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                 return $cgi->a({-href => $href, -class => "list subject",
1463                                 -title => to_utf8($long)},
1464                        esc_html($short) . $extra);
1465         } else {
1466                 return $cgi->a({-href => $href, -class => "list subject"},
1467                        esc_html($long)  . $extra);
1468         }
1469 }
1470
1471 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1472 sub format_git_diff_header_line {
1473         my $line = shift;
1474         my $diffinfo = shift;
1475         my ($from, $to) = @_;
1476
1477         if ($diffinfo->{'nparents'}) {
1478                 # combined diff
1479                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1480                 if ($to->{'href'}) {
1481                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1482                                          esc_path($to->{'file'}));
1483                 } else { # file was deleted (no href)
1484                         $line .= esc_path($to->{'file'});
1485                 }
1486         } else {
1487                 # "ordinary" diff
1488                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1489                 if ($from->{'href'}) {
1490                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1491                                          'a/' . esc_path($from->{'file'}));
1492                 } else { # file was added (no href)
1493                         $line .= 'a/' . esc_path($from->{'file'});
1494                 }
1495                 $line .= ' ';
1496                 if ($to->{'href'}) {
1497                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1498                                          'b/' . esc_path($to->{'file'}));
1499                 } else { # file was deleted
1500                         $line .= 'b/' . esc_path($to->{'file'});
1501                 }
1502         }
1503
1504         return "<div class=\"diff header\">$line</div>\n";
1505 }
1506
1507 # format extended diff header line, before patch itself
1508 sub format_extended_diff_header_line {
1509         my $line = shift;
1510         my $diffinfo = shift;
1511         my ($from, $to) = @_;
1512
1513         # match <path>
1514         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1515                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1516                                        esc_path($from->{'file'}));
1517         }
1518         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1519                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1520                                  esc_path($to->{'file'}));
1521         }
1522         # match single <mode>
1523         if ($line =~ m/\s(\d{6})$/) {
1524                 $line .= '<span class="info"> (' .
1525                          file_type_long($1) .
1526                          ')</span>';
1527         }
1528         # match <hash>
1529         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1530                 # can match only for combined diff
1531                 $line = 'index ';
1532                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1533                         if ($from->{'href'}[$i]) {
1534                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1535                                                   -class=>"hash"},
1536                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1537                         } else {
1538                                 $line .= '0' x 7;
1539                         }
1540                         # separator
1541                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1542                 }
1543                 $line .= '..';
1544                 if ($to->{'href'}) {
1545                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1546                                          substr($diffinfo->{'to_id'},0,7));
1547                 } else {
1548                         $line .= '0' x 7;
1549                 }
1550
1551         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1552                 # can match only for ordinary diff
1553                 my ($from_link, $to_link);
1554                 if ($from->{'href'}) {
1555                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1556                                              substr($diffinfo->{'from_id'},0,7));
1557                 } else {
1558                         $from_link = '0' x 7;
1559                 }
1560                 if ($to->{'href'}) {
1561                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1562                                            substr($diffinfo->{'to_id'},0,7));
1563                 } else {
1564                         $to_link = '0' x 7;
1565                 }
1566                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1567                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1568         }
1569
1570         return $line . "<br/>\n";
1571 }
1572
1573 # format from-file/to-file diff header
1574 sub format_diff_from_to_header {
1575         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1576         my $line;
1577         my $result = '';
1578
1579         $line = $from_line;
1580         #assert($line =~ m/^---/) if DEBUG;
1581         # no extra formatting for "^--- /dev/null"
1582         if (! $diffinfo->{'nparents'}) {
1583                 # ordinary (single parent) diff
1584                 if ($line =~ m!^--- "?a/!) {
1585                         if ($from->{'href'}) {
1586                                 $line = '--- a/' .
1587                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1588                                                 esc_path($from->{'file'}));
1589                         } else {
1590                                 $line = '--- a/' .
1591                                         esc_path($from->{'file'});
1592                         }
1593                 }
1594                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1595
1596         } else {
1597                 # combined diff (merge commit)
1598                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1599                         if ($from->{'href'}[$i]) {
1600                                 $line = '--- ' .
1601                                         $cgi->a({-href=>href(action=>"blobdiff",
1602                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1603                                                              hash_parent_base=>$parents[$i],
1604                                                              file_parent=>$from->{'file'}[$i],
1605                                                              hash=>$diffinfo->{'to_id'},
1606                                                              hash_base=>$hash,
1607                                                              file_name=>$to->{'file'}),
1608                                                  -class=>"path",
1609                                                  -title=>"diff" . ($i+1)},
1610                                                 $i+1) .
1611                                         '/' .
1612                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1613                                                 esc_path($from->{'file'}[$i]));
1614                         } else {
1615                                 $line = '--- /dev/null';
1616                         }
1617                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1618                 }
1619         }
1620
1621         $line = $to_line;
1622         #assert($line =~ m/^\+\+\+/) if DEBUG;
1623         # no extra formatting for "^+++ /dev/null"
1624         if ($line =~ m!^\+\+\+ "?b/!) {
1625                 if ($to->{'href'}) {
1626                         $line = '+++ b/' .
1627                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1628                                         esc_path($to->{'file'}));
1629                 } else {
1630                         $line = '+++ b/' .
1631                                 esc_path($to->{'file'});
1632                 }
1633         }
1634         $result .= qq!<div class="diff to_file">$line</div>\n!;
1635
1636         return $result;
1637 }
1638
1639 # create note for patch simplified by combined diff
1640 sub format_diff_cc_simplified {
1641         my ($diffinfo, @parents) = @_;
1642         my $result = '';
1643
1644         $result .= "<div class=\"diff header\">" .
1645                    "diff --cc ";
1646         if (!is_deleted($diffinfo)) {
1647                 $result .= $cgi->a({-href => href(action=>"blob",
1648                                                   hash_base=>$hash,
1649                                                   hash=>$diffinfo->{'to_id'},
1650                                                   file_name=>$diffinfo->{'to_file'}),
1651                                     -class => "path"},
1652                                    esc_path($diffinfo->{'to_file'}));
1653         } else {
1654                 $result .= esc_path($diffinfo->{'to_file'});
1655         }
1656         $result .= "</div>\n" . # class="diff header"
1657                    "<div class=\"diff nodifferences\">" .
1658                    "Simple merge" .
1659                    "</div>\n"; # class="diff nodifferences"
1660
1661         return $result;
1662 }
1663
1664 # format patch (diff) line (not to be used for diff headers)
1665 sub format_diff_line {
1666         my $line = shift;
1667         my ($from, $to) = @_;
1668         my $diff_class = "";
1669
1670         chomp $line;
1671
1672         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1673                 # combined diff
1674                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1675                 if ($line =~ m/^\@{3}/) {
1676                         $diff_class = " chunk_header";
1677                 } elsif ($line =~ m/^\\/) {
1678                         $diff_class = " incomplete";
1679                 } elsif ($prefix =~ tr/+/+/) {
1680                         $diff_class = " add";
1681                 } elsif ($prefix =~ tr/-/-/) {
1682                         $diff_class = " rem";
1683                 }
1684         } else {
1685                 # assume ordinary diff
1686                 my $char = substr($line, 0, 1);
1687                 if ($char eq '+') {
1688                         $diff_class = " add";
1689                 } elsif ($char eq '-') {
1690                         $diff_class = " rem";
1691                 } elsif ($char eq '@') {
1692                         $diff_class = " chunk_header";
1693                 } elsif ($char eq "\\") {
1694                         $diff_class = " incomplete";
1695                 }
1696         }
1697         $line = untabify($line);
1698         if ($from && $to && $line =~ m/^\@{2} /) {
1699                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1700                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1701
1702                 $from_lines = 0 unless defined $from_lines;
1703                 $to_lines   = 0 unless defined $to_lines;
1704
1705                 if ($from->{'href'}) {
1706                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1707                                              -class=>"list"}, $from_text);
1708                 }
1709                 if ($to->{'href'}) {
1710                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1711                                              -class=>"list"}, $to_text);
1712                 }
1713                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1714                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1715                 return "<div class=\"diff$diff_class\">$line</div>\n";
1716         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1717                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1718                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1719
1720                 @from_text = split(' ', $ranges);
1721                 for (my $i = 0; $i < @from_text; ++$i) {
1722                         ($from_start[$i], $from_nlines[$i]) =
1723                                 (split(',', substr($from_text[$i], 1)), 0);
1724                 }
1725
1726                 $to_text   = pop @from_text;
1727                 $to_start  = pop @from_start;
1728                 $to_nlines = pop @from_nlines;
1729
1730                 $line = "<span class=\"chunk_info\">$prefix ";
1731                 for (my $i = 0; $i < @from_text; ++$i) {
1732                         if ($from->{'href'}[$i]) {
1733                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1734                                                   -class=>"list"}, $from_text[$i]);
1735                         } else {
1736                                 $line .= $from_text[$i];
1737                         }
1738                         $line .= " ";
1739                 }
1740                 if ($to->{'href'}) {
1741                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1742                                           -class=>"list"}, $to_text);
1743                 } else {
1744                         $line .= $to_text;
1745                 }
1746                 $line .= " $prefix</span>" .
1747                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1748                 return "<div class=\"diff$diff_class\">$line</div>\n";
1749         }
1750         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1751 }
1752
1753 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1754 # linked.  Pass the hash of the tree/commit to snapshot.
1755 sub format_snapshot_links {
1756         my ($hash) = @_;
1757         my $num_fmts = @snapshot_fmts;
1758         if ($num_fmts > 1) {
1759                 # A parenthesized list of links bearing format names.
1760                 # e.g. "snapshot (_tar.gz_ _zip_)"
1761                 return "snapshot (" . join(' ', map
1762                         $cgi->a({
1763                                 -href => href(
1764                                         action=>"snapshot",
1765                                         hash=>$hash,
1766                                         snapshot_format=>$_
1767                                 )
1768                         }, $known_snapshot_formats{$_}{'display'})
1769                 , @snapshot_fmts) . ")";
1770         } elsif ($num_fmts == 1) {
1771                 # A single "snapshot" link whose tooltip bears the format name.
1772                 # i.e. "_snapshot_"
1773                 my ($fmt) = @snapshot_fmts;
1774                 return
1775                         $cgi->a({
1776                                 -href => href(
1777                                         action=>"snapshot",
1778                                         hash=>$hash,
1779                                         snapshot_format=>$fmt
1780                                 ),
1781                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1782                         }, "snapshot");
1783         } else { # $num_fmts == 0
1784                 return undef;
1785         }
1786 }
1787
1788 ## ......................................................................
1789 ## functions returning values to be passed, perhaps after some
1790 ## transformation, to other functions; e.g. returning arguments to href()
1791
1792 # returns hash to be passed to href to generate gitweb URL
1793 # in -title key it returns description of link
1794 sub get_feed_info {
1795         my $format = shift || 'Atom';
1796         my %res = (action => lc($format));
1797
1798         # feed links are possible only for project views
1799         return unless (defined $project);
1800         # some views should link to OPML, or to generic project feed,
1801         # or don't have specific feed yet (so they should use generic)
1802         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1803
1804         my $branch;
1805         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1806         # from tag links; this also makes possible to detect branch links
1807         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1808             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1809                 $branch = $1;
1810         }
1811         # find log type for feed description (title)
1812         my $type = 'log';
1813         if (defined $file_name) {
1814                 $type  = "history of $file_name";
1815                 $type .= "/" if ($action eq 'tree');
1816                 $type .= " on '$branch'" if (defined $branch);
1817         } else {
1818                 $type = "log of $branch" if (defined $branch);
1819         }
1820
1821         $res{-title} = $type;
1822         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1823         $res{'file_name'} = $file_name;
1824
1825         return %res;
1826 }
1827
1828 ## ----------------------------------------------------------------------
1829 ## git utility subroutines, invoking git commands
1830
1831 # returns path to the core git executable and the --git-dir parameter as list
1832 sub git_cmd {
1833         return $GIT, '--git-dir='.$git_dir;
1834 }
1835
1836 # quote the given arguments for passing them to the shell
1837 # quote_command("command", "arg 1", "arg with ' and ! characters")
1838 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1839 # Try to avoid using this function wherever possible.
1840 sub quote_command {
1841         return join(' ',
1842                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
1843 }
1844
1845 # get HEAD ref of given project as hash
1846 sub git_get_head_hash {
1847         my $project = shift;
1848         my $o_git_dir = $git_dir;
1849         my $retval = undef;
1850         $git_dir = "$projectroot/$project";
1851         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1852                 my $head = <$fd>;
1853                 close $fd;
1854                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1855                         $retval = $1;
1856                 }
1857         }
1858         if (defined $o_git_dir) {
1859                 $git_dir = $o_git_dir;
1860         }
1861         return $retval;
1862 }
1863
1864 # get type of given object
1865 sub git_get_type {
1866         my $hash = shift;
1867
1868         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1869         my $type = <$fd>;
1870         close $fd or return;
1871         chomp $type;
1872         return $type;
1873 }
1874
1875 # repository configuration
1876 our $config_file = '';
1877 our %config;
1878
1879 # store multiple values for single key as anonymous array reference
1880 # single values stored directly in the hash, not as [ <value> ]
1881 sub hash_set_multi {
1882         my ($hash, $key, $value) = @_;
1883
1884         if (!exists $hash->{$key}) {
1885                 $hash->{$key} = $value;
1886         } elsif (!ref $hash->{$key}) {
1887                 $hash->{$key} = [ $hash->{$key}, $value ];
1888         } else {
1889                 push @{$hash->{$key}}, $value;
1890         }
1891 }
1892
1893 # return hash of git project configuration
1894 # optionally limited to some section, e.g. 'gitweb'
1895 sub git_parse_project_config {
1896         my $section_regexp = shift;
1897         my %config;
1898
1899         local $/ = "\0";
1900
1901         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
1902                 or return;
1903
1904         while (my $keyval = <$fh>) {
1905                 chomp $keyval;
1906                 my ($key, $value) = split(/\n/, $keyval, 2);
1907
1908                 hash_set_multi(\%config, $key, $value)
1909                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
1910         }
1911         close $fh;
1912
1913         return %config;
1914 }
1915
1916 # convert config value to boolean: 'true' or 'false'
1917 # no value, number > 0, 'true' and 'yes' values are true
1918 # rest of values are treated as false (never as error)
1919 sub config_to_bool {
1920         my $val = shift;
1921
1922         return 1 if !defined $val;             # section.key
1923
1924         # strip leading and trailing whitespace
1925         $val =~ s/^\s+//;
1926         $val =~ s/\s+$//;
1927
1928         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
1929                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
1930 }
1931
1932 # convert config value to simple decimal number
1933 # an optional value suffix of 'k', 'm', or 'g' will cause the value
1934 # to be multiplied by 1024, 1048576, or 1073741824
1935 sub config_to_int {
1936         my $val = shift;
1937
1938         # strip leading and trailing whitespace
1939         $val =~ s/^\s+//;
1940         $val =~ s/\s+$//;
1941
1942         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
1943                 $unit = lc($unit);
1944                 # unknown unit is treated as 1
1945                 return $num * ($unit eq 'g' ? 1073741824 :
1946                                $unit eq 'm' ?    1048576 :
1947                                $unit eq 'k' ?       1024 : 1);
1948         }
1949         return $val;
1950 }
1951
1952 # convert config value to array reference, if needed
1953 sub config_to_multi {
1954         my $val = shift;
1955
1956         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
1957 }
1958
1959 sub git_get_project_config {
1960         my ($key, $type) = @_;
1961
1962         # key sanity check
1963         return unless ($key);
1964         $key =~ s/^gitweb\.//;
1965         return if ($key =~ m/\W/);
1966
1967         # type sanity check
1968         if (defined $type) {
1969                 $type =~ s/^--//;
1970                 $type = undef
1971                         unless ($type eq 'bool' || $type eq 'int');
1972         }
1973
1974         # get config
1975         if (!defined $config_file ||
1976             $config_file ne "$git_dir/config") {
1977                 %config = git_parse_project_config('gitweb');
1978                 $config_file = "$git_dir/config";
1979         }
1980
1981         # check if config variable (key) exists
1982         return unless exists $config{"gitweb.$key"};
1983
1984         # ensure given type
1985         if (!defined $type) {
1986                 return $config{"gitweb.$key"};
1987         } elsif ($type eq 'bool') {
1988                 # backward compatibility: 'git config --bool' returns true/false
1989                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
1990         } elsif ($type eq 'int') {
1991                 return config_to_int($config{"gitweb.$key"});
1992         }
1993         return $config{"gitweb.$key"};
1994 }
1995
1996 # get hash of given path at given ref
1997 sub git_get_hash_by_path {
1998         my $base = shift;
1999         my $path = shift || return undef;
2000         my $type = shift;
2001
2002         $path =~ s,/+$,,;
2003
2004         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2005                 or die_error(500, "Open git-ls-tree failed");
2006         my $line = <$fd>;
2007         close $fd or return undef;
2008
2009         if (!defined $line) {
2010                 # there is no tree or hash given by $path at $base
2011                 return undef;
2012         }
2013
2014         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2015         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2016         if (defined $type && $type ne $2) {
2017                 # type doesn't match
2018                 return undef;
2019         }
2020         return $3;
2021 }
2022
2023 # get path of entry with given hash at given tree-ish (ref)
2024 # used to get 'from' filename for combined diff (merge commit) for renames
2025 sub git_get_path_by_hash {
2026         my $base = shift || return;
2027         my $hash = shift || return;
2028
2029         local $/ = "\0";
2030
2031         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2032                 or return undef;
2033         while (my $line = <$fd>) {
2034                 chomp $line;
2035
2036                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2037                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2038                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2039                         close $fd;
2040                         return $1;
2041                 }
2042         }
2043         close $fd;
2044         return undef;
2045 }
2046
2047 ## ......................................................................
2048 ## git utility functions, directly accessing git repository
2049
2050 sub git_get_project_description {
2051         my $path = shift;
2052
2053         $git_dir = "$projectroot/$path";
2054         open my $fd, '<', "$git_dir/description"
2055                 or return git_get_project_config('description');
2056         my $descr = <$fd>;
2057         close $fd;
2058         if (defined $descr) {
2059                 chomp $descr;
2060         }
2061         return $descr;
2062 }
2063
2064 sub git_get_project_ctags {
2065         my $path = shift;
2066         my $ctags = {};
2067
2068         $git_dir = "$projectroot/$path";
2069         opendir my $dh, "$git_dir/ctags"
2070                 or return $ctags;
2071         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2072                 open my $ct, '<', $_ or next;
2073                 my $val = <$ct>;
2074                 chomp $val;
2075                 close $ct;
2076                 my $ctag = $_; $ctag =~ s#.*/##;
2077                 $ctags->{$ctag} = $val;
2078         }
2079         closedir $dh;
2080         $ctags;
2081 }
2082
2083 sub git_populate_project_tagcloud {
2084         my $ctags = shift;
2085
2086         # First, merge different-cased tags; tags vote on casing
2087         my %ctags_lc;
2088         foreach (keys %$ctags) {
2089                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2090                 if (not $ctags_lc{lc $_}->{topcount}
2091                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2092                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2093                         $ctags_lc{lc $_}->{topname} = $_;
2094                 }
2095         }
2096
2097         my $cloud;
2098         if (eval { require HTML::TagCloud; 1; }) {
2099                 $cloud = HTML::TagCloud->new;
2100                 foreach (sort keys %ctags_lc) {
2101                         # Pad the title with spaces so that the cloud looks
2102                         # less crammed.
