gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 our $t0;
  22 if (eval { require Time::HiRes; 1; }) {
  23         $t0 = [Time::HiRes::gettimeofday()];
  24 }
  25 our $number_of_git_cmds = 0;
  26
  27 BEGIN {
  28         CGI->compile() if $ENV{'MOD_PERL'};
  29 }
  30
  31 our $cgi = new CGI;
  32 our $version = "++GIT_VERSION++";
  33 our $my_url = $cgi->url();
  34 our $my_uri = $cgi->url(-absolute => 1);
  35
  36 # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  37 # needed and used only for URLs with nonempty PATH_INFO
  38 our $base_url = $my_url;
  39
  40 # When the script is used as DirectoryIndex, the URL does not contain the name
  41 # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  42 # have to do it ourselves. We make $path_info global because it's also used
  43 # later on.
  44 #
  45 # Another issue with the script being the DirectoryIndex is that the resulting
  46 # $my_url data is not the full script URL: this is good, because we want
  47 # generated links to keep implying the script name if it wasn't explicitly
  48 # indicated in the URL we're handling, but it means that $my_url cannot be used
  49 # as base URL.
  50 # Therefore, if we needed to strip PATH_INFO, then we know that we have
  51 # to build the base URL ourselves:
  52 our $path_info = $ENV{"PATH_INFO"};
  53 if ($path_info) {
  54         if ($my_url =~ s,\Q$path_info\E$,, &&
  55             $my_uri =~ s,\Q$path_info\E$,, &&
  56             defined $ENV{'SCRIPT_NAME'}) {
  57                 $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  58         }
  59 }
  60
  61 # core git executable to use
  62 # this can just be "git" if your webserver has a sensible PATH
  63 our $GIT = "++GIT_BINDIR++/git";
  64
  65 # absolute fs-path which will be prepended to the project path
  66 #our $projectroot = "/pub/scm";
  67 our $projectroot = "++GITWEB_PROJECTROOT++";
  68
  69 # fs traversing limit for getting project list
  70 # the number is relative to the projectroot
  71 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  72
  73 # target of the home link on top of all pages
  74 our $home_link = $my_uri || "/";
  75
  76 # string of the home link on top of all pages
  77 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  78
  79 # name of your site or organization to appear in page titles
  80 # replace this with something more descriptive for clearer bookmarks
  81 our $site_name = "++GITWEB_SITENAME++"
  82                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  83
  84 # filename of html text to include at top of each page
  85 our $site_header = "++GITWEB_SITE_HEADER++";
  86 # html text to include at home page
  87 our $home_text = "++GITWEB_HOMETEXT++";
  88 # filename of html text to include at bottom of each page
  89 our $site_footer = "++GITWEB_SITE_FOOTER++";
  90
  91 # URI of stylesheets
  92 our @stylesheets = ("++GITWEB_CSS++");
  93 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  94 our $stylesheet = undef;
  95 # URI of GIT logo (72x27 size)
  96 our $logo = "++GITWEB_LOGO++";
  97 # URI of GIT favicon, assumed to be image/png type
  98 our $favicon = "++GITWEB_FAVICON++";
  99 # URI of gitweb.js (JavaScript code for gitweb)
 100 our $javascript = "++GITWEB_JS++";
 101
 102 # URI and label (title) of GIT logo link
 103 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 104 #our $logo_label = "git documentation";
 105 our $logo_url = "http://git-scm.com/";
 106 our $logo_label = "git homepage";
 107
 108 # source of projects list
 109 our $projects_list = "++GITWEB_LIST++";
 110
 111 # the width (in characters) of the projects list "Description" column
 112 our $projects_list_description_width = 25;
 113
 114 # default order of projects list
 115 # valid values are none, project, descr, owner, and age
 116 our $default_projects_order = "project";
 117
 118 # show repository only if this file exists
 119 # (only effective if this variable evaluates to true)
 120 our $export_ok = "++GITWEB_EXPORT_OK++";
 121
 122 # show repository only if this subroutine returns true
 123 # when given the path to the project, for example:
 124 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 125 our $export_auth_hook = undef;
 126
 127 # only allow viewing of repositories also shown on the overview page
 128 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 129
 130 # list of git base URLs used for URL to where fetch project from,
 131 # i.e. full URL is "$git_base_url/$project"
 132 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 133
 134 # default blob_plain mimetype and default charset for text/plain blob
 135 our $default_blob_plain_mimetype = 'text/plain';
 136 our $default_text_plain_charset  = undef;
 137
 138 # file to use for guessing MIME types before trying /etc/mime.types
 139 # (relative to the current git repository)
 140 our $mimetypes_file = undef;
 141
 142 # assume this charset if line contains non-UTF-8 characters;
 143 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 144 # for which encoding all byte sequences are valid, for example
 145 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 146 # could be even 'utf-8' for the old behavior)
 147 our $fallback_encoding = 'latin1';
 148
 149 # rename detection options for git-diff and git-diff-tree
 150 # - default is '-M', with the cost proportional to
 151 #   (number of removed files) * (number of new files).
 152 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 153 #   (number of changed files + number of removed files) * (number of new files)
 154 # - even more costly is '-C', '--find-copies-harder' with cost
 155 #   (number of files in the original tree) * (number of new files)
 156 # - one might want to include '-B' option, e.g. '-B', '-M'
 157 our @diff_opts = ('-M'); # taken from git_commit
 158
 159 # Disables features that would allow repository owners to inject script into
 160 # the gitweb domain.
 161 our $prevent_xss = 0;
 162
 163 # information about snapshot formats that gitweb is capable of serving
 164 our %known_snapshot_formats = (
 165         # name => {
 166         #       'display' => display name,
 167         #       'type' => mime type,
 168         #       'suffix' => filename suffix,
 169         #       'format' => --format for git-archive,
 170         #       'compressor' => [compressor command and arguments]
 171         #                       (array reference, optional)
 172         #       'disabled' => boolean (optional)}
 173         #
 174         'tgz' => {
 175                 'display' => 'tar.gz',
 176                 'type' => 'application/x-gzip',
 177                 'suffix' => '.tar.gz',
 178                 'format' => 'tar',
 179                 'compressor' => ['gzip']},
 180
 181         'tbz2' => {
 182                 'display' => 'tar.bz2',
 183                 'type' => 'application/x-bzip2',
 184                 'suffix' => '.tar.bz2',
 185                 'format' => 'tar',
 186                 'compressor' => ['bzip2']},
 187
 188         'txz' => {
 189                 'display' => 'tar.xz',
 190                 'type' => 'application/x-xz',
 191                 'suffix' => '.tar.xz',
 192                 'format' => 'tar',
 193                 'compressor' => ['xz'],
 194                 'disabled' => 1},
 195
 196         'zip' => {
 197                 'display' => 'zip',
 198                 'type' => 'application/x-zip',
 199                 'suffix' => '.zip',
 200                 'format' => 'zip'},
 201 );
 202
 203 # Aliases so we understand old gitweb.snapshot values in repository
 204 # configuration.
 205 our %known_snapshot_format_aliases = (
 206         'gzip'  => 'tgz',
 207         'bzip2' => 'tbz2',
 208         'xz'    => 'txz',
 209
 210         # backward compatibility: legacy gitweb config support
 211         'x-gzip' => undef, 'gz' => undef,
 212         'x-bzip2' => undef, 'bz2' => undef,
 213         'x-zip' => undef, '' => undef,
 214 );
 215
 216 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 217 # are changed, it may be appropriate to change these values too via
 218 # $GITWEB_CONFIG.
 219 our %avatar_size = (
 220         'default' => 16,
 221         'double'  => 32
 222 );
 223
 224 # Used to set the maximum load that we will still respond to gitweb queries.
 225 # If server load exceed this value then return "503 server busy" error.
 226 # If gitweb cannot determined server load, it is taken to be 0.
 227 # Leave it undefined (or set to 'undef') to turn off load checking.
 228 our $maxload = 300;
 229
 230 # You define site-wide feature defaults here; override them with
 231 # $GITWEB_CONFIG as necessary.
 232 our %feature = (
 233         # feature => {
 234         #       'sub' => feature-sub (subroutine),
 235         #       'override' => allow-override (boolean),
 236         #       'default' => [ default options...] (array reference)}
 237         #
 238         # if feature is overridable (it means that allow-override has true value),
 239         # then feature-sub will be called with default options as parameters;
 240         # return value of feature-sub indicates if to enable specified feature
 241         #
 242         # if there is no 'sub' key (no feature-sub), then feature cannot be
 243         # overriden
 244         #
 245         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 246         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 247         # is enabled
 248
 249         # Enable the 'blame' blob view, showing the last commit that modified
 250         # each line in the file. This can be very CPU-intensive.
 251
 252         # To enable system wide have in $GITWEB_CONFIG
 253         # $feature{'blame'}{'default'} = [1];
 254         # To have project specific config enable override in $GITWEB_CONFIG
 255         # $feature{'blame'}{'override'} = 1;
 256         # and in project config gitweb.blame = 0|1;
 257         'blame' => {
 258                 'sub' => sub { feature_bool('blame', @_) },
 259                 'override' => 0,
 260                 'default' => [0]},
 261
 262         # Enable the 'snapshot' link, providing a compressed archive of any
 263         # tree. This can potentially generate high traffic if you have large
 264         # project.
 265
 266         # Value is a list of formats defined in %known_snapshot_formats that
 267         # you wish to offer.
 268         # To disable system wide have in $GITWEB_CONFIG
 269         # $feature{'snapshot'}{'default'} = [];
 270         # To have project specific config enable override in $GITWEB_CONFIG
 271         # $feature{'snapshot'}{'override'} = 1;
 272         # and in project config, a comma-separated list of formats or "none"
 273         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 274         'snapshot' => {
 275                 'sub' => \&feature_snapshot,
 276                 'override' => 0,
 277                 'default' => ['tgz']},
 278
 279         # Enable text search, which will list the commits which match author,
 280         # committer or commit text to a given string.  Enabled by default.
 281         # Project specific override is not supported.
 282         'search' => {
 283                 'override' => 0,
 284                 'default' => [1]},
 285
 286         # Enable grep search, which will list the files in currently selected
 287         # tree containing the given string. Enabled by default. This can be
 288         # potentially CPU-intensive, of course.
 289
 290         # To enable system wide have in $GITWEB_CONFIG
 291         # $feature{'grep'}{'default'} = [1];
 292         # To have project specific config enable override in $GITWEB_CONFIG
 293         # $feature{'grep'}{'override'} = 1;
 294         # and in project config gitweb.grep = 0|1;
 295         'grep' => {
 296                 'sub' => sub { feature_bool('grep', @_) },
 297                 'override' => 0,
 298                 'default' => [1]},
 299
 300         # Enable the pickaxe search, which will list the commits that modified
 301         # a given string in a file. This can be practical and quite faster
 302         # alternative to 'blame', but still potentially CPU-intensive.
 303
 304         # To enable system wide have in $GITWEB_CONFIG
 305         # $feature{'pickaxe'}{'default'} = [1];
 306         # To have project specific config enable override in $GITWEB_CONFIG
 307         # $feature{'pickaxe'}{'override'} = 1;
 308         # and in project config gitweb.pickaxe = 0|1;
 309         'pickaxe' => {
 310                 'sub' => sub { feature_bool('pickaxe', @_) },
 311                 'override' => 0,
 312                 'default' => [1]},
 313
 314         # Enable showing size of blobs in a 'tree' view, in a separate
 315         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 316
 317         # To disable system wide have in $GITWEB_CONFIG
 318         # $feature{'show-sizes'}{'default'} = [0];
 319         # To have project specific config enable override in $GITWEB_CONFIG
 320         # $feature{'show-sizes'}{'override'} = 1;
 321         # and in project config gitweb.showsizes = 0|1;
 322         'show-sizes' => {
 323                 'sub' => sub { feature_bool('showsizes', @_) },
 324                 'override' => 0,
 325                 'default' => [1]},
 326
 327         # Make gitweb use an alternative format of the URLs which can be
 328         # more readable and natural-looking: project name is embedded
 329         # directly in the path and the query string contains other
 330         # auxiliary information. All gitweb installations recognize
 331         # URL in either format; this configures in which formats gitweb
 332         # generates links.
 333
 334         # To enable system wide have in $GITWEB_CONFIG
 335         # $feature{'pathinfo'}{'default'} = [1];
 336         # Project specific override is not supported.
 337
 338         # Note that you will need to change the default location of CSS,
 339         # favicon, logo and possibly other files to an absolute URL. Also,
 340         # if gitweb.cgi serves as your indexfile, you will need to force
 341         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 342         'pathinfo' => {
 343                 'override' => 0,
 344                 'default' => [0]},
 345
 346         # Make gitweb consider projects in project root subdirectories
 347         # to be forks of existing projects. Given project $projname.git,
 348         # projects matching $projname/*.git will not be shown in the main
 349         # projects list, instead a '+' mark will be added to $projname
 350         # there and a 'forks' view will be enabled for the project, listing
 351         # all the forks. If project list is taken from a file, forks have
 352         # to be listed after the main project.
 353
 354         # To enable system wide have in $GITWEB_CONFIG
 355         # $feature{'forks'}{'default'} = [1];
 356         # Project specific override is not supported.
 357         'forks' => {
 358                 'override' => 0,
 359                 'default' => [0]},
 360
 361         # Insert custom links to the action bar of all project pages.
 362         # This enables you mainly to link to third-party scripts integrating
 363         # into gitweb; e.g. git-browser for graphical history representation
 364         # or custom web-based repository administration interface.
 365
 366         # The 'default' value consists of a list of triplets in the form
 367         # (label, link, position) where position is the label after which
 368         # to insert the link and link is a format string where %n expands
 369         # to the project name, %f to the project path within the filesystem,
 370         # %h to the current hash (h gitweb parameter) and %b to the current
 371         # hash base (hb gitweb parameter); %% expands to %.
 372
 373         # To enable system wide have in $GITWEB_CONFIG e.g.
 374         # $feature{'actions'}{'default'} = [('graphiclog',
 375         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 376         # Project specific override is not supported.
 377         'actions' => {
 378                 'override' => 0,
 379                 'default' => []},
 380
 381         # Allow gitweb scan project content tags described in ctags/
 382         # of project repository, and display the popular Web 2.0-ish
 383         # "tag cloud" near the project list. Note that this is something
 384         # COMPLETELY different from the normal Git tags.
 385
 386         # gitweb by itself can show existing tags, but it does not handle
 387         # tagging itself; you need an external application for that.
 388         # For an example script, check Girocco's cgi/tagproj.cgi.
 389         # You may want to install the HTML::TagCloud Perl module to get
 390         # a pretty tag cloud instead of just a list of tags.
 391
 392         # To enable system wide have in $GITWEB_CONFIG
 393         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 394         # Project specific override is not supported.
 395         'ctags' => {
 396                 'override' => 0,
 397                 'default' => [0]},
 398
 399         # The maximum number of patches in a patchset generated in patch
 400         # view. Set this to 0 or undef to disable patch view, or to a
 401         # negative number to remove any limit.
 402
 403         # To disable system wide have in $GITWEB_CONFIG
 404         # $feature{'patches'}{'default'} = [0];
 405         # To have project specific config enable override in $GITWEB_CONFIG
 406         # $feature{'patches'}{'override'} = 1;
 407         # and in project config gitweb.patches = 0|n;
 408         # where n is the maximum number of patches allowed in a patchset.
 409         'patches' => {
 410                 'sub' => \&feature_patches,
 411                 'override' => 0,
 412                 'default' => [16]},
 413
 414         # Avatar support. When this feature is enabled, views such as
 415         # shortlog or commit will display an avatar associated with
 416         # the email of the committer(s) and/or author(s).
 417
 418         # Currently available providers are gravatar and picon.
 419         # If an unknown provider is specified, the feature is disabled.
 420
 421         # Gravatar depends on Digest::MD5.
 422         # Picon currently relies on the indiana.edu database.
 423
 424         # To enable system wide have in $GITWEB_CONFIG
 425         # $feature{'avatar'}{'default'} = ['<provider>'];
 426         # where <provider> is either gravatar or picon.
 427         # To have project specific config enable override in $GITWEB_CONFIG
 428         # $feature{'avatar'}{'override'} = 1;
 429         # and in project config gitweb.avatar = <provider>;
 430         'avatar' => {
 431                 'sub' => \&feature_avatar,
 432                 'override' => 0,
 433                 'default' => ['']},
 434
 435         # Enable displaying how much time and how many git commands
 436         # it took to generate and display page.  Disabled by default.
 437         # Project specific override is not supported.
 438         'timed' => {
 439                 'override' => 0,
 440                 'default' => [0]},
 441
 442         # Enable turning some links into links to actions which require
 443         # JavaScript to run (like 'blame_incremental').  Not enabled by
 444         # default.  Project specific override is currently not supported.
 445         'javascript-actions' => {
 446                 'override' => 0,
 447                 'default' => [0]},
 448 );
 449
 450 sub gitweb_get_feature {
 451         my ($name) = @_;
 452         return unless exists $feature{$name};
 453         my ($sub, $override, @defaults) = (
 454                 $feature{$name}{'sub'},
 455                 $feature{$name}{'override'},
 456                 @{$feature{$name}{'default'}});
 457         # project specific override is possible only if we have project
 458         our $git_dir; # global variable, declared later
 459         if (!$override || !defined $git_dir) {
 460                 return @defaults;
 461         }
 462         if (!defined $sub) {
 463                 warn "feature $name is not overridable";
 464                 return @defaults;
 465         }
 466         return $sub->(@defaults);
 467 }
 468
 469 # A wrapper to check if a given feature is enabled.
 470 # With this, you can say
 471 #
 472 #   my $bool_feat = gitweb_check_feature('bool_feat');
 473 #   gitweb_check_feature('bool_feat') or somecode;
 474 #
 475 # instead of
 476 #
 477 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 478 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 479 #
 480 sub gitweb_check_feature {
 481         return (gitweb_get_feature(@_))[0];
 482 }
 483
 484
 485 sub feature_bool {
 486         my $key = shift;
 487         my ($val) = git_get_project_config($key, '--bool');
 488
 489         if (!defined $val) {
 490                 return ($_[0]);
 491         } elsif ($val eq 'true') {
 492                 return (1);
 493         } elsif ($val eq 'false') {
 494                 return (0);
 495         }
 496 }
 497
 498 sub feature_snapshot {
 499         my (@fmts) = @_;
 500
 501         my ($val) = git_get_project_config('snapshot');
 502
 503         if ($val) {
 504                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 505         }
 506
 507         return @fmts;
 508 }
 509
 510 sub feature_patches {
 511         my @val = (git_get_project_config('patches', '--int'));
 512
 513         if (@val) {
 514                 return @val;
 515         }
 516
 517         return ($_[0]);
 518 }
 519
 520 sub feature_avatar {
 521         my @val = (git_get_project_config('avatar'));
 522
 523         return @val ? @val : @_;
 524 }
 525
 526 # checking HEAD file with -e is fragile if the repository was
 527 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 528 # and then pruned.
 529 sub check_head_link {
 530         my ($dir) = @_;
 531         my $headfile = "$dir/HEAD";
 532         return ((-e $headfile) ||
 533                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 534 }
 535
 536 sub check_export_ok {
 537         my ($dir) = @_;
 538         return (check_head_link($dir) &&
 539                 (!$export_ok || -e "$dir/$export_ok") &&
 540                 (!$export_auth_hook || $export_auth_hook->($dir)));
 541 }
 542
 543 # process alternate names for backward compatibility
 544 # filter out unsupported (unknown) snapshot formats
 545 sub filter_snapshot_fmts {
 546         my @fmts = @_;
 547
 548         @fmts = map {
 549                 exists $known_snapshot_format_aliases{$_} ?
 550                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 551         @fmts = grep {
 552                 exists $known_snapshot_formats{$_} &&
 553                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 554 }
 555
 556 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 557 our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 558 # die if there are errors parsing config file
 559 if (-e $GITWEB_CONFIG) {
 560         do $GITWEB_CONFIG;
 561         die $@ if $@;
 562 } elsif (-e $GITWEB_CONFIG_SYSTEM) {
 563         do $GITWEB_CONFIG_SYSTEM;
 564         die $@ if $@;
 565 }
 566
 567 # Get loadavg of system, to compare against $maxload.
 568 # Currently it requires '/proc/loadavg' present to get loadavg;
 569 # if it is not present it returns 0, which means no load checking.
 570 sub get_loadavg {
 571         if( -e '/proc/loadavg' ){
 572                 open my $fd, '<', '/proc/loadavg'
 573                         or return 0;
 574                 my @load = split(/\s+/, scalar <$fd>);
 575                 close $fd;
 576
 577                 # The first three columns measure CPU and IO utilization of the last one,
 578                 # five, and 10 minute periods.  The fourth column shows the number of
 579                 # currently running processes and the total number of processes in the m/n
 580                 # format.  The last column displays the last process ID used.
 581                 return $load[0] || 0;
 582         }
 583         # additional checks for load average should go here for things that don't export
 584         # /proc/loadavg
 585
 586         return 0;
 587 }
 588
 589 # version of the core git binary
 590 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 591 $number_of_git_cmds++;
 592
 593 $projects_list ||= $projectroot;
 594
 595 if (defined $maxload && get_loadavg() > $maxload) {
 596         die_error(503, "The load average on the server is too high");
 597 }
 598
 599 # ======================================================================
 600 # input validation and dispatch
 601
 602 # input parameters can be collected from a variety of sources (presently, CGI
 603 # and PATH_INFO), so we define an %input_params hash that collects them all
 604 # together during validation: this allows subsequent uses (e.g. href()) to be
 605 # agnostic of the parameter origin
 606
 607 our %input_params = ();
 608
 609 # input parameters are stored with the long parameter name as key. This will
 610 # also be used in the href subroutine to convert parameters to their CGI
 611 # equivalent, and since the href() usage is the most frequent one, we store
 612 # the name -> CGI key mapping here, instead of the reverse.
 613 #
 614 # XXX: Warning: If you touch this, check the search form for updating,
 615 # too.
 616
 617 our @cgi_param_mapping = (
 618         project => "p",
 619         action => "a",
 620         file_name => "f",
 621         file_parent => "fp",
 622         hash => "h",
 623         hash_parent => "hp",
 624         hash_base => "hb",
 625         hash_parent_base => "hpb",
 626         page => "pg",
 627         order => "o",
 628         searchtext => "s",
 629         searchtype => "st",
 630         snapshot_format => "sf",
 631         extra_options => "opt",
 632         search_use_regexp => "sr",
 633         # this must be last entry (for manipulation from JavaScript)
 634         javascript => "js"
 635 );
 636 our %cgi_param_mapping = @cgi_param_mapping;
 637
 638 # we will also need to know the possible actions, for validation
 639 our %actions = (
 640         "blame" => \&git_blame,
 641         "blame_incremental" => \&git_blame_incremental,
 642         "blame_data" => \&git_blame_data,
 643         "blobdiff" => \&git_blobdiff,
 644         "blobdiff_plain" => \&git_blobdiff_plain,
 645         "blob" => \&git_blob,
 646         "blob_plain" => \&git_blob_plain,
 647         "commitdiff" => \&git_commitdiff,
 648         "commitdiff_plain" => \&git_commitdiff_plain,
 649         "commit" => \&git_commit,
 650         "forks" => \&git_forks,
 651         "heads" => \&git_heads,
 652         "history" => \&git_history,
 653         "log" => \&git_log,
 654         "patch" => \&git_patch,
 655         "patches" => \&git_patches,
 656         "rss" => \&git_rss,
 657         "atom" => \&git_atom,
 658         "search" => \&git_search,
 659         "search_help" => \&git_search_help,
 660         "shortlog" => \&git_shortlog,
 661         "summary" => \&git_summary,
 662         "tag" => \&git_tag,
 663         "tags" => \&git_tags,
 664         "tree" => \&git_tree,
 665         "snapshot" => \&git_snapshot,
 666         "object" => \&git_object,
 667         # those below don't need $project
 668         "opml" => \&git_opml,
 669         "project_list" => \&git_project_list,
 670         "project_index" => \&git_project_index,
 671 );
 672
 673 # finally, we have the hash of allowed extra_options for the commands that
 674 # allow them
 675 our %allowed_options = (
 676         "--no-merges" => [ qw(rss atom log shortlog history) ],
 677 );
 678
 679 # fill %input_params with the CGI parameters. All values except for 'opt'
 680 # should be single values, but opt can be an array. We should probably
 681 # build an array of parameters that can be multi-valued, but since for the time
 682 # being it's only this one, we just single it out
 683 while (my ($name, $symbol) = each %cgi_param_mapping) {
 684         if ($symbol eq 'opt') {
 685                 $input_params{$name} = [ $cgi->param($symbol) ];
 686         } else {
 687                 $input_params{$name} = $cgi->param($symbol);
 688         }
 689 }
 690
 691 # now read PATH_INFO and update the parameter list for missing parameters
 692 sub evaluate_path_info {
 693         return if defined $input_params{'project'};
 694         return if !$path_info;
 695         $path_info =~ s,^/+,,;
 696         return if !$path_info;
 697
 698         # find which part of PATH_INFO is project
 699         my $project = $path_info;
 700         $project =~ s,/+$,,;
 701         while ($project && !check_head_link("$projectroot/$project")) {
 702                 $project =~ s,/*[^/]*$,,;
 703         }
 704         return unless $project;
 705         $input_params{'project'} = $project;
 706
 707         # do not change any parameters if an action is given using the query string
 708         return if $input_params{'action'};
 709         $path_info =~ s,^\Q$project\E/*,,;
 710
 711         # next, check if we have an action
 712         my $action = $path_info;
 713         $action =~ s,/.*$,,;
 714         if (exists $actions{$action}) {
 715                 $path_info =~ s,^$action/*,,;
 716                 $input_params{'action'} = $action;
 717         }
 718
 719         # list of actions that want hash_base instead of hash, but can have no
 720         # pathname (f) parameter
 721         my @wants_base = (
 722                 'tree',
 723                 'history',
 724         );
 725
 726         # we want to catch
 727         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 728         my ($parentrefname, $parentpathname, $refname, $pathname) =
 729                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 730
 731         # first, analyze the 'current' part
 732         if (defined $pathname) {
 733                 # we got "branch:filename" or "branch:dir/"
 734                 # we could use git_get_type(branch:pathname), but:
 735                 # - it needs $git_dir
 736                 # - it does a git() call
 737                 # - the convention of terminating directories with a slash
 738                 #   makes it superfluous
 739                 # - embedding the action in the PATH_INFO would make it even
 740                 #   more superfluous
 741                 $pathname =~ s,^/+,,;
 742                 if (!$pathname || substr($pathname, -1) eq "/") {
 743                         $input_params{'action'} ||= "tree";
 744                         $pathname =~ s,/$,,;
 745                 } else {
 746                         # the default action depends on whether we had parent info
 747                         # or not
 748                         if ($parentrefname) {
 749                                 $input_params{'action'} ||= "blobdiff_plain";
 750                         } else {
 751                                 $input_params{'action'} ||= "blob_plain";
 752                         }
 753                 }
 754                 $input_params{'hash_base'} ||= $refname;
 755                 $input_params{'file_name'} ||= $pathname;
 756         } elsif (defined $refname) {
 757                 # we got "branch". In this case we have to choose if we have to
 758                 # set hash or hash_base.
