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 set_message);
  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 # custom error handler: 'die <message>' is Internal Server Error
 956 sub handle_errors_html {
 957         my $msg = shift; # it is already HTML escaped
 958
 959         # to avoid infinite loop where error occurs in die_error,
 960         # change handler to default handler, disabling handle_errors_html
 961         set_message("Error occured when inside die_error:\n$msg");
 962
 963         # you cannot jump out of die_error when called as error handler;
 964         # the subroutine set via CGI::Carp::set_message is called _after_
 965         # HTTP headers are already written, so it cannot write them itself
 966         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
 967 }
 968 set_message(\&handle_errors_html);
 969
 970 # dispatch
 971 if (!defined $action) {
 972         if (defined $hash) {
 973                 $action = git_get_type($hash);
 974         } elsif (defined $hash_base && defined $file_name) {
 975                 $action = git_get_type("$hash_base:$file_name");
 976         } elsif (defined $project) {
 977                 $action = 'summary';
 978         } else {
 979                 $action = 'project_list';
 980         }
 981 }
 982 if (!defined($actions{$action})) {
 983         die_error(400, "Unknown action");
 984 }
 985 if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
 986     !$project) {
 987         die_error(400, "Project needed");
 988 }
 989 $actions{$action}->();
 990 DONE_GITWEB:
 991 1;
 992
 993 ## ======================================================================
 994 ## action links
 995
 996 # possible values of extra options
 997 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
 998 # -replay => 1      - start from a current view (replay with modifications)
 999 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1000 sub href {
1001         my %params = @_;
1002         # default is to use -absolute url() i.e. $my_uri
1003         my $href = $params{-full} ? $my_url : $my_uri;
1004
1005         $params{'project'} = $project unless exists $params{'project'};
1006
1007         if ($params{-replay}) {
1008                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1009                         if (!exists $params{$name}) {
1010                                 $params{$name} = $input_params{$name};
1011                         }
1012                 }
1013         }
1014
1015         my $use_pathinfo = gitweb_check_feature('pathinfo');
1016         if (defined $params{'project'} &&
1017             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1018                 # try to put as many parameters as possible in PATH_INFO:
1019                 #   - project name
1020                 #   - action
1021                 #   - hash_parent or hash_parent_base:/file_parent
1022                 #   - hash or hash_base:/filename
1023                 #   - the snapshot_format as an appropriate suffix
1024
1025                 # When the script is the root DirectoryIndex for the domain,
1026                 # $href here would be something like http://gitweb.example.com/
1027                 # Thus, we strip any trailing / from $href, to spare us double
1028                 # slashes in the final URL
1029                 $href =~ s,/$,,;
1030
1031                 # Then add the project name, if present
1032                 $href .= "/".esc_url($params{'project'});
1033                 delete $params{'project'};
1034
1035                 # since we destructively absorb parameters, we keep this
1036                 # boolean that remembers if we're handling a snapshot
1037                 my $is_snapshot = $params{'action'} eq 'snapshot';
1038
1039                 # Summary just uses the project path URL, any other action is
1040                 # added to the URL
1041                 if (defined $params{'action'}) {
1042                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
1043                         delete $params{'action'};
1044                 }
1045
1046                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1047                 # stripping nonexistent or useless pieces
1048                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1049                         || $params{'hash_parent'} || $params{'hash'});
1050                 if (defined $params{'hash_base'}) {
1051                         if (defined $params{'hash_parent_base'}) {
1052                                 $href .= esc_url($params{'hash_parent_base'});
1053                                 # skip the file_parent if it's the same as the file_name
1054                                 if (defined $params{'file_parent'}) {
1055                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1056                                                 delete $params{'file_parent'};
1057                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1058                                                 $href .= ":/".esc_url($params{'file_parent'});
1059                                                 delete $params{'file_parent'};
1060                                         }
1061                                 }
1062                                 $href .= "..";
1063                                 delete $params{'hash_parent'};
1064                                 delete $params{'hash_parent_base'};
1065                         } elsif (defined $params{'hash_parent'}) {
1066                                 $href .= esc_url($params{'hash_parent'}). "..";
1067                                 delete $params{'hash_parent'};
1068                         }
1069
1070                         $href .= esc_url($params{'hash_base'});
1071                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1072                                 $href .= ":/".esc_url($params{'file_name'});
1073                                 delete $params{'file_name'};
1074                         }
1075                         delete $params{'hash'};
1076                         delete $params{'hash_base'};
1077                 } elsif (defined $params{'hash'}) {
1078                         $href .= esc_url($params{'hash'});
1079                         delete $params{'hash'};
1080                 }
1081
1082                 # If the action was a snapshot, we can absorb the
1083                 # snapshot_format parameter too
1084                 if ($is_snapshot) {
1085                         my $fmt = $params{'snapshot_format'};
1086                         # snapshot_format should always be defined when href()
1087                         # is called, but just in case some code forgets, we
1088                         # fall back to the default
1089                         $fmt ||= $snapshot_fmts[0];
1090                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1091                         delete $params{'snapshot_format'};
1092                 }
1093         }
1094
1095         # now encode the parameters explicitly
1096         my @result = ();
1097         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1098                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1099                 if (defined $params{$name}) {
1100                         if (ref($params{$name}) eq "ARRAY") {
1101                                 foreach my $par (@{$params{$name}}) {
1102                                         push @result, $symbol . "=" . esc_param($par);
1103                                 }
1104                         } else {
1105                                 push @result, $symbol . "=" . esc_param($params{$name});
1106                         }
1107                 }
1108         }
1109         $href .= "?" . join(';', @result) if scalar @result;
1110
1111         return $href;
1112 }
1113
1114
1115 ## ======================================================================
1116 ## validation, quoting/unquoting and escaping
1117
1118 sub validate_action {
1119         my $input = shift || return undef;
1120         return undef unless exists $actions{$input};
1121         return $input;
1122 }
1123
1124 sub validate_project {
1125         my $input = shift || return undef;
1126         if (!validate_pathname($input) ||
1127                 !(-d "$projectroot/$input") ||
1128                 !check_export_ok("$projectroot/$input") ||
1129                 ($strict_export && !project_in_list($input))) {
1130                 return undef;
1131         } else {
1132                 return $input;
1133         }
1134 }
1135
1136 sub validate_pathname {
1137         my $input = shift || return undef;
1138
1139         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1140         # at the beginning, at the end, and between slashes.
1141         # also this catches doubled slashes
1142         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1143                 return undef;
1144         }
1145         # no null characters
1146         if ($input =~ m!\0!) {
1147                 return undef;
1148         }
1149         return $input;
1150 }
1151
1152 sub validate_refname {
1153         my $input = shift || return undef;
1154
1155         # textual hashes are O.K.