2103                         my $title = $ctags_lc{$_}->{topname};
2104                         $title =~ s/ /&nbsp;/g;
2105                         $title =~ s/^/&nbsp;/g;
2106                         $title =~ s/$/&nbsp;/g;
2107                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2108                 }
2109         } else {
2110                 $cloud = \%ctags_lc;
2111         }
2112         $cloud;
2113 }
2114
2115 sub git_show_project_tagcloud {
2116         my ($cloud, $count) = @_;
2117         print STDERR ref($cloud)."..\n";
2118         if (ref $cloud eq 'HTML::TagCloud') {
2119                 return $cloud->html_and_css($count);
2120         } else {
2121                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2122                 return '<p align="center">' . join (', ', map {
2123                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2124                 } splice(@tags, 0, $count)) . '</p>';
2125         }
2126 }
2127
2128 sub git_get_project_url_list {
2129         my $path = shift;
2130
2131         $git_dir = "$projectroot/$path";
2132         open my $fd, '<', "$git_dir/cloneurl"
2133                 or return wantarray ?
2134                 @{ config_to_multi(git_get_project_config('url')) } :
2135                    config_to_multi(git_get_project_config('url'));
2136         my @git_project_url_list = map { chomp; $_ } <$fd>;
2137         close $fd;
2138
2139         return wantarray ? @git_project_url_list : \@git_project_url_list;
2140 }
2141
2142 sub git_get_projects_list {
2143         my ($filter) = @_;
2144         my @list;
2145
2146         $filter ||= '';
2147         $filter =~ s/\.git$//;
2148
2149         my $check_forks = gitweb_check_feature('forks');
2150
2151         if (-d $projects_list) {
2152                 # search in directory
2153                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2154                 # remove the trailing "/"
2155                 $dir =~ s!/+$!!;
2156                 my $pfxlen = length("$dir");
2157                 my $pfxdepth = ($dir =~ tr!/!!);
2158
2159                 File::Find::find({
2160                         follow_fast => 1, # follow symbolic links
2161                         follow_skip => 2, # ignore duplicates
2162                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2163                         wanted => sub {
2164                                 # skip project-list toplevel, if we get it.
2165                                 return if (m!^[/.]$!);
2166                                 # only directories can be git repositories
2167                                 return unless (-d $_);
2168                                 # don't traverse too deep (Find is super slow on os x)
2169                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2170                                         $File::Find::prune = 1;
2171                                         return;
2172                                 }
2173
2174                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2175                                 # we check related file in $projectroot
2176                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2177                                 if (check_export_ok("$projectroot/$path")) {
2178                                         push @list, { path => $path };
2179                                         $File::Find::prune = 1;
2180                                 }
2181                         },
2182                 }, "$dir");
2183
2184         } elsif (-f $projects_list) {
2185                 # read from file(url-encoded):
2186                 # 'git%2Fgit.git Linus+Torvalds'
2187                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2188                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2189                 my %paths;
2190                 open my $fd, '<', $projects_list or return;
2191         PROJECT:
2192                 while (my $line = <$fd>) {
2193                         chomp $line;
2194                         my ($path, $owner) = split ' ', $line;
2195                         $path = unescape($path);
2196                         $owner = unescape($owner);
2197                         if (!defined $path) {
2198                                 next;
2199                         }
2200                         if ($filter ne '') {
2201                                 # looking for forks;
2202                                 my $pfx = substr($path, 0, length($filter));
2203                                 if ($pfx ne $filter) {
2204                                         next PROJECT;
2205                                 }
2206                                 my $sfx = substr($path, length($filter));
2207                                 if ($sfx !~ /^\/.*\.git$/) {
2208                                         next PROJECT;
2209                                 }
2210                         } elsif ($check_forks) {
2211                         PATH:
2212                                 foreach my $filter (keys %paths) {
2213                                         # looking for forks;
2214                                         my $pfx = substr($path, 0, length($filter));
2215                                         if ($pfx ne $filter) {
2216                                                 next PATH;
2217                                         }
2218                                         my $sfx = substr($path, length($filter));
2219                                         if ($sfx !~ /^\/.*\.git$/) {
2220                                                 next PATH;
2221                                         }
2222                                         # is a fork, don't include it in
2223                                         # the list
2224                                         next PROJECT;
2225                                 }
2226                         }
2227                         if (check_export_ok("$projectroot/$path")) {
2228                                 my $pr = {
2229                                         path => $path,
2230                                         owner => to_utf8($owner),
2231                                 };
2232                                 push @list, $pr;
2233                                 (my $forks_path = $path) =~ s/\.git$//;
2234                                 $paths{$forks_path}++;
2235                         }
2236                 }
2237                 close $fd;
2238         }
2239         return @list;
2240 }
2241
2242 our $gitweb_project_owner = undef;
2243 sub git_get_project_list_from_file {
2244
2245         return if (defined $gitweb_project_owner);
2246
2247         $gitweb_project_owner = {};
2248         # read from file (url-encoded):
2249         # 'git%2Fgit.git Linus+Torvalds'
2250         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2251         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2252         if (-f $projects_list) {
2253                 open(my $fd, '<', $projects_list);
2254                 while (my $line = <$fd>) {
2255                         chomp $line;
2256                         my ($pr, $ow) = split ' ', $line;
2257                         $pr = unescape($pr);
2258                         $ow = unescape($ow);
2259                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2260                 }
2261                 close $fd;
2262         }
2263 }
2264
2265 sub git_get_project_owner {
2266         my $project = shift;
2267         my $owner;
2268
2269         return undef unless $project;
2270         $git_dir = "$projectroot/$project";
2271
2272         if (!defined $gitweb_project_owner) {
2273                 git_get_project_list_from_file();
2274         }
2275
2276         if (exists $gitweb_project_owner->{$project}) {
2277                 $owner = $gitweb_project_owner->{$project};
2278         }
2279         if (!defined $owner){
2280                 $owner = git_get_project_config('owner');
2281         }
2282         if (!defined $owner) {
2283                 $owner = get_file_owner("$git_dir");
2284         }
2285
2286         return $owner;
2287 }
2288
2289 sub git_get_last_activity {
2290         my ($path) = @_;
2291         my $fd;
2292
2293         $git_dir = "$projectroot/$path";
2294         open($fd, "-|", git_cmd(), 'for-each-ref',
2295              '--format=%(committer)',
2296              '--sort=-committerdate',
2297              '--count=1',
2298              'refs/heads') or return;
2299         my $most_recent = <$fd>;
2300         close $fd or return;
2301         if (defined $most_recent &&
2302             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2303                 my $timestamp = $1;
2304                 my $age = time - $timestamp;
2305                 return ($age, age_string($age));
2306         }
2307         return (undef, undef);
2308 }
2309
2310 sub git_get_references {
2311         my $type = shift || "";
2312         my %refs;
2313         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2314         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2315         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2316                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2317                 or return;
2318
2319         while (my $line = <$fd>) {
2320                 chomp $line;
2321                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2322                         if (defined $refs{$1}) {
2323                                 push @{$refs{$1}}, $2;
2324                         } else {
2325                                 $refs{$1} = [ $2 ];
2326                         }
2327                 }
2328         }
2329         close $fd or return;
2330         return \%refs;
2331 }
2332
2333 sub git_get_rev_name_tags {
2334         my $hash = shift || return undef;
2335
2336         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2337                 or return;
2338         my $name_rev = <$fd>;
2339         close $fd;
2340
2341         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2342                 return $1;
2343         } else {
2344                 # catches also '$hash undefined' output
2345                 return undef;
2346         }
2347 }
2348
2349 ## ----------------------------------------------------------------------
2350 ## parse to hash functions
2351
2352 sub parse_date {
2353         my $epoch = shift;
2354         my $tz = shift || "-0000";
2355
2356         my %date;
2357         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2358         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2359         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2360         $date{'hour'} = $hour;
2361         $date{'minute'} = $min;
2362         $date{'mday'} = $mday;
2363         $date{'day'} = $days[$wday];
2364         $date{'month'} = $months[$mon];
2365         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2366                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2367         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2368                              $mday, $months[$mon], $hour ,$min;
2369         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2370                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2371
2372         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2373         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2374         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2375         $date{'hour_local'} = $hour;
2376         $date{'minute_local'} = $min;
2377         $date{'tz_local'} = $tz;
2378         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2379                                   1900+$year, $mon+1, $mday,
2380                                   $hour, $min, $sec, $tz);
2381         return %date;
2382 }
2383
2384 sub parse_tag {
2385         my $tag_id = shift;
2386         my %tag;
2387         my @comment;
2388
2389         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2390         $tag{'id'} = $tag_id;
2391         while (my $line = <$fd>) {
2392                 chomp $line;
2393                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2394                         $tag{'object'} = $1;
2395                 } elsif ($line =~ m/^type (.+)$/) {
2396                         $tag{'type'} = $1;
2397                 } elsif ($line =~ m/^tag (.+)$/) {
2398                         $tag{'name'} = $1;
2399                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2400                         $tag{'author'} = $1;
2401                         $tag{'epoch'} = $2;
2402                         $tag{'tz'} = $3;
2403                 } elsif ($line =~ m/--BEGIN/) {
2404                         push @comment, $line;
2405                         last;
2406                 } elsif ($line eq "") {
2407                         last;
2408                 }
2409         }
2410         push @comment, <$fd>;
2411         $tag{'comment'} = \@comment;
2412         close $fd or return;
2413         if (!defined $tag{'name'}) {
2414                 return
2415         };
2416         return %tag
2417 }
2418
2419 sub parse_commit_text {
2420         my ($commit_text, $withparents) = @_;
2421         my @commit_lines = split '\n', $commit_text;
2422         my %co;
2423
2424         pop @commit_lines; # Remove '\0'
2425
2426         if (! @commit_lines) {
2427                 return;
2428         }
2429
2430         my $header = shift @commit_lines;
2431         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2432                 return;
2433         }
2434         ($co{'id'}, my @parents) = split ' ', $header;
2435         while (my $line = shift @commit_lines) {
2436                 last if $line eq "\n";
2437                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2438                         $co{'tree'} = $1;
2439                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2440                         push @parents, $1;
2441                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2442                         $co{'author'} = $1;
2443                         $co{'author_epoch'} = $2;
2444                         $co{'author_tz'} = $3;
2445                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2446                                 $co{'author_name'}  = $1;
2447                                 $co{'author_email'} = $2;
2448                         } else {
2449                                 $co{'author_name'} = $co{'author'};
2450                         }
2451                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2452                         $co{'committer'} = $1;
2453                         $co{'committer_epoch'} = $2;
2454                         $co{'committer_tz'} = $3;
2455                         $co{'committer_name'} = $co{'committer'};
2456                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2457                                 $co{'committer_name'}  = $1;
2458                                 $co{'committer_email'} = $2;
2459                         } else {
2460                                 $co{'committer_name'} = $co{'committer'};
2461                         }
2462                 }
2463         }
2464         if (!defined $co{'tree'}) {
2465                 return;
2466         };
2467         $co{'parents'} = \@parents;
2468         $co{'parent'} = $parents[0];
2469
2470         foreach my $title (@commit_lines) {
2471                 $title =~ s/^    //;
2472                 if ($title ne "") {
2473                         $co{'title'} = chop_str($title, 80, 5);
2474                         # remove leading stuff of merges to make the interesting part visible
2475                         if (length($title) > 50) {
2476                                 $title =~ s/^Automatic //;
2477                                 $title =~ s/^merge (of|with) /Merge ... /i;
2478                                 if (length($title) > 50) {
2479                                         $title =~ s/(http|rsync):\/\///;
2480                                 }
2481                                 if (length($title) > 50) {
2482                                         $title =~ s/(master|www|rsync)\.//;
2483                                 }
2484                                 if (length($title) > 50) {
2485                                         $title =~ s/kernel.org:?//;
2486                                 }
2487                                 if (length($title) > 50) {
2488                                         $title =~ s/\/pub\/scm//;
2489                                 }
2490                         }
2491                         $co{'title_short'} = chop_str($title, 50, 5);
2492                         last;
2493                 }
2494         }
2495         if (! defined $co{'title'} || $co{'title'} eq "") {
2496                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2497         }
2498         # remove added spaces
2499         foreach my $line (@commit_lines) {
2500                 $line =~ s/^    //;
2501         }
2502         $co{'comment'} = \@commit_lines;
2503
2504         my $age = time - $co{'committer_epoch'};
2505         $co{'age'} = $age;
2506         $co{'age_string'} = age_string($age);
2507         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2508         if ($age > 60*60*24*7*2) {
2509                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2510                 $co{'age_string_age'} = $co{'age_string'};
2511         } else {
2512                 $co{'age_string_date'} = $co{'age_string'};
2513                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2514         }
2515         return %co;
2516 }
2517
2518 sub parse_commit {
2519         my ($commit_id) = @_;
2520         my %co;
2521
2522         local $/ = "\0";
2523
2524         open my $fd, "-|", git_cmd(), "rev-list",
2525                 "--parents",
2526                 "--header",
2527                 "--max-count=1",
2528                 $commit_id,
2529                 "--",
2530                 or die_error(500, "Open git-rev-list failed");
2531         %co = parse_commit_text(<$fd>, 1);
2532         close $fd;
2533
2534         return %co;
2535 }
2536
2537 sub parse_commits {
2538         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2539         my @cos;
2540
2541         $maxcount ||= 1;
2542         $skip ||= 0;
2543
2544         local $/ = "\0";
2545
2546         open my $fd, "-|", git_cmd(), "rev-list",
2547                 "--header",
2548                 @args,
2549                 ("--max-count=" . $maxcount),
2550                 ("--skip=" . $skip),
2551                 @extra_options,
2552                 $commit_id,
2553                 "--",
2554                 ($filename ? ($filename) : ())
2555                 or die_error(500, "Open git-rev-list failed");
2556         while (my $line = <$fd>) {
2557                 my %co = parse_commit_text($line);
2558                 push @cos, \%co;
2559         }
2560         close $fd;
2561
2562         return wantarray ? @cos : \@cos;
2563 }
2564
2565 # parse line of git-diff-tree "raw" output
2566 sub parse_difftree_raw_line {
2567         my $line = shift;
2568         my %res;
2569
2570         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2571         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2572         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2573                 $res{'from_mode'} = $1;
2574                 $res{'to_mode'} = $2;
2575                 $res{'from_id'} = $3;
2576                 $res{'to_id'} = $4;
2577                 $res{'status'} = $5;
2578                 $res{'similarity'} = $6;
2579                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2580                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2581                 } else {
2582                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2583                 }
2584         }
2585         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2586         # combined diff (for merge commit)
2587         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2588                 $res{'nparents'}  = length($1);
2589                 $res{'from_mode'} = [ split(' ', $2) ];
2590                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2591                 $res{'from_id'} = [ split(' ', $3) ];
2592                 $res{'to_id'} = pop @{$res{'from_id'}};
2593                 $res{'status'} = [ split('', $4) ];
2594                 $res{'to_file'} = unquote($5);
2595         }
2596         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2597         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2598                 $res{'commit'} = $1;
2599         }
2600
2601         return wantarray ? %res : \%res;
2602 }
2603
2604 # wrapper: return parsed line of git-diff-tree "raw" output
2605 # (the argument might be raw line, or parsed info)
2606 sub parsed_difftree_line {
2607         my $line_or_ref = shift;
2608
2609         if (ref($line_or_ref) eq "HASH") {
2610                 # pre-parsed (or generated by hand)
2611                 return $line_or_ref;
2612         } else {
2613                 return parse_difftree_raw_line($line_or_ref);
2614         }
2615 }
2616
2617 # parse line of git-ls-tree output
2618 sub parse_ls_tree_line {
2619         my $line = shift;
2620         my %opts = @_;
2621         my %res;
2622
2623         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2624         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2625
2626         $res{'mode'} = $1;
2627         $res{'type'} = $2;
2628         $res{'hash'} = $3;
2629         if ($opts{'-z'}) {
2630                 $res{'name'} = $4;
2631         } else {
2632                 $res{'name'} = unquote($4);
2633         }
2634
2635         return wantarray ? %res : \%res;
2636 }
2637
2638 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2639 sub parse_from_to_diffinfo {
2640         my ($diffinfo, $from, $to, @parents) = @_;
2641
2642         if ($diffinfo->{'nparents'}) {
2643                 # combined diff
2644                 $from->{'file'} = [];
2645                 $from->{'href'} = [];
2646                 fill_from_file_info($diffinfo, @parents)
2647                         unless exists $diffinfo->{'from_file'};
2648                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2649                         $from->{'file'}[$i] =
2650                                 defined $diffinfo->{'from_file'}[$i] ?
2651                                         $diffinfo->{'from_file'}[$i] :
2652                                         $diffinfo->{'to_file'};
2653                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2654                                 $from->{'href'}[$i] = href(action=>"blob",
2655                                                            hash_base=>$parents[$i],
2656                                                            hash=>$diffinfo->{'from_id'}[$i],
2657                                                            file_name=>$from->{'file'}[$i]);
2658                         } else {
2659                                 $from->{'href'}[$i] = undef;
2660                         }
2661                 }
2662         } else {
2663                 # ordinary (not combined) diff
2664                 $from->{'file'} = $diffinfo->{'from_file'};
2665                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2666                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2667                                                hash=>$diffinfo->{'from_id'},
2668                                                file_name=>$from->{'file'});
2669                 } else {
2670                         delete $from->{'href'};
2671                 }
2672         }
2673
2674         $to->{'file'} = $diffinfo->{'to_file'};
2675         if (!is_deleted($diffinfo)) { # file exists in result
2676                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2677                                      hash=>$diffinfo->{'to_id'},
2678                                      file_name=>$to->{'file'});
2679         } else {
2680                 delete $to->{'href'};
2681         }
2682 }
2683
2684 ## ......................................................................
2685 ## parse to array of hashes functions
2686
2687 sub git_get_heads_list {
2688         my $limit = shift;
2689         my @headslist;
2690
2691         open my $fd, '-|', git_cmd(), 'for-each-ref',
2692                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2693                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2694                 'refs/heads'
2695                 or return;
2696         while (my $line = <$fd>) {
2697                 my %ref_item;
2698
2699                 chomp $line;
2700                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2701                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2702                 my ($committer, $epoch, $tz) =
2703                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2704                 $ref_item{'fullname'}  = $name;
2705                 $name =~ s!^refs/heads/!!;
2706
2707                 $ref_item{'name'}  = $name;
2708                 $ref_item{'id'}    = $hash;
2709                 $ref_item{'title'} = $title || '(no commit message)';
2710                 $ref_item{'epoch'} = $epoch;
2711                 if ($epoch) {
2712                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2713                 } else {
2714                         $ref_item{'age'} = "unknown";
2715                 }
2716
2717                 push @headslist, \%ref_item;
2718         }
2719         close $fd;
2720
2721         return wantarray ? @headslist : \@headslist;
2722 }
2723
2724 sub git_get_tags_list {
2725         my $limit = shift;
2726         my @tagslist;
2727
2728         open my $fd, '-|', git_cmd(), 'for-each-ref',
2729                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2730                 '--format=%(objectname) %(objecttype) %(refname) '.
