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 our $t0;
  22 if (eval { require Time::HiRes; 1; }) {
  23         $t0 = [Time::HiRes::gettimeofday()];
  24 }
  25 our $number_of_git_cmds = 0;
  26
  27 BEGIN {
  28         CGI->compile() if $ENV{'MOD_PERL'};
  29 }
  30
  31 our $cgi = new CGI;
  32 our $version = "++GIT_VERSION++";
  33 our $my_url = $cgi->url();
  34 our $my_uri = $cgi->url(-absolute => 1);
  35
  36 # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  37 # needed and used only for URLs with nonempty PATH_INFO
  38 our $base_url = $my_url;
  39
  40 # When the script is used as DirectoryIndex, the URL does not contain the name
  41 # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  42 # have to do it ourselves. We make $path_info global because it's also used
  43 # later on.
  44 #
  45 # Another issue with the script being the DirectoryIndex is that the resulting
  46 # $my_url data is not the full script URL: this is good, because we want
  47 # generated links to keep implying the script name if it wasn't explicitly
  48 # indicated in the URL we're handling, but it means that $my_url cannot be used
  49 # as base URL.
  50 # Therefore, if we needed to strip PATH_INFO, then we know that we have
  51 # to build the base URL ourselves:
  52 our $path_info = $ENV{"PATH_INFO"};
  53 if ($path_info) {
  54         if ($my_url =~ s,\Q$path_info\E$,, &&
  55             $my_uri =~ s,\Q$path_info\E$,, &&
  56             defined $ENV{'SCRIPT_NAME'}) {
  57                 $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  58         }
  59 }
  60
  61 # core git executable to use
  62 # this can just be "git" if your webserver has a sensible PATH
  63 our $GIT = "++GIT_BINDIR++/git";
  64
  65 # absolute fs-path which will be prepended to the project path
  66 #our $projectroot = "/pub/scm";
  67 our $projectroot = "++GITWEB_PROJECTROOT++";
  68
  69 # fs traversing limit for getting project list
  70 # the number is relative to the projectroot
  71 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  72
  73 # target of the home link on top of all pages
  74 our $home_link = $my_uri || "/";
  75
  76 # string of the home link on top of all pages
  77 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  78
  79 # name of your site or organization to appear in page titles
  80 # replace this with something more descriptive for clearer bookmarks
  81 our $site_name = "++GITWEB_SITENAME++"
  82                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  83
  84 # filename of html text to include at top of each page
  85 our $site_header = "++GITWEB_SITE_HEADER++";
  86 # html text to include at home page
  87 our $home_text = "++GITWEB_HOMETEXT++";
  88 # filename of html text to include at bottom of each page
  89 our $site_footer = "++GITWEB_SITE_FOOTER++";
  90
  91 # URI of stylesheets
  92 our @stylesheets = ("++GITWEB_CSS++");
  93 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  94 our $stylesheet = undef;
  95 # URI of GIT logo (72x27 size)
  96 our $logo = "++GITWEB_LOGO++";
  97 # URI of GIT favicon, assumed to be image/png type
  98 our $favicon = "++GITWEB_FAVICON++";
  99 # URI of gitweb.js (JavaScript code for gitweb)
 100 our $javascript = "++GITWEB_JS++";
 101
 102 # URI and label (title) of GIT logo link
 103 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 104 #our $logo_label = "git documentation";
 105 our $logo_url = "http://git-scm.com/";
 106 our $logo_label = "git homepage";
 107
 108 # source of projects list
 109 our $projects_list = "++GITWEB_LIST++";
 110
 111 # the width (in characters) of the projects list "Description" column
 112 our $projects_list_description_width = 25;
 113
 114 # default order of projects list
 115 # valid values are none, project, descr, owner, and age
 116 our $default_projects_order = "project";
 117
 118 # show repository only if this file exists
 119 # (only effective if this variable evaluates to true)
 120 our $export_ok = "++GITWEB_EXPORT_OK++";
 121
 122 # show repository only if this subroutine returns true
 123 # when given the path to the project, for example:
 124 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 125 our $export_auth_hook = undef;
 126
 127 # only allow viewing of repositories also shown on the overview page
 128 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 129
 130 # list of git base URLs used for URL to where fetch project from,
 131 # i.e. full URL is "$git_base_url/$project"
 132 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 133
 134 # default blob_plain mimetype and default charset for text/plain blob
 135 our $default_blob_plain_mimetype = 'text/plain';
 136 our $default_text_plain_charset  = undef;
 137
 138 # file to use for guessing MIME types before trying /etc/mime.types
 139 # (relative to the current git repository)
 140 our $mimetypes_file = undef;
 141
 142 # assume this charset if line contains non-UTF-8 characters;
 143 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 144 # for which encoding all byte sequences are valid, for example
 145 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 146 # could be even 'utf-8' for the old behavior)
 147 our $fallback_encoding = 'latin1';
 148
 149 # rename detection options for git-diff and git-diff-tree
 150 # - default is '-M', with the cost proportional to
 151 #   (number of removed files) * (number of new files).
 152 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 153 #   (number of changed files + number of removed files) * (number of new files)
 154 # - even more costly is '-C', '--find-copies-harder' with cost
 155 #   (number of files in the original tree) * (number of new files)
 156 # - one might want to include '-B' option, e.g. '-B', '-M'
 157 our @diff_opts = ('-M'); # taken from git_commit
 158
 159 # Disables features that would allow repository owners to inject script into
 160 # the gitweb domain.
 161 our $prevent_xss = 0;
 162
 163 # information about snapshot formats that gitweb is capable of serving
 164 our %known_snapshot_formats = (
 165         # name => {
 166         #       'display' => display name,
 167         #       'type' => mime type,
 168         #       'suffix' => filename suffix,
 169         #       'format' => --format for git-archive,
 170         #       'compressor' => [compressor command and arguments]
 171         #                       (array reference, optional)
 172         #       'disabled' => boolean (optional)}
 173         #
 174         'tgz' => {
 175                 'display' => 'tar.gz',
 176                 'type' => 'application/x-gzip',
 177                 'suffix' => '.tar.gz',
 178                 'format' => 'tar',
 179                 'compressor' => ['gzip']},
 180
 181         'tbz2' => {
 182                 'display' => 'tar.bz2',
 183                 'type' => 'application/x-bzip2',
 184                 'suffix' => '.tar.bz2',
 185                 'format' => 'tar',
 186                 'compressor' => ['bzip2']},
 187
 188         'txz' => {
 189                 'display' => 'tar.xz',
 190                 'type' => 'application/x-xz',
 191                 'suffix' => '.tar.xz',
 192                 'format' => 'tar',
 193                 'compressor' => ['xz'],
 194                 'disabled' => 1},
 195
 196         'zip' => {
 197                 'display' => 'zip',
 198                 'type' => 'application/x-zip',
 199                 'suffix' => '.zip',
 200                 'format' => 'zip'},
 201 );
 202
 203 # Aliases so we understand old gitweb.snapshot values in repository
 204 # configuration.
 205 our %known_snapshot_format_aliases = (
 206         'gzip'  => 'tgz',
 207         'bzip2' => 'tbz2',
 208         'xz'    => 'txz',
 209
 210         # backward compatibility: legacy gitweb config support
 211         'x-gzip' => undef, 'gz' => undef,
 212         'x-bzip2' => undef, 'bz2' => undef,
 213         'x-zip' => undef, '' => undef,
 214 );
 215
 216 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 217 # are changed, it may be appropriate to change these values too via
 218 # $GITWEB_CONFIG.
 219 our %avatar_size = (
 220         'default' => 16,
 221         'double'  => 32
 222 );
 223
 224 # Used to set the maximum load that we will still respond to gitweb queries.
 225 # If server load exceed this value then return "503 server busy" error.
 226 # If gitweb cannot determined server load, it is taken to be 0.
 227 # Leave it undefined (or set to 'undef') to turn off load checking.
 228 our $maxload = 300;
 229
 230 # You define site-wide feature defaults here; override them with
 231 # $GITWEB_CONFIG as necessary.
 232 our %feature = (
 233         # feature => {
 234         #       'sub' => feature-sub (subroutine),
 235         #       'override' => allow-override (boolean),
 236         #       'default' => [ default options...] (array reference)}
 237         #
 238         # if feature is overridable (it means that allow-override has true value),
 239         # then feature-sub will be called with default options as parameters;
 240         # return value of feature-sub indicates if to enable specified feature
 241         #
 242         # if there is no 'sub' key (no feature-sub), then feature cannot be
 243         # overriden
 244         #
 245         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 246         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 247         # is enabled
 248
 249         # Enable the 'blame' blob view, showing the last commit that modified
 250         # each line in the file. This can be very CPU-intensive.
 251
 252         # To enable system wide have in $GITWEB_CONFIG
 253         # $feature{'blame'}{'default'} = [1];
 254         # To have project specific config enable override in $GITWEB_CONFIG
 255         # $feature{'blame'}{'override'} = 1;
 256         # and in project config gitweb.blame = 0|1;
 257         'blame' => {
 258                 'sub' => sub { feature_bool('blame', @_) },
 259                 'override' => 0,
 260                 'default' => [0]},
 261
 262         # Enable the 'snapshot' link, providing a compressed archive of any
 263         # tree. This can potentially generate high traffic if you have large
 264         # project.
 265
 266         # Value is a list of formats defined in %known_snapshot_formats that
 267         # you wish to offer.
 268         # To disable system wide have in $GITWEB_CONFIG
 269         # $feature{'snapshot'}{'default'} = [];
 270         # To have project specific config enable override in $GITWEB_CONFIG
 271         # $feature{'snapshot'}{'override'} = 1;
 272         # and in project config, a comma-separated list of formats or "none"
 273         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 274         'snapshot' => {
 275                 'sub' => \&feature_snapshot,
 276                 'override' => 0,
 277                 'default' => ['tgz']},
 278
 279         # Enable text search, which will list the commits which match author,
 280         # committer or commit text to a given string.  Enabled by default.
 281         # Project specific override is not supported.
 282         'search' => {
 283                 'override' => 0,
 284                 'default' => [1]},
 285
 286         # Enable grep search, which will list the files in currently selected
 287         # tree containing the given string. Enabled by default. This can be
 288         # potentially CPU-intensive, of course.
 289
 290         # To enable system wide have in $GITWEB_CONFIG
 291         # $feature{'grep'}{'default'} = [1];
 292         # To have project specific config enable override in $GITWEB_CONFIG
 293         # $feature{'grep'}{'override'} = 1;
 294         # and in project config gitweb.grep = 0|1;
 295         'grep' => {
 296                 'sub' => sub { feature_bool('grep', @_) },
 297                 'override' => 0,
 298                 'default' => [1]},
 299
 300         # Enable the pickaxe search, which will list the commits that modified
 301         # a given string in a file. This can be practical and quite faster
 302         # alternative to 'blame', but still potentially CPU-intensive.
 303
 304         # To enable system wide have in $GITWEB_CONFIG
 305         # $feature{'pickaxe'}{'default'} = [1];
 306         # To have project specific config enable override in $GITWEB_CONFIG
 307         # $feature{'pickaxe'}{'override'} = 1;
 308         # and in project config gitweb.pickaxe = 0|1;
 309         'pickaxe' => {
 310                 'sub' => sub { feature_bool('pickaxe', @_) },
 311                 'override' => 0,
 312                 'default' => [1]},
 313
 314         # Enable showing size of blobs in a 'tree' view, in a separate
 315         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 316
 317         # To disable system wide have in $GITWEB_CONFIG
 318         # $feature{'show-sizes'}{'default'} = [0];
 319         # To have project specific config enable override in $GITWEB_CONFIG
 320         # $feature{'show-sizes'}{'override'} = 1;
 321         # and in project config gitweb.showsizes = 0|1;
 322         'show-sizes' => {
 323                 'sub' => sub { feature_bool('showsizes', @_) },
 324                 'override' => 0,
 325                 'default' => [1]},
 326
 327         # Make gitweb use an alternative format of the URLs which can be
 328         # more readable and natural-looking: project name is embedded
 329         # directly in the path and the query string contains other
 330         # auxiliary information. All gitweb installations recognize
 331         # URL in either format; this configures in which formats gitweb
 332         # generates links.
 333
 334         # To enable system wide have in $GITWEB_CONFIG
 335         # $feature{'pathinfo'}{'default'} = [1];
 336         # Project specific override is not supported.
 337
 338         # Note that you will need to change the default location of CSS,
 339         # favicon, logo and possibly other files to an absolute URL. Also,
 340         # if gitweb.cgi serves as your indexfile, you will need to force
 341         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 342         'pathinfo' => {
 343                 'override' => 0,
 344                 'default' => [0]},
 345
 346         # Make gitweb consider projects in project root subdirectories
 347         # to be forks of existing projects. Given project $projname.git,
 348         # projects matching $projname/*.git will not be shown in the main
 349         # projects list, instead a '+' mark will be added to $projname
 350         # there and a 'forks' view will be enabled for the project, listing
 351         # all the forks. If project list is taken from a file, forks have
 352         # to be listed after the main project.
 353
 354         # To enable system wide have in $GITWEB_CONFIG
 355         # $feature{'forks'}{'default'} = [1];
 356         # Project specific override is not supported.
 357         'forks' => {
 358                 'override' => 0,
 359                 'default' => [0]},
 360
 361         # Insert custom links to the action bar of all project pages.
 362         # This enables you mainly to link to third-party scripts integrating
 363         # into gitweb; e.g. git-browser for graphical history representation
 364         # or custom web-based repository administration interface.
 365
 366         # The 'default' value consists of a list of triplets in the form
 367         # (label, link, position) where position is the label after which
 368         # to insert the link and link is a format string where %n expands
 369         # to the project name, %f to the project path within the filesystem,
 370         # %h to the current hash (h gitweb parameter) and %b to the current
 371         # hash base (hb gitweb parameter); %% expands to %.
 372
 373         # To enable system wide have in $GITWEB_CONFIG e.g.
 374         # $feature{'actions'}{'default'} = [('graphiclog',
 375         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 376         # Project specific override is not supported.
 377         'actions' => {
 378                 'override' => 0,
 379                 'default' => []},
 380
 381         # Allow gitweb scan project content tags described in ctags/
 382         # of project repository, and display the popular Web 2.0-ish
 383         # "tag cloud" near the project list. Note that this is something
 384         # COMPLETELY different from the normal Git tags.
 385
 386         # gitweb by itself can show existing tags, but it does not handle
 387         # tagging itself; you need an external application for that.
 388         # For an example script, check Girocco's cgi/tagproj.cgi.
 389         # You may want to install the HTML::TagCloud Perl module to get
 390         # a pretty tag cloud instead of just a list of tags.
 391
 392         # To enable system wide have in $GITWEB_CONFIG
 393         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 394         # Project specific override is not supported.
 395         'ctags' => {
 396                 'override' => 0,
 397                 'default' => [0]},
 398
 399         # The maximum number of patches in a patchset generated in patch
 400         # view. Set this to 0 or undef to disable patch view, or to a
 401         # negative number to remove any limit.
 402
 403         # To disable system wide have in $GITWEB_CONFIG
 404         # $feature{'patches'}{'default'} = [0];
 405         # To have project specific config enable override in $GITWEB_CONFIG
 406         # $feature{'patches'}{'override'} = 1;
 407         # and in project config gitweb.patches = 0|n;
 408         # where n is the maximum number of patches allowed in a patchset.
 409         'patches' => {
 410                 'sub' => \&feature_patches,
 411                 'override' => 0,
 412                 'default' => [16]},
 413
 414         # Avatar support. When this feature is enabled, views such as
 415         # shortlog or commit will display an avatar associated with
 416         # the email of the committer(s) and/or author(s).
 417
 418         # Currently available providers are gravatar and picon.
 419         # If an unknown provider is specified, the feature is disabled.
 420
 421         # Gravatar depends on Digest::MD5.
 422         # Picon currently relies on the indiana.edu database.
 423
 424         # To enable system wide have in $GITWEB_CONFIG
 425         # $feature{'avatar'}{'default'} = ['<provider>'];
 426         # where <provider> is either gravatar or picon.
 427         # To have project specific config enable override in $GITWEB_CONFIG
 428         # $feature{'avatar'}{'override'} = 1;
 429         # and in project config gitweb.avatar = <provider>;
 430         'avatar' => {
 431                 'sub' => \&feature_avatar,
 432                 'override' => 0,
 433                 'default' => ['']},
 434
 435         # Enable displaying how much time and how many git commands
 436         # it took to generate and display page.  Disabled by default.
 437         # Project specific override is not supported.
 438         'timed' => {
 439                 'override' => 0,
 440                 'default' => [0]},
 441
 442         # Enable turning some links into links to actions which require
 443         # JavaScript to run (like 'blame_incremental').  Not enabled by
 444         # default.  Project specific override is currently not supported.
 445         'javascript-actions' => {
 446                 'override' => 0,
 447                 'default' => [0]},
 448 );
 449
 450 sub gitweb_get_feature {
 451         my ($name) = @_;
 452         return unless exists $feature{$name};
 453         my ($sub, $override, @defaults) = (
 454                 $feature{$name}{'sub'},
 455                 $feature{$name}{'override'},
 456                 @{$feature{$name}{'default'}});
 457         # project specific override is possible only if we have project
 458         our $git_dir; # global variable, declared later
 459         if (!$override || !defined $git_dir) {
 460                 return @defaults;
 461         }
 462         if (!defined $sub) {
 463                 warn "feature $name is not overridable";
 464                 return @defaults;
 465         }
 466         return $sub->(@defaults);
 467 }
 468
 469 # A wrapper to check if a given feature is enabled.
 470 # With this, you can say
 471 #
 472 #   my $bool_feat = gitweb_check_feature('bool_feat');
 473 #   gitweb_check_feature('bool_feat') or somecode;
 474 #
 475 # instead of
 476 #
 477 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 478 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 479 #
 480 sub gitweb_check_feature {
 481         return (gitweb_get_feature(@_))[0];
 482 }
 483
 484
 485 sub feature_bool {
 486         my $key = shift;
 487         my ($val) = git_get_project_config($key, '--bool');
 488
 489         if (!defined $val) {
 490                 return ($_[0]);
 491         } elsif ($val eq 'true') {
 492                 return (1);
 493         } elsif ($val eq 'false') {
 494                 return (0);
 495         }
 496 }
 497
 498 sub feature_snapshot {
 499         my (@fmts) = @_;
 500
 501         my ($val) = git_get_project_config('snapshot');
 502
 503         if ($val) {
 504                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 505         }
 506
 507         return @fmts;
 508 }
 509
 510 sub feature_patches {
 511         my @val = (git_get_project_config('patches', '--int'));
 512
 513         if (@val) {
 514                 return @val;
 515         }
 516
 517         return ($_[0]);
 518 }
 519
 520 sub feature_avatar {
 521         my @val = (git_get_project_config('avatar'));
 522
 523         return @val ? @val : @_;
 524 }
 525
 526 # checking HEAD file with -e is fragile if the repository was
 527 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 528 # and then pruned.
 529 sub check_head_link {
 530         my ($dir) = @_;
 531         my $headfile = "$dir/HEAD";
 532         return ((-e $headfile) ||
 533                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 534 }
 535
 536 sub check_export_ok {
 537         my ($dir) = @_;
 538         return (check_head_link($dir) &&
 539                 (!$export_ok || -e "$dir/$export_ok") &&
 540                 (!$export_auth_hook || $export_auth_hook->($dir)));
 541 }
 542
 543 # process alternate names for backward compatibility
 544 # filter out unsupported (unknown) snapshot formats
 545 sub filter_snapshot_fmts {
 546         my @fmts = @_;
 547
 548         @fmts = map {
 549                 exists $known_snapshot_format_aliases{$_} ?
 550                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 551         @fmts = grep {
 552                 exists $known_snapshot_formats{$_} &&
 553                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 554 }
 555
 556 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 557 our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 558 # die if there are errors parsing config file
 559 if (-e $GITWEB_CONFIG) {
 560         do $GITWEB_CONFIG;
 561         die $@ if $@;
 562 } elsif (-e $GITWEB_CONFIG_SYSTEM) {
 563         do $GITWEB_CONFIG_SYSTEM;
 564         die $@ if $@;
 565 }
 566
 567 # Get loadavg of system, to compare against $maxload.
 568 # Currently it requires '/proc/loadavg' present to get loadavg;
 569 # if it is not present it returns 0, which means no load checking.
 570 sub get_loadavg {
 571         if( -e '/proc/loadavg' ){
 572                 open my $fd, '<', '/proc/loadavg'
 573                         or return 0;
 574                 my @load = split(/\s+/, scalar <$fd>);
 575                 close $fd;
 576
 577                 # The first three columns measure CPU and IO utilization of the last one,
 578                 # five, and 10 minute periods.  The fourth column shows the number of
 579                 # currently running processes and the total number of processes in the m/n
 580                 # format.  The last column displays the last process ID used.
 581                 return $load[0] || 0;
 582         }
 583         # additional checks for load average should go here for things that don't export
 584         # /proc/loadavg
 585
 586         return 0;
 587 }
 588
 589 # version of the core git binary
 590 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 591 $number_of_git_cmds++;
 592
 593 $projects_list ||= $projectroot;
 594
 595 if (defined $maxload && get_loadavg() > $maxload) {
 596         die_error(503, "The load average on the server is too high");
 597 }
 598
 599 # ======================================================================
 600 # input validation and dispatch
 601
 602 # input parameters can be collected from a variety of sources (presently, CGI
 603 # and PATH_INFO), so we define an %input_params hash that collects them all
 604 # together during validation: this allows subsequent uses (e.g. href()) to be
 605 # agnostic of the parameter origin
 606
 607 our %input_params = ();
 608
 609 # input parameters are stored with the long parameter name as key. This will
 610 # also be used in the href subroutine to convert parameters to their CGI
 611 # equivalent, and since the href() usage is the most frequent one, we store
 612 # the name -> CGI key mapping here, instead of the reverse.
 613 #
 614 # XXX: Warning: If you touch this, check the search form for updating,
 615 # too.
 616
 617 our @cgi_param_mapping = (
 618         project => "p",
 619         action => "a",
 620         file_name => "f",
 621         file_parent => "fp",
 622         hash => "h",
 623         hash_parent => "hp",
 624         hash_base => "hb",
 625         hash_parent_base => "hpb",
 626         page => "pg",
 627         order => "o",
 628         searchtext => "s",
 629         searchtype => "st",
 630         snapshot_format => "sf",
 631         extra_options => "opt",
 632         search_use_regexp => "sr",
 633         # this must be last entry (for manipulation from JavaScript)
 634         javascript => "js"
 635 );
 636 our %cgi_param_mapping = @cgi_param_mapping;
 637
 638 # we will also need to know the possible actions, for validation
 639 our %actions = (
 640         "blame" => \&git_blame,
 641         "blame_incremental" => \&git_blame_incremental,
 642         "blame_data" => \&git_blame_data,
 643         "blobdiff" => \&git_blobdiff,
 644         "blobdiff_plain" => \&git_blobdiff_plain,
 645         "blob" => \&git_blob,
 646         "blob_plain" => \&git_blob_plain,
 647         "commitdiff" => \&git_commitdiff,
 648         "commitdiff_plain" => \&git_commitdiff_plain,
 649         "commit" => \&git_commit,
 650         "forks" => \&git_forks,
 651         "heads" => \&git_heads,
 652         "history" => \&git_history,
 653         "log" => \&git_log,
 654         "patch" => \&git_patch,
 655         "patches" => \&git_patches,
 656         "rss" => \&git_rss,
 657         "atom" => \&git_atom,
 658         "search" => \&git_search,
 659         "search_help" => \&git_search_help,
 660         "shortlog" => \&git_shortlog,
 661         "summary" => \&git_summary,
 662         "tag" => \&git_tag,
 663         "tags" => \&git_tags,
 664         "tree" => \&git_tree,
 665         "snapshot" => \&git_snapshot,
 666         "object" => \&git_object,
 667         # those below don't need $project
 668         "opml" => \&git_opml,
 669         "project_list" => \&git_project_list,
 670         "project_index" => \&git_project_index,
 671 );
 672
 673 # finally, we have the hash of allowed extra_options for the commands that
 674 # allow them
 675 our %allowed_options = (
 676         "--no-merges" => [ qw(rss atom log shortlog history) ],
 677 );
 678
 679 # fill %input_params with the CGI parameters. All values except for 'opt'
 680 # should be single values, but opt can be an array. We should probably
 681 # build an array of parameters that can be multi-valued, but since for the time
 682 # being it's only this one, we just single it out
 683 while (my ($name, $symbol) = each %cgi_param_mapping) {
 684         if ($symbol eq 'opt') {
 685                 $input_params{$name} = [ $cgi->param($symbol) ];
 686         } else {
 687                 $input_params{$name} = $cgi->param($symbol);
 688         }
 689 }
 690
 691 # now read PATH_INFO and update the parameter list for missing parameters
 692 sub evaluate_path_info {
 693         return if defined $input_params{'project'};
 694         return if !$path_info;
 695         $path_info =~ s,^/+,,;
 696         return if !$path_info;
 697
 698         # find which part of PATH_INFO is project
 699         my $project = $path_info;
 700         $project =~ s,/+$,,;
 701         while ($project && !check_head_link("$projectroot/$project")) {
 702                 $project =~ s,/*[^/]*$,,;
 703         }
 704         return unless $project;
 705         $input_params{'project'} = $project;
 706
 707         # do not change any parameters if an action is given using the query string
 708         return if $input_params{'action'};
 709         $path_info =~ s,^\Q$project\E/*,,;
 710
 711         # next, check if we have an action
 712         my $action = $path_info;
 713         $action =~ s,/.*$,,;
 714         if (exists $actions{$action}) {
 715                 $path_info =~ s,^$action/*,,;
 716                 $input_params{'action'} = $action;
 717         }
 718
 719         # list of actions that want hash_base instead of hash, but can have no
 720         # pathname (f) parameter
 721         my @wants_base = (
 722                 'tree',
 723                 'history',
 724         );
 725
 726         # we want to catch
 727         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 728         my ($parentrefname, $parentpathname, $refname, $pathname) =
 729                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 730
 731         # first, analyze the 'current' part
 732         if (defined $pathname) {
 733                 # we got "branch:filename" or "branch:dir/"
 734                 # we could use git_get_type(branch:pathname), but:
 735                 # - it needs $git_dir
 736                 # - it does a git() call
 737                 # - the convention of terminating directories with a slash
 738                 #   makes it superfluous
 739                 # - embedding the action in the PATH_INFO would make it even
 740                 #   more superfluous
 741                 $pathname =~ s,^/+,,;
 742                 if (!$pathname || substr($pathname, -1) eq "/") {
 743                         $input_params{'action'} ||= "tree";
 744                         $pathname =~ s,/$,,;
 745                 } else {
 746                         # the default action depends on whether we had parent info
 747                         # or not
 748                         if ($parentrefname) {
 749                                 $input_params{'action'} ||= "blobdiff_plain";
 750                         } else {
 751                                 $input_params{'action'} ||= "blob_plain";
 752                         }
 753                 }
 754                 $input_params{'hash_base'} ||= $refname;
 755                 $input_params{'file_name'} ||= $pathname;
 756         } elsif (defined $refname) {
 757                 # we got "branch". In this case we have to choose if we have to
 758                 # set hash or hash_base.