 759                 #
 760                 # Most of the actions without a pathname only want hash to be
 761                 # set, except for the ones specified in @wants_base that want
 762                 # hash_base instead. It should also be noted that hand-crafted
 763                 # links having 'history' as an action and no pathname or hash
 764                 # set will fail, but that happens regardless of PATH_INFO.
 765                 $input_params{'action'} ||= "shortlog";
 766                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 767                         $input_params{'hash_base'} ||= $refname;
 768                 } else {
 769                         $input_params{'hash'} ||= $refname;
 770                 }
 771         }
 772
 773         # next, handle the 'parent' part, if present
 774         if (defined $parentrefname) {
 775                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 776                 # someproject/blobdiff/oldrev..newrev:/filename
 777                 if ($parentpathname) {
 778                         $parentpathname =~ s,^/+,,;
 779                         $parentpathname =~ s,/$,,;
 780                         $input_params{'file_parent'} ||= $parentpathname;
 781                 } else {
 782                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 783                 }
 784                 # we assume that hash_parent_base is wanted if a path was specified,
 785                 # or if the action wants hash_base instead of hash
 786                 if (defined $input_params{'file_parent'} ||
 787                         grep { $_ eq $input_params{'action'} } @wants_base) {
 788                         $input_params{'hash_parent_base'} ||= $parentrefname;
 789                 } else {
 790                         $input_params{'hash_parent'} ||= $parentrefname;
 791                 }
 792         }
 793
 794         # for the snapshot action, we allow URLs in the form
 795         # $project/snapshot/$hash.ext
 796         # where .ext determines the snapshot and gets removed from the
 797         # passed $refname to provide the $hash.
 798         #
 799         # To be able to tell that $refname includes the format extension, we
 800         # require the following two conditions to be satisfied:
 801         # - the hash input parameter MUST have been set from the $refname part
 802         #   of the URL (i.e. they must be equal)
 803         # - the snapshot format MUST NOT have been defined already (e.g. from
 804         #   CGI parameter sf)
 805         # It's also useless to try any matching unless $refname has a dot,
 806         # so we check for that too
 807         if (defined $input_params{'action'} &&
 808                 $input_params{'action'} eq 'snapshot' &&
 809                 defined $refname && index($refname, '.') != -1 &&
 810                 $refname eq $input_params{'hash'} &&
 811                 !defined $input_params{'snapshot_format'}) {
 812                 # We loop over the known snapshot formats, checking for
 813                 # extensions. Allowed extensions are both the defined suffix
 814                 # (which includes the initial dot already) and the snapshot
 815                 # format key itself, with a prepended dot
 816                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 817                         my $hash = $refname;
 818                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 819                                 next;
 820                         }
 821                         my $sfx = $1;
 822                         # a valid suffix was found, so set the snapshot format
 823                         # and reset the hash parameter
 824                         $input_params{'snapshot_format'} = $fmt;
 825                         $input_params{'hash'} = $hash;
 826                         # we also set the format suffix to the one requested
 827                         # in the URL: this way a request for e.g. .tgz returns
 828                         # a .tgz instead of a .tar.gz
 829                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 830                         last;
 831                 }
 832         }
 833 }
 834 evaluate_path_info();
 835
 836 our $action = $input_params{'action'};
 837 if (defined $action) {
 838         if (!validate_action($action)) {
 839                 die_error(400, "Invalid action parameter");
 840         }
 841 }
 842
 843 # parameters which are pathnames
 844 our $project = $input_params{'project'};
 845 if (defined $project) {
 846         if (!validate_project($project)) {
 847                 undef $project;
 848                 die_error(404, "No such project");
 849         }
 850 }
 851
 852 our $file_name = $input_params{'file_name'};
 853 if (defined $file_name) {
 854         if (!validate_pathname($file_name)) {
 855                 die_error(400, "Invalid file parameter");
 856         }
 857 }
 858
 859 our $file_parent = $input_params{'file_parent'};
 860 if (defined $file_parent) {
 861         if (!validate_pathname($file_parent)) {
 862                 die_error(400, "Invalid file parent parameter");
 863         }
 864 }
 865
 866 # parameters which are refnames
 867 our $hash = $input_params{'hash'};
 868 if (defined $hash) {
 869         if (!validate_refname($hash)) {
 870                 die_error(400, "Invalid hash parameter");
 871         }
 872 }
 873
 874 our $hash_parent = $input_params{'hash_parent'};
 875 if (defined $hash_parent) {
 876         if (!validate_refname($hash_parent)) {
 877                 die_error(400, "Invalid hash parent parameter");
 878         }
 879 }
 880
 881 our $hash_base = $input_params{'hash_base'};
 882 if (defined $hash_base) {
 883         if (!validate_refname($hash_base)) {
 884                 die_error(400, "Invalid hash base parameter");
 885         }
 886 }
 887
 888 our @extra_options = @{$input_params{'extra_options'}};
 889 # @extra_options is always defined, since it can only be (currently) set from
 890 # CGI, and $cgi->param() returns the empty array in array context if the param
 891 # is not set
 892 foreach my $opt (@extra_options) {
 893         if (not exists $allowed_options{$opt}) {
 894                 die_error(400, "Invalid option parameter");
 895         }
 896         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 897                 die_error(400, "Invalid option parameter for this action");
 898         }
 899 }
 900
 901 our $hash_parent_base = $input_params{'hash_parent_base'};
 902 if (defined $hash_parent_base) {
 903         if (!validate_refname($hash_parent_base)) {
 904                 die_error(400, "Invalid hash parent base parameter");
 905         }
 906 }
 907
 908 # other parameters
 909 our $page = $input_params{'page'};
 910 if (defined $page) {
 911         if ($page =~ m/[^0-9]/) {
 912                 die_error(400, "Invalid page parameter");
 913         }
 914 }
 915
 916 our $searchtype = $input_params{'searchtype'};
 917 if (defined $searchtype) {
 918         if ($searchtype =~ m/[^a-z]/) {
 919                 die_error(400, "Invalid searchtype parameter");
 920         }
 921 }
 922
 923 our $search_use_regexp = $input_params{'search_use_regexp'};
 924
 925 our $searchtext = $input_params{'searchtext'};
 926 our $search_regexp;
 927 if (defined $searchtext) {
 928         if (length($searchtext) < 2) {
 929                 die_error(403, "At least two characters are required for search parameter");
 930         }
 931         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 932 }
 933
 934 # path to the current git repository
 935 our $git_dir;
 936 $git_dir = "$projectroot/$project" if $project;
 937
 938 # list of supported snapshot formats
 939 our @snapshot_fmts = gitweb_get_feature('snapshot');
 940 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 941
 942 # check that the avatar feature is set to a known provider name,
 943 # and for each provider check if the dependencies are satisfied.
 944 # if the provider name is invalid or the dependencies are not met,
 945 # reset $git_avatar to the empty string.
 946 our ($git_avatar) = gitweb_get_feature('avatar');
 947 if ($git_avatar eq 'gravatar') {
 948         $git_avatar = '' unless (eval { require Digest::MD5; 1; });
 949 } elsif ($git_avatar eq 'picon') {
 950         # no dependencies
 951 } else {
 952         $git_avatar = '';
 953 }
 954
 955 # dispatch
 956 if (!defined $action) {
 957         if (defined $hash) {
 958                 $action = git_get_type($hash);
 959         } elsif (defined $hash_base && defined $file_name) {
 960                 $action = git_get_type("$hash_base:$file_name");
 961         } elsif (defined $project) {
 962                 $action = 'summary';
 963         } else {
 964                 $action = 'project_list';
 965         }
 966 }
 967 if (!defined($actions{$action})) {
 968         die_error(400, "Unknown action");
 969 }
 970 if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
 971     !$project) {
 972         die_error(400, "Project needed");
 973 }
 974 $actions{$action}->();
 975 exit;
 976
 977 ## ======================================================================
 978 ## action links
 979
 980 sub href {
 981         my %params = @_;
 982         # default is to use -absolute url() i.e. $my_uri
 983         my $href = $params{-full} ? $my_url : $my_uri;
 984
 985         $params{'project'} = $project unless exists $params{'project'};
 986
 987         if ($params{-replay}) {
 988                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 989                         if (!exists $params{$name}) {
 990                                 $params{$name} = $input_params{$name};
 991                         }
 992                 }
 993         }
 994
 995         my $use_pathinfo = gitweb_check_feature('pathinfo');
 996         if ($use_pathinfo and defined $params{'project'}) {
 997                 # try to put as many parameters as possible in PATH_INFO:
 998                 #   - project name
 999                 #   - action
1000                 #   - hash_parent or hash_parent_base:/file_parent
1001                 #   - hash or hash_base:/filename
1002                 #   - the snapshot_format as an appropriate suffix
1003
1004                 # When the script is the root DirectoryIndex for the domain,
1005                 # $href here would be something like http://gitweb.example.com/
1006                 # Thus, we strip any trailing / from $href, to spare us double
1007                 # slashes in the final URL
1008                 $href =~ s,/$,,;
1009
1010                 # Then add the project name, if present
1011                 $href .= "/".esc_url($params{'project'});
1012                 delete $params{'project'};
1013
1014                 # since we destructively absorb parameters, we keep this
1015                 # boolean that remembers if we're handling a snapshot
1016                 my $is_snapshot = $params{'action'} eq 'snapshot';
1017
1018                 # Summary just uses the project path URL, any other action is
1019                 # added to the URL
1020                 if (defined $params{'action'}) {
1021                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
1022                         delete $params{'action'};
1023                 }
1024
1025                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1026                 # stripping nonexistent or useless pieces
1027                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1028                         || $params{'hash_parent'} || $params{'hash'});
1029                 if (defined $params{'hash_base'}) {
1030                         if (defined $params{'hash_parent_base'}) {
1031                                 $href .= esc_url($params{'hash_parent_base'});
1032                                 # skip the file_parent if it's the same as the file_name
1033                                 if (defined $params{'file_parent'}) {
1034                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1035                                                 delete $params{'file_parent'};
1036                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1037                                                 $href .= ":/".esc_url($params{'file_parent'});
1038                                                 delete $params{'file_parent'};
1039                                         }
1040                                 }
1041                                 $href .= "..";
1042                                 delete $params{'hash_parent'};
1043                                 delete $params{'hash_parent_base'};
1044                         } elsif (defined $params{'hash_parent'}) {
1045                                 $href .= esc_url($params{'hash_parent'}). "..";
1046                                 delete $params{'hash_parent'};
1047                         }
1048
1049                         $href .= esc_url($params{'hash_base'});
1050                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1051                                 $href .= ":/".esc_url($params{'file_name'});
1052                                 delete $params{'file_name'};
1053                         }
1054                         delete $params{'hash'};
1055                         delete $params{'hash_base'};
1056                 } elsif (defined $params{'hash'}) {
1057                         $href .= esc_url($params{'hash'});
1058                         delete $params{'hash'};
1059                 }
1060
1061                 # If the action was a snapshot, we can absorb the
1062                 # snapshot_format parameter too
1063                 if ($is_snapshot) {
1064                         my $fmt = $params{'snapshot_format'};
1065                         # snapshot_format should always be defined when href()
1066                         # is called, but just in case some code forgets, we
1067                         # fall back to the default
1068                         $fmt ||= $snapshot_fmts[0];
1069                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1070                         delete $params{'snapshot_format'};
1071                 }
1072         }
1073
1074         # now encode the parameters explicitly
1075         my @result = ();
1076         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1077                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1078                 if (defined $params{$name}) {
1079                         if (ref($params{$name}) eq "ARRAY") {
1080                                 foreach my $par (@{$params{$name}}) {
1081                                         push @result, $symbol . "=" . esc_param($par);
1082                                 }
1083                         } else {
1084                                 push @result, $symbol . "=" . esc_param($params{$name});
1085                         }
1086                 }
1087         }
1088         $href .= "?" . join(';', @result) if scalar @result;
1089
1090         return $href;
1091 }
1092
1093
1094 ## ======================================================================
1095 ## validation, quoting/unquoting and escaping
1096
1097 sub validate_action {
1098         my $input = shift || return undef;
1099         return undef unless exists $actions{$input};
1100         return $input;
1101 }
1102
1103 sub validate_project {
1104         my $input = shift || return undef;
1105         if (!validate_pathname($input) ||
1106                 !(-d "$projectroot/$input") ||
1107                 !check_export_ok("$projectroot/$input") ||
1108                 ($strict_export && !project_in_list($input))) {
1109                 return undef;
1110         } else {
1111                 return $input;
1112         }
1113 }
1114
1115 sub validate_pathname {
1116         my $input = shift || return undef;
1117
1118         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1119         # at the beginning, at the end, and between slashes.
1120         # also this catches doubled slashes
1121         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1122                 return undef;
1123         }
1124         # no null characters
1125         if ($input =~ m!\0!) {
1126                 return undef;
1127         }
1128         return $input;
1129 }
1130
1131 sub validate_refname {
1132         my $input = shift || return undef;
1133
1134         # textual hashes are O.K.
1135         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1136                 return $input;
1137         }
1138         # it must be correct pathname
1139         $input = validate_pathname($input)
1140                 or return undef;
1141         # restrictions on ref name according to git-check-ref-format
1142         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1143                 return undef;
1144         }
1145         return $input;
1146 }
1147
1148 # decode sequences of octets in utf8 into Perl's internal form,
1149 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1150 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1151 sub to_utf8 {
1152         my $str = shift;
1153         if (utf8::valid($str)) {
1154                 utf8::decode($str);
1155                 return $str;
1156         } else {
1157                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1158         }
1159 }
1160
1161 # quote unsafe chars, but keep the slash, even when it's not
1162 # correct, but quoted slashes look too horrible in bookmarks
1163 sub esc_param {
1164         my $str = shift;
1165         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1166         $str =~ s/ /\+/g;
1167         return $str;
1168 }
1169
1170 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1171 sub esc_url {
1172         my $str = shift;
1173         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1174         $str =~ s/\+/%2B/g;
1175         $str =~ s/ /\+/g;
1176         return $str;
1177 }
1178
1179 # replace invalid utf8 character with SUBSTITUTION sequence
1180 sub esc_html {
1181         my $str = shift;
1182         my %opts = @_;
1183
1184         $str = to_utf8($str);
1185         $str = $cgi->escapeHTML($str);
1186         if ($opts{'-nbsp'}) {
1187                 $str =~ s/ /&nbsp;/g;
1188         }
1189         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1190         return $str;
1191 }
1192
1193 # quote control characters and escape filename to HTML
1194 sub esc_path {
1195         my $str = shift;
1196         my %opts = @_;
1197
1198         $str = to_utf8($str);
1199         $str = $cgi->escapeHTML($str);
1200         if ($opts{'-nbsp'}) {
1201                 $str =~ s/ /&nbsp;/g;
1202         }
1203         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1204         return $str;
1205 }
1206
1207 # Make control characters "printable", using character escape codes (CEC)
1208 sub quot_cec {
1209         my $cntrl = shift;
1210         my %opts = @_;
1211         my %es = ( # character escape codes, aka escape sequences
1212                 "\t" => '\t',   # tab            (HT)
1213                 "\n" => '\n',   # line feed      (LF)
1214                 "\r" => '\r',   # carrige return (CR)
1215                 "\f" => '\f',   # form feed      (FF)
1216                 "\b" => '\b',   # backspace      (BS)
1217                 "\a" => '\a',   # alarm (bell)   (BEL)
1218                 "\e" => '\e',   # escape         (ESC)
1219                 "\013" => '\v', # vertical tab   (VT)
1220                 "\000" => '\0', # nul character  (NUL)
1221         );
1222         my $chr = ( (exists $es{$cntrl})
1223                     ? $es{$cntrl}
1224                     : sprintf('\%2x', ord($cntrl)) );
1225         if ($opts{-nohtml}) {
1226                 return $chr;
1227         } else {
1228                 return "<span class=\"cntrl\">$chr</span>";
1229         }
1230 }
1231
1232 # Alternatively use unicode control pictures codepoints,
1233 # Unicode "printable representation" (PR)
1234 sub quot_upr {
1235         my $cntrl = shift;
1236         my %opts = @_;
1237
1238         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1239         if ($opts{-nohtml}) {
1240                 return $chr;
1241         } else {
1242                 return "<span class=\"cntrl\">$chr</span>";
1243         }
1244 }
1245
1246 # git may return quoted and escaped filenames
1247 sub unquote {
1248         my $str = shift;
1249
1250         sub unq {
1251                 my $seq = shift;
1252                 my %es = ( # character escape codes, aka escape sequences
1253                         't' => "\t",   # tab            (HT, TAB)
1254                         'n' => "\n",   # newline        (NL)
1255                         'r' => "\r",   # return         (CR)
1256                         'f' => "\f",   # form feed      (FF)
1257                         'b' => "\b",   # backspace      (BS)
1258                         'a' => "\a",   # alarm (bell)   (BEL)
1259                         'e' => "\e",   # escape         (ESC)
1260                         'v' => "\013", # vertical tab   (VT)
1261                 );
1262
1263                 if ($seq =~ m/^[0-7]{1,3}$/) {
1264                         # octal char sequence
1265                         return chr(oct($seq));
1266                 } elsif (exists $es{$seq}) {
1267                         # C escape sequence, aka character escape code
1268                         return $es{$seq};
1269                 }
1270                 # quoted ordinary character
1271                 return $seq;
1272         }
1273
1274         if ($str =~ m/^"(.*)"$/) {
1275                 # needs unquoting
1276                 $str = $1;
1277                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1278         }
1279         return $str;
1280 }
1281
1282 # escape tabs (convert tabs to spaces)
1283 sub untabify {
1284         my $line = shift;
1285
1286         while ((my $pos = index($line, "\t")) != -1) {
1287                 if (my $count = (8 - ($pos % 8))) {
1288                         my $spaces = ' ' x $count;
1289                         $line =~ s/\t/$spaces/;
1290                 }
1291         }
1292
1293         return $line;
1294 }
1295
1296 sub project_in_list {
1297         my $project = shift;
1298         my @list = git_get_projects_list();
1299         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1300 }
1301
1302 ## ----------------------------------------------------------------------
1303 ## HTML aware string manipulation
1304
1305 # Try to chop given string on a word boundary between position
1306 # $len and $len+$add_len. If there is no word boundary there,
1307 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1308 # (marking chopped part) would be longer than given string.
1309 sub chop_str {
1310         my $str = shift;
1311         my $len = shift;
1312         my $add_len = shift || 10;
1313         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1314
1315         # Make sure perl knows it is utf8 encoded so we don't
1316         # cut in the middle of a utf8 multibyte char.
1317         $str = to_utf8($str);
1318
1319         # allow only $len chars, but don't cut a word if it would fit in $add_len
1320         # if it doesn't fit, cut it if it's still longer than the dots we would add
1321         # remove chopped character entities entirely
1322
1323         # when chopping in the middle, distribute $len into left and right part
1324         # return early if chopping wouldn't make string shorter
1325         if ($where eq 'center') {
1326                 return $str if ($len + 5 >= length($str)); # filler is length 5
1327                 $len = int($len/2);
1328         } else {
1329                 return $str if ($len + 4 >= length($str)); # filler is length 4
1330         }
1331
1332         # regexps: ending and beginning with word part up to $add_len
1333         my $endre = qr/.{$len}\w{0,$add_len}/;
1334         my $begre = qr/\w{0,$add_len}.{$len}/;
1335
1336         if ($where eq 'left') {
1337                 $str =~ m/^(.*?)($begre)$/;
1338                 my ($lead, $body) = ($1, $2);
1339                 if (length($lead) > 4) {
1340                         $lead = " ...";
1341                 }
1342                 return "$lead$body";
1343
1344         } elsif ($where eq 'center') {
1345                 $str =~ m/^($endre)(.*)$/;
1346                 my ($left, $str)  = ($1, $2);
1347                 $str =~ m/^(.*?)($begre)$/;
1348                 my ($mid, $right) = ($1, $2);
1349                 if (length($mid) > 5) {
1350                         $mid = " ... ";
1351                 }
1352                 return "$left$mid$right";
1353
1354         } else {
1355                 $str =~ m/^($endre)(.*)$/;
1356                 my $body = $1;
1357                 my $tail = $2;
1358                 if (length($tail) > 4) {
1359                         $tail = "... ";
1360                 }
1361                 return "$body$tail";
1362         }
1363 }
1364
1365 # takes the same arguments as chop_str, but also wraps a <span> around the
1366 # result with a title attribute if it does get chopped. Additionally, the
1367 # string is HTML-escaped.
1368 sub chop_and_escape_str {
1369         my ($str) = @_;
1370
1371         my $chopped = chop_str(@_);
1372         if ($chopped eq $str) {
1373                 return esc_html($chopped);
1374         } else {
1375                 $str =~ s/[[:cntrl:]]/?/g;
1376                 return $cgi->span({-title=>$str}, esc_html($chopped));
1377         }
1378 }
1379
1380 ## ----------------------------------------------------------------------
1381 ## functions returning short strings
1382
1383 # CSS class for given age value (in seconds)
1384 sub age_class {
1385         my $age = shift;
1386
1387         if (!defined $age) {
1388                 return "noage";
1389         } elsif ($age < 60*60*2) {
1390                 return "age0";
1391         } elsif ($age < 60*60*24*2) {
1392                 return "age1";
1393         } else {
1394                 return "age2";
1395         }
1396 }
1397
1398 # convert age in seconds to "nn units ago" string
1399 sub age_string {
1400         my $age = shift;
1401         my $age_str;
1402
1403         if ($age > 60*60*24*365*2) {
1404                 $age_str = (int $age/60/60/24/365);
1405                 $age_str .= " years ago";
1406         } elsif ($age > 60*60*24*(365/12)*2) {
1407                 $age_str = int $age/60/60/24/(365/12);
1408                 $age_str .= " months ago";
1409         } elsif ($age > 60*60*24*7*2) {
1410                 $age_str = int $age/60/60/24/7;
1411                 $age_str .= " weeks ago";
1412         } elsif ($age > 60*60*24*2) {
1413                 $age_str = int $age/60/60/24;
1414                 $age_str .= " days ago";
1415         } elsif ($age > 60*60*2) {
1416                 $age_str = int $age/60/60;
1417                 $age_str .= " hours ago";
1418         } elsif ($age > 60*2) {
1419                 $age_str = int $age/60;
1420                 $age_str .= " min ago";
1421         } elsif ($age > 2) {
1422                 $age_str = int $age;
1423                 $age_str .= " sec ago";
1424         } else {
1425                 $age_str .= " right now";
1426         }
1427         return $age_str;
1428 }
1429
1430 use constant {
1431         S_IFINVALID => 0030000,
1432         S_IFGITLINK => 0160000,
1433 };
1434
1435 # submodule/subproject, a commit object reference
1436 sub S_ISGITLINK {
1437         my $mode = shift;
1438
1439         return (($mode & S_IFMT) == S_IFGITLINK)
1440 }
1441
1442 # convert file mode in octal to symbolic file mode string
1443 sub mode_str {
1444         my $mode = oct shift;
1445
1446         if (S_ISGITLINK($mode)) {
1447                 return 'm---------';
1448         } elsif (S_ISDIR($mode & S_IFMT)) {
1449                 return 'drwxr-xr-x';
1450         } elsif (S_ISLNK($mode)) {
1451                 return 'lrwxrwxrwx';
1452         } elsif (S_ISREG($mode)) {
1453                 # git cares only about the executable bit
1454                 if ($mode & S_IXUSR) {
1455                         return '-rwxr-xr-x';
1456                 } else {
1457                         return '-rw-r--r--';
1458                 };
1459         } else {
1460                 return '----------';
1461         }
1462 }
1463
1464 # convert file mode in octal to file type string
1465 sub file_type {
1466         my $mode = shift;
1467
1468         if ($mode !~ m/^[0-7]+$/) {
1469                 return $mode;
1470         } else {
1471                 $mode = oct $mode;
1472         }
1473
1474         if (S_ISGITLINK($mode)) {
1475                 return "submodule";
1476         } elsif (S_ISDIR($mode & S_IFMT)) {
1477                 return "directory";
1478         } elsif (S_ISLNK($mode)) {
1479                 return "symlink";
1480         } elsif (S_ISREG($mode)) {
1481                 return "file";
1482         } else {
1483                 return "unknown";
1484         }
1485 }
1486
1487 # convert file mode in octal to file type description string
1488 sub file_type_long {
1489         my $mode = shift;
1490
1491         if ($mode !~ m/^[0-7]+$/) {
1492                 return $mode;
1493         } else {
1494                 $mode = oct $mode;
1495         }
1496
1497         if (S_ISGITLINK($mode)) {
1498                 return "submodule";
1499         } elsif (S_ISDIR($mode & S_IFMT)) {
1500                 return "directory";
1501         } elsif (S_ISLNK($mode)) {
1502                 return "symlink";
1503         } elsif (S_ISREG($mode)) {
1504                 if ($mode & S_IXUSR) {
1505                         return "executable";
1506                 } else {
1507                         return "file";
1508                 };
1509         } else {
1510                 return "unknown";
1511         }
1512 }
1513
1514
1515 ## ----------------------------------------------------------------------
1516 ## functions returning short HTML fragments, or transforming HTML fragments
1517 ## which don't belong to other sections
1518
1519 # format line of commit message.
1520 sub format_log_line_html {
1521         my $line = shift;
1522
1523         $line = esc_html($line, -nbsp=>1);
1524         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1525                 $cgi->a({-href => href(action=>"object", hash=>$1),
1526                                         -class => "text"}, $1);
1527         }eg;
1528
1529         return $line;
1530 }
1531
1532 # format marker of refs pointing to given object
1533
1534 # the destination action is chosen based on object type and current context:
1535 # - for annotated tags, we choose the tag view unless it's the current view
1536 #   already, in which case we go to shortlog view
1537 # - for other refs, we keep the current view if we're in history, shortlog or
1538 #   log view, and select shortlog otherwise
1539 sub format_ref_marker {
1540         my ($refs, $id) = @_;
1541         my $markers = '';
1542
1543         if (defined $refs->{$id}) {
1544                 foreach my $ref (@{$refs->{$id}}) {
1545                         # this code exploits the fact that non-lightweight tags are the
1546                         # only indirect objects, and that they are the only objects for which
1547                         # we want to use tag instead of shortlog as action
1548                         my ($type, $name) = qw();
1549                         my $indirect = ($ref =~ s/\^\{\}$//);
1550                         # e.g. tags/v2.6.11 or heads/next
1551                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1552                                 $type = $1;
1553                                 $name = $2;
1554                         } else {
1555                                 $type = "ref";
1556                                 $name = $ref;
1557                         }
1558
1559                         my $class = $type;
1560                         $class .= " indirect" if $indirect;
1561
1562                         my $dest_action = "shortlog";
1563
1564                         if ($indirect) {
1565                                 $dest_action = "tag" unless $action eq "tag";
1566                         } elsif ($action =~ /^(history|(short)?log)$/) {
1567                                 $dest_action = $action;
1568                         }
1569
1570                         my $dest = "";
1571                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1572                         $dest .= $ref;
1573
1574                         my $link = $cgi->a({
1575                                 -href => href(
1576                                         action=>$dest_action,
1577                                         hash=>$dest
1578                                 )}, $name);
1579
1580                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1581                                 $link . "</span>";
1582                 }
1583         }
1584
1585         if ($markers) {
1586                 return ' <span class="refs">'. $markers . '</span>';
1587         } else {
1588                 return "";
1589         }
1590 }
1591
1592 # format, perhaps shortened and with markers, title line
1593 sub format_subject_html {
1594         my ($long, $short, $href, $extra) = @_;
1595         $extra = '' unless defined($extra);
1596
1597         if (length($short) < length($long)) {
1598                 $long =~ s/[[:cntrl:]]/?/g;
1599                 return $cgi->a({-href => $href, -class => "list subject",
1600                                 -title => to_utf8($long)},
1601                        esc_html($short)) . $extra;
1602         } else {
1603                 return $cgi->a({-href => $href, -class => "list subject"},
1604                        esc_html($long)) . $extra;
1605         }
1606 }
1607
1608 # Rather than recomputing the url for an email multiple times, we cache it
1609 # after the first hit. This gives a visible benefit in views where the avatar
1610 # for the same email is used repeatedly (e.g. shortlog).