1156         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1157                 return $input;
1158         }
1159         # it must be correct pathname
1160         $input = validate_pathname($input)
1161                 or return undef;
1162         # restrictions on ref name according to git-check-ref-format
1163         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1164                 return undef;
1165         }
1166         return $input;
1167 }
1168
1169 # decode sequences of octets in utf8 into Perl's internal form,
1170 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1171 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1172 sub to_utf8 {
1173         my $str = shift;
1174         return undef unless defined $str;
1175         if (utf8::valid($str)) {
1176                 utf8::decode($str);
1177                 return $str;
1178         } else {
1179                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1180         }
1181 }
1182
1183 # quote unsafe chars, but keep the slash, even when it's not
1184 # correct, but quoted slashes look too horrible in bookmarks
1185 sub esc_param {
1186         my $str = shift;
1187         return undef unless defined $str;
1188         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1189         $str =~ s/ /\+/g;
1190         return $str;
1191 }
1192
1193 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1194 sub esc_url {
1195         my $str = shift;
1196         return undef unless defined $str;
1197         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1198         $str =~ s/\+/%2B/g;
1199         $str =~ s/ /\+/g;
1200         return $str;
1201 }
1202
1203 # replace invalid utf8 character with SUBSTITUTION sequence
1204 sub esc_html {
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:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1216         return $str;
1217 }
1218
1219 # quote control characters and escape filename to HTML
1220 sub esc_path {
1221         my $str = shift;
1222         my %opts = @_;
1223
1224         return undef unless defined $str;
1225
1226         $str = to_utf8($str);
1227         $str = $cgi->escapeHTML($str);
1228         if ($opts{'-nbsp'}) {
1229                 $str =~ s/ /&nbsp;/g;
1230         }
1231         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1232         return $str;
1233 }
1234
1235 # Make control characters "printable", using character escape codes (CEC)
1236 sub quot_cec {
1237         my $cntrl = shift;
1238         my %opts = @_;
1239         my %es = ( # character escape codes, aka escape sequences
1240                 "\t" => '\t',   # tab            (HT)
1241                 "\n" => '\n',   # line feed      (LF)
1242                 "\r" => '\r',   # carrige return (CR)
1243                 "\f" => '\f',   # form feed      (FF)
1244                 "\b" => '\b',   # backspace      (BS)
1245                 "\a" => '\a',   # alarm (bell)   (BEL)
1246                 "\e" => '\e',   # escape         (ESC)
1247                 "\013" => '\v', # vertical tab   (VT)
1248                 "\000" => '\0', # nul character  (NUL)
1249         );
1250         my $chr = ( (exists $es{$cntrl})
1251                     ? $es{$cntrl}
1252                     : sprintf('\%2x', ord($cntrl)) );
1253         if ($opts{-nohtml}) {
1254                 return $chr;
1255         } else {
1256                 return "<span class=\"cntrl\">$chr</span>";
1257         }
1258 }
1259
1260 # Alternatively use unicode control pictures codepoints,
1261 # Unicode "printable representation" (PR)
1262 sub quot_upr {
1263         my $cntrl = shift;
1264         my %opts = @_;
1265
1266         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1267         if ($opts{-nohtml}) {
1268                 return $chr;
1269         } else {
1270                 return "<span class=\"cntrl\">$chr</span>";
1271         }
1272 }
1273
1274 # git may return quoted and escaped filenames
1275 sub unquote {
1276         my $str = shift;
1277
1278         sub unq {
1279                 my $seq = shift;
1280                 my %es = ( # character escape codes, aka escape sequences
1281                         't' => "\t",   # tab            (HT, TAB)
1282                         'n' => "\n",   # newline        (NL)
1283                         'r' => "\r",   # return         (CR)
1284                         'f' => "\f",   # form feed      (FF)
1285                         'b' => "\b",   # backspace      (BS)
1286                         'a' => "\a",   # alarm (bell)   (BEL)
1287                         'e' => "\e",   # escape         (ESC)
1288                         'v' => "\013", # vertical tab   (VT)
1289                 );
1290
1291                 if ($seq =~ m/^[0-7]{1,3}$/) {
1292                         # octal char sequence
1293                         return chr(oct($seq));
1294                 } elsif (exists $es{$seq}) {
1295                         # C escape sequence, aka character escape code
1296                         return $es{$seq};
1297                 }
1298                 # quoted ordinary character
1299                 return $seq;
1300         }
1301
1302         if ($str =~ m/^"(.*)"$/) {
1303                 # needs unquoting
1304                 $str = $1;
1305                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1306         }
1307         return $str;
1308 }
1309
1310 # escape tabs (convert tabs to spaces)
1311 sub untabify {
1312         my $line = shift;
1313
1314         while ((my $pos = index($line, "\t")) != -1) {
1315                 if (my $count = (8 - ($pos % 8))) {
1316                         my $spaces = ' ' x $count;
1317                         $line =~ s/\t/$spaces/;
1318                 }
1319         }
1320
1321         return $line;
1322 }
1323
1324 sub project_in_list {
1325         my $project = shift;
1326         my @list = git_get_projects_list();
1327         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1328 }
1329
1330 ## ----------------------------------------------------------------------
1331 ## HTML aware string manipulation
1332
1333 # Try to chop given string on a word boundary between position
1334 # $len and $len+$add_len. If there is no word boundary there,
1335 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1336 # (marking chopped part) would be longer than given string.
1337 sub chop_str {
1338         my $str = shift;
1339         my $len = shift;
1340         my $add_len = shift || 10;
1341         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1342
1343         # Make sure perl knows it is utf8 encoded so we don't
1344         # cut in the middle of a utf8 multibyte char.
1345         $str = to_utf8($str);
1346
1347         # allow only $len chars, but don't cut a word if it would fit in $add_len
1348         # if it doesn't fit, cut it if it's still longer than the dots we would add
1349         # remove chopped character entities entirely
1350
1351         # when chopping in the middle, distribute $len into left and right part
1352         # return early if chopping wouldn't make string shorter
1353         if ($where eq 'center') {
1354                 return $str if ($len + 5 >= length($str)); # filler is length 5
1355                 $len = int($len/2);
1356         } else {
1357                 return $str if ($len + 4 >= length($str)); # filler is length 4
1358         }
1359
1360         # regexps: ending and beginning with word part up to $add_len
1361         my $endre = qr/.{$len}\w{0,$add_len}/;
1362         my $begre = qr/\w{0,$add_len}.{$len}/;
1363
1364         if ($where eq 'left') {
1365                 $str =~ m/^(.*?)($begre)$/;
1366                 my ($lead, $body) = ($1, $2);
1367                 if (length($lead) > 4) {
1368                         $lead = " ...";
1369                 }
1370                 return "$lead$body";
1371
1372         } elsif ($where eq 'center') {
1373                 $str =~ m/^($endre)(.*)$/;
1374                 my ($left, $str)  = ($1, $2);
1375                 $str =~ m/^(.*?)($begre)$/;
1376                 my ($mid, $right) = ($1, $2);
1377                 if (length($mid) > 5) {
1378                         $mid = " ... ";
1379                 }
1380                 return "$left$mid$right";
1381
1382         } else {
1383                 $str =~ m/^($endre)(.*)$/;
1384                 my $body = $1;
1385                 my $tail = $2;
1386                 if (length($tail) > 4) {
1387                         $tail = "... ";
1388                 }
1389                 return "$body$tail";
1390         }
1391 }
1392
1393 # takes the same arguments as chop_str, but also wraps a <span> around the
1394 # result with a title attribute if it does get chopped. Additionally, the
1395 # string is HTML-escaped.