 759                 #
 760                 # Most of the actions without a pathname only want hash to be
 761                 # set, except for the ones specified in @wants_base that want
 762                 # hash_base instead. It should also be noted that hand-crafted
 763                 # links having 'history' as an action and no pathname or hash
 764                 # set will fail, but that happens regardless of PATH_INFO.
 765                 $input_params{'action'} ||= "shortlog";
 766                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 767                         $input_params{'hash_base'} ||= $refname;
 768                 } else {
 769                         $input_params{'hash'} ||= $refname;
 770                 }
 771         }
 772
 773         # next, handle the 'parent' part, if present
 774         if (defined $parentrefname) {
 775                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 776                 # someproject/blobdiff/oldrev..newrev:/filename
 777                 if ($parentpathname) {
 778                         $parentpathname =~ s,^/+,,;
 779                         $parentpathname =~ s,/$,,;
 780                         $input_params{'file_parent'} ||= $parentpathname;
 781                 } else {
 782                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 783                 }
 784                 # we assume that hash_parent_base is wanted if a path was specified,
 785                 # or if the action wants hash_base instead of hash
 786                 if (defined $input_params{'file_parent'} ||
 787                         grep { $_ eq $input_params{'action'} } @wants_base) {
 788                         $input_params{'hash_parent_base'} ||= $parentrefname;
 789                 } else {
 790                         $input_params{'hash_parent'} ||= $parentrefname;
 791                 }
 792         }
 793
 794         # for the snapshot action, we allow URLs in the form
 795         # $project/snapshot/$hash.ext
 796         # where .ext determines the snapshot and gets removed from the
 797         # passed $refname to provide the $hash.
 798         #
 799         # To be able to tell that $refname includes the format extension, we
 800         # require the following two conditions to be satisfied:
 801         # - the hash input parameter MUST have been set from the $refname part
 802         #   of the URL (i.e. they must be equal)
 803         # - the snapshot format MUST NOT have been defined already (e.g. from
 804         #   CGI parameter sf)
 805         # It's also useless to try any matching unless $refname has a dot,
 806         # so we check for that too
 807         if (defined $input_params{'action'} &&
 808                 $input_params{'action'} eq 'snapshot' &&
 809                 defined $refname && index($refname, '.') != -1 &&
 810                 $refname eq $input_params{'hash'} &&
 811                 !defined $input_params{'snapshot_format'}) {
 812                 # We loop over the known snapshot formats, checking for
 813                 # extensions. Allowed extensions are both the defined suffix
 814                 # (which includes the initial dot already) and the snapshot
 815                 # format key itself, with a prepended dot
 816                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 817                         my $hash = $refname;
 818                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 819                                 next;
 820                         }
 821                         my $sfx = $1;
 822                         # a valid suffix was found, so set the snapshot format
 823                         # and reset the hash parameter
 824                         $input_params{'snapshot_format'} = $fmt;
 825                         $input_params{'hash'} = $hash;
 826                         # we also set the format suffix to the one requested
 827                         # in the URL: this way a request for e.g. .tgz returns
 828                         # a .tgz instead of a .tar.gz
 829                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 830                         last;
 831                 }
 832         }
 833 }
 834 evaluate_path_info();
 835
 836 our $action = $input_params{'action'};
 837 if (defined $action) {
 838         if (!validate_action($action)) {
 839                 die_error(400, "Invalid action parameter");
 840         }
 841 }
 842
 843 # parameters which are pathnames
 844 our $project = $input_params{'project'};
 845 if (defined $project) {
 846         if (!validate_project($project)) {
 847                 undef $project;
 848                 die_error(404, "No such project");
 849         }
 850 }
 851
 852 our $file_name = $input_params{'file_name'};
 853 if (defined $file_name) {
 854         if (!validate_pathname($file_name)) {
 855                 die_error(400, "Invalid file parameter");
 856         }
 857 }
 858
 859 our $file_parent = $input_params{'file_parent'};
 860 if (defined $file_parent) {
 861         if (!validate_pathname($file_parent)) {
 862                 die_error(400, "Invalid file parent parameter");
 863         }
 864 }
 865
 866 # parameters which are refnames
 867 our $hash = $input_params{'hash'};
 868 if (defined $hash) {
 869         if (!validate_refname($hash)) {
 870                 die_error(400, "Invalid hash parameter");
 871         }
 872 }
 873
 874 our $hash_parent = $input_params{'hash_parent'};
 875 if (defined $hash_parent) {
 876         if (!validate_refname($hash_parent)) {
 877                 die_error(400, "Invalid hash parent parameter");
 878         }
 879 }
 880
 881 our $hash_base = $input_params{'hash_base'};
 882 if (defined $hash_base) {
 883         if (!validate_refname($hash_base)) {
 884                 die_error(400, "Invalid hash base parameter");
 885         }
 886 }
 887
 888 our @extra_options = @{$input_params{'extra_options'}};
 889 # @extra_options is always defined, since it can only be (currently) set from
 890 # CGI, and $cgi->param() returns the empty array in array context if the param
 891 # is not set
 892 foreach my $opt (@extra_options) {
 893         if (not exists $allowed_options{$opt}) {
 894                 die_error(400, "Invalid option parameter");
 895         }
 896         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 897                 die_error(400, "Invalid option parameter for this action");
 898         }
 899 }
 900
 901 our $hash_parent_base = $input_params{'hash_parent_base'};
 902 if (defined $hash_parent_base) {
 903         if (!validate_refname($hash_parent_base)) {
 904                 die_error(400, "Invalid hash parent base parameter");
 905         }
 906 }
 907
 908 # other parameters
 909 our $page = $input_params{'page'};
 910 if (defined $page) {
 911         if ($page =~ m/[^0-9]/) {
 912                 die_error(400, "Invalid page parameter");
 913         }
 914 }
 915
 916 our $searchtype = $input_params{'searchtype'};
 917 if (defined $searchtype) {
 918         if ($searchtype =~ m/[^a-z]/) {
 919                 die_error(400, "Invalid searchtype parameter");
 920         }
 921 }
 922
 923 our $search_use_regexp = $input_params{'search_use_regexp'};
 924
 925 our $searchtext = $input_params{'searchtext'};
 926 our $search_regexp;
 927 if (defined $searchtext) {
 928         if (length($searchtext) < 2) {
 929                 die_error(403, "At least two characters are required for search parameter");
 930         }
 931         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 932 }
 933
 934 # path to the current git repository
 935 our $git_dir;
 936 $git_dir = "$projectroot/$project" if $project;
 937
 938 # list of supported snapshot formats
 939 our @snapshot_fmts = gitweb_get_feature('snapshot');
 940 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 941
 942 # check that the avatar feature is set to a known provider name,
 943 # and for each provider check if the dependencies are satisfied.
 944 # if the provider name is invalid or the dependencies are not met,
 945 # reset $git_avatar to the empty string.
 946 our ($git_avatar) = gitweb_get_feature('avatar');
 947 if ($git_avatar eq 'gravatar') {
 948         $git_avatar = '' unless (eval { require Digest::MD5; 1; });
 949 } elsif ($git_avatar eq 'picon') {
 950         # no dependencies
 951 } else {
 952         $git_avatar = '';
 953 }
 954
 955 # dispatch
 956 if (!defined $action) {
 957         if (defined $hash) {
 958                 $action = git_get_type($hash);
 959         } elsif (defined $hash_base && defined $file_name) {
 960                 $action = git_get_type("$hash_base:$file_name");
 961         } elsif (defined $project) {
 962                 $action = 'summary';
 963         } else {
 964                 $action = 'project_list';
 965         }
 966 }
 967 if (!defined($actions{$action})) {
 968         die_error(400, "Unknown action");
 969 }
 970 if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
 971     !$project) {
 972         die_error(400, "Project needed");
 973 }
 974 $actions{$action}->();
 975 exit;
 976
 977 ## ======================================================================
 978 ## action links
 979
 980 sub href {
 981         my %params = @_;
 982         # default is to use -absolute url() i.e. $my_uri
 983         my $href = $params{-full} ? $my_url : $my_uri;
 984
 985         $params{'project'} = $project unless exists $params{'project'};
 986
 987         if ($params{-replay}) {
 988                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 989                         if (!exists $params{$name}) {
 990                                 $params{$name} = $input_params{$name};
 991                         }
 992                 }
 993         }
 994
 995         my $use_pathinfo = gitweb_check_feature('pathinfo');
 996         if ($use_pathinfo and defined $params{'project'}) {
 997                 # try to put as many parameters as possible in PATH_INFO:
 998                 #   - project name
 999                 #   - action
1000                 #   - hash_parent or hash_parent_base:/file_parent
1001                 #   - hash or hash_base:/filename
1002                 #   - the snapshot_format as an appropriate suffix
1003
1004                 # When the script is the root DirectoryIndex for the domain,
1005                 # $href here would be something like http://gitweb.example.com/
1006                 # Thus, we strip any trailing / from $href, to spare us double
1007                 # slashes in the final URL
1008                 $href =~ s,/$,,;
1009
1010                 # Then add the project name, if present
1011                 $href .= "/".esc_url($params{'project'});
1012                 delete $params{'project'};
1013
1014                 # since we destructively absorb parameters, we keep this
1015                 # boolean that remembers if we're handling a snapshot
1016                 my $is_snapshot = $params{'action'} eq 'snapshot';
1017
1018                 # Summary just uses the project path URL, any other action is
1019                 # added to the URL
1020                 if (defined $params{'action'}) {
1021                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
1022                         delete $params{'action'};
1023                 }
1024
1025                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1026                 # stripping nonexistent or useless pieces
1027                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1028                         || $params{'hash_parent'} || $params{'hash'});
1029                 if (defined $params{'hash_base'}) {
1030                         if (defined $params{'hash_parent_base'}) {
1031                                 $href .= esc_url($params{'hash_parent_base'});
1032                                 # skip the file_parent if it's the same as the file_name
1033                                 if (defined $params{'file_parent'}) {
1034                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1035                                                 delete $params{'file_parent'};
1036                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1037                                                 $href .= ":/".esc_url($params{'file_parent'});
1038                                                 delete $params{'file_parent'};
1039                                         }
1040                                 }
1041                                 $href .= "..";
1042                                 delete $params{'hash_parent'};
1043                                 delete $params{'hash_parent_base'};
1044                         } elsif (defined $params{'hash_parent'}) {
1045                                 $href .= esc_url($params{'hash_parent'}). "..";
1046                                 delete $params{'hash_parent'};
1047                         }
1048
1049                         $href .= esc_url($params{'hash_base'});
1050                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1051                                 $href .= ":/".esc_url($params{'file_name'});
1052                                 delete $params{'file_name'};
1053                         }
1054                         delete $params{'hash'};
1055                         delete $params{'hash_base'};
1056                 } elsif (defined $params{'hash'}) {
1057                         $href .= esc_url($params{'hash'});
1058                         delete $params{'hash'};
1059                 }
1060
1061                 # If the action was a snapshot, we can absorb the
1062                 # snapshot_format parameter too
1063                 if ($is_snapshot) {
1064                         my $fmt = $params{'snapshot_format'};
1065                         # snapshot_format should always be defined when href()
1066                         # is called, but just in case some code forgets, we
1067                         # fall back to the default
1068                         $fmt ||= $snapshot_fmts[0];
1069                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1070                         delete $params{'snapshot_format'};
1071                 }
1072         }
1073
1074         # now encode the parameters explicitly
1075         my @result = ();
1076         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1077                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1078                 if (defined $params{$name}) {
1079                         if (ref($params{$name}) eq "ARRAY") {
1080                                 foreach my $par (@{$params{$name}}) {
1081                                         push @result, $symbol . "=" . esc_param($par);
1082                                 }
1083                         } else {
1084                                 push @result, $symbol . "=" . esc_param($params{$name});
1085                         }
1086                 }
1087         }
1088         $href .= "?" . join(';', @result) if scalar @result;
1089
1090         return $href;
1091 }
1092
1093
1094 ## ======================================================================
1095 ## validation, quoting/unquoting and escaping
1096
1097 sub validate_action {
1098         my $input = shift || return undef;
1099         return undef unless exists $actions{$input};
1100         return $input;
1101 }
1102
1103 sub validate_project {
1104         my $input = shift || return undef;
1105         if (!validate_pathname($input) ||
1106                 !(-d "$projectroot/$input") ||
1107                 !check_export_ok("$projectroot/$input") ||
1108                 ($strict_export && !project_in_list($input))) {
1109                 return undef;
1110         } else {
1111                 return $input;
1112         }
1113 }
1114
1115 sub validate_pathname {
1116         my $input = shift || return undef;
1117
1118         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1119         # at the beginning, at the end, and between slashes.
1120         # also this catches doubled slashes
1121         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1122                 return undef;
1123         }
1124         # no null characters
1125         if ($input =~ m!\0!) {
1126                 return undef;
1127         }
1128         return $input;
1129 }
1130
1131 sub validate_refname {
1132         my $input = shift || return undef;
1133
1134         # textual hashes are O.K.
1135         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1136                 return $input;
1137         }
1138         # it must be correct pathname
1139         $input = validate_pathname($input)
1140                 or return undef;
1141         # restrictions on ref name according to git-check-ref-format
1142         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1143                 return undef;
1144         }
1145         return $input;
1146 }
1147
1148 # decode sequences of octets in utf8 into Perl's internal form,
1149 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1150 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1151 sub to_utf8 {
1152         my $str = shift;
1153         return undef unless defined $str;
1154         if (utf8::valid($str)) {
1155                 utf8::decode($str);
1156                 return $str;
1157         } else {
1158                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1159         }
1160 }
1161
1162 # quote unsafe chars, but keep the slash, even when it's not
1163 # correct, but quoted slashes look too horrible in bookmarks
1164 sub esc_param {
1165         my $str = shift;
1166         return undef unless defined $str;
1167         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1168         $str =~ s/ /\+/g;
1169         return $str;
1170 }
1171
1172 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1173 sub esc_url {
1174         my $str = shift;
1175         return undef unless defined $str;
1176         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1177         $str =~ s/ /\+/g;
1178         return $str;
1179 }
1180
1181 # quote unsafe characters in HTML attributes
1182 sub esc_attr {
1183
1184         # for XHTML conformance escaping '"' to '&quot;' is not enough
1185         return esc_html(@_);
1186 }
1187
1188 # replace invalid utf8 character with SUBSTITUTION sequence
1189 sub esc_html {
1190         my $str = shift;
1191         my %opts = @_;
1192
1193         return undef unless defined $str;
1194
1195         $str = to_utf8($str);
1196         $str = $cgi->escapeHTML($str);
1197         if ($opts{'-nbsp'}) {
1198                 $str =~ s/ /&nbsp;/g;
1199         }
1200         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1201         return $str;
1202 }
1203
1204 # quote control characters and escape filename to HTML
1205 sub esc_path {
1206         my $str = shift;
1207         my %opts = @_;
1208
1209         return undef unless defined $str;
1210
1211         $str = to_utf8($str);
1212         $str = $cgi->escapeHTML($str);
1213         if ($opts{'-nbsp'}) {
1214                 $str =~ s/ /&nbsp;/g;
1215         }
1216         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1217         return $str;
1218 }
1219
1220 # Make control characters "printable", using character escape codes (CEC)
1221 sub quot_cec {
1222         my $cntrl = shift;
1223         my %opts = @_;
1224         my %es = ( # character escape codes, aka escape sequences
1225                 "\t" => '\t',   # tab            (HT)
1226                 "\n" => '\n',   # line feed      (LF)
1227                 "\r" => '\r',   # carrige return (CR)
1228                 "\f" => '\f',   # form feed      (FF)
1229                 "\b" => '\b',   # backspace      (BS)
1230                 "\a" => '\a',   # alarm (bell)   (BEL)
1231                 "\e" => '\e',   # escape         (ESC)
1232                 "\013" => '\v', # vertical tab   (VT)
1233                 "\000" => '\0', # nul character  (NUL)
1234         );
1235         my $chr = ( (exists $es{$cntrl})
1236                     ? $es{$cntrl}
1237                     : sprintf('\%2x', ord($cntrl)) );
1238         if ($opts{-nohtml}) {
1239                 return $chr;
1240         } else {
1241                 return "<span class=\"cntrl\">$chr</span>";
1242         }
1243 }
1244
1245 # Alternatively use unicode control pictures codepoints,
1246 # Unicode "printable representation" (PR)
1247 sub quot_upr {
1248         my $cntrl = shift;
1249         my %opts = @_;
1250
1251         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1252         if ($opts{-nohtml}) {
1253                 return $chr;
1254         } else {
1255                 return "<span class=\"cntrl\">$chr</span>";
1256         }
1257 }
1258
1259 # git may return quoted and escaped filenames
1260 sub unquote {
1261         my $str = shift;
1262
1263         sub unq {
1264                 my $seq = shift;
1265                 my %es = ( # character escape codes, aka escape sequences
1266                         't' => "\t",   # tab            (HT, TAB)
1267                         'n' => "\n",   # newline        (NL)
1268                         'r' => "\r",   # return         (CR)
1269                         'f' => "\f",   # form feed      (FF)
1270                         'b' => "\b",   # backspace      (BS)
1271                         'a' => "\a",   # alarm (bell)   (BEL)
1272                         'e' => "\e",   # escape         (ESC)
1273                         'v' => "\013", # vertical tab   (VT)
1274                 );
1275
1276                 if ($seq =~ m/^[0-7]{1,3}$/) {
1277                         # octal char sequence
1278                         return chr(oct($seq));
1279                 } elsif (exists $es{$seq}) {
1280                         # C escape sequence, aka character escape code
1281                         return $es{$seq};
1282                 }
1283                 # quoted ordinary character
1284                 return $seq;
1285         }
1286
1287         if ($str =~ m/^"(.*)"$/) {
1288                 # needs unquoting
1289                 $str = $1;
1290                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1291         }
1292         return $str;
1293 }
1294
1295 # escape tabs (convert tabs to spaces)
1296 sub untabify {
1297         my $line = shift;
1298
1299         while ((my $pos = index($line, "\t")) != -1) {
1300                 if (my $count = (8 - ($pos % 8))) {
1301                         my $spaces = ' ' x $count;
1302                         $line =~ s/\t/$spaces/;
1303                 }
1304         }
1305
1306         return $line;
1307 }
1308
1309 sub project_in_list {
1310         my $project = shift;
1311         my @list = git_get_projects_list();
1312         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1313 }
1314
1315 ## ----------------------------------------------------------------------
1316 ## HTML aware string manipulation
1317
1318 # Try to chop given string on a word boundary between position
1319 # $len and $len+$add_len. If there is no word boundary there,
1320 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1321 # (marking chopped part) would be longer than given string.
1322 sub chop_str {
1323         my $str = shift;
1324         my $len = shift;
1325         my $add_len = shift || 10;
1326         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1327
1328         # Make sure perl knows it is utf8 encoded so we don't
1329         # cut in the middle of a utf8 multibyte char.
1330         $str = to_utf8($str);
1331
1332         # allow only $len chars, but don't cut a word if it would fit in $add_len
1333         # if it doesn't fit, cut it if it's still longer than the dots we would add
1334         # remove chopped character entities entirely
1335
1336         # when chopping in the middle, distribute $len into left and right part
1337         # return early if chopping wouldn't make string shorter
1338         if ($where eq 'center') {
1339                 return $str if ($len + 5 >= length($str)); # filler is length 5
1340                 $len = int($len/2);
1341         } else {
1342                 return $str if ($len + 4 >= length($str)); # filler is length 4
1343         }
1344
1345         # regexps: ending and beginning with word part up to $add_len
1346         my $endre = qr/.{$len}\w{0,$add_len}/;
1347         my $begre = qr/\w{0,$add_len}.{$len}/;
1348
1349         if ($where eq 'left') {
1350                 $str =~ m/^(.*?)($begre)$/;
1351                 my ($lead, $body) = ($1, $2);
1352                 if (length($lead) > 4) {
1353                         $lead = " ...";
1354                 }
1355                 return "$lead$body";
1356
1357         } elsif ($where eq 'center') {
1358                 $str =~ m/^($endre)(.*)$/;
1359                 my ($left, $str)  = ($1, $2);
1360                 $str =~ m/^(.*?)($begre)$/;
1361                 my ($mid, $right) = ($1, $2);
1362                 if (length($mid) > 5) {
1363                         $mid = " ... ";
1364                 }
1365                 return "$left$mid$right";
1366
1367         } else {
1368                 $str =~ m/^($endre)(.*)$/;
1369                 my $body = $1;
1370                 my $tail = $2;
1371                 if (length($tail) > 4) {
1372                         $tail = "... ";
1373                 }
1374                 return "$body$tail";
1375         }
1376 }
1377
1378 # takes the same arguments as chop_str, but also wraps a <span> around the
1379 # result with a title attribute if it does get chopped. Additionally, the
1380 # string is HTML-escaped.
1381 sub chop_and_escape_str {
1382         my ($str) = @_;
1383
1384         my $chopped = chop_str(@_);
1385         if ($chopped eq $str) {
1386                 return esc_html($chopped);
1387         } else {
1388                 $str =~ s/[[:cntrl:]]/?/g;
1389                 return $cgi->span({-title=>$str}, esc_html($chopped));
1390         }
1391 }
1392
1393 ## ----------------------------------------------------------------------
1394 ## functions returning short strings
1395
1396 # CSS class for given age value (in seconds)
1397 sub age_class {
1398         my $age = shift;
1399
1400         if (!defined $age) {
1401                 return "noage";
1402         } elsif ($age < 60*60*2) {
1403                 return "age0";
1404         } elsif ($age < 60*60*24*2) {
1405                 return "age1";
1406         } else {
1407                 return "age2";
1408         }
1409 }
1410
1411 # convert age in seconds to "nn units ago" string
1412 sub age_string {
1413         my $age = shift;
1414         my $age_str;
1415
1416         if ($age > 60*60*24*365*2) {
1417                 $age_str = (int $age/60/60/24/365);
1418                 $age_str .= " years ago";
1419         } elsif ($age > 60*60*24*(365/12)*2) {
1420                 $age_str = int $age/60/60/24/(365/12);
1421                 $age_str .= " months ago";
1422         } elsif ($age > 60*60*24*7*2) {
1423                 $age_str = int $age/60/60/24/7;
1424                 $age_str .= " weeks ago";
1425         } elsif ($age > 60*60*24*2) {
1426                 $age_str = int $age/60/60/24;
1427                 $age_str .= " days ago";
1428         } elsif ($age > 60*60*2) {
1429                 $age_str = int $age/60/60;
1430                 $age_str .= " hours ago";
1431         } elsif ($age > 60*2) {
1432                 $age_str = int $age/60;
1433                 $age_str .= " min ago";
1434         } elsif ($age > 2) {
1435                 $age_str = int $age;
1436                 $age_str .= " sec ago";
1437         } else {
1438                 $age_str .= " right now";
1439         }
1440         return $age_str;
1441 }
1442
1443 use constant {
1444         S_IFINVALID => 0030000,
1445         S_IFGITLINK => 0160000,
1446 };
1447
1448 # submodule/subproject, a commit object reference
1449 sub S_ISGITLINK {
1450         my $mode = shift;
1451
1452         return (($mode & S_IFMT) == S_IFGITLINK)
1453 }
1454
1455 # convert file mode in octal to symbolic file mode string
1456 sub mode_str {
1457         my $mode = oct shift;
1458
1459         if (S_ISGITLINK($mode)) {
1460                 return 'm---------';
1461         } elsif (S_ISDIR($mode & S_IFMT)) {
1462                 return 'drwxr-xr-x';
1463         } elsif (S_ISLNK($mode)) {
1464                 return 'lrwxrwxrwx';
1465         } elsif (S_ISREG($mode)) {
1466                 # git cares only about the executable bit
1467                 if ($mode & S_IXUSR) {
1468                         return '-rwxr-xr-x';
1469                 } else {
1470                         return '-rw-r--r--';
1471                 };
1472         } else {
1473                 return '----------';
1474         }
1475 }
1476
1477 # convert file mode in octal to file type string
1478 sub file_type {
1479         my $mode = shift;
1480
1481         if ($mode !~ m/^[0-7]+$/) {
1482                 return $mode;
1483         } else {
1484                 $mode = oct $mode;
1485         }
1486
1487         if (S_ISGITLINK($mode)) {
1488                 return "submodule";
1489         } elsif (S_ISDIR($mode & S_IFMT)) {
1490                 return "directory";
1491         } elsif (S_ISLNK($mode)) {
1492                 return "symlink";
1493         } elsif (S_ISREG($mode)) {
1494                 return "file";
1495         } else {
1496                 return "unknown";
1497         }
1498 }
1499
1500 # convert file mode in octal to file type description string
1501 sub file_type_long {
1502         my $mode = shift;
1503
1504         if ($mode !~ m/^[0-7]+$/) {
1505                 return $mode;
1506         } else {
1507                 $mode = oct $mode;
1508         }
1509
1510         if (S_ISGITLINK($mode)) {
1511                 return "submodule";
1512         } elsif (S_ISDIR($mode & S_IFMT)) {
1513                 return "directory";
1514         } elsif (S_ISLNK($mode)) {
1515                 return "symlink";
1516         } elsif (S_ISREG($mode)) {
1517                 if ($mode & S_IXUSR) {
1518                         return "executable";
1519                 } else {
1520                         return "file";
1521                 };
1522         } else {
1523                 return "unknown";
1524         }
1525 }
1526
1527
1528 ## ----------------------------------------------------------------------
1529 ## functions returning short HTML fragments, or transforming HTML fragments
1530 ## which don't belong to other sections
1531
1532 # format line of commit message.
