($link_target) {
3399                                 my $norm_target = normalize_link_target($link_target, $basedir);
3400                                 if (defined $norm_target) {
3401                                         print " -> " .
3402                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3403                                                                      file_name=>$norm_target),
3404                                                        -title => $norm_target}, esc_path($link_target));
3405                                 } else {
3406                                         print " -> " . esc_path($link_target);
3407                                 }
3408                         }
3409                 }
3410                 print "</td>\n";
3411                 print "<td class=\"link\">";
3412                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3413                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3414                               "blob");
3415                 if ($have_blame) {
3416                         print " | " .
3417                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3418                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3419                                       "blame");
3420                 }
3421                 if (defined $hash_base) {
3422                         print " | " .
3423                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3424                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3425                                       "history");
3426                 }
3427                 print " | " .
3428                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3429                                                file_name=>"$basedir$t->{'name'}")},
3430                                 "raw");
3431                 print "</td>\n";
3432
3433         } elsif ($t->{'type'} eq "tree") {
3434                 print "<td class=\"list\">";
3435                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3436                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3437                               esc_path($t->{'name'}));
3438                 print "</td>\n";
3439                 print "<td class=\"link\">";
3440                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3441                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3442                               "tree");
3443                 if (defined $hash_base) {
3444                         print " | " .
3445                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3446                                                      file_name=>"$basedir$t->{'name'}")},
3447                                       "history");
3448                 }
3449                 print "</td>\n";
3450         } else {
3451                 # unknown object: we can only present history for it
3452                 # (this includes 'commit' object, i.e. submodule support)
3453                 print "<td class=\"list\">" .
3454                       esc_path($t->{'name'}) .
3455                       "</td>\n";
3456                 print "<td class=\"link\">";
3457                 if (defined $hash_base) {
3458                         print $cgi->a({-href => href(action=>"history",
3459                                                      hash_base=>$hash_base,
3460                                                      file_name=>"$basedir$t->{'name'}")},
3461                                       "history");
3462                 }
3463                 print "</td>\n";
3464         }
3465 }
3466
3467 ## ......................................................................
3468 ## functions printing large fragments of HTML
3469
3470 # get pre-image filenames for merge (combined) diff
3471 sub fill_from_file_info {
3472         my ($diff, @parents) = @_;
3473
3474         $diff->{'from_file'} = [ ];
3475         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3476         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3477                 if ($diff->{'status'}[$i] eq 'R' ||
3478                     $diff->{'status'}[$i] eq 'C') {
3479                         $diff->{'from_file'}[$i] =
3480                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3481                 }
3482         }
3483
3484         return $diff;
3485 }
3486
3487 # is current raw difftree line of file deletion
3488 sub is_deleted {
3489         my $diffinfo = shift;
3490
3491         return $diffinfo->{'to_id'} eq ('0' x 40);
3492 }
3493
3494 # does patch correspond to [previous] difftree raw line
3495 # $diffinfo  - hashref of parsed raw diff format
3496 # $patchinfo - hashref of parsed patch diff format
3497 #              (the same keys as in $diffinfo)
3498 sub is_patch_split {
3499         my ($diffinfo, $patchinfo) = @_;
3500
3501         return defined $diffinfo && defined $patchinfo
3502                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3503 }
3504
3505
3506 sub git_difftree_body {
3507         my ($difftree, $hash, @parents) = @_;
3508         my ($parent) = $parents[0];
3509         my $have_blame = gitweb_check_feature('blame');
3510         print "<div class=\"list_head\">\n";
3511         if ($#{$difftree} > 10) {
3512                 print(($#{$difftree} + 1) . " files changed:\n");
3513         }
3514         print "</div>\n";
3515
3516         print "<table class=\"" .
3517               (@parents > 1 ? "combined " : "") .
3518               "diff_tree\">\n";
3519
3520         # header only for combined diff in 'commitdiff' view
3521         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3522         if ($has_header) {
3523                 # table header
3524                 print "<thead><tr>\n" .
3525                        "<th></th><th></th>\n"; # filename, patchN link
3526                 for (my $i = 0; $i < @parents; $i++) {
3527                         my $par = $parents[$i];
3528                         print "<th>" .
3529                               $cgi->a({-href => href(action=>"commitdiff",
3530                                                      hash=>$hash, hash_parent=>$par),
3531                                        -title => 'commitdiff to parent number ' .
3532                                                   ($i+1) . ': ' . substr($par,0,7)},
3533                                       $i+1) .
3534                               "&nbsp;</th>\n";
3535                 }
3536                 print "</tr></thead>\n<tbody>\n";
3537         }
3538
3539         my $alternate = 1;
3540         my $patchno = 0;
3541         foreach my $line (@{$difftree}) {
3542                 my $diff = parsed_difftree_line($line);
3543
3544                 if ($alternate) {
3545                         print "<tr class=\"dark\">\n";
3546                 } else {
3547                         print "<tr class=\"light\">\n";
3548                 }
3549                 $alternate ^= 1;
3550
3551                 if (exists $diff->{'nparents'}) { # combined diff
3552
3553                         fill_from_file_info($diff, @parents)
3554                                 unless exists $diff->{'from_file'};
3555
3556                         if (!is_deleted($diff)) {
3557                                 # file exists in the result (child) commit
3558                                 print "<td>" .
3559                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3560                                                              file_name=>$diff->{'to_file'},
3561                                                              hash_base=>$hash),
3562                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3563                                       "</td>\n";
3564                         } else {
3565                                 print "<td>" .
3566                                       esc_path($diff->{'to_file'}) .
3567                                       "</td>\n";
3568                         }
3569
3570                         if ($action eq 'commitdiff') {
3571                                 # link to patch
3572                                 $patchno++;
3573                                 print "<td class=\"link\">" .
3574                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3575                                       " | " .
3576                                       "</td>\n";
3577                         }
3578
3579                         my $has_history = 0;
3580                         my $not_deleted = 0;
3581                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3582                                 my $hash_parent = $parents[$i];
3583                                 my $from_hash = $diff->{'from_id'}[$i];
3584                                 my $from_path = $diff->{'from_file'}[$i];
3585                                 my $status = $diff->{'status'}[$i];
3586
3587                                 $has_history ||= ($status ne 'A');
3588                                 $not_deleted ||= ($status ne 'D');
3589
3590                                 if ($status eq 'A') {
3591                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3592                                 } elsif ($status eq 'D') {
3593                                         print "<td class=\"link\">" .
3594                                               $cgi->a({-href => href(action=>"blob",
3595                                                                      hash_base=>$hash,
3596                                                                      hash=>$from_hash,
3597                                                                      file_name=>$from_path)},
3598                                                       "blob" . ($i+1)) .
3599                                               " | </td>\n";
3600                                 } else {
3601                                         if ($diff->{'to_id'} eq $from_hash) {
3602                                                 print "<td class=\"link nochange\">";
3603                                         } else {
3604                                                 print "<td class=\"link\">";
3605                                         }
3606                                         print $cgi->a({-href => href(action=>"blobdiff",
3607                                                                      hash=>$diff->{'to_id'},
3608                                                                      hash_parent=>$from_hash,
3609                                                                      hash_base=>$hash,
3610                                                                      hash_parent_base=>$hash_parent,
3611                                                                      file_name=>$diff->{'to_file'},
3612                                                                      file_parent=>$from_path)},
3613                                                       "diff" . ($i+1)) .
3614                                               " | </td>\n";
3615                                 }
3616                         }
3617
3618                         print "<td class=\"link\">";
3619                         if ($not_deleted) {
3620                                 print $cgi->a({-href => href(action=>"blob",
3621                                                              hash=>$diff->{'to_id'},
3622                                                              file_name=>$diff->{'to_file'},
3623                                                              hash_base=>$hash)},
3624                                               "blob");
3625                                 print " | " if ($has_history);
3626                         }
3627                         if ($has_history) {
3628                                 print $cgi->a({-href => href(action=>"history",
3629                                                              file_name=>$diff->{'to_file'},
3630                                                              hash_base=>$hash)},
3631                                               "history");
3632                         }
3633                         print "</td>\n";
3634
3635                         print "</tr>\n";
3636                         next; # instead of 'else' clause, to avoid extra indent
3637                 }
3638                 # else ordinary diff
3639
3640                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3641                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3642                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3643                         $to_mode_oct = oct $diff->{'to_mode'};
3644                         if (S_ISREG($to_mode_oct)) { # only for regular file
3645                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3646                         }
3647                         $to_file_type = file_type($diff->{'to_mode'});
3648                 }
3649                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3650                         $from_mode_oct = oct $diff->{'from_mode'};
3651                         if (S_ISREG($to_mode_oct)) { # only for regular file
3652                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3653                         }
3654                         $from_file_type = file_type($diff->{'from_mode'});
3655                 }
3656
3657                 if ($diff->{'status'} eq "A") { # created
3658                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3659                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3660                         $mode_chng   .= "]</span>";
3661                         print "<td>";
3662                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3663                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3664                                       -class => "list"}, esc_path($diff->{'file'}));
3665                         print "</td>\n";
3666                         print "<td>$mode_chng</td>\n";
3667                         print "<td class=\"link\">";
3668                         if ($action eq 'commitdiff') {
3669                                 # link to patch
3670                                 $patchno++;
3671                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3672                                 print " | ";
3673                         }
3674                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3675                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3676                                       "blob");
3677                         print "</td>\n";
3678
3679                 } elsif ($diff->{'status'} eq "D") { # deleted
3680                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3681                         print "<td>";
3682                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3683                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3684                                        -class => "list"}, esc_path($diff->{'file'}));
3685                         print "</td>\n";
3686                         print "<td>$mode_chng</td>\n";
3687                         print "<td class=\"link\">";
3688                         if ($action eq 'commitdiff') {
3689                                 # link to patch
3690                                 $patchno++;
3691                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3692                                 print " | ";
3693                         }
3694                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3695                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3696                                       "blob") . " | ";
3697                         if ($have_blame) {
3698                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3699                                                              file_name=>$diff->{'file'})},
3700                                               "blame") . " | ";
3701                         }
3702                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3703                                                      file_name=>$diff->{'file'})},
3704                                       "history");
3705                         print "</td>\n";
3706
3707                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3708                         my $mode_chnge = "";
3709                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3710                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3711                                 if ($from_file_type ne $to_file_type) {
3712                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3713                                 }
3714                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3715                                         if ($from_mode_str && $to_mode_str) {
3716                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3717                                         } elsif ($to_mode_str) {
3718                                                 $mode_chnge .= " mode: $to_mode_str";
3719                                         }
3720                                 }
3721                                 $mode_chnge .= "]</span>\n";
3722                         }
3723                         print "<td>";
3724                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3725                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3726                                       -class => "list"}, esc_path($diff->{'file'}));
3727                         print "</td>\n";
3728                         print "<td>$mode_chnge</td>\n";
3729                         print "<td class=\"link\">";
3730                         if ($action eq 'commitdiff') {
3731                                 # link to patch
3732                                 $patchno++;
3733                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3734                                       " | ";
3735                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3736                                 # "commit" view and modified file (not onlu mode changed)
3737                                 print $cgi->a({-href => href(action=>"blobdiff",
3738                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3739                                                              hash_base=>$hash, hash_parent_base=>$parent,
3740                                                              file_name=>$diff->{'file'})},
3741                                               "diff") .