1396 sub chop_and_escape_str {
1397         my ($str) = @_;
1398
1399         my $chopped = chop_str(@_);
1400         if ($chopped eq $str) {
1401                 return esc_html($chopped);
1402         } else {
1403                 $str =~ s/[[:cntrl:]]/?/g;
1404                 return $cgi->span({-title=>$str}, esc_html($chopped));
1405         }
1406 }
1407
1408 ## ----------------------------------------------------------------------
1409 ## functions returning short strings
1410
1411 # CSS class for given age value (in seconds)
1412 sub age_class {
1413         my $age = shift;
1414
1415         if (!defined $age) {
1416                 return "noage";
1417         } elsif ($age < 60*60*2) {
1418                 return "age0";
1419         } elsif ($age < 60*60*24*2) {
1420                 return "age1";
1421         } else {
1422                 return "age2";
1423         }
1424 }
1425
1426 # convert age in seconds to "nn units ago" string
1427 sub age_string {
1428         my $age = shift;
1429         my $age_str;
1430
1431         if ($age > 60*60*24*365*2) {
1432                 $age_str = (int $age/60/60/24/365);
1433                 $age_str .= " years ago";
1434         } elsif ($age > 60*60*24*(365/12)*2) {
1435                 $age_str = int $age/60/60/24/(365/12);
1436                 $age_str .= " months ago";
1437         } elsif ($age > 60*60*24*7*2) {
1438                 $age_str = int $age/60/60/24/7;
1439                 $age_str .= " weeks ago";
1440         } elsif ($age > 60*60*24*2) {
1441                 $age_str = int $age/60/60/24;
1442                 $age_str .= " days ago";
1443         } elsif ($age > 60*60*2) {
1444                 $age_str = int $age/60/60;
1445                 $age_str .= " hours ago";
1446         } elsif ($age > 60*2) {
1447                 $age_str = int $age/60;
1448                 $age_str .= " min ago";
1449         } elsif ($age > 2) {
1450                 $age_str = int $age;
1451                 $age_str .= " sec ago";
1452         } else {
1453                 $age_str .= " right now";
1454         }
1455         return $age_str;
1456 }
1457
1458 use constant {
1459         S_IFINVALID => 0030000,
1460         S_IFGITLINK => 0160000,
1461 };
1462
1463 # submodule/subproject, a commit object reference
1464 sub S_ISGITLINK {
1465         my $mode = shift;
1466
1467         return (($mode & S_IFMT) == S_IFGITLINK)
1468 }
1469
1470 # convert file mode in octal to symbolic file mode string
1471 sub mode_str {
1472         my $mode = oct shift;
1473
1474         if (S_ISGITLINK($mode)) {
1475                 return 'm---------';
1476         } elsif (S_ISDIR($mode & S_IFMT)) {
1477                 return 'drwxr-xr-x';
1478         } elsif (S_ISLNK($mode)) {
1479                 return 'lrwxrwxrwx';
1480         } elsif (S_ISREG($mode)) {
1481                 # git cares only about the executable bit
1482                 if ($mode & S_IXUSR) {
1483                         return '-rwxr-xr-x';
1484                 } else {
1485                         return '-rw-r--r--';
1486                 };
1487         } else {
1488                 return '----------';
1489         }
1490 }
1491
1492 # convert file mode in octal to file type string
1493 sub file_type {
1494         my $mode = shift;
1495
1496         if ($mode !~ m/^[0-7]+$/) {
1497                 return $mode;
1498         } else {
1499                 $mode = oct $mode;
1500         }
1501
1502         if (S_ISGITLINK($mode)) {
1503                 return "submodule";
1504         } elsif (S_ISDIR($mode & S_IFMT)) {
1505                 return "directory";
1506         } elsif (S_ISLNK($mode)) {
1507                 return "symlink";
1508         } elsif (S_ISREG($mode)) {
1509                 return "file";
1510         } else {
1511                 return "unknown";
1512         }
1513 }
1514
1515 # convert file mode in octal to file type description string
1516 sub file_type_long {
1517         my $mode = shift;
1518
1519         if ($mode !~ m/^[0-7]+$/) {
1520                 return $mode;
1521         } else {
1522                 $mode = oct $mode;
1523         }
1524
1525         if (S_ISGITLINK($mode)) {
1526                 return "submodule";
1527         } elsif (S_ISDIR($mode & S_IFMT)) {
1528                 return "directory";
1529         } elsif (S_ISLNK($mode)) {
1530                 return "symlink";
1531         } elsif (S_ISREG($mode)) {
1532                 if ($mode & S_IXUSR) {
1533                         return "executable";
1534                 } else {
1535                         return "file";
1536                 };
1537         } else {
1538                 return "unknown";
1539         }
1540 }
1541
1542
1543 ## ----------------------------------------------------------------------
1544 ## functions returning short HTML fragments, or transforming HTML fragments
1545 ## which don't belong to other sections
1546
1547 # format line of commit message.
