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