2731                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2732                 'refs/tags'
2733                 or return;
2734         while (my $line = <$fd>) {
2735                 my %ref_item;
2736
2737                 chomp $line;
2738                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2739                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2740                 my ($creator, $epoch, $tz) =
2741                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2742                 $ref_item{'fullname'} = $name;
2743                 $name =~ s!^refs/tags/!!;
2744
2745                 $ref_item{'type'} = $type;
2746                 $ref_item{'id'} = $id;
2747                 $ref_item{'name'} = $name;
2748                 if ($type eq "tag") {
2749                         $ref_item{'subject'} = $title;
2750                         $ref_item{'reftype'} = $reftype;
2751                         $ref_item{'refid'}   = $refid;
2752                 } else {
2753                         $ref_item{'reftype'} = $type;
2754                         $ref_item{'refid'}   = $id;
2755                 }
2756
2757                 if ($type eq "tag" || $type eq "commit") {
2758                         $ref_item{'epoch'} = $epoch;
2759                         if ($epoch) {
2760                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2761                         } else {
2762                                 $ref_item{'age'} = "unknown";
2763                         }
2764                 }
2765
2766                 push @tagslist, \%ref_item;
2767         }
2768         close $fd;
2769
2770         return wantarray ? @tagslist : \@tagslist;
2771 }
2772
2773 ## ----------------------------------------------------------------------
2774 ## filesystem-related functions
2775
2776 sub get_file_owner {
2777         my $path = shift;
2778
2779         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2780         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2781         if (!defined $gcos) {
2782                 return undef;
2783         }
2784         my $owner = $gcos;
2785         $owner =~ s/[,;].*$//;
2786         return to_utf8($owner);
2787 }
2788
2789 # assume that file exists
2790 sub insert_file {
2791         my $filename = shift;
2792
2793         open my $fd, '<', $filename;
2794         print map { to_utf8($_) } <$fd>;
2795         close $fd;
2796 }
2797
2798 ## ......................................................................
2799 ## mimetype related functions
2800
2801 sub mimetype_guess_file {
2802         my $filename = shift;
2803         my $mimemap = shift;
2804         -r $mimemap or return undef;
2805
2806         my %mimemap;
2807         open(my $mh, '<', $mimemap) or return undef;
2808         while (<$mh>) {
2809                 next if m/^#/; # skip comments
2810                 my ($mimetype, $exts) = split(/\t+/);
2811                 if (defined $exts) {
2812                         my @exts = split(/\s+/, $exts);
2813                         foreach my $ext (@exts) {
2814                                 $mimemap{$ext} = $mimetype;
2815                         }
2816                 }
2817         }
2818         close($mh);
2819
2820         $filename =~ /\.([^.]*)$/;
2821         return $mimemap{$1};
2822 }
2823
2824 sub mimetype_guess {
2825         my $filename = shift;
2826         my $mime;
2827         $filename =~ /\./ or return undef;
2828
2829         if ($mimetypes_file) {
2830                 my $file = $mimetypes_file;
2831                 if ($file !~ m!^/!) { # if it is relative path
2832                         # it is relative to project
2833                         $file = "$projectroot/$project/$file";
2834                 }
2835                 $mime = mimetype_guess_file($filename, $file);
2836         }
2837         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2838         return $mime;
2839 }
2840
2841 sub blob_mimetype {
2842         my $fd = shift;
2843         my $filename = shift;
2844
2845         if ($filename) {
2846                 my $mime = mimetype_guess($filename);
2847                 $mime and return $mime;
2848         }
2849
2850         # just in case
2851         return $default_blob_plain_mimetype unless $fd;
2852
2853         if (-T $fd) {
2854                 return 'text/plain';
2855         } elsif (! $filename) {
2856                 return 'application/octet-stream';
2857         } elsif ($filename =~ m/\.png$/i) {
2858                 return 'image/png';
2859         } elsif ($filename =~ m/\.gif$/i) {
2860                 return 'image/gif';
2861         } elsif ($filename =~ m/\.jpe?g$/i) {
2862                 return 'image/jpeg';
2863         } else {
2864                 return 'application/octet-stream';
2865         }
2866 }
2867
2868 sub blob_contenttype {
2869         my ($fd, $file_name, $type) = @_;
2870
2871         $type ||= blob_mimetype($fd, $file_name);
2872         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
2873                 $type .= "; charset=$default_text_plain_charset";
2874         }
2875
2876         return $type;
2877 }
2878
2879 ## ======================================================================
2880 ## functions printing HTML: header, footer, error page
2881
2882 sub git_header_html {
2883         my $status = shift || "200 OK";
2884         my $expires = shift;
2885
2886         my $title = "$site_name";
2887         if (defined $project) {
2888                 $title .= " - " . to_utf8($project);
2889                 if (defined $action) {
2890                         $title .= "/$action";
2891                         if (defined $file_name) {
2892                                 $title .= " - " . esc_path($file_name);
2893                                 if ($action eq "tree" && $file_name !~ m|/$|) {
2894                                         $title .= "/";
2895                                 }
2896                         }
2897                 }
2898         }
2899         my $content_type;
2900         # require explicit support from the UA if we are to send the page as
2901         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
2902         # we have to do this because MSIE sometimes globs '*/*', pretending to
2903         # support xhtml+xml but choking when it gets what it asked for.
2904         if (defined $cgi->http('HTTP_ACCEPT') &&
2905             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
2906             $cgi->Accept('application/xhtml+xml') != 0) {
2907                 $content_type = 'application/xhtml+xml';
2908         } else {
2909                 $content_type = 'text/html';
2910         }
2911         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
2912                            -status=> $status, -expires => $expires);
2913         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
2914         print <<EOF;
2915 <?xml version="1.0" encoding="utf-8"?>
2916 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
2917 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
2918 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
2919 <!-- git core binaries version $git_version -->
2920 <head>
2921 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
2922 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
2923 <meta name="robots" content="index, nofollow"/>
2924 <title>$title</title>
2925 EOF
2926         # the stylesheet, favicon etc urls won't work correctly with path_info
2927         # unless we set the appropriate base URL
2928         if ($ENV{'PATH_INFO'}) {
2929                 print "<base href=\"".esc_url($base_url)."\" />\n";
2930         }
2931         # print out each stylesheet that exist, providing backwards capability
2932         # for those people who defined $stylesheet in a config file
2933         if (defined $stylesheet) {
2934                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2935         } else {
2936                 foreach my $stylesheet (@stylesheets) {
2937                         next unless $stylesheet;
2938                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
2939                 }
2940         }
2941         if (defined $project) {
2942                 my %href_params = get_feed_info();
2943                 if (!exists $href_params{'-title'}) {
2944                         $href_params{'-title'} = 'log';
2945                 }
2946
2947                 foreach my $format qw(RSS Atom) {
2948                         my $type = lc($format);
2949                         my %link_attr = (
2950                                 '-rel' => 'alternate',
2951                                 '-title' => "$project - $href_params{'-title'} - $format feed",
2952                                 '-type' => "application/$type+xml"
2953                         );
2954
2955                         $href_params{'action'} = $type;
2956                         $link_attr{'-href'} = href(%href_params);
2957                         print "<link ".
2958                               "rel=\"$link_attr{'-rel'}\" ".
2959                               "title=\"$link_attr{'-title'}\" ".
2960                               "href=\"$link_attr{'-href'}\" ".
2961                               "type=\"$link_attr{'-type'}\" ".
2962                               "/>\n";
2963
2964                         $href_params{'extra_options'} = '--no-merges';
2965                         $link_attr{'-href'} = href(%href_params);
2966                         $link_attr{'-title'} .= ' (no merges)';
2967                         print "<link ".
2968                               "rel=\"$link_attr{'-rel'}\" ".
2969                               "title=\"$link_attr{'-title'}\" ".
2970                               "href=\"$link_attr{'-href'}\" ".
2971                               "type=\"$link_attr{'-type'}\" ".
2972                               "/>\n";
2973                 }
2974
2975         } else {
2976                 printf('<link rel="alternate" title="%s projects list" '.
2977                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
2978                        $site_name, href(project=>undef, action=>"project_index"));
2979                 printf('<link rel="alternate" title="%s projects feeds" '.
2980                        'href="%s" type="text/x-opml" />'."\n",
2981                        $site_name, href(project=>undef, action=>"opml"));
2982         }
2983         if (defined $favicon) {
2984                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
2985         }
2986
2987         print "</head>\n" .
2988               "<body>\n";
2989
2990         if (-f $site_header) {
2991                 insert_file($site_header);
2992         }
2993
2994         print "<div class=\"page_header\">\n" .
2995               $cgi->a({-href => esc_url($logo_url),
2996                        -title => $logo_label},
2997                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
2998         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
2999         if (defined $project) {
3000                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3001                 if (defined $action) {
3002                         print " / $action";
3003                 }
3004                 print "\n";
3005         }
3006         print "</div>\n";
3007
3008         my $have_search = gitweb_check_feature('search');
3009         if (defined $project && $have_search) {
3010                 if (!defined $searchtext) {
3011                         $searchtext = "";
3012                 }
3013                 my $search_hash;
3014                 if (defined $hash_base) {
3015                         $search_hash = $hash_base;
3016                 } elsif (defined $hash) {
3017                         $search_hash = $hash;
3018                 } else {
3019                         $search_hash = "HEAD";
3020                 }
3021                 my $action = $my_uri;
3022                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3023                 if ($use_pathinfo) {
3024                         $action .= "/".esc_url($project);
3025                 }
3026                 print $cgi->startform(-method => "get", -action => $action) .
3027                       "<div class=\"search\">\n" .
3028                       (!$use_pathinfo &&
3029                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3030                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3031                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3032                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3033                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3034                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3035                       " search:\n",
3036                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3037                       "<span title=\"Extended regular expression\">" .
3038                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3039                                      -checked => $search_use_regexp) .
3040                       "</span>" .
3041                       "</div>" .
3042                       $cgi->end_form() . "\n";
3043         }
3044 }
3045
3046 sub git_footer_html {
3047         my $feed_class = 'rss_logo';
3048
3049         print "<div class=\"page_footer\">\n";
3050         if (defined $project) {
3051                 my $descr = git_get_project_description($project);
3052                 if (defined $descr) {
3053                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3054                 }
3055
3056                 my %href_params = get_feed_info();
3057                 if (!%href_params) {
3058                         $feed_class .= ' generic';
3059                 }
3060                 $href_params{'-title'} ||= 'log';
3061
3062                 foreach my $format qw(RSS Atom) {
3063                         $href_params{'action'} = lc($format);
3064                         print $cgi->a({-href => href(%href_params),
3065                                       -title => "$href_params{'-title'} $format feed",
3066                                       -class => $feed_class}, $format)."\n";
3067                 }
3068
3069         } else {
3070                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3071                               -class => $feed_class}, "OPML") . " ";
3072                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3073                               -class => $feed_class}, "TXT") . "\n";
3074         }
3075         print "</div>\n"; # class="page_footer"
3076
3077         if (-f $site_footer) {
3078                 insert_file($site_footer);
3079         }
3080
3081         print "</body>\n" .
3082               "</html>";
3083 }
3084
3085 # die_error(<http_status_code>, <error_message>)
3086 # Example: die_error(404, 'Hash not found')
3087 # By convention, use the following status codes (as defined in RFC 2616):
3088 # 400: Invalid or missing CGI parameters, or
3089 #      requested object exists but has wrong type.
3090 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3091 #      this server or project.
3092 # 404: Requested object/revision/project doesn't exist.
3093 # 500: The server isn't configured properly, or
3094 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3095 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3096 sub die_error {
3097         my $status = shift || 500;
3098         my $error = shift || "Internal server error";
3099
3100         my %http_responses = (400 => '400 Bad Request',
3101                               403 => '403 Forbidden',
3102                               404 => '404 Not Found',
3103                               500 => '500 Internal Server Error');
3104         git_header_html($http_responses{$status});
3105         print <<EOF;
3106 <div class="page_body">
3107 <br /><br />
3108 $status - $error
3109 <br />
3110 </div>
3111 EOF
3112         git_footer_html();
3113         exit;
3114 }
3115
3116 ## ----------------------------------------------------------------------
3117 ## functions printing or outputting HTML: navigation
3118
3119 sub git_print_page_nav {
3120         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3121         $extra = '' if !defined $extra; # pager or formats
3122
3123         my @navs = qw(summary shortlog log commit commitdiff tree);
3124         if ($suppress) {
3125                 @navs = grep { $_ ne $suppress } @navs;
3126         }
3127
3128         my %arg = map { $_ => {action=>$_} } @navs;
3129         if (defined $head) {
3130                 for (qw(commit commitdiff)) {
3131                         $arg{$_}{'hash'} = $head;
3132                 }
3133                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3134                         for (qw(shortlog log)) {
3135                                 $arg{$_}{'hash'} = $head;
3136                         }
3137                 }
3138         }
3139
3140         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3141         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3142
3143         my @actions = gitweb_get_feature('actions');
3144         my %repl = (
3145                 '%' => '%',
3146                 'n' => $project,         # project name
3147                 'f' => $git_dir,         # project path within filesystem
3148                 'h' => $treehead || '',  # current hash ('h' parameter)
3149                 'b' => $treebase || '',  # hash base ('hb' parameter)
3150         );
3151         while (@actions) {
3152                 my ($label, $link, $pos) = splice(@actions,0,3);
3153                 # insert
3154                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3155                 # munch munch
3156                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3157                 $arg{$label}{'_href'} = $link;
3158         }
3159
3160         print "<div class=\"page_nav\">\n" .
3161                 (join " | ",
3162                  map { $_ eq $current ?
3163                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3164                  } @navs);
3165         print "<br/>\n$extra<br/>\n" .
3166               "</div>\n";
3167 }
3168
3169 sub format_paging_nav {
3170         my ($action, $hash, $head, $page, $has_next_link) = @_;
3171         my $paging_nav;
3172
3173
3174         if ($hash ne $head || $page) {
3175                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3176         } else {
3177                 $paging_nav .= "HEAD";
3178         }
3179
3180         if ($page > 0) {
3181                 $paging_nav .= " &sdot; " .
3182                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3183                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3184         } else {
3185                 $paging_nav .= " &sdot; prev";
3186         }
3187
3188         if ($has_next_link) {
3189                 $paging_nav .= " &sdot; " .
3190                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3191                                  -accesskey => "n", -title => "Alt-n"}, "next");
3192         } else {
3193                 $paging_nav .= " &sdot; next";
3194         }
3195
3196         return $paging_nav;
3197 }
3198
3199 ## ......................................................................
3200 ## functions printing or outputting HTML: div
3201
3202 sub git_print_header_div {
3203         my ($action, $title, $hash, $hash_base) = @_;
3204         my %args = ();
3205
3206         $args{'action'} = $action;
3207         $args{'hash'} = $hash if $hash;
3208         $args{'hash_base'} = $hash_base if $hash_base;
3209
3210         print "<div class=\"header\">\n" .
3211               $cgi->a({-href => href(%args), -class => "title"},
3212               $title ? $title : $action) .
3213               "\n</div>\n";
3214 }
3215
3216 sub git_print_authorship {
3217         my $co = shift;
3218
3219         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3220         print "<div class=\"author_date\">" .
3221               esc_html($co->{'author_name'}) .
3222               " [$ad{'rfc2822'}";
3223         if ($ad{'hour_local'} < 6) {
3224                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3225                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3226         } else {
3227                 printf(" (%02d:%02d %s)",
3228                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
3229         }
3230         print "]</div>\n";
3231 }
3232
3233 sub git_print_page_path {
3234         my $name = shift;
3235         my $type = shift;
3236         my $hb = shift;
3237
3238
3239         print "<div class=\"page_path\">";
3240         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3241                       -title => 'tree root'}, to_utf8("[$project]"));
3242         print " / ";
3243         if (defined $name) {
3244                 my @dirname = split '/', $name;
3245                 my $basename = pop @dirname;
3246                 my $fullname = '';
3247
3248                 foreach my $dir (@dirname) {
3249                         $fullname .= ($fullname ? '/' : '') . $dir;
3250                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3251                                                      hash_base=>$hb),
3252                                       -title => $fullname}, esc_path($dir));
3253                         print " / ";
3254                 }
3255                 if (defined $type && $type eq 'blob') {
3256                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3257                                                      hash_base=>$hb),
3258                                       -title => $name}, esc_path($basename));
3259                 } elsif (defined $type && $type eq 'tree') {
3260                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3261                                                      hash_base=>$hb),
3262                                       -title => $name}, esc_path($basename));
3263                         print " / ";
3264                 } else {
3265                         print esc_path($basename);
3266                 }
3267         }
3268         print "<br/></div>\n";
3269 }
3270
3271 sub git_print_log {
3272         my $log = shift;
3273         my %opts = @_;
3274
3275         if ($opts{'-remove_title'}) {
3276                 # remove title, i.e. first line of log
3277                 shift @$log;
3278         }
3279         # remove leading empty lines
3280         while (defined $log->[0] && $log->[0] eq "") {
3281                 shift @$log;
3282         }
3283
3284         # print log
3285         my $signoff = 0;
3286         my $empty = 0;
3287         foreach my $line (@$log) {
3288                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3289                         $signoff = 1;
3290                         $empty = 0;
3291                         if (! $opts{'-remove_signoff'}) {
3292                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3293                                 next;
3294                         } else {
3295                                 # remove signoff lines
3296                                 next;
3297                         }
3298                 } else {
3299                         $signoff = 0;
3300                 }
3301
3302                 # print only one empty line
3303                 # do not print empty line after signoff
3304                 if ($line eq "") {
3305                         next if ($empty || $signoff);
3306                         $empty = 1;
3307                 } else {
3308                         $empty = 0;
3309                 }
3310
3311                 print format_log_line_html($line) . "<br/>\n";
3312         }
3313
3314         if ($opts{'-final_empty_line'}) {
3315                 # end with single empty line
3316                 print "<br/>\n" unless $empty;
3317         }
3318 }
3319
3320 # return link target (what link points to)
3321 sub git_get_link_target {
3322         my $hash = shift;
3323         my $link_target;
3324
3325         # read link
3326         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3327                 or return;
3328         {
3329                 local $/ = undef;
3330                 $link_target = <$fd>;
3331         }
3332         close $fd
3333                 or return;
3334
3335         return $link_target;
3336 }
3337
3338 # given link target, and the directory (basedir) the link is in,
3339 # return target of link relative to top directory (top tree);
3340 # return undef if it is not possible (including absolute links).