1611 # The cache is shared by all avatar engines (currently gravatar only), which
1612 # are free to use it as preferred. Since only one avatar engine is used for any
1613 # given page, there's no risk for cache conflicts.
1614 our %avatar_cache = ();
1615
1616 # Compute the picon url for a given email, by using the picon search service over at
1617 # http://www.cs.indiana.edu/picons/search.html
1618 sub picon_url {
1619         my $email = lc shift;
1620         if (!$avatar_cache{$email}) {
1621                 my ($user, $domain) = split('@', $email);
1622                 $avatar_cache{$email} =
1623                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1624                         "$domain/$user/" .
1625                         "users+domains+unknown/up/single";
1626         }
1627         return $avatar_cache{$email};
1628 }
1629
1630 # Compute the gravatar url for a given email, if it's not in the cache already.
1631 # Gravatar stores only the part of the URL before the size, since that's the
1632 # one computationally more expensive. This also allows reuse of the cache for
1633 # different sizes (for this particular engine).
1634 sub gravatar_url {
1635         my $email = lc shift;
1636         my $size = shift;
1637         $avatar_cache{$email} ||=
1638                 "http://www.gravatar.com/avatar/" .
1639                         Digest::MD5::md5_hex($email) . "?s=";
1640         return $avatar_cache{$email} . $size;
1641 }
1642
1643 # Insert an avatar for the given $email at the given $size if the feature
1644 # is enabled.
1645 sub git_get_avatar {
1646         my ($email, %opts) = @_;
1647         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1648         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1649         $opts{-size} ||= 'default';
1650         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1651         my $url = "";
1652         if ($git_avatar eq 'gravatar') {
1653                 $url = gravatar_url($email, $size);
1654         } elsif ($git_avatar eq 'picon') {
1655                 $url = picon_url($email);
1656         }
1657         # Other providers can be added by extending the if chain, defining $url
1658         # as needed. If no variant puts something in $url, we assume avatars
1659         # are completely disabled/unavailable.
1660         if ($url) {
1661                 return $pre_white .
1662                        "<img width=\"$size\" " .
1663                             "class=\"avatar\" " .
1664                             "src=\"$url\" " .
1665                             "alt=\"\" " .
1666                        "/>" . $post_white;
1667         } else {
1668                 return "";
1669         }
1670 }
1671
1672 sub format_search_author {
1673         my ($author, $searchtype, $displaytext) = @_;
1674         my $have_search = gitweb_check_feature('search');
1675
1676         if ($have_search) {
1677                 my $performed = "";
1678                 if ($searchtype eq 'author') {
1679                         $performed = "authored";
1680                 } elsif ($searchtype eq 'committer') {
1681                         $performed = "committed";
1682                 }
1683
1684                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1685                                 searchtext=>$author,
1686                                 searchtype=>$searchtype), class=>"list",
1687                                 title=>"Search for commits $performed by $author"},
1688                                 $displaytext);
1689
1690         } else {
1691                 return $displaytext;
1692         }
1693 }
1694
1695 # format the author name of the given commit with the given tag
1696 # the author name is chopped and escaped according to the other
1697 # optional parameters (see chop_str).
1698 sub format_author_html {
1699         my $tag = shift;
1700         my $co = shift;
1701         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1702         return "<$tag class=\"author\">" .
1703                format_search_author($co->{'author_name'}, "author",
1704                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1705                        $author) .
1706                "</$tag>";
1707 }
1708
1709 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1710 sub format_git_diff_header_line {
1711         my $line = shift;
1712         my $diffinfo = shift;
1713         my ($from, $to) = @_;
1714
1715         if ($diffinfo->{'nparents'}) {
1716                 # combined diff
1717                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1718                 if ($to->{'href'}) {
1719                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1720                                          esc_path($to->{'file'}));
1721                 } else { # file was deleted (no href)
1722                         $line .= esc_path($to->{'file'});
1723                 }
1724         } else {
1725                 # "ordinary" diff
1726                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1727                 if ($from->{'href'}) {
1728                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1729                                          'a/' . esc_path($from->{'file'}));
1730                 } else { # file was added (no href)
1731                         $line .= 'a/' . esc_path($from->{'file'});
1732                 }
1733                 $line .= ' ';
1734                 if ($to->{'href'}) {
1735                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1736                                          'b/' . esc_path($to->{'file'}));
1737                 } else { # file was deleted
1738                         $line .= 'b/' . esc_path($to->{'file'});
1739                 }
1740         }
1741
1742         return "<div class=\"diff header\">$line</div>\n";
1743 }
1744
1745 # format extended diff header line, before patch itself
1746 sub format_extended_diff_header_line {
1747         my $line = shift;
1748         my $diffinfo = shift;
1749         my ($from, $to) = @_;
1750
1751         # match <path>
1752         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1753                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1754                                        esc_path($from->{'file'}));
1755         }
1756         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1757                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1758                                  esc_path($to->{'file'}));
1759         }
1760         # match single <mode>
1761         if ($line =~ m/\s(\d{6})$/) {
1762                 $line .= '<span class="info"> (' .
1763                          file_type_long($1) .
1764                          ')</span>';
1765         }
1766         # match <hash>
1767         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1768                 # can match only for combined diff
1769                 $line = 'index ';
1770                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1771                         if ($from->{'href'}[$i]) {
1772                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1773                                                   -class=>"hash"},
1774                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1775                         } else {
1776                                 $line .= '0' x 7;
1777                         }
1778                         # separator
1779                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1780                 }
1781                 $line .= '..';
1782                 if ($to->{'href'}) {
1783                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1784                                          substr($diffinfo->{'to_id'},0,7));
1785                 } else {
1786                         $line .= '0' x 7;
1787                 }
1788
1789         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1790                 # can match only for ordinary diff
1791                 my ($from_link, $to_link);
1792                 if ($from->{'href'}) {
1793                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1794                                              substr($diffinfo->{'from_id'},0,7));
1795                 } else {
1796                         $from_link = '0' x 7;
1797                 }
1798                 if ($to->{'href'}) {
1799                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1800                                            substr($diffinfo->{'to_id'},0,7));
1801                 } else {
1802                         $to_link = '0' x 7;
1803                 }
1804                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1805                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1806         }
1807
1808         return $line . "<br/>\n";
1809 }
1810
1811 # format from-file/to-file diff header
1812 sub format_diff_from_to_header {
1813         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1814         my $line;
1815         my $result = '';
1816
1817         $line = $from_line;
1818         #assert($line =~ m/^---/) if DEBUG;
1819         # no extra formatting for "^--- /dev/null"
1820         if (! $diffinfo->{'nparents'}) {
1821                 # ordinary (single parent) diff
1822                 if ($line =~ m!^--- "?a/!) {
1823                         if ($from->{'href'}) {
1824                                 $line = '--- a/' .
1825                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1826                                                 esc_path($from->{'file'}));
1827                         } else {
1828                                 $line = '--- a/' .
1829                                         esc_path($from->{'file'});
1830                         }
1831                 }
1832                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1833
1834         } else {
1835                 # combined diff (merge commit)
1836                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1837                         if ($from->{'href'}[$i]) {
1838                                 $line = '--- ' .
1839                                         $cgi->a({-href=>href(action=>"blobdiff",
1840                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1841                                                              hash_parent_base=>$parents[$i],
1842                                                              file_parent=>$from->{'file'}[$i],
1843                                                              hash=>$diffinfo->{'to_id'},
1844                                                              hash_base=>$hash,
1845                                                              file_name=>$to->{'file'}),
1846                                                  -class=>"path",
1847                                                  -title=>"diff" . ($i+1)},
1848                                                 $i+1) .
1849                                         '/' .
1850                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1851                                                 esc_path($from->{'file'}[$i]));
1852                         } else {
1853                                 $line = '--- /dev/null';
1854                         }
1855                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1856                 }
1857         }
1858
1859         $line = $to_line;
1860         #assert($line =~ m/^\+\+\+/) if DEBUG;
1861         # no extra formatting for "^+++ /dev/null"
1862         if ($line =~ m!^\+\+\+ "?b/!) {
1863                 if ($to->{'href'}) {
1864                         $line = '+++ b/' .
1865                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1866                                         esc_path($to->{'file'}));
1867                 } else {
1868                         $line = '+++ b/' .
1869                                 esc_path($to->{'file'});
1870                 }
1871         }
1872         $result .= qq!<div class="diff to_file">$line</div>\n!;
1873
1874         return $result;
1875 }
1876
1877 # create note for patch simplified by combined diff
1878 sub format_diff_cc_simplified {
1879         my ($diffinfo, @parents) = @_;
1880         my $result = '';
1881
1882         $result .= "<div class=\"diff header\">" .
1883                    "diff --cc ";
1884         if (!is_deleted($diffinfo)) {
1885                 $result .= $cgi->a({-href => href(action=>"blob",
1886                                                   hash_base=>$hash,
1887                                                   hash=>$diffinfo->{'to_id'},
1888                                                   file_name=>$diffinfo->{'to_file'}),
1889                                     -class => "path"},
1890                                    esc_path($diffinfo->{'to_file'}));
1891         } else {
1892                 $result .= esc_path($diffinfo->{'to_file'});
1893         }
1894         $result .= "</div>\n" . # class="diff header"
1895                    "<div class=\"diff nodifferences\">" .
1896                    "Simple merge" .
1897                    "</div>\n"; # class="diff nodifferences"
1898
1899         return $result;
1900 }
1901
1902 # format patch (diff) line (not to be used for diff headers)
1903 sub format_diff_line {
1904         my $line = shift;
1905         my ($from, $to) = @_;
1906         my $diff_class = "";
1907
1908         chomp $line;
1909
1910         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1911                 # combined diff
1912                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1913                 if ($line =~ m/^\@{3}/) {
1914                         $diff_class = " chunk_header";
1915                 } elsif ($line =~ m/^\\/) {
1916                         $diff_class = " incomplete";
1917                 } elsif ($prefix =~ tr/+/+/) {
1918                         $diff_class = " add";
1919                 } elsif ($prefix =~ tr/-/-/) {
1920                         $diff_class = " rem";
1921                 }
1922         } else {
1923                 # assume ordinary diff
1924                 my $char = substr($line, 0, 1);
1925                 if ($char eq '+') {
1926                         $diff_class = " add";
1927                 } elsif ($char eq '-') {
1928                         $diff_class = " rem";
1929                 } elsif ($char eq '@') {
1930                         $diff_class = " chunk_header";
1931                 } elsif ($char eq "\\") {
1932                         $diff_class = " incomplete";
1933                 }
1934         }
1935         $line = untabify($line);
1936         if ($from && $to && $line =~ m/^\@{2} /) {
1937                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1938                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1939
1940                 $from_lines = 0 unless defined $from_lines;
1941                 $to_lines   = 0 unless defined $to_lines;
1942
1943                 if ($from->{'href'}) {
1944                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1945                                              -class=>"list"}, $from_text);
1946                 }
1947                 if ($to->{'href'}) {
1948                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1949                                              -class=>"list"}, $to_text);
1950                 }
1951                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1952                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1953                 return "<div class=\"diff$diff_class\">$line</div>\n";
1954         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1955                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1956                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1957
1958                 @from_text = split(' ', $ranges);
1959                 for (my $i = 0; $i < @from_text; ++$i) {
1960                         ($from_start[$i], $from_nlines[$i]) =
1961                                 (split(',', substr($from_text[$i], 1)), 0);
1962                 }
1963
1964                 $to_text   = pop @from_text;
1965                 $to_start  = pop @from_start;
1966                 $to_nlines = pop @from_nlines;
1967
1968                 $line = "<span class=\"chunk_info\">$prefix ";
1969                 for (my $i = 0; $i < @from_text; ++$i) {
1970                         if ($from->{'href'}[$i]) {
1971                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1972                                                   -class=>"list"}, $from_text[$i]);
1973                         } else {
1974                                 $line .= $from_text[$i];
1975                         }
1976                         $line .= " ";
1977                 }
1978                 if ($to->{'href'}) {
1979                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1980                                           -class=>"list"}, $to_text);
1981                 } else {
1982                         $line .= $to_text;
1983                 }
1984                 $line .= " $prefix</span>" .
1985                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1986                 return "<div class=\"diff$diff_class\">$line</div>\n";
1987         }
1988         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1989 }
1990
1991 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1992 # linked.  Pass the hash of the tree/commit to snapshot.
1993 sub format_snapshot_links {
1994         my ($hash) = @_;
1995         my $num_fmts = @snapshot_fmts;
1996         if ($num_fmts > 1) {
1997                 # A parenthesized list of links bearing format names.
1998                 # e.g. "snapshot (_tar.gz_ _zip_)"
1999                 return "snapshot (" . join(' ', map
2000                         $cgi->a({
2001                                 -href => href(
2002                                         action=>"snapshot",
2003                                         hash=>$hash,
2004                                         snapshot_format=>$_
2005                                 )
2006                         }, $known_snapshot_formats{$_}{'display'})
2007                 , @snapshot_fmts) . ")";
2008         } elsif ($num_fmts == 1) {
2009                 # A single "snapshot" link whose tooltip bears the format name.
2010                 # i.e. "_snapshot_"
2011                 my ($fmt) = @snapshot_fmts;
2012                 return
2013                         $cgi->a({
2014                                 -href => href(
2015                                         action=>"snapshot",
2016                                         hash=>$hash,
2017                                         snapshot_format=>$fmt
2018                                 ),
2019                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2020                         }, "snapshot");
2021         } else { # $num_fmts == 0
2022                 return undef;
2023         }
2024 }
2025
2026 ## ......................................................................
2027 ## functions returning values to be passed, perhaps after some
2028 ## transformation, to other functions; e.g. returning arguments to href()
2029
2030 # returns hash to be passed to href to generate gitweb URL
2031 # in -title key it returns description of link
2032 sub get_feed_info {
2033         my $format = shift || 'Atom';
2034         my %res = (action => lc($format));
2035
2036         # feed links are possible only for project views
2037         return unless (defined $project);
2038         # some views should link to OPML, or to generic project feed,
2039         # or don't have specific feed yet (so they should use generic)
2040         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2041
2042         my $branch;
2043         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2044         # from tag links; this also makes possible to detect branch links
2045         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2046             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2047                 $branch = $1;
2048         }
2049         # find log type for feed description (title)
2050         my $type = 'log';
2051         if (defined $file_name) {
2052                 $type  = "history of $file_name";
2053                 $type .= "/" if ($action eq 'tree');
2054                 $type .= " on '$branch'" if (defined $branch);
2055         } else {
2056                 $type = "log of $branch" if (defined $branch);
2057         }
2058
2059         $res{-title} = $type;
2060         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2061         $res{'file_name'} = $file_name;
2062
2063         return %res;
2064 }
2065
2066 ## ----------------------------------------------------------------------
2067 ## git utility subroutines, invoking git commands
2068
2069 # returns path to the core git executable and the --git-dir parameter as list
2070 sub git_cmd {
2071         $number_of_git_cmds++;
2072         return $GIT, '--git-dir='.$git_dir;
2073 }
2074
2075 # quote the given arguments for passing them to the shell
2076 # quote_command("command", "arg 1", "arg with ' and ! characters")
2077 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2078 # Try to avoid using this function wherever possible.
2079 sub quote_command {
2080         return join(' ',
2081                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2082 }
2083
2084 # get HEAD ref of given project as hash
2085 sub git_get_head_hash {
2086         return git_get_full_hash(shift, 'HEAD');
2087 }
2088
2089 sub git_get_full_hash {
2090         return git_get_hash(@_);
2091 }
2092
2093 sub git_get_short_hash {
2094         return git_get_hash(@_, '--short=7');
2095 }
2096
2097 sub git_get_hash {
2098         my ($project, $hash, @options) = @_;
2099         my $o_git_dir = $git_dir;
2100         my $retval = undef;
2101         $git_dir = "$projectroot/$project";
2102         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2103             '--verify', '-q', @options, $hash) {
2104                 $retval = <$fd>;
2105                 chomp $retval if defined $retval;
2106                 close $fd;
2107         }
2108         if (defined $o_git_dir) {
2109                 $git_dir = $o_git_dir;
2110         }
2111         return $retval;
2112 }
2113
2114 # get type of given object
2115 sub git_get_type {
2116         my $hash = shift;
2117
2118         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2119         my $type = <$fd>;
2120         close $fd or return;
2121         chomp $type;
2122         return $type;
2123 }
2124
2125 # repository configuration
2126 our $config_file = '';
2127 our %config;
2128
2129 # store multiple values for single key as anonymous array reference
2130 # single values stored directly in the hash, not as [ <value> ]
2131 sub hash_set_multi {
2132         my ($hash, $key, $value) = @_;
2133
2134         if (!exists $hash->{$key}) {
2135                 $hash->{$key} = $value;
2136         } elsif (!ref $hash->{$key}) {
2137                 $hash->{$key} = [ $hash->{$key}, $value ];
2138         } else {
2139                 push @{$hash->{$key}}, $value;
2140         }
2141 }
2142
2143 # return hash of git project configuration
2144 # optionally limited to some section, e.g. 'gitweb'
2145 sub git_parse_project_config {
2146         my $section_regexp = shift;
2147         my %config;
2148
2149         local $/ = "\0";
2150
2151         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2152                 or return;
2153
2154         while (my $keyval = <$fh>) {
2155                 chomp $keyval;
2156                 my ($key, $value) = split(/\n/, $keyval, 2);
2157
2158                 hash_set_multi(\%config, $key, $value)
2159                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2160         }
2161         close $fh;
2162
2163         return %config;
2164 }
2165
2166 # convert config value to boolean: 'true' or 'false'
2167 # no value, number > 0, 'true' and 'yes' values are true
2168 # rest of values are treated as false (never as error)
2169 sub config_to_bool {
2170         my $val = shift;
2171
2172         return 1 if !defined $val;             # section.key
2173
2174         # strip leading and trailing whitespace
2175         $val =~ s/^\s+//;
2176         $val =~ s/\s+$//;
2177
2178         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2179                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2180 }
2181
2182 # convert config value to simple decimal number
2183 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2184 # to be multiplied by 1024, 1048576, or 1073741824
2185 sub config_to_int {
2186         my $val = shift;
2187
2188         # strip leading and trailing whitespace
2189         $val =~ s/^\s+//;
2190         $val =~ s/\s+$//;
2191
2192         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2193                 $unit = lc($unit);
2194                 # unknown unit is treated as 1
2195                 return $num * ($unit eq 'g' ? 1073741824 :
2196                                $unit eq 'm' ?    1048576 :
2197                                $unit eq 'k' ?       1024 : 1);
2198         }
2199         return $val;
2200 }
2201
2202 # convert config value to array reference, if needed
2203 sub config_to_multi {
2204         my $val = shift;
2205
2206         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2207 }
2208
2209 sub git_get_project_config {
2210         my ($key, $type) = @_;
2211
2212         return unless defined $git_dir;
2213
2214         # key sanity check
2215         return unless ($key);
2216         $key =~ s/^gitweb\.//;
2217         return if ($key =~ m/\W/);
2218
2219         # type sanity check
2220         if (defined $type) {
2221                 $type =~ s/^--//;
2222                 $type = undef
2223                         unless ($type eq 'bool' || $type eq 'int');
2224         }
2225
2226         # get config
2227         if (!defined $config_file ||
2228             $config_file ne "$git_dir/config") {
2229                 %config = git_parse_project_config('gitweb');
2230                 $config_file = "$git_dir/config";
2231         }
2232
2233         # check if config variable (key) exists
2234         return unless exists $config{"gitweb.$key"};
2235
2236         # ensure given type
2237         if (!defined $type) {
2238                 return $config{"gitweb.$key"};
2239         } elsif ($type eq 'bool') {
2240                 # backward compatibility: 'git config --bool' returns true/false
2241                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2242         } elsif ($type eq 'int') {
2243                 return config_to_int($config{"gitweb.$key"});
2244         }
2245         return $config{"gitweb.$key"};
2246 }
2247
2248 # get hash of given path at given ref
2249 sub git_get_hash_by_path {
2250         my $base = shift;
2251         my $path = shift || return undef;
2252         my $type = shift;
2253
2254         $path =~ s,/+$,,;
2255
2256         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2257                 or die_error(500, "Open git-ls-tree failed");
2258         my $line = <$fd>;
2259         close $fd or return undef;
2260
2261         if (!defined $line) {
2262                 # there is no tree or hash given by $path at $base
2263                 return undef;
2264         }
2265
2266         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2267         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2268         if (defined $type && $type ne $2) {
2269                 # type doesn't match
2270                 return undef;
2271         }
2272         return $3;
2273 }
2274
2275 # get path of entry with given hash at given tree-ish (ref)
2276 # used to get 'from' filename for combined diff (merge commit) for renames
2277 sub git_get_path_by_hash {
2278         my $base = shift || return;
2279         my $hash = shift || return;
2280
2281         local $/ = "\0";
2282
2283         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2284                 or return undef;
2285         while (my $line = <$fd>) {
2286                 chomp $line;
2287
2288                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2289                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2290                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2291                         close $fd;
2292                         return $1;
2293                 }
2294         }
2295         close $fd;
2296         return undef;
2297 }
2298
2299 ## ......................................................................
2300 ## git utility functions, directly accessing git repository
2301
2302 sub git_get_project_description {
2303         my $path = shift;
2304
2305         $git_dir = "$projectroot/$path";
2306         open my $fd, '<', "$git_dir/description"
2307                 or return git_get_project_config('description');
2308         my $descr = <$fd>;
2309         close $fd;
2310         if (defined $descr) {
2311                 chomp $descr;
2312         }
2313         return $descr;
2314 }
2315
2316 sub git_get_project_ctags {
2317         my $path = shift;
2318         my $ctags = {};
2319
2320         $git_dir = "$projectroot/$path";
2321         opendir my $dh, "$git_dir/ctags"
2322                 or return $ctags;
2323         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2324                 open my $ct, '<', $_ or next;
2325                 my $val = <$ct>;
2326                 chomp $val;
2327                 close $ct;
2328                 my $ctag = $_; $ctag =~ s#.*/##;
2329                 $ctags->{$ctag} = $val;
2330         }
2331         closedir $dh;
2332         $ctags;
2333 }
2334
2335 sub git_populate_project_tagcloud {
2336         my $ctags = shift;
2337
2338         # First, merge different-cased tags; tags vote on casing
2339         my %ctags_lc;
2340         foreach (keys %$ctags) {
2341                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2342                 if (not $ctags_lc{lc $_}->{topcount}
2343                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2344                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2345                         $ctags_lc{lc $_}->{topname} = $_;
2346                 }
2347         }
2348
2349         my $cloud;
2350         if (eval { require HTML::TagCloud; 1; }) {
2351                 $cloud = HTML::TagCloud->new;
2352                 foreach (sort keys %ctags_lc) {
2353                         # Pad the title with spaces so that the cloud looks
2354                         # less crammed.
2355                         my $title = $ctags_lc{$_}->{topname};
2356                         $title =~ s/ /&nbsp;/g;
2357                         $title =~ s/^/&nbsp;/g;
2358                         $title =~ s/$/&nbsp;/g;
2359                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2360                 }
2361         } else {
2362                 $cloud = \%ctags_lc;
2363         }
2364         $cloud;
2365 }
2366
2367 sub git_show_project_tagcloud {
2368         my ($cloud, $count) = @_;
2369         print STDERR ref($cloud)."..\n";
2370         if (ref $cloud eq 'HTML::TagCloud') {
2371                 return $cloud->html_and_css($count);
2372         } else {
2373                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2374                 return '<p align="center">' . join (', ', map {
2375                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2376                 } splice(@tags, 0, $count)) . '</p>';
2377         }
2378 }
2379
2380 sub git_get_project_url_list {
2381         my $path = shift;
2382
2383         $git_dir = "$projectroot/$path";
2384         open my $fd, '<', "$git_dir/cloneurl"
2385                 or return wantarray ?
2386                 @{ config_to_multi(git_get_project_config('url')) } :
2387                    config_to_multi(git_get_project_config('url'));
2388         my @git_project_url_list = map { chomp; $_ } <$fd>;
2389         close $fd;
2390
2391         return wantarray ? @git_project_url_list : \@git_project_url_list;
2392 }
2393
2394 sub git_get_projects_list {
2395         my ($filter) = @_;
2396         my @list;
2397
2398         $filter ||= '';
2399         $filter =~ s/\.git$//;
2400
2401         my $check_forks = gitweb_check_feature('forks');
2402
2403         if (-d $projects_list) {
2404                 # search in directory
2405                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2406                 # remove the trailing "/"
2407                 $dir =~ s!/+$!!;
2408                 my $pfxlen = length("$dir");
2409                 my $pfxdepth = ($dir =~ tr!/!!);
2410
2411                 File::Find::find({
2412                         follow_fast => 1, # follow symbolic links
2413                         follow_skip => 2, # ignore duplicates
2414                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2415                         wanted => sub {
2416                                 # skip project-list toplevel, if we get it.
