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