1548 sub format_log_line_html {
1549         my $line = shift;
1550
1551         $line = esc_html($line, -nbsp=>1);
1552         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1553                 $cgi->a({-href => href(action=>"object", hash=>$1),
1554                                         -class => "text"}, $1);
1555         }eg;
1556
1557         return $line;
1558 }
1559
1560 # format marker of refs pointing to given object
1561
1562 # the destination action is chosen based on object type and current context:
1563 # - for annotated tags, we choose the tag view unless it's the current view
1564 #   already, in which case we go to shortlog view
1565 # - for other refs, we keep the current view if we're in history, shortlog or
1566 #   log view, and select shortlog otherwise
1567 sub format_ref_marker {
1568         my ($refs, $id) = @_;
1569         my $markers = '';
1570
1571         if (defined $refs->{$id}) {
1572                 foreach my $ref (@{$refs->{$id}}) {
1573                         # this code exploits the fact that non-lightweight tags are the
1574                         # only indirect objects, and that they are the only objects for which
1575                         # we want to use tag instead of shortlog as action
1576                         my ($type, $name) = qw();
1577                         my $indirect = ($ref =~ s/\^\{\}$//);
1578                         # e.g. tags/v2.6.11 or heads/next
1579                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1580                                 $type = $1;
1581                                 $name = $2;
1582                         } else {
1583                                 $type = "ref";
1584                                 $name = $ref;
1585                         }
1586
1587                         my $class = $type;
1588                         $class .= " indirect" if $indirect;
1589
1590                         my $dest_action = "shortlog";
1591
1592                         if ($indirect) {
1593                                 $dest_action = "tag" unless $action eq "tag";
1594                         } elsif ($action =~ /^(history|(short)?log)$/) {
1595                                 $dest_action = $action;
1596                         }
1597
1598                         my $dest = "";
1599                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1600                         $dest .= $ref;
1601
1602                         my $link = $cgi->a({
1603                                 -href => href(
1604                                         action=>$dest_action,
1605                                         hash=>$dest
1606                                 )}, $name);
1607
1608                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1609                                 $link . "</span>";
1610                 }
1611         }
1612
1613         if ($markers) {
1614                 return ' <span class="refs">'. $markers . '</span>';
1615         } else {
1616                 return "";
1617         }
1618 }
1619
1620 # format, perhaps shortened and with markers, title line
1621 sub format_subject_html {
1622         my ($long, $short, $href, $extra) = @_;
1623         $extra = '' unless defined($extra);
1624
1625         if (length($short) < length($long)) {
1626                 $long =~ s/[[:cntrl:]]/?/g;
1627                 return $cgi->a({-href => $href, -class => "list subject",
1628                                 -title => to_utf8($long)},
1629                        esc_html($short)) . $extra;
1630         } else {
1631                 return $cgi->a({-href => $href, -class => "list subject"},
1632                        esc_html($long)) . $extra;
1633         }
1634 }
1635
1636 # Rather than recomputing the url for an email multiple times, we cache it
1637 # after the first hit. This gives a visible benefit in views where the avatar
1638 # for the same email is used repeatedly (e.g. shortlog).
1639 # The cache is shared by all avatar engines (currently gravatar only), which
1640 # are free to use it as preferred. Since only one avatar engine is used for any
1641 # given page, there's no risk for cache conflicts.
1642 our %avatar_cache = ();
1643
1644 # Compute the picon url for a given email, by using the picon search service over at
1645 # http://www.cs.indiana.edu/picons/search.html
1646 sub picon_url {
1647         my $email = lc shift;
1648         if (!$avatar_cache{$email}) {
1649                 my ($user, $domain) = split('@', $email);
1650                 $avatar_cache{$email} =
1651                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1652                         "$domain/$user/" .
1653                         "users+domains+unknown/up/single";
1654         }
1655         return $avatar_cache{$email};
1656 }
1657
1658 # Compute the gravatar url for a given email, if it's not in the cache already.
1659 # Gravatar stores only the part of the URL before the size, since that's the
1660 # one computationally more expensive. This also allows reuse of the cache for
1661 # different sizes (for this particular engine).
1662 sub gravatar_url {
1663         my $email = lc shift;
1664         my $size = shift;
1665         $avatar_cache{$email} ||=
1666                 "http://www.gravatar.com/avatar/" .
1667                         Digest::MD5::md5_hex($email) . "?s=";
1668         return $avatar_cache{$email} . $size;
1669 }
1670
1671 # Insert an avatar for the given $email at the given $size if the feature
1672 # is enabled.
1673 sub git_get_avatar {
1674         my ($email, %opts) = @_;
1675         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1676         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1677         $opts{-size} ||= 'default';
1678         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1679         my $url = "";
1680         if ($git_avatar eq 'gravatar') {
1681                 $url = gravatar_url($email, $size);
1682         } elsif ($git_avatar eq 'picon') {
1683                 $url = picon_url($email);
1684         }
1685         # Other providers can be added by extending the if chain, defining $url
1686         # as needed. If no variant puts something in $url, we assume avatars
1687         # are completely disabled/unavailable.
1688         if ($url) {
1689                 return $pre_white .
1690                        "<img width=\"$size\" " .
1691                             "class=\"avatar\" " .
1692                             "src=\"$url\" " .
1693                             "alt=\"\" " .
1694                        "/>" . $post_white;
1695         } else {
1696                 return "";
1697         }
1698 }
1699
1700 sub format_search_author {
1701         my ($author, $searchtype, $displaytext) = @_;
1702         my $have_search = gitweb_check_feature('search');
1703
1704         if ($have_search) {
1705                 my $performed = "";
1706                 if ($searchtype eq 'author') {
1707                         $performed = "authored";
1708                 } elsif ($searchtype eq 'committer') {
1709                         $performed = "committed";
1710                 }
1711
1712                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1713                                 searchtext=>$author,
1714                                 searchtype=>$searchtype), class=>"list",
1715                                 title=>"Search for commits $performed by $author"},
1716                                 $displaytext);
1717
1718         } else {
1719                 return $displaytext;
1720         }
1721 }
1722
1723 # format the author name of the given commit with the given tag
1724 # the author name is chopped and escaped according to the other
1725 # optional parameters (see chop_str).
1726 sub format_author_html {
1727         my $tag = shift;
1728         my $co = shift;
1729         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1730         return "<$tag class=\"author\">" .
1731                format_search_author($co->{'author_name'}, "author",
1732                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1733                        $author) .
1734                "</$tag>";
1735 }
1736
1737 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1738 sub format_git_diff_header_line {
1739         my $line = shift;
1740         my $diffinfo = shift;
1741         my ($from, $to) = @_;
1742
1743         if ($diffinfo->{'nparents'}) {
1744                 # combined diff
1745                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1746                 if ($to->{'href'}) {
1747                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1748                                          esc_path($to->{'file'}));
1749                 } else { # file was deleted (no href)
1750                         $line .= esc_path($to->{'file'});
1751                 }
1752         } else {
1753                 # "ordinary" diff
1754                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1755                 if ($from->{'href'}) {
1756                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1757                                          'a/' . esc_path($from->{'file'}));
1758                 } else { # file was added (no href)
1759                         $line .= 'a/' . esc_path($from->{'file'});
1760                 }
1761                 $line .= ' ';
1762                 if ($to->{'href'}) {
1763                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1764                                          'b/' . esc_path($to->{'file'}));
1765                 } else { # file was deleted
1766                         $line .= 'b/' . esc_path($to->{'file'});
1767                 }
1768         }
1769
1770         return "<div class=\"diff header\">$line</div>\n";
1771 }
1772
1773 # format extended diff header line, before patch itself
1774 sub format_extended_diff_header_line {
1775         my $line = shift;
1776         my $diffinfo = shift;
1777         my ($from, $to) = @_;
1778
1779         # match <path>
1780         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1781                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1782                                        esc_path($from->{'file'}));
1783         }
1784         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1785                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1786                                  esc_path($to->{'file'}));
1787         }
1788         # match single <mode>
1789         if ($line =~ m/\s(\d{6})$/) {
1790                 $line .= '<span class="info"> (' .