2417                                 return if (m!^[/.]$!);
2418                                 # only directories can be git repositories
2419                                 return unless (-d $_);
2420                                 # don't traverse too deep (Find is super slow on os x)
2421                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2422                                         $File::Find::prune = 1;
2423                                         return;
2424                                 }
2425
2426                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2427                                 # we check related file in $projectroot
2428                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2429                                 if (check_export_ok("$projectroot/$path")) {
2430                                         push @list, { path => $path };
2431                                         $File::Find::prune = 1;
2432                                 }
2433                         },
2434                 }, "$dir");
2435
2436         } elsif (-f $projects_list) {
2437                 # read from file(url-encoded):
2438                 # 'git%2Fgit.git Linus+Torvalds'
2439                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2440                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2441                 my %paths;
2442                 open my $fd, '<', $projects_list or return;
2443         PROJECT:
2444                 while (my $line = <$fd>) {
2445                         chomp $line;
2446                         my ($path, $owner) = split ' ', $line;
2447                         $path = unescape($path);
2448                         $owner = unescape($owner);
2449                         if (!defined $path) {
2450                                 next;
2451                         }
2452                         if ($filter ne '') {
2453                                 # looking for forks;
2454                                 my $pfx = substr($path, 0, length($filter));
2455                                 if ($pfx ne $filter) {
2456                                         next PROJECT;
2457                                 }
2458                                 my $sfx = substr($path, length($filter));
2459                                 if ($sfx !~ /^\/.*\.git$/) {
2460                                         next PROJECT;
2461                                 }
2462                         } elsif ($check_forks) {
2463                         PATH:
2464                                 foreach my $filter (keys %paths) {
2465                                         # looking for forks;
2466                                         my $pfx = substr($path, 0, length($filter));
2467                                         if ($pfx ne $filter) {
2468                                                 next PATH;
2469                                         }
2470                                         my $sfx = substr($path, length($filter));
2471                                         if ($sfx !~ /^\/.*\.git$/) {
2472                                                 next PATH;
2473                                         }
2474                                         # is a fork, don't include it in
2475                                         # the list
2476                                         next PROJECT;
2477                                 }
2478                         }
2479                         if (check_export_ok("$projectroot/$path")) {
2480                                 my $pr = {
2481                                         path => $path,
2482                                         owner => to_utf8($owner),
2483                                 };
2484                                 push @list, $pr;
2485                                 (my $forks_path = $path) =~ s/\.git$//;
2486                                 $paths{$forks_path}++;
2487                         }
2488                 }
2489                 close $fd;
2490         }
2491         return @list;
2492 }
2493
2494 our $gitweb_project_owner = undef;
2495 sub git_get_project_list_from_file {
2496
2497         return if (defined $gitweb_project_owner);
2498
2499         $gitweb_project_owner = {};
2500         # read from file (url-encoded):
2501         # 'git%2Fgit.git Linus+Torvalds'
2502         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2503         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2504         if (-f $projects_list) {
2505                 open(my $fd, '<', $projects_list);
2506                 while (my $line = <$fd>) {
2507                         chomp $line;
2508                         my ($pr, $ow) = split ' ', $line;
2509                         $pr = unescape($pr);
2510                         $ow = unescape($ow);
2511                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2512                 }
2513                 close $fd;
2514         }
2515 }
2516
2517 sub git_get_project_owner {
2518         my $project = shift;
2519         my $owner;
2520
2521         return undef unless $project;
2522         $git_dir = "$projectroot/$project";
2523
2524         if (!defined $gitweb_project_owner) {
2525                 git_get_project_list_from_file();
2526         }
2527
2528         if (exists $gitweb_project_owner->{$project}) {
2529                 $owner = $gitweb_project_owner->{$project};
2530         }
2531         if (!defined $owner){
2532                 $owner = git_get_project_config('owner');
2533         }
2534         if (!defined $owner) {
2535                 $owner = get_file_owner("$git_dir");
2536         }
2537
2538         return $owner;
2539 }
2540
2541 sub git_get_last_activity {
2542         my ($path) = @_;
2543         my $fd;
2544
2545         $git_dir = "$projectroot/$path";
2546         open($fd, "-|", git_cmd(), 'for-each-ref',
2547              '--format=%(committer)',
2548              '--sort=-committerdate',
2549              '--count=1',
2550              'refs/heads') or return;
2551         my $most_recent = <$fd>;
2552         close $fd or return;
2553         if (defined $most_recent &&
2554             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2555                 my $timestamp = $1;
2556                 my $age = time - $timestamp;
2557                 return ($age, age_string($age));
2558         }
2559         return (undef, undef);
2560 }
2561
2562 sub git_get_references {
2563         my $type = shift || "";
2564         my %refs;
2565         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2566         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2567         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2568                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2569                 or return;
2570
2571         while (my $line = <$fd>) {
2572                 chomp $line;
2573                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2574                         if (defined $refs{$1}) {
2575                                 push @{$refs{$1}}, $2;
2576                         } else {
2577                                 $refs{$1} = [ $2 ];
2578                         }
2579                 }
2580         }
2581         close $fd or return;
2582         return \%refs;
2583 }
2584
2585 sub git_get_rev_name_tags {
2586         my $hash = shift || return undef;
2587
2588         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2589                 or return;
2590         my $name_rev = <$fd>;
2591         close $fd;
2592
2593         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2594                 return $1;
2595         } else {
2596                 # catches also '$hash undefined' output
2597                 return undef;
2598         }
2599 }
2600
2601 ## ----------------------------------------------------------------------
2602 ## parse to hash functions
2603
2604 sub parse_date {
2605         my $epoch = shift;
2606         my $tz = shift || "-0000";
2607
2608         my %date;
2609         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2610         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2611         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2612         $date{'hour'} = $hour;
2613         $date{'minute'} = $min;
2614         $date{'mday'} = $mday;
2615         $date{'day'} = $days[$wday];
2616         $date{'month'} = $months[$mon];
2617         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2618                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2619         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2620                              $mday, $months[$mon], $hour ,$min;
2621         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2622                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2623
2624         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2625         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2626         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2627         $date{'hour_local'} = $hour;
2628         $date{'minute_local'} = $min;
2629         $date{'tz_local'} = $tz;
2630         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2631                                   1900+$year, $mon+1, $mday,
2632                                   $hour, $min, $sec, $tz);
2633         return %date;
2634 }
2635
2636 sub parse_tag {
2637         my $tag_id = shift;
2638         my %tag;
2639         my @comment;
2640
2641         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2642         $tag{'id'} = $tag_id;
2643         while (my $line = <$fd>) {
2644                 chomp $line;
2645                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2646                         $tag{'object'} = $1;
2647                 } elsif ($line =~ m/^type (.+)$/) {
2648                         $tag{'type'} = $1;
2649                 } elsif ($line =~ m/^tag (.+)$/) {
2650                         $tag{'name'} = $1;
2651                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2652                         $tag{'author'} = $1;
2653                         $tag{'author_epoch'} = $2;
2654                         $tag{'author_tz'} = $3;
2655                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2656                                 $tag{'author_name'}  = $1;
2657                                 $tag{'author_email'} = $2;
2658                         } else {
2659                                 $tag{'author_name'} = $tag{'author'};
2660                         }
2661                 } elsif ($line =~ m/--BEGIN/) {
2662                         push @comment, $line;
2663                         last;
2664                 } elsif ($line eq "") {
2665                         last;
2666                 }
2667         }
2668         push @comment, <$fd>;
2669         $tag{'comment'} = \@comment;
2670         close $fd or return;
2671         if (!defined $tag{'name'}) {
2672                 return
2673         };
2674         return %tag
2675 }
2676
2677 sub parse_commit_text {
2678         my ($commit_text, $withparents) = @_;
2679         my @commit_lines = split '\n', $commit_text;
2680         my %co;
2681
2682         pop @commit_lines; # Remove '\0'
2683
2684         if (! @commit_lines) {
2685                 return;
2686         }
2687
2688         my $header = shift @commit_lines;
2689         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2690                 return;
2691         }
2692         ($co{'id'}, my @parents) = split ' ', $header;
2693         while (my $line = shift @commit_lines) {
2694                 last if $line eq "\n";
2695                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2696                         $co{'tree'} = $1;
2697                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2698                         push @parents, $1;
2699                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2700                         $co{'author'} = to_utf8($1);
2701                         $co{'author_epoch'} = $2;
2702                         $co{'author_tz'} = $3;
2703                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2704                                 $co{'author_name'}  = $1;
2705                                 $co{'author_email'} = $2;
2706                         } else {
2707                                 $co{'author_name'} = $co{'author'};
2708                         }
2709                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2710                         $co{'committer'} = to_utf8($1);
2711                         $co{'committer_epoch'} = $2;
2712                         $co{'committer_tz'} = $3;
2713                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2714                                 $co{'committer_name'}  = $1;
2715                                 $co{'committer_email'} = $2;
2716                         } else {
2717                                 $co{'committer_name'} = $co{'committer'};
2718                         }
2719                 }
2720         }
2721         if (!defined $co{'tree'}) {
2722                 return;
2723         };
2724         $co{'parents'} = \@parents;
2725         $co{'parent'} = $parents[0];
2726
2727         foreach my $title (@commit_lines) {
2728                 $title =~ s/^    //;
2729                 if ($title ne "") {
2730                         $co{'title'} = chop_str($title, 80, 5);
2731                         # remove leading stuff of merges to make the interesting part visible
2732                         if (length($title) > 50) {
2733                                 $title =~ s/^Automatic //;
2734                                 $title =~ s/^merge (of|with) /Merge ... /i;
2735                                 if (length($title) > 50) {
2736                                         $title =~ s/(http|rsync):\/\///;
2737                                 }
2738                                 if (length($title) > 50) {
2739                                         $title =~ s/(master|www|rsync)\.//;
2740                                 }
2741                                 if (length($title) > 50) {
2742                                         $title =~ s/kernel.org:?//;
2743                                 }
2744                                 if (length($title) > 50) {
2745                                         $title =~ s/\/pub\/scm//;
2746                                 }
2747                         }
2748                         $co{'title_short'} = chop_str($title, 50, 5);
2749                         last;
2750                 }
2751         }
2752         if (! defined $co{'title'} || $co{'title'} eq "") {
2753                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2754         }
2755         # remove added spaces
2756         foreach my $line (@commit_lines) {
2757                 $line =~ s/^    //;
2758         }
2759         $co{'comment'} = \@commit_lines;
2760
2761         my $age = time - $co{'committer_epoch'};
2762         $co{'age'} = $age;
2763         $co{'age_string'} = age_string($age);
2764         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2765         if ($age > 60*60*24*7*2) {
2766                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2767                 $co{'age_string_age'} = $co{'age_string'};
2768         } else {
2769                 $co{'age_string_date'} = $co{'age_string'};
2770                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2771         }
2772         return %co;
2773 }
2774
2775 sub parse_commit {
2776         my ($commit_id) = @_;
2777         my %co;
2778
2779         local $/ = "\0";
2780
2781         open my $fd, "-|", git_cmd(), "rev-list",
2782                 "--parents",
2783                 "--header",
2784                 "--max-count=1",
2785                 $commit_id,
2786                 "--",
2787                 or die_error(500, "Open git-rev-list failed");
2788         %co = parse_commit_text(<$fd>, 1);
2789         close $fd;
2790
2791         return %co;
2792 }
2793
2794 sub parse_commits {
2795         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2796         my @cos;
2797
2798         $maxcount ||= 1;
2799         $skip ||= 0;
2800
2801         local $/ = "\0";
2802
2803         open my $fd, "-|", git_cmd(), "rev-list",
2804                 "--header",
2805                 @args,
2806                 ("--max-count=" . $maxcount),
2807                 ("--skip=" . $skip),
2808                 @extra_options,
2809                 $commit_id,
2810                 "--",
2811                 ($filename ? ($filename) : ())
2812                 or die_error(500, "Open git-rev-list failed");
2813         while (my $line = <$fd>) {
2814                 my %co = parse_commit_text($line);
2815                 push @cos, \%co;
2816         }
2817         close $fd;
2818
2819         return wantarray ? @cos : \@cos;
2820 }
2821
2822 # parse line of git-diff-tree "raw" output
2823 sub parse_difftree_raw_line {
2824         my $line = shift;
2825         my %res;
2826
2827         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2828         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2829         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2830                 $res{'from_mode'} = $1;
2831                 $res{'to_mode'} = $2;
2832                 $res{'from_id'} = $3;
2833                 $res{'to_id'} = $4;
2834                 $res{'status'} = $5;
2835                 $res{'similarity'} = $6;
2836                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2837                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2838                 } else {
2839                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2840                 }
2841         }
2842         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2843         # combined diff (for merge commit)
2844         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2845                 $res{'nparents'}  = length($1);
2846                 $res{'from_mode'} = [ split(' ', $2) ];
2847                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2848                 $res{'from_id'} = [ split(' ', $3) ];
2849                 $res{'to_id'} = pop @{$res{'from_id'}};
2850                 $res{'status'} = [ split('', $4) ];
2851                 $res{'to_file'} = unquote($5);
2852         }
2853         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2854         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2855                 $res{'commit'} = $1;
2856         }
2857
2858         return wantarray ? %res : \%res;
2859 }
2860
2861 # wrapper: return parsed line of git-diff-tree "raw" output
2862 # (the argument might be raw line, or parsed info)
2863 sub parsed_difftree_line {
2864         my $line_or_ref = shift;
2865
2866         if (ref($line_or_ref) eq "HASH") {
2867                 # pre-parsed (or generated by hand)
2868                 return $line_or_ref;
2869         } else {
2870                 return parse_difftree_raw_line($line_or_ref);
2871         }
2872 }
2873
2874 # parse line of git-ls-tree output
2875 sub parse_ls_tree_line {
2876         my $line = shift;
2877         my %opts = @_;
2878         my %res;
2879
2880         if ($opts{'-l'}) {
2881                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
2882                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
2883
2884                 $res{'mode'} = $1;
2885                 $res{'type'} = $2;
2886                 $res{'hash'} = $3;
2887                 $res{'size'} = $4;
2888                 if ($opts{'-z'}) {
2889                         $res{'name'} = $5;
2890                 } else {
2891                         $res{'name'} = unquote($5);
2892                 }
2893         } else {
2894                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2895                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2896
2897                 $res{'mode'} = $1;
2898                 $res{'type'} = $2;
2899                 $res{'hash'} = $3;
2900                 if ($opts{'-z'}) {
2901                         $res{'name'} = $4;
2902                 } else {
2903                         $res{'name'} = unquote($4);
2904                 }
2905         }
2906
2907         return wantarray ? %res : \%res;
2908 }
2909
2910 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2911 sub parse_from_to_diffinfo {
2912         my ($diffinfo, $from, $to, @parents) = @_;
2913
2914         if ($diffinfo->{'nparents'}) {
2915                 # combined diff
2916                 $from->{'file'} = [];
2917                 $from->{'href'} = [];
2918                 fill_from_file_info($diffinfo, @parents)
2919                         unless exists $diffinfo->{'from_file'};
2920                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2921                         $from->{'file'}[$i] =
2922                                 defined $diffinfo->{'from_file'}[$i] ?
2923                                         $diffinfo->{'from_file'}[$i] :
2924                                         $diffinfo->{'to_file'};
2925                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2926                                 $from->{'href'}[$i] = href(action=>"blob",
2927                                                            hash_base=>$parents[$i],
2928                                                            hash=>$diffinfo->{'from_id'}[$i],
2929                                                            file_name=>$from->{'file'}[$i]);
2930                         } else {
2931                                 $from->{'href'}[$i] = undef;
2932                         }
2933                 }
2934         } else {
2935                 # ordinary (not combined) diff
2936                 $from->{'file'} = $diffinfo->{'from_file'};
2937                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2938                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2939                                                hash=>$diffinfo->{'from_id'},
2940                                                file_name=>$from->{'file'});
2941                 } else {
2942                         delete $from->{'href'};
2943                 }
2944         }
2945
2946         $to->{'file'} = $diffinfo->{'to_file'};
2947         if (!is_deleted($diffinfo)) { # file exists in result
2948                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2949                                      hash=>$diffinfo->{'to_id'},
2950                                      file_name=>$to->{'file'});
2951         } else {
2952                 delete $to->{'href'};
2953         }
2954 }
2955
2956 ## ......................................................................
2957 ## parse to array of hashes functions
2958
2959 sub git_get_heads_list {
2960         my $limit = shift;
2961         my @headslist;
2962
2963         open my $fd, '-|', git_cmd(), 'for-each-ref',
2964                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2965                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2966                 'refs/heads'
2967                 or return;
2968         while (my $line = <$fd>) {
2969                 my %ref_item;
2970
2971                 chomp $line;
2972                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2973                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2974                 my ($committer, $epoch, $tz) =
2975                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2976                 $ref_item{'fullname'}  = $name;
2977                 $name =~ s!^refs/heads/!!;
2978
2979                 $ref_item{'name'}  = $name;
2980                 $ref_item{'id'}    = $hash;
2981                 $ref_item{'title'} = $title || '(no commit message)';
2982                 $ref_item{'epoch'} = $epoch;
2983                 if ($epoch) {
2984                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2985                 } else {
2986                         $ref_item{'age'} = "unknown";
2987                 }
2988
2989                 push @headslist, \%ref_item;
2990         }
2991         close $fd;
2992
2993         return wantarray ? @headslist : \@headslist;
2994 }
2995
2996 sub git_get_tags_list {
2997         my $limit = shift;
2998         my @tagslist;
2999
3000         open my $fd, '-|', git_cmd(), 'for-each-ref',
3001                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3002                 '--format=%(objectname) %(objecttype) %(refname) '.
3003                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3004                 'refs/tags'
3005                 or return;
3006         while (my $line = <$fd>) {
3007                 my %ref_item;
3008
3009                 chomp $line;
3010                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3011                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3012                 my ($creator, $epoch, $tz) =
3013                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3014                 $ref_item{'fullname'} = $name;
3015                 $name =~ s!^refs/tags/!!;
3016
3017                 $ref_item{'type'} = $type;
3018                 $ref_item{'id'} = $id;
3019                 $ref_item{'name'} = $name;
3020                 if ($type eq "tag") {
3021                         $ref_item{'subject'} = $title;
3022                         $ref_item{'reftype'} = $reftype;
3023                         $ref_item{'refid'}   = $refid;
3024                 } else {
3025                         $ref_item{'reftype'} = $type;
3026                         $ref_item{'refid'}   = $id;
3027                 }
3028
3029                 if ($type eq "tag" || $type eq "commit") {
3030                         $ref_item{'epoch'} = $epoch;
3031                         if ($epoch) {
3032                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3033                         } else {
3034                                 $ref_item{'age'} = "unknown";
3035                         }
3036                 }
3037
3038                 push @tagslist, \%ref_item;
3039         }
3040         close $fd;
3041
3042         return wantarray ? @tagslist : \@tagslist;
3043 }
3044
3045 ## ----------------------------------------------------------------------
3046 ## filesystem-related functions
3047
3048 sub get_file_owner {
3049         my $path = shift;
3050
3051         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3052         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3053         if (!defined $gcos) {
3054                 return undef;
3055         }
3056         my $owner = $gcos;
3057         $owner =~ s/[,;].*$//;
3058         return to_utf8($owner);
3059 }
3060
3061 # assume that file exists
3062 sub insert_file {
3063         my $filename = shift;
3064
3065         open my $fd, '<', $filename;
3066         print map { to_utf8($_) } <$fd>;
3067         close $fd;
3068 }
3069
3070 ## ......................................................................
3071 ## mimetype related functions
3072
3073 sub mimetype_guess_file {
3074         my $filename = shift;
3075         my $mimemap = shift;
3076         -r $mimemap or return undef;
3077
3078         my %mimemap;
3079         open(my $mh, '<', $mimemap) or return undef;
3080         while (<$mh>) {
3081                 next if m/^#/; # skip comments
3082                 my ($mimetype, $exts) = split(/\t+/);
3083                 if (defined $exts) {
3084                         my @exts = split(/\s+/, $exts);
3085                         foreach my $ext (@exts) {
3086                                 $mimemap{$ext} = $mimetype;
3087                         }
3088                 }
3089         }
3090         close($mh);
3091
3092         $filename =~ /\.([^.]*)$/;
3093         return $mimemap{$1};
3094 }
3095
3096 sub mimetype_guess {
3097         my $filename = shift;
3098         my $mime;
3099         $filename =~ /\./ or return undef;
3100
3101         if ($mimetypes_file) {
3102                 my $file = $mimetypes_file;
3103                 if ($file !~ m!^/!) { # if it is relative path
3104                         # it is relative to project
3105                         $file = "$projectroot/$project/$file";
3106                 }
3107                 $mime = mimetype_guess_file($filename, $file);
3108         }
3109         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3110         return $mime;
3111 }
3112
3113 sub blob_mimetype {
3114         my $fd = shift;
3115         my $filename = shift;
3116
3117         if ($filename) {
3118                 my $mime = mimetype_guess($filename);
3119                 $mime and return $mime;
3120         }
3121
3122         # just in case
3123         return $default_blob_plain_mimetype unless $fd;
3124
3125         if (-T $fd) {
3126                 return 'text/plain';
3127         } elsif (! $filename) {
3128                 return 'application/octet-stream';
3129         } elsif ($filename =~ m/\.png$/i) {
3130                 return 'image/png';
3131         } elsif ($filename =~ m/\.gif$/i) {
3132                 return 'image/gif';
3133         } elsif ($filename =~ m/\.jpe?g$/i) {
3134                 return 'image/jpeg';
3135         } else {
3136                 return 'application/octet-stream';
3137         }
3138 }
3139
3140 sub blob_contenttype {
3141         my ($fd, $file_name, $type) = @_;
3142
3143         $type ||= blob_mimetype($fd, $file_name);
3144         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3145                 $type .= "; charset=$default_text_plain_charset";
3146         }
3147
3148         return $type;
3149 }
3150
3151 ## ======================================================================
3152 ## functions printing HTML: header, footer, error page
3153
3154 sub git_header_html {
3155         my $status = shift || "200 OK";
3156         my $expires = shift;
3157
3158         my $title = "$site_name";
3159         if (defined $project) {
3160                 $title .= " - " . to_utf8($project);
3161                 if (defined $action) {
3162                         $title .= "/$action";
3163                         if (defined $file_name) {
3164                                 $title .= " - " . esc_path($file_name);
3165                                 if ($action eq "tree" && $file_name !~ m|/$|) {
3166                                         $title .= "/";
3167                                 }
3168                         }
3169                 }
3170         }
3171         my $content_type;
3172         # require explicit support from the UA if we are to send the page as
3173         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3174         # we have to do this because MSIE sometimes globs '*/*', pretending to
3175         # support xhtml+xml but choking when it gets what it asked for.
3176         if (defined $cgi->http('HTTP_ACCEPT') &&
3177             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3178             $cgi->Accept('application/xhtml+xml') != 0) {
3179                 $content_type = 'application/xhtml+xml';
3180         } else {
3181                 $content_type = 'text/html';
3182         }
3183         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3184                            -status=> $status, -expires => $expires);
3185         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3186         print <<EOF;
3187 <?xml version="1.0" encoding="utf-8"?>
3188 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3189 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3190 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3191 <!-- git core binaries version $git_version -->
3192 <head>
3193 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3194 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3195 <meta name="robots" content="index, nofollow"/>
3196 <title>$title</title>
3197 EOF
3198         # the stylesheet, favicon etc urls won't work correctly with path_info
3199         # unless we set the appropriate base URL
3200         if ($ENV{'PATH_INFO'}) {
3201                 print "<base href=\"".esc_url($base_url)."\" />\n";
3202         }
3203         # print out each stylesheet that exist, providing backwards capability
3204         # for those people who defined $stylesheet in a config file
3205         if (defined $stylesheet) {
3206                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3207         } else {
3208                 foreach my $stylesheet (@stylesheets) {
3209                         next unless $stylesheet;
3210                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3211                 }
3212         }
3213         if (defined $project) {
3214                 my %href_params = get_feed_info();
3215                 if (!exists $href_params{'-title'}) {
3216                         $href_params{'-title'} = 'log';
3217                 }
3218
3219                 foreach my $format qw(RSS Atom) {
3220                         my $type = lc($format);
3221                         my %link_attr = (
3222                                 '-rel' => 'alternate',
3223                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3224                                 '-type' => "application/$type+xml"
3225                         );
3226
3227                         $href_params{'action'} = $type;
3228                         $link_attr{'-href'} = href(%href_params);
3229                         print "<link ".
3230                               "rel=\"$link_attr{'-rel'}\" ".
3231                               "title=\"$link_attr{'-title'}\" ".
3232                               "href=\"$link_attr{'-href'}\" ".
3233                               "type=\"$link_attr{'-type'}\" ".
3234                               "/>\n";
3235
3236                         $href_params{'extra_options'} = '--no-merges';
3237                         $link_attr{'-href'} = href(%href_params);
3238                         $link_attr{'-title'} .= ' (no merges)';
3239                         print "<link ".
3240                               "rel=\"$link_attr{'-rel'}\" ".
3241                               "title=\"$link_attr{'-title'}\" ".
3242                               "href=\"$link_attr{'-href'}\" ".
3243                               "type=\"$link_attr{'-type'}\" ".
3244                               "/>\n";
3245                 }
3246
3247         } else {
3248                 printf('<link rel="alternate" title="%s projects list" '.
3249                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3250                        $site_name, href(project=>undef, action=>"project_index"));
3251                 printf('<link rel="alternate" title="%s projects feeds" '.
3252                        'href="%s" type="text/x-opml" />'."\n",
3253                        $site_name, href(project=>undef, action=>"opml"));
3254         }
3255         if (defined $favicon) {
3256                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3257         }
3258
3259         print "</head>\n" .
3260               "<body>\n";
3261
3262         if (defined $site_header && -f $site_header) {
3263                 insert_file($site_header);
3264         }
3265
3266         print "<div class=\"page_header\">\n" .
3267               $cgi->a({-href => esc_url($logo_url),
3268                        -title => $logo_label},
3269                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3270         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3271         if (defined $project) {
3272                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3273                 if (defined $action) {
3274                         print " / $action";
3275                 }
3276                 print "\n";
3277         }
3278         print "</div>\n";
3279
3280         my $have_search = gitweb_check_feature('search');
3281         if (defined $project && $have_search) {
3282                 if (!defined $searchtext) {
3283                         $searchtext = "";
3284                 }
3285                 my $search_hash;
3286                 if (defined $hash_base) {
3287                         $search_hash = $hash_base;
3288                 } elsif (defined $hash) {
3289                         $search_hash = $hash;
3290                 } else {
3291                         $search_hash = "HEAD";
3292                 }
3293                 my $action = $my_uri;
3294                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3295                 if ($use_pathinfo) {
3296                         $action .= "/".esc_url($project);
3297                 }
3298                 print $cgi->startform(-method => "get", -action => $action) .
3299                       "<div class=\"search\">\n" .
3300                       (!$use_pathinfo &&
3301                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3302                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3303                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3304                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3305                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3306                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3307                       " search:\n",
3308                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3309                       "<span title=\"Extended regular expression\">" .
3310                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3311                                      -checked => $search_use_regexp) .
3312                       "</span>" .
3313                       "</div>" .