1533 sub format_log_line_html {
1534         my $line = shift;
1535
1536         $line = esc_html($line, -nbsp=>1);
1537         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1538                 $cgi->a({-href => href(action=>"object", hash=>$1),
1539                                         -class => "text"}, $1);
1540         }eg;
1541
1542         return $line;
1543 }
1544
1545 # format marker of refs pointing to given object
1546
1547 # the destination action is chosen based on object type and current context:
1548 # - for annotated tags, we choose the tag view unless it's the current view
1549 #   already, in which case we go to shortlog view
1550 # - for other refs, we keep the current view if we're in history, shortlog or
1551 #   log view, and select shortlog otherwise
1552 sub format_ref_marker {
1553         my ($refs, $id) = @_;
1554         my $markers = '';
1555
1556         if (defined $refs->{$id}) {
1557                 foreach my $ref (@{$refs->{$id}}) {
1558                         # this code exploits the fact that non-lightweight tags are the
1559                         # only indirect objects, and that they are the only objects for which
1560                         # we want to use tag instead of shortlog as action
1561                         my ($type, $name) = qw();
1562                         my $indirect = ($ref =~ s/\^\{\}$//);
1563                         # e.g. tags/v2.6.11 or heads/next
1564                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1565                                 $type = $1;
1566                                 $name = $2;
1567                         } else {
1568                                 $type = "ref";
1569                                 $name = $ref;
1570                         }
1571
1572                         my $class = $type;
1573                         $class .= " indirect" if $indirect;
1574
1575                         my $dest_action = "shortlog";
1576
1577                         if ($indirect) {
1578                                 $dest_action = "tag" unless $action eq "tag";
1579                         } elsif ($action =~ /^(history|(short)?log)$/) {
1580                                 $dest_action = $action;
1581                         }
1582
1583                         my $dest = "";
1584                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1585                         $dest .= $ref;
1586
1587                         my $link = $cgi->a({
1588                                 -href => href(
1589                                         action=>$dest_action,
1590                                         hash=>$dest
1591                                 )}, $name);
1592
1593                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
1594                                 $link . "</span>";
1595                 }
1596         }
1597
1598         if ($markers) {
1599                 return ' <span class="refs">'. $markers . '</span>';
1600         } else {
1601                 return "";
1602         }
1603 }
1604
1605 # format, perhaps shortened and with markers, title line
1606 sub format_subject_html {
1607         my ($long, $short, $href, $extra) = @_;
1608         $extra = '' unless defined($extra);
1609
1610         if (length($short) < length($long)) {
1611                 $long =~ s/[[:cntrl:]]/?/g;
1612                 return $cgi->a({-href => $href, -class => "list subject",
1613                                 -title => to_utf8($long)},
1614                        esc_html($short)) . $extra;
1615         } else {
1616                 return $cgi->a({-href => $href, -class => "list subject"},
1617                        esc_html($long)) . $extra;
1618         }
1619 }
1620
1621 # Rather than recomputing the url for an email multiple times, we cache it
1622 # after the first hit. This gives a visible benefit in views where the avatar
1623 # for the same email is used repeatedly (e.g. shortlog).
1624 # The cache is shared by all avatar engines (currently gravatar only), which
1625 # are free to use it as preferred. Since only one avatar engine is used for any
1626 # given page, there's no risk for cache conflicts.
1627 our %avatar_cache = ();
1628
1629 # Compute the picon url for a given email, by using the picon search service over at
1630 # http://www.cs.indiana.edu/picons/search.html
1631 sub picon_url {
1632         my $email = lc shift;
1633         if (!$avatar_cache{$email}) {
1634                 my ($user, $domain) = split('@', $email);
1635                 $avatar_cache{$email} =
1636                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1637                         "$domain/$user/" .
1638                         "users+domains+unknown/up/single";
1639         }
1640         return $avatar_cache{$email};
1641 }
1642
1643 # Compute the gravatar url for a given email, if it's not in the cache already.
1644 # Gravatar stores only the part of the URL before the size, since that's the
1645 # one computationally more expensive. This also allows reuse of the cache for
1646 # different sizes (for this particular engine).
1647 sub gravatar_url {
1648         my $email = lc shift;
1649         my $size = shift;
1650         $avatar_cache{$email} ||=
1651                 "http://www.gravatar.com/avatar/" .
1652                         Digest::MD5::md5_hex($email) . "?s=";
1653         return $avatar_cache{$email} . $size;
1654 }
1655
1656 # Insert an avatar for the given $email at the given $size if the feature
1657 # is enabled.
1658 sub git_get_avatar {
1659         my ($email, %opts) = @_;
1660         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1661         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1662         $opts{-size} ||= 'default';
1663         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1664         my $url = "";
1665         if ($git_avatar eq 'gravatar') {
1666                 $url = gravatar_url($email, $size);
1667         } elsif ($git_avatar eq 'picon') {
1668                 $url = picon_url($email);
1669         }
1670         # Other providers can be added by extending the if chain, defining $url
1671         # as needed. If no variant puts something in $url, we assume avatars
1672         # are completely disabled/unavailable.
1673         if ($url) {
1674                 return $pre_white .
1675                        "<img width=\"$size\" " .
1676                             "class=\"avatar\" " .
1677                             "src=\"".esc_url($url)."\" " .
1678                             "alt=\"\" " .
1679                        "/>" . $post_white;
1680         } else {
1681                 return "";
1682         }
1683 }
1684
1685 sub format_search_author {
1686         my ($author, $searchtype, $displaytext) = @_;
1687         my $have_search = gitweb_check_feature('search');
1688
1689         if ($have_search) {
1690                 my $performed = "";
1691                 if ($searchtype eq 'author') {
1692                         $performed = "authored";
1693                 } elsif ($searchtype eq 'committer') {
1694                         $performed = "committed";
1695                 }
1696
1697                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1698                                 searchtext=>$author,
1699                                 searchtype=>$searchtype), class=>"list",
1700                                 title=>"Search for commits $performed by $author"},
1701                                 $displaytext);
1702
1703         } else {
1704                 return $displaytext;
1705         }
1706 }
1707
1708 # format the author name of the given commit with the given tag
1709 # the author name is chopped and escaped according to the other
1710 # optional parameters (see chop_str).
1711 sub format_author_html {
1712         my $tag = shift;
1713         my $co = shift;
1714         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1715         return "<$tag class=\"author\">" .
1716                format_search_author($co->{'author_name'}, "author",
1717                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1718                        $author) .
1719                "</$tag>";
1720 }
1721
1722 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1723 sub format_git_diff_header_line {
1724         my $line = shift;
1725         my $diffinfo = shift;
1726         my ($from, $to) = @_;
1727
1728         if ($diffinfo->{'nparents'}) {
1729                 # combined diff
1730                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1731                 if ($to->{'href'}) {
1732                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1733                                          esc_path($to->{'file'}));
1734                 } else { # file was deleted (no href)
1735                         $line .= esc_path($to->{'file'});
1736                 }
1737         } else {
1738                 # "ordinary" diff
1739                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1740                 if ($from->{'href'}) {
1741                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1742                                          'a/' . esc_path($from->{'file'}));
1743                 } else { # file was added (no href)
1744                         $line .= 'a/' . esc_path($from->{'file'});
1745                 }
1746                 $line .= ' ';
1747                 if ($to->{'href'}) {
1748                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1749                                          'b/' . esc_path($to->{'file'}));
1750                 } else { # file was deleted
1751                         $line .= 'b/' . esc_path($to->{'file'});
1752                 }
1753         }
1754
1755         return "<div class=\"diff header\">$line</div>\n";
1756 }
1757
1758 # format extended diff header line, before patch itself
1759 sub format_extended_diff_header_line {
1760         my $line = shift;
1761         my $diffinfo = shift;
1762         my ($from, $to) = @_;
1763
1764         # match <path>
1765         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1766                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1767                                        esc_path($from->{'file'}));
1768         }
1769         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1770                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1771                                  esc_path($to->{'file'}));
1772         }
1773         # match single <mode>
1774         if ($line =~ m/\s(\d{6})$/) {
1775                 $line .= '<span class="info"> (' .
1776                          file_type_long($1) .
1777                          ')</span>';
1778         }
1779         # match <hash>
1780         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1781                 # can match only for combined diff
1782                 $line = 'index ';
1783                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1784                         if ($from->{'href'}[$i]) {
1785                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1786                                                   -class=>"hash"},
1787                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1788                         } else {
1789                                 $line .= '0' x 7;
1790                         }
1791                         # separator
1792                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1793                 }
1794                 $line .= '..';
1795                 if ($to->{'href'}) {
1796                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1797                                          substr($diffinfo->{'to_id'},0,7));
1798                 } else {
1799                         $line .= '0' x 7;
1800                 }
1801
1802         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1803                 # can match only for ordinary diff
1804                 my ($from_link, $to_link);
1805                 if ($from->{'href'}) {
1806                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1807                                              substr($diffinfo->{'from_id'},0,7));
1808                 } else {
1809                         $from_link = '0' x 7;
1810                 }
1811                 if ($to->{'href'}) {
1812                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1813                                            substr($diffinfo->{'to_id'},0,7));
1814                 } else {
1815                         $to_link = '0' x 7;
1816                 }
1817                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1818                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1819         }
1820
1821         return $line . "<br/>\n";
1822 }
1823
1824 # format from-file/to-file diff header
1825 sub format_diff_from_to_header {
1826         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1827         my $line;
1828         my $result = '';
1829
1830         $line = $from_line;
1831         #assert($line =~ m/^---/) if DEBUG;
1832         # no extra formatting for "^--- /dev/null"
1833         if (! $diffinfo->{'nparents'}) {
1834                 # ordinary (single parent) diff
1835                 if ($line =~ m!^--- "?a/!) {
1836                         if ($from->{'href'}) {
1837                                 $line = '--- a/' .
1838                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1839                                                 esc_path($from->{'file'}));
1840                         } else {
1841                                 $line = '--- a/' .
1842                                         esc_path($from->{'file'});
1843                         }
1844                 }
1845                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1846
1847         } else {
1848                 # combined diff (merge commit)
1849                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1850                         if ($from->{'href'}[$i]) {
1851                                 $line = '--- ' .
1852                                         $cgi->a({-href=>href(action=>"blobdiff",
1853                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1854                                                              hash_parent_base=>$parents[$i],
1855                                                              file_parent=>$from->{'file'}[$i],
1856                                                              hash=>$diffinfo->{'to_id'},
1857                                                              hash_base=>$hash,
1858                                                              file_name=>$to->{'file'}),
1859                                                  -class=>"path",
1860                                                  -title=>"diff" . ($i+1)},
1861                                                 $i+1) .
1862                                         '/' .
1863                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1864                                                 esc_path($from->{'file'}[$i]));
1865                         } else {
1866                                 $line = '--- /dev/null';
1867                         }
1868                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1869                 }
1870         }
1871
1872         $line = $to_line;
1873         #assert($line =~ m/^\+\+\+/) if DEBUG;
1874         # no extra formatting for "^+++ /dev/null"
1875         if ($line =~ m!^\+\+\+ "?b/!) {
1876                 if ($to->{'href'}) {
1877                         $line = '+++ b/' .
1878                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1879                                         esc_path($to->{'file'}));
1880                 } else {
1881                         $line = '+++ b/' .
1882                                 esc_path($to->{'file'});
1883                 }
1884         }
1885         $result .= qq!<div class="diff to_file">$line</div>\n!;
1886
1887         return $result;
1888 }
1889
1890 # create note for patch simplified by combined diff
1891 sub format_diff_cc_simplified {
1892         my ($diffinfo, @parents) = @_;
1893         my $result = '';
1894
1895         $result .= "<div class=\"diff header\">" .
1896                    "diff --cc ";
1897         if (!is_deleted($diffinfo)) {
1898                 $result .= $cgi->a({-href => href(action=>"blob",
1899                                                   hash_base=>$hash,
1900                                                   hash=>$diffinfo->{'to_id'},
1901                                                   file_name=>$diffinfo->{'to_file'}),
1902                                     -class => "path"},
1903                                    esc_path($diffinfo->{'to_file'}));
1904         } else {
1905                 $result .= esc_path($diffinfo->{'to_file'});
1906         }
1907         $result .= "</div>\n" . # class="diff header"
1908                    "<div class=\"diff nodifferences\">" .
1909                    "Simple merge" .
1910                    "</div>\n"; # class="diff nodifferences"
1911
1912         return $result;
1913 }
1914
1915 # format patch (diff) line (not to be used for diff headers)
1916 sub format_diff_line {
1917         my $line = shift;
1918         my ($from, $to) = @_;
1919         my $diff_class = "";
1920
1921         chomp $line;
1922
1923         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1924                 # combined diff
1925                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1926                 if ($line =~ m/^\@{3}/) {
1927                         $diff_class = " chunk_header";
1928                 } elsif ($line =~ m/^\\/) {
1929                         $diff_class = " incomplete";
1930                 } elsif ($prefix =~ tr/+/+/) {
1931                         $diff_class = " add";
1932                 } elsif ($prefix =~ tr/-/-/) {
1933                         $diff_class = " rem";
1934                 }
1935         } else {
1936                 # assume ordinary diff
1937                 my $char = substr($line, 0, 1);
1938                 if ($char eq '+') {
1939                         $diff_class = " add";
1940                 } elsif ($char eq '-') {
1941                         $diff_class = " rem";
1942                 } elsif ($char eq '@') {
1943                         $diff_class = " chunk_header";
1944                 } elsif ($char eq "\\") {
1945                         $diff_class = " incomplete";
1946                 }
1947         }
1948         $line = untabify($line);
1949         if ($from && $to && $line =~ m/^\@{2} /) {
1950                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1951                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1952
1953                 $from_lines = 0 unless defined $from_lines;
1954                 $to_lines   = 0 unless defined $to_lines;
1955
1956                 if ($from->{'href'}) {
1957                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1958                                              -class=>"list"}, $from_text);
1959                 }
1960                 if ($to->{'href'}) {
1961                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1962                                              -class=>"list"}, $to_text);
1963                 }
1964                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1965                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1966                 return "<div class=\"diff$diff_class\">$line</div>\n";
1967         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1968                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1969                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1970
1971                 @from_text = split(' ', $ranges);
1972                 for (my $i = 0; $i < @from_text; ++$i) {
1973                         ($from_start[$i], $from_nlines[$i]) =
1974                                 (split(',', substr($from_text[$i], 1)), 0);
1975                 }
1976
1977                 $to_text   = pop @from_text;
1978                 $to_start  = pop @from_start;
1979                 $to_nlines = pop @from_nlines;
1980
1981                 $line = "<span class=\"chunk_info\">$prefix ";
1982                 for (my $i = 0; $i < @from_text; ++$i) {
1983                         if ($from->{'href'}[$i]) {
1984                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1985                                                   -class=>"list"}, $from_text[$i]);
1986                         } else {
1987                                 $line .= $from_text[$i];
1988                         }
1989                         $line .= " ";
1990                 }
1991                 if ($to->{'href'}) {
1992                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1993                                           -class=>"list"}, $to_text);
1994                 } else {
1995                         $line .= $to_text;
1996                 }
1997                 $line .= " $prefix</span>" .
1998                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1999                 return "<div class=\"diff$diff_class\">$line</div>\n";
2000         }
2001         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2002 }
2003
2004 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2005 # linked.  Pass the hash of the tree/commit to snapshot.
2006 sub format_snapshot_links {
2007         my ($hash) = @_;
2008         my $num_fmts = @snapshot_fmts;
2009         if ($num_fmts > 1) {
2010                 # A parenthesized list of links bearing format names.
2011                 # e.g. "snapshot (_tar.gz_ _zip_)"
2012                 return "snapshot (" . join(' ', map
2013                         $cgi->a({
2014                                 -href => href(
2015                                         action=>"snapshot",
2016                                         hash=>$hash,
2017                                         snapshot_format=>$_
2018                                 )
2019                         }, $known_snapshot_formats{$_}{'display'})
2020                 , @snapshot_fmts) . ")";
2021         } elsif ($num_fmts == 1) {
2022                 # A single "snapshot" link whose tooltip bears the format name.
2023                 # i.e. "_snapshot_"
2024                 my ($fmt) = @snapshot_fmts;
2025                 return
2026                         $cgi->a({
2027                                 -href => href(
2028                                         action=>"snapshot",
2029                                         hash=>$hash,
2030                                         snapshot_format=>$fmt
2031                                 ),
2032                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2033                         }, "snapshot");
2034         } else { # $num_fmts == 0
2035                 return undef;
2036         }
2037 }
2038
2039 ## ......................................................................
2040 ## functions returning values to be passed, perhaps after some
2041 ## transformation, to other functions; e.g. returning arguments to href()
2042
2043 # returns hash to be passed to href to generate gitweb URL
2044 # in -title key it returns description of link
2045 sub get_feed_info {
2046         my $format = shift || 'Atom';
2047         my %res = (action => lc($format));
2048
2049         # feed links are possible only for project views
2050         return unless (defined $project);
2051         # some views should link to OPML, or to generic project feed,
2052         # or don't have specific feed yet (so they should use generic)
2053         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2054
2055         my $branch;
2056         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2057         # from tag links; this also makes possible to detect branch links
2058         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2059             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2060                 $branch = $1;
2061         }
2062         # find log type for feed description (title)
2063         my $type = 'log';
2064         if (defined $file_name) {
2065                 $type  = "history of $file_name";
2066                 $type .= "/" if ($action eq 'tree');
2067                 $type .= " on '$branch'" if (defined $branch);
2068         } else {
2069                 $type = "log of $branch" if (defined $branch);
2070         }
2071
2072         $res{-title} = $type;
2073         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2074         $res{'file_name'} = $file_name;
2075
2076         return %res;
2077 }
2078
2079 ## ----------------------------------------------------------------------
2080 ## git utility subroutines, invoking git commands
2081
2082 # returns path to the core git executable and the --git-dir parameter as list
2083 sub git_cmd {
2084         $number_of_git_cmds++;
2085         return $GIT, '--git-dir='.$git_dir;
2086 }
2087
2088 # quote the given arguments for passing them to the shell
2089 # quote_command("command", "arg 1", "arg with ' and ! characters")
2090 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2091 # Try to avoid using this function wherever possible.
2092 sub quote_command {
2093         return join(' ',
2094                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2095 }
2096
2097 # get HEAD ref of given project as hash
2098 sub git_get_head_hash {
2099         return git_get_full_hash(shift, 'HEAD');
2100 }
2101
2102 sub git_get_full_hash {
2103         return git_get_hash(@_);
2104 }
2105
2106 sub git_get_short_hash {
2107         return git_get_hash(@_, '--short=7');
2108 }
2109
2110 sub git_get_hash {
2111         my ($project, $hash, @options) = @_;
2112         my $o_git_dir = $git_dir;
2113         my $retval = undef;
2114         $git_dir = "$projectroot/$project";
2115         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2116             '--verify', '-q', @options, $hash) {
2117                 $retval = <$fd>;
2118                 chomp $retval if defined $retval;
2119                 close $fd;
2120         }
2121         if (defined $o_git_dir) {
2122                 $git_dir = $o_git_dir;
2123         }
2124         return $retval;
2125 }
2126
2127 # get type of given object
2128 sub git_get_type {
2129         my $hash = shift;
2130
2131         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2132         my $type = <$fd>;
2133         close $fd or return;
2134         chomp $type;
2135         return $type;
2136 }
2137
2138 # repository configuration
2139 our $config_file = '';
2140 our %config;
2141
2142 # store multiple values for single key as anonymous array reference
2143 # single values stored directly in the hash, not as [ <value> ]
2144 sub hash_set_multi {
2145         my ($hash, $key, $value) = @_;
2146
2147         if (!exists $hash->{$key}) {
2148                 $hash->{$key} = $value;
2149         } elsif (!ref $hash->{$key}) {
2150                 $hash->{$key} = [ $hash->{$key}, $value ];
2151         } else {
2152                 push @{$hash->{$key}}, $value;
2153         }
2154 }
2155
2156 # return hash of git project configuration
2157 # optionally limited to some section, e.g. 'gitweb'
2158 sub git_parse_project_config {
2159         my $section_regexp = shift;
2160         my %config;
2161
2162         local $/ = "\0";
2163
2164         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2165                 or return;
2166
2167         while (my $keyval = <$fh>) {
2168                 chomp $keyval;
2169                 my ($key, $value) = split(/\n/, $keyval, 2);
2170
2171                 hash_set_multi(\%config, $key, $value)
2172                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2173         }
2174         close $fh;
2175
2176         return %config;
2177 }
2178
2179 # convert config value to boolean: 'true' or 'false'
2180 # no value, number > 0, 'true' and 'yes' values are true
2181 # rest of values are treated as false (never as error)
2182 sub config_to_bool {
2183         my $val = shift;
2184
2185         return 1 if !defined $val;             # section.key
2186
2187         # strip leading and trailing whitespace
2188         $val =~ s/^\s+//;
2189         $val =~ s/\s+$//;
2190
2191         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2192                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2193 }
2194
2195 # convert config value to simple decimal number
2196 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2197 # to be multiplied by 1024, 1048576, or 1073741824
2198 sub config_to_int {
2199         my $val = shift;
2200
2201         # strip leading and trailing whitespace
2202         $val =~ s/^\s+//;
2203         $val =~ s/\s+$//;
2204
2205         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2206                 $unit = lc($unit);
2207                 # unknown unit is treated as 1
2208                 return $num * ($unit eq 'g' ? 1073741824 :
2209                                $unit eq 'm' ?    1048576 :
2210                                $unit eq 'k' ?       1024 : 1);
2211         }
2212         return $val;
2213 }
2214
2215 # convert config value to array reference, if needed
2216 sub config_to_multi {
2217         my $val = shift;
2218
2219         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2220 }
2221
2222 sub git_get_project_config {
2223         my ($key, $type) = @_;
2224
2225         return unless defined $git_dir;
2226
2227         # key sanity check
2228         return unless ($key);
2229         $key =~ s/^gitweb\.//;
2230         return if ($key =~ m/\W/);
2231
2232         # type sanity check
2233         if (defined $type) {
2234                 $type =~ s/^--//;
2235                 $type = undef
2236                         unless ($type eq 'bool' || $type eq 'int');
2237         }
2238
2239         # get config
2240         if (!defined $config_file ||
2241             $config_file ne "$git_dir/config") {
2242                 %config = git_parse_project_config('gitweb');
2243                 $config_file = "$git_dir/config";
2244         }
2245
2246         # check if config variable (key) exists
2247         return unless exists $config{"gitweb.$key"};
2248
2249         # ensure given type
2250         if (!defined $type) {
2251                 return $config{"gitweb.$key"};
2252         } elsif ($type eq 'bool') {
2253                 # backward compatibility: 'git config --bool' returns true/false
2254                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2255         } elsif ($type eq 'int') {
2256                 return config_to_int($config{"gitweb.$key"});
2257         }
2258         return $config{"gitweb.$key"};
2259 }
2260
2261 # get hash of given path at given ref
2262 sub git_get_hash_by_path {
2263         my $base = shift;
2264         my $path = shift || return undef;
2265         my $type = shift;
2266
2267         $path =~ s,/+$,,;
2268
2269         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2270                 or die_error(500, "Open git-ls-tree failed");
2271         my $line = <$fd>;
2272         close $fd or return undef;
2273
2274         if (!defined $line) {
2275                 # there is no tree or hash given by $path at $base
2276                 return undef;
2277         }
2278
2279         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2280         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2281         if (defined $type && $type ne $2) {
2282                 # type doesn't match
2283                 return undef;
2284         }
2285         return $3;
2286 }
2287
2288 # get path of entry with given hash at given tree-ish (ref)
2289 # used to get 'from' filename for combined diff (merge commit) for renames
2290 sub git_get_path_by_hash {
2291         my $base = shift || return;
2292         my $hash = shift || return;
2293
2294         local $/ = "\0";
2295
2296         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2297                 or return undef;
2298         while (my $line = <$fd>) {
2299                 chomp $line;
2300
2301                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2302                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2303                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2304                         close $fd;
2305                         return $1;
2306                 }
2307         }
2308         close $fd;
2309         return undef;
2310 }
2311
2312 ## ......................................................................
2313 ## git utility functions, directly accessing git repository
2314
2315 sub git_get_project_description {
2316         my $path = shift;
2317
2318         $git_dir = "$projectroot/$path";
2319         open my $fd, '<', "$git_dir/description"
2320                 or return git_get_project_config('description');
2321         my $descr = <$fd>;
2322         close $fd;
2323         if (defined $descr) {
2324                 chomp $descr;
2325         }
2326         return $descr;
2327 }
2328
2329 sub git_get_project_ctags {
2330         my $path = shift;
2331         my $ctags = {};
2332
2333         $git_dir = "$projectroot/$path";
2334         opendir my $dh, "$git_dir/ctags"
2335                 or return $ctags;
2336         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2337                 open my $ct, '<', $_ or next;
2338                 my $val = <$ct>;
2339                 chomp $val;
2340                 close $ct;
2341                 my $ctag = $_; $ctag =~ s#.*/##;
2342                 $ctags->{$ctag} = $val;
2343         }
2344         closedir $dh;
2345         $ctags;
2346 }
2347
2348 sub git_populate_project_tagcloud {
2349         my $ctags = shift;
2350
2351         # First, merge different-cased tags; tags vote on casing
2352         my %ctags_lc;
2353         foreach (keys %$ctags) {
2354                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2355                 if (not $ctags_lc{lc $_}->{topcount}
2356                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2357                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2358                         $ctags_lc{lc $_}->{topname} = $_;
2359                 }
2360         }
2361
2362         my $cloud;
2363         if (eval { require HTML::TagCloud; 1; }) {
2364                 $cloud = HTML::TagCloud->new;
2365                 foreach (sort keys %ctags_lc) {
2366                         # Pad the title with spaces so that the cloud looks
2367                         # less crammed.
2368                         my $title = $ctags_lc{$_}->{topname};
2369                         $title =~ s/ /&nbsp;/g;
2370                         $title =~ s/^/&nbsp;/g;
2371                         $title =~ s/$/&nbsp;/g;
2372                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2373                 }
2374         } else {
2375                 $cloud = \%ctags_lc;
2376         }
2377         $cloud;
2378 }
2379
2380 sub git_show_project_tagcloud {
2381         my ($cloud, $count) = @_;
2382         print STDERR ref($cloud)."..\n";
2383         if (ref $cloud eq 'HTML::TagCloud') {
2384                 return $cloud->html_and_css($count);
2385         } else {
2386                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2387                 return '<p align="center">' . join (', ', map {
2388                         $cgi->a({-href=>"$home_link?by_tag=$_"}, $cloud->{$_}->{topname})
2389                 } splice(@tags, 0, $count)) . '</p>';
2390         }
2391 }
2392
2393 sub git_get_project_url_list {
2394         my $path = shift;
2395
2396         $git_dir = "$projectroot/$path";
2397         open my $fd, '<', "$git_dir/cloneurl"
2398                 or return wantarray ?
2399                 @{ config_to_multi(git_get_project_config('url')) } :
2400                    config_to_multi(git_get_project_config('url'));
2401         my @git_project_url_list = map { chomp; $_ } <$fd>;
2402         close $fd;
2403
2404         return wantarray ? @git_project_url_list : \@git_project_url_list;
2405 }
2406
2407 sub git_get_projects_list {
2408         my ($filter) = @_;
2409         my @list;
2410
2411         $filter ||= '';
2412         $filter =~ s/\.git$//;
2413
2414         my $check_forks = gitweb_check_feature('forks');
2415
2416         if (-d $projects_list) {
2417                 # search in directory
2418                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2419                 # remove the trailing "/"
2420                 $dir =~ s!/+$!!;
2421                 my $pfxlen = length("$dir");
2422                 my $pfxdepth = ($dir =~ tr!/!!);
2423
2424                 File::Find::find({
2425                         follow_fast => 1, # follow symbolic links
2426                         follow_skip => 2, # ignore duplicates
2427                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2428                         wanted => sub {
2429                                 # skip project-list toplevel, if we get it.