1791                          file_type_long($1) .
1792                          ')</span>';
1793         }
1794         # match <hash>
1795         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1796                 # can match only for combined diff
1797                 $line = 'index ';
1798                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1799                         if ($from->{'href'}[$i]) {
1800                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1801                                                   -class=>"hash"},
1802                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1803                         } else {
1804                                 $line .= '0' x 7;
1805                         }
1806                         # separator
1807                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1808                 }
1809                 $line .= '..';
1810                 if ($to->{'href'}) {
1811                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1812                                          substr($diffinfo->{'to_id'},0,7));
1813                 } else {
1814                         $line .= '0' x 7;
1815                 }
1816
1817         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1818                 # can match only for ordinary diff
1819                 my ($from_link, $to_link);
1820                 if ($from->{'href'}) {
1821                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1822                                              substr($diffinfo->{'from_id'},0,7));
1823                 } else {
1824                         $from_link = '0' x 7;
1825                 }
1826                 if ($to->{'href'}) {
1827                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1828                                            substr($diffinfo->{'to_id'},0,7));
1829                 } else {
1830                         $to_link = '0' x 7;
1831                 }
1832                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1833                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1834         }
1835
1836         return $line . "<br/>\n";
1837 }
1838
1839 # format from-file/to-file diff header
1840 sub format_diff_from_to_header {
1841         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1842         my $line;
1843         my $result = '';
1844
1845         $line = $from_line;
1846         #assert($line =~ m/^---/) if DEBUG;
1847         # no extra formatting for "^--- /dev/null"
1848         if (! $diffinfo->{'nparents'}) {
1849                 # ordinary (single parent) diff
1850                 if ($line =~ m!^--- "?a/!) {
1851                         if ($from->{'href'}) {
1852                                 $line = '--- a/' .
1853                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1854                                                 esc_path($from->{'file'}));
1855                         } else {
1856                                 $line = '--- a/' .
1857                                         esc_path($from->{'file'});
1858                         }
1859                 }
1860                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1861
1862         } else {
1863                 # combined diff (merge commit)
1864                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1865                         if ($from->{'href'}[$i]) {
1866                                 $line = '--- ' .
1867                                         $cgi->a({-href=>href(action=>"blobdiff",
1868                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1869                                                              hash_parent_base=>$parents[$i],
1870                                                              file_parent=>$from->{'file'}[$i],
1871                                                              hash=>$diffinfo->{'to_id'},
1872                                                              hash_base=>$hash,
1873                                                              file_name=>$to->{'file'}),
1874                                                  -class=>"path",
1875                                                  -title=>"diff" . ($i+1)},
1876                                                 $i+1) .
1877                                         '/' .
1878                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1879                                                 esc_path($from->{'file'}[$i]));
1880                         } else {
1881                                 $line = '--- /dev/null';
1882                         }
1883                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1884                 }
1885         }
1886
1887         $line = $to_line;
1888         #assert($line =~ m/^\+\+\+/) if DEBUG;
1889         # no extra formatting for "^+++ /dev/null"
1890         if ($line =~ m!^\+\+\+ "?b/!) {
1891                 if ($to->{'href'}) {
1892                         $line = '+++ b/' .
1893                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1894                                         esc_path($to->{'file'}));
1895                 } else {
1896                         $line = '+++ b/' .
1897                                 esc_path($to->{'file'});
1898                 }
1899         }
1900         $result .= qq!<div class="diff to_file">$line</div>\n!;
1901
1902         return $result;
1903 }
1904
1905 # create note for patch simplified by combined diff
1906 sub format_diff_cc_simplified {
1907         my ($diffinfo, @parents) = @_;
1908         my $result = '';
1909
1910         $result .= "<div class=\"diff header\">" .
1911                    "diff --cc ";
1912         if (!is_deleted($diffinfo)) {
1913                 $result .= $cgi->a({-href => href(action=>"blob",
1914                                                   hash_base=>$hash,
1915                                                   hash=>$diffinfo->{'to_id'},
1916                                                   file_name=>$diffinfo->{'to_file'}),
1917                                     -class => "path"},
1918                                    esc_path($diffinfo->{'to_file'}));
1919         } else {
1920                 $result .= esc_path($diffinfo->{'to_file'});
1921         }
1922         $result .= "</div>\n" . # class="diff header"
1923                    "<div class=\"diff nodifferences\">" .
1924                    "Simple merge" .
1925                    "</div>\n"; # class="diff nodifferences"
1926
1927         return $result;
1928 }
1929
1930 # format patch (diff) line (not to be used for diff headers)
1931 sub format_diff_line {
1932         my $line = shift;
1933         my ($from, $to) = @_;
1934         my $diff_class = "";
1935
1936         chomp $line;
1937
1938         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1939                 # combined diff
1940                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1941                 if ($line =~ m/^\@{3}/) {
1942                         $diff_class = " chunk_header";
1943                 } elsif ($line =~ m/^\\/) {
1944                         $diff_class = " incomplete";
1945                 } elsif ($prefix =~ tr/+/+/) {
1946                         $diff_class = " add";
1947                 } elsif ($prefix =~ tr/-/-/) {
1948                         $diff_class = " rem";
1949                 }
1950         } else {
1951                 # assume ordinary diff
1952                 my $char = substr($line, 0, 1);
1953                 if ($char eq '+') {
1954                         $diff_class = " add";
1955                 } elsif ($char eq '-') {
1956                         $diff_class = " rem";
1957                 } elsif ($char eq '@') {
1958                         $diff_class = " chunk_header";
1959                 } elsif ($char eq "\\") {
1960                         $diff_class = " incomplete";
1961                 }
1962         }
1963         $line = untabify($line);
1964         if ($from && $to && $line =~ m/^\@{2} /) {
1965                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1966                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1967
1968                 $from_lines = 0 unless defined $from_lines;
1969                 $to_lines   = 0 unless defined $to_lines;
1970
1971                 if ($from->{'href'}) {
1972                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1973                                              -class=>"list"}, $from_text);
1974                 }
1975                 if ($to->{'href'}) {
1976                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1977                                              -class=>"list"}, $to_text);
1978                 }
1979                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1980                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1981                 return "<div class=\"diff$diff_class\">$line</div>\n";
1982         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1983                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1984                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1985
1986                 @from_text = split(' ', $ranges);
1987                 for (my $i = 0; $i < @from_text; ++$i) {
1988                         ($from_start[$i], $from_nlines[$i]) =
1989                                 (split(',', substr($from_text[$i], 1)), 0);
1990                 }
1991
1992                 $to_text   = pop @from_text;
1993                 $to_start  = pop @from_start;
1994                 $to_nlines = pop @from_nlines;
1995
1996                 $line = "<span class=\"chunk_info\">$prefix ";
1997                 for (my $i = 0; $i < @from_text; ++$i) {
1998                         if ($from->{'href'}[$i]) {
1999                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2000                                                   -class=>"list"}, $from_text[$i]);
2001                         } else {
2002                                 $line .= $from_text[$i];
2003                         }
2004                         $line .= " ";
2005                 }
2006                 if ($to->{'href'}) {
2007                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2008                                           -class=>"list"}, $to_text);
2009                 } else {
2010                         $line .= $to_text;
2011                 }
2012                 $line .= " $prefix</span>" .