3314                       $cgi->end_form() . "\n";
3315         }
3316 }
3317
3318 sub git_footer_html {
3319         my $feed_class = 'rss_logo';
3320
3321         print "<div class=\"page_footer\">\n";
3322         if (defined $project) {
3323                 my $descr = git_get_project_description($project);
3324                 if (defined $descr) {
3325                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3326                 }
3327
3328                 my %href_params = get_feed_info();
3329                 if (!%href_params) {
3330                         $feed_class .= ' generic';
3331                 }
3332                 $href_params{'-title'} ||= 'log';
3333
3334                 foreach my $format qw(RSS Atom) {
3335                         $href_params{'action'} = lc($format);
3336                         print $cgi->a({-href => href(%href_params),
3337                                       -title => "$href_params{'-title'} $format feed",
3338                                       -class => $feed_class}, $format)."\n";
3339                 }
3340
3341         } else {
3342                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3343                               -class => $feed_class}, "OPML") . " ";
3344                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3345                               -class => $feed_class}, "TXT") . "\n";
3346         }
3347         print "</div>\n"; # class="page_footer"
3348
3349         if (defined $t0 && gitweb_check_feature('timed')) {
3350                 print "<div id=\"generating_info\">\n";
3351                 print 'This page took '.
3352                       '<span id="generating_time" class="time_span">'.
3353                       Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
3354                       ' seconds </span>'.
3355                       ' and '.
3356                       '<span id="generating_cmd">'.
3357                       $number_of_git_cmds.
3358                       '</span> git commands '.
3359                       " to generate.\n";
3360                 print "</div>\n"; # class="page_footer"
3361         }
3362
3363         if (defined $site_footer && -f $site_footer) {
3364                 insert_file($site_footer);
3365         }
3366
3367         print qq!<script type="text/javascript" src="$javascript"></script>\n!;
3368         if (defined $action &&
3369             $action eq 'blame_incremental') {
3370                 print qq!<script type="text/javascript">\n!.
3371                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3372                       qq!           "!. href() .qq!");\n!.
3373                       qq!</script>\n!;
3374         } elsif (gitweb_check_feature('javascript-actions')) {
3375                 print qq!<script type="text/javascript">\n!.
3376                       qq!window.onload = fixLinks;\n!.
3377                       qq!</script>\n!;
3378         }
3379
3380         print "</body>\n" .
3381               "</html>";
3382 }
3383
3384 # die_error(<http_status_code>, <error_message>)
3385 # Example: die_error(404, 'Hash not found')
3386 # By convention, use the following status codes (as defined in RFC 2616):
3387 # 400: Invalid or missing CGI parameters, or
3388 #      requested object exists but has wrong type.
3389 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3390 #      this server or project.
3391 # 404: Requested object/revision/project doesn't exist.
3392 # 500: The server isn't configured properly, or
3393 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3394 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3395 # 503: The server is currently unavailable (because it is overloaded,
3396 #      or down for maintenance).  Generally, this is a temporary state.
3397 sub die_error {
3398         my $status = shift || 500;
3399         my $error = shift || "Internal server error";
3400         my $extra = shift;
3401
3402         my %http_responses = (
3403                 400 => '400 Bad Request',
3404                 403 => '403 Forbidden',
3405                 404 => '404 Not Found',
3406                 500 => '500 Internal Server Error',
3407                 503 => '503 Service Unavailable',
3408         );
3409         git_header_html($http_responses{$status});
3410         print <<EOF;
3411 <div class="page_body">
3412 <br /><br />
3413 $status - $error
3414 <br />
3415 EOF
3416         if (defined $extra) {
3417                 print "<hr />\n" .
3418                       "$extra\n";
3419         }
3420         print "</div>\n";
3421
3422         git_footer_html();
3423         exit;
3424 }
3425
3426 ## ----------------------------------------------------------------------
3427 ## functions printing or outputting HTML: navigation
3428
3429 sub git_print_page_nav {
3430         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3431         $extra = '' if !defined $extra; # pager or formats
3432
3433         my @navs = qw(summary shortlog log commit commitdiff tree);
3434         if ($suppress) {
3435                 @navs = grep { $_ ne $suppress } @navs;
3436         }
3437
3438         my %arg = map { $_ => {action=>$_} } @navs;
3439         if (defined $head) {
3440                 for (qw(commit commitdiff)) {
3441                         $arg{$_}{'hash'} = $head;
3442                 }
3443                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3444                         for (qw(shortlog log)) {
3445                                 $arg{$_}{'hash'} = $head;
3446                         }
3447                 }
3448         }
3449
3450         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3451         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3452
3453         my @actions = gitweb_get_feature('actions');
3454         my %repl = (
3455                 '%' => '%',
3456                 'n' => $project,         # project name
3457                 'f' => $git_dir,         # project path within filesystem
3458                 'h' => $treehead || '',  # current hash ('h' parameter)
3459                 'b' => $treebase || '',  # hash base ('hb' parameter)
3460         );
3461         while (@actions) {
3462                 my ($label, $link, $pos) = splice(@actions,0,3);
3463                 # insert
3464                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3465                 # munch munch
3466                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3467                 $arg{$label}{'_href'} = $link;
3468         }
3469
3470         print "<div class=\"page_nav\">\n" .
3471                 (join " | ",
3472                  map { $_ eq $current ?
3473                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3474                  } @navs);
3475         print "<br/>\n$extra<br/>\n" .
3476               "</div>\n";
3477 }
3478
3479 sub format_paging_nav {
3480         my ($action, $page, $has_next_link) = @_;
3481         my $paging_nav;
3482
3483
3484         if ($page > 0) {
3485                 $paging_nav .=
3486                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3487                         " &sdot; " .
3488                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3489                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3490         } else {
3491                 $paging_nav .= "first &sdot; prev";
3492         }
3493
3494         if ($has_next_link) {
3495                 $paging_nav .= " &sdot; " .
3496                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3497                                  -accesskey => "n", -title => "Alt-n"}, "next");
3498         } else {
3499                 $paging_nav .= " &sdot; next";
3500         }
3501
3502         return $paging_nav;
3503 }
3504
3505 ## ......................................................................
3506 ## functions printing or outputting HTML: div
3507
3508 sub git_print_header_div {
3509         my ($action, $title, $hash, $hash_base) = @_;
3510         my %args = ();
3511
3512         $args{'action'} = $action;
3513         $args{'hash'} = $hash if $hash;
3514         $args{'hash_base'} = $hash_base if $hash_base;
3515
3516         print "<div class=\"header\">\n" .
3517               $cgi->a({-href => href(%args), -class => "title"},
3518               $title ? $title : $action) .
3519               "\n</div>\n";
3520 }
3521
3522 sub print_local_time {
3523         print format_local_time(@_);
3524 }
3525
3526 sub format_local_time {
3527         my $localtime = '';
3528         my %date = @_;
3529         if ($date{'hour_local'} < 6) {
3530                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3531                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3532         } else {
3533                 $localtime .= sprintf(" (%02d:%02d %s)",
3534                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3535         }
3536
3537         return $localtime;
3538 }
3539
3540 # Outputs the author name and date in long form
3541 sub git_print_authorship {
3542         my $co = shift;
3543         my %opts = @_;
3544         my $tag = $opts{-tag} || 'div';
3545         my $author = $co->{'author_name'};
3546
3547         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3548         print "<$tag class=\"author_date\">" .
3549               format_search_author($author, "author", esc_html($author)) .
3550               " [$ad{'rfc2822'}";
3551         print_local_time(%ad) if ($opts{-localtime});
3552         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3553                   . "</$tag>\n";
3554 }
3555
3556 # Outputs table rows containing the full author or committer information,
3557 # in the format expected for 'commit' view (& similia).
3558 # Parameters are a commit hash reference, followed by the list of people
3559 # to output information for. If the list is empty it defalts to both
3560 # author and committer.
3561 sub git_print_authorship_rows {
3562         my $co = shift;
3563         # too bad we can't use @people = @_ || ('author', 'committer')
3564         my @people = @_;
3565         @people = ('author', 'committer') unless @people;
3566         foreach my $who (@people) {
3567                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3568                 print "<tr><td>$who</td><td>" .
3569                       format_search_author($co->{"${who}_name"}, $who,
3570                                esc_html($co->{"${who}_name"})) . " " .
3571                       format_search_author($co->{"${who}_email"}, $who,
3572                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3573                       "</td><td rowspan=\"2\">" .
3574                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3575                       "</td></tr>\n" .
3576                       "<tr>" .
3577                       "<td></td><td> $wd{'rfc2822'}";
3578                 print_local_time(%wd);
3579                 print "</td>" .
3580                       "</tr>\n";
3581         }
3582 }
3583
3584 sub git_print_page_path {
3585         my $name = shift;
3586         my $type = shift;
3587         my $hb = shift;
3588
3589
3590         print "<div class=\"page_path\">";
3591         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3592                       -title => 'tree root'}, to_utf8("[$project]"));
3593         print " / ";
3594         if (defined $name) {
3595                 my @dirname = split '/', $name;
3596                 my $basename = pop @dirname;
3597                 my $fullname = '';
3598
3599                 foreach my $dir (@dirname) {
3600                         $fullname .= ($fullname ? '/' : '') . $dir;
3601                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3602                                                      hash_base=>$hb),
3603                                       -title => $fullname}, esc_path($dir));
3604                         print " / ";
3605                 }
3606                 if (defined $type && $type eq 'blob') {
3607                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3608                                                      hash_base=>$hb),
3609                                       -title => $name}, esc_path($basename));
3610                 } elsif (defined $type && $type eq 'tree') {
3611                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3612                                                      hash_base=>$hb),
3613                                       -title => $name}, esc_path($basename));
3614                         print " / ";
3615                 } else {
3616                         print esc_path($basename);
3617                 }
3618         }
3619         print "<br/></div>\n";
3620 }
3621
3622 sub git_print_log {
3623         my $log = shift;
3624         my %opts = @_;
3625
3626         if ($opts{'-remove_title'}) {
3627                 # remove title, i.e. first line of log
3628                 shift @$log;
3629         }
3630         # remove leading empty lines
3631         while (defined $log->[0] && $log->[0] eq "") {
3632                 shift @$log;
3633         }
3634
3635         # print log
3636         my $signoff = 0;
3637         my $empty = 0;
3638         foreach my $line (@$log) {
3639                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3640                         $signoff = 1;
3641                         $empty = 0;
3642                         if (! $opts{'-remove_signoff'}) {
3643                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3644                                 next;
3645                         } else {
3646                                 # remove signoff lines
3647                                 next;
3648                         }
3649                 } else {
3650                         $signoff = 0;
3651                 }
3652
3653                 # print only one empty line
3654                 # do not print empty line after signoff
3655                 if ($line eq "") {
3656                         next if ($empty || $signoff);
3657                         $empty = 1;
3658                 } else {
3659                         $empty = 0;
3660                 }
3661
3662                 print format_log_line_html($line) . "<br/>\n";
3663         }
3664
3665         if ($opts{'-final_empty_line'}) {
3666                 # end with single empty line
3667                 print "<br/>\n" unless $empty;
3668         }
3669 }
3670
3671 # return link target (what link points to)
3672 sub git_get_link_target {
3673         my $hash = shift;
3674         my $link_target;
3675
3676         # read link
3677         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3678                 or return;
3679         {
3680                 local $/ = undef;
3681                 $link_target = <$fd>;
3682         }
3683         close $fd
3684                 or return;
3685
3686         return $link_target;
3687 }
3688
3689 # given link target, and the directory (basedir) the link is in,
3690 # return target of link relative to top directory (top tree);
3691 # return undef if it is not possible (including absolute links).
3692 sub normalize_link_target {
3693         my ($link_target, $basedir) = @_;
3694
3695         # absolute symlinks (beginning with '/') cannot be normalized
3696         return if (substr($link_target, 0, 1) eq '/');
3697
3698         # normalize link target to path from top (root) tree (dir)
3699         my $path;
3700         if ($basedir) {
3701                 $path = $basedir . '/' . $link_target;
3702         } else {
3703                 # we are in top (root) tree (dir)
3704                 $path = $link_target;
3705         }
3706
3707         # remove //, /./, and /../
3708         my @path_parts;
3709         foreach my $part (split('/', $path)) {
3710                 # discard '.' and ''
3711                 next if (!$part || $part eq '.');
3712                 # handle '..'
3713                 if ($part eq '..') {
3714                         if (@path_parts) {
3715                                 pop @path_parts;
3716                         } else {
3717                                 # link leads outside repository (outside top dir)
3718                                 return;
3719                         }
3720                 } else {
3721                         push @path_parts, $part;
3722                 }
3723         }
3724         $path = join('/', @path_parts);
3725
3726         return $path;
3727 }
3728
3729 # print tree entry (row of git_tree), but without encompassing <tr> element
3730 sub git_print_tree_entry {
3731         my ($t, $basedir, $hash_base, $have_blame) = @_;
3732
3733         my %base_key = ();
3734         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3735
3736         # The format of a table row is: mode list link.  Where mode is
3737         # the mode of the entry, list is the name of the entry, an href,
3738         # and link is the action links of the entry.
3739
3740         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3741         if (exists $t->{'size'}) {
3742                 print "<td class=\"size\">$t->{'size'}</td>\n";
3743         }
3744         if ($t->{'type'} eq "blob") {
3745                 print "<td class=\"list\">" .
3746                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3747                                                file_name=>"$basedir$t->{'name'}", %base_key),
3748                                 -class => "list"}, esc_path($t->{'name'}));
3749                 if (S_ISLNK(oct $t->{'mode'})) {
3750                         my $link_target = git_get_link_target($t->{'hash'});
3751                         if ($link_target) {
3752                                 my $norm_target = normalize_link_target($link_target, $basedir);
3753                                 if (defined $norm_target) {
3754                                         print " -> " .
3755                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3756                                                                      file_name=>$norm_target),
3757                                                        -title => $norm_target}, esc_path($link_target));
3758                                 } else {
3759                                         print " -> " . esc_path($link_target);
3760                                 }
3761                         }
3762                 }
3763                 print "</td>\n";
3764                 print "<td class=\"link\">";
3765                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3766                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3767                               "blob");
3768                 if ($have_blame) {
3769                         print " | " .
3770                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3771                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3772                                       "blame");
3773                 }
3774                 if (defined $hash_base) {
3775                         print " | " .
3776                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3777                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3778                                       "history");
3779                 }
3780                 print " | " .
3781                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3782                                                file_name=>"$basedir$t->{'name'}")},
3783                                 "raw");
3784                 print "</td>\n";
3785
3786         } elsif ($t->{'type'} eq "tree") {
3787                 print "<td class=\"list\">";
3788                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3789                                              file_name=>"$basedir$t->{'name'}",
3790                                              %base_key)},
3791                               esc_path($t->{'name'}));
3792                 print "</td>\n";
3793                 print "<td class=\"link\">";
3794                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3795                                              file_name=>"$basedir$t->{'name'}",
3796                                              %base_key)},
3797                               "tree");
3798                 if (defined $hash_base) {
3799                         print " | " .
3800                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3801                                                      file_name=>"$basedir$t->{'name'}")},
3802                                       "history");
3803                 }
3804                 print "</td>\n";
3805         } else {
3806                 # unknown object: we can only present history for it
3807                 # (this includes 'commit' object, i.e. submodule support)
3808                 print "<td class=\"list\">" .
3809                       esc_path($t->{'name'}) .
3810                       "</td>\n";
3811                 print "<td class=\"link\">";
3812                 if (defined $hash_base) {
3813                         print $cgi->a({-href => href(action=>"history",
3814                                                      hash_base=>$hash_base,
3815                                                      file_name=>"$basedir$t->{'name'}")},
3816                                       "history");
3817                 }
3818                 print "</td>\n";
3819         }
3820 }
3821
3822 ## ......................................................................
3823 ## functions printing large fragments of HTML
3824
3825 # get pre-image filenames for merge (combined) diff
3826 sub fill_from_file_info {
3827         my ($diff, @parents) = @_;
3828
3829         $diff->{'from_file'} = [ ];
3830         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3831         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3832                 if ($diff->{'status'}[$i] eq 'R' ||
3833                     $diff->{'status'}[$i] eq 'C') {
3834                         $diff->{'from_file'}[$i] =
3835                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3836                 }
3837         }
3838
3839         return $diff;
3840 }
3841
3842 # is current raw difftree line of file deletion
3843 sub is_deleted {
3844         my $diffinfo = shift;
3845
3846         return $diffinfo->{'to_id'} eq ('0' x 40);
3847 }
3848
3849 # does patch correspond to [previous] difftree raw line
3850 # $diffinfo  - hashref of parsed raw diff format
3851 # $patchinfo - hashref of parsed patch diff format
3852 #              (the same keys as in $diffinfo)
3853 sub is_patch_split {
3854         my ($diffinfo, $patchinfo) = @_;
3855
3856         return defined $diffinfo && defined $patchinfo
3857                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3858 }
3859
3860
3861 sub git_difftree_body {
3862         my ($difftree, $hash, @parents) = @_;
3863         my ($parent) = $parents[0];
3864         my $have_blame = gitweb_check_feature('blame');
3865         print "<div class=\"list_head\">\n";
3866         if ($#{$difftree} > 10) {
3867                 print(($#{$difftree} + 1) . " files changed:\n");
3868         }
3869         print "</div>\n";
3870
3871         print "<table class=\"" .
3872               (@parents > 1 ? "combined " : "") .
3873               "diff_tree\">\n";
3874
3875         # header only for combined diff in 'commitdiff' view
3876         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3877         if ($has_header) {
3878                 # table header
3879                 print "<thead><tr>\n" .
3880                        "<th></th><th></th>\n"; # filename, patchN link
3881                 for (my $i = 0; $i < @parents; $i++) {
3882                         my $par = $parents[$i];
3883                         print "<th>" .
3884                               $cgi->a({-href => href(action=>"commitdiff",
3885                                                      hash=>$hash, hash_parent=>$par),
3886                                        -title => 'commitdiff to parent number ' .
3887                                                   ($i+1) . ': ' . substr($par,0,7)},
3888                                       $i+1) .
3889                               "&nbsp;</th>\n";
3890                 }
3891                 print "</tr></thead>\n<tbody>\n";
3892         }
3893
3894         my $alternate = 1;
3895         my $patchno = 0;
3896         foreach my $line (@{$difftree}) {
3897                 my $diff = parsed_difftree_line($line);
3898
3899                 if ($alternate) {
3900                         print "<tr class=\"dark\">\n";
3901                 } else {
3902                         print "<tr class=\"light\">\n";
3903                 }
3904                 $alternate ^= 1;
3905
3906                 if (exists $diff->{'nparents'}) { # combined diff
3907
3908                         fill_from_file_info($diff, @parents)
3909                                 unless exists $diff->{'from_file'};
3910
3911                         if (!is_deleted($diff)) {
3912                                 # file exists in the result (child) commit
3913                                 print "<td>" .
3914                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3915                                                              file_name=>$diff->{'to_file'},
3916                                                              hash_base=>$hash),
3917                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3918                                       "</td>\n";
3919                         } else {
3920                                 print "<td>" .
3921                                       esc_path($diff->{'to_file'}) .
3922                                       "</td>\n";
3923                         }
3924
3925                         if ($action eq 'commitdiff') {
3926                                 # link to patch
3927                                 $patchno++;
3928                                 print "<td class=\"link\">" .
3929                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3930                                       " | " .
3931                                       "</td>\n";
3932                         }
3933
3934                         my $has_history = 0;
3935                         my $not_deleted = 0;
3936                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3937                                 my $hash_parent = $parents[$i];
3938                                 my $from_hash = $diff->{'from_id'}[$i];
3939                                 my $from_path = $diff->{'from_file'}[$i];
3940                                 my $status = $diff->{'status'}[$i];
3941
3942                                 $has_history ||= ($status ne 'A');
3943                                 $not_deleted ||= ($status ne 'D');
3944
3945                                 if ($status eq 'A') {
3946                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3947                                 } elsif ($status eq 'D') {
3948                                         print "<td class=\"link\">" .
3949                                               $cgi->a({-href => href(action=>"blob",
3950                                                                      hash_base=>$hash,
3951                                                                      hash=>$from_hash,
3952                                                                      file_name=>$from_path)},
3953                                                       "blob" . ($i+1)) .
3954                                               " | </td>\n";
3955                                 } else {
3956                                         if ($diff->{'to_id'} eq $from_hash) {
3957                                                 print "<td class=\"link nochange\">";
3958                                         } else {
3959                                                 print "<td class=\"link\">";
3960                                         }
3961                                         print $cgi->a({-href => href(action=>"blobdiff",
3962                                                                      hash=>$diff->{'to_id'},
3963                                                                      hash_parent=>$from_hash,
3964                                                                      hash_base=>$hash,
3965                                                                      hash_parent_base=>$hash_parent,
3966                                                                      file_name=>$diff->{'to_file'},
3967                                                                      file_parent=>$from_path)},
3968                                                       "diff" . ($i+1)) .
3969                                               " | </td>\n";
3970                                 }
3971                         }
3972
3973                         print "<td class=\"link\">";
3974                         if ($not_deleted) {
3975                                 print $cgi->a({-href => href(action=>"blob",
3976                                                              hash=>$diff->{'to_id'},
3977                                                              file_name=>$diff->{'to_file'},
3978                                                              hash_base=>$hash)},
3979                                               "blob");
3980                                 print " | " if ($has_history);
3981                         }
3982                         if ($has_history) {
3983                                 print $cgi->a({-href => href(action=>"history",
3984                                                              file_name=>$diff->{'to_file'},
3985                                                              hash_base=>$hash)},
3986                                               "history");
3987                         }
3988                         print "</td>\n";
3989
3990                         print "</tr>\n";
3991                         next; # instead of 'else' clause, to avoid extra indent
3992                 }
3993                 # else ordinary diff
3994
3995                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3996                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3997                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3998                         $to_mode_oct = oct $diff->{'to_mode'};
3999                         if (S_ISREG($to_mode_oct)) { # only for regular file
4000                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4001                         }
4002                         $to_file_type = file_type($diff->{'to_mode'});
4003                 }
4004                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4005                         $from_mode_oct = oct $diff->{'from_mode'};
4006                         if (S_ISREG($to_mode_oct)) { # only for regular file
4007                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4008                         }
4009                         $from_file_type = file_type($diff->{'from_mode'});
4010                 }
4011
4012                 if ($diff->{'status'} eq "A") { # created
4013                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4014                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4015                         $mode_chng   .= "]</span>";
4016                         print "<td>";
4017                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4018                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4019                                       -class => "list"}, esc_path($diff->{'file'}));
4020                         print "</td>\n";
4021                         print "<td>$mode_chng</td>\n";
4022                         print "<td class=\"link\">";
4023                         if ($action eq 'commitdiff') {
4024                                 # link to patch
4025                                 $patchno++;
4026                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4027                                 print " | ";
4028                         }
4029                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4030                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4031                                       "blob");
4032                         print "</td>\n";
4033
4034                 } elsif ($diff->{'status'} eq "D") { # deleted
4035                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4036                         print "<td>";
4037                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4038                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4039                                        -class => "list"}, esc_path($diff->{'file'}));
4040                         print "</td>\n";
4041                         print "<td>$mode_chng</td>\n";
4042                         print "<td class=\"link\">";
4043                         if ($action eq 'commitdiff') {
4044                                 # link to patch
4045                                 $patchno++;
4046                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4047                                 print " | ";
4048                         }
4049                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4050                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4051                                       "blob") . " | ";
4052                         if ($have_blame) {
4053                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4054                                                              file_name=>$diff->{'file'})},
4055                                               "blame") . " | ";
4056                         }
4057                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4058                                                      file_name=>$diff->{'file'})},
4059                                       "history");
4060                         print "</td>\n";
4061
4062                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4063                         my $mode_chnge = "";
4064                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4065                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4066                                 if ($from_file_type ne $to_file_type) {
4067                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4068                                 }
4069                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4070                                         if ($from_mode_str && $to_mode_str) {
4071                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4072                                         } elsif ($to_mode_str) {
4073                                                 $mode_chnge .= " mode: $to_mode_str";
4074                                         }
4075                                 }
4076                                 $mode_chnge .= "]</span>\n";
4077                         }
4078                         print "<td>";
4079                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4080                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4081                                       -class => "list"}, esc_path($diff->{'file'}));
4082                         print "</td>\n";
4083                         print "<td>$mode_chnge</td>\n";
4084                         print "<td class=\"link\">";
4085                         if ($action eq 'commitdiff') {
4086                                 # link to patch
4087                                 $patchno++;
4088                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4089                                       " | ";
4090                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4091                                 # "commit" view and modified file (not onlu mode changed)
4092                                 print $cgi->a({-href => href(action=>"blobdiff",
4093                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4094                                                              hash_base=>$hash, hash_parent_base=>$parent,
4095                                                              file_name=>$diff->{'file'})},
4096                                               "diff") .
4097                                       " | ";
4098                         }
4099                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4100                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4101                                        "blob") . " | ";
4102                         if ($have_blame) {
4103                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4104                                                              file_name=>$diff->{'file'})},
4105                                               "blame") . " | ";
4106                         }
4107                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4108                                                      file_name=>$diff->{'file'})},
4109                                       "history");
4110                         print "</td>\n";
4111
4112                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4113                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4114                         my $nstatus = $status_name{$diff->{'status'}};
4115                         my $mode_chng = "";
4116                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4117                                 # mode also for directories, so we cannot use $to_mode_str
4118                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4119                         }
4120                         print "<td>" .
4121                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4122                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4123                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4124                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4125                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4126                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4127                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4128                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4129                               "<td class=\"link\">";
4130                         if ($action eq 'commitdiff') {
4131                                 # link to patch
4132                                 $patchno++;
4133                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4134                                       " | ";
4135                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4136                                 # "commit" view and modified file (not only pure rename or copy)
4137                                 print $cgi->a({-href => href(action=>"blobdiff",
4138                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4139                                                              hash_base=>$hash, hash_parent_base=>$parent,
4140                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4141                                               "diff") .