3742                                       " | ";
3743                         }
3744                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3745                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3746                                        "blob") . " | ";
3747                         if ($have_blame) {
3748                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3749                                                              file_name=>$diff->{'file'})},
3750                                               "blame") . " | ";
3751                         }
3752                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3753                                                      file_name=>$diff->{'file'})},
3754                                       "history");
3755                         print "</td>\n";
3756
3757                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3758                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3759                         my $nstatus = $status_name{$diff->{'status'}};
3760                         my $mode_chng = "";
3761                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3762                                 # mode also for directories, so we cannot use $to_mode_str
3763                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3764                         }
3765                         print "<td>" .
3766                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3767                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3768                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3769                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3770                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3771                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3772                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3773                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3774                               "<td class=\"link\">";
3775                         if ($action eq 'commitdiff') {
3776                                 # link to patch
3777                                 $patchno++;
3778                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3779                                       " | ";
3780                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3781                                 # "commit" view and modified file (not only pure rename or copy)
3782                                 print $cgi->a({-href => href(action=>"blobdiff",
3783                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3784                                                              hash_base=>$hash, hash_parent_base=>$parent,
3785                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3786                                               "diff") .
3787                                       " | ";
3788                         }
3789                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3790                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3791                                       "blob") . " | ";
3792                         if ($have_blame) {
3793                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3794                                                              file_name=>$diff->{'to_file'})},
3795                                               "blame") . " | ";
3796                         }
3797                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3798                                                     file_name=>$diff->{'to_file'})},
3799                                       "history");
3800                         print "</td>\n";
3801
3802                 } # we should not encounter Unmerged (U) or Unknown (X) status
3803                 print "</tr>\n";
3804         }
3805         print "</tbody>" if $has_header;
3806         print "</table>\n";
3807 }
3808
3809 sub git_patchset_body {
3810         my ($fd, $difftree, $hash, @hash_parents) = @_;
3811         my ($hash_parent) = $hash_parents[0];
3812
3813         my $is_combined = (@hash_parents > 1);
3814         my $patch_idx = 0;
3815         my $patch_number = 0;
3816         my $patch_line;
3817         my $diffinfo;
3818         my $to_name;
3819         my (%from, %to);
3820
3821         print "<div class=\"patchset\">\n";
3822
3823         # skip to first patch
3824         while ($patch_line = <$fd>) {
3825                 chomp $patch_line;
3826
3827                 last if ($patch_line =~ m/^diff /);
3828         }
3829
3830  PATCH:
3831         while ($patch_line) {
3832
3833                 # parse "git diff" header line
3834                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3835                         # $1 is from_name, which we do not use
3836                         $to_name = unquote($2);
3837                         $to_name =~ s!^b/!!;
3838                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3839                         # $1 is 'cc' or 'combined', which we do not use
3840                         $to_name = unquote($2);
3841                 } else {
3842                         $to_name = undef;
3843                 }
3844
3845                 # check if current patch belong to current raw line
3846                 # and parse raw git-diff line if needed
3847                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3848                         # this is continuation of a split patch
3849                         print "<div class=\"patch cont\">\n";
3850                 } else {
3851                         # advance raw git-diff output if needed
3852                         $patch_idx++ if defined $diffinfo;
3853
3854                         # read and prepare patch information
3855                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3856
3857                         # compact combined diff output can have some patches skipped
3858                         # find which patch (using pathname of result) we are at now;
3859                         if ($is_combined) {
3860                                 while ($to_name ne $diffinfo->{'to_file'}) {
3861                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3862                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3863                                               "</div>\n";  # class="patch"
3864
3865                                         $patch_idx++;
3866                                         $patch_number++;
3867
3868                                         last if $patch_idx > $#$difftree;
3869                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3870                                 }
3871                         }
3872
3873                         # modifies %from, %to hashes
3874                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3875
3876                         # this is first patch for raw difftree line with $patch_idx index
3877                         # we index @$difftree array from 0, but number patches from 1
3878                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3879                 }
3880
3881                 # git diff header
3882                 #assert($patch_line =~ m/^diff /) if DEBUG;
3883                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3884                 $patch_number++;
3885                 # print "git diff" header
3886                 print format_git_diff_header_line($patch_line, $diffinfo,
3887                                                   \%from, \%to);
3888
3889                 # print extended diff header
3890                 print "<div class=\"diff extended_header\">\n";
3891         EXTENDED_HEADER:
3892                 while ($patch_line = <$fd>) {
3893                         chomp $patch_line;
3894
3895                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3896
3897                         print format_extended_diff_header_line($patch_line, $diffinfo,
3898                                                                \%from, \%to);
3899                 }
3900                 print "</div>\n"; # class="diff extended_header"
3901
3902                 # from-file/to-file diff header
3903                 if (! $patch_line) {
3904                         print "</div>\n"; # class="patch"
3905                         last PATCH;
3906                 }
3907                 next PATCH if ($patch_line =~ m/^diff /);
3908                 #assert($patch_line =~ m/^---/) if DEBUG;
3909
3910                 my $last_patch_line = $patch_line;
3911                 $patch_line = <$fd>;
3912                 chomp $patch_line;
3913                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3914
3915                 print format_diff_from_to_header($last_patch_line, $patch_line,
3916                                                  $diffinfo, \%from, \%to,
3917                                                  @hash_parents);
3918
3919                 # the patch itself
3920         LINE:
3921                 while ($patch_line = <$fd>) {
3922                         chomp $patch_line;
3923
3924                         next PATCH if ($patch_line =~ m/^diff /);
3925
3926                         print format_diff_line($patch_line, \%from, \%to);
3927                 }
3928
3929         } continue {
3930                 print "</div>\n"; # class="patch"
3931         }
3932
3933         # for compact combined (--cc) format, with chunk and patch simpliciaction
3934         # patchset might be empty, but there might be unprocessed raw lines
3935         for (++$patch_idx if $patch_number > 0;
3936              $patch_idx < @$difftree;
3937              ++$patch_idx) {
3938                 # read and prepare patch information
3939                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3940
3941                 # generate anchor for "patch" links in difftree / whatchanged part
3942                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3943                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3944                       "</div>\n";  # class="patch"
3945
3946                 $patch_number++;
3947         }
3948
3949         if ($patch_number == 0) {
3950                 if (@hash_parents > 1) {
3951                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3952                 } else {
3953                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3954                 }
3955         }
3956
3957         print "</div>\n"; # class="patchset"
3958 }
3959
3960 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3961
3962 # fills project list info (age, description, owner, forks) for each
3963 # project in the list, removing invalid projects from returned list
3964 # NOTE: modifies $projlist, but does not remove entries from it
3965 sub fill_project_list_info {
3966         my ($projlist, $check_forks) = @_;
3967         my @projects;
3968
3969         my $show_ctags = gitweb_check_feature('ctags');
3970  PROJECT:
3971         foreach my $pr (@$projlist) {
3972                 my (@activity) = git_get_last_activity($pr->{'path'});
3973                 unless (@activity) {
3974                         next PROJECT;
3975                 }
3976                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
3977                 if (!defined $pr->{'descr'}) {
3978                         my $descr = git_get_project_description($pr->{'path'}) || "";
3979                         $descr = to_utf8($descr);
3980                         $pr->{'descr_long'} = $descr;
3981                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3982                 }
3983                 if (!defined $pr->{'owner'}) {
3984                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3985                 }
3986                 if ($check_forks) {
3987                         my $pname = $pr->{'path'};
3988                         if (($pname =~ s/\.git$//) &&
3989                             ($pname !~ /\/$/) &&
3990                             (-d "$projectroot/$pname")) {
3991                                 $pr->{'forks'} = "-d $projectroot/$pname";
3992                         } else {
3993                                 $pr->{'forks'} = 0;
3994                         }
3995                 }
3996                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
3997                 push @projects, $pr;
3998         }
3999
4000         return @projects;
4001 }
4002
4003 # print 'sort by' <th> element, generating 'sort by $name' replay link
4004 # if that order is not selected
4005 sub print_sort_th {
4006         my ($name, $order, $header) = @_;
4007         $header ||= ucfirst($name);
4008
4009         if ($order eq $name) {
4010                 print "<th>$header</th>\n";
4011         } else {
4012                 print "<th>" .
4013                       $cgi->a({-href => href(-replay=>1, order=>$name),
4014                                -class => "header"}, $header) .
4015                       "</th>\n";
4016         }
4017 }
4018
4019 sub git_project_list_body {
4020         # actually uses global variable $project
4021         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4022
4023         my $check_forks = gitweb_check_feature('forks');
4024         my @projects = fill_project_list_info($projlist, $check_forks);
4025
4026         $order ||= $default_projects_order;
4027         $from = 0 unless defined $from;
4028         $to = $#projects if (!defined $to || $#projects < $to);
4029
4030         my %order_info = (
4031                 project => { key => 'path', type => 'str' },
4032                 descr => { key => 'descr_long', type => 'str' },
4033                 owner => { key => 'owner', type => 'str' },
4034                 age => { key => 'age', type => 'num' }
4035         );
4036         my $oi = $order_info{$order};
4037         if ($oi->{'type'} eq 'str') {
4038                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4039         } else {
4040                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4041         }
4042
4043         my $show_ctags = gitweb_check_feature('ctags');
4044         if ($show_ctags) {
4045                 my %ctags;
4046                 foreach my $p (@projects) {
4047                         foreach my $ct (keys %{$p->{'ctags'}}) {
4048                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4049                         }
4050                 }
4051                 my $cloud = git_populate_project_tagcloud(\%ctags);
4052                 print git_show_project_tagcloud($cloud, 64);
4053         }
4054
4055         print "<table class=\"project_list\">\n";
4056         unless ($no_header) {
4057                 print "<tr>\n";
4058                 if ($check_forks) {
4059                         print "<th></th>\n";
4060                 }
4061                 print_sort_th('project', $order, 'Project');
4062                 print_sort_th('descr', $order, 'Description');
4063                 print_sort_th('owner', $order, 'Owner');
4064                 print_sort_th('age', $order, 'Last Change');
4065                 print "<th></th>\n" . # for links
4066                       "</tr>\n";
4067         }
4068         my $alternate = 1;
4069         my $tagfilter = $cgi->param('by_tag');
4070         for (my $i = $from; $i <= $to; $i++) {
4071                 my $pr = $projects[$i];
4072
4073                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4074                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4075                         and not $pr->{'descr_long'} =~ /$searchtext/;
4076                 # Weed out forks or non-matching entries of search
4077                 if ($check_forks) {
4078                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4079                         $forkbase="^$forkbase" if $forkbase;
4080                         next if not $searchtext and not $tagfilter and $show_ctags
4081                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4082                 }
4083
4084                 if ($alternate) {
4085                         print "<tr class=\"dark\">\n";
4086                 } else {
4087                         print "<tr class=\"light\">\n";
4088                 }
4089                 $alternate ^= 1;
4090                 if ($check_forks) {
4091                         print "<td>";
4092                         if ($pr->{'forks'}) {
4093                                 print "<!-- $pr->{'forks'} -->\n";
4094                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4095                         }
4096                         print "</td>\n";
4097                 }
4098                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4099                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4100                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4101                                         -class => "list", -title => $pr->{'descr_long'}},
4102                                         esc_html($pr->{'descr'})) . "</td>\n" .
4103                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4104                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4105                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4106                       "<td class=\"link\">" .
4107                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4108                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4109                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4110                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4111                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4112                       "</td>\n" .
4113                       "</tr>\n";
4114         }
4115         if (defined $extra) {
4116                 print "<tr>\n";
4117                 if ($check_forks) {
4118                         print "<td></td>\n";
4119                 }
4120                 print "<td colspan=\"5\">$extra</td>\n" .