3341 sub normalize_link_target {
3342         my ($link_target, $basedir, $hash_base) = @_;
3343
3344         # we can normalize symlink target only if $hash_base is provided
3345         return unless $hash_base;
3346
3347         # absolute symlinks (beginning with '/') cannot be normalized
3348         return if (substr($link_target, 0, 1) eq '/');
3349
3350         # normalize link target to path from top (root) tree (dir)
3351         my $path;
3352         if ($basedir) {
3353                 $path = $basedir . '/' . $link_target;
3354         } else {
3355                 # we are in top (root) tree (dir)
3356                 $path = $link_target;
3357         }
3358
3359         # remove //, /./, and /../
3360         my @path_parts;
3361         foreach my $part (split('/', $path)) {
3362                 # discard '.' and ''
3363                 next if (!$part || $part eq '.');
3364                 # handle '..'
3365                 if ($part eq '..') {
3366                         if (@path_parts) {
3367                                 pop @path_parts;
3368                         } else {
3369                                 # link leads outside repository (outside top dir)
3370                                 return;
3371                         }
3372                 } else {
3373                         push @path_parts, $part;
3374                 }
3375         }
3376         $path = join('/', @path_parts);
3377
3378         return $path;
3379 }
3380
3381 # print tree entry (row of git_tree), but without encompassing <tr> element
3382 sub git_print_tree_entry {
3383         my ($t, $basedir, $hash_base, $have_blame) = @_;
3384
3385         my %base_key = ();
3386         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3387
3388         # The format of a table row is: mode list link.  Where mode is
3389         # the mode of the entry, list is the name of the entry, an href,
3390         # and link is the action links of the entry.
3391
3392         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3393         if ($t->{'type'} eq "blob") {
3394                 print "<td class=\"list\">" .
3395                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3396                                                file_name=>"$basedir$t->{'name'}", %base_key),
3397                                 -class => "list"}, esc_path($t->{'name'}));
3398                 if (S_ISLNK(oct $t->{'mode'})) {
3399                         my $link_target = git_get_link_target($t->{'hash'});
3400                         if ($link_target) {
3401                                 my $norm_target = normalize_link_target($link_target, $basedir, $hash_base);
3402                                 if (defined $norm_target) {
3403                                         print " -> " .
3404                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3405                                                                      file_name=>$norm_target),
3406                                                        -title => $norm_target}, esc_path($link_target));
3407                                 } else {
3408                                         print " -> " . esc_path($link_target);
3409                                 }
3410                         }
3411                 }
3412                 print "</td>\n";
3413                 print "<td class=\"link\">";
3414                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3415                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3416                               "blob");
3417                 if ($have_blame) {
3418                         print " | " .
3419                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3420                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3421                                       "blame");
3422                 }
3423                 if (defined $hash_base) {
3424                         print " | " .
3425                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3426                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3427                                       "history");
3428                 }
3429                 print " | " .
3430                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3431                                                file_name=>"$basedir$t->{'name'}")},
3432                                 "raw");
3433                 print "</td>\n";
3434
3435         } elsif ($t->{'type'} eq "tree") {
3436                 print "<td class=\"list\">";
3437                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3438                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3439                               esc_path($t->{'name'}));
3440                 print "</td>\n";
3441                 print "<td class=\"link\">";
3442                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3443                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3444                               "tree");
3445                 if (defined $hash_base) {
3446                         print " | " .
3447                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3448                                                      file_name=>"$basedir$t->{'name'}")},
3449                                       "history");
3450                 }
3451                 print "</td>\n";
3452         } else {
3453                 # unknown object: we can only present history for it
3454                 # (this includes 'commit' object, i.e. submodule support)
3455                 print "<td class=\"list\">" .
3456                       esc_path($t->{'name'}) .
3457                       "</td>\n";
3458                 print "<td class=\"link\">";
3459                 if (defined $hash_base) {
3460                         print $cgi->a({-href => href(action=>"history",
3461                                                      hash_base=>$hash_base,
3462                                                      file_name=>"$basedir$t->{'name'}")},
3463                                       "history");
3464                 }
3465                 print "</td>\n";
3466         }
3467 }
3468
3469 ## ......................................................................
3470 ## functions printing large fragments of HTML
3471
3472 # get pre-image filenames for merge (combined) diff
3473 sub fill_from_file_info {
3474         my ($diff, @parents) = @_;
3475
3476         $diff->{'from_file'} = [ ];
3477         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3478         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3479                 if ($diff->{'status'}[$i] eq 'R' ||
3480                     $diff->{'status'}[$i] eq 'C') {
3481                         $diff->{'from_file'}[$i] =
3482                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3483                 }
3484         }
3485
3486         return $diff;
3487 }
3488
3489 # is current raw difftree line of file deletion
3490 sub is_deleted {
3491         my $diffinfo = shift;
3492
3493         return $diffinfo->{'to_id'} eq ('0' x 40);
3494 }
3495
3496 # does patch correspond to [previous] difftree raw line
3497 # $diffinfo  - hashref of parsed raw diff format
3498 # $patchinfo - hashref of parsed patch diff format
3499 #              (the same keys as in $diffinfo)
3500 sub is_patch_split {
3501         my ($diffinfo, $patchinfo) = @_;
3502
3503         return defined $diffinfo && defined $patchinfo
3504                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3505 }
3506
3507
3508 sub git_difftree_body {
3509         my ($difftree, $hash, @parents) = @_;
3510         my ($parent) = $parents[0];
3511         my $have_blame = gitweb_check_feature('blame');
3512         print "<div class=\"list_head\">\n";
3513         if ($#{$difftree} > 10) {
3514                 print(($#{$difftree} + 1) . " files changed:\n");
3515         }
3516         print "</div>\n";
3517
3518         print "<table class=\"" .
3519               (@parents > 1 ? "combined " : "") .
3520               "diff_tree\">\n";
3521
3522         # header only for combined diff in 'commitdiff' view
3523         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3524         if ($has_header) {
3525                 # table header
3526                 print "<thead><tr>\n" .
3527                        "<th></th><th></th>\n"; # filename, patchN link
3528                 for (my $i = 0; $i < @parents; $i++) {
3529                         my $par = $parents[$i];
3530                         print "<th>" .
3531                               $cgi->a({-href => href(action=>"commitdiff",
3532                                                      hash=>$hash, hash_parent=>$par),
3533                                        -title => 'commitdiff to parent number ' .
3534                                                   ($i+1) . ': ' . substr($par,0,7)},
3535                                       $i+1) .
3536                               "&nbsp;</th>\n";
3537                 }
3538                 print "</tr></thead>\n<tbody>\n";
3539         }
3540
3541         my $alternate = 1;
3542         my $patchno = 0;
3543         foreach my $line (@{$difftree}) {
3544                 my $diff = parsed_difftree_line($line);
3545
3546                 if ($alternate) {
3547                         print "<tr class=\"dark\">\n";
3548                 } else {
3549                         print "<tr class=\"light\">\n";
3550                 }
3551                 $alternate ^= 1;
3552
3553                 if (exists $diff->{'nparents'}) { # combined diff
3554
3555                         fill_from_file_info($diff, @parents)
3556                                 unless exists $diff->{'from_file'};
3557
3558                         if (!is_deleted($diff)) {
3559                                 # file exists in the result (child) commit
3560                                 print "<td>" .
3561                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3562                                                              file_name=>$diff->{'to_file'},
3563                                                              hash_base=>$hash),
3564                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3565                                       "</td>\n";
3566                         } else {
3567                                 print "<td>" .
3568                                       esc_path($diff->{'to_file'}) .
3569                                       "</td>\n";
3570                         }
3571
3572                         if ($action eq 'commitdiff') {
3573                                 # link to patch
3574                                 $patchno++;
3575                                 print "<td class=\"link\">" .
3576                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3577                                       " | " .
3578                                       "</td>\n";
3579                         }
3580
3581                         my $has_history = 0;
3582                         my $not_deleted = 0;
3583                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3584                                 my $hash_parent = $parents[$i];
3585                                 my $from_hash = $diff->{'from_id'}[$i];
3586                                 my $from_path = $diff->{'from_file'}[$i];
3587                                 my $status = $diff->{'status'}[$i];
3588
3589                                 $has_history ||= ($status ne 'A');
3590                                 $not_deleted ||= ($status ne 'D');
3591
3592                                 if ($status eq 'A') {
3593                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3594                                 } elsif ($status eq 'D') {
3595                                         print "<td class=\"link\">" .
3596                                               $cgi->a({-href => href(action=>"blob",
3597                                                                      hash_base=>$hash,
3598                                                                      hash=>$from_hash,
3599                                                                      file_name=>$from_path)},
3600                                                       "blob" . ($i+1)) .
3601                                               " | </td>\n";
3602                                 } else {
3603                                         if ($diff->{'to_id'} eq $from_hash) {
3604                                                 print "<td class=\"link nochange\">";
3605                                         } else {
3606                                                 print "<td class=\"link\">";
3607                                         }
3608                                         print $cgi->a({-href => href(action=>"blobdiff",
3609                                                                      hash=>$diff->{'to_id'},
3610                                                                      hash_parent=>$from_hash,
3611                                                                      hash_base=>$hash,
3612                                                                      hash_parent_base=>$hash_parent,
3613                                                                      file_name=>$diff->{'to_file'},
3614                                                                      file_parent=>$from_path)},
3615                                                       "diff" . ($i+1)) .
3616                                               " | </td>\n";
3617                                 }
3618                         }
3619
3620                         print "<td class=\"link\">";
3621                         if ($not_deleted) {
3622                                 print $cgi->a({-href => href(action=>"blob",
3623                                                              hash=>$diff->{'to_id'},
3624                                                              file_name=>$diff->{'to_file'},
3625                                                              hash_base=>$hash)},
3626                                               "blob");
3627                                 print " | " if ($has_history);
3628                         }
3629                         if ($has_history) {
3630                                 print $cgi->a({-href => href(action=>"history",
3631                                                              file_name=>$diff->{'to_file'},
3632                                                              hash_base=>$hash)},
3633                                               "history");
3634                         }
3635                         print "</td>\n";
3636
3637                         print "</tr>\n";
3638                         next; # instead of 'else' clause, to avoid extra indent
3639                 }
3640                 # else ordinary diff
3641
3642                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3643                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3644                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3645                         $to_mode_oct = oct $diff->{'to_mode'};
3646                         if (S_ISREG($to_mode_oct)) { # only for regular file
3647                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3648                         }
3649                         $to_file_type = file_type($diff->{'to_mode'});
3650                 }
3651                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3652                         $from_mode_oct = oct $diff->{'from_mode'};
3653                         if (S_ISREG($to_mode_oct)) { # only for regular file
3654                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3655                         }
3656                         $from_file_type = file_type($diff->{'from_mode'});
3657                 }
3658
3659                 if ($diff->{'status'} eq "A") { # created
3660                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3661                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3662                         $mode_chng   .= "]</span>";
3663                         print "<td>";
3664                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3665                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3666                                       -class => "list"}, esc_path($diff->{'file'}));
3667                         print "</td>\n";
3668                         print "<td>$mode_chng</td>\n";
3669                         print "<td class=\"link\">";
3670                         if ($action eq 'commitdiff') {
3671                                 # link to patch
3672                                 $patchno++;
3673                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3674                                 print " | ";
3675                         }
3676                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3677                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3678                                       "blob");
3679                         print "</td>\n";
3680
3681                 } elsif ($diff->{'status'} eq "D") { # deleted
3682                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3683                         print "<td>";
3684                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3685                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3686                                        -class => "list"}, esc_path($diff->{'file'}));
3687                         print "</td>\n";
3688                         print "<td>$mode_chng</td>\n";
3689                         print "<td class=\"link\">";
3690                         if ($action eq 'commitdiff') {
3691                                 # link to patch
3692                                 $patchno++;
3693                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3694                                 print " | ";
3695                         }
3696                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3697                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3698                                       "blob") . " | ";
3699                         if ($have_blame) {
3700                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3701                                                              file_name=>$diff->{'file'})},
3702                                               "blame") . " | ";
3703                         }
3704                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3705                                                      file_name=>$diff->{'file'})},
3706                                       "history");
3707                         print "</td>\n";
3708
3709                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3710                         my $mode_chnge = "";
3711                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3712                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3713                                 if ($from_file_type ne $to_file_type) {
3714                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3715                                 }
3716                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3717                                         if ($from_mode_str && $to_mode_str) {
3718                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3719                                         } elsif ($to_mode_str) {
3720                                                 $mode_chnge .= " mode: $to_mode_str";
3721                                         }
3722                                 }
3723                                 $mode_chnge .= "]</span>\n";
3724                         }
3725                         print "<td>";
3726                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3727                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3728                                       -class => "list"}, esc_path($diff->{'file'}));
3729                         print "</td>\n";
3730                         print "<td>$mode_chnge</td>\n";
3731                         print "<td class=\"link\">";
3732                         if ($action eq 'commitdiff') {
3733                                 # link to patch
3734                                 $patchno++;
3735                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3736                                       " | ";
3737                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3738                                 # "commit" view and modified file (not onlu mode changed)
3739                                 print $cgi->a({-href => href(action=>"blobdiff",
3740                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3741                                                              hash_base=>$hash, hash_parent_base=>$parent,
3742                                                              file_name=>$diff->{'file'})},
3743                                               "diff") .
3744                                       " | ";
3745                         }
3746                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3747                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3748                                        "blob") . " | ";
3749                         if ($have_blame) {
3750                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3751                                                              file_name=>$diff->{'file'})},
3752                                               "blame") . " | ";
3753                         }
3754                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3755                                                      file_name=>$diff->{'file'})},
3756                                       "history");
3757                         print "</td>\n";
3758
3759                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3760                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3761                         my $nstatus = $status_name{$diff->{'status'}};
3762                         my $mode_chng = "";
3763                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3764                                 # mode also for directories, so we cannot use $to_mode_str
3765                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3766                         }
3767                         print "<td>" .
3768                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3769                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3770                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3771                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3772                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3773                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3774                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3775                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3776                               "<td class=\"link\">";
3777                         if ($action eq 'commitdiff') {
3778                                 # link to patch
3779                                 $patchno++;
3780                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3781                                       " | ";
3782                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3783                                 # "commit" view and modified file (not only pure rename or copy)
3784                                 print $cgi->a({-href => href(action=>"blobdiff",
3785                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3786                                                              hash_base=>$hash, hash_parent_base=>$parent,
3787                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3788                                               "diff") .
3789                                       " | ";
3790                         }
3791                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3792                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3793                                       "blob") . " | ";
3794                         if ($have_blame) {
3795                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3796                                                              file_name=>$diff->{'to_file'})},
3797                                               "blame") . " | ";
3798                         }
3799                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3800                                                     file_name=>$diff->{'to_file'})},
3801                                       "history");
3802                         print "</td>\n";
3803
3804                 } # we should not encounter Unmerged (U) or Unknown (X) status
3805                 print "</tr>\n";
3806         }
3807         print "</tbody>" if $has_header;
3808         print "</table>\n";
3809 }
3810
3811 sub git_patchset_body {
3812         my ($fd, $difftree, $hash, @hash_parents) = @_;
3813         my ($hash_parent) = $hash_parents[0];
3814
3815         my $is_combined = (@hash_parents > 1);
3816         my $patch_idx = 0;
3817         my $patch_number = 0;
3818         my $patch_line;
3819         my $diffinfo;
3820         my $to_name;
3821         my (%from, %to);
3822
3823         print "<div class=\"patchset\">\n";
3824
3825         # skip to first patch
3826         while ($patch_line = <$fd>) {
3827                 chomp $patch_line;
3828
3829                 last if ($patch_line =~ m/^diff /);
3830         }
3831
3832  PATCH:
3833         while ($patch_line) {
3834
3835                 # parse "git diff" header line
3836                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3837                         # $1 is from_name, which we do not use
3838                         $to_name = unquote($2);
3839                         $to_name =~ s!^b/!!;
3840                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
3841                         # $1 is 'cc' or 'combined', which we do not use
3842                         $to_name = unquote($2);
3843                 } else {
3844                         $to_name = undef;
3845                 }
3846
3847                 # check if current patch belong to current raw line
3848                 # and parse raw git-diff line if needed
3849                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
3850                         # this is continuation of a split patch
3851                         print "<div class=\"patch cont\">\n";
3852                 } else {
3853                         # advance raw git-diff output if needed
3854                         $patch_idx++ if defined $diffinfo;
3855
3856                         # read and prepare patch information
3857                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3858
3859                         # compact combined diff output can have some patches skipped
3860                         # find which patch (using pathname of result) we are at now;
3861                         if ($is_combined) {
3862                                 while ($to_name ne $diffinfo->{'to_file'}) {
3863                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3864                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
3865                                               "</div>\n";  # class="patch"
3866
3867                                         $patch_idx++;
3868                                         $patch_number++;
3869
3870                                         last if $patch_idx > $#$difftree;
3871                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3872                                 }
3873                         }
3874
3875                         # modifies %from, %to hashes
3876                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
3877
3878                         # this is first patch for raw difftree line with $patch_idx index
3879                         # we index @$difftree array from 0, but number patches from 1
3880                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
3881                 }
3882
3883                 # git diff header
3884                 #assert($patch_line =~ m/^diff /) if DEBUG;
3885                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
3886                 $patch_number++;
3887                 # print "git diff" header
3888                 print format_git_diff_header_line($patch_line, $diffinfo,
3889                                                   \%from, \%to);
3890
3891                 # print extended diff header
3892                 print "<div class=\"diff extended_header\">\n";
3893         EXTENDED_HEADER:
3894                 while ($patch_line = <$fd>) {
3895                         chomp $patch_line;
3896
3897                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
3898
3899                         print format_extended_diff_header_line($patch_line, $diffinfo,
3900                                                                \%from, \%to);
3901                 }
3902                 print "</div>\n"; # class="diff extended_header"
3903
3904                 # from-file/to-file diff header
3905                 if (! $patch_line) {
3906                         print "</div>\n"; # class="patch"
3907                         last PATCH;
3908                 }
3909                 next PATCH if ($patch_line =~ m/^diff /);
3910                 #assert($patch_line =~ m/^---/) if DEBUG;
3911
3912                 my $last_patch_line = $patch_line;
3913                 $patch_line = <$fd>;
3914                 chomp $patch_line;
3915                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
3916
3917                 print format_diff_from_to_header($last_patch_line, $patch_line,
3918                                                  $diffinfo, \%from, \%to,
3919                                                  @hash_parents);
3920
3921                 # the patch itself
3922         LINE:
3923                 while ($patch_line = <$fd>) {
3924                         chomp $patch_line;
3925
3926                         next PATCH if ($patch_line =~ m/^diff /);
3927
3928                         print format_diff_line($patch_line, \%from, \%to);
3929                 }
3930
3931         } continue {
3932                 print "</div>\n"; # class="patch"
3933         }
3934
3935         # for compact combined (--cc) format, with chunk and patch simpliciaction
3936         # patchset might be empty, but there might be unprocessed raw lines
3937         for (++$patch_idx if $patch_number > 0;
3938              $patch_idx < @$difftree;
3939              ++$patch_idx) {
3940                 # read and prepare patch information
3941                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
3942
3943                 # generate anchor for "patch" links in difftree / whatchanged part
3944                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
3945                       format_diff_cc_simplified($diffinfo, @hash_parents) .