2430                                 return if (m!^[/.]$!);
2431                                 # only directories can be git repositories
2432                                 return unless (-d $_);
2433                                 # don't traverse too deep (Find is super slow on os x)
2434                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2435                                         $File::Find::prune = 1;
2436                                         return;
2437                                 }
2438
2439                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2440                                 # we check related file in $projectroot
2441                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2442                                 if (check_export_ok("$projectroot/$path")) {
2443                                         push @list, { path => $path };
2444                                         $File::Find::prune = 1;
2445                                 }
2446                         },
2447                 }, "$dir");
2448
2449         } elsif (-f $projects_list) {
2450                 # read from file(url-encoded):
2451                 # 'git%2Fgit.git Linus+Torvalds'
2452                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2453                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2454                 my %paths;
2455                 open my $fd, '<', $projects_list or return;
2456         PROJECT:
2457                 while (my $line = <$fd>) {
2458                         chomp $line;
2459                         my ($path, $owner) = split ' ', $line;
2460                         $path = unescape($path);
2461                         $owner = unescape($owner);
2462                         if (!defined $path) {
2463                                 next;
2464                         }
2465                         if ($filter ne '') {
2466                                 # looking for forks;
2467                                 my $pfx = substr($path, 0, length($filter));
2468                                 if ($pfx ne $filter) {
2469                                         next PROJECT;
2470                                 }
2471                                 my $sfx = substr($path, length($filter));
2472                                 if ($sfx !~ /^\/.*\.git$/) {
2473                                         next PROJECT;
2474                                 }
2475                         } elsif ($check_forks) {
2476                         PATH:
2477                                 foreach my $filter (keys %paths) {
2478                                         # looking for forks;
2479                                         my $pfx = substr($path, 0, length($filter));
2480                                         if ($pfx ne $filter) {
2481                                                 next PATH;
2482                                         }
2483                                         my $sfx = substr($path, length($filter));
2484                                         if ($sfx !~ /^\/.*\.git$/) {
2485                                                 next PATH;
2486                                         }
2487                                         # is a fork, don't include it in
2488                                         # the list
2489                                         next PROJECT;
2490                                 }
2491                         }
2492                         if (check_export_ok("$projectroot/$path")) {
2493                                 my $pr = {
2494                                         path => $path,
2495                                         owner => to_utf8($owner),
2496                                 };
2497                                 push @list, $pr;
2498                                 (my $forks_path = $path) =~ s/\.git$//;
2499                                 $paths{$forks_path}++;
2500                         }
2501                 }
2502                 close $fd;
2503         }
2504         return @list;
2505 }
2506
2507 our $gitweb_project_owner = undef;
2508 sub git_get_project_list_from_file {
2509
2510         return if (defined $gitweb_project_owner);
2511
2512         $gitweb_project_owner = {};
2513         # read from file (url-encoded):
2514         # 'git%2Fgit.git Linus+Torvalds'
2515         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2516         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2517         if (-f $projects_list) {
2518                 open(my $fd, '<', $projects_list);
2519                 while (my $line = <$fd>) {
2520                         chomp $line;
2521                         my ($pr, $ow) = split ' ', $line;
2522                         $pr = unescape($pr);
2523                         $ow = unescape($ow);
2524                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2525                 }
2526                 close $fd;
2527         }
2528 }
2529
2530 sub git_get_project_owner {
2531         my $project = shift;
2532         my $owner;
2533
2534         return undef unless $project;
2535         $git_dir = "$projectroot/$project";
2536
2537         if (!defined $gitweb_project_owner) {
2538                 git_get_project_list_from_file();
2539         }
2540
2541         if (exists $gitweb_project_owner->{$project}) {
2542                 $owner = $gitweb_project_owner->{$project};
2543         }
2544         if (!defined $owner){
2545                 $owner = git_get_project_config('owner');
2546         }
2547         if (!defined $owner) {
2548                 $owner = get_file_owner("$git_dir");
2549         }
2550
2551         return $owner;
2552 }
2553
2554 sub git_get_last_activity {
2555         my ($path) = @_;
2556         my $fd;
2557
2558         $git_dir = "$projectroot/$path";
2559         open($fd, "-|", git_cmd(), 'for-each-ref',
2560              '--format=%(committer)',
2561              '--sort=-committerdate',
2562              '--count=1',
2563              'refs/heads') or return;
2564         my $most_recent = <$fd>;
2565         close $fd or return;
2566         if (defined $most_recent &&
2567             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2568                 my $timestamp = $1;
2569                 my $age = time - $timestamp;
2570                 return ($age, age_string($age));
2571         }
2572         return (undef, undef);
2573 }
2574
2575 sub git_get_references {
2576         my $type = shift || "";
2577         my %refs;
2578         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2579         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2580         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2581                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2582                 or return;
2583
2584         while (my $line = <$fd>) {
2585                 chomp $line;
2586                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2587                         if (defined $refs{$1}) {
2588                                 push @{$refs{$1}}, $2;
2589                         } else {
2590                                 $refs{$1} = [ $2 ];
2591                         }
2592                 }
2593         }
2594         close $fd or return;
2595         return \%refs;
2596 }
2597
2598 sub git_get_rev_name_tags {
2599         my $hash = shift || return undef;
2600
2601         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2602                 or return;
2603         my $name_rev = <$fd>;
2604         close $fd;
2605
2606         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2607                 return $1;
2608         } else {
2609                 # catches also '$hash undefined' output
2610                 return undef;
2611         }
2612 }
2613
2614 ## ----------------------------------------------------------------------
2615 ## parse to hash functions
2616
2617 sub parse_date {
2618         my $epoch = shift;
2619         my $tz = shift || "-0000";
2620
2621         my %date;
2622         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2623         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2624         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2625         $date{'hour'} = $hour;
2626         $date{'minute'} = $min;
2627         $date{'mday'} = $mday;
2628         $date{'day'} = $days[$wday];
2629         $date{'month'} = $months[$mon];
2630         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2631                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2632         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2633                              $mday, $months[$mon], $hour ,$min;
2634         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2635                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2636
2637         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2638         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2639         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2640         $date{'hour_local'} = $hour;
2641         $date{'minute_local'} = $min;
2642         $date{'tz_local'} = $tz;
2643         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2644                                   1900+$year, $mon+1, $mday,
2645                                   $hour, $min, $sec, $tz);
2646         return %date;
2647 }
2648
2649 sub parse_tag {
2650         my $tag_id = shift;
2651         my %tag;
2652         my @comment;
2653
2654         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2655         $tag{'id'} = $tag_id;
2656         while (my $line = <$fd>) {
2657                 chomp $line;
2658                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2659                         $tag{'object'} = $1;
2660                 } elsif ($line =~ m/^type (.+)$/) {
2661                         $tag{'type'} = $1;
2662                 } elsif ($line =~ m/^tag (.+)$/) {
2663                         $tag{'name'} = $1;
2664                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2665                         $tag{'author'} = $1;
2666                         $tag{'author_epoch'} = $2;
2667                         $tag{'author_tz'} = $3;
2668                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2669                                 $tag{'author_name'}  = $1;
2670                                 $tag{'author_email'} = $2;
2671                         } else {
2672                                 $tag{'author_name'} = $tag{'author'};
2673                         }
2674                 } elsif ($line =~ m/--BEGIN/) {
2675                         push @comment, $line;
2676                         last;
2677                 } elsif ($line eq "") {
2678                         last;
2679                 }
2680         }
2681         push @comment, <$fd>;
2682         $tag{'comment'} = \@comment;
2683         close $fd or return;
2684         if (!defined $tag{'name'}) {
2685                 return
2686         };
2687         return %tag
2688 }
2689
2690 sub parse_commit_text {
2691         my ($commit_text, $withparents) = @_;
2692         my @commit_lines = split '\n', $commit_text;
2693         my %co;
2694
2695         pop @commit_lines; # Remove '\0'
2696
2697         if (! @commit_lines) {
2698                 return;
2699         }
2700
2701         my $header = shift @commit_lines;
2702         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2703                 return;
2704         }
2705         ($co{'id'}, my @parents) = split ' ', $header;
2706         while (my $line = shift @commit_lines) {
2707                 last if $line eq "\n";
2708                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2709                         $co{'tree'} = $1;
2710                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2711                         push @parents, $1;
2712                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2713                         $co{'author'} = to_utf8($1);
2714                         $co{'author_epoch'} = $2;
2715                         $co{'author_tz'} = $3;
2716                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2717                                 $co{'author_name'}  = $1;
2718                                 $co{'author_email'} = $2;
2719                         } else {
2720                                 $co{'author_name'} = $co{'author'};
2721                         }
2722                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2723                         $co{'committer'} = to_utf8($1);
2724                         $co{'committer_epoch'} = $2;
2725                         $co{'committer_tz'} = $3;
2726                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2727                                 $co{'committer_name'}  = $1;
2728                                 $co{'committer_email'} = $2;
2729                         } else {
2730                                 $co{'committer_name'} = $co{'committer'};
2731                         }
2732                 }
2733         }
2734         if (!defined $co{'tree'}) {
2735                 return;
2736         };
2737         $co{'parents'} = \@parents;
2738         $co{'parent'} = $parents[0];
2739
2740         foreach my $title (@commit_lines) {
2741                 $title =~ s/^    //;
2742                 if ($title ne "") {
2743                         $co{'title'} = chop_str($title, 80, 5);
2744                         # remove leading stuff of merges to make the interesting part visible
2745                         if (length($title) > 50) {
2746                                 $title =~ s/^Automatic //;
2747                                 $title =~ s/^merge (of|with) /Merge ... /i;
2748                                 if (length($title) > 50) {
2749                                         $title =~ s/(http|rsync):\/\///;
2750                                 }
2751                                 if (length($title) > 50) {
2752                                         $title =~ s/(master|www|rsync)\.//;
2753                                 }
2754                                 if (length($title) > 50) {
2755                                         $title =~ s/kernel.org:?//;
2756                                 }
2757                                 if (length($title) > 50) {
2758                                         $title =~ s/\/pub\/scm//;
2759                                 }
2760                         }
2761                         $co{'title_short'} = chop_str($title, 50, 5);
2762                         last;
2763                 }
2764         }
2765         if (! defined $co{'title'} || $co{'title'} eq "") {
2766                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2767         }
2768         # remove added spaces
2769         foreach my $line (@commit_lines) {
2770                 $line =~ s/^    //;
2771         }
2772         $co{'comment'} = \@commit_lines;
2773
2774         my $age = time - $co{'committer_epoch'};
2775         $co{'age'} = $age;
2776         $co{'age_string'} = age_string($age);
2777         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2778         if ($age > 60*60*24*7*2) {
2779                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2780                 $co{'age_string_age'} = $co{'age_string'};
2781         } else {
2782                 $co{'age_string_date'} = $co{'age_string'};
2783                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2784         }
2785         return %co;
2786 }
2787
2788 sub parse_commit {
2789         my ($commit_id) = @_;
2790         my %co;
2791
2792         local $/ = "\0";
2793
2794         open my $fd, "-|", git_cmd(), "rev-list",
2795                 "--parents",
2796                 "--header",
2797                 "--max-count=1",
2798                 $commit_id,
2799                 "--",
2800                 or die_error(500, "Open git-rev-list failed");
2801         %co = parse_commit_text(<$fd>, 1);
2802         close $fd;
2803
2804         return %co;
2805 }
2806
2807 sub parse_commits {
2808         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2809         my @cos;
2810
2811         $maxcount ||= 1;
2812         $skip ||= 0;
2813
2814         local $/ = "\0";
2815
2816         open my $fd, "-|", git_cmd(), "rev-list",
2817                 "--header",
2818                 @args,
2819                 ("--max-count=" . $maxcount),
2820                 ("--skip=" . $skip),
2821                 @extra_options,
2822                 $commit_id,
2823                 "--",
2824                 ($filename ? ($filename) : ())
2825                 or die_error(500, "Open git-rev-list failed");
2826         while (my $line = <$fd>) {
2827                 my %co = parse_commit_text($line);
2828                 push @cos, \%co;
2829         }
2830         close $fd;
2831
2832         return wantarray ? @cos : \@cos;
2833 }
2834
2835 # parse line of git-diff-tree "raw" output
2836 sub parse_difftree_raw_line {
2837         my $line = shift;
2838         my %res;
2839
2840         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2841         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2842         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2843                 $res{'from_mode'} = $1;
2844                 $res{'to_mode'} = $2;
2845                 $res{'from_id'} = $3;
2846                 $res{'to_id'} = $4;
2847                 $res{'status'} = $5;
2848                 $res{'similarity'} = $6;
2849                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2850                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2851                 } else {
2852                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2853                 }
2854         }
2855         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2856         # combined diff (for merge commit)
2857         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2858                 $res{'nparents'}  = length($1);
2859                 $res{'from_mode'} = [ split(' ', $2) ];
2860                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2861                 $res{'from_id'} = [ split(' ', $3) ];
2862                 $res{'to_id'} = pop @{$res{'from_id'}};
2863                 $res{'status'} = [ split('', $4) ];
2864                 $res{'to_file'} = unquote($5);
2865         }
2866         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2867         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2868                 $res{'commit'} = $1;
2869         }
2870
2871         return wantarray ? %res : \%res;
2872 }
2873
2874 # wrapper: return parsed line of git-diff-tree "raw" output
2875 # (the argument might be raw line, or parsed info)
2876 sub parsed_difftree_line {
2877         my $line_or_ref = shift;
2878
2879         if (ref($line_or_ref) eq "HASH") {
2880                 # pre-parsed (or generated by hand)
2881                 return $line_or_ref;
2882         } else {
2883                 return parse_difftree_raw_line($line_or_ref);
2884         }
2885 }
2886
2887 # parse line of git-ls-tree output
2888 sub parse_ls_tree_line {
2889         my $line = shift;
2890         my %opts = @_;
2891         my %res;
2892
2893         if ($opts{'-l'}) {
2894                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
2895                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
2896
2897                 $res{'mode'} = $1;
2898                 $res{'type'} = $2;
2899                 $res{'hash'} = $3;
2900                 $res{'size'} = $4;
2901                 if ($opts{'-z'}) {
2902                         $res{'name'} = $5;
2903                 } else {
2904                         $res{'name'} = unquote($5);
2905                 }
2906         } else {
2907                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2908                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2909
2910                 $res{'mode'} = $1;
2911                 $res{'type'} = $2;
2912                 $res{'hash'} = $3;
2913                 if ($opts{'-z'}) {
2914                         $res{'name'} = $4;
2915                 } else {
2916                         $res{'name'} = unquote($4);
2917                 }
2918         }
2919
2920         return wantarray ? %res : \%res;
2921 }
2922
2923 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2924 sub parse_from_to_diffinfo {
2925         my ($diffinfo, $from, $to, @parents) = @_;
2926
2927         if ($diffinfo->{'nparents'}) {
2928                 # combined diff
2929                 $from->{'file'} = [];
2930                 $from->{'href'} = [];
2931                 fill_from_file_info($diffinfo, @parents)
2932                         unless exists $diffinfo->{'from_file'};
2933                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2934                         $from->{'file'}[$i] =
2935                                 defined $diffinfo->{'from_file'}[$i] ?
2936                                         $diffinfo->{'from_file'}[$i] :
2937                                         $diffinfo->{'to_file'};
2938                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2939                                 $from->{'href'}[$i] = href(action=>"blob",
2940                                                            hash_base=>$parents[$i],
2941                                                            hash=>$diffinfo->{'from_id'}[$i],
2942                                                            file_name=>$from->{'file'}[$i]);
2943                         } else {
2944                                 $from->{'href'}[$i] = undef;
2945                         }
2946                 }
2947         } else {
2948                 # ordinary (not combined) diff
2949                 $from->{'file'} = $diffinfo->{'from_file'};
2950                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2951                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2952                                                hash=>$diffinfo->{'from_id'},
2953                                                file_name=>$from->{'file'});
2954                 } else {
2955                         delete $from->{'href'};
2956                 }
2957         }
2958
2959         $to->{'file'} = $diffinfo->{'to_file'};
2960         if (!is_deleted($diffinfo)) { # file exists in result
2961                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2962                                      hash=>$diffinfo->{'to_id'},
2963                                      file_name=>$to->{'file'});
2964         } else {
2965                 delete $to->{'href'};
2966         }
2967 }
2968
2969 ## ......................................................................
2970 ## parse to array of hashes functions
2971
2972 sub git_get_heads_list {
2973         my $limit = shift;
2974         my @headslist;
2975
2976         open my $fd, '-|', git_cmd(), 'for-each-ref',
2977                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2978                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2979                 'refs/heads'
2980                 or return;
2981         while (my $line = <$fd>) {
2982                 my %ref_item;
2983
2984                 chomp $line;
2985                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2986                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2987                 my ($committer, $epoch, $tz) =
2988                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2989                 $ref_item{'fullname'}  = $name;
2990                 $name =~ s!^refs/heads/!!;
2991
2992                 $ref_item{'name'}  = $name;
2993                 $ref_item{'id'}    = $hash;
2994                 $ref_item{'title'} = $title || '(no commit message)';
2995                 $ref_item{'epoch'} = $epoch;
2996                 if ($epoch) {
2997                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2998                 } else {
2999                         $ref_item{'age'} = "unknown";
3000                 }
3001
3002                 push @headslist, \%ref_item;
3003         }
3004         close $fd;
3005
3006         return wantarray ? @headslist : \@headslist;
3007 }
3008
3009 sub git_get_tags_list {
3010         my $limit = shift;
3011         my @tagslist;
3012
3013         open my $fd, '-|', git_cmd(), 'for-each-ref',
3014                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3015                 '--format=%(objectname) %(objecttype) %(refname) '.
3016                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3017                 'refs/tags'
3018                 or return;
3019         while (my $line = <$fd>) {
3020                 my %ref_item;
3021
3022                 chomp $line;
3023                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3024                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3025                 my ($creator, $epoch, $tz) =
3026                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3027                 $ref_item{'fullname'} = $name;
3028                 $name =~ s!^refs/tags/!!;
3029
3030                 $ref_item{'type'} = $type;
3031                 $ref_item{'id'} = $id;
3032                 $ref_item{'name'} = $name;
3033                 if ($type eq "tag") {
3034                         $ref_item{'subject'} = $title;
3035                         $ref_item{'reftype'} = $reftype;
3036                         $ref_item{'refid'}   = $refid;
3037                 } else {
3038                         $ref_item{'reftype'} = $type;
3039                         $ref_item{'refid'}   = $id;
3040                 }
3041
3042                 if ($type eq "tag" || $type eq "commit") {
3043                         $ref_item{'epoch'} = $epoch;
3044                         if ($epoch) {
3045                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3046                         } else {
3047                                 $ref_item{'age'} = "unknown";
3048                         }
3049                 }
3050
3051                 push @tagslist, \%ref_item;
3052         }
3053         close $fd;
3054
3055         return wantarray ? @tagslist : \@tagslist;
3056 }
3057
3058 ## ----------------------------------------------------------------------
3059 ## filesystem-related functions
3060
3061 sub get_file_owner {
3062         my $path = shift;
3063
3064         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3065         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3066         if (!defined $gcos) {
3067                 return undef;
3068         }
3069         my $owner = $gcos;
3070         $owner =~ s/[,;].*$//;
3071         return to_utf8($owner);
3072 }
3073
3074 # assume that file exists
3075 sub insert_file {
3076         my $filename = shift;
3077
3078         open my $fd, '<', $filename;
3079         print map { to_utf8($_) } <$fd>;
3080         close $fd;
3081 }
3082
3083 ## ......................................................................
3084 ## mimetype related functions
3085
3086 sub mimetype_guess_file {
3087         my $filename = shift;
3088         my $mimemap = shift;
3089         -r $mimemap or return undef;
3090
3091         my %mimemap;
3092         open(my $mh, '<', $mimemap) or return undef;
3093         while (<$mh>) {
3094                 next if m/^#/; # skip comments
3095                 my ($mimetype, $exts) = split(/\t+/);
3096                 if (defined $exts) {
3097                         my @exts = split(/\s+/, $exts);
3098                         foreach my $ext (@exts) {
3099                                 $mimemap{$ext} = $mimetype;
3100                         }
3101                 }
3102         }
3103         close($mh);
3104
3105         $filename =~ /\.([^.]*)$/;
3106         return $mimemap{$1};
3107 }
3108
3109 sub mimetype_guess {
3110         my $filename = shift;
3111         my $mime;
3112         $filename =~ /\./ or return undef;
3113
3114         if ($mimetypes_file) {
3115                 my $file = $mimetypes_file;
3116                 if ($file !~ m!^/!) { # if it is relative path
3117                         # it is relative to project
3118                         $file = "$projectroot/$project/$file";
3119                 }
3120                 $mime = mimetype_guess_file($filename, $file);
3121         }
3122         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3123         return $mime;
3124 }
3125
3126 sub blob_mimetype {
3127         my $fd = shift;
3128         my $filename = shift;
3129
3130         if ($filename) {
3131                 my $mime = mimetype_guess($filename);
3132                 $mime and return $mime;
3133         }
3134
3135         # just in case
3136         return $default_blob_plain_mimetype unless $fd;
3137
3138         if (-T $fd) {
3139                 return 'text/plain';
3140         } elsif (! $filename) {
3141                 return 'application/octet-stream';
3142         } elsif ($filename =~ m/\.png$/i) {
3143                 return 'image/png';
3144         } elsif ($filename =~ m/\.gif$/i) {
3145                 return 'image/gif';
3146         } elsif ($filename =~ m/\.jpe?g$/i) {
3147                 return 'image/jpeg';
3148         } else {
3149                 return 'application/octet-stream';
3150         }
3151 }
3152
3153 sub blob_contenttype {
3154         my ($fd, $file_name, $type) = @_;
3155
3156         $type ||= blob_mimetype($fd, $file_name);
3157         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3158                 $type .= "; charset=$default_text_plain_charset";
3159         }
3160
3161         return $type;
3162 }
3163
3164 ## ======================================================================
3165 ## functions printing HTML: header, footer, error page
3166
3167 sub git_header_html {
3168         my $status = shift || "200 OK";
3169         my $expires = shift;
3170
3171         my $title = "$site_name";
3172         if (defined $project) {
3173                 $title .= " - " . to_utf8($project);
3174                 if (defined $action) {
3175                         $title .= "/$action";
3176                         if (defined $file_name) {
3177                                 $title .= " - " . esc_path($file_name);
3178                                 if ($action eq "tree" && $file_name !~ m|/$|) {
3179                                         $title .= "/";
3180                                 }
3181                         }
3182                 }
3183         }
3184         my $content_type;
3185         # require explicit support from the UA if we are to send the page as
3186         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3187         # we have to do this because MSIE sometimes globs '*/*', pretending to
3188         # support xhtml+xml but choking when it gets what it asked for.
3189         if (defined $cgi->http('HTTP_ACCEPT') &&
3190             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3191             $cgi->Accept('application/xhtml+xml') != 0) {
3192                 $content_type = 'application/xhtml+xml';
3193         } else {
3194                 $content_type = 'text/html';
3195         }
3196         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3197                            -status=> $status, -expires => $expires);
3198         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3199         print <<EOF;
3200 <?xml version="1.0" encoding="utf-8"?>
3201 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3202 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3203 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3204 <!-- git core binaries version $git_version -->
3205 <head>
3206 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3207 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3208 <meta name="robots" content="index, nofollow"/>
3209 <title>$title</title>
3210 EOF
3211         # the stylesheet, favicon etc urls won't work correctly with path_info
3212         # unless we set the appropriate base URL
3213         if ($ENV{'PATH_INFO'}) {
3214                 print "<base href=\"".esc_url($base_url)."\" />\n";
3215         }
3216         # print out each stylesheet that exist, providing backwards capability
3217         # for those people who defined $stylesheet in a config file
3218         if (defined $stylesheet) {
3219                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3220         } else {
3221                 foreach my $stylesheet (@stylesheets) {
3222                         next unless $stylesheet;
3223                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3224                 }
3225         }
3226         if (defined $project) {
3227                 my %href_params = get_feed_info();
3228                 if (!exists $href_params{'-title'}) {
3229                         $href_params{'-title'} = 'log';
3230                 }
3231
3232                 foreach my $format qw(RSS Atom) {
3233                         my $type = lc($format);
3234                         my %link_attr = (
3235                                 '-rel' => 'alternate',
3236                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3237                                 '-type' => "application/$type+xml"
3238                         );
3239
3240                         $href_params{'action'} = $type;
3241                         $link_attr{'-href'} = href(%href_params);
3242                         print "<link ".
3243                               "rel=\"$link_attr{'-rel'}\" ".
3244                               "title=\"$link_attr{'-title'}\" ".
3245                               "href=\"$link_attr{'-href'}\" ".
3246                               "type=\"$link_attr{'-type'}\" ".
3247                               "/>\n";
3248
3249                         $href_params{'extra_options'} = '--no-merges';
3250                         $link_attr{'-href'} = href(%href_params);
3251                         $link_attr{'-title'} .= ' (no merges)';
3252                         print "<link ".
3253                               "rel=\"$link_attr{'-rel'}\" ".
3254                               "title=\"$link_attr{'-title'}\" ".
3255                               "href=\"$link_attr{'-href'}\" ".
3256                               "type=\"$link_attr{'-type'}\" ".
3257                               "/>\n";
3258                 }
3259
3260         } else {
3261                 printf('<link rel="alternate" title="%s projects list" '.
3262                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3263                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3264                 printf('<link rel="alternate" title="%s projects feeds" '.
3265                        'href="%s" type="text/x-opml" />'."\n",
3266                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3267         }
3268         if (defined $favicon) {
3269                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3270         }
3271
3272         print "</head>\n" .
3273               "<body>\n";
3274
3275         if (defined $site_header && -f $site_header) {
3276                 insert_file($site_header);
3277         }
3278
3279         print "<div class=\"page_header\">\n" .
3280               $cgi->a({-href => esc_url($logo_url),
3281                        -title => $logo_label},
3282                       qq(<img src=").esc_url($logo).qq(" width="72" height="27" alt="git" class="logo"/>));
3283         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3284         if (defined $project) {
3285                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3286                 if (defined $action) {
3287                         print " / $action";
3288                 }
3289                 print "\n";
3290         }
3291         print "</div>\n";
3292
3293         my $have_search = gitweb_check_feature('search');
3294         if (defined $project && $have_search) {
3295                 if (!defined $searchtext) {
3296                         $searchtext = "";
3297                 }
3298                 my $search_hash;
3299                 if (defined $hash_base) {
3300                         $search_hash = $hash_base;
3301                 } elsif (defined $hash) {
3302                         $search_hash = $hash;
3303                 } else {
3304                         $search_hash = "HEAD";
3305                 }
3306                 my $action = $my_uri;
3307                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3308                 if ($use_pathinfo) {
3309                         $action .= "/".esc_url($project);
3310                 }
3311                 print $cgi->startform(-method => "get", -action => $action) .
3312                       "<div class=\"search\">\n" .
3313                       (!$use_pathinfo &&
3314                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3315                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3316                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3317                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3318                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3319                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3320                       " search:\n",
3321                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3322                       "<span title=\"Extended regular expression\">" .
3323                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3324                                      -checked => $search_use_regexp) .
3325                       "</span>" .
3326                       "</div>" .