4121                       "</tr>\n";
4122         }
4123         print "</table>\n";
4124 }
4125
4126 sub git_shortlog_body {
4127         # uses global variable $project
4128         my ($commitlist, $from, $to, $refs, $extra) = @_;
4129
4130         $from = 0 unless defined $from;
4131         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4132
4133         print "<table class=\"shortlog\">\n";
4134         my $alternate = 1;
4135         for (my $i = $from; $i <= $to; $i++) {
4136                 my %co = %{$commitlist->[$i]};
4137                 my $commit = $co{'id'};
4138                 my $ref = format_ref_marker($refs, $commit);
4139                 if ($alternate) {
4140                         print "<tr class=\"dark\">\n";
4141                 } else {
4142                         print "<tr class=\"light\">\n";
4143                 }
4144                 $alternate ^= 1;
4145                 my $author = chop_and_escape_str($co{'author_name'}, 10);
4146                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4147                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4148                       "<td><i>" . $author . "</i></td>\n" .
4149                       "<td>";
4150                 print format_subject_html($co{'title'}, $co{'title_short'},
4151                                           href(action=>"commit", hash=>$commit), $ref);
4152                 print "</td>\n" .
4153                       "<td class=\"link\">" .
4154                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4155                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4156                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4157                 my $snapshot_links = format_snapshot_links($commit);
4158                 if (defined $snapshot_links) {
4159                         print " | " . $snapshot_links;
4160                 }
4161                 print "</td>\n" .
4162                       "</tr>\n";
4163         }
4164         if (defined $extra) {
4165                 print "<tr>\n" .
4166                       "<td colspan=\"4\">$extra</td>\n" .
4167                       "</tr>\n";
4168         }
4169         print "</table>\n";
4170 }
4171
4172 sub git_history_body {
4173         # Warning: assumes constant type (blob or tree) during history
4174         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4175
4176         $from = 0 unless defined $from;
4177         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4178
4179         print "<table class=\"history\">\n";
4180         my $alternate = 1;
4181         for (my $i = $from; $i <= $to; $i++) {
4182                 my %co = %{$commitlist->[$i]};
4183                 if (!%co) {
4184                         next;
4185                 }
4186                 my $commit = $co{'id'};
4187
4188                 my $ref = format_ref_marker($refs, $commit);
4189
4190                 if ($alternate) {
4191                         print "<tr class=\"dark\">\n";
4192                 } else {
4193                         print "<tr class=\"light\">\n";
4194                 }
4195                 $alternate ^= 1;
4196         # shortlog uses      chop_str($co{'author_name'}, 10)
4197                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
4198                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4199                       "<td><i>" . $author . "</i></td>\n" .
4200                       "<td>";
4201                 # originally git_history used chop_str($co{'title'}, 50)
4202                 print format_subject_html($co{'title'}, $co{'title_short'},
4203                                           href(action=>"commit", hash=>$commit), $ref);
4204                 print "</td>\n" .
4205                       "<td class=\"link\">" .
4206                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4207                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4208
4209                 if ($ftype eq 'blob') {
4210                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4211                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4212                         if (defined $blob_current && defined $blob_parent &&
4213                                         $blob_current ne $blob_parent) {
4214                                 print " | " .
4215                                         $cgi->a({-href => href(action=>"blobdiff",
4216                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4217                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4218                                                                file_name=>$file_name)},
4219                                                 "diff to current");
4220                         }
4221                 }
4222                 print "</td>\n" .
4223                       "</tr>\n";
4224         }
4225         if (defined $extra) {
4226                 print "<tr>\n" .
4227                       "<td colspan=\"4\">$extra</td>\n" .
4228                       "</tr>\n";
4229         }
4230         print "</table>\n";
4231 }
4232
4233 sub git_tags_body {
4234         # uses global variable $project
4235         my ($taglist, $from, $to, $extra) = @_;
4236         $from = 0 unless defined $from;
4237         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4238
4239         print "<table class=\"tags\">\n";
4240         my $alternate = 1;
4241         for (my $i = $from; $i <= $to; $i++) {
4242                 my $entry = $taglist->[$i];
4243                 my %tag = %$entry;
4244                 my $comment = $tag{'subject'};
4245                 my $comment_short;
4246                 if (defined $comment) {
4247                         $comment_short = chop_str($comment, 30, 5);
4248                 }
4249                 if ($alternate) {
4250                         print "<tr class=\"dark\">\n";
4251                 } else {
4252                         print "<tr class=\"light\">\n";
4253                 }
4254                 $alternate ^= 1;
4255                 if (defined $tag{'age'}) {
4256                         print "<td><i>$tag{'age'}</i></td>\n";
4257                 } else {
4258                         print "<td></td>\n";
4259                 }
4260                 print "<td>" .
4261                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4262                                -class => "list name"}, esc_html($tag{'name'})) .
4263                       "</td>\n" .
4264                       "<td>";
4265                 if (defined $comment) {
4266                         print format_subject_html($comment, $comment_short,
4267                                                   href(action=>"tag", hash=>$tag{'id'}));
4268                 }
4269                 print "</td>\n" .
4270                       "<td class=\"selflink\">";
4271                 if ($tag{'type'} eq "tag") {
4272                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4273                 } else {
4274                         print "&nbsp;";
4275                 }
4276                 print "</td>\n" .
4277                       "<td class=\"link\">" . " | " .
4278                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4279                 if ($tag{'reftype'} eq "commit") {
4280                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4281                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4282                 } elsif ($tag{'reftype'} eq "blob") {
4283                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4284                 }
4285                 print "</td>\n" .
4286                       "</tr>";
4287         }
4288         if (defined $extra) {
4289                 print "<tr>\n" .
4290                       "<td colspan=\"5\">$extra</td>\n" .
4291                       "</tr>\n";
4292         }
4293         print "</table>\n";
4294 }
4295
4296 sub git_heads_body {
4297         # uses global variable $project
4298         my ($headlist, $head, $from, $to, $extra) = @_;
4299         $from = 0 unless defined $from;
4300         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4301
4302         print "<table class=\"heads\">\n";
4303         my $alternate = 1;
4304         for (my $i = $from; $i <= $to; $i++) {
4305                 my $entry = $headlist->[$i];
4306                 my %ref = %$entry;
4307                 my $curr = $ref{'id'} eq $head;
4308                 if ($alternate) {
4309                         print "<tr class=\"dark\">\n";
4310                 } else {
4311                         print "<tr class=\"light\">\n";
4312                 }
4313                 $alternate ^= 1;
4314                 print "<td><i>$ref{'age'}</i></td>\n" .
4315                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4316                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4317                                -class => "list name"},esc_html($ref{'name'})) .
4318                       "</td>\n" .
4319                       "<td class=\"link\">" .
4320                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4321                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4322                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4323                       "</td>\n" .
4324                       "</tr>";
4325         }
4326         if (defined $extra) {
4327                 print "<tr>\n" .
4328                       "<td colspan=\"3\">$extra</td>\n" .
4329                       "</tr>\n";
4330         }
4331         print "</table>\n";
4332 }
4333
4334 sub git_search_grep_body {
4335         my ($commitlist, $from, $to, $extra) = @_;
4336         $from = 0 unless defined $from;
4337         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4338
4339         print "<table class=\"commit_search\">\n";
4340         my $alternate = 1;
4341         for (my $i = $from; $i <= $to; $i++) {
4342                 my %co = %{$commitlist->[$i]};
4343                 if (!%co) {
4344                         next;
4345                 }
4346                 my $commit = $co{'id'};
4347                 if ($alternate) {
4348                         print "<tr class=\"dark\">\n";
4349                 } else {
4350                         print "<tr class=\"light\">\n";
4351                 }
4352                 $alternate ^= 1;
4353                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
4354                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4355                       "<td><i>" . $author . "</i></td>\n" .
4356                       "<td>" .
4357                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4358                                -class => "list subject"},
4359                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4360                 my $comment = $co{'comment'};
4361                 foreach my $line (@$comment) {
4362                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4363                                 my ($lead, $match, $trail) = ($1, $2, $3);
4364                                 $match = chop_str($match, 70, 5, 'center');
4365                                 my $contextlen = int((80 - length($match))/2);
4366                                 $contextlen = 30 if ($contextlen > 30);
4367                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4368                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4369
4370                                 $lead  = esc_html($lead);
4371                                 $match = esc_html($match);
4372                                 $trail = esc_html($trail);
4373
4374                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4375                         }
4376                 }
4377                 print "</td>\n" .
4378                       "<td class=\"link\">" .
4379                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4380                       " | " .
4381                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4382                       " | " .
4383                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4384                 print "</td>\n" .
4385                       "</tr>\n";
4386         }
4387         if (defined $extra) {
4388                 print "<tr>\n" .
4389                       "<td colspan=\"3\">$extra</td>\n" .
4390                       "</tr>\n";
4391         }
4392         print "</table>\n";
4393 }
4394
4395 ## ======================================================================
4396 ## ======================================================================
4397 ## actions
4398
4399 sub git_project_list {
4400         my $order = $input_params{'order'};
4401         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4402                 die_error(400, "Unknown order parameter");
4403         }
4404
4405         my @list = git_get_projects_list();
4406         if (!@list) {
4407                 die_error(404, "No projects found");
4408         }
4409
4410         git_header_html();
4411         if (-f $home_text) {
4412                 print "<div class=\"index_include\">\n";
4413                 insert_file($home_text);
4414                 print "</div>\n";
4415         }
4416         print $cgi->startform(-method => "get") .
4417               "<p class=\"projsearch\">Search:\n" .
4418               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4419               "</p>" .
4420               $cgi->end_form() . "\n";
4421         git_project_list_body(\@list, $order);
4422         git_footer_html();
4423 }
4424
4425 sub git_forks {
4426         my $order = $input_params{'order'};
4427         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4428                 die_error(400, "Unknown order parameter");
4429         }
4430
4431         my @list = git_get_projects_list($project);
4432         if (!@list) {
4433                 die_error(404, "No forks found");
4434         }
4435
4436         git_header_html();
4437         git_print_page_nav('','');
4438         git_print_header_div('summary', "$project forks");
4439         git_project_list_body(\@list, $order);
4440         git_footer_html();
4441 }
4442
4443 sub git_project_index {
4444         my @projects = git_get_projects_list($project);
4445
4446         print $cgi->header(
4447                 -type => 'text/plain',
4448                 -charset => 'utf-8',
4449                 -content_disposition => 'inline; filename="index.aux"');
4450
4451         foreach my $pr (@projects) {
4452                 if (!exists $pr->{'owner'}) {
4453                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4454                 }
4455
4456                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4457                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4458                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4459                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4460                 $path  =~ s/ /\+/g;
4461                 $owner =~ s/ /\+/g;
4462
4463                 print "$path $owner\n";
4464         }
4465 }
4466
4467 sub git_summary {
4468         my $descr = git_get_project_description($project) || "none";
4469         my %co = parse_commit("HEAD");
4470         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4471         my $head = $co{'id'};
4472
4473         my $owner = git_get_project_owner($project);
4474
4475         my $refs = git_get_references();
4476         # These get_*_list functions return one more to allow us to see if
4477         # there are more ...
4478         my @taglist  = git_get_tags_list(16);
4479         my @headlist = git_get_heads_list(16);
4480         my @forklist;
4481         my $check_forks = gitweb_check_feature('forks');
4482
4483         if ($check_forks) {
4484                 @forklist = git_get_projects_list($project);
4485         }
4486
4487         git_header_html();
4488         git_print_page_nav('summary','', $head);
4489
4490         print "<div class=\"title\">&nbsp;</div>\n";
4491         print "<table class=\"projects_list\">\n" .