3946                       "</div>\n";  # class="patch"
3947
3948                 $patch_number++;
3949         }
3950
3951         if ($patch_number == 0) {
3952                 if (@hash_parents > 1) {
3953                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
3954                 } else {
3955                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
3956                 }
3957         }
3958
3959         print "</div>\n"; # class="patchset"
3960 }
3961
3962 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3963
3964 # fills project list info (age, description, owner, forks) for each
3965 # project in the list, removing invalid projects from returned list
3966 # NOTE: modifies $projlist, but does not remove entries from it
3967 sub fill_project_list_info {
3968         my ($projlist, $check_forks) = @_;
3969         my @projects;
3970
3971         my $show_ctags = gitweb_check_feature('ctags');
3972  PROJECT:
3973         foreach my $pr (@$projlist) {
3974                 my (@activity) = git_get_last_activity($pr->{'path'});
3975                 unless (@activity) {
3976                         next PROJECT;
3977                 }
3978                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
3979                 if (!defined $pr->{'descr'}) {
3980                         my $descr = git_get_project_description($pr->{'path'}) || "";
3981                         $descr = to_utf8($descr);
3982                         $pr->{'descr_long'} = $descr;
3983                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
3984                 }
3985                 if (!defined $pr->{'owner'}) {
3986                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
3987                 }
3988                 if ($check_forks) {
3989                         my $pname = $pr->{'path'};
3990                         if (($pname =~ s/\.git$//) &&
3991                             ($pname !~ /\/$/) &&
3992                             (-d "$projectroot/$pname")) {
3993                                 $pr->{'forks'} = "-d $projectroot/$pname";
3994                         } else {
3995                                 $pr->{'forks'} = 0;
3996                         }
3997                 }
3998                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
3999                 push @projects, $pr;
4000         }
4001
4002         return @projects;
4003 }
4004
4005 # print 'sort by' <th> element, generating 'sort by $name' replay link
4006 # if that order is not selected
4007 sub print_sort_th {
4008         my ($name, $order, $header) = @_;
4009         $header ||= ucfirst($name);
4010
4011         if ($order eq $name) {
4012                 print "<th>$header</th>\n";
4013         } else {
4014                 print "<th>" .
4015                       $cgi->a({-href => href(-replay=>1, order=>$name),
4016                                -class => "header"}, $header) .
4017                       "</th>\n";
4018         }
4019 }
4020
4021 sub git_project_list_body {
4022         # actually uses global variable $project
4023         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4024
4025         my $check_forks = gitweb_check_feature('forks');
4026         my @projects = fill_project_list_info($projlist, $check_forks);
4027
4028         $order ||= $default_projects_order;
4029         $from = 0 unless defined $from;
4030         $to = $#projects if (!defined $to || $#projects < $to);
4031
4032         my %order_info = (
4033                 project => { key => 'path', type => 'str' },
4034                 descr => { key => 'descr_long', type => 'str' },
4035                 owner => { key => 'owner', type => 'str' },
4036                 age => { key => 'age', type => 'num' }
4037         );
4038         my $oi = $order_info{$order};
4039         if ($oi->{'type'} eq 'str') {
4040                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4041         } else {
4042                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4043         }
4044
4045         my $show_ctags = gitweb_check_feature('ctags');
4046         if ($show_ctags) {
4047                 my %ctags;
4048                 foreach my $p (@projects) {
4049                         foreach my $ct (keys %{$p->{'ctags'}}) {
4050                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4051                         }
4052                 }
4053                 my $cloud = git_populate_project_tagcloud(\%ctags);
4054                 print git_show_project_tagcloud($cloud, 64);
4055         }
4056
4057         print "<table class=\"project_list\">\n";
4058         unless ($no_header) {
4059                 print "<tr>\n";
4060                 if ($check_forks) {
4061                         print "<th></th>\n";
4062                 }
4063                 print_sort_th('project', $order, 'Project');
4064                 print_sort_th('descr', $order, 'Description');
4065                 print_sort_th('owner', $order, 'Owner');
4066                 print_sort_th('age', $order, 'Last Change');
4067                 print "<th></th>\n" . # for links
4068                       "</tr>\n";
4069         }
4070         my $alternate = 1;
4071         my $tagfilter = $cgi->param('by_tag');
4072         for (my $i = $from; $i <= $to; $i++) {
4073                 my $pr = $projects[$i];
4074
4075                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4076                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4077                         and not $pr->{'descr_long'} =~ /$searchtext/;
4078                 # Weed out forks or non-matching entries of search
4079                 if ($check_forks) {
4080                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4081                         $forkbase="^$forkbase" if $forkbase;
4082                         next if not $searchtext and not $tagfilter and $show_ctags
4083                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4084                 }
4085
4086                 if ($alternate) {
4087                         print "<tr class=\"dark\">\n";
4088                 } else {
4089                         print "<tr class=\"light\">\n";
4090                 }
4091                 $alternate ^= 1;
4092                 if ($check_forks) {
4093                         print "<td>";
4094                         if ($pr->{'forks'}) {
4095                                 print "<!-- $pr->{'forks'} -->\n";
4096                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4097                         }
4098                         print "</td>\n";
4099                 }
4100                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4101                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4102                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4103                                         -class => "list", -title => $pr->{'descr_long'}},
4104                                         esc_html($pr->{'descr'})) . "</td>\n" .
4105                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4106                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4107                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4108                       "<td class=\"link\">" .
4109                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4110                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4111                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4112                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4113                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4114                       "</td>\n" .
4115                       "</tr>\n";
4116         }
4117         if (defined $extra) {
4118                 print "<tr>\n";
4119                 if ($check_forks) {
4120                         print "<td></td>\n";
4121                 }
4122                 print "<td colspan=\"5\">$extra</td>\n" .
4123                       "</tr>\n";
4124         }
4125         print "</table>\n";
4126 }
4127
4128 sub git_shortlog_body {
4129         # uses global variable $project
4130         my ($commitlist, $from, $to, $refs, $extra) = @_;
4131
4132         $from = 0 unless defined $from;
4133         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4134
4135         print "<table class=\"shortlog\">\n";
4136         my $alternate = 1;
4137         for (my $i = $from; $i <= $to; $i++) {
4138                 my %co = %{$commitlist->[$i]};
4139                 my $commit = $co{'id'};
4140                 my $ref = format_ref_marker($refs, $commit);
4141                 if ($alternate) {
4142                         print "<tr class=\"dark\">\n";
4143                 } else {
4144                         print "<tr class=\"light\">\n";
4145                 }
4146                 $alternate ^= 1;
4147                 my $author = chop_and_escape_str($co{'author_name'}, 10);
4148                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4149                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4150                       "<td><i>" . $author . "</i></td>\n" .
4151                       "<td>";
4152                 print format_subject_html($co{'title'}, $co{'title_short'},
4153                                           href(action=>"commit", hash=>$commit), $ref);
4154                 print "</td>\n" .
4155                       "<td class=\"link\">" .
4156                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4157                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4158                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4159                 my $snapshot_links = format_snapshot_links($commit);
4160                 if (defined $snapshot_links) {
4161                         print " | " . $snapshot_links;
4162                 }
4163                 print "</td>\n" .
4164                       "</tr>\n";
4165         }
4166         if (defined $extra) {
4167                 print "<tr>\n" .
4168                       "<td colspan=\"4\">$extra</td>\n" .
4169                       "</tr>\n";
4170         }
4171         print "</table>\n";
4172 }
4173
4174 sub git_history_body {
4175         # Warning: assumes constant type (blob or tree) during history
4176         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4177
4178         $from = 0 unless defined $from;
4179         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4180
4181         print "<table class=\"history\">\n";
4182         my $alternate = 1;
4183         for (my $i = $from; $i <= $to; $i++) {
4184                 my %co = %{$commitlist->[$i]};
4185                 if (!%co) {
4186                         next;
4187                 }
4188                 my $commit = $co{'id'};
4189
4190                 my $ref = format_ref_marker($refs, $commit);
4191
4192                 if ($alternate) {
4193                         print "<tr class=\"dark\">\n";
4194                 } else {
4195                         print "<tr class=\"light\">\n";
4196                 }
4197                 $alternate ^= 1;
4198         # shortlog uses      chop_str($co{'author_name'}, 10)
4199                 my $author = chop_and_escape_str($co{'author_name'}, 15, 3);
4200                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4201                       "<td><i>" . $author . "</i></td>\n" .
4202                       "<td>";
4203                 # originally git_history used chop_str($co{'title'}, 50)
4204                 print format_subject_html($co{'title'}, $co{'title_short'},
4205                                           href(action=>"commit", hash=>$commit), $ref);
4206                 print "</td>\n" .
4207                       "<td class=\"link\">" .
4208                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4209                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4210
4211                 if ($ftype eq 'blob') {
4212                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4213                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4214                         if (defined $blob_current && defined $blob_parent &&
4215                                         $blob_current ne $blob_parent) {
4216                                 print " | " .
4217                                         $cgi->a({-href => href(action=>"blobdiff",
4218                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4219                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4220                                                                file_name=>$file_name)},
4221                                                 "diff to current");
4222                         }
4223                 }
4224                 print "</td>\n" .
4225                       "</tr>\n";
4226         }
4227         if (defined $extra) {
4228                 print "<tr>\n" .
4229                       "<td colspan=\"4\">$extra</td>\n" .
4230                       "</tr>\n";
4231         }
4232         print "</table>\n";
4233 }
4234
4235 sub git_tags_body {
4236         # uses global variable $project
4237         my ($taglist, $from, $to, $extra) = @_;
4238         $from = 0 unless defined $from;
4239         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4240
4241         print "<table class=\"tags\">\n";
4242         my $alternate = 1;
4243         for (my $i = $from; $i <= $to; $i++) {
4244                 my $entry = $taglist->[$i];
4245                 my %tag = %$entry;
4246                 my $comment = $tag{'subject'};
4247                 my $comment_short;
4248                 if (defined $comment) {
4249                         $comment_short = chop_str($comment, 30, 5);
4250                 }
4251                 if ($alternate) {
4252                         print "<tr class=\"dark\">\n";
4253                 } else {
4254                         print "<tr class=\"light\">\n";
4255                 }
4256                 $alternate ^= 1;
4257                 if (defined $tag{'age'}) {
4258                         print "<td><i>$tag{'age'}</i></td>\n";
4259                 } else {
4260                         print "<td></td>\n";
4261                 }
4262                 print "<td>" .
4263                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4264                                -class => "list name"}, esc_html($tag{'name'})) .
4265                       "</td>\n" .
4266                       "<td>";
4267                 if (defined $comment) {
4268                         print format_subject_html($comment, $comment_short,
4269                                                   href(action=>"tag", hash=>$tag{'id'}));
4270                 }
4271                 print "</td>\n" .
4272                       "<td class=\"selflink\">";
4273                 if ($tag{'type'} eq "tag") {
4274                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4275                 } else {
4276                         print "&nbsp;";
4277                 }
4278                 print "</td>\n" .
4279                       "<td class=\"link\">" . " | " .
4280                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4281                 if ($tag{'reftype'} eq "commit") {
4282                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4283                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4284                 } elsif ($tag{'reftype'} eq "blob") {
4285                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4286                 }
4287                 print "</td>\n" .
4288                       "</tr>";
4289         }
4290         if (defined $extra) {
4291                 print "<tr>\n" .
4292                       "<td colspan=\"5\">$extra</td>\n" .
4293                       "</tr>\n";
4294         }
4295         print "</table>\n";
4296 }
4297
4298 sub git_heads_body {
4299         # uses global variable $project
4300         my ($headlist, $head, $from, $to, $extra) = @_;
4301         $from = 0 unless defined $from;
4302         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4303
4304         print "<table class=\"heads\">\n";
4305         my $alternate = 1;
4306         for (my $i = $from; $i <= $to; $i++) {
4307                 my $entry = $headlist->[$i];
4308                 my %ref = %$entry;
4309                 my $curr = $ref{'id'} eq $head;
4310                 if ($alternate) {
4311                         print "<tr class=\"dark\">\n";
4312                 } else {
4313                         print "<tr class=\"light\">\n";
4314                 }
4315                 $alternate ^= 1;
4316                 print "<td><i>$ref{'age'}</i></td>\n" .
4317                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4318                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4319                                -class => "list name"},esc_html($ref{'name'})) .
4320                       "</td>\n" .
4321                       "<td class=\"link\">" .
4322                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4323                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4324                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4325                       "</td>\n" .
4326                       "</tr>";
4327         }
4328         if (defined $extra) {
4329                 print "<tr>\n" .
4330                       "<td colspan=\"3\">$extra</td>\n" .
4331                       "</tr>\n";
4332         }
4333         print "</table>\n";
4334 }
4335
4336 sub git_search_grep_body {
4337         my ($commitlist, $from, $to, $extra) = @_;
4338         $from = 0 unless defined $from;
4339         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4340
4341         print "<table class=\"commit_search\">\n";
4342         my $alternate = 1;
4343         for (my $i = $from; $i <= $to; $i++) {
4344                 my %co = %{$commitlist->[$i]};
4345                 if (!%co) {
4346                         next;
4347                 }
4348                 my $commit = $co{'id'};
4349                 if ($alternate) {
4350                         print "<tr class=\"dark\">\n";
4351                 } else {
4352                         print "<tr class=\"light\">\n";
4353                 }
4354                 $alternate ^= 1;
4355                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
4356                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4357                       "<td><i>" . $author . "</i></td>\n" .
4358                       "<td>" .
4359                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4360                                -class => "list subject"},
4361                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4362                 my $comment = $co{'comment'};
4363                 foreach my $line (@$comment) {
4364                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4365                                 my ($lead, $match, $trail) = ($1, $2, $3);
4366                                 $match = chop_str($match, 70, 5, 'center');
4367                                 my $contextlen = int((80 - length($match))/2);
4368                                 $contextlen = 30 if ($contextlen > 30);
4369                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4370                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4371
4372                                 $lead  = esc_html($lead);
4373                                 $match = esc_html($match);
4374                                 $trail = esc_html($trail);
4375
4376                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4377                         }
4378                 }
4379                 print "</td>\n" .
4380                       "<td class=\"link\">" .
4381                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4382                       " | " .
4383                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4384                       " | " .
4385                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4386                 print "</td>\n" .
4387                       "</tr>\n";
4388         }
4389         if (defined $extra) {
4390                 print "<tr>\n" .
4391                       "<td colspan=\"3\">$extra</td>\n" .
4392                       "</tr>\n";
4393         }
4394         print "</table>\n";
4395 }
4396
4397 ## ======================================================================
4398 ## ======================================================================
4399 ## actions
4400
4401 sub git_project_list {
4402         my $order = $input_params{'order'};
4403         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4404                 die_error(400, "Unknown order parameter");
4405         }
4406
4407         my @list = git_get_projects_list();
4408         if (!@list) {
4409                 die_error(404, "No projects found");
4410         }
4411
4412         git_header_html();
4413         if (-f $home_text) {
4414                 print "<div class=\"index_include\">\n";
4415                 insert_file($home_text);
4416                 print "</div>\n";
4417         }
4418         print $cgi->startform(-method => "get") .
4419               "<p class=\"projsearch\">Search:\n" .
4420               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4421               "</p>" .
4422               $cgi->end_form() . "\n";
4423         git_project_list_body(\@list, $order);
4424         git_footer_html();
4425 }
4426
4427 sub git_forks {
4428         my $order = $input_params{'order'};
4429         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4430                 die_error(400, "Unknown order parameter");
4431         }
4432
4433         my @list = git_get_projects_list($project);
4434         if (!@list) {
4435                 die_error(404, "No forks found");
4436         }
4437
4438         git_header_html();
4439         git_print_page_nav('','');
4440         git_print_header_div('summary', "$project forks");
4441         git_project_list_body(\@list, $order);
4442         git_footer_html();
4443 }
4444
4445 sub git_project_index {
4446         my @projects = git_get_projects_list($project);
4447
4448         print $cgi->header(
4449                 -type => 'text/plain',
4450                 -charset => 'utf-8',
4451                 -content_disposition => 'inline; filename="index.aux"');
4452
4453         foreach my $pr (@projects) {
4454                 if (!exists $pr->{'owner'}) {
4455                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4456                 }
4457
4458                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4459                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4460                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4461                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4462                 $path  =~ s/ /\+/g;
4463                 $owner =~ s/ /\+/g;
4464
4465                 print "$path $owner\n";
4466         }
4467 }
4468
4469 sub git_summary {
4470         my $descr = git_get_project_description($project) || "none";
4471         my %co = parse_commit("HEAD");
4472         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4473         my $head = $co{'id'};
4474
4475         my $owner = git_get_project_owner($project);
4476
4477         my $refs = git_get_references();
4478         # These get_*_list functions return one more to allow us to see if
4479         # there are more ...
4480         my @taglist  = git_get_tags_list(16);
4481         my @headlist = git_get_heads_list(16);
4482         my @forklist;
4483         my $check_forks = gitweb_check_feature('forks');
4484
4485         if ($check_forks) {
4486                 @forklist = git_get_projects_list($project);
4487         }
4488
4489         git_header_html();
4490         git_print_page_nav('summary','', $head);
4491
4492         print "<div class=\"title\">&nbsp;</div>\n";
4493         print "<table class=\"projects_list\">\n" .
4494               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4495               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4496         if (defined $cd{'rfc2822'}) {
4497                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4498         }
4499
4500         # use per project git URL list in $projectroot/$project/cloneurl
4501         # or make project git URL from git base URL and project name
4502         my $url_tag = "URL";
4503         my @url_list = git_get_project_url_list($project);
4504         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4505         foreach my $git_url (@url_list) {
4506                 next unless $git_url;
4507                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4508                 $url_tag = "";
4509         }
4510
4511         # Tag cloud
4512         my $show_ctags = gitweb_check_feature('ctags');
4513         if ($show_ctags) {
4514                 my $ctags = git_get_project_ctags($project);
4515                 my $cloud = git_populate_project_tagcloud($ctags);
4516                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4517                 print "</td>\n<td>" unless %$ctags;
4518                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4519                 print "</td>\n<td>" if %$ctags;
4520                 print git_show_project_tagcloud($cloud, 48);
4521                 print "</td></tr>";
4522         }
4523
4524         print "</table>\n";
4525
4526         # If XSS prevention is on, we don't include README.html.
4527         # TODO: Allow a readme in some safe format.
4528         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4529                 print "<div class=\"title\">readme</div>\n" .