2013                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2014                 return "<div class=\"diff$diff_class\">$line</div>\n";
2015         }
2016         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2017 }
2018
2019 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2020 # linked.  Pass the hash of the tree/commit to snapshot.
2021 sub format_snapshot_links {
2022         my ($hash) = @_;
2023         my $num_fmts = @snapshot_fmts;
2024         if ($num_fmts > 1) {
2025                 # A parenthesized list of links bearing format names.
2026                 # e.g. "snapshot (_tar.gz_ _zip_)"
2027                 return "snapshot (" . join(' ', map
2028                         $cgi->a({
2029                                 -href => href(
2030                                         action=>"snapshot",
2031                                         hash=>$hash,
2032                                         snapshot_format=>$_
2033                                 )
2034                         }, $known_snapshot_formats{$_}{'display'})
2035                 , @snapshot_fmts) . ")";
2036         } elsif ($num_fmts == 1) {
2037                 # A single "snapshot" link whose tooltip bears the format name.
2038                 # i.e. "_snapshot_"
2039                 my ($fmt) = @snapshot_fmts;
2040                 return
2041                         $cgi->a({
2042                                 -href => href(
2043                                         action=>"snapshot",
2044                                         hash=>$hash,
2045                                         snapshot_format=>$fmt
2046                                 ),
2047                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2048                         }, "snapshot");
2049         } else { # $num_fmts == 0
2050                 return undef;
2051         }
2052 }
2053
2054 ## ......................................................................
2055 ## functions returning values to be passed, perhaps after some
2056 ## transformation, to other functions; e.g. returning arguments to href()
2057
2058 # returns hash to be passed to href to generate gitweb URL
2059 # in -title key it returns description of link
2060 sub get_feed_info {
2061         my $format = shift || 'Atom';
2062         my %res = (action => lc($format));
2063
2064         # feed links are possible only for project views
2065         return unless (defined $project);
2066         # some views should link to OPML, or to generic project feed,
2067         # or don't have specific feed yet (so they should use generic)
2068         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2069
2070         my $branch;
2071         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2072         # from tag links; this also makes possible to detect branch links
2073         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2074             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2075                 $branch = $1;
2076         }
2077         # find log type for feed description (title)
2078         my $type = 'log';
2079         if (defined $file_name) {
2080                 $type  = "history of $file_name";
2081                 $type .= "/" if ($action eq 'tree');
2082                 $type .= " on '$branch'" if (defined $branch);
2083         } else {
2084                 $type = "log of $branch" if (defined $branch);
2085         }
2086
2087         $res{-title} = $type;
2088         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2089         $res{'file_name'} = $file_name;
2090
2091         return %res;
2092 }
2093
2094 ## ----------------------------------------------------------------------
2095 ## git utility subroutines, invoking git commands
2096
2097 # returns path to the core git executable and the --git-dir parameter as list
2098 sub git_cmd {
2099         $number_of_git_cmds++;
2100         return $GIT, '--git-dir='.$git_dir;
2101 }
2102
2103 # quote the given arguments for passing them to the shell
2104 # quote_command("command", "arg 1", "arg with ' and ! characters")
2105 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2106 # Try to avoid using this function wherever possible.
2107 sub quote_command {
2108         return join(' ',
2109                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2110 }
2111
2112 # get HEAD ref of given project as hash
2113 sub git_get_head_hash {
2114         return git_get_full_hash(shift, 'HEAD');
2115 }
2116
2117 sub git_get_full_hash {
2118         return git_get_hash(@_);
2119 }
2120
2121 sub git_get_short_hash {
2122         return git_get_hash(@_, '--short=7');
2123 }
2124
2125 sub git_get_hash {
2126         my ($project, $hash, @options) = @_;
2127         my $o_git_dir = $git_dir;
2128         my $retval = undef;
2129         $git_dir = "$projectroot/$project";
2130         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2131             '--verify', '-q', @options, $hash) {
2132                 $retval = <$fd>;
2133                 chomp $retval if defined $retval;
2134                 close $fd;
2135         }
2136         if (defined $o_git_dir) {
2137                 $git_dir = $o_git_dir;
2138         }
2139         return $retval;
2140 }
2141
2142 # get type of given object
2143 sub git_get_type {
2144         my $hash = shift;
2145
2146         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2147         my $type = <$fd>;
2148         close $fd or return;
2149         chomp $type;
2150         return $type;
2151 }
2152
2153 # repository configuration
2154 our $config_file = '';
2155 our %config;
2156
2157 # store multiple values for single key as anonymous array reference
2158 # single values stored directly in the hash, not as [ <value> ]
2159 sub hash_set_multi {
2160         my ($hash, $key, $value) = @_;
2161
2162         if (!exists $hash->{$key}) {
2163                 $hash->{$key} = $value;
2164         } elsif (!ref $hash->{$key}) {
2165                 $hash->{$key} = [ $hash->{$key}, $value ];
2166         } else {
2167                 push @{$hash->{$key}}, $value;
2168         }
2169 }
2170
2171 # return hash of git project configuration
2172 # optionally limited to some section, e.g. 'gitweb'
2173 sub git_parse_project_config {
2174         my $section_regexp = shift;
2175         my %config;
2176
2177         local $/ = "\0";
2178
2179         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2180                 or return;
2181
2182         while (my $keyval = <$fh>) {
2183                 chomp $keyval;
2184                 my ($key, $value) = split(/\n/, $keyval, 2);
2185
2186                 hash_set_multi(\%config, $key, $value)
2187                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2188         }
2189         close $fh;
2190
2191         return %config;
2192 }
2193
2194 # convert config value to boolean: 'true' or 'false'
2195 # no value, number > 0, 'true' and 'yes' values are true
2196 # rest of values are treated as false (never as error)
2197 sub config_to_bool {
2198         my $val = shift;
2199
2200         return 1 if !defined $val;             # section.key
2201
2202         # strip leading and trailing whitespace
2203         $val =~ s/^\s+//;
2204         $val =~ s/\s+$//;
2205
2206         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2207                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2208 }
2209
2210 # convert config value to simple decimal number
2211 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2212 # to be multiplied by 1024, 1048576, or 1073741824
2213 sub config_to_int {
2214         my $val = shift;
2215
2216         # strip leading and trailing whitespace
2217         $val =~ s/^\s+//;
2218         $val =~ s/\s+$//;
2219
2220         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2221                 $unit = lc($unit);
2222                 # unknown unit is treated as 1
2223                 return $num * ($unit eq 'g' ? 1073741824 :
2224                                $unit eq 'm' ?    1048576 :
2225                                $unit eq 'k' ?       1024 : 1);