4492               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4493               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4494         if (defined $cd{'rfc2822'}) {
4495                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4496         }
4497
4498         # use per project git URL list in $projectroot/$project/cloneurl
4499         # or make project git URL from git base URL and project name
4500         my $url_tag = "URL";
4501         my @url_list = git_get_project_url_list($project);
4502         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4503         foreach my $git_url (@url_list) {
4504                 next unless $git_url;
4505                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4506                 $url_tag = "";
4507         }
4508
4509         # Tag cloud
4510         my $show_ctags = gitweb_check_feature('ctags');
4511         if ($show_ctags) {
4512                 my $ctags = git_get_project_ctags($project);
4513                 my $cloud = git_populate_project_tagcloud($ctags);
4514                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4515                 print "</td>\n<td>" unless %$ctags;
4516                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4517                 print "</td>\n<td>" if %$ctags;
4518                 print git_show_project_tagcloud($cloud, 48);
4519                 print "</td></tr>";
4520         }
4521
4522         print "</table>\n";
4523
4524         # If XSS prevention is on, we don't include README.html.
4525         # TODO: Allow a readme in some safe format.
4526         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4527                 print "<div class=\"title\">readme</div>\n" .
4528                       "<div class=\"readme\">\n";
4529                 insert_file("$projectroot/$project/README.html");
4530                 print "\n</div>\n"; # class="readme"
4531         }
4532
4533         # we need to request one more than 16 (0..15) to check if
4534         # those 16 are all
4535         my @commitlist = $head ? parse_commits($head, 17) : ();
4536         if (@commitlist) {
4537                 git_print_header_div('shortlog');
4538                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4539                                   $#commitlist <=  15 ? undef :
4540                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4541         }
4542
4543         if (@taglist) {
4544                 git_print_header_div('tags');
4545                 git_tags_body(\@taglist, 0, 15,
4546                               $#taglist <=  15 ? undef :
4547                               $cgi->a({-href => href(action=>"tags")}, "..."));
4548         }
4549
4550         if (@headlist) {
4551                 git_print_header_div('heads');
4552                 git_heads_body(\@headlist, $head, 0, 15,
4553                                $#headlist <= 15 ? undef :
4554                                $cgi->a({-href => href(action=>"heads")}, "..."));
4555         }
4556
4557         if (@forklist) {
4558                 git_print_header_div('forks');
4559                 git_project_list_body(\@forklist, 'age', 0, 15,
4560                                       $#forklist <= 15 ? undef :
4561                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4562                                       'no_header');
4563         }
4564
4565         git_footer_html();
4566 }
4567
4568 sub git_tag {
4569         my $head = git_get_head_hash($project);
4570         git_header_html();
4571         git_print_page_nav('','', $head,undef,$head);
4572         my %tag = parse_tag($hash);
4573
4574         if (! %tag) {
4575                 die_error(404, "Unknown tag object");
4576         }
4577
4578         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4579         print "<div class=\"title_text\">\n" .
4580               "<table class=\"object_header\">\n" .
4581               "<tr>\n" .
4582               "<td>object</td>\n" .
4583               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4584                                $tag{'object'}) . "</td>\n" .
4585               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4586                                               $tag{'type'}) . "</td>\n" .
4587               "</tr>\n";
4588         if (defined($tag{'author'})) {
4589                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4590                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4591                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4592                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4593                         "</td></tr>\n";
4594         }
4595         print "</table>\n\n" .
4596               "</div>\n";
4597         print "<div class=\"page_body\">";
4598         my $comment = $tag{'comment'};
4599         foreach my $line (@$comment) {
4600                 chomp $line;
4601                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4602         }
4603         print "</div>\n";
4604         git_footer_html();
4605 }
4606
4607 sub git_blame {
4608         # permissions
4609         gitweb_check_feature('blame')
4610                 or die_error(403, "Blame view not allowed");
4611
4612         # error checking
4613         die_error(400, "No file name given") unless $file_name;
4614         $hash_base ||= git_get_head_hash($project);
4615         die_error(404, "Couldn't find base commit") unless $hash_base;
4616         my %co = parse_commit($hash_base)
4617                 or die_error(404, "Commit not found");
4618         my $ftype = "blob";
4619         if (!defined $hash) {
4620                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4621                         or die_error(404, "Error looking up file");
4622         } else {
4623                 $ftype = git_get_type($hash);
4624                 if ($ftype !~ "blob") {
4625                         die_error(400, "Object is not a blob");
4626                 }
4627         }
4628
4629         # run git-blame --porcelain
4630         open my $fd, "-|", git_cmd(), "blame", '-p',
4631                 $hash_base, '--', $file_name
4632                 or die_error(500, "Open git-blame failed");
4633
4634         # page header
4635         git_header_html();
4636         my $formats_nav =
4637                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4638                         "blob") .
4639                 " | " .
4640                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4641                         "history") .
4642                 " | " .
4643                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4644                         "HEAD");
4645         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4646         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4647         git_print_page_path($file_name, $ftype, $hash_base);
4648
4649         # page body
4650         my @rev_color = qw(light2 dark2);
4651         my $num_colors = scalar(@rev_color);
4652         my $current_color = 0;
4653         my %metainfo = ();
4654
4655         print <<HTML;
4656 <div class="page_body">
4657 <table class="blame">
4658 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4659 HTML
4660  LINE:
4661         while (my $line = <$fd>) {
4662                 chomp $line;
4663                 # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
4664                 # no <lines in group> for subsequent lines in group of lines
4665                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4666                    ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
4667                 if (!exists $metainfo{$full_rev}) {
4668                         $metainfo{$full_rev} = {};
4669                 }
4670                 my $meta = $metainfo{$full_rev};
4671                 my $data;
4672                 while ($data = <$fd>) {
4673                         chomp $data;
4674                         last if ($data =~ s/^\t//); # contents of line
4675                         if ($data =~ /^(\S+) (.*)$/) {
4676                                 $meta->{$1} = $2;
4677                         }
4678                 }
4679                 my $short_rev = substr($full_rev, 0, 8);
4680                 my $author = $meta->{'author'};
4681                 my %date =
4682                         parse_date($meta->{'author-time'}, $meta->{'author-tz'});
4683                 my $date = $date{'iso-tz'};
4684                 if ($group_size) {
4685                         $current_color = ($current_color + 1) % $num_colors;
4686                 }
4687                 print "<tr id=\"l$lineno\" class=\"$rev_color[$current_color]\">\n";
4688                 if ($group_size) {
4689                         print "<td class=\"sha1\"";
4690                         print " title=\"". esc_html($author) . ", $date\"";
4691                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4692                         print ">";
4693                         print $cgi->a({-href => href(action=>"commit",
4694                                                      hash=>$full_rev,
4695                                                      file_name=>$file_name)},
4696                                       esc_html($short_rev));
4697                         print "</td>\n";
4698                 }
4699                 my $parent_commit;
4700                 if (!exists $meta->{'parent'}) {
4701                         open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4702                                 or die_error(500, "Open git-rev-parse failed");
4703                         $parent_commit = <$dd>;
4704                         close $dd;
4705                         chomp($parent_commit);
4706                         $meta->{'parent'} = $parent_commit;
4707                 } else {
4708                         $parent_commit = $meta->{'parent'};
4709                 }
4710                 my $blamed = href(action => 'blame',
4711                                   file_name => $meta->{'filename'},
4712                                   hash_base => $parent_commit);
4713                 print "<td class=\"linenr\">";
4714                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4715                                 -class => "linenr" },
4716                               esc_html($lineno));
4717                 print "</td>";
4718                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4719                 print "</tr>\n";
4720         }
4721         print "</table>\n";
4722         print "</div>";
4723         close $fd
4724                 or print "Reading blob failed\n";
4725
4726         # page footer
4727         git_footer_html();
4728 }
4729
4730 sub git_tags {
4731         my $head = git_get_head_hash($project);
4732         git_header_html();
4733         git_print_page_nav('','', $head,undef,$head);
4734         git_print_header_div('summary', $project);
4735
4736         my @tagslist = git_get_tags_list();
4737         if (@tagslist) {
4738                 git_tags_body(\@tagslist);
4739         }
4740         git_footer_html();
4741 }
4742
4743 sub git_heads {
4744         my $head = git_get_head_hash($project);
4745         git_header_html();
4746         git_print_page_nav('','', $head,undef,$head);
4747         git_print_header_div('summary', $project);
4748
4749         my @headslist = git_get_heads_list();
4750         if (@headslist) {
4751                 git_heads_body(\@headslist, $head);
4752         }
4753         git_footer_html();
4754 }
4755
4756 sub git_blob_plain {
4757         my $type = shift;
4758         my $expires;
4759
4760         if (!defined $hash) {
4761                 if (defined $file_name) {
4762                         my $base = $hash_base || git_get_head_hash($project);
4763                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4764                                 or die_error(404, "Cannot find file");
4765                 } else {
4766                         die_error(400, "No file name defined");
4767                 }
4768         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4769                 # blobs defined by non-textual hash id's can be cached
4770                 $expires = "+1d";
4771         }
4772
4773         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4774                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4775
4776         # content-type (can include charset)
4777         $type = blob_contenttype($fd, $file_name, $type);
4778
4779         # "save as" filename, even when no $file_name is given
4780         my $save_as = "$hash";
4781         if (defined $file_name) {
4782                 $save_as = $file_name;
4783         } elsif ($type =~ m/^text\//) {
4784                 $save_as .= '.txt';
4785         }
4786
4787         # With XSS prevention on, blobs of all types except a few known safe
4788         # ones are served with "Content-Disposition: attachment" to make sure
4789         # they don't run in our security domain.  For certain image types,
4790         # blob view writes an <img> tag referring to blob_plain view, and we
4791         # want to be sure not to break that by serving the image as an
4792         # attachment (though Firefox 3 doesn't seem to care).
4793         my $sandbox = $prevent_xss &&
4794                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
4795
4796         print $cgi->header(
4797                 -type => $type,
4798                 -expires => $expires,
4799                 -content_disposition =>
4800                         ($sandbox ? 'attachment' : 'inline')
4801                         . '; filename="' . $save_as . '"');
4802         local $/ = undef;
4803         binmode STDOUT, ':raw';
4804         print <$fd>;
4805         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4806         close $fd;
4807 }
4808
4809 sub git_blob {
4810         my $expires;
4811
4812         if (!defined $hash) {
4813                 if (defined $file_name) {
4814                         my $base = $hash_base || git_get_head_hash($project);
4815                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4816                                 or die_error(404, "Cannot find file");
4817                 } else {
4818                         die_error(400, "No file name defined");
4819                 }
4820         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4821                 # blobs defined by non-textual hash id's can be cached
4822                 $expires = "+1d";
4823         }
4824
4825         my $have_blame = gitweb_check_feature('blame');
4826         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4827                 or die_error(500, "Couldn't cat $file_name, $hash");
4828         my $mimetype = blob_mimetype($fd, $file_name);
4829         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4830                 close $fd;
4831                 return git_blob_plain($mimetype);
4832         }
4833         # we can have blame only for text/* mimetype
4834         $have_blame &&= ($mimetype =~ m!^text/!);
4835
4836         git_header_html(undef, $expires);
4837         my $formats_nav = '';
4838         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4839                 if (defined $file_name) {
4840                         if ($have_blame) {
4841                                 $formats_nav .=
4842                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4843                                                 "blame") .
4844                                         " | ";
4845                         }
4846                         $formats_nav .=
4847                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4848                                         "history") .
4849                                 " | " .