4530                       "<div class=\"readme\">\n";
4531                 insert_file("$projectroot/$project/README.html");
4532                 print "\n</div>\n"; # class="readme"
4533         }
4534
4535         # we need to request one more than 16 (0..15) to check if
4536         # those 16 are all
4537         my @commitlist = $head ? parse_commits($head, 17) : ();
4538         if (@commitlist) {
4539                 git_print_header_div('shortlog');
4540                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4541                                   $#commitlist <=  15 ? undef :
4542                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4543         }
4544
4545         if (@taglist) {
4546                 git_print_header_div('tags');
4547                 git_tags_body(\@taglist, 0, 15,
4548                               $#taglist <=  15 ? undef :
4549                               $cgi->a({-href => href(action=>"tags")}, "..."));
4550         }
4551
4552         if (@headlist) {
4553                 git_print_header_div('heads');
4554                 git_heads_body(\@headlist, $head, 0, 15,
4555                                $#headlist <= 15 ? undef :
4556                                $cgi->a({-href => href(action=>"heads")}, "..."));
4557         }
4558
4559         if (@forklist) {
4560                 git_print_header_div('forks');
4561                 git_project_list_body(\@forklist, 'age', 0, 15,
4562                                       $#forklist <= 15 ? undef :
4563                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4564                                       'no_header');
4565         }
4566
4567         git_footer_html();
4568 }
4569
4570 sub git_tag {
4571         my $head = git_get_head_hash($project);
4572         git_header_html();
4573         git_print_page_nav('','', $head,undef,$head);
4574         my %tag = parse_tag($hash);
4575
4576         if (! %tag) {
4577                 die_error(404, "Unknown tag object");
4578         }
4579
4580         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4581         print "<div class=\"title_text\">\n" .
4582               "<table class=\"object_header\">\n" .
4583               "<tr>\n" .
4584               "<td>object</td>\n" .
4585               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4586                                $tag{'object'}) . "</td>\n" .
4587               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4588                                               $tag{'type'}) . "</td>\n" .
4589               "</tr>\n";
4590         if (defined($tag{'author'})) {
4591                 my %ad = parse_date($tag{'epoch'}, $tag{'tz'});
4592                 print "<tr><td>author</td><td>" . esc_html($tag{'author'}) . "</td></tr>\n";
4593                 print "<tr><td></td><td>" . $ad{'rfc2822'} .
4594                         sprintf(" (%02d:%02d %s)", $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'}) .
4595                         "</td></tr>\n";
4596         }
4597         print "</table>\n\n" .
4598               "</div>\n";
4599         print "<div class=\"page_body\">";
4600         my $comment = $tag{'comment'};
4601         foreach my $line (@$comment) {
4602                 chomp $line;
4603                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4604         }
4605         print "</div>\n";
4606         git_footer_html();
4607 }
4608
4609 sub git_blame {
4610         # permissions
4611         gitweb_check_feature('blame')
4612                 or die_error(403, "Blame view not allowed");
4613
4614         # error checking
4615         die_error(400, "No file name given") unless $file_name;
4616         $hash_base ||= git_get_head_hash($project);
4617         die_error(404, "Couldn't find base commit") unless $hash_base;
4618         my %co = parse_commit($hash_base)
4619                 or die_error(404, "Commit not found");
4620         my $ftype = "blob";
4621         if (!defined $hash) {
4622                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4623                         or die_error(404, "Error looking up file");
4624         } else {
4625                 $ftype = git_get_type($hash);
4626                 if ($ftype !~ "blob") {
4627                         die_error(400, "Object is not a blob");
4628                 }
4629         }
4630
4631         # run git-blame --porcelain
4632         open my $fd, "-|", git_cmd(), "blame", '-p',
4633                 $hash_base, '--', $file_name
4634                 or die_error(500, "Open git-blame failed");
4635
4636         # page header
4637         git_header_html();
4638         my $formats_nav =
4639                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4640                         "blob") .
4641                 " | " .
4642                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4643                         "history") .
4644                 " | " .
4645                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4646                         "HEAD");
4647         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4648         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4649         git_print_page_path($file_name, $ftype, $hash_base);
4650
4651         # page body
4652         my @rev_color = qw(light2 dark2);
4653         my $num_colors = scalar(@rev_color);
4654         my $current_color = 0;
4655         my %metainfo = ();
4656
4657         print <<HTML;
4658 <div class="page_body">
4659 <table class="blame">
4660 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4661 HTML
4662  LINE:
4663         while (my $line = <$fd>) {
4664                 chomp $line;
4665                 # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
4666                 # no <lines in group> for subsequent lines in group of lines
4667                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4668                    ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
4669                 if (!exists $metainfo{$full_rev}) {
4670                         $metainfo{$full_rev} = {};
4671                 }
4672                 my $meta = $metainfo{$full_rev};
4673                 my $data;
4674                 while ($data = <$fd>) {
4675                         chomp $data;
4676                         last if ($data =~ s/^\t//); # contents of line
4677                         if ($data =~ /^(\S+) (.*)$/) {
4678                                 $meta->{$1} = $2;
4679                         }
4680                 }
4681                 my $short_rev = substr($full_rev, 0, 8);
4682                 my $author = $meta->{'author'};
4683                 my %date =
4684                         parse_date($meta->{'author-time'}, $meta->{'author-tz'});
4685                 my $date = $date{'iso-tz'};
4686                 if ($group_size) {
4687                         $current_color = ($current_color + 1) % $num_colors;
4688                 }
4689                 print "<tr id=\"l$lineno\" class=\"$rev_color[$current_color]\">\n";
4690                 if ($group_size) {
4691                         print "<td class=\"sha1\"";
4692                         print " title=\"". esc_html($author) . ", $date\"";
4693                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4694                         print ">";
4695                         print $cgi->a({-href => href(action=>"commit",
4696                                                      hash=>$full_rev,
4697                                                      file_name=>$file_name)},
4698                                       esc_html($short_rev));
4699                         print "</td>\n";
4700                 }
4701                 my $parent_commit;
4702                 if (!exists $meta->{'parent'}) {
4703                         open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4704                                 or die_error(500, "Open git-rev-parse failed");
4705                         $parent_commit = <$dd>;
4706                         close $dd;
4707                         chomp($parent_commit);
4708                         $meta->{'parent'} = $parent_commit;
4709                 } else {
4710                         $parent_commit = $meta->{'parent'};
4711                 }
4712                 my $blamed = href(action => 'blame',
4713                                   file_name => $meta->{'filename'},
4714                                   hash_base => $parent_commit);
4715                 print "<td class=\"linenr\">";
4716                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4717                                 -class => "linenr" },
4718                               esc_html($lineno));
4719                 print "</td>";
4720                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4721                 print "</tr>\n";
4722         }
4723         print "</table>\n";
4724         print "</div>";
4725         close $fd
4726                 or print "Reading blob failed\n";
4727
4728         # page footer
4729         git_footer_html();
4730 }
4731
4732 sub git_tags {
4733         my $head = git_get_head_hash($project);
4734         git_header_html();
4735         git_print_page_nav('','', $head,undef,$head);
4736         git_print_header_div('summary', $project);
4737
4738         my @tagslist = git_get_tags_list();
4739         if (@tagslist) {
4740                 git_tags_body(\@tagslist);
4741         }
4742         git_footer_html();
4743 }
4744
4745 sub git_heads {
4746         my $head = git_get_head_hash($project);
4747         git_header_html();
4748         git_print_page_nav('','', $head,undef,$head);
4749         git_print_header_div('summary', $project);
4750
4751         my @headslist = git_get_heads_list();
4752         if (@headslist) {
4753                 git_heads_body(\@headslist, $head);
4754         }
4755         git_footer_html();
4756 }
4757
4758 sub git_blob_plain {
4759         my $type = shift;
4760         my $expires;
4761
4762         if (!defined $hash) {
4763                 if (defined $file_name) {
4764                         my $base = $hash_base || git_get_head_hash($project);
4765                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4766                                 or die_error(404, "Cannot find file");
4767                 } else {
4768                         die_error(400, "No file name defined");
4769                 }
4770         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4771                 # blobs defined by non-textual hash id's can be cached
4772                 $expires = "+1d";
4773         }
4774
4775         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4776                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4777
4778         # content-type (can include charset)
4779         $type = blob_contenttype($fd, $file_name, $type);
4780
4781         # "save as" filename, even when no $file_name is given
4782         my $save_as = "$hash";
4783         if (defined $file_name) {
4784                 $save_as = $file_name;
4785         } elsif ($type =~ m/^text\//) {
4786                 $save_as .= '.txt';
4787         }
4788
4789         # With XSS prevention on, blobs of all types except a few known safe
4790         # ones are served with "Content-Disposition: attachment" to make sure
4791         # they don't run in our security domain.  For certain image types,
4792         # blob view writes an <img> tag referring to blob_plain view, and we
4793         # want to be sure not to break that by serving the image as an
4794         # attachment (though Firefox 3 doesn't seem to care).
4795         my $sandbox = $prevent_xss &&
4796                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
4797
4798         print $cgi->header(
4799                 -type => $type,
4800                 -expires => $expires,
4801                 -content_disposition =>
4802                         ($sandbox ? 'attachment' : 'inline')
4803                         . '; filename="' . $save_as . '"');
4804         local $/ = undef;
4805         binmode STDOUT, ':raw';
4806         print <$fd>;
4807         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4808         close $fd;
4809 }
4810
4811 sub git_blob {
4812         my $expires;
4813
4814         if (!defined $hash) {
4815                 if (defined $file_name) {
4816                         my $base = $hash_base || git_get_head_hash($project);
4817                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4818                                 or die_error(404, "Cannot find file");
4819                 } else {
4820                         die_error(400, "No file name defined");
4821                 }
4822         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4823                 # blobs defined by non-textual hash id's can be cached
4824                 $expires = "+1d";
4825         }
4826
4827         my $have_blame = gitweb_check_feature('blame');
4828         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4829                 or die_error(500, "Couldn't cat $file_name, $hash");
4830         my $mimetype = blob_mimetype($fd, $file_name);
4831         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4832                 close $fd;
4833                 return git_blob_plain($mimetype);
4834         }
4835         # we can have blame only for text/* mimetype
4836         $have_blame &&= ($mimetype =~ m!^text/!);
4837
4838         git_header_html(undef, $expires);
4839         my $formats_nav = '';
4840         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4841                 if (defined $file_name) {
4842                         if ($have_blame) {
4843                                 $formats_nav .=
4844                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4845                                                 "blame") .
4846                                         " | ";
4847                         }
4848                         $formats_nav .=
4849                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4850                                         "history") .
4851                                 " | " .
4852                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4853                                         "raw") .
4854                                 " | " .
4855                                 $cgi->a({-href => href(action=>"blob",
4856                                                        hash_base=>"HEAD", file_name=>$file_name)},
4857                                         "HEAD");
4858                 } else {
4859                         $formats_nav .=
4860                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
4861                                         "raw");
4862                 }
4863                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4864                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4865         } else {
4866                 print "<div class=\"page_nav\">\n" .
4867                       "<br/><br/></div>\n" .
4868                       "<div class=\"title\">$hash</div>\n";
4869         }
4870         git_print_page_path($file_name, "blob", $hash_base);
4871         print "<div class=\"page_body\">\n";
4872         if ($mimetype =~ m!^image/!) {
4873                 print qq!<img type="$mimetype"!;
4874                 if ($file_name) {
4875                         print qq! alt="$file_name" title="$file_name"!;
4876                 }
4877                 print qq! src="! .
4878                       href(action=>"blob_plain", hash=>$hash,
4879                            hash_base=>$hash_base, file_name=>$file_name) .
4880                       qq!" />\n!;
4881         } else {
4882                 my $nr;
4883                 while (my $line = <$fd>) {
4884                         chomp $line;
4885                         $nr++;
4886                         $line = untabify($line);
4887                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
4888                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
4889                 }
4890         }
4891         close $fd
4892                 or print "Reading blob failed.\n";
4893         print "</div>";
4894         git_footer_html();
4895 }
4896
4897 sub git_tree {
4898         if (!defined $hash_base) {
4899                 $hash_base = "HEAD";
4900         }
4901         if (!defined $hash) {
4902                 if (defined $file_name) {
4903                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
4904                 } else {
4905                         $hash = $hash_base;
4906                 }
4907         }
4908         die_error(404, "No such tree") unless defined($hash);
4909
4910         my @entries = ();
4911         {
4912                 local $/ = "\0";
4913                 open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
4914                         or die_error(500, "Open git-ls-tree failed");
4915                 @entries = map { chomp; $_ } <$fd>;
4916                 close $fd
4917                         or die_error(404, "Reading tree failed");
4918         }
4919
4920         my $refs = git_get_references();
4921         my $ref = format_ref_marker($refs, $hash_base);
4922         git_header_html();
4923         my $basedir = '';
4924         my $have_blame = gitweb_check_feature('blame');
4925         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4926                 my @views_nav = ();
4927                 if (defined $file_name) {
4928                         push @views_nav,
4929                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4930                                         "history"),
4931                                 $cgi->a({-href => href(action=>"tree",
4932                                                        hash_base=>"HEAD", file_name=>$file_name)},
4933                                         "HEAD"),
4934                 }
4935                 my $snapshot_links = format_snapshot_links($hash);
4936                 if (defined $snapshot_links) {
4937                         # FIXME: Should be available when we have no hash base as well.
4938                         push @views_nav, $snapshot_links;
4939                 }
4940                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
4941                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
4942         } else {
4943                 undef $hash_base;
4944                 print "<div class=\"page_nav\">\n";
4945                 print "<br/><br/></div>\n";
4946                 print "<div class=\"title\">$hash</div>\n";
4947         }
4948         if (defined $file_name) {
4949                 $basedir = $file_name;
4950                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
4951                         $basedir .= '/';
4952                 }
4953                 git_print_page_path($file_name, 'tree', $hash_base);
4954         }
4955         print "<div class=\"page_body\">\n";
4956         print "<table class=\"tree\">\n";
4957         my $alternate = 1;
4958         # '..' (top directory) link if possible
4959         if (defined $hash_base &&
4960             defined $file_name && $file_name =~ m![^/]+$!) {
4961                 if ($alternate) {
4962                         print "<tr class=\"dark\">\n";
4963                 } else {
4964                         print "<tr class=\"light\">\n";
4965                 }
4966                 $alternate ^= 1;
4967
4968                 my $up = $file_name;
4969                 $up =~ s!/?[^/]+$!!;
4970                 undef $up unless $up;
4971                 # based on git_print_tree_entry
4972                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
4973                 print '<td class="list">';
4974                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
4975                                              file_name=>$up)},
4976                               "..");
4977                 print "</td>\n";
4978                 print "<td class=\"link\"></td>\n";
4979
4980                 print "</tr>\n";
4981         }
4982         foreach my $line (@entries) {
4983                 my %t = parse_ls_tree_line($line, -z => 1);
4984
4985                 if ($alternate) {
4986                         print "<tr class=\"dark\">\n";
4987                 } else {
4988                         print "<tr class=\"light\">\n";
4989                 }
4990                 $alternate ^= 1;
4991
4992                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
4993
4994                 print "</tr>\n";
4995         }
4996         print "</table>\n" .
4997               "</div>";
4998         git_footer_html();
4999 }
5000
5001 sub git_snapshot {
5002         my $format = $input_params{'snapshot_format'};
5003         if (!@snapshot_fmts) {
5004                 die_error(403, "Snapshots not allowed");
5005         }
5006         # default to first supported snapshot format
5007         $format ||= $snapshot_fmts[0];
5008         if ($format !~ m/^[a-z0-9]+$/) {
5009                 die_error(400, "Invalid snapshot format parameter");
5010         } elsif (!exists($known_snapshot_formats{$format})) {
5011                 die_error(400, "Unknown snapshot format");
5012         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5013                 die_error(403, "Unsupported snapshot format");
5014         }
5015
5016         if (!defined $hash) {
5017                 $hash = git_get_head_hash($project);
5018         }
5019
5020         my $name = $project;
5021         $name =~ s,([^/])/*\.git$,$1,;
5022         $name = basename($name);
5023         my $filename = to_utf8($name);
5024         $name =~ s/\047/\047\\\047\047/g;
5025         my $cmd;
5026         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
5027         $cmd = quote_command(
5028                 git_cmd(), 'archive',
5029                 "--format=$known_snapshot_formats{$format}{'format'}",
5030                 "--prefix=$name/", $hash);
5031         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5032                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5033         }
5034
5035         print $cgi->header(
5036                 -type => $known_snapshot_formats{$format}{'type'},
5037                 -content_disposition => 'inline; filename="' . "$filename" . '"',
5038                 -status => '200 OK');
5039
5040         open my $fd, "-|", $cmd
5041                 or die_error(500, "Execute git-archive failed");
5042         binmode STDOUT, ':raw';
5043         print <$fd>;
5044         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5045         close $fd;
5046 }
5047
5048 sub git_log {
5049         my $head = git_get_head_hash($project);
5050         if (!defined $hash) {
5051                 $hash = $head;
5052         }
5053         if (!defined $page) {
5054                 $page = 0;
5055         }
5056         my $refs = git_get_references();
5057
5058         my @commitlist = parse_commits($hash, 101, (100 * $page));
5059
5060         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
5061
5062         my ($patch_max) = gitweb_get_feature('patches');
5063         if ($patch_max) {
5064                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5065                         $paging_nav .= " &sdot; " .
5066                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5067                                         "patches");
5068                 }
5069         }
5070
5071         git_header_html();
5072         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5073
5074         if (!@commitlist) {
5075                 my %co = parse_commit($hash);
5076
5077                 git_print_header_div('summary', $project);
5078                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5079         }
5080         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5081         for (my $i = 0; $i <= $to; $i++) {
5082                 my %co = %{$commitlist[$i]};
5083                 next if !%co;
5084                 my $commit = $co{'id'};
5085                 my $ref = format_ref_marker($refs, $commit);
5086                 my %ad = parse_date($co{'author_epoch'});
5087                 git_print_header_div('commit',
5088                                "<span class=\"age\">$co{'age_string'}</span>" .
5089                                esc_html($co{'title'}) . $ref,
5090                                $commit);
5091                 print "<div class=\"title_text\">\n" .
5092                       "<div class=\"log_link\">\n" .
5093                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5094                       " | " .
5095                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5096                       " | " .
5097                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5098                       "<br/>\n" .
5099                       "</div>\n" .
5100                       "<i>" . esc_html($co{'author_name'}) .  " [$ad{'rfc2822'}]</i><br/>\n" .
5101                       "</div>\n";
5102
5103                 print "<div class=\"log_body\">\n";
5104                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5105                 print "</div>\n";
5106         }
5107         if ($#commitlist >= 100) {
5108                 print "<div class=\"page_nav\">\n";
5109                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5110                                -accesskey => "n", -title => "Alt-n"}, "next");
5111                 print "</div>\n";
5112         }
5113         git_footer_html();
5114 }
5115
5116 sub git_commit {
5117         $hash ||= $hash_base || "HEAD";
5118         my %co = parse_commit($hash)
5119             or die_error(404, "Unknown commit object");
5120         my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5121         my %cd = parse_date($co{'committer_epoch'}, $co{'committer_tz'});
5122
5123         my $parent  = $co{'parent'};
5124         my $parents = $co{'parents'}; # listref
5125
5126         # we need to prepare $formats_nav before any parameter munging
5127         my $formats_nav;
5128         if (!defined $parent) {
5129                 # --root commitdiff
5130                 $formats_nav .= '(initial)';
5131         } elsif (@$parents == 1) {
5132                 # single parent commit
5133                 $formats_nav .=
5134                         '(parent: ' .