4142                                       " | ";
4143                         }
4144                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4145                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4146                                       "blob") . " | ";
4147                         if ($have_blame) {
4148                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4149                                                              file_name=>$diff->{'to_file'})},
4150                                               "blame") . " | ";
4151                         }
4152                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4153                                                     file_name=>$diff->{'to_file'})},
4154                                       "history");
4155                         print "</td>\n";
4156
4157                 } # we should not encounter Unmerged (U) or Unknown (X) status
4158                 print "</tr>\n";
4159         }
4160         print "</tbody>" if $has_header;
4161         print "</table>\n";
4162 }
4163
4164 sub git_patchset_body {
4165         my ($fd, $difftree, $hash, @hash_parents) = @_;
4166         my ($hash_parent) = $hash_parents[0];
4167
4168         my $is_combined = (@hash_parents > 1);
4169         my $patch_idx = 0;
4170         my $patch_number = 0;
4171         my $patch_line;
4172         my $diffinfo;
4173         my $to_name;
4174         my (%from, %to);
4175
4176         print "<div class=\"patchset\">\n";
4177
4178         # skip to first patch
4179         while ($patch_line = <$fd>) {
4180                 chomp $patch_line;
4181
4182                 last if ($patch_line =~ m/^diff /);
4183         }
4184
4185  PATCH:
4186         while ($patch_line) {
4187
4188                 # parse "git diff" header line
4189                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4190                         # $1 is from_name, which we do not use
4191                         $to_name = unquote($2);
4192                         $to_name =~ s!^b/!!;
4193                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4194                         # $1 is 'cc' or 'combined', which we do not use
4195                         $to_name = unquote($2);
4196                 } else {
4197                         $to_name = undef;
4198                 }
4199
4200                 # check if current patch belong to current raw line
4201                 # and parse raw git-diff line if needed
4202                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4203                         # this is continuation of a split patch
4204                         print "<div class=\"patch cont\">\n";
4205                 } else {
4206                         # advance raw git-diff output if needed
4207                         $patch_idx++ if defined $diffinfo;
4208
4209                         # read and prepare patch information
4210                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4211
4212                         # compact combined diff output can have some patches skipped
4213                         # find which patch (using pathname of result) we are at now;
4214                         if ($is_combined) {
4215                                 while ($to_name ne $diffinfo->{'to_file'}) {
4216                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4217                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4218                                               "</div>\n";  # class="patch"
4219
4220                                         $patch_idx++;
4221                                         $patch_number++;
4222
4223                                         last if $patch_idx > $#$difftree;
4224                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4225                                 }
4226                         }
4227
4228                         # modifies %from, %to hashes
4229                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4230
4231                         # this is first patch for raw difftree line with $patch_idx index
4232                         # we index @$difftree array from 0, but number patches from 1
4233                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4234                 }
4235
4236                 # git diff header
4237                 #assert($patch_line =~ m/^diff /) if DEBUG;
4238                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4239                 $patch_number++;
4240                 # print "git diff" header
4241                 print format_git_diff_header_line($patch_line, $diffinfo,
4242                                                   \%from, \%to);
4243
4244                 # print extended diff header
4245                 print "<div class=\"diff extended_header\">\n";
4246         EXTENDED_HEADER:
4247                 while ($patch_line = <$fd>) {
4248                         chomp $patch_line;
4249
4250                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4251
4252                         print format_extended_diff_header_line($patch_line, $diffinfo,
4253                                                                \%from, \%to);
4254                 }
4255                 print "</div>\n"; # class="diff extended_header"
4256
4257                 # from-file/to-file diff header
4258                 if (! $patch_line) {
4259                         print "</div>\n"; # class="patch"
4260                         last PATCH;
4261                 }
4262                 next PATCH if ($patch_line =~ m/^diff /);
4263                 #assert($patch_line =~ m/^---/) if DEBUG;
4264
4265                 my $last_patch_line = $patch_line;
4266                 $patch_line = <$fd>;
4267                 chomp $patch_line;
4268                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4269
4270                 print format_diff_from_to_header($last_patch_line, $patch_line,
4271                                                  $diffinfo, \%from, \%to,
4272                                                  @hash_parents);
4273
4274                 # the patch itself
4275         LINE:
4276                 while ($patch_line = <$fd>) {
4277                         chomp $patch_line;
4278
4279                         next PATCH if ($patch_line =~ m/^diff /);
4280
4281                         print format_diff_line($patch_line, \%from, \%to);
4282                 }
4283
4284         } continue {
4285                 print "</div>\n"; # class="patch"
4286         }
4287
4288         # for compact combined (--cc) format, with chunk and patch simpliciaction
4289         # patchset might be empty, but there might be unprocessed raw lines
4290         for (++$patch_idx if $patch_number > 0;
4291              $patch_idx < @$difftree;
4292              ++$patch_idx) {
4293                 # read and prepare patch information
4294                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4295
4296                 # generate anchor for "patch" links in difftree / whatchanged part
4297                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4298                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4299                       "</div>\n";  # class="patch"
4300
4301                 $patch_number++;
4302         }
4303
4304         if ($patch_number == 0) {
4305                 if (@hash_parents > 1) {
4306                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4307                 } else {
4308                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4309                 }
4310         }
4311
4312         print "</div>\n"; # class="patchset"
4313 }
4314
4315 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4316
4317 # fills project list info (age, description, owner, forks) for each
4318 # project in the list, removing invalid projects from returned list
4319 # NOTE: modifies $projlist, but does not remove entries from it
4320 sub fill_project_list_info {
4321         my ($projlist, $check_forks) = @_;
4322         my @projects;
4323
4324         my $show_ctags = gitweb_check_feature('ctags');
4325  PROJECT:
4326         foreach my $pr (@$projlist) {
4327                 my (@activity) = git_get_last_activity($pr->{'path'});
4328                 unless (@activity) {
4329                         next PROJECT;
4330                 }
4331                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4332                 if (!defined $pr->{'descr'}) {
4333                         my $descr = git_get_project_description($pr->{'path'}) || "";
4334                         $descr = to_utf8($descr);
4335                         $pr->{'descr_long'} = $descr;
4336                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4337                 }
4338                 if (!defined $pr->{'owner'}) {
4339                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4340                 }
4341                 if ($check_forks) {
4342                         my $pname = $pr->{'path'};
4343                         if (($pname =~ s/\.git$//) &&
4344                             ($pname !~ /\/$/) &&
4345                             (-d "$projectroot/$pname")) {
4346                                 $pr->{'forks'} = "-d $projectroot/$pname";
4347                         } else {
4348                                 $pr->{'forks'} = 0;
4349                         }
4350                 }
4351                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4352                 push @projects, $pr;
4353         }
4354
4355         return @projects;
4356 }
4357
4358 # print 'sort by' <th> element, generating 'sort by $name' replay link
4359 # if that order is not selected
4360 sub print_sort_th {
4361         print format_sort_th(@_);
4362 }
4363
4364 sub format_sort_th {
4365         my ($name, $order, $header) = @_;
4366         my $sort_th = "";
4367         $header ||= ucfirst($name);
4368
4369         if ($order eq $name) {
4370                 $sort_th .= "<th>$header</th>\n";
4371         } else {
4372                 $sort_th .= "<th>" .
4373                             $cgi->a({-href => href(-replay=>1, order=>$name),
4374                                      -class => "header"}, $header) .
4375                             "</th>\n";
4376         }
4377
4378         return $sort_th;
4379 }
4380
4381 sub git_project_list_body {
4382         # actually uses global variable $project
4383         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4384
4385         my $check_forks = gitweb_check_feature('forks');
4386         my @projects = fill_project_list_info($projlist, $check_forks);
4387
4388         $order ||= $default_projects_order;
4389         $from = 0 unless defined $from;
4390         $to = $#projects if (!defined $to || $#projects < $to);
4391
4392         my %order_info = (
4393                 project => { key => 'path', type => 'str' },
4394                 descr => { key => 'descr_long', type => 'str' },
4395                 owner => { key => 'owner', type => 'str' },
4396                 age => { key => 'age', type => 'num' }
4397         );
4398         my $oi = $order_info{$order};
4399         if ($oi->{'type'} eq 'str') {
4400                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4401         } else {
4402                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4403         }
4404
4405         my $show_ctags = gitweb_check_feature('ctags');
4406         if ($show_ctags) {
4407                 my %ctags;
4408                 foreach my $p (@projects) {
4409                         foreach my $ct (keys %{$p->{'ctags'}}) {
4410                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4411                         }
4412                 }
4413                 my $cloud = git_populate_project_tagcloud(\%ctags);
4414                 print git_show_project_tagcloud($cloud, 64);
4415         }
4416
4417         print "<table class=\"project_list\">\n";
4418         unless ($no_header) {
4419                 print "<tr>\n";
4420                 if ($check_forks) {
4421                         print "<th></th>\n";
4422                 }
4423                 print_sort_th('project', $order, 'Project');
4424                 print_sort_th('descr', $order, 'Description');
4425                 print_sort_th('owner', $order, 'Owner');
4426                 print_sort_th('age', $order, 'Last Change');
4427                 print "<th></th>\n" . # for links
4428                       "</tr>\n";
4429         }
4430         my $alternate = 1;
4431         my $tagfilter = $cgi->param('by_tag');
4432         for (my $i = $from; $i <= $to; $i++) {
4433                 my $pr = $projects[$i];
4434
4435                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4436                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4437                         and not $pr->{'descr_long'} =~ /$searchtext/;
4438                 # Weed out forks or non-matching entries of search
4439                 if ($check_forks) {
4440                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4441                         $forkbase="^$forkbase" if $forkbase;
4442                         next if not $searchtext and not $tagfilter and $show_ctags
4443                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4444                 }
4445
4446                 if ($alternate) {
4447                         print "<tr class=\"dark\">\n";
4448                 } else {
4449                         print "<tr class=\"light\">\n";
4450                 }
4451                 $alternate ^= 1;
4452                 if ($check_forks) {
4453                         print "<td>";
4454                         if ($pr->{'forks'}) {
4455                                 print "<!-- $pr->{'forks'} -->\n";
4456                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4457                         }
4458                         print "</td>\n";
4459                 }
4460                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4461                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4462                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4463                                         -class => "list", -title => $pr->{'descr_long'}},
4464                                         esc_html($pr->{'descr'})) . "</td>\n" .
4465                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4466                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4467                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4468                       "<td class=\"link\">" .
4469                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4470                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4471                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4472                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4473                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4474                       "</td>\n" .
4475                       "</tr>\n";
4476         }
4477         if (defined $extra) {
4478                 print "<tr>\n";
4479                 if ($check_forks) {
4480                         print "<td></td>\n";
4481                 }
4482                 print "<td colspan=\"5\">$extra</td>\n" .
4483                       "</tr>\n";
4484         }
4485         print "</table>\n";
4486 }
4487
4488 sub git_log_body {
4489         # uses global variable $project
4490         my ($commitlist, $from, $to, $refs, $extra) = @_;
4491
4492         $from = 0 unless defined $from;
4493         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4494
4495         for (my $i = 0; $i <= $to; $i++) {
4496                 my %co = %{$commitlist->[$i]};
4497                 next if !%co;
4498                 my $commit = $co{'id'};
4499                 my $ref = format_ref_marker($refs, $commit);
4500                 my %ad = parse_date($co{'author_epoch'});
4501                 git_print_header_div('commit',
4502                                "<span class=\"age\">$co{'age_string'}</span>" .
4503                                esc_html($co{'title'}) . $ref,
4504                                $commit);
4505                 print "<div class=\"title_text\">\n" .
4506                       "<div class=\"log_link\">\n" .
4507                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4508                       " | " .
4509                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4510                       " | " .
4511                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4512                       "<br/>\n" .
4513                       "</div>\n";
4514                       git_print_authorship(\%co, -tag => 'span');
4515                       print "<br/>\n</div>\n";
4516
4517                 print "<div class=\"log_body\">\n";
4518                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4519                 print "</div>\n";
4520         }
4521         if ($extra) {
4522                 print "<div class=\"page_nav\">\n";
4523                 print "$extra\n";
4524                 print "</div>\n";
4525         }
4526 }
4527
4528 sub git_shortlog_body {
4529         # uses global variable $project
4530         my ($commitlist, $from, $to, $refs, $extra) = @_;
4531
4532         $from = 0 unless defined $from;
4533         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4534
4535         print "<table class=\"shortlog\">\n";
4536         my $alternate = 1;
4537         for (my $i = $from; $i <= $to; $i++) {
4538                 my %co = %{$commitlist->[$i]};
4539                 my $commit = $co{'id'};
4540                 my $ref = format_ref_marker($refs, $commit);
4541                 if ($alternate) {
4542                         print "<tr class=\"dark\">\n";
4543                 } else {
4544                         print "<tr class=\"light\">\n";
4545                 }
4546                 $alternate ^= 1;
4547                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4548                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4549                       format_author_html('td', \%co, 10) . "<td>";
4550                 print format_subject_html($co{'title'}, $co{'title_short'},
4551                                           href(action=>"commit", hash=>$commit), $ref);
4552                 print "</td>\n" .
4553                       "<td class=\"link\">" .
4554                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4555                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4556                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4557                 my $snapshot_links = format_snapshot_links($commit);
4558                 if (defined $snapshot_links) {
4559                         print " | " . $snapshot_links;
4560                 }
4561                 print "</td>\n" .
4562                       "</tr>\n";
4563         }
4564         if (defined $extra) {
4565                 print "<tr>\n" .
4566                       "<td colspan=\"4\">$extra</td>\n" .
4567                       "</tr>\n";
4568         }
4569         print "</table>\n";
4570 }
4571
4572 sub git_history_body {
4573         # Warning: assumes constant type (blob or tree) during history
4574         my ($commitlist, $from, $to, $refs, $extra,
4575             $file_name, $file_hash, $ftype) = @_;
4576
4577         $from = 0 unless defined $from;
4578         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4579
4580         print "<table class=\"history\">\n";
4581         my $alternate = 1;
4582         for (my $i = $from; $i <= $to; $i++) {
4583                 my %co = %{$commitlist->[$i]};
4584                 if (!%co) {
4585                         next;
4586                 }
4587                 my $commit = $co{'id'};
4588
4589                 my $ref = format_ref_marker($refs, $commit);
4590
4591                 if ($alternate) {
4592                         print "<tr class=\"dark\">\n";
4593                 } else {
4594                         print "<tr class=\"light\">\n";
4595                 }
4596                 $alternate ^= 1;
4597                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4598         # shortlog:   format_author_html('td', \%co, 10)
4599                       format_author_html('td', \%co, 15, 3) . "<td>";
4600                 # originally git_history used chop_str($co{'title'}, 50)
4601                 print format_subject_html($co{'title'}, $co{'title_short'},
4602                                           href(action=>"commit", hash=>$commit), $ref);
4603                 print "</td>\n" .
4604                       "<td class=\"link\">" .
4605                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4606                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4607
4608                 if ($ftype eq 'blob') {
4609                         my $blob_current = $file_hash;
4610                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4611                         if (defined $blob_current && defined $blob_parent &&
4612                                         $blob_current ne $blob_parent) {
4613                                 print " | " .
4614                                         $cgi->a({-href => href(action=>"blobdiff",
4615                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4616                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4617                                                                file_name=>$file_name)},
4618                                                 "diff to current");
4619                         }
4620                 }
4621                 print "</td>\n" .
4622                       "</tr>\n";
4623         }
4624         if (defined $extra) {
4625                 print "<tr>\n" .
4626                       "<td colspan=\"4\">$extra</td>\n" .
4627                       "</tr>\n";
4628         }
4629         print "</table>\n";
4630 }
4631
4632 sub git_tags_body {
4633         # uses global variable $project
4634         my ($taglist, $from, $to, $extra) = @_;
4635         $from = 0 unless defined $from;
4636         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4637
4638         print "<table class=\"tags\">\n";
4639         my $alternate = 1;
4640         for (my $i = $from; $i <= $to; $i++) {
4641                 my $entry = $taglist->[$i];
4642                 my %tag = %$entry;
4643                 my $comment = $tag{'subject'};
4644                 my $comment_short;
4645                 if (defined $comment) {
4646                         $comment_short = chop_str($comment, 30, 5);
4647                 }
4648                 if ($alternate) {
4649                         print "<tr class=\"dark\">\n";
4650                 } else {
4651                         print "<tr class=\"light\">\n";
4652                 }
4653                 $alternate ^= 1;
4654                 if (defined $tag{'age'}) {
4655                         print "<td><i>$tag{'age'}</i></td>\n";
4656                 } else {
4657                         print "<td></td>\n";
4658                 }
4659                 print "<td>" .
4660                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4661                                -class => "list name"}, esc_html($tag{'name'})) .
4662                       "</td>\n" .
4663                       "<td>";
4664                 if (defined $comment) {
4665                         print format_subject_html($comment, $comment_short,
4666                                                   href(action=>"tag", hash=>$tag{'id'}));
4667                 }
4668                 print "</td>\n" .
4669                       "<td class=\"selflink\">";
4670                 if ($tag{'type'} eq "tag") {
4671                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4672                 } else {
4673                         print "&nbsp;";
4674                 }
4675                 print "</td>\n" .
4676                       "<td class=\"link\">" . " | " .
4677                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4678                 if ($tag{'reftype'} eq "commit") {
4679                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4680                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4681                 } elsif ($tag{'reftype'} eq "blob") {
4682                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4683                 }
4684                 print "</td>\n" .
4685                       "</tr>";
4686         }
4687         if (defined $extra) {
4688                 print "<tr>\n" .
4689                       "<td colspan=\"5\">$extra</td>\n" .
4690                       "</tr>\n";
4691         }
4692         print "</table>\n";
4693 }
4694
4695 sub git_heads_body {
4696         # uses global variable $project
4697         my ($headlist, $head, $from, $to, $extra) = @_;
4698         $from = 0 unless defined $from;
4699         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4700
4701         print "<table class=\"heads\">\n";
4702         my $alternate = 1;
4703         for (my $i = $from; $i <= $to; $i++) {
4704                 my $entry = $headlist->[$i];
4705                 my %ref = %$entry;
4706                 my $curr = $ref{'id'} eq $head;
4707                 if ($alternate) {
4708                         print "<tr class=\"dark\">\n";
4709                 } else {
4710                         print "<tr class=\"light\">\n";
4711                 }
4712                 $alternate ^= 1;
4713                 print "<td><i>$ref{'age'}</i></td>\n" .
4714                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4715                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4716                                -class => "list name"},esc_html($ref{'name'})) .
4717                       "</td>\n" .
4718                       "<td class=\"link\">" .
4719                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4720                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4721                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4722                       "</td>\n" .
4723                       "</tr>";
4724         }
4725         if (defined $extra) {
4726                 print "<tr>\n" .
4727                       "<td colspan=\"3\">$extra</td>\n" .
4728                       "</tr>\n";
4729         }
4730         print "</table>\n";
4731 }
4732
4733 sub git_search_grep_body {
4734         my ($commitlist, $from, $to, $extra) = @_;
4735         $from = 0 unless defined $from;
4736         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4737
4738         print "<table class=\"commit_search\">\n";
4739         my $alternate = 1;
4740         for (my $i = $from; $i <= $to; $i++) {
4741                 my %co = %{$commitlist->[$i]};
4742                 if (!%co) {
4743                         next;
4744                 }
4745                 my $commit = $co{'id'};
4746                 if ($alternate) {
4747                         print "<tr class=\"dark\">\n";
4748                 } else {
4749                         print "<tr class=\"light\">\n";
4750                 }
4751                 $alternate ^= 1;
4752                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4753                       format_author_html('td', \%co, 15, 5) .
4754                       "<td>" .
4755                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4756                                -class => "list subject"},
4757                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4758                 my $comment = $co{'comment'};
4759                 foreach my $line (@$comment) {
4760                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4761                                 my ($lead, $match, $trail) = ($1, $2, $3);
4762                                 $match = chop_str($match, 70, 5, 'center');
4763                                 my $contextlen = int((80 - length($match))/2);
4764                                 $contextlen = 30 if ($contextlen > 30);
4765                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4766                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4767
4768                                 $lead  = esc_html($lead);
4769                                 $match = esc_html($match);
4770                                 $trail = esc_html($trail);
4771
4772                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4773                         }
4774                 }
4775                 print "</td>\n" .
4776                       "<td class=\"link\">" .
4777                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4778                       " | " .
4779                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4780                       " | " .
4781                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4782                 print "</td>\n" .
4783                       "</tr>\n";
4784         }
4785         if (defined $extra) {
4786                 print "<tr>\n" .
4787                       "<td colspan=\"3\">$extra</td>\n" .
4788                       "</tr>\n";
4789         }
4790         print "</table>\n";
4791 }
4792
4793 ## ======================================================================
4794 ## ======================================================================
4795 ## actions
4796
4797 sub git_project_list {
4798         my $order = $input_params{'order'};
4799         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4800                 die_error(400, "Unknown order parameter");
4801         }
4802
4803         my @list = git_get_projects_list();
4804         if (!@list) {
4805                 die_error(404, "No projects found");
4806         }
4807
4808         git_header_html();
4809         if (defined $home_text && -f $home_text) {
4810                 print "<div class=\"index_include\">\n";
4811                 insert_file($home_text);
4812                 print "</div>\n";
4813         }
4814         print $cgi->startform(-method => "get") .
4815               "<p class=\"projsearch\">Search:\n" .
4816               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4817               "</p>" .
4818               $cgi->end_form() . "\n";
4819         git_project_list_body(\@list, $order);
4820         git_footer_html();
4821 }
4822
4823 sub git_forks {
4824         my $order = $input_params{'order'};
4825         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4826                 die_error(400, "Unknown order parameter");
4827         }
4828
4829         my @list = git_get_projects_list($project);
4830         if (!@list) {
4831                 die_error(404, "No forks found");
4832         }
4833
4834         git_header_html();
4835         git_print_page_nav('','');
4836         git_print_header_div('summary', "$project forks");
4837         git_project_list_body(\@list, $order);
4838         git_footer_html();
4839 }
4840
4841 sub git_project_index {
4842         my @projects = git_get_projects_list($project);
4843
4844         print $cgi->header(
4845                 -type => 'text/plain',
4846                 -charset => 'utf-8',
4847                 -content_disposition => 'inline; filename="index.aux"');
4848
4849         foreach my $pr (@projects) {
4850                 if (!exists $pr->{'owner'}) {
4851                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4852                 }
4853
4854                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4855                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4856                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4857                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4858                 $path  =~ s/ /\+/g;
4859                 $owner =~ s/ /\+/g;
4860
4861                 print "$path $owner\n";
4862         }
4863 }
4864
4865 sub git_summary {
4866         my $descr = git_get_project_description($project) || "none";
4867         my %co = parse_commit("HEAD");
4868         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4869         my $head = $co{'id'};
4870
4871         my $owner = git_get_project_owner($project);
4872
4873         my $refs = git_get_references();
4874         # These get_*_list functions return one more to allow us to see if
4875         # there are more ...
4876         my @taglist  = git_get_tags_list(16);
4877         my @headlist = git_get_heads_list(16);
4878         my @forklist;
4879         my $check_forks = gitweb_check_feature('forks');
4880
4881         if ($check_forks) {
4882                 @forklist = git_get_projects_list($project);
4883         }
4884
4885         git_header_html();
4886         git_print_page_nav('summary','', $head);
4887
4888         print "<div class=\"title\">&nbsp;</div>\n";
4889         print "<table class=\"projects_list\">\n" .
4890               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4891               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4892         if (defined $cd{'rfc2822'}) {
4893                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4894         }
4895
4896         # use per project git URL list in $projectroot/$project/cloneurl
4897         # or make project git URL from git base URL and project name
4898         my $url_tag = "URL";
4899         my @url_list = git_get_project_url_list($project);
4900         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4901         foreach my $git_url (@url_list) {
4902                 next unless $git_url;
4903                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4904                 $url_tag = "";
4905         }
4906
4907         # Tag cloud
4908         my $show_ctags = gitweb_check_feature('ctags');
4909         if ($show_ctags) {
4910                 my $ctags = git_get_project_ctags($project);
4911                 my $cloud = git_populate_project_tagcloud($ctags);
4912                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4913                 print "</td>\n<td>" unless %$ctags;
4914                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4915                 print "</td>\n<td>" if %$ctags;
4916                 print git_show_project_tagcloud($cloud, 48);
4917                 print "</td></tr>";
4918         }
4919
4920         print "</table>\n";
4921
4922         # If XSS prevention is on, we don't include README.html.
4923         # TODO: Allow a readme in some safe format.
4924         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4925                 print "<div class=\"title\">readme</div>\n" .
4926                       "<div class=\"readme\">\n";
4927                 insert_file("$projectroot/$project/README.html");
4928                 print "\n</div>\n"; # class="readme"
4929         }
4930
4931         # we need to request one more than 16 (0..15) to check if
4932         # those 16 are all
4933         my @commitlist = $head ? parse_commits($head, 17) : ();
4934         if (@commitlist) {
4935                 git_print_header_div('shortlog');
4936                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4937                                   $#commitlist <=  15 ? undef :
4938                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4939         }
4940
4941         if (@taglist) {
4942                 git_print_header_div('tags');
4943                 git_tags_body(\@taglist, 0, 15,
4944                               $#taglist <=  15 ? undef :
4945                               $cgi->a({-href => href(action=>"tags")}, "..."));
4946         }
4947
4948         if (@headlist) {
4949                 git_print_header_div('heads');
4950                 git_heads_body(\@headlist, $head, 0, 15,
4951                                $#headlist <= 15 ? undef :
4952                                $cgi->a({-href => href(action=>"heads")}, "..."));
4953         }
4954
4955         if (@forklist) {
4956                 git_print_header_div('forks');
4957                 git_project_list_body(\@forklist, 'age', 0, 15,
4958                                       $#forklist <= 15 ? undef :
4959                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4960                                       'no_header');
4961         }
4962
4963         git_footer_html();
4964 }
4965
4966 sub git_tag {
4967         my $head = git_get_head_hash($project);
4968         git_header_html();
4969         git_print_page_nav('','', $head,undef,$head);
4970         my %tag = parse_tag($hash);
4971
4972         if (! %tag) {
4973                 die_error(404, "Unknown tag object");
4974         }
4975
4976         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4977         print "<div class=\"title_text\">\n" .
4978               "<table class=\"object_header\">\n" .
4979               "<tr>\n" .
4980               "<td>object</td>\n" .
4981               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4982                                $tag{'object'}) . "</td>\n" .
4983               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4984                                               $tag{'type'}) . "</td>\n" .
4985               "</tr>\n";
4986         if (defined($tag{'author'})) {
4987                 git_print_authorship_rows(\%tag, 'author');
4988         }
4989         print "</table>\n\n" .
4990               "</div>\n";
4991         print "<div class=\"page_body\">";
4992         my $comment = $tag{'comment'};
4993         foreach my $line (@$comment) {
4994                 chomp $line;
4995                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4996         }
4997         print "</div>\n";
4998         git_footer_html();
4999 }
5000
5001 sub git_blame_common {
5002         my $format = shift || 'porcelain';
5003         if ($format eq 'porcelain' && $cgi->param('js')) {
5004                 $format = 'incremental';
5005                 $action = 'blame_incremental'; # for page title etc
5006         }
5007
5008         # permissions
5009         gitweb_check_feature('blame')
5010                 or die_error(403, "Blame view not allowed");
5011
5012         # error checking
5013         die_error(400, "No file name given") unless $file_name;
5014         $hash_base ||= git_get_head_hash($project);
5015         die_error(404, "Couldn't find base commit") unless $hash_base;
5016         my %co = parse_commit($hash_base)
5017                 or die_error(404, "Commit not found");
5018         my $ftype = "blob";
5019         if (!defined $hash) {
5020                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5021                         or die_error(404, "Error looking up file");
5022         } else {
5023                 $ftype = git_get_type($hash);
5024                 if ($ftype !~ "blob") {
5025                         die_error(400, "Object is not a blob");
5026                 }
5027         }
5028
5029         my $fd;
5030         if ($format eq 'incremental') {
5031                 # get file contents (as base)
5032                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5033                         or die_error(500, "Open git-cat-file failed");
5034         } elsif ($format eq 'data') {
5035                 # run git-blame --incremental
5036                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5037                         $hash_base, "--", $file_name
5038                         or die_error(500, "Open git-blame --incremental failed");
5039         } else {
5040                 # run git-blame --porcelain
5041                 open $fd, "-|", git_cmd(), "blame", '-p',
5042                         $hash_base, '--', $file_name
5043                         or die_error(500, "Open git-blame --porcelain failed");
5044         }
5045
5046         # incremental blame data returns early
5047         if ($format eq 'data') {
5048                 print $cgi->header(
5049                         -type=>"text/plain", -charset => "utf-8",
5050                         -status=> "200 OK");
5051                 local $| = 1; # output autoflush
5052                 print while <$fd>;
5053                 close $fd
5054                         or print "ERROR $!\n";
5055
5056                 print 'END';
5057                 if (defined $t0 && gitweb_check_feature('timed')) {
5058                         print ' '.