4850                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4851                                         "raw") .
4852                                 " | " .
4853                                 $cgi->a({-href => href(action=>"blob",
4854                                                        hash_base=>"HEAD", file_name=>$file_name)},
4855                                         "HEAD");
4856                 } else {
4857                         $formats_nav .=
4858                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4859                                         "raw");
4860                 }
4861                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4862                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4863         } else {
4864                 print "<div class=\"page_nav\">\n" .
4865                       "<br/><br/></div>\n" .
4866                       "<div class=\"title\">$hash</div>\n";
4867         }
4868         git_print_page_path($file_name, "blob", $hash_base);
4869         print "<div class=\"page_body\">\n";
4870         if ($mimetype =~ m!^image/!) {
4871                 print qq!<img type="$mimetype"!;
4872                 if ($file_name) {
4873                         print qq! alt="$file_name" title="$file_name"!;
4874                 }
4875                 print qq! src="! .
4876                       href(action=>"blob_plain", hash=>$hash,
4877                            hash_base=>$hash_base, file_name=>$file_name) .
4878                       qq!" />\n!;
4879         } else {
4880                 my $nr;
4881                 while (my $line = <$fd>) {
4882                         chomp $line;
4883                         $nr++;
4884                         $line = untabify($line);
4885                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4886                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4887                 }
4888         }
4889         close $fd
4890                 or print "Reading blob failed.\n";
4891         print "</div>";
4892         git_footer_html();
4893 }
4894
4895 sub git_tree {
4896         if (!defined $hash_base) {
4897                 $hash_base = "HEAD";
4898         }
4899         if (!defined $hash) {
4900                 if (defined $file_name) {
4901                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4902                 } else {
4903                         $hash = $hash_base;
4904                 }
4905         }
4906         die_error(404, "No such tree") unless defined($hash);
4907
4908         my @entries = ();
4909         {
4910                 local $/ = "\0";
4911                 open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4912                         or die_error(500, "Open git-ls-tree failed");
4913                 @entries = map { chomp; $_ } <$fd>;
4914                 close $fd
4915                         or die_error(404, "Reading tree failed");
4916         }
4917
4918         my $refs = git_get_references();
4919         my $ref = format_ref_marker($refs, $hash_base);
4920         git_header_html();
4921         my $basedir = '';
4922         my $have_blame = gitweb_check_feature('blame');
4923         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4924                 my @views_nav = ();
4925                 if (defined $file_name) {
4926                         push @views_nav,
4927                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4928                                         "history"),
4929                                 $cgi->a({-href => href(action=>"tree",
4930                                                        hash_base=>"HEAD", file_name=>$file_name)},
4931                                         "HEAD"),
4932                 }
4933                 my $snapshot_links = format_snapshot_links($hash);
4934                 if (defined $snapshot_links) {
4935                         # FIXME: Should be available when we have no hash base as well.
4936                         push @views_nav, $snapshot_links;
4937                 }
4938                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4939                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4940         } else {
4941                 undef $hash_base;
4942                 print "<div class=\"page_nav\">\n";
4943                 print "<br/><br/></div>\n";
4944                 print "<div class=\"title\">$hash</div>\n";
4945         }
4946         if (defined $file_name) {
4947                 $basedir = $file_name;
4948                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4949                         $basedir .= '/';
4950                 }
4951                 git_print_page_path($file_name, 'tree', $hash_base);
4952         }
4953         print "<div class=\"page_body\">\n";
4954         print "<table class=\"tree\">\n";
4955         my $alternate = 1;
4956         # '..' (top directory) link if possible
4957         if (defined $hash_base &&
4958             defined $file_name && $file_name =~ m![^/]+$!) {
4959                 if ($alternate) {
4960                         print "<tr class=\"dark\">\n";
4961                 } else {
4962                         print "<tr class=\"light\">\n";
4963                 }
4964                 $alternate ^= 1;
4965
4966                 my $up = $file_name;
4967                 $up =~ s!/?[^/]+$!!;
4968                 undef $up unless $up;
4969                 # based on git_print_tree_entry
4970                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4971                 print '<td class="list">';
4972                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4973                                              file_name=>$up)},
4974                               "..");
4975                 print "</td>\n";
4976                 print "<td class=\"link\"></td>\n";
4977
4978                 print "</tr>\n";
4979         }
4980         foreach my $line (@entries) {
4981                 my %t = parse_ls_tree_line($line, -z => 1);
4982
4983                 if ($alternate) {
4984                         print "<tr class=\"dark\">\n";
4985                 } else {
4986                         print "<tr class=\"light\">\n";
4987                 }
4988                 $alternate ^= 1;
4989
4990                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4991
4992                 print "</tr>\n";
4993         }
4994         print "</table>\n" .
4995               "</div>";
4996         git_footer_html();
4997 }
4998
4999 sub git_snapshot {
5000         my $format = $input_params{'snapshot_format'};
5001         if (!@snapshot_fmts) {
5002                 die_error(403, "Snapshots not allowed");
5003         }
5004         # default to first supported snapshot format
5005         $format ||= $snapshot_fmts[0];
5006         if ($format !~ m/^[a-z0-9]+$/) {
5007                 die_error(400, "Invalid snapshot format parameter");
5008         } elsif (!exists($known_snapshot_formats{$format})) {
5009                 die_error(400, "Unknown snapshot format");
5010         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5011                 die_error(403, "Unsupported snapshot format");
5012         }
5013
5014         if (!defined $hash) {
5015                 $hash = git_get_head_hash($project);
5016         }
5017
5018         my $name = $project;
5019         $name =~ s,([^/])/*\.git$,$1,;
5020         $name = basename($name);
5021         my $filename = to_utf8($name);
5022         $name =~ s/\047/\047\\\047\047/g;
5023         my $cmd;
5024         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
5025         $cmd = quote_command(
5026                 git_cmd(), 'archive',
5027                 "--format=$known_snapshot_formats{$format}{'format'}",
5028                 "--prefix=$name/", $hash);
5029         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5030                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5031         }
5032
5033         print $cgi->header(
5034                 -type => $known_snapshot_formats{$format}{'type'},
5035                 -content_disposition => 'inline; filename="' . "$filename" . '"',
5036                 -status => '200 OK');
5037
5038         open my $fd, "-|", $cmd
5039                 or die_error(500, "Execute git-archive failed");
5040         binmode STDOUT, ':raw';
5041         print <$fd>;
5042         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5043         close $fd;
5044 }
5045
5046 sub git_log {
5047         my $head = git_get_head_hash($project);
5048         if (!defined $hash) {
5049                 $hash = $head;
5050         }
5051         if (!defined $page) {
5052                 $page = 0;
5053         }
5054         my $refs = git_get_references();
5055
5056         my @commitlist = parse_commits($hash, 101, (100 * $page));
5057
5058         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
5059
5060         my ($patch_max) = gitweb_get_feature('patches');
5061         if ($patch_max) {
5062                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5063                         $paging_nav .= " &sdot; " .
5064                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5065                                         "patches");
5066                 }
5067         }
5068
5069         git_header_html();
5070         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5071
5072         if (!@commitlist) {
5073                 my %co = parse_commit($hash);
5074
5075                 git_print_header_div('summary', $project);
5076                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5077         }
5078         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5079         for (my $i = 0; $i <= $to; $i++) {
5080                 my %co = %{$commitlist[$i]};
5081                 next if !%co;
5082                 my $commit = $co{'id'};
5083                 my $ref = format_ref_marker($refs, $commit);
5084                 my %ad = parse_date($co{'author_epoch'});
5085                 git_print_header_div('commit',
5086                                "<span class=\"age\">$co{'age_string'}</span>" .
5087                                esc_html($co{'title'}) . $ref,
5088                                $commit);
5089                 print "<div class=\"title_text\">\n" .
5090                       "<div class=\"log_link\">\n" .
5091                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5092                       " | " .
5093                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5094                       " | " .
5095                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5096                       "<br/>\n" .
5097                       "</div>\n" .
5098                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
5099                       "</div>\n";
5100
5101                 print "<div class=\"log_body\">\n";
5102                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5103                 print "</div>\n";
5104         }
5105         if ($#commitlist >= 100) {
5106                 print "<div class=\"page_nav\">\n";
5107                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5108                                -accesskey => "n", -title => "Alt-n"}, "next");
5109                 print "</div>\n";
5110         }
5111         git_footer_html();
5112 }
5113
5114 sub git_commit {
5115         $hash ||= $hash_base || "HEAD";
5116         my %co = parse_commit($hash)
5117             or die_error(404, "Unknown commit object");
5118         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5119         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
5120
5121         my $parent  = $co{'parent'};
5122         my $parents = $co{'parents'}; # listref
5123
5124         # we need to prepare $formats_nav before any parameter munging
5125         my $formats_nav;
5126         if (!defined $parent) {
5127                 # --root commitdiff
5128                 $formats_nav .= '(initial)';
5129         } elsif (@$parents == 1) {
5130                 # single parent commit
5131                 $formats_nav .=
5132                         '(parent: ' .
5133                         $cgi->a({-href => href(action=>"commit",
5134                                                hash=>$parent)},
5135                                 esc_html(substr($parent, 0, 7))) .
5136                         ')';
5137         } else {
5138                 # merge commit
5139                 $formats_nav .=
5140                         '(merge: ' .
5141                         join(' ', map {
5142                                 $cgi->a({-href => href(action=>"commit",
5143                                                        hash=>$_)},
5144                                         esc_html(substr($_, 0, 7)));
5145                         } @$parents ) .
5146                         ')';
5147         }
5148         if (gitweb_check_feature('patches')) {
5149                 $formats_nav .= " | " .
5150                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5151                                 "patch");
5152         }
5153
5154         if (!defined $parent) {
5155                 $parent = "--root";
5156         }
5157         my @difftree;
5158         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5159                 @diff_opts,
5160                 (@$parents <= 1 ? $parent : '-c'),
5161                 $hash, "--"
5162                 or die_error(500, "Open git-diff-tree failed");
5163         @difftree = map { chomp; $_ } <$fd>;
5164         close $fd or die_error(404, "Reading git-diff-tree failed");
5165
5166         # non-textual hash id's can be cached
5167         my $expires;
5168         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5169                 $expires = "+1d";
5170         }
5171         my $refs = git_get_references();
5172         my $ref = format_ref_marker($refs, $co{'id'});
5173
5174         git_header_html(undef, $expires);
5175         git_print_page_nav('commit', '',
5176                            $hash, $co{'tree'}, $hash,
5177                            $formats_nav);
5178
5179         if (defined $co{'parent'}) {
5180                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5181         } else {
5182                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5183         }
5184         print "<div class=\"title_text\">\n" .
5185               "<table class=\"object_header\">\n";
5186         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
5187               "<tr>" .
5188               "<td></td><td> $ad{'rfc2822'}";
5189         if ($ad{'hour_local'} < 6) {
5190                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
5191                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5192         } else {
5193                 printf(" (%02d:%02d %s)",
5194                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5195         }
5196         print "</td>" .
5197               "</tr>\n";
5198         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
5199         print "<tr><td></td><td> $cd{'rfc2822'}" .
5200               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
5201               "</td></tr>\n";
5202         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5203         print "<tr>" .
5204               "<td>tree</td>" .
5205               "<td class=\"sha1\">" .
5206               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5207                        class => "list"}, $co{'tree'}) .
5208               "</td>" .
5209               "<td class=\"link\">" .
5210               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5211                       "tree");
5212         my $snapshot_links = format_snapshot_links($hash);
5213         if (defined $snapshot_links) {
5214                 print " | " . $snapshot_links;
5215         }
5216         print "</td>" .
