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