3327                       $cgi->end_form() . "\n";
3328         }
3329 }
3330
3331 sub git_footer_html {
3332         my $feed_class = 'rss_logo';
3333
3334         print "<div class=\"page_footer\">\n";
3335         if (defined $project) {
3336                 my $descr = git_get_project_description($project);
3337                 if (defined $descr) {
3338                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3339                 }
3340
3341                 my %href_params = get_feed_info();
3342                 if (!%href_params) {
3343                         $feed_class .= ' generic';
3344                 }
3345                 $href_params{'-title'} ||= 'log';
3346
3347                 foreach my $format qw(RSS Atom) {
3348                         $href_params{'action'} = lc($format);
3349                         print $cgi->a({-href => href(%href_params),
3350                                       -title => "$href_params{'-title'} $format feed",
3351                                       -class => $feed_class}, $format)."\n";
3352                 }
3353
3354         } else {
3355                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3356                               -class => $feed_class}, "OPML") . " ";
3357                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3358                               -class => $feed_class}, "TXT") . "\n";
3359         }
3360         print "</div>\n"; # class="page_footer"
3361
3362         if (defined $t0 && gitweb_check_feature('timed')) {
3363                 print "<div id=\"generating_info\">\n";
3364                 print 'This page took '.
3365                       '<span id="generating_time" class="time_span">'.
3366                       Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
3367                       ' seconds </span>'.
3368                       ' and '.
3369                       '<span id="generating_cmd">'.
3370                       $number_of_git_cmds.
3371                       '</span> git commands '.
3372                       " to generate.\n";
3373                 print "</div>\n"; # class="page_footer"
3374         }
3375
3376         if (defined $site_footer && -f $site_footer) {
3377                 insert_file($site_footer);
3378         }
3379
3380         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
3381         if (defined $action &&
3382             $action eq 'blame_incremental') {
3383                 print qq!<script type="text/javascript">\n!.
3384                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3385                       qq!           "!. href() .qq!");\n!.
3386                       qq!</script>\n!;
3387         } elsif (gitweb_check_feature('javascript-actions')) {
3388                 print qq!<script type="text/javascript">\n!.
3389                       qq!window.onload = fixLinks;\n!.
3390                       qq!</script>\n!;
3391         }
3392
3393         print "</body>\n" .
3394               "</html>";
3395 }
3396
3397 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3398 # Example: die_error(404, 'Hash not found')
3399 # By convention, use the following status codes (as defined in RFC 2616):
3400 # 400: Invalid or missing CGI parameters, or
3401 #      requested object exists but has wrong type.
3402 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3403 #      this server or project.
3404 # 404: Requested object/revision/project doesn't exist.
3405 # 500: The server isn't configured properly, or
3406 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3407 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3408 # 503: The server is currently unavailable (because it is overloaded,
3409 #      or down for maintenance).  Generally, this is a temporary state.
3410 sub die_error {
3411         my $status = shift || 500;
3412         my $error = esc_html(shift) || "Internal Server Error";
3413         my $extra = shift;
3414
3415         my %http_responses = (
3416                 400 => '400 Bad Request',
3417                 403 => '403 Forbidden',
3418                 404 => '404 Not Found',
3419                 500 => '500 Internal Server Error',
3420                 503 => '503 Service Unavailable',
3421         );
3422         git_header_html($http_responses{$status});
3423         print <<EOF;
3424 <div class="page_body">
3425 <br /><br />
3426 $status - $error
3427 <br />
3428 EOF
3429         if (defined $extra) {
3430                 print "<hr />\n" .
3431                       "$extra\n";
3432         }
3433         print "</div>\n";
3434
3435         git_footer_html();
3436         exit;
3437 }
3438
3439 ## ----------------------------------------------------------------------
3440 ## functions printing or outputting HTML: navigation
3441
3442 sub git_print_page_nav {
3443         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3444         $extra = '' if !defined $extra; # pager or formats
3445
3446         my @navs = qw(summary shortlog log commit commitdiff tree);
3447         if ($suppress) {
3448                 @navs = grep { $_ ne $suppress } @navs;
3449         }
3450
3451         my %arg = map { $_ => {action=>$_} } @navs;
3452         if (defined $head) {
3453                 for (qw(commit commitdiff)) {
3454                         $arg{$_}{'hash'} = $head;
3455                 }
3456                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3457                         for (qw(shortlog log)) {
3458                                 $arg{$_}{'hash'} = $head;
3459                         }
3460                 }
3461         }
3462
3463         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3464         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3465
3466         my @actions = gitweb_get_feature('actions');
3467         my %repl = (
3468                 '%' => '%',
3469                 'n' => $project,         # project name
3470                 'f' => $git_dir,         # project path within filesystem
3471                 'h' => $treehead || '',  # current hash ('h' parameter)
3472                 'b' => $treebase || '',  # hash base ('hb' parameter)
3473         );
3474         while (@actions) {
3475                 my ($label, $link, $pos) = splice(@actions,0,3);
3476                 # insert
3477                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3478                 # munch munch
3479                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3480                 $arg{$label}{'_href'} = $link;
3481         }
3482
3483         print "<div class=\"page_nav\">\n" .
3484                 (join " | ",
3485                  map { $_ eq $current ?
3486                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3487                  } @navs);
3488         print "<br/>\n$extra<br/>\n" .
3489               "</div>\n";
3490 }
3491
3492 sub format_paging_nav {
3493         my ($action, $page, $has_next_link) = @_;
3494         my $paging_nav;
3495
3496
3497         if ($page > 0) {
3498                 $paging_nav .=
3499                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3500                         " &sdot; " .
3501                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3502                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3503         } else {
3504                 $paging_nav .= "first &sdot; prev";
3505         }
3506
3507         if ($has_next_link) {
3508                 $paging_nav .= " &sdot; " .
3509                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3510                                  -accesskey => "n", -title => "Alt-n"}, "next");
3511         } else {
3512                 $paging_nav .= " &sdot; next";
3513         }
3514
3515         return $paging_nav;
3516 }
3517
3518 ## ......................................................................
3519 ## functions printing or outputting HTML: div
3520
3521 sub git_print_header_div {
3522         my ($action, $title, $hash, $hash_base) = @_;
3523         my %args = ();
3524
3525         $args{'action'} = $action;
3526         $args{'hash'} = $hash if $hash;
3527         $args{'hash_base'} = $hash_base if $hash_base;
3528
3529         print "<div class=\"header\">\n" .
3530               $cgi->a({-href => href(%args), -class => "title"},
3531               $title ? $title : $action) .
3532               "\n</div>\n";
3533 }
3534
3535 sub print_local_time {
3536         print format_local_time(@_);
3537 }
3538
3539 sub format_local_time {
3540         my $localtime = '';
3541         my %date = @_;
3542         if ($date{'hour_local'} < 6) {
3543                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3544                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3545         } else {
3546                 $localtime .= sprintf(" (%02d:%02d %s)",
3547                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3548         }
3549
3550         return $localtime;
3551 }
3552
3553 # Outputs the author name and date in long form
3554 sub git_print_authorship {
3555         my $co = shift;
3556         my %opts = @_;
3557         my $tag = $opts{-tag} || 'div';
3558         my $author = $co->{'author_name'};
3559
3560         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3561         print "<$tag class=\"author_date\">" .
3562               format_search_author($author, "author", esc_html($author)) .
3563               " [$ad{'rfc2822'}";
3564         print_local_time(%ad) if ($opts{-localtime});
3565         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3566                   . "</$tag>\n";
3567 }
3568
3569 # Outputs table rows containing the full author or committer information,
3570 # in the format expected for 'commit' view (& similia).
3571 # Parameters are a commit hash reference, followed by the list of people
3572 # to output information for. If the list is empty it defalts to both
3573 # author and committer.
3574 sub git_print_authorship_rows {
3575         my $co = shift;
3576         # too bad we can't use @people = @_ || ('author', 'committer')
3577         my @people = @_;
3578         @people = ('author', 'committer') unless @people;
3579         foreach my $who (@people) {
3580                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3581                 print "<tr><td>$who</td><td>" .
3582                       format_search_author($co->{"${who}_name"}, $who,
3583                                esc_html($co->{"${who}_name"})) . " " .
3584                       format_search_author($co->{"${who}_email"}, $who,
3585                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3586                       "</td><td rowspan=\"2\">" .
3587                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3588                       "</td></tr>\n" .
3589                       "<tr>" .
3590                       "<td></td><td> $wd{'rfc2822'}";
3591                 print_local_time(%wd);
3592                 print "</td>" .
3593                       "</tr>\n";
3594         }
3595 }
3596
3597 sub git_print_page_path {
3598         my $name = shift;
3599         my $type = shift;
3600         my $hb = shift;
3601
3602
3603         print "<div class=\"page_path\">";
3604         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3605                       -title => 'tree root'}, to_utf8("[$project]"));
3606         print " / ";
3607         if (defined $name) {
3608                 my @dirname = split '/', $name;
3609                 my $basename = pop @dirname;
3610                 my $fullname = '';
3611
3612                 foreach my $dir (@dirname) {
3613                         $fullname .= ($fullname ? '/' : '') . $dir;
3614                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3615                                                      hash_base=>$hb),
3616                                       -title => $fullname}, esc_path($dir));
3617                         print " / ";
3618                 }
3619                 if (defined $type && $type eq 'blob') {
3620                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3621                                                      hash_base=>$hb),
3622                                       -title => $name}, esc_path($basename));
3623                 } elsif (defined $type && $type eq 'tree') {
3624                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3625                                                      hash_base=>$hb),
3626                                       -title => $name}, esc_path($basename));
3627                         print " / ";
3628                 } else {
3629                         print esc_path($basename);
3630                 }
3631         }
3632         print "<br/></div>\n";
3633 }
3634
3635 sub git_print_log {
3636         my $log = shift;
3637         my %opts = @_;
3638
3639         if ($opts{'-remove_title'}) {
3640                 # remove title, i.e. first line of log
3641                 shift @$log;
3642         }
3643         # remove leading empty lines
3644         while (defined $log->[0] && $log->[0] eq "") {
3645                 shift @$log;
3646         }
3647
3648         # print log
3649         my $signoff = 0;
3650         my $empty = 0;
3651         foreach my $line (@$log) {
3652                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3653                         $signoff = 1;
3654                         $empty = 0;
3655                         if (! $opts{'-remove_signoff'}) {
3656                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3657                                 next;
3658                         } else {
3659                                 # remove signoff lines
3660                                 next;
3661                         }
3662                 } else {
3663                         $signoff = 0;
3664                 }
3665
3666                 # print only one empty line
3667                 # do not print empty line after signoff
3668                 if ($line eq "") {
3669                         next if ($empty || $signoff);
3670                         $empty = 1;
3671                 } else {
3672                         $empty = 0;
3673                 }
3674
3675                 print format_log_line_html($line) . "<br/>\n";
3676         }
3677
3678         if ($opts{'-final_empty_line'}) {
3679                 # end with single empty line
3680                 print "<br/>\n" unless $empty;
3681         }
3682 }
3683
3684 # return link target (what link points to)
3685 sub git_get_link_target {
3686         my $hash = shift;
3687         my $link_target;
3688
3689         # read link
3690         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3691                 or return;
3692         {
3693                 local $/ = undef;
3694                 $link_target = <$fd>;
3695         }
3696         close $fd
3697                 or return;
3698
3699         return $link_target;
3700 }
3701
3702 # given link target, and the directory (basedir) the link is in,
3703 # return target of link relative to top directory (top tree);
3704 # return undef if it is not possible (including absolute links).
3705 sub normalize_link_target {
3706         my ($link_target, $basedir) = @_;
3707
3708         # absolute symlinks (beginning with '/') cannot be normalized
3709         return if (substr($link_target, 0, 1) eq '/');
3710
3711         # normalize link target to path from top (root) tree (dir)
3712         my $path;
3713         if ($basedir) {
3714                 $path = $basedir . '/' . $link_target;
3715         } else {
3716                 # we are in top (root) tree (dir)
3717                 $path = $link_target;
3718         }
3719
3720         # remove //, /./, and /../
3721         my @path_parts;
3722         foreach my $part (split('/', $path)) {
3723                 # discard '.' and ''
3724                 next if (!$part || $part eq '.');
3725                 # handle '..'
3726                 if ($part eq '..') {
3727                         if (@path_parts) {
3728                                 pop @path_parts;
3729                         } else {
3730                                 # link leads outside repository (outside top dir)
3731                                 return;
3732                         }
3733                 } else {
3734                         push @path_parts, $part;
3735                 }
3736         }
3737         $path = join('/', @path_parts);
3738
3739         return $path;
3740 }
3741
3742 # print tree entry (row of git_tree), but without encompassing <tr> element
3743 sub git_print_tree_entry {
3744         my ($t, $basedir, $hash_base, $have_blame) = @_;
3745
3746         my %base_key = ();
3747         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3748
3749         # The format of a table row is: mode list link.  Where mode is
3750         # the mode of the entry, list is the name of the entry, an href,
3751         # and link is the action links of the entry.
3752
3753         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3754         if (exists $t->{'size'}) {
3755                 print "<td class=\"size\">$t->{'size'}</td>\n";
3756         }
3757         if ($t->{'type'} eq "blob") {
3758                 print "<td class=\"list\">" .
3759                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3760                                                file_name=>"$basedir$t->{'name'}", %base_key),
3761                                 -class => "list"}, esc_path($t->{'name'}));
3762                 if (S_ISLNK(oct $t->{'mode'})) {
3763                         my $link_target = git_get_link_target($t->{'hash'});
3764                         if ($link_target) {
3765                                 my $norm_target = normalize_link_target($link_target, $basedir);
3766                                 if (defined $norm_target) {
3767                                         print " -> " .
3768                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3769                                                                      file_name=>$norm_target),
3770                                                        -title => $norm_target}, esc_path($link_target));
3771                                 } else {
3772                                         print " -> " . esc_path($link_target);
3773                                 }
3774                         }
3775                 }
3776                 print "</td>\n";
3777                 print "<td class=\"link\">";
3778                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3779                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3780                               "blob");
3781                 if ($have_blame) {
3782                         print " | " .
3783                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3784                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3785                                       "blame");
3786                 }
3787                 if (defined $hash_base) {
3788                         print " | " .
3789                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3790                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3791                                       "history");
3792                 }
3793                 print " | " .
3794                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3795                                                file_name=>"$basedir$t->{'name'}")},
3796                                 "raw");
3797                 print "</td>\n";
3798
3799         } elsif ($t->{'type'} eq "tree") {
3800                 print "<td class=\"list\">";
3801                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3802                                              file_name=>"$basedir$t->{'name'}",
3803                                              %base_key)},
3804                               esc_path($t->{'name'}));
3805                 print "</td>\n";
3806                 print "<td class=\"link\">";
3807                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3808                                              file_name=>"$basedir$t->{'name'}",
3809                                              %base_key)},
3810                               "tree");
3811                 if (defined $hash_base) {
3812                         print " | " .
3813                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3814                                                      file_name=>"$basedir$t->{'name'}")},
3815                                       "history");
3816                 }
3817                 print "</td>\n";
3818         } else {
3819                 # unknown object: we can only present history for it
3820                 # (this includes 'commit' object, i.e. submodule support)
3821                 print "<td class=\"list\">" .
3822                       esc_path($t->{'name'}) .
3823                       "</td>\n";
3824                 print "<td class=\"link\">";
3825                 if (defined $hash_base) {
3826                         print $cgi->a({-href => href(action=>"history",
3827                                                      hash_base=>$hash_base,
3828                                                      file_name=>"$basedir$t->{'name'}")},
3829                                       "history");
3830                 }
3831                 print "</td>\n";
3832         }
3833 }
3834
3835 ## ......................................................................
3836 ## functions printing large fragments of HTML
3837
3838 # get pre-image filenames for merge (combined) diff
3839 sub fill_from_file_info {
3840         my ($diff, @parents) = @_;
3841
3842         $diff->{'from_file'} = [ ];
3843         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3844         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3845                 if ($diff->{'status'}[$i] eq 'R' ||
3846                     $diff->{'status'}[$i] eq 'C') {
3847                         $diff->{'from_file'}[$i] =
3848                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3849                 }
3850         }
3851
3852         return $diff;
3853 }
3854
3855 # is current raw difftree line of file deletion
3856 sub is_deleted {
3857         my $diffinfo = shift;
3858
3859         return $diffinfo->{'to_id'} eq ('0' x 40);
3860 }
3861
3862 # does patch correspond to [previous] difftree raw line
3863 # $diffinfo  - hashref of parsed raw diff format
3864 # $patchinfo - hashref of parsed patch diff format
3865 #              (the same keys as in $diffinfo)
3866 sub is_patch_split {
3867         my ($diffinfo, $patchinfo) = @_;
3868
3869         return defined $diffinfo && defined $patchinfo
3870                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3871 }
3872
3873
3874 sub git_difftree_body {
3875         my ($difftree, $hash, @parents) = @_;
3876         my ($parent) = $parents[0];
3877         my $have_blame = gitweb_check_feature('blame');
3878         print "<div class=\"list_head\">\n";
3879         if ($#{$difftree} > 10) {
3880                 print(($#{$difftree} + 1) . " files changed:\n");
3881         }
3882         print "</div>\n";
3883
3884         print "<table class=\"" .
3885               (@parents > 1 ? "combined " : "") .
3886               "diff_tree\">\n";
3887
3888         # header only for combined diff in 'commitdiff' view
3889         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3890         if ($has_header) {
3891                 # table header
3892                 print "<thead><tr>\n" .
3893                        "<th></th><th></th>\n"; # filename, patchN link
3894                 for (my $i = 0; $i < @parents; $i++) {
3895                         my $par = $parents[$i];
3896                         print "<th>" .
3897                               $cgi->a({-href => href(action=>"commitdiff",
3898                                                      hash=>$hash, hash_parent=>$par),
3899                                        -title => 'commitdiff to parent number ' .
3900                                                   ($i+1) . ': ' . substr($par,0,7)},
3901                                       $i+1) .
3902                               "&nbsp;</th>\n";
3903                 }
3904                 print "</tr></thead>\n<tbody>\n";
3905         }
3906
3907         my $alternate = 1;
3908         my $patchno = 0;
3909         foreach my $line (@{$difftree}) {
3910                 my $diff = parsed_difftree_line($line);
3911
3912                 if ($alternate) {
3913                         print "<tr class=\"dark\">\n";
3914                 } else {
3915                         print "<tr class=\"light\">\n";
3916                 }
3917                 $alternate ^= 1;
3918
3919                 if (exists $diff->{'nparents'}) { # combined diff
3920
3921                         fill_from_file_info($diff, @parents)
3922                                 unless exists $diff->{'from_file'};
3923
3924                         if (!is_deleted($diff)) {
3925                                 # file exists in the result (child) commit
3926                                 print "<td>" .
3927                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3928                                                              file_name=>$diff->{'to_file'},
3929                                                              hash_base=>$hash),
3930                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3931                                       "</td>\n";
3932                         } else {
3933                                 print "<td>" .
3934                                       esc_path($diff->{'to_file'}) .
3935                                       "</td>\n";
3936                         }
3937
3938                         if ($action eq 'commitdiff') {
3939                                 # link to patch
3940                                 $patchno++;
3941                                 print "<td class=\"link\">" .
3942                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3943                                       " | " .
3944                                       "</td>\n";
3945                         }
3946
3947                         my $has_history = 0;
3948                         my $not_deleted = 0;
3949                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3950                                 my $hash_parent = $parents[$i];
3951                                 my $from_hash = $diff->{'from_id'}[$i];
3952                                 my $from_path = $diff->{'from_file'}[$i];
3953                                 my $status = $diff->{'status'}[$i];
3954
3955                                 $has_history ||= ($status ne 'A');
3956                                 $not_deleted ||= ($status ne 'D');
3957
3958                                 if ($status eq 'A') {
3959                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3960                                 } elsif ($status eq 'D') {
3961                                         print "<td class=\"link\">" .
3962                                               $cgi->a({-href => href(action=>"blob",
3963                                                                      hash_base=>$hash,
3964                                                                      hash=>$from_hash,
3965                                                                      file_name=>$from_path)},
3966                                                       "blob" . ($i+1)) .
3967                                               " | </td>\n";
3968                                 } else {
3969                                         if ($diff->{'to_id'} eq $from_hash) {
3970                                                 print "<td class=\"link nochange\">";
3971                                         } else {
3972                                                 print "<td class=\"link\">";
3973                                         }
3974                                         print $cgi->a({-href => href(action=>"blobdiff",
3975                                                                      hash=>$diff->{'to_id'},
3976                                                                      hash_parent=>$from_hash,
3977                                                                      hash_base=>$hash,
3978                                                                      hash_parent_base=>$hash_parent,
3979                                                                      file_name=>$diff->{'to_file'},
3980                                                                      file_parent=>$from_path)},
3981                                                       "diff" . ($i+1)) .
3982                                               " | </td>\n";
3983                                 }
3984                         }
3985
3986                         print "<td class=\"link\">";
3987                         if ($not_deleted) {
3988                                 print $cgi->a({-href => href(action=>"blob",
3989                                                              hash=>$diff->{'to_id'},
3990                                                              file_name=>$diff->{'to_file'},
3991                                                              hash_base=>$hash)},
3992                                               "blob");
3993                                 print " | " if ($has_history);
3994                         }
3995                         if ($has_history) {
3996                                 print $cgi->a({-href => href(action=>"history",
3997                                                              file_name=>$diff->{'to_file'},
3998                                                              hash_base=>$hash)},
3999                                               "history");
4000                         }
4001                         print "</td>\n";
4002
4003                         print "</tr>\n";
4004                         next; # instead of 'else' clause, to avoid extra indent
4005                 }
4006                 # else ordinary diff
4007
4008                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4009                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4010                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4011                         $to_mode_oct = oct $diff->{'to_mode'};
4012                         if (S_ISREG($to_mode_oct)) { # only for regular file
4013                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4014                         }
4015                         $to_file_type = file_type($diff->{'to_mode'});
4016                 }
4017                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4018                         $from_mode_oct = oct $diff->{'from_mode'};
4019                         if (S_ISREG($to_mode_oct)) { # only for regular file
4020                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4021                         }
4022                         $from_file_type = file_type($diff->{'from_mode'});
4023                 }
4024
4025                 if ($diff->{'status'} eq "A") { # created
4026                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4027                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4028                         $mode_chng   .= "]</span>";
4029                         print "<td>";
4030                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4031                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4032                                       -class => "list"}, esc_path($diff->{'file'}));
4033                         print "</td>\n";
4034                         print "<td>$mode_chng</td>\n";
4035                         print "<td class=\"link\">";
4036                         if ($action eq 'commitdiff') {
4037                                 # link to patch
4038                                 $patchno++;
4039                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4040                                 print " | ";
4041                         }
4042                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4043                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4044                                       "blob");
4045                         print "</td>\n";
4046
4047                 } elsif ($diff->{'status'} eq "D") { # deleted
4048                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4049                         print "<td>";
4050                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4051                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4052                                        -class => "list"}, esc_path($diff->{'file'}));
4053                         print "</td>\n";
4054                         print "<td>$mode_chng</td>\n";
4055                         print "<td class=\"link\">";
4056                         if ($action eq 'commitdiff') {
4057                                 # link to patch
4058                                 $patchno++;
4059                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4060                                 print " | ";
4061                         }
4062                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4063                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4064                                       "blob") . " | ";
4065                         if ($have_blame) {
4066                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4067                                                              file_name=>$diff->{'file'})},
4068                                               "blame") . " | ";
4069                         }
4070                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4071                                                      file_name=>$diff->{'file'})},
4072                                       "history");
4073                         print "</td>\n";
4074
4075                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4076                         my $mode_chnge = "";
4077                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4078                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4079                                 if ($from_file_type ne $to_file_type) {
4080                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4081                                 }
4082                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4083                                         if ($from_mode_str && $to_mode_str) {
4084                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4085                                         } elsif ($to_mode_str) {
4086                                                 $mode_chnge .= " mode: $to_mode_str";
4087                                         }
4088                                 }
4089                                 $mode_chnge .= "]</span>\n";
4090                         }
4091                         print "<td>";
4092                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4093                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4094                                       -class => "list"}, esc_path($diff->{'file'}));
4095                         print "</td>\n";
4096                         print "<td>$mode_chnge</td>\n";
4097                         print "<td class=\"link\">";
4098                         if ($action eq 'commitdiff') {
4099                                 # link to patch
4100                                 $patchno++;
4101                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4102                                       " | ";
4103                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4104                                 # "commit" view and modified file (not onlu mode changed)
4105                                 print $cgi->a({-href => href(action=>"blobdiff",
4106                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4107                                                              hash_base=>$hash, hash_parent_base=>$parent,
4108                                                              file_name=>$diff->{'file'})},
4109                                               "diff") .
4110                                       " | ";
4111                         }
4112                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4113                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4114                                        "blob") . " | ";
4115                         if ($have_blame) {
4116                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4117                                                              file_name=>$diff->{'file'})},
4118                                               "blame") . " | ";
4119                         }
4120                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4121                                                      file_name=>$diff->{'file'})},
4122                                       "history");
4123                         print "</td>\n";
4124
4125                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4126                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4127                         my $nstatus = $status_name{$diff->{'status'}};
4128                         my $mode_chng = "";
4129                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4130                                 # mode also for directories, so we cannot use $to_mode_str
4131                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4132                         }
4133                         print "<td>" .
4134                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4135                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4136                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4137                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4138                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4139                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4140                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4141                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4142                               "<td class=\"link\">";
4143                         if ($action eq 'commitdiff') {
4144                                 # link to patch
4145                                 $patchno++;
4146                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4147                                       " | ";
4148                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4149                                 # "commit" view and modified file (not only pure rename or copy)
4150                                 print $cgi->a({-href => href(action=>"blobdiff",
4151                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4152                                                              hash_base=>$hash, hash_parent_base=>$parent,
4153                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4154                                               "diff") .