2226         }
2227         return $val;
2228 }
2229
2230 # convert config value to array reference, if needed
2231 sub config_to_multi {
2232         my $val = shift;
2233
2234         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2235 }
2236
2237 sub git_get_project_config {
2238         my ($key, $type) = @_;
2239
2240         return unless defined $git_dir;
2241
2242         # key sanity check
2243         return unless ($key);
2244         $key =~ s/^gitweb\.//;
2245         return if ($key =~ m/\W/);
2246
2247         # type sanity check
2248         if (defined $type) {
2249                 $type =~ s/^--//;
2250                 $type = undef
2251                         unless ($type eq 'bool' || $type eq 'int');
2252         }
2253
2254         # get config
2255         if (!defined $config_file ||
2256             $config_file ne "$git_dir/config") {
2257                 %config = git_parse_project_config('gitweb');
2258                 $config_file = "$git_dir/config";
2259         }
2260
2261         # check if config variable (key) exists
2262         return unless exists $config{"gitweb.$key"};
2263
2264         # ensure given type
2265         if (!defined $type) {
2266                 return $config{"gitweb.$key"};
2267         } elsif ($type eq 'bool') {
2268                 # backward compatibility: 'git config --bool' returns true/false
2269                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2270         } elsif ($type eq 'int') {
2271                 return config_to_int($config{"gitweb.$key"});
2272         }
2273         return $config{"gitweb.$key"};
2274 }
2275
2276 # get hash of given path at given ref
2277 sub git_get_hash_by_path {
2278         my $base = shift;
2279         my $path = shift || return undef;
2280         my $type = shift;
2281
2282         $path =~ s,/+$,,;
2283
2284         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2285                 or die_error(500, "Open git-ls-tree failed");
2286         my $line = <$fd>;
2287         close $fd or return undef;
2288
2289         if (!defined $line) {
2290                 # there is no tree or hash given by $path at $base
2291                 return undef;
2292         }
2293
2294         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2295         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2296         if (defined $type && $type ne $2) {
2297                 # type doesn't match
2298                 return undef;
2299         }
2300         return $3;
2301 }
2302
2303 # get path of entry with given hash at given tree-ish (ref)
2304 # used to get 'from' filename for combined diff (merge commit) for renames
2305 sub git_get_path_by_hash {
2306         my $base = shift || return;
2307         my $hash = shift || return;
2308
2309         local $/ = "\0";
2310
2311         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2312                 or return undef;
2313         while (my $line = <$fd>) {
2314                 chomp $line;
2315
2316                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2317                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2318                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2319                         close $fd;
2320                         return $1;
2321                 }
2322         }
2323         close $fd;
2324         return undef;
2325 }
2326
2327 ## ......................................................................
2328 ## git utility functions, directly accessing git repository
2329
2330 sub git_get_project_description {
2331         my $path = shift;
2332
2333         $git_dir = "$projectroot/$path";
2334         open my $fd, '<', "$git_dir/description"
2335                 or return git_get_project_config('description');
2336         my $descr = <$fd>;
2337         close $fd;
2338         if (defined $descr) {
2339                 chomp $descr;
2340         }
2341         return $descr;
2342 }
2343
2344 sub git_get_project_ctags {
2345         my $path = shift;
2346         my $ctags = {};
2347
2348         $git_dir = "$projectroot/$path";
2349         opendir my $dh, "$git_dir/ctags"
2350                 or return $ctags;
2351         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2352                 open my $ct, '<', $_ or next;
2353                 my $val = <$ct>;
2354                 chomp $val;
2355                 close $ct;
2356                 my $ctag = $_; $ctag =~ s#.*/##;
2357                 $ctags->{$ctag} = $val;
2358         }
2359         closedir $dh;
2360         $ctags;
2361 }
2362
2363 sub git_populate_project_tagcloud {
2364         my $ctags = shift;
2365
2366         # First, merge different-cased tags; tags vote on casing
2367         my %ctags_lc;
2368         foreach (keys %$ctags) {
2369                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2370                 if (not $ctags_lc{lc $_}->{topcount}
2371                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2372                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2373                         $ctags_lc{lc $_}->{topname} = $_;
2374                 }
2375         }
2376
2377         my $cloud;
2378         if (eval { require HTML::TagCloud; 1; }) {
2379                 $cloud = HTML::TagCloud->new;
2380                 foreach (sort keys %ctags_lc) {
2381                         # Pad the title with spaces so that the cloud looks
2382                         # less crammed.
2383                         my $title = $ctags_lc{$_}->{topname};
2384                         $title =~ s/ /&nbsp;/g;
2385                         $title =~ s/^/&nbsp;/g;
2386                         $title =~ s/$/&nbsp;/g;
2387                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2388                 }
2389         } else {
2390                 $cloud = \%ctags_lc;
2391         }
2392         $cloud;
2393 }
2394
2395 sub git_show_project_tagcloud {
2396         my ($cloud, $count) = @_;
2397         print STDERR ref($cloud)."..\n";
2398         if (ref $cloud eq 'HTML::TagCloud') {
2399                 return $cloud->html_and_css($count);
2400         } else {
2401                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2402                 return '<p align="center">' . join (', ', map {
2403                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2404                 } splice(@tags, 0, $count)) . '</p>';
2405         }
2406 }
2407
2408 sub git_get_project_url_list {
2409         my $path = shift;
2410
2411         $git_dir = "$projectroot/$path";
2412         open my $fd, '<', "$git_dir/cloneurl"
2413                 or return wantarray ?
2414                 @{ config_to_multi(git_get_project_config('url')) } :
2415                    config_to_multi(git_get_project_config('url'));
2416         my @git_project_url_list = map { chomp; $_ } <$fd>;
2417         close $fd;
2418
2419         return wantarray ? @git_project_url_list : \@git_project_url_list;
2420 }
2421
2422 sub git_get_projects_list {
2423         my ($filter) = @_;
2424         my @list;
2425
2426         $filter ||= '';
2427         $filter =~ s/\.git$//;
2428
2429         my $check_forks = gitweb_check_feature('forks');
2430
2431         if (-d $projects_list) {
2432                 # search in directory
2433                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2434                 # remove the trailing "/"
2435                 $dir =~ s!/+$!!;
2436                 my $pfxlen = length("$dir");
2437                 my $pfxdepth = ($dir =~ tr!/!!);
2438
2439                 File::Find::find({
2440                         follow_fast => 1, # follow symbolic links
2441                         follow_skip => 2, # ignore duplicates
2442                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2443                         wanted => sub {
2444                                 # global variables
2445                                 our $project_maxdepth;
2446                                 our $projectroot;
2447                                 # skip project-list toplevel, if we get it.