5217               "</tr>\n";
5218
5219         foreach my $par (@$parents) {
5220                 print "<tr>" .
5221                       "<td>parent</td>" .
5222                       "<td class=\"sha1\">" .
5223                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5224                                class => "list"}, $par) .
5225                       "</td>" .
5226                       "<td class=\"link\">" .
5227                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5228                       " | " .
5229                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5230                       "</td>" .
5231                       "</tr>\n";
5232         }
5233         print "</table>".
5234               "</div>\n";
5235
5236         print "<div class=\"page_body\">\n";
5237         git_print_log($co{'comment'});
5238         print "</div>\n";
5239
5240         git_difftree_body(\@difftree, $hash, @$parents);
5241
5242         git_footer_html();
5243 }
5244
5245 sub git_object {
5246         # object is defined by:
5247         # - hash or hash_base alone
5248         # - hash_base and file_name
5249         my $type;
5250
5251         # - hash or hash_base alone
5252         if ($hash || ($hash_base && !defined $file_name)) {
5253                 my $object_id = $hash || $hash_base;
5254
5255                 open my $fd, "-|", quote_command(
5256                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5257                         or die_error(404, "Object does not exist");
5258                 $type = <$fd>;
5259                 chomp $type;
5260                 close $fd
5261                         or die_error(404, "Object does not exist");
5262
5263         # - hash_base and file_name
5264         } elsif ($hash_base && defined $file_name) {
5265                 $file_name =~ s,/+$,,;
5266
5267                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5268                         or die_error(404, "Base object does not exist");
5269
5270                 # here errors should not hapen
5271                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5272                         or die_error(500, "Open git-ls-tree failed");
5273                 my $line = <$fd>;
5274                 close $fd;
5275
5276                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5277                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5278                         die_error(404, "File or directory for given base does not exist");
5279                 }
5280                 $type = $2;
5281                 $hash = $3;
5282         } else {
5283                 die_error(400, "Not enough information to find object");
5284         }
5285
5286         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5287                                           hash=>$hash, hash_base=>$hash_base,
5288                                           file_name=>$file_name),
5289                              -status => '302 Found');
5290 }
5291
5292 sub git_blobdiff {
5293         my $format = shift || 'html';
5294
5295         my $fd;
5296         my @difftree;
5297         my %diffinfo;
5298         my $expires;
5299
5300         # preparing $fd and %diffinfo for git_patchset_body
5301         # new style URI
5302         if (defined $hash_base && defined $hash_parent_base) {
5303                 if (defined $file_name) {
5304                         # read raw output
5305                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5306                                 $hash_parent_base, $hash_base,
5307                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5308                                 or die_error(500, "Open git-diff-tree failed");
5309                         @difftree = map { chomp; $_ } <$fd>;
5310                         close $fd
5311                                 or die_error(404, "Reading git-diff-tree failed");
5312                         @difftree
5313                                 or die_error(404, "Blob diff not found");
5314
5315                 } elsif (defined $hash &&
5316                          $hash =~ /[0-9a-fA-F]{40}/) {
5317                         # try to find filename from $hash
5318
5319                         # read filtered raw output
5320                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5321                                 $hash_parent_base, $hash_base, "--"
5322                                 or die_error(500, "Open git-diff-tree failed");
5323                         @difftree =
5324                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5325                                 # $hash == to_id
5326                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5327                                 map { chomp; $_ } <$fd>;
5328                         close $fd
5329                                 or die_error(404, "Reading git-diff-tree failed");
5330                         @difftree
5331                                 or die_error(404, "Blob diff not found");
5332
5333                 } else {
5334                         die_error(400, "Missing one of the blob diff parameters");
5335                 }
5336
5337                 if (@difftree > 1) {
5338                         die_error(400, "Ambiguous blob diff specification");
5339                 }
5340
5341                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5342                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5343                 $file_name   ||= $diffinfo{'to_file'};
5344
5345                 $hash_parent ||= $diffinfo{'from_id'};
5346                 $hash        ||= $diffinfo{'to_id'};
5347
5348                 # non-textual hash id's can be cached
5349                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5350                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5351                         $expires = '+1d';
5352                 }
5353
5354                 # open patch output
5355                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5356                         '-p', ($format eq 'html' ? "--full-index" : ()),
5357                         $hash_parent_base, $hash_base,
5358                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5359                         or die_error(500, "Open git-diff-tree failed");
5360         }
5361
5362         # old/legacy style URI -- not generated anymore since 1.4.3.
5363         if (!%diffinfo) {
5364                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5365         }
5366
5367         # header
5368         if ($format eq 'html') {
5369                 my $formats_nav =
5370                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5371                                 "raw");
5372                 git_header_html(undef, $expires);
5373                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5374                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5375                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5376                 } else {
5377                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5378                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5379                 }
5380                 if (defined $file_name) {
5381                         git_print_page_path($file_name, "blob", $hash_base);
5382                 } else {
5383                         print "<div class=\"page_path\"></div>\n";
5384                 }
5385
5386         } elsif ($format eq 'plain') {
5387                 print $cgi->header(
5388                         -type => 'text/plain',
5389                         -charset => 'utf-8',
5390                         -expires => $expires,
5391                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5392
5393                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5394
5395         } else {
5396                 die_error(400, "Unknown blobdiff format");
5397         }
5398
5399         # patch
5400         if ($format eq 'html') {
5401                 print "<div class=\"page_body\">\n";
5402
5403                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5404                 close $fd;
5405
5406                 print "</div>\n"; # class="page_body"
5407                 git_footer_html();
5408
5409         } else {
5410                 while (my $line = <$fd>) {
5411                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5412                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5413
5414                         print $line;
5415
5416                         last if $line =~ m!^\+\+\+!;
5417                 }
5418                 local $/ = undef;
5419                 print <$fd>;
5420                 close $fd;
5421         }
5422 }
5423
5424 sub git_blobdiff_plain {
5425         git_blobdiff('plain');
5426 }
5427
5428 sub git_commitdiff {
5429         my %params = @_;
5430         my $format = $params{-format} || 'html';
5431
5432         my ($patch_max) = gitweb_get_feature('patches');
5433         if ($format eq 'patch') {
5434                 die_error(403, "Patch view not allowed") unless $patch_max;
5435         }
5436
5437         $hash ||= $hash_base || "HEAD";
5438         my %co = parse_commit($hash)
5439             or die_error(404, "Unknown commit object");
5440
5441         # choose format for commitdiff for merge
5442         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5443                 $hash_parent = '--cc';
5444         }
5445         # we need to prepare $formats_nav before almost any parameter munging
5446         my $formats_nav;
5447         if ($format eq 'html') {
5448                 $formats_nav =
5449                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5450                                 "raw");
5451                 if ($patch_max) {
5452                         $formats_nav .= " | " .
5453                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5454                                         "patch");
5455                 }
5456
5457                 if (defined $hash_parent &&
5458                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5459                         # commitdiff with two commits given
5460                         my $hash_parent_short = $hash_parent;
5461                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5462                                 $hash_parent_short = substr($hash_parent, 0, 7);
5463                         }
5464                         $formats_nav .=
5465                                 ' (from';
5466                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5467                                 if ($co{'parents'}[$i] eq $hash_parent) {
5468                                         $formats_nav .= ' parent ' . ($i+1);
5469                                         last;
5470                                 }
5471                         }
5472                         $formats_nav .= ': ' .
5473                                 $cgi->a({-href => href(action=>"commitdiff",
5474                                                        hash=>$hash_parent)},
5475                                         esc_html($hash_parent_short)) .
5476                                 ')';
5477                 } elsif (!$co{'parent'}) {
5478                         # --root commitdiff
5479                         $formats_nav .= ' (initial)';
5480                 } elsif (scalar @{$co{'parents'}} == 1) {
5481                         # single parent commit
5482                         $formats_nav .=
5483                                 ' (parent: ' .
5484                                 $cgi->a({-href => href(action=>"commitdiff",
5485                                                        hash=>$co{'parent'})},
5486                                         esc_html(substr($co{'parent'}, 0, 7))) .
5487                                 ')';
5488                 } else {
5489                         # merge commit
5490                         if ($hash_parent eq '--cc') {
5491                                 $formats_nav .= ' | ' .
5492                                         $cgi->a({-href => href(action=>"commitdiff",
5493                                                                hash=>$hash, hash_parent=>'-c')},
5494                                                 'combined');
5495                         } else { # $hash_parent eq '-c'
5496                                 $formats_nav .= ' | ' .
5497                                         $cgi->a({-href => href(action=>"commitdiff",
5498                                                                hash=>$hash, hash_parent=>'--cc')},
5499                                                 'compact');
5500                         }
5501                         $formats_nav .=
5502                                 ' (merge: ' .
5503                                 join(' ', map {
5504                                         $cgi->a({-href => href(action=>"commitdiff",
5505                                                                hash=>$_)},
5506                                                 esc_html(substr($_, 0, 7)));
5507                                 } @{$co{'parents'}} ) .
5508                                 ')';
5509                 }
5510         }
5511
5512         my $hash_parent_param = $hash_parent;
5513         if (!defined $hash_parent_param) {
5514                 # --cc for multiple parents, --root for parentless
5515                 $hash_parent_param =
5516                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5517         }
5518
5519         # read commitdiff
5520         my $fd;
5521         my @difftree;
5522         if ($format eq 'html') {
5523                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5524                         "--no-commit-id", "--patch-with-raw", "--full-index",
5525                         $hash_parent_param, $hash, "--"
5526                         or die_error(500, "Open git-diff-tree failed");
5527
5528                 while (my $line = <$fd>) {
5529                         chomp $line;
5530                         # empty line ends raw part of diff-tree output
5531                         last unless $line;
5532                         push @difftree, scalar parse_difftree_raw_line($line);
5533                 }
5534
5535         } elsif ($format eq 'plain') {
5536                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5537                         '-p', $hash_parent_param, $hash, "--"
5538                         or die_error(500, "Open git-diff-tree failed");
5539         } elsif ($format eq 'patch') {
5540                 # For commit ranges, we limit the output to the number of
5541                 # patches specified in the 'patches' feature.
5542                 # For single commits, we limit the output to a single patch,
5543                 # diverging from the git-format-patch default.