4155                                       " | ";
4156                         }
4157                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4158                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4159                                       "blob") . " | ";
4160                         if ($have_blame) {
4161                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4162                                                              file_name=>$diff->{'to_file'})},
4163                                               "blame") . " | ";
4164                         }
4165                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4166                                                     file_name=>$diff->{'to_file'})},
4167                                       "history");
4168                         print "</td>\n";
4169
4170                 } # we should not encounter Unmerged (U) or Unknown (X) status
4171                 print "</tr>\n";
4172         }
4173         print "</tbody>" if $has_header;
4174         print "</table>\n";
4175 }
4176
4177 sub git_patchset_body {
4178         my ($fd, $difftree, $hash, @hash_parents) = @_;
4179         my ($hash_parent) = $hash_parents[0];
4180
4181         my $is_combined = (@hash_parents > 1);
4182         my $patch_idx = 0;
4183         my $patch_number = 0;
4184         my $patch_line;
4185         my $diffinfo;
4186         my $to_name;
4187         my (%from, %to);
4188
4189         print "<div class=\"patchset\">\n";
4190
4191         # skip to first patch
4192         while ($patch_line = <$fd>) {
4193                 chomp $patch_line;
4194
4195                 last if ($patch_line =~ m/^diff /);
4196         }
4197
4198  PATCH:
4199         while ($patch_line) {
4200
4201                 # parse "git diff" header line
4202                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4203                         # $1 is from_name, which we do not use
4204                         $to_name = unquote($2);
4205                         $to_name =~ s!^b/!!;
4206                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4207                         # $1 is 'cc' or 'combined', which we do not use
4208                         $to_name = unquote($2);
4209                 } else {
4210                         $to_name = undef;
4211                 }
4212
4213                 # check if current patch belong to current raw line
4214                 # and parse raw git-diff line if needed
4215                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4216                         # this is continuation of a split patch
4217                         print "<div class=\"patch cont\">\n";
4218                 } else {
4219                         # advance raw git-diff output if needed
4220                         $patch_idx++ if defined $diffinfo;
4221
4222                         # read and prepare patch information
4223                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4224
4225                         # compact combined diff output can have some patches skipped
4226                         # find which patch (using pathname of result) we are at now;
4227                         if ($is_combined) {
4228                                 while ($to_name ne $diffinfo->{'to_file'}) {
4229                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4230                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4231                                               "</div>\n";  # class="patch"
4232
4233                                         $patch_idx++;
4234                                         $patch_number++;
4235
4236                                         last if $patch_idx > $#$difftree;
4237                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4238                                 }
4239                         }
4240
4241                         # modifies %from, %to hashes
4242                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4243
4244                         # this is first patch for raw difftree line with $patch_idx index
4245                         # we index @$difftree array from 0, but number patches from 1
4246                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4247                 }
4248
4249                 # git diff header
4250                 #assert($patch_line =~ m/^diff /) if DEBUG;
4251                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4252                 $patch_number++;
4253                 # print "git diff" header
4254                 print format_git_diff_header_line($patch_line, $diffinfo,
4255                                                   \%from, \%to);
4256
4257                 # print extended diff header
4258                 print "<div class=\"diff extended_header\">\n";
4259         EXTENDED_HEADER:
4260                 while ($patch_line = <$fd>) {
4261                         chomp $patch_line;
4262
4263                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4264
4265                         print format_extended_diff_header_line($patch_line, $diffinfo,
4266                                                                \%from, \%to);
4267                 }
4268                 print "</div>\n"; # class="diff extended_header"
4269
4270                 # from-file/to-file diff header
4271                 if (! $patch_line) {
4272                         print "</div>\n"; # class="patch"
4273                         last PATCH;
4274                 }
4275                 next PATCH if ($patch_line =~ m/^diff /);
4276                 #assert($patch_line =~ m/^---/) if DEBUG;
4277
4278                 my $last_patch_line = $patch_line;
4279                 $patch_line = <$fd>;
4280                 chomp $patch_line;
4281                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4282
4283                 print format_diff_from_to_header($last_patch_line, $patch_line,
4284                                                  $diffinfo, \%from, \%to,
4285                                                  @hash_parents);
4286
4287                 # the patch itself
4288         LINE:
4289                 while ($patch_line = <$fd>) {
4290                         chomp $patch_line;
4291
4292                         next PATCH if ($patch_line =~ m/^diff /);
4293
4294                         print format_diff_line($patch_line, \%from, \%to);
4295                 }
4296
4297         } continue {
4298                 print "</div>\n"; # class="patch"
4299         }
4300
4301         # for compact combined (--cc) format, with chunk and patch simpliciaction
4302         # patchset might be empty, but there might be unprocessed raw lines
4303         for (++$patch_idx if $patch_number > 0;
4304              $patch_idx < @$difftree;
4305              ++$patch_idx) {
4306                 # read and prepare patch information
4307                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4308
4309                 # generate anchor for "patch" links in difftree / whatchanged part
4310                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4311                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4312                       "</div>\n";  # class="patch"
4313
4314                 $patch_number++;
4315         }
4316
4317         if ($patch_number == 0) {
4318                 if (@hash_parents > 1) {
4319                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4320                 } else {
4321                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4322                 }
4323         }
4324
4325         print "</div>\n"; # class="patchset"
4326 }
4327
4328 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4329
4330 # fills project list info (age, description, owner, forks) for each
4331 # project in the list, removing invalid projects from returned list
4332 # NOTE: modifies $projlist, but does not remove entries from it
4333 sub fill_project_list_info {
4334         my ($projlist, $check_forks) = @_;
4335         my @projects;
4336
4337         my $show_ctags = gitweb_check_feature('ctags');
4338  PROJECT:
4339         foreach my $pr (@$projlist) {
4340                 my (@activity) = git_get_last_activity($pr->{'path'});
4341                 unless (@activity) {
4342                         next PROJECT;
4343                 }
4344                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4345                 if (!defined $pr->{'descr'}) {
4346                         my $descr = git_get_project_description($pr->{'path'}) || "";
4347                         $descr = to_utf8($descr);
4348                         $pr->{'descr_long'} = $descr;
4349                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4350                 }
4351                 if (!defined $pr->{'owner'}) {
4352                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4353                 }
4354                 if ($check_forks) {
4355                         my $pname = $pr->{'path'};
4356                         if (($pname =~ s/\.git$//) &&
4357                             ($pname !~ /\/$/) &&
4358                             (-d "$projectroot/$pname")) {
4359                                 $pr->{'forks'} = "-d $projectroot/$pname";
4360                         } else {
4361                                 $pr->{'forks'} = 0;
4362                         }
4363                 }
4364                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4365                 push @projects, $pr;
4366         }
4367
4368         return @projects;
4369 }
4370
4371 # print 'sort by' <th> element, generating 'sort by $name' replay link
4372 # if that order is not selected
4373 sub print_sort_th {
4374         print format_sort_th(@_);
4375 }
4376
4377 sub format_sort_th {
4378         my ($name, $order, $header) = @_;
4379         my $sort_th = "";
4380         $header ||= ucfirst($name);
4381
4382         if ($order eq $name) {
4383                 $sort_th .= "<th>$header</th>\n";
4384         } else {
4385                 $sort_th .= "<th>" .
4386                             $cgi->a({-href => href(-replay=>1, order=>$name),
4387                                      -class => "header"}, $header) .
4388                             "</th>\n";
4389         }
4390
4391         return $sort_th;
4392 }
4393
4394 sub git_project_list_body {
4395         # actually uses global variable $project
4396         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4397
4398         my $check_forks = gitweb_check_feature('forks');
4399         my @projects = fill_project_list_info($projlist, $check_forks);
4400
4401         $order ||= $default_projects_order;
4402         $from = 0 unless defined $from;
4403         $to = $#projects if (!defined $to || $#projects < $to);
4404
4405         my %order_info = (
4406                 project => { key => 'path', type => 'str' },
4407                 descr => { key => 'descr_long', type => 'str' },
4408                 owner => { key => 'owner', type => 'str' },
4409                 age => { key => 'age', type => 'num' }
4410         );
4411         my $oi = $order_info{$order};
4412         if ($oi->{'type'} eq 'str') {
4413                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4414         } else {
4415                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4416         }
4417
4418         my $show_ctags = gitweb_check_feature('ctags');
4419         if ($show_ctags) {
4420                 my %ctags;
4421                 foreach my $p (@projects) {
4422                         foreach my $ct (keys %{$p->{'ctags'}}) {
4423                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4424                         }
4425                 }
4426                 my $cloud = git_populate_project_tagcloud(\%ctags);
4427                 print git_show_project_tagcloud($cloud, 64);
4428         }
4429
4430         print "<table class=\"project_list\">\n";
4431         unless ($no_header) {
4432                 print "<tr>\n";
4433                 if ($check_forks) {
4434                         print "<th></th>\n";
4435                 }
4436                 print_sort_th('project', $order, 'Project');
4437                 print_sort_th('descr', $order, 'Description');
4438                 print_sort_th('owner', $order, 'Owner');
4439                 print_sort_th('age', $order, 'Last Change');
4440                 print "<th></th>\n" . # for links
4441                       "</tr>\n";
4442         }
4443         my $alternate = 1;
4444         my $tagfilter = $cgi->param('by_tag');
4445         for (my $i = $from; $i <= $to; $i++) {
4446                 my $pr = $projects[$i];
4447
4448                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4449                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4450                         and not $pr->{'descr_long'} =~ /$searchtext/;
4451                 # Weed out forks or non-matching entries of search
4452                 if ($check_forks) {
4453                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4454                         $forkbase="^$forkbase" if $forkbase;
4455                         next if not $searchtext and not $tagfilter and $show_ctags
4456                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4457                 }
4458
4459                 if ($alternate) {
4460                         print "<tr class=\"dark\">\n";
4461                 } else {
4462                         print "<tr class=\"light\">\n";
4463                 }
4464                 $alternate ^= 1;
4465                 if ($check_forks) {
4466                         print "<td>";
4467                         if ($pr->{'forks'}) {
4468                                 print "<!-- $pr->{'forks'} -->\n";
4469                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4470                         }
4471                         print "</td>\n";
4472                 }
4473                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4474                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4475                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4476                                         -class => "list", -title => $pr->{'descr_long'}},
4477                                         esc_html($pr->{'descr'})) . "</td>\n" .
4478                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4479                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4480                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4481                       "<td class=\"link\">" .
4482                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4483                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4484                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4485                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4486                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4487                       "</td>\n" .
4488                       "</tr>\n";
4489         }
4490         if (defined $extra) {
4491                 print "<tr>\n";
4492                 if ($check_forks) {
4493                         print "<td></td>\n";
4494                 }
4495                 print "<td colspan=\"5\">$extra</td>\n" .
4496                       "</tr>\n";
4497         }
4498         print "</table>\n";
4499 }
4500
4501 sub git_log_body {
4502         # uses global variable $project
4503         my ($commitlist, $from, $to, $refs, $extra) = @_;
4504
4505         $from = 0 unless defined $from;
4506         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4507
4508         for (my $i = 0; $i <= $to; $i++) {
4509                 my %co = %{$commitlist->[$i]};
4510                 next if !%co;
4511                 my $commit = $co{'id'};
4512                 my $ref = format_ref_marker($refs, $commit);
4513                 my %ad = parse_date($co{'author_epoch'});
4514                 git_print_header_div('commit',
4515                                "<span class=\"age\">$co{'age_string'}</span>" .
4516                                esc_html($co{'title'}) . $ref,
4517                                $commit);
4518                 print "<div class=\"title_text\">\n" .
4519                       "<div class=\"log_link\">\n" .
4520                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4521                       " | " .
4522                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4523                       " | " .
4524                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4525                       "<br/>\n" .
4526                       "</div>\n";
4527                       git_print_authorship(\%co, -tag => 'span');
4528                       print "<br/>\n</div>\n";
4529
4530                 print "<div class=\"log_body\">\n";
4531                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4532                 print "</div>\n";
4533         }
4534         if ($extra) {
4535                 print "<div class=\"page_nav\">\n";
4536                 print "$extra\n";
4537                 print "</div>\n";
4538         }
4539 }
4540
4541 sub git_shortlog_body {
4542         # uses global variable $project
4543         my ($commitlist, $from, $to, $refs, $extra) = @_;
4544
4545         $from = 0 unless defined $from;
4546         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4547
4548         print "<table class=\"shortlog\">\n";
4549         my $alternate = 1;
4550         for (my $i = $from; $i <= $to; $i++) {
4551                 my %co = %{$commitlist->[$i]};
4552                 my $commit = $co{'id'};
4553                 my $ref = format_ref_marker($refs, $commit);
4554                 if ($alternate) {
4555                         print "<tr class=\"dark\">\n";
4556                 } else {
4557                         print "<tr class=\"light\">\n";
4558                 }
4559                 $alternate ^= 1;
4560                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4561                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4562                       format_author_html('td', \%co, 10) . "<td>";
4563                 print format_subject_html($co{'title'}, $co{'title_short'},
4564                                           href(action=>"commit", hash=>$commit), $ref);
4565                 print "</td>\n" .
4566                       "<td class=\"link\">" .
4567                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4568                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4569                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4570                 my $snapshot_links = format_snapshot_links($commit);
4571                 if (defined $snapshot_links) {
4572                         print " | " . $snapshot_links;
4573                 }
4574                 print "</td>\n" .
4575                       "</tr>\n";
4576         }
4577         if (defined $extra) {
4578                 print "<tr>\n" .
4579                       "<td colspan=\"4\">$extra</td>\n" .
4580                       "</tr>\n";
4581         }
4582         print "</table>\n";
4583 }
4584
4585 sub git_history_body {
4586         # Warning: assumes constant type (blob or tree) during history
4587         my ($commitlist, $from, $to, $refs, $extra,
4588             $file_name, $file_hash, $ftype) = @_;
4589
4590         $from = 0 unless defined $from;
4591         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4592
4593         print "<table class=\"history\">\n";
4594         my $alternate = 1;
4595         for (my $i = $from; $i <= $to; $i++) {
4596                 my %co = %{$commitlist->[$i]};
4597                 if (!%co) {
4598                         next;
4599                 }
4600                 my $commit = $co{'id'};
4601
4602                 my $ref = format_ref_marker($refs, $commit);
4603
4604                 if ($alternate) {
4605                         print "<tr class=\"dark\">\n";
4606                 } else {
4607                         print "<tr class=\"light\">\n";
4608                 }
4609                 $alternate ^= 1;
4610                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4611         # shortlog:   format_author_html('td', \%co, 10)
4612                       format_author_html('td', \%co, 15, 3) . "<td>";
4613                 # originally git_history used chop_str($co{'title'}, 50)
4614                 print format_subject_html($co{'title'}, $co{'title_short'},
4615                                           href(action=>"commit", hash=>$commit), $ref);
4616                 print "</td>\n" .
4617                       "<td class=\"link\">" .
4618                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4619                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4620
4621                 if ($ftype eq 'blob') {
4622                         my $blob_current = $file_hash;
4623                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4624                         if (defined $blob_current && defined $blob_parent &&
4625                                         $blob_current ne $blob_parent) {
4626                                 print " | " .
4627                                         $cgi->a({-href => href(action=>"blobdiff",
4628                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4629                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4630                                                                file_name=>$file_name)},
4631                                                 "diff to current");
4632                         }
4633                 }
4634                 print "</td>\n" .
4635                       "</tr>\n";
4636         }
4637         if (defined $extra) {
4638                 print "<tr>\n" .
4639                       "<td colspan=\"4\">$extra</td>\n" .
4640                       "</tr>\n";
4641         }
4642         print "</table>\n";
4643 }
4644
4645 sub git_tags_body {
4646         # uses global variable $project
4647         my ($taglist, $from, $to, $extra) = @_;
4648         $from = 0 unless defined $from;
4649         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4650
4651         print "<table class=\"tags\">\n";
4652         my $alternate = 1;
4653         for (my $i = $from; $i <= $to; $i++) {
4654                 my $entry = $taglist->[$i];
4655                 my %tag = %$entry;
4656                 my $comment = $tag{'subject'};
4657                 my $comment_short;
4658                 if (defined $comment) {
4659                         $comment_short = chop_str($comment, 30, 5);
4660                 }
4661                 if ($alternate) {
4662                         print "<tr class=\"dark\">\n";
4663                 } else {
4664                         print "<tr class=\"light\">\n";
4665                 }
4666                 $alternate ^= 1;
4667                 if (defined $tag{'age'}) {
4668                         print "<td><i>$tag{'age'}</i></td>\n";
4669                 } else {
4670                         print "<td></td>\n";
4671                 }
4672                 print "<td>" .
4673                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4674                                -class => "list name"}, esc_html($tag{'name'})) .
4675                       "</td>\n" .
4676                       "<td>";
4677                 if (defined $comment) {
4678                         print format_subject_html($comment, $comment_short,
4679                                                   href(action=>"tag", hash=>$tag{'id'}));
4680                 }
4681                 print "</td>\n" .
4682                       "<td class=\"selflink\">";
4683                 if ($tag{'type'} eq "tag") {
4684                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4685                 } else {
4686                         print "&nbsp;";
4687                 }
4688                 print "</td>\n" .
4689                       "<td class=\"link\">" . " | " .
4690                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4691                 if ($tag{'reftype'} eq "commit") {
4692                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4693                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4694                 } elsif ($tag{'reftype'} eq "blob") {
4695                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4696                 }
4697                 print "</td>\n" .
4698                       "</tr>";
4699         }
4700         if (defined $extra) {
4701                 print "<tr>\n" .
4702                       "<td colspan=\"5\">$extra</td>\n" .
4703                       "</tr>\n";
4704         }
4705         print "</table>\n";
4706 }
4707
4708 sub git_heads_body {
4709         # uses global variable $project
4710         my ($headlist, $head, $from, $to, $extra) = @_;
4711         $from = 0 unless defined $from;
4712         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4713
4714         print "<table class=\"heads\">\n";
4715         my $alternate = 1;
4716         for (my $i = $from; $i <= $to; $i++) {
4717                 my $entry = $headlist->[$i];
4718                 my %ref = %$entry;
4719                 my $curr = $ref{'id'} eq $head;
4720                 if ($alternate) {
4721                         print "<tr class=\"dark\">\n";
4722                 } else {
4723                         print "<tr class=\"light\">\n";
4724                 }
4725                 $alternate ^= 1;
4726                 print "<td><i>$ref{'age'}</i></td>\n" .
4727                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4728                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4729                                -class => "list name"},esc_html($ref{'name'})) .
4730                       "</td>\n" .
4731                       "<td class=\"link\">" .
4732                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4733                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4734                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4735                       "</td>\n" .
4736                       "</tr>";
4737         }
4738         if (defined $extra) {
4739                 print "<tr>\n" .
4740                       "<td colspan=\"3\">$extra</td>\n" .
4741                       "</tr>\n";
4742         }
4743         print "</table>\n";
4744 }
4745
4746 sub git_search_grep_body {
4747         my ($commitlist, $from, $to, $extra) = @_;
4748         $from = 0 unless defined $from;
4749         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4750
4751         print "<table class=\"commit_search\">\n";
4752         my $alternate = 1;
4753         for (my $i = $from; $i <= $to; $i++) {
4754                 my %co = %{$commitlist->[$i]};
4755                 if (!%co) {
4756                         next;
4757                 }
4758                 my $commit = $co{'id'};
4759                 if ($alternate) {
4760                         print "<tr class=\"dark\">\n";
4761                 } else {
4762                         print "<tr class=\"light\">\n";
4763                 }
4764                 $alternate ^= 1;
4765                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4766                       format_author_html('td', \%co, 15, 5) .
4767                       "<td>" .
4768                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4769                                -class => "list subject"},
4770                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4771                 my $comment = $co{'comment'};
4772                 foreach my $line (@$comment) {
4773                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4774                                 my ($lead, $match, $trail) = ($1, $2, $3);
4775                                 $match = chop_str($match, 70, 5, 'center');
4776                                 my $contextlen = int((80 - length($match))/2);
4777                                 $contextlen = 30 if ($contextlen > 30);
4778                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4779                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4780
4781                                 $lead  = esc_html($lead);
4782                                 $match = esc_html($match);
4783                                 $trail = esc_html($trail);
4784
4785                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4786                         }
4787                 }
4788                 print "</td>\n" .
4789                       "<td class=\"link\">" .
4790                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4791                       " | " .
4792                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4793                       " | " .
4794                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4795                 print "</td>\n" .
4796                       "</tr>\n";
4797         }
4798         if (defined $extra) {
4799                 print "<tr>\n" .
4800                       "<td colspan=\"3\">$extra</td>\n" .
4801                       "</tr>\n";
4802         }
4803         print "</table>\n";
4804 }
4805
4806 ## ======================================================================
4807 ## ======================================================================
4808 ## actions
4809
4810 sub git_project_list {
4811         my $order = $input_params{'order'};
4812         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4813                 die_error(400, "Unknown order parameter");
4814         }
4815
4816         my @list = git_get_projects_list();
4817         if (!@list) {
4818                 die_error(404, "No projects found");
4819         }
4820
4821         git_header_html();
4822         if (defined $home_text && -f $home_text) {
4823                 print "<div class=\"index_include\">\n";
4824                 insert_file($home_text);
4825                 print "</div>\n";
4826         }
4827         print $cgi->startform(-method => "get") .
4828               "<p class=\"projsearch\">Search:\n" .
4829               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4830               "</p>" .
4831               $cgi->end_form() . "\n";
4832         git_project_list_body(\@list, $order);
4833         git_footer_html();
4834 }
4835
4836 sub git_forks {
4837         my $order = $input_params{'order'};
4838         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4839                 die_error(400, "Unknown order parameter");
4840         }
4841
4842         my @list = git_get_projects_list($project);
4843         if (!@list) {
4844                 die_error(404, "No forks found");
4845         }
4846
4847         git_header_html();
4848         git_print_page_nav('','');
4849         git_print_header_div('summary', "$project forks");
4850         git_project_list_body(\@list, $order);
4851         git_footer_html();
4852 }
4853
4854 sub git_project_index {
4855         my @projects = git_get_projects_list($project);
4856
4857         print $cgi->header(
4858                 -type => 'text/plain',
4859                 -charset => 'utf-8',
4860                 -content_disposition => 'inline; filename="index.aux"');
4861
4862         foreach my $pr (@projects) {
4863                 if (!exists $pr->{'owner'}) {
4864                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4865                 }
4866
4867                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4868                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4869                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4870                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4871                 $path  =~ s/ /\+/g;
4872                 $owner =~ s/ /\+/g;
4873
4874                 print "$path $owner\n";
4875         }
4876 }
4877
4878 sub git_summary {
4879         my $descr = git_get_project_description($project) || "none";
4880         my %co = parse_commit("HEAD");
4881         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4882         my $head = $co{'id'};
4883
4884         my $owner = git_get_project_owner($project);
4885
4886         my $refs = git_get_references();
4887         # These get_*_list functions return one more to allow us to see if
4888         # there are more ...
4889         my @taglist  = git_get_tags_list(16);
4890         my @headlist = git_get_heads_list(16);
4891         my @forklist;
4892         my $check_forks = gitweb_check_feature('forks');
4893
4894         if ($check_forks) {
4895                 @forklist = git_get_projects_list($project);
4896         }
4897
4898         git_header_html();
4899         git_print_page_nav('summary','', $head);
4900
4901         print "<div class=\"title\">&nbsp;</div>\n";
4902         print "<table class=\"projects_list\">\n" .
4903               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4904               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4905         if (defined $cd{'rfc2822'}) {
4906                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4907         }
4908
4909         # use per project git URL list in $projectroot/$project/cloneurl
4910         # or make project git URL from git base URL and project name
4911         my $url_tag = "URL";
4912         my @url_list = git_get_project_url_list($project);
4913         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4914         foreach my $git_url (@url_list) {
4915                 next unless $git_url;
4916                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4917                 $url_tag = "";
4918         }
4919
4920         # Tag cloud
4921         my $show_ctags = gitweb_check_feature('ctags');
4922         if ($show_ctags) {
4923                 my $ctags = git_get_project_ctags($project);
4924                 my $cloud = git_populate_project_tagcloud($ctags);
4925                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4926                 print "</td>\n<td>" unless %$ctags;
4927                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4928                 print "</td>\n<td>" if %$ctags;
4929                 print git_show_project_tagcloud($cloud, 48);
4930                 print "</td></tr>";
4931         }
4932
4933         print "</table>\n";
4934
4935         # If XSS prevention is on, we don't include README.html.
4936         # TODO: Allow a readme in some safe format.
4937         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4938                 print "<div class=\"title\">readme</div>\n" .
4939                       "<div class=\"readme\">\n";
4940                 insert_file("$projectroot/$project/README.html");
4941                 print "\n</div>\n"; # class="readme"
4942         }
4943
4944         # we need to request one more than 16 (0..15) to check if
4945         # those 16 are all
4946         my @commitlist = $head ? parse_commits($head, 17) : ();
4947         if (@commitlist) {
4948                 git_print_header_div('shortlog');
4949                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4950                                   $#commitlist <=  15 ? undef :
4951                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4952         }
4953
4954         if (@taglist) {
4955                 git_print_header_div('tags');
4956                 git_tags_body(\@taglist, 0, 15,
4957                               $#taglist <=  15 ? undef :
4958                               $cgi->a({-href => href(action=>"tags")}, "..."));
4959         }
4960
4961         if (@headlist) {
4962                 git_print_header_div('heads');
4963                 git_heads_body(\@headlist, $head, 0, 15,
4964                                $#headlist <= 15 ? undef :
4965                                $cgi->a({-href => href(action=>"heads")}, "..."));
4966         }
4967
4968         if (@forklist) {
4969                 git_print_header_div('forks');
4970                 git_project_list_body(\@forklist, 'age', 0, 15,
4971                                       $#forklist <= 15 ? undef :
4972                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4973                                       'no_header');
4974         }
4975
4976         git_footer_html();
4977 }
4978
4979 sub git_tag {
4980         my $head = git_get_head_hash($project);
4981         git_header_html();
4982         git_print_page_nav('','', $head,undef,$head);
4983         my %tag = parse_tag($hash);
4984
4985         if (! %tag) {
4986                 die_error(404, "Unknown tag object");
4987         }
4988
4989         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4990         print "<div class=\"title_text\">\n" .
4991               "<table class=\"object_header\">\n" .
4992               "<tr>\n" .
4993               "<td>object</td>\n" .
4994               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4995                                $tag{'object'}) . "</td>\n" .
4996               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4997                                               $tag{'type'}) . "</td>\n" .
4998               "</tr>\n";
4999         if (defined($tag{'author'})) {
5000                 git_print_authorship_rows(\%tag, 'author');
5001         }
5002         print "</table>\n\n" .
5003               "</div>\n";
5004         print "<div class=\"page_body\">";
5005         my $comment = $tag{'comment'};
5006         foreach my $line (@$comment) {
5007                 chomp $line;
5008                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5009         }
5010         print "</div>\n";
5011         git_footer_html();
5012 }
5013
5014 sub git_blame_common {
5015         my $format = shift || 'porcelain';
5016         if ($format eq 'porcelain' && $cgi->param('js')) {
5017                 $format = 'incremental';
5018                 $action = 'blame_incremental'; # for page title etc
5019         }
5020
5021         # permissions
5022         gitweb_check_feature('blame')
5023                 or die_error(403, "Blame view not allowed");
5024
5025         # error checking
5026         die_error(400, "No file name given") unless $file_name;
5027         $hash_base ||= git_get_head_hash($project);
5028         die_error(404, "Couldn't find base commit") unless $hash_base;
5029         my %co = parse_commit($hash_base)
5030                 or die_error(404, "Commit not found");
5031         my $ftype = "blob";
5032         if (!defined $hash) {
5033                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5034                         or die_error(404, "Error looking up file");
5035         } else {
5036                 $ftype = git_get_type($hash);
5037                 if ($ftype !~ "blob") {
5038                         die_error(400, "Object is not a blob");
5039                 }
5040         }
5041
5042         my $fd;
5043         if ($format eq 'incremental') {
5044                 # get file contents (as base)
5045                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5046                         or die_error(500, "Open git-cat-file failed");
5047         } elsif ($format eq 'data') {
5048                 # run git-blame --incremental
5049                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5050                         $hash_base, "--", $file_name
5051                         or die_error(500, "Open git-blame --incremental failed");
5052         } else {
5053                 # run git-blame --porcelain
5054                 open $fd, "-|", git_cmd(), "blame", '-p',
5055                         $hash_base, '--', $file_name
5056                         or die_error(500, "Open git-blame --porcelain failed");
5057         }
5058
5059         # incremental blame data returns early
5060         if ($format eq 'data') {
5061                 print $cgi->header(
5062                         -type=>"text/plain", -charset => "utf-8",
5063                         -status=> "200 OK");
5064                 local $| = 1; # output autoflush
5065                 print while <$fd>;
5066                 close $fd
5067                         or print "ERROR $!\n";
5068
5069                 print 'END';
5070                 if (defined $t0 && gitweb_check_feature('timed')) {
5071                         print ' '.