5135                         $cgi->a({-href => href(action=>"commit",
5136                                                hash=>$parent)},
5137                                 esc_html(substr($parent, 0, 7))) .
5138                         ')';
5139         } else {
5140                 # merge commit
5141                 $formats_nav .=
5142                         '(merge: ' .
5143                         join(' ', map {
5144                                 $cgi->a({-href => href(action=>"commit",
5145                                                        hash=>$_)},
5146                                         esc_html(substr($_, 0, 7)));
5147                         } @$parents ) .
5148                         ')';
5149         }
5150         if (gitweb_check_feature('patches')) {
5151                 $formats_nav .= " | " .
5152                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5153                                 "patch");
5154         }
5155
5156         if (!defined $parent) {
5157                 $parent = "--root";
5158         }
5159         my @difftree;
5160         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5161                 @diff_opts,
5162                 (@$parents <= 1 ? $parent : '-c'),
5163                 $hash, "--"
5164                 or die_error(500, "Open git-diff-tree failed");
5165         @difftree = map { chomp; $_ } <$fd>;
5166         close $fd or die_error(404, "Reading git-diff-tree failed");
5167
5168         # non-textual hash id's can be cached
5169         my $expires;
5170         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5171                 $expires = "+1d";
5172         }
5173         my $refs = git_get_references();
5174         my $ref = format_ref_marker($refs, $co{'id'});
5175
5176         git_header_html(undef, $expires);
5177         git_print_page_nav('commit', '',
5178                            $hash, $co{'tree'}, $hash,
5179                            $formats_nav);
5180
5181         if (defined $co{'parent'}) {
5182                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5183         } else {
5184                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5185         }
5186         print "<div class=\"title_text\">\n" .
5187               "<table class=\"object_header\">\n";
5188         print "<tr><td>author</td><td>" . esc_html($co{'author'}) . "</td></tr>\n".
5189               "<tr>" .
5190               "<td></td><td> $ad{'rfc2822'}";
5191         if ($ad{'hour_local'} < 6) {
5192                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
5193                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5194         } else {
5195                 printf(" (%02d:%02d %s)",
5196                        $ad{'hour_local'}, $ad{'minute_local'}, $ad{'tz_local'});
5197         }
5198         print "</td>" .
5199               "</tr>\n";
5200         print "<tr><td>committer</td><td>" . esc_html($co{'committer'}) . "</td></tr>\n";
5201         print "<tr><td></td><td> $cd{'rfc2822'}" .
5202               sprintf(" (%02d:%02d %s)", $cd{'hour_local'}, $cd{'minute_local'}, $cd{'tz_local'}) .
5203               "</td></tr>\n";
5204         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5205         print "<tr>" .
5206               "<td>tree</td>" .
5207               "<td class=\"sha1\">" .
5208               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5209                        class => "list"}, $co{'tree'}) .
5210               "</td>" .
5211               "<td class=\"link\">" .
5212               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5213                       "tree");
5214         my $snapshot_links = format_snapshot_links($hash);
5215         if (defined $snapshot_links) {
5216                 print " | " . $snapshot_links;
5217         }
5218         print "</td>" .
5219               "</tr>\n";
5220
5221         foreach my $par (@$parents) {
5222                 print "<tr>" .
5223                       "<td>parent</td>" .
5224                       "<td class=\"sha1\">" .
5225                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5226                                class => "list"}, $par) .
5227                       "</td>" .
5228                       "<td class=\"link\">" .
5229                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5230                       " | " .
5231                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5232                       "</td>" .
5233                       "</tr>\n";
5234         }
5235         print "</table>".
5236               "</div>\n";
5237
5238         print "<div class=\"page_body\">\n";
5239         git_print_log($co{'comment'});
5240         print "</div>\n";
5241
5242         git_difftree_body(\@difftree, $hash, @$parents);
5243
5244         git_footer_html();
5245 }
5246
5247 sub git_object {
5248         # object is defined by:
5249         # - hash or hash_base alone
5250         # - hash_base and file_name
5251         my $type;
5252
5253         # - hash or hash_base alone
5254         if ($hash || ($hash_base && !defined $file_name)) {
5255                 my $object_id = $hash || $hash_base;
5256
5257                 open my $fd, "-|", quote_command(
5258                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5259                         or die_error(404, "Object does not exist");
5260                 $type = <$fd>;
5261                 chomp $type;
5262                 close $fd
5263                         or die_error(404, "Object does not exist");
5264
5265         # - hash_base and file_name
5266         } elsif ($hash_base && defined $file_name) {
5267                 $file_name =~ s,/+$,,;
5268
5269                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5270                         or die_error(404, "Base object does not exist");
5271
5272                 # here errors should not hapen
5273                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5274                         or die_error(500, "Open git-ls-tree failed");
5275                 my $line = <$fd>;
5276                 close $fd;
5277
5278                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5279                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5280                         die_error(404, "File or directory for given base does not exist");
5281                 }
5282                 $type = $2;
5283                 $hash = $3;
5284         } else {
5285                 die_error(400, "Not enough information to find object");
5286         }
5287
5288         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5289                                           hash=>$hash, hash_base=>$hash_base,
5290                                           file_name=>$file_name),
5291                              -status => '302 Found');
5292 }
5293
5294 sub git_blobdiff {
5295         my $format = shift || 'html';
5296
5297         my $fd;
5298         my @difftree;
5299         my %diffinfo;
5300         my $expires;
5301
5302         # preparing $fd and %diffinfo for git_patchset_body
5303         # new style URI
5304         if (defined $hash_base && defined $hash_parent_base) {
5305                 if (defined $file_name) {
5306                         # read raw output
5307                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5308                                 $hash_parent_base, $hash_base,
5309                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5310                                 or die_error(500, "Open git-diff-tree failed");
5311                         @difftree = map { chomp; $_ } <$fd>;
5312                         close $fd
5313                                 or die_error(404, "Reading git-diff-tree failed");
5314                         @difftree
5315                                 or die_error(404, "Blob diff not found");
5316
5317                 } elsif (defined $hash &&
5318                          $hash =~ /[0-9a-fA-F]{40}/) {
5319                         # try to find filename from $hash
5320
5321                         # read filtered raw output
5322                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5323                                 $hash_parent_base, $hash_base, "--"
5324                                 or die_error(500, "Open git-diff-tree failed");
5325                         @difftree =
5326                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5327                                 # $hash == to_id
5328                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5329                                 map { chomp; $_ } <$fd>;
5330                         close $fd
5331                                 or die_error(404, "Reading git-diff-tree failed");
5332                         @difftree
5333                                 or die_error(404, "Blob diff not found");
5334
5335                 } else {
5336                         die_error(400, "Missing one of the blob diff parameters");
5337                 }
5338
5339                 if (@difftree > 1) {
5340                         die_error(400, "Ambiguous blob diff specification");
5341                 }
5342
5343                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5344                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5345                 $file_name   ||= $diffinfo{'to_file'};
5346
5347                 $hash_parent ||= $diffinfo{'from_id'};
5348                 $hash        ||= $diffinfo{'to_id'};
5349
5350                 # non-textual hash id's can be cached
5351                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5352                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5353                         $expires = '+1d';
5354                 }
5355
5356                 # open patch output
5357                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5358                         '-p', ($format eq 'html' ? "--full-index" : ()),
5359                         $hash_parent_base, $hash_base,
5360                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5361                         or die_error(500, "Open git-diff-tree failed");
5362         }
5363
5364         # old/legacy style URI -- not generated anymore since 1.4.3.
5365         if (!%diffinfo) {
5366                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5367         }
5368
5369         # header
5370         if ($format eq 'html') {
5371                 my $formats_nav =
5372                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5373                                 "raw");
5374                 git_header_html(undef, $expires);
5375                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5376                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5377                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5378                 } else {
5379                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5380                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5381                 }
5382                 if (defined $file_name) {
5383                         git_print_page_path($file_name, "blob", $hash_base);
5384                 } else {
5385                         print "<div class=\"page_path\"></div>\n";
5386                 }
5387
5388         } elsif ($format eq 'plain') {
5389                 print $cgi->header(
5390                         -type => 'text/plain',
5391                         -charset => 'utf-8',
5392                         -expires => $expires,
5393                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5394
5395                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5396
5397         } else {
5398                 die_error(400, "Unknown blobdiff format");
5399         }
5400
5401         # patch
5402         if ($format eq 'html') {
5403                 print "<div class=\"page_body\">\n";
5404
5405                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5406                 close $fd;
5407
5408                 print "</div>\n"; # class="page_body"
5409                 git_footer_html();
5410
5411         } else {
5412                 while (my $line = <$fd>) {
5413                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5414                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5415
5416                         print $line;
5417
5418                         last if $line =~ m!^\+\+\+!;
5419                 }
5420                 local $/ = undef;
5421                 print <$fd>;
5422                 close $fd;
5423         }
5424 }
5425
5426 sub git_blobdiff_plain {
5427         git_blobdiff('plain');
5428 }
5429
5430 sub git_commitdiff {
5431         my %params = @_;
5432         my $format = $params{-format} || 'html';
5433
5434         my ($patch_max) = gitweb_get_feature('patches');
5435         if ($format eq 'patch') {
5436                 die_error(403, "Patch view not allowed") unless $patch_max;
5437         }
5438
5439         $hash ||= $hash_base || "HEAD";
5440         my %co = parse_commit($hash)
5441             or die_error(404, "Unknown commit object");
5442
5443         # choose format for commitdiff for merge
5444         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5445                 $hash_parent = '--cc';
5446         }
5447         # we need to prepare $formats_nav before almost any parameter munging
5448         my $formats_nav;
5449         if ($format eq 'html') {
5450                 $formats_nav =
5451                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5452                                 "raw");
5453                 if ($patch_max) {
5454                         $formats_nav .= " | " .
5455                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5456                                         "patch");
5457                 }
5458
5459                 if (defined $hash_parent &&
5460                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5461                         # commitdiff with two commits given
5462                         my $hash_parent_short = $hash_parent;
5463                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5464                                 $hash_parent_short = substr($hash_parent, 0, 7);
5465                         }
5466                         $formats_nav .=
5467                                 ' (from';
5468                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5469                                 if ($co{'parents'}[$i] eq $hash_parent) {
5470                                         $formats_nav .= ' parent ' . ($i+1);
5471                                         last;
5472                                 }
5473                         }
5474                         $formats_nav .= ': ' .
5475                                 $cgi->a({-href => href(action=>"commitdiff",
5476                                                        hash=>$hash_parent)},
5477                                         esc_html($hash_parent_short)) .
5478                                 ')';
5479                 } elsif (!$co{'parent'}) {
5480                         # --root commitdiff
5481                         $formats_nav .= ' (initial)';
5482                 } elsif (scalar @{$co{'parents'}} == 1) {
5483                         # single parent commit
5484                         $formats_nav .=
5485                                 ' (parent: ' .
5486                                 $cgi->a({-href => href(action=>"commitdiff",
5487                                                        hash=>$co{'parent'})},
5488                                         esc_html(substr($co{'parent'}, 0, 7))) .
5489                                 ')';
5490                 } else {
5491                         # merge commit
5492                         if ($hash_parent eq '--cc') {
5493                                 $formats_nav .= ' | ' .
5494                                         $cgi->a({-href => href(action=>"commitdiff",
5495                                                                hash=>$hash, hash_parent=>'-c')},
5496                                                 'combined');
5497                         } else { # $hash_parent eq '-c'
5498                                 $formats_nav .= ' | ' .
5499                                         $cgi->a({-href => href(action=>"commitdiff",
5500                                                                hash=>$hash, hash_parent=>'--cc')},
5501                                                 'compact');
5502                         }
5503                         $formats_nav .=
5504                                 ' (merge: ' .
5505                                 join(' ', map {
5506                                         $cgi->a({-href => href(action=>"commitdiff",
5507                                                                hash=>$_)},
5508                                                 esc_html(substr($_, 0, 7)));
5509                                 } @{$co{'parents'}} ) .
5510                                 ')';
5511                 }
5512         }
5513
5514         my $hash_parent_param = $hash_parent;
5515         if (!defined $hash_parent_param) {
5516                 # --cc for multiple parents, --root for parentless
5517                 $hash_parent_param =
5518                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5519         }
5520
5521         # read commitdiff
5522         my $fd;
5523         my @difftree;
5524         if ($format eq 'html') {
5525                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5526                         "--no-commit-id", "--patch-with-raw", "--full-index",
5527                         $hash_parent_param, $hash, "--"
5528                         or die_error(500, "Open git-diff-tree failed");
5529
5530                 while (my $line = <$fd>) {
5531                         chomp $line;
5532                         # empty line ends raw part of diff-tree output
5533                         last unless $line;
5534                         push @difftree, scalar parse_difftree_raw_line($line);
5535                 }
5536
5537         } elsif ($format eq 'plain') {
5538                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5539                         '-p', $hash_parent_param, $hash, "--"
5540                         or die_error(500, "Open git-diff-tree failed");
5541         } elsif ($format eq 'patch') {
5542                 # For commit ranges, we limit the output to the number of
5543                 # patches specified in the 'patches' feature.
5544                 # For single commits, we limit the output to a single patch,
5545                 # diverging from the git-format-patch default.
5546                 my @commit_spec = ();
5547                 if ($hash_parent) {
5548                         if ($patch_max > 0) {
5549                                 push @commit_spec, "-$patch_max";
5550                         }
5551                         push @commit_spec, '-n', "$hash_parent..$hash";
5552                 } else {
5553                         if ($params{-single}) {
5554                                 push @commit_spec, '-1';
5555                         } else {
5556                                 if ($patch_max > 0) {
5557                                         push @commit_spec, "-$patch_max";
5558                                 }
5559                                 push @commit_spec, "-n";
5560                         }
5561                         push @commit_spec, '--root', $hash;
5562                 }
5563                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5564                         '--stdout', @commit_spec
5565                         or die_error(500, "Open git-format-patch failed");
5566         } else {
5567                 die_error(400, "Unknown commitdiff format");
5568         }
5569
5570         # non-textual hash id's can be cached
5571         my $expires;
5572         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5573                 $expires = "+1d";
5574         }
5575
5576         # write commit message
5577         if ($format eq 'html') {
5578                 my $refs = git_get_references();
5579                 my $ref = format_ref_marker($refs, $co{'id'});
5580
5581                 git_header_html(undef, $expires);
5582                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5583                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5584                 git_print_authorship(\%co);
5585                 print "<div class=\"page_body\">\n";
5586                 if (@{$co{'comment'}} > 1) {
5587                         print "<div class=\"log\">\n";
5588                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5589                         print "</div>\n"; # class="log"
5590                 }
5591
5592         } elsif ($format eq 'plain') {
5593                 my $refs = git_get_references("tags");
5594                 my $tagname = git_get_rev_name_tags($hash);
5595                 my $filename = basename($project) . "-$hash.patch";
5596
5597                 print $cgi->header(
5598                         -type => 'text/plain',
5599                         -charset => 'utf-8',
5600                         -expires => $expires,
5601                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5602                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5603                 print "From: " . to_utf8($co{'author'}) . "\n";
5604                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5605                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5606
5607                 print "X-Git-Tag: $tagname\n" if $tagname;
5608                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5609
5610                 foreach my $line (@{$co{'comment'}}) {
5611                         print to_utf8($line) . "\n";
5612                 }
5613                 print "---\n\n";
5614         } elsif ($format eq 'patch') {
5615                 my $filename = basename($project) . "-$hash.patch";
5616
5617                 print $cgi->header(
5618                         -type => 'text/plain',
5619                         -charset => 'utf-8',
5620                         -expires => $expires,
5621                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5622         }
5623
5624         # write patch
5625         if ($format eq 'html') {
5626                 my $use_parents = !defined $hash_parent ||
5627                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5628                 git_difftree_body(\@difftree, $hash,
5629                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5630                 print "<br/>\n";
5631
5632                 git_patchset_body($fd, \@difftree, $hash,
5633                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5634                 close $fd;
5635                 print "</div>\n"; # class="page_body"
5636                 git_footer_html();
5637
5638         } elsif ($format eq 'plain') {
5639                 local $/ = undef;
5640                 print <$fd>;
5641                 close $fd
5642                         or print "Reading git-diff-tree failed\n";
5643         } elsif ($format eq 'patch') {
5644                 local $/ = undef;
5645                 print <$fd>;
5646                 close $fd
5647                         or print "Reading git-format-patch failed\n";
5648         }
5649 }
5650
5651 sub git_commitdiff_plain {
5652         git_commitdiff(-format => 'plain');
5653 }
5654
5655 # format-patch-style patches
5656 sub git_patch {
5657         git_commitdiff(-format => 'patch', -single=> 1);
5658 }
5659
5660 sub git_patches {
5661         git_commitdiff(-format => 'patch');
5662 }
5663
5664 sub git_history {
5665         if (!defined $hash_base) {
5666                 $hash_base = git_get_head_hash($project);
5667         }
5668         if (!defined $page) {
5669                 $page = 0;
5670         }
5671         my $ftype;
5672         my %co = parse_commit($hash_base)
5673             or die_error(404, "Unknown commit object");
5674
5675         my $refs = git_get_references();
5676         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5677
5678         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5679                                        $file_name, "--full-history")
5680             or die_error(404, "No such file or directory on given branch");
5681
5682         if (!defined $hash && defined $file_name) {
5683                 # some commits could have deleted file in question,
5684                 # and not have it in tree, but one of them has to have it
5685                 for (my $i = 0; $i <= @commitlist; $i++) {
5686                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5687                         last if defined $hash;
5688                 }
5689         }
5690         if (defined $hash) {
5691                 $ftype = git_get_type($hash);
5692         }
5693         if (!defined $ftype) {
5694                 die_error(500, "Unknown type of object");
5695         }
5696
5697         my $paging_nav = '';
5698         if ($page > 0) {
5699                 $paging_nav .=
5700                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5701                                                file_name=>$file_name)},
5702                                 "first");
5703                 $paging_nav .= " &sdot; " .