5544                 my @commit_spec = ();
5545                 if ($hash_parent) {
5546                         if ($patch_max > 0) {
5547                                 push @commit_spec, "-$patch_max";
5548                         }
5549                         push @commit_spec, '-n', "$hash_parent..$hash";
5550                 } else {
5551                         if ($params{-single}) {
5552                                 push @commit_spec, '-1';
5553                         } else {
5554                                 if ($patch_max > 0) {
5555                                         push @commit_spec, "-$patch_max";
5556                                 }
5557                                 push @commit_spec, "-n";
5558                         }
5559                         push @commit_spec, '--root', $hash;
5560                 }
5561                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5562                         '--stdout', @commit_spec
5563                         or die_error(500, "Open git-format-patch failed");
5564         } else {
5565                 die_error(400, "Unknown commitdiff format");
5566         }
5567
5568         # non-textual hash id's can be cached
5569         my $expires;
5570         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5571                 $expires = "+1d";
5572         }
5573
5574         # write commit message
5575         if ($format eq 'html') {
5576                 my $refs = git_get_references();
5577                 my $ref = format_ref_marker($refs, $co{'id'});
5578
5579                 git_header_html(undef, $expires);
5580                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5581                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5582                 git_print_authorship(\%co);
5583                 print "<div class=\"page_body\">\n";
5584                 if (@{$co{'comment'}} > 1) {
5585                         print "<div class=\"log\">\n";
5586                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5587                         print "</div>\n"; # class="log"
5588                 }
5589
5590         } elsif ($format eq 'plain') {
5591                 my $refs = git_get_references("tags");
5592                 my $tagname = git_get_rev_name_tags($hash);
5593                 my $filename = basename($project) . "-$hash.patch";
5594
5595                 print $cgi->header(
5596                         -type => 'text/plain',
5597                         -charset => 'utf-8',
5598                         -expires => $expires,
5599                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5600                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5601                 print "From: " . to_utf8($co{'author'}) . "\n";
5602                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5603                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5604
5605                 print "X-Git-Tag: $tagname\n" if $tagname;
5606                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5607
5608                 foreach my $line (@{$co{'comment'}}) {
5609                         print to_utf8($line) . "\n";
5610                 }
5611                 print "---\n\n";
5612         } elsif ($format eq 'patch') {
5613                 my $filename = basename($project) . "-$hash.patch";
5614
5615                 print $cgi->header(
5616                         -type => 'text/plain',
5617                         -charset => 'utf-8',
5618                         -expires => $expires,
5619                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5620         }
5621
5622         # write patch
5623         if ($format eq 'html') {
5624                 my $use_parents = !defined $hash_parent ||
5625                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5626                 git_difftree_body(\@difftree, $hash,
5627                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5628                 print "<br/>\n";
5629
5630                 git_patchset_body($fd, \@difftree, $hash,
5631                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5632                 close $fd;
5633                 print "</div>\n"; # class="page_body"
5634                 git_footer_html();
5635
5636         } elsif ($format eq 'plain') {
5637                 local $/ = undef;
5638                 print <$fd>;
5639                 close $fd
5640                         or print "Reading git-diff-tree failed\n";
5641         } elsif ($format eq 'patch') {
5642                 local $/ = undef;
5643                 print <$fd>;
5644                 close $fd
5645                         or print "Reading git-format-patch failed\n";
5646         }
5647 }
5648
5649 sub git_commitdiff_plain {
5650         git_commitdiff(-format => 'plain');
5651 }
5652
5653 # format-patch-style patches
5654 sub git_patch {
5655         git_commitdiff(-format => 'patch', -single=> 1);
5656 }
5657
5658 sub git_patches {
5659         git_commitdiff(-format => 'patch');
5660 }
5661
5662 sub git_history {
5663         if (!defined $hash_base) {
5664                 $hash_base = git_get_head_hash($project);
5665         }
5666         if (!defined $page) {
5667                 $page = 0;
5668         }
5669         my $ftype;
5670         my %co = parse_commit($hash_base)
5671             or die_error(404, "Unknown commit object");
5672
5673         my $refs = git_get_references();
5674         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5675
5676         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5677                                        $file_name, "--full-history")
5678             or die_error(404, "No such file or directory on given branch");
5679
5680         if (!defined $hash && defined $file_name) {
5681                 # some commits could have deleted file in question,
5682                 # and not have it in tree, but one of them has to have it
5683                 for (my $i = 0; $i <= @commitlist; $i++) {
5684                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5685                         last if defined $hash;
5686                 }
5687         }
5688         if (defined $hash) {
5689                 $ftype = git_get_type($hash);
5690         }
5691         if (!defined $ftype) {
5692                 die_error(500, "Unknown type of object");
5693         }
5694
5695         my $paging_nav = '';
5696         if ($page > 0) {
5697                 $paging_nav .=
5698                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5699                                                file_name=>$file_name)},
5700                                 "first");
5701                 $paging_nav .= " &sdot; " .
5702                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5703                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5704         } else {
5705                 $paging_nav .= "first";
5706                 $paging_nav .= " &sdot; prev";
5707         }
5708         my $next_link = '';
5709         if ($#commitlist >= 100) {
5710                 $next_link =
5711                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5712                                  -accesskey => "n", -title => "Alt-n"}, "next");
5713                 $paging_nav .= " &sdot; $next_link";
5714         } else {
5715                 $paging_nav .= " &sdot; next";
5716         }
5717
5718         git_header_html();
5719         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5720         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5721         git_print_page_path($file_name, $ftype, $hash_base);
5722
5723         git_history_body(\@commitlist, 0, 99,
5724                          $refs, $hash_base, $ftype, $next_link);
5725
5726         git_footer_html();
5727 }
5728
5729 sub git_search {
5730         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5731         if (!defined $searchtext) {
5732                 die_error(400, "Text field is empty");
5733         }
5734         if (!defined $hash) {
5735                 $hash = git_get_head_hash($project);
5736         }
5737         my %co = parse_commit($hash);
5738         if (!%co) {
5739                 die_error(404, "Unknown commit object");
5740         }
5741         if (!defined $page) {
5742                 $page = 0;
5743         }
5744
5745         $searchtype ||= 'commit';
5746         if ($searchtype eq 'pickaxe') {
5747                 # pickaxe may take all resources of your box and run for several minutes
5748                 # with every query - so decide by yourself how public you make this feature
5749                 gitweb_check_feature('pickaxe')
5750                     or die_error(403, "Pickaxe is disabled");
5751         }
5752         if ($searchtype eq 'grep') {
5753                 gitweb_check_feature('grep')
5754                     or die_error(403, "Grep is disabled");
5755         }
5756
5757         git_header_html();
5758
5759         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5760                 my $greptype;
5761                 if ($searchtype eq 'commit') {
5762                         $greptype = "--grep=";
5763                 } elsif ($searchtype eq 'author') {
5764                         $greptype = "--author=";
5765                 } elsif ($searchtype eq 'committer') {
5766                         $greptype = "--committer=";
5767                 }
5768                 $greptype .= $searchtext;
5769                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5770                                                $greptype, '--regexp-ignore-case',
5771                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5772
5773                 my $paging_nav = '';
5774                 if ($page > 0) {
5775                         $paging_nav .=
5776                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5777                                                        searchtext=>$searchtext,
5778                                                        searchtype=>$searchtype)},
5779                                         "first");
5780                         $paging_nav .= " &sdot; " .
5781                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5782                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5783                 } else {
5784                         $paging_nav .= "first";
5785                         $paging_nav .= " &sdot; prev";
5786                 }
5787                 my $next_link = '';
5788                 if ($#commitlist >= 100) {
5789                         $next_link =
5790                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5791                                          -accesskey => "n", -title => "Alt-n"}, "next");
5792                         $paging_nav .= " &sdot; $next_link";
5793                 } else {
5794                         $paging_nav .= " &sdot; next";
5795                 }
5796
5797                 if ($#commitlist >= 100) {
5798                 }
5799
5800                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5801                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5802                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5803         }
5804
5805         if ($searchtype eq 'pickaxe') {
5806                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5807                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5808
5809                 print "<table class=\"pickaxe search\">\n";
5810                 my $alternate = 1;
5811                 local $/ = "\n";
5812                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5813                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5814                         ($search_use_regexp ? '--pickaxe-regex' : ());
5815                 undef %co;
5816                 my @files;
5817                 while (my $line = <$fd>) {
5818                         chomp $line;
5819                         next unless $line;
5820
5821                         my %set = parse_difftree_raw_line($line);
5822                         if (defined $set{'commit'}) {
5823                                 # finish previous commit
5824                                 if (%co) {
5825                                         print "</td>\n" .
5826                                               "<td class=\"link\">" .
5827                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5828                                               " | " .
5829                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5830                                         print "</td>\n" .
5831                                               "</tr>\n";
5832                                 }
5833
5834                                 if ($alternate) {
5835                                         print "<tr class=\"dark\">\n";
5836                                 } else {
5837                                         print "<tr class=\"light\">\n";
5838                                 }
5839                                 $alternate ^= 1;
5840                                 %co = parse_commit($set{'commit'});
5841                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5842                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5843                                       "<td><i>$author</i></td>\n" .
5844                                       "<td>" .
5845                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5846                                               -class => "list subject"},
5847                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5848                         } elsif (defined $set{'to_id'}) {
5849                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5850
5851                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5852                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5853                                               -class => "list"},
5854                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5855                                       "<br/>\n";
5856                         }
5857                 }
5858                 close $fd;
5859
5860                 # finish last commit (warning: repetition!)
5861                 if (%co) {
5862                         print "</td>\n" .
5863                               "<td class=\"link\">" .
5864                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5865                               " | " .
5866                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5867                         print "</td>\n" .
5868                               "</tr>\n";
5869                 }
5870
5871                 print "</table>\n";
5872         }
5873
5874         if ($searchtype eq 'grep') {
5875                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5876                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5877
5878                 print "<table class=\"grep_search\">\n";
5879                 my $alternate = 1;
5880                 my $matches = 0;
5881                 local $/ = "\n";
5882                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5883                         $search_use_regexp ? ('-E', '-i') : '-F',
5884                         $searchtext, $co{'tree'};
5885                 my $lastfile = '';
5886                 while (my $line = <$fd>) {
5887                         chomp $line;
5888                         my ($file, $lno, $ltext, $binary);
5889                         last if ($matches++ > 1000);
5890                         if ($line =~ /^Binary file (.+) matches$/) {
5891                                 $file = $1;
5892                                 $binary = 1;
5893                         } else {
5894                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5895                         }
5896                         if ($file ne $lastfile) {
5897                                 $lastfile and print "</td></tr>\n";
5898                                 if ($alternate++) {
5899                                         print "<tr class=\"dark\">\n";
5900                                 } else {
5901                                         print "<tr class=\"light\">\n";
5902                                 }
5903                                 print "<td class=\"list\">".
5904                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5905                                                                file_name=>"$file"),
5906                                                 -class => "list"}, esc_path($file));
5907                                 print "</td><td>\n";
5908                                 $lastfile = $file;
5909                         }
5910                         if ($binary) {
5911                                 print "<div class=\"binary\">Binary file</div>\n";
5912                         } else {
5913                                 $ltext = untabify($ltext);
5914                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5915                                         $ltext = esc_html($1, -nbsp=>1);
5916                                         $ltext .= '<span class="match">';
5917                                         $ltext .= esc_html($2, -nbsp=>1);
5918                                         $ltext .= '</span>';
5919                                         $ltext .= esc_html($3, -nbsp=>1);
5920                                 } else {
5921                                         $ltext = esc_html($ltext, -nbsp=>1);
5922                                 }
5923                                 print "<div class=\"pre\">" .