5072                               Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
5073                               ' '.$number_of_git_cmds;
5074                 }
5075                 print "\n";
5076
5077                 return;
5078         }
5079
5080         # page header
5081         git_header_html();
5082         my $formats_nav =
5083                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5084                         "blob") .
5085                 " | ";
5086         if ($format eq 'incremental') {
5087                 $formats_nav .=
5088                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5089                                 "blame") . " (non-incremental)";
5090         } else {
5091                 $formats_nav .=
5092                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5093                                 "blame") . " (incremental)";
5094         }
5095         $formats_nav .=
5096                 " | " .
5097                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5098                         "history") .
5099                 " | " .
5100                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5101                         "HEAD");
5102         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5103         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5104         git_print_page_path($file_name, $ftype, $hash_base);
5105
5106         # page body
5107         if ($format eq 'incremental') {
5108                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5109                       "This page requires JavaScript to run.\n Use ".
5110                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5111                               'this page').
5112                       " instead.\n".
5113                       "</b></center></div>\n</noscript>\n";
5114
5115                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5116         }
5117
5118         print qq!<div class="page_body">\n!;
5119         print qq!<div id="progress_info">... / ...</div>\n!
5120                 if ($format eq 'incremental');
5121         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5122               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5123               qq!<thead>\n!.
5124               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5125               qq!</thead>\n!.
5126               qq!<tbody>\n!;
5127
5128         my @rev_color = qw(light dark);
5129         my $num_colors = scalar(@rev_color);
5130         my $current_color = 0;
5131
5132         if ($format eq 'incremental') {
5133                 my $color_class = $rev_color[$current_color];
5134
5135                 #contents of a file
5136                 my $linenr = 0;
5137         LINE:
5138                 while (my $line = <$fd>) {
5139                         chomp $line;
5140                         $linenr++;
5141
5142                         print qq!<tr id="l$linenr" class="$color_class">!.
5143                               qq!<td class="sha1"><a href=""> </a></td>!.
5144                               qq!<td class="linenr">!.
5145                               qq!<a class="linenr" href="">$linenr</a></td>!;
5146                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5147                         print qq!</tr>\n!;
5148                 }
5149
5150         } else { # porcelain, i.e. ordinary blame
5151                 my %metainfo = (); # saves information about commits
5152
5153                 # blame data
5154         LINE:
5155                 while (my $line = <$fd>) {
5156                         chomp $line;
5157                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5158                         # no <lines in group> for subsequent lines in group of lines
5159                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5160                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5161                         if (!exists $metainfo{$full_rev}) {
5162                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5163                         }
5164                         my $meta = $metainfo{$full_rev};
5165                         my $data;
5166                         while ($data = <$fd>) {
5167                                 chomp $data;
5168                                 last if ($data =~ s/^\t//); # contents of line
5169                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5170                                         $meta->{$1} = $2 unless exists $meta->{$1};
5171                                 }
5172                                 if ($data =~ /^previous /) {
5173                                         $meta->{'nprevious'}++;
5174                                 }
5175                         }
5176                         my $short_rev = substr($full_rev, 0, 8);
5177                         my $author = $meta->{'author'};
5178                         my %date =
5179                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5180                         my $date = $date{'iso-tz'};
5181                         if ($group_size) {
5182                                 $current_color = ($current_color + 1) % $num_colors;
5183                         }
5184                         my $tr_class = $rev_color[$current_color];
5185                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5186                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5187                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5188                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5189                         if ($group_size) {
5190                                 print "<td class=\"sha1\"";
5191                                 print " title=\"". esc_html($author) . ", $date\"";
5192                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5193                                 print ">";
5194                                 print $cgi->a({-href => href(action=>"commit",
5195                                                              hash=>$full_rev,
5196                                                              file_name=>$file_name)},
5197                                               esc_html($short_rev));
5198                                 if ($group_size >= 2) {
5199                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5200                                         if (@author_initials) {
5201                                                 print "<br />" .
5202                                                       esc_html(join('', @author_initials));
5203                                                 #           or join('.', ...)
5204                                         }
5205                                 }
5206                                 print "</td>\n";
5207                         }
5208                         # 'previous' <sha1 of parent commit> <filename at commit>
5209                         if (exists $meta->{'previous'} &&
5210                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5211                                 $meta->{'parent'} = $1;
5212                                 $meta->{'file_parent'} = unquote($2);
5213                         }
5214                         my $linenr_commit =
5215                                 exists($meta->{'parent'}) ?
5216                                 $meta->{'parent'} : $full_rev;
5217                         my $linenr_filename =
5218                                 exists($meta->{'file_parent'}) ?
5219                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5220                         my $blamed = href(action => 'blame',
5221                                           file_name => $linenr_filename,
5222                                           hash_base => $linenr_commit);
5223                         print "<td class=\"linenr\">";
5224                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5225                                         -class => "linenr" },
5226                                       esc_html($lineno));
5227                         print "</td>";
5228                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5229                         print "</tr>\n";
5230                 } # end while
5231
5232         }
5233
5234         # footer
5235         print "</tbody>\n".
5236               "</table>\n"; # class="blame"
5237         print "</div>\n";   # class="blame_body"
5238         close $fd
5239                 or print "Reading blob failed\n";
5240
5241         git_footer_html();
5242 }
5243
5244 sub git_blame {
5245         git_blame_common();
5246 }
5247
5248 sub git_blame_incremental {
5249         git_blame_common('incremental');
5250 }
5251
5252 sub git_blame_data {
5253         git_blame_common('data');
5254 }
5255
5256 sub git_tags {
5257         my $head = git_get_head_hash($project);
5258         git_header_html();
5259         git_print_page_nav('','', $head,undef,$head);
5260         git_print_header_div('summary', $project);
5261
5262         my @tagslist = git_get_tags_list();
5263         if (@tagslist) {
5264                 git_tags_body(\@tagslist);
5265         }
5266         git_footer_html();
5267 }
5268
5269 sub git_heads {
5270         my $head = git_get_head_hash($project);
5271         git_header_html();
5272         git_print_page_nav('','', $head,undef,$head);
5273         git_print_header_div('summary', $project);
5274
5275         my @headslist = git_get_heads_list();
5276         if (@headslist) {
5277                 git_heads_body(\@headslist, $head);
5278         }
5279         git_footer_html();
5280 }
5281
5282 sub git_blob_plain {
5283         my $type = shift;
5284         my $expires;
5285
5286         if (!defined $hash) {
5287                 if (defined $file_name) {
5288                         my $base = $hash_base || git_get_head_hash($project);
5289                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5290                                 or die_error(404, "Cannot find file");
5291                 } else {
5292                         die_error(400, "No file name defined");
5293                 }
5294         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5295                 # blobs defined by non-textual hash id's can be cached
5296                 $expires = "+1d";
5297         }
5298
5299         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5300                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5301
5302         # content-type (can include charset)
5303         $type = blob_contenttype($fd, $file_name, $type);
5304
5305         # "save as" filename, even when no $file_name is given
5306         my $save_as = "$hash";
5307         if (defined $file_name) {
5308                 $save_as = $file_name;
5309         } elsif ($type =~ m/^text\//) {
5310                 $save_as .= '.txt';
5311         }
5312
5313         # With XSS prevention on, blobs of all types except a few known safe
5314         # ones are served with "Content-Disposition: attachment" to make sure
5315         # they don't run in our security domain.  For certain image types,
5316         # blob view writes an <img> tag referring to blob_plain view, and we
5317         # want to be sure not to break that by serving the image as an
5318         # attachment (though Firefox 3 doesn't seem to care).
5319         my $sandbox = $prevent_xss &&
5320                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5321
5322         print $cgi->header(
5323                 -type => $type,
5324                 -expires => $expires,
5325                 -content_disposition =>
5326                         ($sandbox ? 'attachment' : 'inline')
5327                         . '; filename="' . $save_as . '"');
5328         local $/ = undef;
5329         binmode STDOUT, ':raw';
5330         print <$fd>;
5331         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5332         close $fd;
5333 }
5334
5335 sub git_blob {
5336         my $expires;
5337
5338         if (!defined $hash) {
5339                 if (defined $file_name) {
5340                         my $base = $hash_base || git_get_head_hash($project);
5341                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5342                                 or die_error(404, "Cannot find file");
5343                 } else {
5344                         die_error(400, "No file name defined");
5345                 }
5346         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5347                 # blobs defined by non-textual hash id's can be cached
5348                 $expires = "+1d";
5349         }
5350
5351         my $have_blame = gitweb_check_feature('blame');
5352         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5353                 or die_error(500, "Couldn't cat $file_name, $hash");
5354         my $mimetype = blob_mimetype($fd, $file_name);
5355         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5356                 close $fd;
5357                 return git_blob_plain($mimetype);
5358         }
5359         # we can have blame only for text/* mimetype
5360         $have_blame &&= ($mimetype =~ m!^text/!);
5361
5362         git_header_html(undef, $expires);
5363         my $formats_nav = '';
5364         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5365                 if (defined $file_name) {
5366                         if ($have_blame) {
5367                                 $formats_nav .=
5368                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5369                                                 "blame") .
5370                                         " | ";
5371                         }
5372                         $formats_nav .=
5373                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5374                                         "history") .
5375                                 " | " .
5376                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5377                                         "raw") .
5378                                 " | " .
5379                                 $cgi->a({-href => href(action=>"blob",
5380                                                        hash_base=>"HEAD", file_name=>$file_name)},
5381                                         "HEAD");
5382                 } else {
5383                         $formats_nav .=
5384                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5385                                         "raw");
5386                 }
5387                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5388                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5389         } else {
5390                 print "<div class=\"page_nav\">\n" .
5391                       "<br/><br/></div>\n" .
5392                       "<div class=\"title\">".esc_html($hash)."</div>\n";
5393         }
5394         git_print_page_path($file_name, "blob", $hash_base);
5395         print "<div class=\"page_body\">\n";
5396         if ($mimetype =~ m!^image/!) {
5397                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
5398                 if ($file_name) {
5399                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
5400                 }
5401                 print qq! src="! .
5402                       href(action=>"blob_plain", hash=>$hash,
5403                            hash_base=>$hash_base, file_name=>$file_name) .
5404                       qq!" />\n!;
5405         } else {
5406                 my $nr;
5407                 while (my $line = <$fd>) {
5408                         chomp $line;
5409                         $nr++;
5410                         $line = untabify($line);
5411                         printf "<div class=\"pre\"><a id=\"l%i\" href=\""
5412                                 . esc_attr(href(-replay => 1))
5413                                 . "#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
5414                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
5415                 }
5416         }
5417         close $fd
5418                 or print "Reading blob failed.\n";
5419         print "</div>";
5420         git_footer_html();
5421 }
5422
5423 sub git_tree {
5424         if (!defined $hash_base) {
5425                 $hash_base = "HEAD";
5426         }
5427         if (!defined $hash) {
5428                 if (defined $file_name) {
5429                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5430                 } else {
5431                         $hash = $hash_base;
5432                 }
5433         }
5434         die_error(404, "No such tree") unless defined($hash);
5435
5436         my $show_sizes = gitweb_check_feature('show-sizes');
5437         my $have_blame = gitweb_check_feature('blame');
5438
5439         my @entries = ();
5440         {
5441                 local $/ = "\0";
5442                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5443                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5444                         or die_error(500, "Open git-ls-tree failed");
5445                 @entries = map { chomp; $_ } <$fd>;
5446                 close $fd
5447                         or die_error(404, "Reading tree failed");
5448         }
5449
5450         my $refs = git_get_references();
5451         my $ref = format_ref_marker($refs, $hash_base);
5452         git_header_html();
5453         my $basedir = '';
5454         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5455                 my @views_nav = ();
5456                 if (defined $file_name) {
5457                         push @views_nav,
5458                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5459                                         "history"),
5460                                 $cgi->a({-href => href(action=>"tree",
5461                                                        hash_base=>"HEAD", file_name=>$file_name)},
5462                                         "HEAD"),
5463                 }
5464                 my $snapshot_links = format_snapshot_links($hash);
5465                 if (defined $snapshot_links) {
5466                         # FIXME: Should be available when we have no hash base as well.
5467                         push @views_nav, $snapshot_links;
5468                 }
5469                 git_print_page_nav('tree','', $hash_base, undef, undef,
5470                                    join(' | ', @views_nav));
5471                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5472         } else {
5473                 undef $hash_base;
5474                 print "<div class=\"page_nav\">\n";
5475                 print "<br/><br/></div>\n";
5476                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
5477         }
5478         if (defined $file_name) {
5479                 $basedir = $file_name;
5480                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5481                         $basedir .= '/';
5482                 }
5483                 git_print_page_path($file_name, 'tree', $hash_base);
5484         }
5485         print "<div class=\"page_body\">\n";
5486         print "<table class=\"tree\">\n";
5487         my $alternate = 1;
5488         # '..' (top directory) link if possible
5489         if (defined $hash_base &&
5490             defined $file_name && $file_name =~ m![^/]+$!) {
5491                 if ($alternate) {
5492                         print "<tr class=\"dark\">\n";
5493                 } else {
5494                         print "<tr class=\"light\">\n";
5495                 }
5496                 $alternate ^= 1;
5497
5498                 my $up = $file_name;
5499                 $up =~ s!/?[^/]+$!!;
5500                 undef $up unless $up;
5501                 # based on git_print_tree_entry
5502                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5503                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5504                 print '<td class="list">';
5505                 print $cgi->a({-href => href(action=>"tree",
5506                                              hash_base=>$hash_base,
5507                                              file_name=>$up)},
5508                               "..");
5509                 print "</td>\n";
5510                 print "<td class=\"link\"></td>\n";
5511
5512                 print "</tr>\n";
5513         }
5514         foreach my $line (@entries) {
5515                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5516
5517                 if ($alternate) {
5518                         print "<tr class=\"dark\">\n";
5519                 } else {
5520                         print "<tr class=\"light\">\n";
5521                 }
5522                 $alternate ^= 1;
5523
5524                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5525
5526                 print "</tr>\n";
5527         }
5528         print "</table>\n" .
5529               "</div>";
5530         git_footer_html();
5531 }
5532
5533 sub snapshot_name {
5534         my ($project, $hash) = @_;
5535
5536         # path/to/project.git  -> project
5537         # path/to/project/.git -> project
5538         my $name = to_utf8($project);
5539         $name =~ s,([^/])/*\.git$,$1,;
5540         $name = basename($name);
5541         # sanitize name
5542         $name =~ s/[[:cntrl:]]/?/g;
5543
5544         my $ver = $hash;
5545         if ($hash =~ /^[0-9a-fA-F]+$/) {
5546                 # shorten SHA-1 hash
5547                 my $full_hash = git_get_full_hash($project, $hash);
5548                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
5549                         $ver = git_get_short_hash($project, $hash);
5550                 }
5551         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
5552                 # tags don't need shortened SHA-1 hash
5553                 $ver = $1;
5554         } else {
5555                 # branches and other need shortened SHA-1 hash
5556                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
5557                         $ver = $1;
5558                 }
5559                 $ver .= '-' . git_get_short_hash($project, $hash);
5560         }
5561         # in case of hierarchical branch names
5562         $ver =~ s!/!.!g;
5563
5564         # name = project-version_string
5565         $name = "$name-$ver";
5566
5567         return wantarray ? ($name, $name) : $name;
5568 }
5569
5570 sub git_snapshot {
5571         my $format = $input_params{'snapshot_format'};
5572         if (!@snapshot_fmts) {
5573                 die_error(403, "Snapshots not allowed");
5574         }
5575         # default to first supported snapshot format
5576         $format ||= $snapshot_fmts[0];
5577         if ($format !~ m/^[a-z0-9]+$/) {
5578                 die_error(400, "Invalid snapshot format parameter");
5579         } elsif (!exists($known_snapshot_formats{$format})) {
5580                 die_error(400, "Unknown snapshot format");
5581         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5582                 die_error(403, "Snapshot format not allowed");
5583         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5584                 die_error(403, "Unsupported snapshot format");
5585         }
5586
5587         my $type = git_get_type("$hash^{}");
5588         if (!$type) {
5589                 die_error(404, 'Object does not exist');
5590         }  elsif ($type eq 'blob') {
5591                 die_error(400, 'Object is not a tree-ish');
5592         }
5593
5594         my ($name, $prefix) = snapshot_name($project, $hash);
5595         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
5596         my $cmd = quote_command(
5597                 git_cmd(), 'archive',
5598                 "--format=$known_snapshot_formats{$format}{'format'}",
5599                 "--prefix=$prefix/", $hash);
5600         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5601                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5602         }
5603
5604         $filename =~ s/(["\\])/\\$1/g;
5605         print $cgi->header(
5606                 -type => $known_snapshot_formats{$format}{'type'},
5607                 -content_disposition => 'inline; filename="' . $filename . '"',
5608                 -status => '200 OK');
5609
5610         open my $fd, "-|", $cmd
5611                 or die_error(500, "Execute git-archive failed");
5612         binmode STDOUT, ':raw';
5613         print <$fd>;
5614         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5615         close $fd;
5616 }
5617
5618 sub git_log_generic {
5619         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
5620
5621         my $head = git_get_head_hash($project);
5622         if (!defined $base) {
5623                 $base = $head;
5624         }
5625         if (!defined $page) {
5626                 $page = 0;
5627         }
5628         my $refs = git_get_references();
5629
5630         my $commit_hash = $base;
5631         if (defined $parent) {
5632                 $commit_hash = "$parent..$base";
5633         }
5634         my @commitlist =
5635                 parse_commits($commit_hash, 101, (100 * $page),
5636                               defined $file_name ? ($file_name, "--full-history") : ());
5637
5638         my $ftype;
5639         if (!defined $file_hash && defined $file_name) {
5640                 # some commits could have deleted file in question,
5641                 # and not have it in tree, but one of them has to have it
5642                 for (my $i = 0; $i < @commitlist; $i++) {
5643                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5644                         last if defined $file_hash;
5645                 }
5646         }
5647         if (defined $file_hash) {
5648                 $ftype = git_get_type($file_hash);
5649         }
5650         if (defined $file_name && !defined $ftype) {
5651                 die_error(500, "Unknown type of object");
5652         }
5653         my %co;
5654         if (defined $file_name) {
5655                 %co = parse_commit($base)
5656                         or die_error(404, "Unknown commit object");
5657         }
5658
5659
5660         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
5661         my $next_link = '';
5662         if ($#commitlist >= 100) {
5663                 $next_link =
5664                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5665                                  -accesskey => "n", -title => "Alt-n"}, "next");
5666         }
5667         my $patch_max = gitweb_get_feature('patches');
5668         if ($patch_max && !defined $file_name) {
5669                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5670                         $paging_nav .= " &sdot; " .
5671                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5672                                         "patches");
5673                 }
5674         }
5675
5676         git_header_html();
5677         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
5678         if (defined $file_name) {
5679                 git_print_header_div('commit', esc_html($co{'title'}), $base);
5680         } else {
5681                 git_print_header_div('summary', $project)
5682         }
5683         git_print_page_path($file_name, $ftype, $hash_base)
5684                 if (defined $file_name);
5685
5686         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
5687                      $file_name, $file_hash, $ftype);
5688
5689         git_footer_html();
5690 }
5691
5692 sub git_log {
5693         git_log_generic('log', \&git_log_body,
5694                         $hash, $hash_parent);
5695 }
5696
5697 sub git_commit {
5698         $hash ||= $hash_base || "HEAD";
5699         my %co = parse_commit($hash)
5700             or die_error(404, "Unknown commit object");
5701
5702         my $parent  = $co{'parent'};
5703         my $parents = $co{'parents'}; # listref
5704
5705         # we need to prepare $formats_nav before any parameter munging
5706         my $formats_nav;
5707         if (!defined $parent) {
5708                 # --root commitdiff
5709                 $formats_nav .= '(initial)';
5710         } elsif (@$parents == 1) {
5711                 # single parent commit
5712                 $formats_nav .=
5713                         '(parent: ' .
5714                         $cgi->a({-href => href(action=>"commit",
5715                                                hash=>$parent)},
5716                                 esc_html(substr($parent, 0, 7))) .
5717                         ')';
5718         } else {
5719                 # merge commit
5720                 $formats_nav .=
5721                         '(merge: ' .
5722                         join(' ', map {
5723                                 $cgi->a({-href => href(action=>"commit",
5724                                                        hash=>$_)},
5725                                         esc_html(substr($_, 0, 7)));
5726                         } @$parents ) .
5727                         ')';
5728         }
5729         if (gitweb_check_feature('patches') && @$parents <= 1) {
5730                 $formats_nav .= " | " .
5731                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5732                                 "patch");
5733         }
5734
5735         if (!defined $parent) {
5736                 $parent = "--root";
5737         }
5738         my @difftree;
5739         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5740                 @diff_opts,
5741                 (@$parents <= 1 ? $parent : '-c'),
5742                 $hash, "--"
5743                 or die_error(500, "Open git-diff-tree failed");
5744         @difftree = map { chomp; $_ } <$fd>;
5745         close $fd or die_error(404, "Reading git-diff-tree failed");
5746
5747         # non-textual hash id's can be cached
5748         my $expires;
5749         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5750                 $expires = "+1d";
5751         }
5752         my $refs = git_get_references();
5753         my $ref = format_ref_marker($refs, $co{'id'});
5754
5755         git_header_html(undef, $expires);
5756         git_print_page_nav('commit', '',
5757                            $hash, $co{'tree'}, $hash,
5758                            $formats_nav);
5759
5760         if (defined $co{'parent'}) {
5761                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5762         } else {
5763                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5764         }
5765         print "<div class=\"title_text\">\n" .
5766               "<table class=\"object_header\">\n";
5767         git_print_authorship_rows(\%co);
5768         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5769         print "<tr>" .
5770               "<td>tree</td>" .
5771               "<td class=\"sha1\">" .
5772               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5773                        class => "list"}, $co{'tree'}) .
5774               "</td>" .
5775               "<td class=\"link\">" .
5776               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5777                       "tree");
5778         my $snapshot_links = format_snapshot_links($hash);
5779         if (defined $snapshot_links) {
5780                 print " | " . $snapshot_links;
5781         }
5782         print "</td>" .
5783               "</tr>\n";
5784
5785         foreach my $par (@$parents) {
5786                 print "<tr>" .
5787                       "<td>parent</td>" .
5788                       "<td class=\"sha1\">" .
5789                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5790                                class => "list"}, $par) .
5791                       "</td>" .
5792                       "<td class=\"link\">" .
5793                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5794                       " | " .
5795                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5796                       "</td>" .
5797                       "</tr>\n";
5798         }
5799         print "</table>".
5800               "</div>\n";
5801
5802         print "<div class=\"page_body\">\n";
5803         git_print_log($co{'comment'});
5804         print "</div>\n";
5805
5806         git_difftree_body(\@difftree, $hash, @$parents);
5807
5808         git_footer_html();
5809 }
5810
5811 sub git_object {
5812         # object is defined by:
5813         # - hash or hash_base alone
5814         # - hash_base and file_name
5815         my $type;
5816
5817         # - hash or hash_base alone
5818         if ($hash || ($hash_base && !defined $file_name)) {
5819                 my $object_id = $hash || $hash_base;
5820
5821                 open my $fd, "-|", quote_command(
5822                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5823                         or die_error(404, "Object does not exist");
5824                 $type = <$fd>;
5825                 chomp $type;
5826                 close $fd
5827                         or die_error(404, "Object does not exist");
5828
5829         # - hash_base and file_name
5830         } elsif ($hash_base && defined $file_name) {
5831                 $file_name =~ s,/+$,,;
5832
5833                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5834                         or die_error(404, "Base object does not exist");
5835
5836                 # here errors should not hapen
5837                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5838                         or die_error(500, "Open git-ls-tree failed");
5839                 my $line = <$fd>;
5840                 close $fd;
5841
5842                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5843                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5844                         die_error(404, "File or directory for given base does not exist");
5845                 }
5846                 $type = $2;
5847                 $hash = $3;
5848         } else {
5849                 die_error(400, "Not enough information to find object");
5850         }
5851
5852         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5853                                           hash=>$hash, hash_base=>$hash_base,
5854                                           file_name=>$file_name),
5855                              -status => '302 Found');
5856 }
5857
5858 sub git_blobdiff {
5859         my $format = shift || 'html';
5860
5861         my $fd;
5862         my @difftree;
5863         my %diffinfo;
5864         my $expires;
5865
5866         # preparing $fd and %diffinfo for git_patchset_body
5867         # new style URI
5868         if (defined $hash_base && defined $hash_parent_base) {
5869                 if (defined $file_name) {
5870                         # read raw output
5871                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5872                                 $hash_parent_base, $hash_base,
5873                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5874                                 or die_error(500, "Open git-diff-tree failed");
5875                         @difftree = map { chomp; $_ } <$fd>;
5876                         close $fd
5877                                 or die_error(404, "Reading git-diff-tree failed");
5878                         @difftree
5879                                 or die_error(404, "Blob diff not found");
5880
5881                 } elsif (defined $hash &&
5882                          $hash =~ /[0-9a-fA-F]{40}/) {
5883                         # try to find filename from $hash
5884
5885                         # read filtered raw output
5886                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5887                                 $hash_parent_base, $hash_base, "--"
5888                                 or die_error(500, "Open git-diff-tree failed");
5889                         @difftree =
5890                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5891                                 # $hash == to_id
5892                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5893                                 map { chomp; $_ } <$fd>;
5894                         close $fd
5895                                 or die_error(404, "Reading git-diff-tree failed");
5896                         @difftree
5897                                 or die_error(404, "Blob diff not found");
5898
5899                 } else {
5900                         die_error(400, "Missing one of the blob diff parameters");
5901                 }
5902
5903                 if (@difftree > 1) {
5904                         die_error(400, "Ambiguous blob diff specification");
5905                 }
5906
5907                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5908                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5909                 $file_name   ||= $diffinfo{'to_file'};
5910
5911                 $hash_parent ||= $diffinfo{'from_id'};
5912                 $hash        ||= $diffinfo{'to_id'};
5913
5914                 # non-textual hash id's can be cached
5915                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5916                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5917                         $expires = '+1d';
5918                 }
5919
5920                 # open patch output
5921                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5922                         '-p', ($format eq 'html' ? "--full-index" : ()),
5923                         $hash_parent_base, $hash_base,
5924                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5925                         or die_error(500, "Open git-diff-tree failed");
5926         }
5927
5928         # old/legacy style URI -- not generated anymore since 1.4.3.