5059                               Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
5060                               ' '.$number_of_git_cmds;
5061                 }
5062                 print "\n";
5063
5064                 return;
5065         }
5066
5067         # page header
5068         git_header_html();
5069         my $formats_nav =
5070                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5071                         "blob") .
5072                 " | ";
5073         if ($format eq 'incremental') {
5074                 $formats_nav .=
5075                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5076                                 "blame") . " (non-incremental)";
5077         } else {
5078                 $formats_nav .=
5079                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5080                                 "blame") . " (incremental)";
5081         }
5082         $formats_nav .=
5083                 " | " .
5084                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5085                         "history") .
5086                 " | " .
5087                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5088                         "HEAD");
5089         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5090         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5091         git_print_page_path($file_name, $ftype, $hash_base);
5092
5093         # page body
5094         if ($format eq 'incremental') {
5095                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5096                       "This page requires JavaScript to run.\n Use ".
5097                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5098                               'this page').
5099                       " instead.\n".
5100                       "</b></center></div>\n</noscript>\n";
5101
5102                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5103         }
5104
5105         print qq!<div class="page_body">\n!;
5106         print qq!<div id="progress_info">... / ...</div>\n!
5107                 if ($format eq 'incremental');
5108         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5109               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5110               qq!<thead>\n!.
5111               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5112               qq!</thead>\n!.
5113               qq!<tbody>\n!;
5114
5115         my @rev_color = qw(light dark);
5116         my $num_colors = scalar(@rev_color);
5117         my $current_color = 0;
5118
5119         if ($format eq 'incremental') {
5120                 my $color_class = $rev_color[$current_color];
5121
5122                 #contents of a file
5123                 my $linenr = 0;
5124         LINE:
5125                 while (my $line = <$fd>) {
5126                         chomp $line;
5127                         $linenr++;
5128
5129                         print qq!<tr id="l$linenr" class="$color_class">!.
5130                               qq!<td class="sha1"><a href=""> </a></td>!.
5131                               qq!<td class="linenr">!.
5132                               qq!<a class="linenr" href="">$linenr</a></td>!;
5133                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5134                         print qq!</tr>\n!;
5135                 }
5136
5137         } else { # porcelain, i.e. ordinary blame
5138                 my %metainfo = (); # saves information about commits
5139
5140                 # blame data
5141         LINE:
5142                 while (my $line = <$fd>) {
5143                         chomp $line;
5144                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5145                         # no <lines in group> for subsequent lines in group of lines
5146                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5147                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5148                         if (!exists $metainfo{$full_rev}) {
5149                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5150                         }
5151                         my $meta = $metainfo{$full_rev};
5152                         my $data;
5153                         while ($data = <$fd>) {
5154                                 chomp $data;
5155                                 last if ($data =~ s/^\t//); # contents of line
5156                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5157                                         $meta->{$1} = $2 unless exists $meta->{$1};
5158                                 }
5159                                 if ($data =~ /^previous /) {
5160                                         $meta->{'nprevious'}++;
5161                                 }
5162                         }
5163                         my $short_rev = substr($full_rev, 0, 8);
5164                         my $author = $meta->{'author'};
5165                         my %date =
5166                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5167                         my $date = $date{'iso-tz'};
5168                         if ($group_size) {
5169                                 $current_color = ($current_color + 1) % $num_colors;
5170                         }
5171                         my $tr_class = $rev_color[$current_color];
5172                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5173                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5174                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5175                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5176                         if ($group_size) {
5177                                 print "<td class=\"sha1\"";
5178                                 print " title=\"". esc_html($author) . ", $date\"";
5179                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5180                                 print ">";
5181                                 print $cgi->a({-href => href(action=>"commit",
5182                                                              hash=>$full_rev,
5183                                                              file_name=>$file_name)},
5184                                               esc_html($short_rev));
5185                                 if ($group_size >= 2) {
5186                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5187                                         if (@author_initials) {
5188                                                 print "<br />" .
5189                                                       esc_html(join('', @author_initials));
5190                                                 #           or join('.', ...)
5191                                         }
5192                                 }
5193                                 print "</td>\n";
5194                         }
5195                         # 'previous' <sha1 of parent commit> <filename at commit>
5196                         if (exists $meta->{'previous'} &&
5197                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5198                                 $meta->{'parent'} = $1;
5199                                 $meta->{'file_parent'} = unquote($2);
5200                         }
5201                         my $linenr_commit =
5202                                 exists($meta->{'parent'}) ?
5203                                 $meta->{'parent'} : $full_rev;
5204                         my $linenr_filename =
5205                                 exists($meta->{'file_parent'}) ?
5206                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5207                         my $blamed = href(action => 'blame',
5208                                           file_name => $linenr_filename,
5209                                           hash_base => $linenr_commit);
5210                         print "<td class=\"linenr\">";
5211                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5212                                         -class => "linenr" },
5213                                       esc_html($lineno));
5214                         print "</td>";
5215                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5216                         print "</tr>\n";
5217                 } # end while
5218
5219         }
5220
5221         # footer
5222         print "</tbody>\n".
5223               "</table>\n"; # class="blame"
5224         print "</div>\n";   # class="blame_body"
5225         close $fd
5226                 or print "Reading blob failed\n";
5227
5228         git_footer_html();
5229 }
5230
5231 sub git_blame {
5232         git_blame_common();
5233 }
5234
5235 sub git_blame_incremental {
5236         git_blame_common('incremental');
5237 }
5238
5239 sub git_blame_data {
5240         git_blame_common('data');
5241 }
5242
5243 sub git_tags {
5244         my $head = git_get_head_hash($project);
5245         git_header_html();
5246         git_print_page_nav('','', $head,undef,$head);
5247         git_print_header_div('summary', $project);
5248
5249         my @tagslist = git_get_tags_list();
5250         if (@tagslist) {
5251                 git_tags_body(\@tagslist);
5252         }
5253         git_footer_html();
5254 }
5255
5256 sub git_heads {
5257         my $head = git_get_head_hash($project);
5258         git_header_html();
5259         git_print_page_nav('','', $head,undef,$head);
5260         git_print_header_div('summary', $project);
5261
5262         my @headslist = git_get_heads_list();
5263         if (@headslist) {
5264                 git_heads_body(\@headslist, $head);
5265         }
5266         git_footer_html();
5267 }
5268
5269 sub git_blob_plain {
5270         my $type = shift;
5271         my $expires;
5272
5273         if (!defined $hash) {
5274                 if (defined $file_name) {
5275                         my $base = $hash_base || git_get_head_hash($project);
5276                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5277                                 or die_error(404, "Cannot find file");
5278                 } else {
5279                         die_error(400, "No file name defined");
5280                 }
5281         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5282                 # blobs defined by non-textual hash id's can be cached
5283                 $expires = "+1d";
5284         }
5285
5286         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5287                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5288
5289         # content-type (can include charset)
5290         $type = blob_contenttype($fd, $file_name, $type);
5291
5292         # "save as" filename, even when no $file_name is given
5293         my $save_as = "$hash";
5294         if (defined $file_name) {
5295                 $save_as = $file_name;
5296         } elsif ($type =~ m/^text\//) {
5297                 $save_as .= '.txt';
5298         }
5299
5300         # With XSS prevention on, blobs of all types except a few known safe
5301         # ones are served with "Content-Disposition: attachment" to make sure
5302         # they don't run in our security domain.  For certain image types,
5303         # blob view writes an <img> tag referring to blob_plain view, and we
5304         # want to be sure not to break that by serving the image as an
5305         # attachment (though Firefox 3 doesn't seem to care).
5306         my $sandbox = $prevent_xss &&
5307                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5308
5309         print $cgi->header(
5310                 -type => $type,
5311                 -expires => $expires,
5312                 -content_disposition =>
5313                         ($sandbox ? 'attachment' : 'inline')
5314                         . '; filename="' . $save_as . '"');
5315         local $/ = undef;
5316         binmode STDOUT, ':raw';
5317         print <$fd>;
5318         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5319         close $fd;
5320 }
5321
5322 sub git_blob {
5323         my $expires;
5324
5325         if (!defined $hash) {
5326                 if (defined $file_name) {
5327                         my $base = $hash_base || git_get_head_hash($project);
5328                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5329                                 or die_error(404, "Cannot find file");
5330                 } else {
5331                         die_error(400, "No file name defined");
5332                 }
5333         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5334                 # blobs defined by non-textual hash id's can be cached
5335                 $expires = "+1d";
5336         }
5337
5338         my $have_blame = gitweb_check_feature('blame');
5339         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5340                 or die_error(500, "Couldn't cat $file_name, $hash");
5341         my $mimetype = blob_mimetype($fd, $file_name);
5342         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5343                 close $fd;
5344                 return git_blob_plain($mimetype);
5345         }
5346         # we can have blame only for text/* mimetype
5347         $have_blame &&= ($mimetype =~ m!^text/!);
5348
5349         git_header_html(undef, $expires);
5350         my $formats_nav = '';
5351         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5352                 if (defined $file_name) {
5353                         if ($have_blame) {
5354                                 $formats_nav .=
5355                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5356                                                 "blame") .
5357                                         " | ";
5358                         }
5359                         $formats_nav .=
5360                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5361                                         "history") .
5362                                 " | " .
5363                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5364                                         "raw") .
5365                                 " | " .
5366                                 $cgi->a({-href => href(action=>"blob",
5367                                                        hash_base=>"HEAD", file_name=>$file_name)},
5368                                         "HEAD");
5369                 } else {
5370                         $formats_nav .=
5371                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5372                                         "raw");
5373                 }
5374                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5375                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5376         } else {
5377                 print "<div class=\"page_nav\">\n" .
5378                       "<br/><br/></div>\n" .
5379                       "<div class=\"title\">$hash</div>\n";
5380         }
5381         git_print_page_path($file_name, "blob", $hash_base);
5382         print "<div class=\"page_body\">\n";
5383         if ($mimetype =~ m!^image/!) {
5384                 print qq!<img type="$mimetype"!;
5385                 if ($file_name) {
5386                         print qq! alt="$file_name" title="$file_name"!;
5387                 }
5388                 print qq! src="! .
5389                       href(action=>"blob_plain", hash=>$hash,
5390                            hash_base=>$hash_base, file_name=>$file_name) .
5391                       qq!" />\n!;
5392         } else {
5393                 my $nr;
5394                 while (my $line = <$fd>) {
5395                         chomp $line;
5396                         $nr++;
5397                         $line = untabify($line);
5398                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"" . href(-replay => 1)
5399                                 . "#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
5400                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
5401                 }
5402         }
5403         close $fd
5404                 or print "Reading blob failed.\n";
5405         print "</div>";
5406         git_footer_html();
5407 }
5408
5409 sub git_tree {
5410         if (!defined $hash_base) {
5411                 $hash_base = "HEAD";
5412         }
5413         if (!defined $hash) {
5414                 if (defined $file_name) {
5415                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5416                 } else {
5417                         $hash = $hash_base;
5418                 }
5419         }
5420         die_error(404, "No such tree") unless defined($hash);
5421
5422         my $show_sizes = gitweb_check_feature('show-sizes');
5423         my $have_blame = gitweb_check_feature('blame');
5424
5425         my @entries = ();
5426         {
5427                 local $/ = "\0";
5428                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5429                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5430                         or die_error(500, "Open git-ls-tree failed");
5431                 @entries = map { chomp; $_ } <$fd>;
5432                 close $fd
5433                         or die_error(404, "Reading tree failed");
5434         }
5435
5436         my $refs = git_get_references();
5437         my $ref = format_ref_marker($refs, $hash_base);
5438         git_header_html();
5439         my $basedir = '';
5440         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5441                 my @views_nav = ();
5442                 if (defined $file_name) {
5443                         push @views_nav,
5444                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5445                                         "history"),
5446                                 $cgi->a({-href => href(action=>"tree",
5447                                                        hash_base=>"HEAD", file_name=>$file_name)},
5448                                         "HEAD"),
5449                 }
5450                 my $snapshot_links = format_snapshot_links($hash);
5451                 if (defined $snapshot_links) {
5452                         # FIXME: Should be available when we have no hash base as well.
5453                         push @views_nav, $snapshot_links;
5454                 }
5455                 git_print_page_nav('tree','', $hash_base, undef, undef,
5456                                    join(' | ', @views_nav));
5457                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5458         } else {
5459                 undef $hash_base;
5460                 print "<div class=\"page_nav\">\n";
5461                 print "<br/><br/></div>\n";
5462                 print "<div class=\"title\">$hash</div>\n";
5463         }
5464         if (defined $file_name) {
5465                 $basedir = $file_name;
5466                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5467                         $basedir .= '/';
5468                 }
5469                 git_print_page_path($file_name, 'tree', $hash_base);
5470         }
5471         print "<div class=\"page_body\">\n";
5472         print "<table class=\"tree\">\n";
5473         my $alternate = 1;
5474         # '..' (top directory) link if possible
5475         if (defined $hash_base &&
5476             defined $file_name && $file_name =~ m![^/]+$!) {
5477                 if ($alternate) {
5478                         print "<tr class=\"dark\">\n";
5479                 } else {
5480                         print "<tr class=\"light\">\n";
5481                 }
5482                 $alternate ^= 1;
5483
5484                 my $up = $file_name;
5485                 $up =~ s!/?[^/]+$!!;
5486                 undef $up unless $up;
5487                 # based on git_print_tree_entry
5488                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5489                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5490                 print '<td class="list">';
5491                 print $cgi->a({-href => href(action=>"tree",
5492                                              hash_base=>$hash_base,
5493                                              file_name=>$up)},
5494                               "..");
5495                 print "</td>\n";
5496                 print "<td class=\"link\"></td>\n";
5497
5498                 print "</tr>\n";
5499         }
5500         foreach my $line (@entries) {
5501                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5502
5503                 if ($alternate) {
5504                         print "<tr class=\"dark\">\n";
5505                 } else {
5506                         print "<tr class=\"light\">\n";
5507                 }
5508                 $alternate ^= 1;
5509
5510                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5511
5512                 print "</tr>\n";
5513         }
5514         print "</table>\n" .
5515               "</div>";
5516         git_footer_html();
5517 }
5518
5519 sub snapshot_name {
5520         my ($project, $hash) = @_;
5521
5522         # path/to/project.git  -> project
5523         # path/to/project/.git -> project
5524         my $name = to_utf8($project);
5525         $name =~ s,([^/])/*\.git$,$1,;
5526         $name = basename($name);
5527         # sanitize name
5528         $name =~ s/[[:cntrl:]]/?/g;
5529
5530         my $ver = $hash;
5531         if ($hash =~ /^[0-9a-fA-F]+$/) {
5532                 # shorten SHA-1 hash
5533                 my $full_hash = git_get_full_hash($project, $hash);
5534                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
5535                         $ver = git_get_short_hash($project, $hash);
5536                 }
5537         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
5538                 # tags don't need shortened SHA-1 hash
5539                 $ver = $1;
5540         } else {
5541                 # branches and other need shortened SHA-1 hash
5542                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
5543                         $ver = $1;
5544                 }
5545                 $ver .= '-' . git_get_short_hash($project, $hash);
5546         }
5547         # in case of hierarchical branch names
5548         $ver =~ s!/!.!g;
5549
5550         # name = project-version_string
5551         $name = "$name-$ver";
5552
5553         return wantarray ? ($name, $name) : $name;
5554 }
5555
5556 sub git_snapshot {
5557         my $format = $input_params{'snapshot_format'};
5558         if (!@snapshot_fmts) {
5559                 die_error(403, "Snapshots not allowed");
5560         }
5561         # default to first supported snapshot format
5562         $format ||= $snapshot_fmts[0];
5563         if ($format !~ m/^[a-z0-9]+$/) {
5564                 die_error(400, "Invalid snapshot format parameter");
5565         } elsif (!exists($known_snapshot_formats{$format})) {
5566                 die_error(400, "Unknown snapshot format");
5567         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5568                 die_error(403, "Snapshot format not allowed");
5569         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5570                 die_error(403, "Unsupported snapshot format");
5571         }
5572
5573         my $type = git_get_type("$hash^{}");
5574         if (!$type) {
5575                 die_error(404, 'Object does not exist');
5576         }  elsif ($type eq 'blob') {
5577                 die_error(400, 'Object is not a tree-ish');
5578         }
5579
5580         my ($name, $prefix) = snapshot_name($project, $hash);
5581         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
5582         my $cmd = quote_command(
5583                 git_cmd(), 'archive',
5584                 "--format=$known_snapshot_formats{$format}{'format'}",
5585                 "--prefix=$prefix/", $hash);
5586         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5587                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5588         }
5589
5590         $filename =~ s/(["\\])/\\$1/g;
5591         print $cgi->header(
5592                 -type => $known_snapshot_formats{$format}{'type'},
5593                 -content_disposition => 'inline; filename="' . $filename . '"',
5594                 -status => '200 OK');
5595
5596         open my $fd, "-|", $cmd
5597                 or die_error(500, "Execute git-archive failed");
5598         binmode STDOUT, ':raw';
5599         print <$fd>;
5600         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5601         close $fd;
5602 }
5603
5604 sub git_log_generic {
5605         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
5606
5607         my $head = git_get_head_hash($project);
5608         if (!defined $base) {
5609                 $base = $head;
5610         }
5611         if (!defined $page) {
5612                 $page = 0;
5613         }
5614         my $refs = git_get_references();
5615
5616         my $commit_hash = $base;
5617         if (defined $parent) {
5618                 $commit_hash = "$parent..$base";
5619         }
5620         my @commitlist =
5621                 parse_commits($commit_hash, 101, (100 * $page),
5622                               defined $file_name ? ($file_name, "--full-history") : ());
5623
5624         my $ftype;
5625         if (!defined $file_hash && defined $file_name) {
5626                 # some commits could have deleted file in question,
5627                 # and not have it in tree, but one of them has to have it
5628                 for (my $i = 0; $i < @commitlist; $i++) {
5629                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5630                         last if defined $file_hash;
5631                 }
5632         }
5633         if (defined $file_hash) {
5634                 $ftype = git_get_type($file_hash);
5635         }
5636         if (defined $file_name && !defined $ftype) {
5637                 die_error(500, "Unknown type of object");
5638         }
5639         my %co;
5640         if (defined $file_name) {
5641                 %co = parse_commit($base)
5642                         or die_error(404, "Unknown commit object");
5643         }
5644
5645
5646         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
5647         my $next_link = '';
5648         if ($#commitlist >= 100) {
5649                 $next_link =
5650                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5651                                  -accesskey => "n", -title => "Alt-n"}, "next");
5652         }
5653         my $patch_max = gitweb_get_feature('patches');
5654         if ($patch_max && !defined $file_name) {
5655                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5656                         $paging_nav .= " &sdot; " .
5657                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5658                                         "patches");
5659                 }
5660         }
5661
5662         git_header_html();
5663         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
5664         if (defined $file_name) {
5665                 git_print_header_div('commit', esc_html($co{'title'}), $base);
5666         } else {
5667                 git_print_header_div('summary', $project)
5668         }
5669         git_print_page_path($file_name, $ftype, $hash_base)
5670                 if (defined $file_name);
5671
5672         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
5673                      $file_name, $file_hash, $ftype);
5674
5675         git_footer_html();
5676 }
5677
5678 sub git_log {
5679         git_log_generic('log', \&git_log_body,
5680                         $hash, $hash_parent);
5681 }
5682
5683 sub git_commit {
5684         $hash ||= $hash_base || "HEAD";
5685         my %co = parse_commit($hash)
5686             or die_error(404, "Unknown commit object");
5687
5688         my $parent  = $co{'parent'};
5689         my $parents = $co{'parents'}; # listref
5690
5691         # we need to prepare $formats_nav before any parameter munging
5692         my $formats_nav;
5693         if (!defined $parent) {
5694                 # --root commitdiff
5695                 $formats_nav .= '(initial)';
5696         } elsif (@$parents == 1) {
5697                 # single parent commit
5698                 $formats_nav .=
5699                         '(parent: ' .
5700                         $cgi->a({-href => href(action=>"commit",
5701                                                hash=>$parent)},
5702                                 esc_html(substr($parent, 0, 7))) .
5703                         ')';
5704         } else {
5705                 # merge commit
5706                 $formats_nav .=
5707                         '(merge: ' .
5708                         join(' ', map {
5709                                 $cgi->a({-href => href(action=>"commit",
5710                                                        hash=>$_)},
5711                                         esc_html(substr($_, 0, 7)));
5712                         } @$parents ) .
5713                         ')';
5714         }
5715         if (gitweb_check_feature('patches') && @$parents <= 1) {
5716                 $formats_nav .= " | " .
5717                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5718                                 "patch");
5719         }
5720
5721         if (!defined $parent) {
5722                 $parent = "--root";
5723         }
5724         my @difftree;
5725         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5726                 @diff_opts,
5727                 (@$parents <= 1 ? $parent : '-c'),
5728                 $hash, "--"
5729                 or die_error(500, "Open git-diff-tree failed");
5730         @difftree = map { chomp; $_ } <$fd>;
5731         close $fd or die_error(404, "Reading git-diff-tree failed");
5732
5733         # non-textual hash id's can be cached
5734         my $expires;
5735         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5736                 $expires = "+1d";
5737         }
5738         my $refs = git_get_references();
5739         my $ref = format_ref_marker($refs, $co{'id'});
5740
5741         git_header_html(undef, $expires);
5742         git_print_page_nav('commit', '',
5743                            $hash, $co{'tree'}, $hash,
5744                            $formats_nav);
5745
5746         if (defined $co{'parent'}) {
5747                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5748         } else {
5749                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5750         }
5751         print "<div class=\"title_text\">\n" .
5752               "<table class=\"object_header\">\n";
5753         git_print_authorship_rows(\%co);
5754         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5755         print "<tr>" .
5756               "<td>tree</td>" .
5757               "<td class=\"sha1\">" .
5758               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5759                        class => "list"}, $co{'tree'}) .
5760               "</td>" .
5761               "<td class=\"link\">" .
5762               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5763                       "tree");
5764         my $snapshot_links = format_snapshot_links($hash);
5765         if (defined $snapshot_links) {
5766                 print " | " . $snapshot_links;
5767         }
5768         print "</td>" .
5769               "</tr>\n";
5770
5771         foreach my $par (@$parents) {
5772                 print "<tr>" .
5773                       "<td>parent</td>" .
5774                       "<td class=\"sha1\">" .
5775                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5776                                class => "list"}, $par) .
5777                       "</td>" .
5778                       "<td class=\"link\">" .
5779                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5780                       " | " .
5781                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5782                       "</td>" .
5783                       "</tr>\n";
5784         }
5785         print "</table>".
5786               "</div>\n";
5787
5788         print "<div class=\"page_body\">\n";
5789         git_print_log($co{'comment'});
5790         print "</div>\n";
5791
5792         git_difftree_body(\@difftree, $hash, @$parents);
5793
5794         git_footer_html();
5795 }
5796
5797 sub git_object {
5798         # object is defined by:
5799         # - hash or hash_base alone
5800         # - hash_base and file_name
5801         my $type;
5802
5803         # - hash or hash_base alone
5804         if ($hash || ($hash_base && !defined $file_name)) {
5805                 my $object_id = $hash || $hash_base;
5806
5807                 open my $fd, "-|", quote_command(
5808                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5809                         or die_error(404, "Object does not exist");
5810                 $type = <$fd>;
5811                 chomp $type;
5812                 close $fd
5813                         or die_error(404, "Object does not exist");
5814
5815         # - hash_base and file_name
5816         } elsif ($hash_base && defined $file_name) {
5817                 $file_name =~ s,/+$,,;
5818
5819                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5820                         or die_error(404, "Base object does not exist");
5821
5822                 # here errors should not hapen
5823                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5824                         or die_error(500, "Open git-ls-tree failed");
5825                 my $line = <$fd>;
5826                 close $fd;
5827
5828                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5829                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5830                         die_error(404, "File or directory for given base does not exist");
5831                 }
5832                 $type = $2;
5833                 $hash = $3;
5834         } else {
5835                 die_error(400, "Not enough information to find object");
5836         }
5837
5838         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5839                                           hash=>$hash, hash_base=>$hash_base,
5840                                           file_name=>$file_name),
5841                              -status => '302 Found');
5842 }
5843
5844 sub git_blobdiff {
5845         my $format = shift || 'html';
5846
5847         my $fd;
5848         my @difftree;
5849         my %diffinfo;
5850         my $expires;
5851
5852         # preparing $fd and %diffinfo for git_patchset_body
5853         # new style URI
5854         if (defined $hash_base && defined $hash_parent_base) {
5855                 if (defined $file_name) {
5856                         # read raw output
5857                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5858                                 $hash_parent_base, $hash_base,
5859                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5860                                 or die_error(500, "Open git-diff-tree failed");
5861                         @difftree = map { chomp; $_ } <$fd>;
5862                         close $fd
5863                                 or die_error(404, "Reading git-diff-tree failed");
5864                         @difftree
5865                                 or die_error(404, "Blob diff not found");
5866
5867                 } elsif (defined $hash &&
5868                          $hash =~ /[0-9a-fA-F]{40}/) {
5869                         # try to find filename from $hash
5870
5871                         # read filtered raw output
5872                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5873                                 $hash_parent_base, $hash_base, "--"
5874                                 or die_error(500, "Open git-diff-tree failed");
5875                         @difftree =
5876                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5877                                 # $hash == to_id
5878                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5879                                 map { chomp; $_ } <$fd>;
5880                         close $fd
5881                                 or die_error(404, "Reading git-diff-tree failed");
5882                         @difftree
5883                                 or die_error(404, "Blob diff not found");
5884
5885                 } else {
5886                         die_error(400, "Missing one of the blob diff parameters");
5887                 }
5888
5889                 if (@difftree > 1) {
5890                         die_error(400, "Ambiguous blob diff specification");
5891                 }
5892
5893                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5894                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5895                 $file_name   ||= $diffinfo{'to_file'};
5896
5897                 $hash_parent ||= $diffinfo{'from_id'};
5898                 $hash        ||= $diffinfo{'to_id'};
5899
5900                 # non-textual hash id's can be cached
5901                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5902                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5903                         $expires = '+1d';
5904                 }
5905
5906                 # open patch output
5907                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5908                         '-p', ($format eq 'html' ? "--full-index" : ()),
5909                         $hash_parent_base, $hash_base,
5910                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5911                         or die_error(500, "Open git-diff-tree failed");
5912         }
5913
5914         # old/legacy style URI -- not generated anymore since 1.4.3.