5704                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5705                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5706         } else {
5707                 $paging_nav .= "first";
5708                 $paging_nav .= " &sdot; prev";
5709         }
5710         my $next_link = '';
5711         if ($#commitlist >= 100) {
5712                 $next_link =
5713                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5714                                  -accesskey => "n", -title => "Alt-n"}, "next");
5715                 $paging_nav .= " &sdot; $next_link";
5716         } else {
5717                 $paging_nav .= " &sdot; next";
5718         }
5719
5720         git_header_html();
5721         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5722         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5723         git_print_page_path($file_name, $ftype, $hash_base);
5724
5725         git_history_body(\@commitlist, 0, 99,
5726                          $refs, $hash_base, $ftype, $next_link);
5727
5728         git_footer_html();
5729 }
5730
5731 sub git_search {
5732         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5733         if (!defined $searchtext) {
5734                 die_error(400, "Text field is empty");
5735         }
5736         if (!defined $hash) {
5737                 $hash = git_get_head_hash($project);
5738         }
5739         my %co = parse_commit($hash);
5740         if (!%co) {
5741                 die_error(404, "Unknown commit object");
5742         }
5743         if (!defined $page) {
5744                 $page = 0;
5745         }
5746
5747         $searchtype ||= 'commit';
5748         if ($searchtype eq 'pickaxe') {
5749                 # pickaxe may take all resources of your box and run for several minutes
5750                 # with every query - so decide by yourself how public you make this feature
5751                 gitweb_check_feature('pickaxe')
5752                     or die_error(403, "Pickaxe is disabled");
5753         }
5754         if ($searchtype eq 'grep') {
5755                 gitweb_check_feature('grep')
5756                     or die_error(403, "Grep is disabled");
5757         }
5758
5759         git_header_html();
5760
5761         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5762                 my $greptype;
5763                 if ($searchtype eq 'commit') {
5764                         $greptype = "--grep=";
5765                 } elsif ($searchtype eq 'author') {
5766                         $greptype = "--author=";
5767                 } elsif ($searchtype eq 'committer') {
5768                         $greptype = "--committer=";
5769                 }
5770                 $greptype .= $searchtext;
5771                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5772                                                $greptype, '--regexp-ignore-case',
5773                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5774
5775                 my $paging_nav = '';
5776                 if ($page > 0) {
5777                         $paging_nav .=
5778                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5779                                                        searchtext=>$searchtext,
5780                                                        searchtype=>$searchtype)},
5781                                         "first");
5782                         $paging_nav .= " &sdot; " .
5783                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5784                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5785                 } else {
5786                         $paging_nav .= "first";
5787                         $paging_nav .= " &sdot; prev";
5788                 }
5789                 my $next_link = '';
5790                 if ($#commitlist >= 100) {
5791                         $next_link =
5792                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5793                                          -accesskey => "n", -title => "Alt-n"}, "next");
5794                         $paging_nav .= " &sdot; $next_link";
5795                 } else {
5796                         $paging_nav .= " &sdot; next";
5797                 }
5798
5799                 if ($#commitlist >= 100) {
5800                 }
5801
5802                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5803                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5804                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5805         }
5806
5807         if ($searchtype eq 'pickaxe') {
5808                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5809                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5810
5811                 print "<table class=\"pickaxe search\">\n";
5812                 my $alternate = 1;
5813                 local $/ = "\n";
5814                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5815                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5816                         ($search_use_regexp ? '--pickaxe-regex' : ());
5817                 undef %co;
5818                 my @files;
5819                 while (my $line = <$fd>) {
5820                         chomp $line;
5821                         next unless $line;
5822
5823                         my %set = parse_difftree_raw_line($line);
5824                         if (defined $set{'commit'}) {
5825                                 # finish previous commit
5826                                 if (%co) {
5827                                         print "</td>\n" .
5828                                               "<td class=\"link\">" .
5829                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5830                                               " | " .
5831                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5832                                         print "</td>\n" .
5833                                               "</tr>\n";
5834                                 }
5835
5836                                 if ($alternate) {
5837                                         print "<tr class=\"dark\">\n";
5838                                 } else {
5839                                         print "<tr class=\"light\">\n";
5840                                 }
5841                                 $alternate ^= 1;
5842                                 %co = parse_commit($set{'commit'});
5843                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5844                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5845                                       "<td><i>$author</i></td>\n" .
5846                                       "<td>" .
5847                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5848                                               -class => "list subject"},
5849                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5850                         } elsif (defined $set{'to_id'}) {
5851                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5852
5853                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5854                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5855                                               -class => "list"},
5856                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5857                                       "<br/>\n";
5858                         }
5859                 }
5860                 close $fd;
5861
5862                 # finish last commit (warning: repetition!)
5863                 if (%co) {
5864                         print "</td>\n" .
5865                               "<td class=\"link\">" .
5866                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5867                               " | " .
5868                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5869                         print "</td>\n" .
5870                               "</tr>\n";
5871                 }
5872
5873                 print "</table>\n";
5874         }
5875
5876         if ($searchtype eq 'grep') {
5877                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5878                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5879
5880                 print "<table class=\"grep_search\">\n";
5881                 my $alternate = 1;
5882                 my $matches = 0;
5883                 local $/ = "\n";
5884                 open my $fd, "-|", git_cmd(), 'grep', '-n',
5885                         $search_use_regexp ? ('-E', '-i') : '-F',
5886                         $searchtext, $co{'tree'};
5887                 my $lastfile = '';
5888                 while (my $line = <$fd>) {
5889                         chomp $line;
5890                         my ($file, $lno, $ltext, $binary);
5891                         last if ($matches++ > 1000);
5892                         if ($line =~ /^Binary file (.+) matches$/) {
5893                                 $file = $1;
5894                                 $binary = 1;
5895                         } else {
5896                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
5897                         }
5898                         if ($file ne $lastfile) {
5899                                 $lastfile and print "</td></tr>\n";
5900                                 if ($alternate++) {
5901                                         print "<tr class=\"dark\">\n";
5902                                 } else {
5903                                         print "<tr class=\"light\">\n";
5904                                 }
5905                                 print "<td class=\"list\">".
5906                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5907                                                                file_name=>"$file"),
5908                                                 -class => "list"}, esc_path($file));
5909                                 print "</td><td>\n";
5910                                 $lastfile = $file;
5911                         }
5912                         if ($binary) {
5913                                 print "<div class=\"binary\">Binary file</div>\n";
5914                         } else {
5915                                 $ltext = untabify($ltext);
5916                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
5917                                         $ltext = esc_html($1, -nbsp=>1);
5918                                         $ltext .= '<span class="match">';
5919                                         $ltext .= esc_html($2, -nbsp=>1);
5920                                         $ltext .= '</span>';
5921                                         $ltext .= esc_html($3, -nbsp=>1);
5922                                 } else {
5923                                         $ltext = esc_html($ltext, -nbsp=>1);
5924                                 }
5925                                 print "<div class=\"pre\">" .
5926                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
5927                                                                file_name=>"$file").'#l'.$lno,
5928                                                 -class => "linenr"}, sprintf('%4i', $lno))
5929                                         . ' ' .  $ltext . "</div>\n";
5930                         }
5931                 }
5932                 if ($lastfile) {
5933                         print "</td></tr>\n";
5934                         if ($matches > 1000) {
5935                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
5936                         }
5937                 } else {
5938                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
5939                 }
5940                 close $fd;
5941
5942                 print "</table>\n";
5943         }
5944         git_footer_html();
5945 }
5946
5947 sub git_search_help {
5948         git_header_html();
5949         git_print_page_nav('','', $hash,$hash,$hash);
5950         print <<EOT;
5951 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
5952 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
5953 the pattern entered is recognized as the POSIX extended
5954 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
5955 insensitive).</p>
5956 <dl>
5957 <dt><b>commit</b></dt>
5958 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
5959 EOT
5960         my $have_grep = gitweb_check_feature('grep');
5961         if ($have_grep) {
5962                 print <<EOT;
5963 <dt><b>grep</b></dt>
5964 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
5965     a different one) are searched for the given pattern. On large trees, this search can take
5966 a while and put some strain on the server, so please use it with some consideration. Note that
5967 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
5968 case-sensitive.</dd>
5969 EOT
5970         }
5971         print <<EOT;
5972 <dt><b>author</b></dt>
5973 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
5974 <dt><b>committer</b></dt>
5975 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
5976 EOT
5977         my $have_pickaxe = gitweb_check_feature('pickaxe');
5978         if ($have_pickaxe) {
5979                 print <<EOT;
5980 <dt><b>pickaxe</b></dt>
5981 <dd>All commits that caused the string to appear or disappear from any file (changes that
5982 added, removed or "modified" the string) will be listed. This search can take a while and
5983 takes a lot of strain on the server, so please use it wisely. Note that since you may be
5984 interested even in changes just changing the case as well, this search is case sensitive.</dd>
5985 EOT
5986         }
5987         print "</dl>\n";
5988         git_footer_html();
5989 }
5990
5991 sub git_shortlog {
5992         my $head = git_get_head_hash($project);
5993         if (!defined $hash) {
5994                 $hash = $head;
5995         }
5996         if (!defined $page) {
5997                 $page = 0;
5998         }
5999         my $refs = git_get_references();
6000
6001         my $commit_hash = $hash;
6002         if (defined $hash_parent) {
6003                 $commit_hash = "$hash_parent..$hash";
6004         }
6005         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
6006
6007         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
6008         my $next_link = '';
6009         if ($#commitlist >= 100) {
6010                 $next_link =
6011                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6012                                  -accesskey => "n", -title => "Alt-n"}, "next");
6013         }
6014         my $patch_max = gitweb_check_feature('patches');
6015         if ($patch_max) {
6016                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6017                         $paging_nav .= " &sdot; " .
6018                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6019                                         "patches");
6020                 }
6021         }
6022
6023         git_header_html();
6024         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
6025         git_print_header_div('summary', $project);
6026
6027         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
6028
6029         git_footer_html();
6030 }
6031
6032 ## ......................................................................
6033 ## feeds (RSS, Atom; OPML)
6034
6035 sub git_feed {
6036         my $format = shift || 'atom';
6037         my $have_blame = gitweb_check_feature('blame');
6038
6039         # Atom: http://www.atomenabled.org/developers/syndication/
6040         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6041         if ($format ne 'rss' && $format ne 'atom') {
6042                 die_error(400, "Unknown web feed format");
6043         }
6044
6045         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6046         my $head = $hash || 'HEAD';
6047         my @commitlist = parse_commits($head, 150, 0, $file_name);
6048
6049         my %latest_commit;
6050         my %latest_date;
6051         my $content_type = "application/$format+xml";
6052         if (defined $cgi->http('HTTP_ACCEPT') &&
6053                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6054                 # browser (feed reader) prefers text/xml
6055                 $content_type = 'text/xml';
6056         }
6057         if (defined($commitlist[0])) {
6058                 %latest_commit = %{$commitlist[0]};
6059                 my $latest_epoch = $latest_commit{'committer_epoch'};
6060                 %latest_date   = parse_date($latest_epoch);
6061                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6062                 if (defined $if_modified) {
6063                         my $since;
6064                         if (eval { require HTTP::Date; 1; }) {
6065                                 $since = HTTP::Date::str2time($if_modified);
6066                         } elsif (eval { require Time::ParseDate; 1; }) {
6067                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6068                         }
6069                         if (defined $since && $latest_epoch <= $since) {
6070                                 print $cgi->header(
6071                                         -type => $content_type,
6072                                         -charset => 'utf-8',
6073                                         -last_modified => $latest_date{'rfc2822'},
6074                                         -status => '304 Not Modified');
6075                                 return;
6076                         }
6077                 }
6078                 print $cgi->header(
6079                         -type => $content_type,
6080                         -charset => 'utf-8',
6081                         -last_modified => $latest_date{'rfc2822'});
6082         } else {
6083                 print $cgi->header(
6084                         -type => $content_type,
6085                         -charset => 'utf-8');
6086         }
6087
6088         # Optimization: skip generating the body if client asks only
6089         # for Last-Modified date.
6090         return if ($cgi->request_method() eq 'HEAD');
6091
6092         # header variables
6093         my $title = "$site_name - $project/$action";
6094         my $feed_type = 'log';
6095         if (defined $hash) {
6096                 $title .= " - '$hash'";
6097                 $feed_type = 'branch log';
6098                 if (defined $file_name) {
6099                         $title .= " :: $file_name";
6100                         $feed_type = 'history';
6101                 }
6102         } elsif (defined $file_name) {
6103                 $title .= " - $file_name";
6104                 $feed_type = 'history';
6105         }
6106         $title .= " $feed_type";
6107         my $descr = git_get_project_description($project);
6108         if (defined $descr) {
6109                 $descr = esc_html($descr);
6110         } else {
6111                 $descr = "$project " .
6112                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6113                          " feed";
6114         }
6115         my $owner = git_get_project_owner($project);
6116         $owner = esc_html($owner);
6117
6118         #header
6119         my $alt_url;
6120         if (defined $file_name) {
6121                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6122         } elsif (defined $hash) {
6123                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6124         } else {
6125                 $alt_url = href(-full=>1, action=>"summary");
6126         }
6127         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6128         if ($format eq 'rss') {
6129                 print <<XML;
6130 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6131 <channel>
6132 XML
6133                 print "<title>$title</title>\n" .
6134                       "<link>$alt_url</link>\n" .
6135                       "<description>$descr</description>\n" .
6136                       "<language>en</language>\n" .
6137                       # project owner is responsible for 'editorial' content
6138                       "<managingEditor>$owner</managingEditor>\n";
6139                 if (defined $logo || defined $favicon) {
6140                         # prefer the logo to the favicon, since RSS
6141                         # doesn't allow both
6142                         my $img = esc_url($logo || $favicon);
6143                         print "<image>\n" .
6144                               "<url>$img</url>\n" .
6145                               "<title>$title</title>\n" .
6146                               "<link>$alt_url</link>\n" .
6147                               "</image>\n";
6148                 }
6149                 if (%latest_date) {
6150                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6151                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6152                 }
6153                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6154         } elsif ($format eq 'atom') {
6155                 print <<XML;
6156 <feed xmlns="http://www.w3.org/2005/Atom">
6157 XML
6158                 print "<title>$title</title>\n" .
6159                       "<subtitle>$descr</subtitle>\n" .
6160                       '<link rel="alternate" type="text/html" href="' .
6161                       $alt_url . '" />' . "\n" .
6162                       '<link rel="self" type="' . $content_type . '" href="' .
6163                       $cgi->self_url() . '" />' . "\n" .
6164                       "<id>" . href(-full=>1) . "</id>\n" .
6165                       # use project owner for feed author
6166                       "<author><name>$owner</name></author>\n";
6167                 if (defined $favicon) {
6168                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6169                 }
6170                 if (defined $logo_url) {
6171                         # not twice as wide as tall: 72 x 27 pixels
6172                         print "<logo>" . esc_url($logo) . "</logo>\n";
6173                 }
6174                 if (! %latest_date) {
6175                         # dummy date to keep the feed valid until commits trickle in:
6176                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6177                 } else {
6178                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6179                 }
6180                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6181         }
6182
6183         # contents
6184         for (my $i = 0; $i <= $#commitlist; $i++) {
6185                 my %co = %{$commitlist[$i]};
6186                 my $commit = $co{'id'};
6187                 # we read 150, we always show 30 and the ones more recent than 48 hours
6188                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6189                         last;
6190                 }
6191                 my %cd = parse_date($co{'author_epoch'});
6192
6193                 # get list of changed files
6194                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6195                         $co{'parent'} || "--root",
6196                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6197                         or next;
6198                 my @difftree = map { chomp; $_ } <$fd>;
6199                 close $fd
6200                         or next;
6201
6202                 # print element (entry, item)
6203                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6204                 if ($format eq 'rss') {
6205                         print "<item>\n" .
6206                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6207                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6208                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6209                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6210                               "<link>$co_url</link>\n" .
6211                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6212                               "<content:encoded>" .
6213                               "<![CDATA[\n";
6214                 } elsif ($format eq 'atom') {
6215                         print "<entry>\n" .
6216                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6217                               "<updated>$cd{'iso-8601'}</updated>\n" .
6218                               "<author>\n" .
6219                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6220                         if ($co{'author_email'}) {
6221                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6222                         }
6223                         print "</author>\n" .
6224                               # use committer for contributor
6225                               "<contributor>\n" .
6226                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6227                         if ($co{'committer_email'}) {
6228                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6229                         }
6230                         print "</contributor>\n" .
6231                               "<published>$cd{'iso-8601'}</published>\n" .
6232                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6233                               "<id>$co_url</id>\n" .
6234                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6235                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6236                 }
6237                 my $comment = $co{'comment'};
6238                 print "<pre>\n";
6239                 foreach my $line (@$comment) {
6240                         $line = esc_html($line);
6241                         print "$line\n";
6242                 }
6243                 print "</pre><ul>\n";
6244                 foreach my $difftree_line (@difftree) {
6245                         my %difftree = parse_difftree_raw_line($difftree_line);
6246                         next if !$difftree{'from_id'};
6247
6248                         my $file = $difftree{'file'} || $difftree{'to_file'};
6249
6250                         print "<li>" .
6251                               "[" .
6252                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6253                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6254                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6255                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6256                                       -title => "diff"}, 'D');
6257                         if ($have_blame) {
6258                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6259                                                              file_name=>$file, hash_base=>$commit),
6260                                               -title => "blame"}, 'B');
6261                         }
6262                         # if this is not a feed of a file history
6263                         if (!defined $file_name || $file_name ne $file) {
6264                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6265                                                              file_name=>$file, hash=>$commit),
6266                                               -title => "history"}, 'H');
6267                         }
6268                         $file = esc_path($file);
6269                         print "] ".
6270                               "$file</li>\n";
6271                 }
6272                 if ($format eq 'rss') {
6273                         print "</ul>]]>\n" .
6274                               "</content:encoded>\n" .
6275                               "</item>\n";
6276                 } elsif ($format eq 'atom') {
6277                         print "</ul>\n</div>\n" .
6278                               "</content>\n" .
6279                               "</entry>\n";
6280                 }
6281         }
6282
6283         # end of feed
6284         if ($format eq 'rss') {
6285                 print "</channel>\n</rss>\n";
6286         } elsif ($format eq 'atom') {
6287                 print "</feed>\n";
6288         }
6289 }
6290
6291 sub git_rss {
6292         git_feed('rss');
6293 }
6294
6295 sub git_atom {
6296         git_feed('atom');
6297 }
6298
6299 sub git_opml {
6300         my @list = git_get_projects_list();
6301
6302         print $cgi->header(
6303                 -type => 'text/xml',
6304                 -charset => 'utf-8',
6305                 -content_disposition => 'inline; filename="opml.xml"');
6306
6307         print <<XML;
6308 <?xml version="1.0" encoding="utf-8"?>
6309 <opml version="1.0">
6310 <head>
6311   <title>$site_name OPML Export</title>
6312 </head>
6313 <body>
6314 <outline text="git RSS feeds">
6315 XML
6316
6317         foreach my $pr (@list) {
6318                 my %proj = %$pr;
6319                 my $head = git_get_head_hash($proj{'path'});
6320                 if (!defined $head) {
6321                         next;
6322                 }
6323                 $git_dir = "$projectroot/$proj{'path'}";
6324                 my %co = parse_commit($head);
6325                 if (!%co) {
6326                         next;
6327                 }
6328
6329                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6330                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6331                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6332                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6333         }
6334         print <<XML;
6335 </outline>
6336 </body>
6337 </opml>
6338 XML
6339 }