5929         if (!%diffinfo) {
5930                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5931         }
5932
5933         # header
5934         if ($format eq 'html') {
5935                 my $formats_nav =
5936                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5937                                 "raw");
5938                 git_header_html(undef, $expires);
5939                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5940                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5941                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5942                 } else {
5943                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5944                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
5945                 }
5946                 if (defined $file_name) {
5947                         git_print_page_path($file_name, "blob", $hash_base);
5948                 } else {
5949                         print "<div class=\"page_path\"></div>\n";
5950                 }
5951
5952         } elsif ($format eq 'plain') {
5953                 print $cgi->header(
5954                         -type => 'text/plain',
5955                         -charset => 'utf-8',
5956                         -expires => $expires,
5957                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5958
5959                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5960
5961         } else {
5962                 die_error(400, "Unknown blobdiff format");
5963         }
5964
5965         # patch
5966         if ($format eq 'html') {
5967                 print "<div class=\"page_body\">\n";
5968
5969                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5970                 close $fd;
5971
5972                 print "</div>\n"; # class="page_body"
5973                 git_footer_html();
5974
5975         } else {
5976                 while (my $line = <$fd>) {
5977                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5978                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5979
5980                         print $line;
5981
5982                         last if $line =~ m!^\+\+\+!;
5983                 }
5984                 local $/ = undef;
5985                 print <$fd>;
5986                 close $fd;
5987         }
5988 }
5989
5990 sub git_blobdiff_plain {
5991         git_blobdiff('plain');
5992 }
5993
5994 sub git_commitdiff {
5995         my %params = @_;
5996         my $format = $params{-format} || 'html';
5997
5998         my ($patch_max) = gitweb_get_feature('patches');
5999         if ($format eq 'patch') {
6000                 die_error(403, "Patch view not allowed") unless $patch_max;
6001         }
6002
6003         $hash ||= $hash_base || "HEAD";
6004         my %co = parse_commit($hash)
6005             or die_error(404, "Unknown commit object");
6006
6007         # choose format for commitdiff for merge
6008         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6009                 $hash_parent = '--cc';
6010         }
6011         # we need to prepare $formats_nav before almost any parameter munging
6012         my $formats_nav;
6013         if ($format eq 'html') {
6014                 $formats_nav =
6015                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6016                                 "raw");
6017                 if ($patch_max && @{$co{'parents'}} <= 1) {
6018                         $formats_nav .= " | " .
6019                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6020                                         "patch");
6021                 }
6022
6023                 if (defined $hash_parent &&
6024                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6025                         # commitdiff with two commits given
6026                         my $hash_parent_short = $hash_parent;
6027                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6028                                 $hash_parent_short = substr($hash_parent, 0, 7);
6029                         }
6030                         $formats_nav .=
6031                                 ' (from';
6032                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6033                                 if ($co{'parents'}[$i] eq $hash_parent) {
6034                                         $formats_nav .= ' parent ' . ($i+1);
6035                                         last;
6036                                 }
6037                         }
6038                         $formats_nav .= ': ' .
6039                                 $cgi->a({-href => href(action=>"commitdiff",
6040                                                        hash=>$hash_parent)},
6041                                         esc_html($hash_parent_short)) .
6042                                 ')';
6043                 } elsif (!$co{'parent'}) {
6044                         # --root commitdiff
6045                         $formats_nav .= ' (initial)';
6046                 } elsif (scalar @{$co{'parents'}} == 1) {
6047                         # single parent commit
6048                         $formats_nav .=
6049                                 ' (parent: ' .
6050                                 $cgi->a({-href => href(action=>"commitdiff",
6051                                                        hash=>$co{'parent'})},
6052                                         esc_html(substr($co{'parent'}, 0, 7))) .
6053                                 ')';
6054                 } else {
6055                         # merge commit
6056                         if ($hash_parent eq '--cc') {
6057                                 $formats_nav .= ' | ' .
6058                                         $cgi->a({-href => href(action=>"commitdiff",
6059                                                                hash=>$hash, hash_parent=>'-c')},
6060                                                 'combined');
6061                         } else { # $hash_parent eq '-c'
6062                                 $formats_nav .= ' | ' .
6063                                         $cgi->a({-href => href(action=>"commitdiff",
6064                                                                hash=>$hash, hash_parent=>'--cc')},
6065                                                 'compact');
6066                         }
6067                         $formats_nav .=
6068                                 ' (merge: ' .
6069                                 join(' ', map {
6070                                         $cgi->a({-href => href(action=>"commitdiff",
6071                                                                hash=>$_)},
6072                                                 esc_html(substr($_, 0, 7)));
6073                                 } @{$co{'parents'}} ) .
6074                                 ')';
6075                 }
6076         }
6077
6078         my $hash_parent_param = $hash_parent;
6079         if (!defined $hash_parent_param) {
6080                 # --cc for multiple parents, --root for parentless
6081                 $hash_parent_param =
6082                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6083         }
6084
6085         # read commitdiff
6086         my $fd;
6087         my @difftree;
6088         if ($format eq 'html') {
6089                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6090                         "--no-commit-id", "--patch-with-raw", "--full-index",
6091                         $hash_parent_param, $hash, "--"
6092                         or die_error(500, "Open git-diff-tree failed");
6093
6094                 while (my $line = <$fd>) {
6095                         chomp $line;
6096                         # empty line ends raw part of diff-tree output
6097                         last unless $line;
6098                         push @difftree, scalar parse_difftree_raw_line($line);
6099                 }
6100
6101         } elsif ($format eq 'plain') {
6102                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6103                         '-p', $hash_parent_param, $hash, "--"
6104                         or die_error(500, "Open git-diff-tree failed");
6105         } elsif ($format eq 'patch') {
6106                 # For commit ranges, we limit the output to the number of
6107                 # patches specified in the 'patches' feature.
6108                 # For single commits, we limit the output to a single patch,
6109                 # diverging from the git-format-patch default.
6110                 my @commit_spec = ();
6111                 if ($hash_parent) {
6112                         if ($patch_max > 0) {
6113                                 push @commit_spec, "-$patch_max";
6114                         }
6115                         push @commit_spec, '-n', "$hash_parent..$hash";
6116                 } else {
6117                         if ($params{-single}) {
6118                                 push @commit_spec, '-1';
6119                         } else {
6120                                 if ($patch_max > 0) {
6121                                         push @commit_spec, "-$patch_max";
6122                                 }
6123                                 push @commit_spec, "-n";
6124                         }
6125                         push @commit_spec, '--root', $hash;
6126                 }
6127                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
6128                         '--stdout', @commit_spec
6129                         or die_error(500, "Open git-format-patch failed");
6130         } else {
6131                 die_error(400, "Unknown commitdiff format");
6132         }
6133
6134         # non-textual hash id's can be cached
6135         my $expires;
6136         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6137                 $expires = "+1d";
6138         }
6139
6140         # write commit message
6141         if ($format eq 'html') {
6142                 my $refs = git_get_references();
6143                 my $ref = format_ref_marker($refs, $co{'id'});
6144
6145                 git_header_html(undef, $expires);
6146                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6147                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6148                 print "<div class=\"title_text\">\n" .
6149                       "<table class=\"object_header\">\n";
6150                 git_print_authorship_rows(\%co);
6151                 print "</table>".
6152                       "</div>\n";
6153                 print "<div class=\"page_body\">\n";
6154                 if (@{$co{'comment'}} > 1) {
6155                         print "<div class=\"log\">\n";
6156                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6157                         print "</div>\n"; # class="log"
6158                 }
6159
6160         } elsif ($format eq 'plain') {
6161                 my $refs = git_get_references("tags");
6162                 my $tagname = git_get_rev_name_tags($hash);
6163                 my $filename = basename($project) . "-$hash.patch";
6164
6165                 print $cgi->header(
6166                         -type => 'text/plain',
6167                         -charset => 'utf-8',
6168                         -expires => $expires,
6169                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6170                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6171                 print "From: " . to_utf8($co{'author'}) . "\n";
6172                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6173                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6174
6175                 print "X-Git-Tag: $tagname\n" if $tagname;
6176                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6177
6178                 foreach my $line (@{$co{'comment'}}) {
6179                         print to_utf8($line) . "\n";
6180                 }
6181                 print "---\n\n";
6182         } elsif ($format eq 'patch') {
6183                 my $filename = basename($project) . "-$hash.patch";
6184
6185                 print $cgi->header(
6186                         -type => 'text/plain',
6187                         -charset => 'utf-8',
6188                         -expires => $expires,
6189                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6190         }
6191
6192         # write patch
6193         if ($format eq 'html') {
6194                 my $use_parents = !defined $hash_parent ||
6195                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6196                 git_difftree_body(\@difftree, $hash,
6197                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6198                 print "<br/>\n";
6199
6200                 git_patchset_body($fd, \@difftree, $hash,
6201                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6202                 close $fd;
6203                 print "</div>\n"; # class="page_body"
6204                 git_footer_html();
6205
6206         } elsif ($format eq 'plain') {
6207                 local $/ = undef;
6208                 print <$fd>;
6209                 close $fd
6210                         or print "Reading git-diff-tree failed\n";
6211         } elsif ($format eq 'patch') {
6212                 local $/ = undef;
6213                 print <$fd>;
6214                 close $fd
6215                         or print "Reading git-format-patch failed\n";
6216         }
6217 }
6218
6219 sub git_commitdiff_plain {
6220         git_commitdiff(-format => 'plain');
6221 }
6222
6223 # format-patch-style patches
6224 sub git_patch {
6225         git_commitdiff(-format => 'patch', -single => 1);
6226 }
6227
6228 sub git_patches {
6229         git_commitdiff(-format => 'patch');
6230 }
6231
6232 sub git_history {
6233         git_log_generic('history', \&git_history_body,
6234                         $hash_base, $hash_parent_base,
6235                         $file_name, $hash);
6236 }
6237
6238 sub git_search {
6239         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6240         if (!defined $searchtext) {
6241                 die_error(400, "Text field is empty");
6242         }
6243         if (!defined $hash) {
6244                 $hash = git_get_head_hash($project);
6245         }
6246         my %co = parse_commit($hash);
6247         if (!%co) {
6248                 die_error(404, "Unknown commit object");
6249         }
6250         if (!defined $page) {
6251                 $page = 0;
6252         }
6253
6254         $searchtype ||= 'commit';
6255         if ($searchtype eq 'pickaxe') {
6256                 # pickaxe may take all resources of your box and run for several minutes
6257                 # with every query - so decide by yourself how public you make this feature
6258                 gitweb_check_feature('pickaxe')
6259                     or die_error(403, "Pickaxe is disabled");
6260         }
6261         if ($searchtype eq 'grep') {
6262                 gitweb_check_feature('grep')
6263                     or die_error(403, "Grep is disabled");
6264         }
6265
6266         git_header_html();
6267
6268         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6269                 my $greptype;
6270                 if ($searchtype eq 'commit') {
6271                         $greptype = "--grep=";
6272                 } elsif ($searchtype eq 'author') {
6273                         $greptype = "--author=";
6274                 } elsif ($searchtype eq 'committer') {
6275                         $greptype = "--committer=";
6276                 }
6277                 $greptype .= $searchtext;
6278                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6279                                                $greptype, '--regexp-ignore-case',
6280                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6281
6282                 my $paging_nav = '';
6283                 if ($page > 0) {
6284                         $paging_nav .=
6285                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6286                                                        searchtext=>$searchtext,
6287                                                        searchtype=>$searchtype)},
6288                                         "first");
6289                         $paging_nav .= " &sdot; " .
6290                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6291                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6292                 } else {
6293                         $paging_nav .= "first";
6294                         $paging_nav .= " &sdot; prev";
6295                 }
6296                 my $next_link = '';
6297                 if ($#commitlist >= 100) {
6298                         $next_link =
6299                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6300                                          -accesskey => "n", -title => "Alt-n"}, "next");
6301                         $paging_nav .= " &sdot; $next_link";
6302                 } else {
6303                         $paging_nav .= " &sdot; next";
6304                 }
6305
6306                 if ($#commitlist >= 100) {
6307                 }
6308
6309                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6310                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6311                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6312         }
6313
6314         if ($searchtype eq 'pickaxe') {
6315                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6316                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6317
6318                 print "<table class=\"pickaxe search\">\n";
6319                 my $alternate = 1;
6320                 local $/ = "\n";
6321                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6322                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6323                         ($search_use_regexp ? '--pickaxe-regex' : ());
6324                 undef %co;
6325                 my @files;
6326                 while (my $line = <$fd>) {
6327                         chomp $line;
6328                         next unless $line;
6329
6330                         my %set = parse_difftree_raw_line($line);
6331                         if (defined $set{'commit'}) {
6332                                 # finish previous commit
6333                                 if (%co) {
6334                                         print "</td>\n" .
6335                                               "<td class=\"link\">" .
6336                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6337                                               " | " .
6338                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6339                                         print "</td>\n" .
6340                                               "</tr>\n";
6341                                 }
6342
6343                                 if ($alternate) {
6344                                         print "<tr class=\"dark\">\n";
6345                                 } else {
6346                                         print "<tr class=\"light\">\n";
6347                                 }
6348                                 $alternate ^= 1;
6349                                 %co = parse_commit($set{'commit'});
6350                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6351                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6352                                       "<td><i>$author</i></td>\n" .
6353                                       "<td>" .
6354                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6355                                               -class => "list subject"},
6356                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6357                         } elsif (defined $set{'to_id'}) {
6358                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6359
6360                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6361                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6362                                               -class => "list"},
6363                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6364                                       "<br/>\n";
6365                         }
6366                 }
6367                 close $fd;
6368
6369                 # finish last commit (warning: repetition!)
6370                 if (%co) {
6371                         print "</td>\n" .
6372                               "<td class=\"link\">" .
6373                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6374                               " | " .
6375                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6376                         print "</td>\n" .
6377                               "</tr>\n";
6378                 }
6379
6380                 print "</table>\n";
6381         }
6382
6383         if ($searchtype eq 'grep') {
6384                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6385                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6386
6387                 print "<table class=\"grep_search\">\n";
6388                 my $alternate = 1;
6389                 my $matches = 0;
6390                 local $/ = "\n";
6391                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6392                         $search_use_regexp ? ('-E', '-i') : '-F',
6393                         $searchtext, $co{'tree'};
6394                 my $lastfile = '';
6395                 while (my $line = <$fd>) {
6396                         chomp $line;
6397                         my ($file, $lno, $ltext, $binary);
6398                         last if ($matches++ > 1000);
6399                         if ($line =~ /^Binary file (.+) matches$/) {
6400                                 $file = $1;
6401                                 $binary = 1;
6402                         } else {
6403                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6404                         }
6405                         if ($file ne $lastfile) {
6406                                 $lastfile and print "</td></tr>\n";
6407                                 if ($alternate++) {
6408                                         print "<tr class=\"dark\">\n";
6409                                 } else {
6410                                         print "<tr class=\"light\">\n";
6411                                 }
6412                                 print "<td class=\"list\">".
6413                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6414                                                                file_name=>"$file"),
6415                                                 -class => "list"}, esc_path($file));
6416                                 print "</td><td>\n";
6417                                 $lastfile = $file;
6418                         }
6419                         if ($binary) {
6420                                 print "<div class=\"binary\">Binary file</div>\n";
6421                         } else {
6422                                 $ltext = untabify($ltext);
6423                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6424                                         $ltext = esc_html($1, -nbsp=>1);
6425                                         $ltext .= '<span class="match">';
6426                                         $ltext .= esc_html($2, -nbsp=>1);
6427                                         $ltext .= '</span>';
6428                                         $ltext .= esc_html($3, -nbsp=>1);
6429                                 } else {
6430                                         $ltext = esc_html($ltext, -nbsp=>1);
6431                                 }
6432                                 print "<div class=\"pre\">" .
6433                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6434                                                                file_name=>"$file").'#l'.$lno,
6435                                                 -class => "linenr"}, sprintf('%4i', $lno))
6436                                         . ' ' .  $ltext . "</div>\n";
6437                         }
6438                 }
6439                 if ($lastfile) {
6440                         print "</td></tr>\n";
6441                         if ($matches > 1000) {
6442                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6443                         }
6444                 } else {
6445                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6446                 }
6447                 close $fd;
6448
6449                 print "</table>\n";
6450         }
6451         git_footer_html();
6452 }
6453
6454 sub git_search_help {
6455         git_header_html();
6456         git_print_page_nav('','', $hash,$hash,$hash);
6457         print <<EOT;
6458 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6459 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6460 the pattern entered is recognized as the POSIX extended
6461 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6462 insensitive).</p>
6463 <dl>
6464 <dt><b>commit</b></dt>
6465 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6466 EOT
6467         my $have_grep = gitweb_check_feature('grep');
6468         if ($have_grep) {
6469                 print <<EOT;
6470 <dt><b>grep</b></dt>
6471 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6472     a different one) are searched for the given pattern. On large trees, this search can take
6473 a while and put some strain on the server, so please use it with some consideration. Note that
6474 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6475 case-sensitive.</dd>
6476 EOT
6477         }
6478         print <<EOT;
6479 <dt><b>author</b></dt>
6480 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6481 <dt><b>committer</b></dt>
6482 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6483 EOT
6484         my $have_pickaxe = gitweb_check_feature('pickaxe');
6485         if ($have_pickaxe) {
6486                 print <<EOT;
6487 <dt><b>pickaxe</b></dt>
6488 <dd>All commits that caused the string to appear or disappear from any file (changes that
6489 added, removed or "modified" the string) will be listed. This search can take a while and
6490 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6491 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6492 EOT
6493         }
6494         print "</dl>\n";
6495         git_footer_html();
6496 }
6497
6498 sub git_shortlog {
6499         git_log_generic('shortlog', \&git_shortlog_body,
6500                         $hash, $hash_parent);
6501 }
6502
6503 ## ......................................................................
6504 ## feeds (RSS, Atom; OPML)
6505
6506 sub git_feed {
6507         my $format = shift || 'atom';
6508         my $have_blame = gitweb_check_feature('blame');
6509
6510         # Atom: http://www.atomenabled.org/developers/syndication/
6511         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6512         if ($format ne 'rss' && $format ne 'atom') {
6513                 die_error(400, "Unknown web feed format");
6514         }
6515
6516         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6517         my $head = $hash || 'HEAD';
6518         my @commitlist = parse_commits($head, 150, 0, $file_name);
6519
6520         my %latest_commit;
6521         my %latest_date;
6522         my $content_type = "application/$format+xml";
6523         if (defined $cgi->http('HTTP_ACCEPT') &&
6524                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6525                 # browser (feed reader) prefers text/xml
6526                 $content_type = 'text/xml';
6527         }
6528         if (defined($commitlist[0])) {
6529                 %latest_commit = %{$commitlist[0]};
6530                 my $latest_epoch = $latest_commit{'committer_epoch'};
6531                 %latest_date   = parse_date($latest_epoch);
6532                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6533                 if (defined $if_modified) {
6534                         my $since;
6535                         if (eval { require HTTP::Date; 1; }) {
6536                                 $since = HTTP::Date::str2time($if_modified);
6537                         } elsif (eval { require Time::ParseDate; 1; }) {
6538                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6539                         }
6540                         if (defined $since && $latest_epoch <= $since) {
6541                                 print $cgi->header(
6542                                         -type => $content_type,
6543                                         -charset => 'utf-8',
6544                                         -last_modified => $latest_date{'rfc2822'},
6545                                         -status => '304 Not Modified');
6546                                 return;
6547                         }
6548                 }
6549                 print $cgi->header(
6550                         -type => $content_type,
6551                         -charset => 'utf-8',
6552                         -last_modified => $latest_date{'rfc2822'});
6553         } else {
6554                 print $cgi->header(
6555                         -type => $content_type,
6556                         -charset => 'utf-8');
6557         }
6558
6559         # Optimization: skip generating the body if client asks only
6560         # for Last-Modified date.
6561         return if ($cgi->request_method() eq 'HEAD');
6562
6563         # header variables
6564         my $title = "$site_name - $project/$action";
6565         my $feed_type = 'log';
6566         if (defined $hash) {
6567                 $title .= " - '$hash'";
6568                 $feed_type = 'branch log';
6569                 if (defined $file_name) {
6570                         $title .= " :: $file_name";
6571                         $feed_type = 'history';
6572                 }
6573         } elsif (defined $file_name) {
6574                 $title .= " - $file_name";
6575                 $feed_type = 'history';
6576         }
6577         $title .= " $feed_type";
6578         my $descr = git_get_project_description($project);
6579         if (defined $descr) {
6580                 $descr = esc_html($descr);
6581         } else {
6582                 $descr = "$project " .
6583                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6584                          " feed";
6585         }
6586         my $owner = git_get_project_owner($project);
6587         $owner = esc_html($owner);
6588
6589         #header
6590         my $alt_url;
6591         if (defined $file_name) {
6592                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6593         } elsif (defined $hash) {
6594                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6595         } else {
6596                 $alt_url = href(-full=>1, action=>"summary");
6597         }
6598         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6599         if ($format eq 'rss') {
6600                 print <<XML;
6601 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6602 <channel>
6603 XML
6604                 print "<title>$title</title>\n" .
6605                       "<link>$alt_url</link>\n" .
6606                       "<description>$descr</description>\n" .
6607                       "<language>en</language>\n" .
6608                       # project owner is responsible for 'editorial' content
6609                       "<managingEditor>$owner</managingEditor>\n";
6610                 if (defined $logo || defined $favicon) {
6611                         # prefer the logo to the favicon, since RSS
6612                         # doesn't allow both
6613                         my $img = esc_url($logo || $favicon);
6614                         print "<image>\n" .
6615                               "<url>$img</url>\n" .
6616                               "<title>$title</title>\n" .
6617                               "<link>$alt_url</link>\n" .
6618                               "</image>\n";
6619                 }
6620                 if (%latest_date) {
6621                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6622                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6623                 }
6624                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6625         } elsif ($format eq 'atom') {
6626                 print <<XML;
6627 <feed xmlns="http://www.w3.org/2005/Atom">
6628 XML
6629                 print "<title>$title</title>\n" .
6630                       "<subtitle>$descr</subtitle>\n" .
6631                       '<link rel="alternate" type="text/html" href="' .
6632                       $alt_url . '" />' . "\n" .
6633                       '<link rel="self" type="' . $content_type . '" href="' .
6634                       $cgi->self_url() . '" />' . "\n" .
6635                       "<id>" . href(-full=>1) . "</id>\n" .
6636                       # use project owner for feed author
6637                       "<author><name>$owner</name></author>\n";
6638                 if (defined $favicon) {
6639                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6640                 }
6641                 if (defined $logo_url) {
6642                         # not twice as wide as tall: 72 x 27 pixels
6643                         print "<logo>" . esc_url($logo) . "</logo>\n";
6644                 }
6645                 if (! %latest_date) {
6646                         # dummy date to keep the feed valid until commits trickle in:
6647                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6648                 } else {
6649                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6650                 }
6651                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6652         }
6653
6654         # contents
6655         for (my $i = 0; $i <= $#commitlist; $i++) {
6656                 my %co = %{$commitlist[$i]};
6657                 my $commit = $co{'id'};
6658                 # we read 150, we always show 30 and the ones more recent than 48 hours
6659                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6660                         last;
6661                 }
6662                 my %cd = parse_date($co{'author_epoch'});
6663
6664                 # get list of changed files
6665                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6666                         $co{'parent'} || "--root",
6667                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6668                         or next;
6669                 my @difftree = map { chomp; $_ } <$fd>;
6670                 close $fd
6671                         or next;
6672
6673                 # print element (entry, item)
6674                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6675                 if ($format eq 'rss') {
6676                         print "<item>\n" .
6677                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6678                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6679                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6680                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6681                               "<link>$co_url</link>\n" .
6682                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6683                               "<content:encoded>" .
6684                               "<![CDATA[\n";
6685                 } elsif ($format eq 'atom') {
6686                         print "<entry>\n" .
6687                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6688                               "<updated>$cd{'iso-8601'}</updated>\n" .
6689                               "<author>\n" .
6690                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6691                         if ($co{'author_email'}) {
6692                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6693                         }
6694                         print "</author>\n" .
6695                               # use committer for contributor
6696                               "<contributor>\n" .
6697                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6698                         if ($co{'committer_email'}) {
6699                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6700                         }
6701                         print "</contributor>\n" .
6702                               "<published>$cd{'iso-8601'}</published>\n" .
6703                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6704                               "<id>$co_url</id>\n" .
6705                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6706                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6707                 }
6708                 my $comment = $co{'comment'};
6709                 print "<pre>\n";
6710                 foreach my $line (@$comment) {
6711                         $line = esc_html($line);
6712                         print "$line\n";
6713                 }
6714                 print "</pre><ul>\n";
6715                 foreach my $difftree_line (@difftree) {
6716                         my %difftree = parse_difftree_raw_line($difftree_line);
6717                         next if !$difftree{'from_id'};
6718
6719                         my $file = $difftree{'file'} || $difftree{'to_file'};
6720
6721                         print "<li>" .
6722                               "[" .
6723                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6724                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6725                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6726                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6727                                       -title => "diff"}, 'D');
6728                         if ($have_blame) {
6729                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6730                                                              file_name=>$file, hash_base=>$commit),
6731                                               -title => "blame"}, 'B');
6732                         }
6733                         # if this is not a feed of a file history
6734                         if (!defined $file_name || $file_name ne $file) {
6735                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6736                                                              file_name=>$file, hash=>$commit),
6737                                               -title => "history"}, 'H');
6738                         }
6739                         $file = esc_path($file);
6740                         print "] ".
6741                               "$file</li>\n";
6742                 }
6743                 if ($format eq 'rss') {
6744                         print "</ul>]]>\n" .
6745                               "</content:encoded>\n" .
6746                               "</item>\n";
6747                 } elsif ($format eq 'atom') {
6748                         print "</ul>\n</div>\n" .
6749                               "</content>\n" .
6750                               "</entry>\n";
6751                 }
6752         }
6753
6754         # end of feed
6755         if ($format eq 'rss') {
6756                 print "</channel>\n</rss>\n";
6757         } elsif ($format eq 'atom') {
6758                 print "</feed>\n";
6759         }
6760 }
6761
6762 sub git_rss {
6763         git_feed('rss');
6764 }
6765
6766 sub git_atom {
6767         git_feed('atom');
6768 }
6769
6770 sub git_opml {
6771         my @list = git_get_projects_list();
6772
6773         print $cgi->header(
6774                 -type => 'text/xml',
6775                 -charset => 'utf-8',
6776                 -content_disposition => 'inline; filename="opml.xml"');
6777
6778         print <<XML;
6779 <?xml version="1.0" encoding="utf-8"?>
6780 <opml version="1.0">
6781 <head>
6782   <title>$site_name OPML Export</title>
6783 </head>
6784 <body>
6785 <outline text="git RSS feeds">
6786 XML
6787
6788         foreach my $pr (@list) {
6789                 my %proj = %$pr;
6790                 my $head = git_get_head_hash($proj{'path'});
6791                 if (!defined $head) {
6792                         next;
6793                 }
6794                 $git_dir = "$projectroot/$proj{'path'}";
6795                 my %co = parse_commit($head);
6796                 if (!%co) {
6797                         next;
6798                 }
6799
6800                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6801                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6802                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6803                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6804         }
6805         print <<XML;
6806 </outline>
6807 </body>
6808 </opml>
6809 XML
6810 }