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