5915         if (!%diffinfo) {
5916                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5917         }
5918
5919         # header
5920         if ($format eq 'html') {
5921                 my $formats_nav =
5922                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5923                                 "raw");
5924                 git_header_html(undef, $expires);
5925                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5926                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5927                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5928                 } else {
5929                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5930                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5931                 }
5932                 if (defined $file_name) {
5933                         git_print_page_path($file_name, "blob", $hash_base);
5934                 } else {
5935                         print "<div class=\"page_path\"></div>\n";
5936                 }
5937
5938         } elsif ($format eq 'plain') {
5939                 print $cgi->header(
5940                         -type => 'text/plain',
5941                         -charset => 'utf-8',
5942                         -expires => $expires,
5943                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5944
5945                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5946
5947         } else {
5948                 die_error(400, "Unknown blobdiff format");
5949         }
5950
5951         # patch
5952         if ($format eq 'html') {
5953                 print "<div class=\"page_body\">\n";
5954
5955                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5956                 close $fd;
5957
5958                 print "</div>\n"; # class="page_body"
5959                 git_footer_html();
5960
5961         } else {
5962                 while (my $line = <$fd>) {
5963                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5964                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5965
5966                         print $line;
5967
5968                         last if $line =~ m!^\+\+\+!;
5969                 }
5970                 local $/ = undef;
5971                 print <$fd>;
5972                 close $fd;
5973         }
5974 }
5975
5976 sub git_blobdiff_plain {
5977         git_blobdiff('plain');
5978 }
5979
5980 sub git_commitdiff {
5981         my %params = @_;
5982         my $format = $params{-format} || 'html';
5983
5984         my ($patch_max) = gitweb_get_feature('patches');
5985         if ($format eq 'patch') {
5986                 die_error(403, "Patch view not allowed") unless $patch_max;
5987         }
5988
5989         $hash ||= $hash_base || "HEAD";
5990         my %co = parse_commit($hash)
5991             or die_error(404, "Unknown commit object");
5992
5993         # choose format for commitdiff for merge
5994         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5995                 $hash_parent = '--cc';
5996         }
5997         # we need to prepare $formats_nav before almost any parameter munging
5998         my $formats_nav;
5999         if ($format eq 'html') {
6000                 $formats_nav =
6001                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6002                                 "raw");
6003                 if ($patch_max && @{$co{'parents'}} <= 1) {
6004                         $formats_nav .= " | " .
6005                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6006                                         "patch");
6007                 }
6008
6009                 if (defined $hash_parent &&
6010                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6011                         # commitdiff with two commits given
6012                         my $hash_parent_short = $hash_parent;
6013                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6014                                 $hash_parent_short = substr($hash_parent, 0, 7);
6015                         }
6016                         $formats_nav .=
6017                                 ' (from';
6018                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6019                                 if ($co{'parents'}[$i] eq $hash_parent) {
6020                                         $formats_nav .= ' parent ' . ($i+1);
6021                                         last;
6022                                 }
6023                         }
6024                         $formats_nav .= ': ' .
6025                                 $cgi->a({-href => href(action=>"commitdiff",
6026                                                        hash=>$hash_parent)},
6027                                         esc_html($hash_parent_short)) .
6028                                 ')';
6029                 } elsif (!$co{'parent'}) {
6030                         # --root commitdiff
6031                         $formats_nav .= ' (initial)';
6032                 } elsif (scalar @{$co{'parents'}} == 1) {
6033                         # single parent commit
6034                         $formats_nav .=
6035                                 ' (parent: ' .
6036                                 $cgi->a({-href => href(action=>"commitdiff",
6037                                                        hash=>$co{'parent'})},
6038                                         esc_html(substr($co{'parent'}, 0, 7))) .
6039                                 ')';
6040                 } else {
6041                         # merge commit
6042                         if ($hash_parent eq '--cc') {
6043                                 $formats_nav .= ' | ' .
6044                                         $cgi->a({-href => href(action=>"commitdiff",
6045                                                                hash=>$hash, hash_parent=>'-c')},
6046                                                 'combined');
6047                         } else { # $hash_parent eq '-c'
6048                                 $formats_nav .= ' | ' .
6049                                         $cgi->a({-href => href(action=>"commitdiff",
6050                                                                hash=>$hash, hash_parent=>'--cc')},
6051                                                 'compact');
6052                         }
6053                         $formats_nav .=
6054                                 ' (merge: ' .
6055                                 join(' ', map {
6056                                         $cgi->a({-href => href(action=>"commitdiff",
6057                                                                hash=>$_)},
6058                                                 esc_html(substr($_, 0, 7)));
6059                                 } @{$co{'parents'}} ) .
6060                                 ')';
6061                 }
6062         }
6063
6064         my $hash_parent_param = $hash_parent;
6065         if (!defined $hash_parent_param) {
6066                 # --cc for multiple parents, --root for parentless
6067                 $hash_parent_param =
6068                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6069         }
6070
6071         # read commitdiff
6072         my $fd;
6073         my @difftree;
6074         if ($format eq 'html') {
6075                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6076                         "--no-commit-id", "--patch-with-raw", "--full-index",
6077                         $hash_parent_param, $hash, "--"
6078                         or die_error(500, "Open git-diff-tree failed");
6079
6080                 while (my $line = <$fd>) {
6081                         chomp $line;
6082                         # empty line ends raw part of diff-tree output
6083                         last unless $line;
6084                         push @difftree, scalar parse_difftree_raw_line($line);
6085                 }
6086
6087         } elsif ($format eq 'plain') {
6088                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6089                         '-p', $hash_parent_param, $hash, "--"
6090                         or die_error(500, "Open git-diff-tree failed");
6091         } elsif ($format eq 'patch') {
6092                 # For commit ranges, we limit the output to the number of
6093                 # patches specified in the 'patches' feature.
6094                 # For single commits, we limit the output to a single patch,
6095                 # diverging from the git-format-patch default.
6096                 my @commit_spec = ();
6097                 if ($hash_parent) {
6098                         if ($patch_max > 0) {
6099                                 push @commit_spec, "-$patch_max";
6100                         }
6101                         push @commit_spec, '-n', "$hash_parent..$hash";
6102                 } else {
6103                         if ($params{-single}) {
6104                                 push @commit_spec, '-1';
6105                         } else {
6106                                 if ($patch_max > 0) {
6107                                         push @commit_spec, "-$patch_max";
6108                                 }
6109                                 push @commit_spec, "-n";
6110                         }
6111                         push @commit_spec, '--root', $hash;
6112                 }
6113                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
6114                         '--stdout', @commit_spec
6115                         or die_error(500, "Open git-format-patch failed");
6116         } else {
6117                 die_error(400, "Unknown commitdiff format");
6118         }
6119
6120         # non-textual hash id's can be cached
6121         my $expires;
6122         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6123                 $expires = "+1d";
6124         }
6125
6126         # write commit message
6127         if ($format eq 'html') {
6128                 my $refs = git_get_references();
6129                 my $ref = format_ref_marker($refs, $co{'id'});
6130
6131                 git_header_html(undef, $expires);
6132                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6133                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6134                 print "<div class=\"title_text\">\n" .
6135                       "<table class=\"object_header\">\n";
6136                 git_print_authorship_rows(\%co);
6137                 print "</table>".
6138                       "</div>\n";
6139                 print "<div class=\"page_body\">\n";
6140                 if (@{$co{'comment'}} > 1) {
6141                         print "<div class=\"log\">\n";
6142                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6143                         print "</div>\n"; # class="log"
6144                 }
6145
6146         } elsif ($format eq 'plain') {
6147                 my $refs = git_get_references("tags");
6148                 my $tagname = git_get_rev_name_tags($hash);
6149                 my $filename = basename($project) . "-$hash.patch";
6150
6151                 print $cgi->header(
6152                         -type => 'text/plain',
6153                         -charset => 'utf-8',
6154                         -expires => $expires,
6155                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6156                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6157                 print "From: " . to_utf8($co{'author'}) . "\n";
6158                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6159                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6160
6161                 print "X-Git-Tag: $tagname\n" if $tagname;
6162                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6163
6164                 foreach my $line (@{$co{'comment'}}) {
6165                         print to_utf8($line) . "\n";
6166                 }
6167                 print "---\n\n";
6168         } elsif ($format eq 'patch') {
6169                 my $filename = basename($project) . "-$hash.patch";
6170
6171                 print $cgi->header(
6172                         -type => 'text/plain',
6173                         -charset => 'utf-8',
6174                         -expires => $expires,
6175                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6176         }
6177
6178         # write patch
6179         if ($format eq 'html') {
6180                 my $use_parents = !defined $hash_parent ||
6181                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6182                 git_difftree_body(\@difftree, $hash,
6183                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6184                 print "<br/>\n";
6185
6186                 git_patchset_body($fd, \@difftree, $hash,
6187                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6188                 close $fd;
6189                 print "</div>\n"; # class="page_body"
6190                 git_footer_html();
6191
6192         } elsif ($format eq 'plain') {
6193                 local $/ = undef;
6194                 print <$fd>;
6195                 close $fd
6196                         or print "Reading git-diff-tree failed\n";
6197         } elsif ($format eq 'patch') {
6198                 local $/ = undef;
6199                 print <$fd>;
6200                 close $fd
6201                         or print "Reading git-format-patch failed\n";
6202         }
6203 }
6204
6205 sub git_commitdiff_plain {
6206         git_commitdiff(-format => 'plain');
6207 }
6208
6209 # format-patch-style patches
6210 sub git_patch {
6211         git_commitdiff(-format => 'patch', -single => 1);
6212 }
6213
6214 sub git_patches {
6215         git_commitdiff(-format => 'patch');
6216 }
6217
6218 sub git_history {
6219         git_log_generic('history', \&git_history_body,
6220                         $hash_base, $hash_parent_base,
6221                         $file_name, $hash);
6222 }
6223
6224 sub git_search {
6225         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6226         if (!defined $searchtext) {
6227                 die_error(400, "Text field is empty");
6228         }
6229         if (!defined $hash) {
6230                 $hash = git_get_head_hash($project);
6231         }
6232         my %co = parse_commit($hash);
6233         if (!%co) {
6234                 die_error(404, "Unknown commit object");
6235         }
6236         if (!defined $page) {
6237                 $page = 0;
6238         }
6239
6240         $searchtype ||= 'commit';
6241         if ($searchtype eq 'pickaxe') {
6242                 # pickaxe may take all resources of your box and run for several minutes
6243                 # with every query - so decide by yourself how public you make this feature
6244                 gitweb_check_feature('pickaxe')
6245                     or die_error(403, "Pickaxe is disabled");
6246         }
6247         if ($searchtype eq 'grep') {
6248                 gitweb_check_feature('grep')
6249                     or die_error(403, "Grep is disabled");
6250         }
6251
6252         git_header_html();
6253
6254         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6255                 my $greptype;
6256                 if ($searchtype eq 'commit') {
6257                         $greptype = "--grep=";
6258                 } elsif ($searchtype eq 'author') {
6259                         $greptype = "--author=";
6260                 } elsif ($searchtype eq 'committer') {
6261                         $greptype = "--committer=";
6262                 }
6263                 $greptype .= $searchtext;
6264                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6265                                                $greptype, '--regexp-ignore-case',
6266                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6267
6268                 my $paging_nav = '';
6269                 if ($page > 0) {
6270                         $paging_nav .=
6271                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6272                                                        searchtext=>$searchtext,
6273                                                        searchtype=>$searchtype)},
6274                                         "first");
6275                         $paging_nav .= " &sdot; " .
6276                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6277                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6278                 } else {
6279                         $paging_nav .= "first";
6280                         $paging_nav .= " &sdot; prev";
6281                 }
6282                 my $next_link = '';
6283                 if ($#commitlist >= 100) {
6284                         $next_link =
6285                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6286                                          -accesskey => "n", -title => "Alt-n"}, "next");
6287                         $paging_nav .= " &sdot; $next_link";
6288                 } else {
6289                         $paging_nav .= " &sdot; next";
6290                 }
6291
6292                 if ($#commitlist >= 100) {
6293                 }
6294
6295                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6296                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6297                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6298         }
6299
6300         if ($searchtype eq 'pickaxe') {
6301                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6302                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6303
6304                 print "<table class=\"pickaxe search\">\n";
6305                 my $alternate = 1;
6306                 local $/ = "\n";
6307                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6308                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6309                         ($search_use_regexp ? '--pickaxe-regex' : ());
6310                 undef %co;
6311                 my @files;
6312                 while (my $line = <$fd>) {
6313                         chomp $line;
6314                         next unless $line;
6315
6316                         my %set = parse_difftree_raw_line($line);
6317                         if (defined $set{'commit'}) {
6318                                 # finish previous commit
6319                                 if (%co) {
6320                                         print "</td>\n" .
6321                                               "<td class=\"link\">" .
6322                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6323                                               " | " .
6324                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6325                                         print "</td>\n" .
6326                                               "</tr>\n";
6327                                 }
6328
6329                                 if ($alternate) {
6330                                         print "<tr class=\"dark\">\n";
6331                                 } else {
6332                                         print "<tr class=\"light\">\n";
6333                                 }
6334                                 $alternate ^= 1;
6335                                 %co = parse_commit($set{'commit'});
6336                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6337                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6338                                       "<td><i>$author</i></td>\n" .
6339                                       "<td>" .
6340                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6341                                               -class => "list subject"},
6342                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6343                         } elsif (defined $set{'to_id'}) {
6344                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6345
6346                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6347                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6348                                               -class => "list"},
6349                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6350                                       "<br/>\n";
6351                         }
6352                 }
6353                 close $fd;
6354
6355                 # finish last commit (warning: repetition!)
6356                 if (%co) {
6357                         print "</td>\n" .
6358                               "<td class=\"link\">" .
6359                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6360                               " | " .
6361                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6362                         print "</td>\n" .
6363                               "</tr>\n";
6364                 }
6365
6366                 print "</table>\n";
6367         }
6368
6369         if ($searchtype eq 'grep') {
6370                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6371                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6372
6373                 print "<table class=\"grep_search\">\n";
6374                 my $alternate = 1;
6375                 my $matches = 0;
6376                 local $/ = "\n";
6377                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6378                         $search_use_regexp ? ('-E', '-i') : '-F',
6379                         $searchtext, $co{'tree'};
6380                 my $lastfile = '';
6381                 while (my $line = <$fd>) {
6382                         chomp $line;
6383                         my ($file, $lno, $ltext, $binary);
6384                         last if ($matches++ > 1000);
6385                         if ($line =~ /^Binary file (.+) matches$/) {
6386                                 $file = $1;
6387                                 $binary = 1;
6388                         } else {
6389                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6390                         }
6391                         if ($file ne $lastfile) {
6392                                 $lastfile and print "</td></tr>\n";
6393                                 if ($alternate++) {
6394                                         print "<tr class=\"dark\">\n";
6395                                 } else {
6396                                         print "<tr class=\"light\">\n";
6397                                 }
6398                                 print "<td class=\"list\">".
6399                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6400                                                                file_name=>"$file"),
6401                                                 -class => "list"}, esc_path($file));
6402                                 print "</td><td>\n";
6403                                 $lastfile = $file;
6404                         }
6405                         if ($binary) {
6406                                 print "<div class=\"binary\">Binary file</div>\n";
6407                         } else {
6408                                 $ltext = untabify($ltext);
6409                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6410                                         $ltext = esc_html($1, -nbsp=>1);
6411                                         $ltext .= '<span class="match">';
6412                                         $ltext .= esc_html($2, -nbsp=>1);
6413                                         $ltext .= '</span>';
6414                                         $ltext .= esc_html($3, -nbsp=>1);
6415                                 } else {
6416                                         $ltext = esc_html($ltext, -nbsp=>1);
6417                                 }
6418                                 print "<div class=\"pre\">" .
6419                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6420                                                                file_name=>"$file").'#l'.$lno,
6421                                                 -class => "linenr"}, sprintf('%4i', $lno))
6422                                         . ' ' .  $ltext . "</div>\n";
6423                         }
6424                 }
6425                 if ($lastfile) {
6426                         print "</td></tr>\n";
6427                         if ($matches > 1000) {
6428                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6429                         }
6430                 } else {
6431                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6432                 }
6433                 close $fd;
6434
6435                 print "</table>\n";
6436         }
6437         git_footer_html();
6438 }
6439
6440 sub git_search_help {
6441         git_header_html();
6442         git_print_page_nav('','', $hash,$hash,$hash);
6443         print <<EOT;
6444 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6445 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6446 the pattern entered is recognized as the POSIX extended
6447 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6448 insensitive).</p>
6449 <dl>
6450 <dt><b>commit</b></dt>
6451 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6452 EOT
6453         my $have_grep = gitweb_check_feature('grep');
6454         if ($have_grep) {
6455                 print <<EOT;
6456 <dt><b>grep</b></dt>
6457 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6458     a different one) are searched for the given pattern. On large trees, this search can take
6459 a while and put some strain on the server, so please use it with some consideration. Note that
6460 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6461 case-sensitive.</dd>
6462 EOT
6463         }
6464         print <<EOT;
6465 <dt><b>author</b></dt>
6466 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6467 <dt><b>committer</b></dt>
6468 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6469 EOT
6470         my $have_pickaxe = gitweb_check_feature('pickaxe');
6471         if ($have_pickaxe) {
6472                 print <<EOT;
6473 <dt><b>pickaxe</b></dt>
6474 <dd>All commits that caused the string to appear or disappear from any file (changes that
6475 added, removed or "modified" the string) will be listed. This search can take a while and
6476 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6477 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6478 EOT
6479         }
6480         print "</dl>\n";
6481         git_footer_html();
6482 }
6483
6484 sub git_shortlog {
6485         git_log_generic('shortlog', \&git_shortlog_body,
6486                         $hash, $hash_parent);
6487 }
6488
6489 ## ......................................................................
6490 ## feeds (RSS, Atom; OPML)
6491
6492 sub git_feed {
6493         my $format = shift || 'atom';
6494         my $have_blame = gitweb_check_feature('blame');
6495
6496         # Atom: http://www.atomenabled.org/developers/syndication/
6497         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6498         if ($format ne 'rss' && $format ne 'atom') {
6499                 die_error(400, "Unknown web feed format");
6500         }
6501
6502         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6503         my $head = $hash || 'HEAD';
6504         my @commitlist = parse_commits($head, 150, 0, $file_name);
6505
6506         my %latest_commit;
6507         my %latest_date;
6508         my $content_type = "application/$format+xml";
6509         if (defined $cgi->http('HTTP_ACCEPT') &&
6510                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6511                 # browser (feed reader) prefers text/xml
6512                 $content_type = 'text/xml';
6513         }
6514         if (defined($commitlist[0])) {
6515                 %latest_commit = %{$commitlist[0]};
6516                 my $latest_epoch = $latest_commit{'committer_epoch'};
6517                 %latest_date   = parse_date($latest_epoch);
6518                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6519                 if (defined $if_modified) {
6520                         my $since;
6521                         if (eval { require HTTP::Date; 1; }) {
6522                                 $since = HTTP::Date::str2time($if_modified);
6523                         } elsif (eval { require Time::ParseDate; 1; }) {
6524                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6525                         }
6526                         if (defined $since && $latest_epoch <= $since) {
6527                                 print $cgi->header(
6528                                         -type => $content_type,
6529                                         -charset => 'utf-8',
6530                                         -last_modified => $latest_date{'rfc2822'},
6531                                         -status => '304 Not Modified');
6532                                 return;
6533                         }
6534                 }
6535                 print $cgi->header(
6536                         -type => $content_type,
6537                         -charset => 'utf-8',
6538                         -last_modified => $latest_date{'rfc2822'});
6539         } else {
6540                 print $cgi->header(
6541                         -type => $content_type,
6542                         -charset => 'utf-8');
6543         }
6544
6545         # Optimization: skip generating the body if client asks only
6546         # for Last-Modified date.
6547         return if ($cgi->request_method() eq 'HEAD');
6548
6549         # header variables
6550         my $title = "$site_name - $project/$action";
6551         my $feed_type = 'log';
6552         if (defined $hash) {
6553                 $title .= " - '$hash'";
6554                 $feed_type = 'branch log';
6555                 if (defined $file_name) {
6556                         $title .= " :: $file_name";
6557                         $feed_type = 'history';
6558                 }
6559         } elsif (defined $file_name) {
6560                 $title .= " - $file_name";
6561                 $feed_type = 'history';
6562         }
6563         $title .= " $feed_type";
6564         my $descr = git_get_project_description($project);
6565         if (defined $descr) {
6566                 $descr = esc_html($descr);
6567         } else {
6568                 $descr = "$project " .
6569                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6570                          " feed";
6571         }
6572         my $owner = git_get_project_owner($project);
6573         $owner = esc_html($owner);
6574
6575         #header
6576         my $alt_url;
6577         if (defined $file_name) {
6578                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6579         } elsif (defined $hash) {
6580                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6581         } else {
6582                 $alt_url = href(-full=>1, action=>"summary");
6583         }
6584         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6585         if ($format eq 'rss') {
6586                 print <<XML;
6587 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6588 <channel>
6589 XML
6590                 print "<title>$title</title>\n" .
6591                       "<link>$alt_url</link>\n" .
6592                       "<description>$descr</description>\n" .
6593                       "<language>en</language>\n" .
6594                       # project owner is responsible for 'editorial' content
6595                       "<managingEditor>$owner</managingEditor>\n";
6596                 if (defined $logo || defined $favicon) {
6597                         # prefer the logo to the favicon, since RSS
6598                         # doesn't allow both
6599                         my $img = esc_url($logo || $favicon);
6600                         print "<image>\n" .
6601                               "<url>$img</url>\n" .
6602                               "<title>$title</title>\n" .
6603                               "<link>$alt_url</link>\n" .
6604                               "</image>\n";
6605                 }
6606                 if (%latest_date) {
6607                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6608                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6609                 }
6610                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6611         } elsif ($format eq 'atom') {
6612                 print <<XML;
6613 <feed xmlns="http://www.w3.org/2005/Atom">
6614 XML
6615                 print "<title>$title</title>\n" .
6616                       "<subtitle>$descr</subtitle>\n" .
6617                       '<link rel="alternate" type="text/html" href="' .
6618                       $alt_url . '" />' . "\n" .
6619                       '<link rel="self" type="' . $content_type . '" href="' .
6620                       $cgi->self_url() . '" />' . "\n" .
6621                       "<id>" . href(-full=>1) . "</id>\n" .
6622                       # use project owner for feed author
6623                       "<author><name>$owner</name></author>\n";
6624                 if (defined $favicon) {
6625                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6626                 }
6627                 if (defined $logo_url) {
6628                         # not twice as wide as tall: 72 x 27 pixels
6629                         print "<logo>" . esc_url($logo) . "</logo>\n";
6630                 }
6631                 if (! %latest_date) {
6632                         # dummy date to keep the feed valid until commits trickle in:
6633                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6634                 } else {
6635                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6636                 }
6637                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6638         }
6639
6640         # contents
6641         for (my $i = 0; $i <= $#commitlist; $i++) {
6642                 my %co = %{$commitlist[$i]};
6643                 my $commit = $co{'id'};
6644                 # we read 150, we always show 30 and the ones more recent than 48 hours
6645                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6646                         last;
6647                 }
6648                 my %cd = parse_date($co{'author_epoch'});
6649
6650                 # get list of changed files
6651                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6652                         $co{'parent'} || "--root",
6653                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6654                         or next;
6655                 my @difftree = map { chomp; $_ } <$fd>;
6656                 close $fd
6657                         or next;
6658
6659                 # print element (entry, item)
6660                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6661                 if ($format eq 'rss') {
6662                         print "<item>\n" .
6663                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6664                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6665                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6666                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6667                               "<link>$co_url</link>\n" .
6668                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6669                               "<content:encoded>" .
6670                               "<![CDATA[\n";
6671                 } elsif ($format eq 'atom') {
6672                         print "<entry>\n" .
6673                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6674                               "<updated>$cd{'iso-8601'}</updated>\n" .
6675                               "<author>\n" .
6676                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6677                         if ($co{'author_email'}) {
6678                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6679                         }
6680                         print "</author>\n" .
6681                               # use committer for contributor
6682                               "<contributor>\n" .
6683                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6684                         if ($co{'committer_email'}) {
6685                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6686                         }
6687                         print "</contributor>\n" .
6688                               "<published>$cd{'iso-8601'}</published>\n" .
6689                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6690                               "<id>$co_url</id>\n" .
6691                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6692                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6693                 }
6694                 my $comment = $co{'comment'};
6695                 print "<pre>\n";
6696                 foreach my $line (@$comment) {
6697                         $line = esc_html($line);
6698                         print "$line\n";
6699                 }
6700                 print "</pre><ul>\n";
6701                 foreach my $difftree_line (@difftree) {
6702                         my %difftree = parse_difftree_raw_line($difftree_line);
6703                         next if !$difftree{'from_id'};
6704
6705                         my $file = $difftree{'file'} || $difftree{'to_file'};
6706
6707                         print "<li>" .
6708                               "[" .
6709                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6710                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6711                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6712                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6713                                       -title => "diff"}, 'D');
6714                         if ($have_blame) {
6715                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6716                                                              file_name=>$file, hash_base=>$commit),
6717                                               -title => "blame"}, 'B');
6718                         }
6719                         # if this is not a feed of a file history
6720                         if (!defined $file_name || $file_name ne $file) {
6721                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6722                                                              file_name=>$file, hash=>$commit),
6723                                               -title => "history"}, 'H');
6724                         }
6725                         $file = esc_path($file);
6726                         print "] ".
6727                               "$file</li>\n";
6728                 }
6729                 if ($format eq 'rss') {
6730                         print "</ul>]]>\n" .
6731                               "</content:encoded>\n" .
6732                               "</item>\n";
6733                 } elsif ($format eq 'atom') {
6734                         print "</ul>\n</div>\n" .
6735                               "</content>\n" .
6736                               "</entry>\n";
6737                 }
6738         }
6739
6740         # end of feed
6741         if ($format eq 'rss') {
6742                 print "</channel>\n</rss>\n";
6743         } elsif ($format eq 'atom') {
6744                 print "</feed>\n";
6745         }
6746 }
6747
6748 sub git_rss {
6749         git_feed('rss');
6750 }
6751
6752 sub git_atom {
6753         git_feed('atom');
6754 }
6755
6756 sub git_opml {
6757         my @list = git_get_projects_list();
6758
6759         print $cgi->header(
6760                 -type => 'text/xml',
6761                 -charset => 'utf-8',
6762                 -content_disposition => 'inline; filename="opml.xml"');
6763
6764         print <<XML;
6765 <?xml version="1.0" encoding="utf-8"?>
6766 <opml version="1.0">
6767 <head>
6768   <title>$site_name OPML Export</title>
6769 </head>
6770 <body>
6771 <outline text="git RSS feeds">
6772 XML
6773
6774         foreach my $pr (@list) {
6775                 my %proj = %$pr;
6776                 my $head = git_get_head_hash($proj{'path'});
6777                 if (!defined $head) {
6778                         next;
6779                 }
6780                 $git_dir = "$projectroot/$proj{'path'}";
6781                 my %co = parse_commit($head);
6782                 if (!%co) {
6783                         next;
6784                 }
6785
6786                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6787                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6788                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6789                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6790         }
6791         print <<XML;
6792 </outline>
6793 </body>
6794 </opml>
6795 XML
6796 }