5924                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5925                                                                file_name=>"$file").'#l'.$lno,
5926                                                 -class => "linenr"}, sprintf('%4i', $lno))
5927                                         . ' ' .  $ltext . "</div>\n";
5928                         }
5929                 }
5930                 if ($lastfile) {
5931                         print "</td></tr>\n";
5932                         if ($matches > 1000) {
5933                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5934                         }
5935                 } else {
5936                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5937                 }
5938                 close $fd;
5939
5940                 print "</table>\n";
5941         }
5942         git_footer_html();
5943 }
5944
5945 sub git_search_help {
5946         git_header_html();
5947         git_print_page_nav('','', $hash,$hash,$hash);
5948         print <<EOT;
5949 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5950 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5951 the pattern entered is recognized as the POSIX extended
5952 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5953 insensitive).</p>
5954 <dl>
5955 <dt><b>commit</b></dt>
5956 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5957 EOT
5958         my $have_grep = gitweb_check_feature('grep');
5959         if ($have_grep) {
5960                 print <<EOT;
5961 <dt><b>grep</b></dt>
5962 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5963     a different one) are searched for the given pattern. On large trees, this search can take
5964 a while and put some strain on the server, so please use it with some consideration. Note that
5965 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5966 case-sensitive.</dd>
5967 EOT
5968         }
5969         print <<EOT;
5970 <dt><b>author</b></dt>
5971 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5972 <dt><b>committer</b></dt>
5973 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5974 EOT
5975         my $have_pickaxe = gitweb_check_feature('pickaxe');
5976         if ($have_pickaxe) {
5977                 print <<EOT;
5978 <dt><b>pickaxe</b></dt>
5979 <dd>All commits that caused the string to appear or disappear from any file (changes that
5980 added, removed or "modified" the string) will be listed. This search can take a while and
5981 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5982 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5983 EOT
5984         }
5985         print "</dl>\n";
5986         git_footer_html();
5987 }
5988
5989 sub git_shortlog {
5990         my $head = git_get_head_hash($project);
5991         if (!defined $hash) {
5992                 $hash = $head;
5993         }
5994         if (!defined $page) {
5995                 $page = 0;
5996         }
5997         my $refs = git_get_references();
5998
5999         my $commit_hash = $hash;
6000         if (defined $hash_parent) {
6001                 $commit_hash = "$hash_parent..$hash";
6002         }
6003         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
6004
6005         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
6006         my $next_link = '';
6007         if ($#commitlist >= 100) {
6008                 $next_link =
6009                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6010                                  -accesskey => "n", -title => "Alt-n"}, "next");
6011         }
6012         my $patch_max = gitweb_check_feature('patches');
6013         if ($patch_max) {
6014                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6015                         $paging_nav .= " &sdot; " .
6016                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6017                                         "patches");
6018                 }
6019         }
6020
6021         git_header_html();
6022         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
6023         git_print_header_div('summary', $project);
6024
6025         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
6026
6027         git_footer_html();
6028 }
6029
6030 ## ......................................................................
6031 ## feeds (RSS, Atom; OPML)
6032
6033 sub git_feed {
6034         my $format = shift || 'atom';
6035         my $have_blame = gitweb_check_feature('blame');
6036
6037         # Atom: http://www.atomenabled.org/developers/syndication/
6038         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6039         if ($format ne 'rss' && $format ne 'atom') {
6040                 die_error(400, "Unknown web feed format");
6041         }
6042
6043         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6044         my $head = $hash || 'HEAD';
6045         my @commitlist = parse_commits($head, 150, 0, $file_name);
6046
6047         my %latest_commit;
6048         my %latest_date;
6049         my $content_type = "application/$format+xml";
6050         if (defined $cgi->http('HTTP_ACCEPT') &&
6051                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6052                 # browser (feed reader) prefers text/xml
6053                 $content_type = 'text/xml';
6054         }
6055         if (defined($commitlist[0])) {
6056                 %latest_commit = %{$commitlist[0]};
6057                 my $latest_epoch = $latest_commit{'committer_epoch'};
6058                 %latest_date   = parse_date($latest_epoch);
6059                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6060                 if (defined $if_modified) {
6061                         my $since;
6062                         if (eval { require HTTP::Date; 1; }) {
6063                                 $since = HTTP::Date::str2time($if_modified);
6064                         } elsif (eval { require Time::ParseDate; 1; }) {
6065                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6066                         }
6067                         if (defined $since && $latest_epoch <= $since) {
6068                                 print $cgi->header(
6069                                         -type => $content_type,
6070                                         -charset => 'utf-8',
6071                                         -last_modified => $latest_date{'rfc2822'},
6072                                         -status => '304 Not Modified');
6073                                 return;
6074                         }
6075                 }
6076                 print $cgi->header(
6077                         -type => $content_type,
6078                         -charset => 'utf-8',
6079                         -last_modified => $latest_date{'rfc2822'});
6080         } else {
6081                 print $cgi->header(
6082                         -type => $content_type,
6083                         -charset => 'utf-8');
6084         }
6085
6086         # Optimization: skip generating the body if client asks only
6087         # for Last-Modified date.
6088         return if ($cgi->request_method() eq 'HEAD');
6089
6090         # header variables
6091         my $title = "$site_name - $project/$action";
6092         my $feed_type = 'log';
6093         if (defined $hash) {
6094                 $title .= " - '$hash'";
6095                 $feed_type = 'branch log';
6096                 if (defined $file_name) {
6097                         $title .= " :: $file_name";
6098                         $feed_type = 'history';
6099                 }
6100         } elsif (defined $file_name) {
6101                 $title .= " - $file_name";
6102                 $feed_type = 'history';
6103         }
6104         $title .= " $feed_type";
6105         my $descr = git_get_project_description($project);
6106         if (defined $descr) {
6107                 $descr = esc_html($descr);
6108         } else {
6109                 $descr = "$project " .
6110                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6111                          " feed";
6112         }
6113         my $owner = git_get_project_owner($project);
6114         $owner = esc_html($owner);
6115
6116         #header
6117         my $alt_url;
6118         if (defined $file_name) {
6119                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6120         } elsif (defined $hash) {
6121                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6122         } else {
6123                 $alt_url = href(-full=>1, action=>"summary");
6124         }
6125         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6126         if ($format eq 'rss') {
6127                 print <<XML;
6128 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6129 <channel>
6130 XML
6131                 print "<title>$title</title>\n" .
6132                       "<link>$alt_url</link>\n" .
6133                       "<description>$descr</description>\n" .
6134                       "<language>en</language>\n" .
6135                       # project owner is responsible for 'editorial' content
6136                       "<managingEditor>$owner</managingEditor>\n";
6137                 if (defined $logo || defined $favicon) {
6138                         # prefer the logo to the favicon, since RSS
6139                         # doesn't allow both
6140                         my $img = esc_url($logo || $favicon);
6141                         print "<image>\n" .
6142                               "<url>$img</url>\n" .
6143                               "<title>$title</title>\n" .
6144                               "<link>$alt_url</link>\n" .
6145                               "</image>\n";
6146                 }
6147                 if (%latest_date) {
6148                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6149                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6150                 }
6151                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6152         } elsif ($format eq 'atom') {
6153                 print <<XML;
6154 <feed xmlns="http://www.w3.org/2005/Atom">
6155 XML
6156                 print "<title>$title</title>\n" .
6157                       "<subtitle>$descr</subtitle>\n" .
6158                       '<link rel="alternate" type="text/html" href="' .
6159                       $alt_url . '" />' . "\n" .
6160                       '<link rel="self" type="' . $content_type . '" href="' .
6161                       $cgi->self_url() . '" />' . "\n" .
6162                       "<id>" . href(-full=>1) . "</id>\n" .
6163                       # use project owner for feed author
6164                       "<author><name>$owner</name></author>\n";
6165                 if (defined $favicon) {
6166                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6167                 }
6168                 if (defined $logo_url) {
6169                         # not twice as wide as tall: 72 x 27 pixels
6170                         print "<logo>" . esc_url($logo) . "</logo>\n";
6171                 }
6172                 if (! %latest_date) {
6173                         # dummy date to keep the feed valid until commits trickle in:
6174                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6175                 } else {
6176                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6177                 }
6178                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6179         }
6180
6181         # contents
6182         for (my $i = 0; $i <= $#commitlist; $i++) {
6183                 my %co = %{$commitlist[$i]};
6184                 my $commit = $co{'id'};
6185                 # we read 150, we always show 30 and the ones more recent than 48 hours
6186                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6187                         last;
6188                 }
6189                 my %cd = parse_date($co{'author_epoch'});
6190
6191                 # get list of changed files
6192                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6193                         $co{'parent'} || "--root",
6194                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6195                         or next;
6196                 my @difftree = map { chomp; $_ } <$fd>;
6197                 close $fd
6198                         or next;
6199
6200                 # print element (entry, item)
6201                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6202                 if ($format eq 'rss') {
6203                         print "<item>\n" .
6204                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6205                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6206                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6207                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6208                               "<link>$co_url</link>\n" .
6209                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6210                               "<content:encoded>" .
6211                               "<![CDATA[\n";
6212                 } elsif ($format eq 'atom') {
6213                         print "<entry>\n" .
6214                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6215                               "<updated>$cd{'iso-8601'}</updated>\n" .
6216                               "<author>\n" .
6217                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6218                         if ($co{'author_email'}) {
6219                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6220                         }
6221                         print "</author>\n" .
6222                               # use committer for contributor
6223                               "<contributor>\n" .
6224                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6225                         if ($co{'committer_email'}) {
6226                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6227                         }
6228                         print "</contributor>\n" .
6229                               "<published>$cd{'iso-8601'}</published>\n" .
6230                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6231                               "<id>$co_url</id>\n" .
6232                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6233                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6234                 }
6235                 my $comment = $co{'comment'};
6236                 print "<pre>\n";
6237                 foreach my $line (@$comment) {
6238                         $line = esc_html($line);
6239                         print "$line\n";
6240                 }
6241                 print "</pre><ul>\n";
6242                 foreach my $difftree_line (@difftree) {
6243                         my %difftree = parse_difftree_raw_line($difftree_line);
6244                         next if !$difftree{'from_id'};
6245
6246                         my $file = $difftree{'file'} || $difftree{'to_file'};
6247
6248                         print "<li>" .
6249                               "[" .
6250                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6251                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6252                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6253                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6254                                       -title => "diff"}, 'D');
6255                         if ($have_blame) {
6256                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6257                                                              file_name=>$file, hash_base=>$commit),
6258                                               -title => "blame"}, 'B');
6259                         }
6260                         # if this is not a feed of a file history
6261                         if (!defined $file_name || $file_name ne $file) {
6262                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6263                                                              file_name=>$file, hash=>$commit),
6264                                               -title => "history"}, 'H');
6265                         }
6266                         $file = esc_path($file);
6267                         print "] ".
6268                               "$file</li>\n";
6269                 }
6270                 if ($format eq 'rss') {
6271                         print "</ul>]]>\n" .
6272                               "</content:encoded>\n" .
6273                               "</item>\n";
6274                 } elsif ($format eq 'atom') {
6275                         print "</ul>\n</div>\n" .
6276                               "</content>\n" .
6277                               "</entry>\n";
6278                 }
6279         }
6280
6281         # end of feed
6282         if ($format eq 'rss') {
6283                 print "</channel>\n</rss>\n";
6284         } elsif ($format eq 'atom') {
6285                 print "</feed>\n";
6286         }
6287 }
6288
6289 sub git_rss {
6290         git_feed('rss');
6291 }
6292
6293 sub git_atom {
6294         git_feed('atom');
6295 }
6296
6297 sub git_opml {
6298         my @list = git_get_projects_list();
6299
6300         print $cgi->header(
6301                 -type => 'text/xml',
6302                 -charset => 'utf-8',
6303                 -content_disposition => 'inline; filename="opml.xml"');
6304
6305         print <<XML;
6306 <?xml version="1.0" encoding="utf-8"?>
6307 <opml version="1.0">
6308 <head>
6309   <title>$site_name OPML Export</title>
6310 </head>
6311 <body>
6312 <outline text="git RSS feeds">
6313 XML
6314
6315         foreach my $pr (@list) {
6316                 my %proj = %$pr;
6317                 my $head = git_get_head_hash($proj{'path'});
6318                 if (!defined $head) {
6319                         next;
6320                 }
6321                 $git_dir = "$projectroot/$proj{'path'}";
6322                 my %co = parse_commit($head);
6323                 if (!%co) {
6324                         next;
6325                 }
6326
6327                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6328                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6329                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6330                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6331         }
6332         print <<XML;
6333 </outline>
6334 </body>
6335 </opml>
6336 XML
6337 }