2448                                 return if (m!^[/.]$!);
2449                                 # only directories can be git repositories
2450                                 return unless (-d $_);
2451                                 # don't traverse too deep (Find is super slow on os x)
2452                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2453                                         $File::Find::prune = 1;
2454                                         return;
2455                                 }
2456
2457                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2458                                 # we check related file in $projectroot
2459                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2460                                 if (check_export_ok("$projectroot/$path")) {
2461                                         push @list, { path => $path };
2462                                         $File::Find::prune = 1;
2463                                 }
2464                         },
2465                 }, "$dir");
2466
2467         } elsif (-f $projects_list) {
2468                 # read from file(url-encoded):
2469                 # 'git%2Fgit.git Linus+Torvalds'
2470                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2471                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2472                 my %paths;
2473                 open my $fd, '<', $projects_list or return;
2474         PROJECT:
2475                 while (my $line = <$fd>) {
2476                         chomp $line;
2477                         my ($path, $owner) = split ' ', $line;
2478                         $path = unescape($path);
2479                         $owner = unescape($owner);
2480                         if (!defined $path) {
2481                                 next;
2482                         }
2483                         if ($filter ne '') {
2484                                 # looking for forks;
2485                                 my $pfx = substr($path, 0, length($filter));
2486                                 if ($pfx ne $filter) {
2487                                         next PROJECT;
2488                                 }
2489                                 my $sfx = substr($path, length($filter));
2490                                 if ($sfx !~ /^\/.*\.git$/) {
2491                                         next PROJECT;
2492                                 }
2493                         } elsif ($check_forks) {
2494                         PATH:
2495                                 foreach my $filter (keys %paths) {
2496                                         # looking for forks;
2497                                         my $pfx = substr($path, 0, length($filter));
2498                                         if ($pfx ne $filter) {
2499                                                 next PATH;
2500                                         }
2501                                         my $sfx = substr($path, length($filter));
2502                                         if ($sfx !~ /^\/.*\.git$/) {
2503                                                 next PATH;
2504                                         }
2505                                         # is a fork, don't include it in
2506                                         # the list
2507                                         next PROJECT;
2508                                 }
2509                         }
2510                         if (check_export_ok("$projectroot/$path")) {
2511                                 my $pr = {
2512                                         path => $path,
2513                                         owner => to_utf8($owner),
2514                                 };
2515                                 push @list, $pr;
2516                                 (my $forks_path = $path) =~ s/\.git$//;
2517                                 $paths{$forks_path}++;
2518                         }
2519                 }
2520                 close $fd;
2521         }
2522         return @list;
2523 }
2524
2525 our $gitweb_project_owner = undef;
2526 sub git_get_project_list_from_file {
2527
2528         return if (defined $gitweb_project_owner);
2529
2530         $gitweb_project_owner = {};
2531         # read from file (url-encoded):
2532         # 'git%2Fgit.git Linus+Torvalds'
2533         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2534         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2535         if (-f $projects_list) {
2536                 open(my $fd, '<', $projects_list);
2537                 while (my $line = <$fd>) {
2538                         chomp $line;
2539                         my ($pr, $ow) = split ' ', $line;
2540                         $pr = unescape($pr);
2541                         $ow = unescape($ow);
2542                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2543                 }
2544                 close $fd;
2545         }
2546 }
2547
2548 sub git_get_project_owner {
2549         my $project = shift;
2550         my $owner;
2551
2552         return undef unless $project;
2553         $git_dir = "$projectroot/$project";
2554
2555         if (!defined $gitweb_project_owner) {
2556                 git_get_project_list_from_file();
2557         }
2558
2559         if (exists $gitweb_project_owner->{$project}) {
2560                 $owner = $gitweb_project_owner->{$project};
2561         }
2562         if (!defined $owner){
2563                 $owner = git_get_project_config('owner');
2564         }
2565         if (!defined $owner) {
2566                 $owner = get_file_owner("$git_dir");
2567         }
2568
2569         return $owner;
2570 }
2571
2572 sub git_get_last_activity {
2573         my ($path) = @_;
2574         my $fd;
2575
2576         $git_dir = "$projectroot/$path";
2577         open($fd, "-|", git_cmd(), 'for-each-ref',
2578              '--format=%(committer)',
2579              '--sort=-committerdate',
2580              '--count=1',
2581              'refs/heads') or return;
2582         my $most_recent = <$fd>;
2583         close $fd or return;
2584         if (defined $most_recent &&
2585             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2586                 my $timestamp = $1;
2587                 my $age = time - $timestamp;
2588                 return ($age, age_string($age));
2589         }
2590         return (undef, undef);
2591 }
2592
2593 sub git_get_references {
2594         my $type = shift || "";
2595         my %refs;
2596         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2597         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2598         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2599                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2600                 or return;
2601
2602         while (my $line = <$fd>) {
2603                 chomp $line;
2604                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2605                         if (defined $refs{$1}) {
2606                                 push @{$refs{$1}}, $2;
2607                         } else {
2608                                 $refs{$1} = [ $2 ];
2609                         }
2610                 }
2611         }
2612         close $fd or return;
2613         return \%refs;
2614 }
2615
2616 sub git_get_rev_name_tags {
2617         my $hash = shift || return undef;
2618
2619         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2620                 or return;
2621         my $name_rev = <$fd>;
2622         close $fd;
2623
2624         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2625                 return $1;
2626         } else {
2627                 # catches also '$hash undefined' output
2628                 return undef;
2629         }
2630 }
2631
2632 ## ----------------------------------------------------------------------
2633 ## parse to hash functions
2634
2635 sub parse_date {
2636         my $epoch = shift;
2637         my $tz = shift || "-0000";
2638
2639         my %date;
2640         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2641         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2642         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2643         $date{'hour'} = $hour;
2644         $date{'minute'} = $min;
2645         $date{'mday'} = $mday;
2646         $date{'day'} = $days[$wday];
2647         $date{'month'} = $months[$mon];
2648         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2649                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2650         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2651                              $mday, $months[$mon], $hour ,$min;
2652         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2653                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2654
2655         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2656         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2657         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2658         $date{'hour_local'} = $hour;
2659         $date{'minute_local'} = $min;
2660         $date{'tz_local'} = $tz;
2661         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2662                                   1900+$year, $mon+1, $mday,
2663                                   $hour, $min, $sec, $tz);
2664         return %date;
2665 }
2666
2667 sub parse_tag {
2668         my $tag_id = shift;
2669         my %tag;
2670         my @comment;
2671
2672         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2673         $tag{'id'} = $tag_id;
2674         while (my $line = <$fd>) {
2675                 chomp $line;
2676                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2677                         $tag{'object'} = $1;
2678                 } elsif ($line =~ m/^type (.+)$/) {
2679                         $tag{'type'} = $1;
2680                 } elsif ($line =~ m/^tag (.+)$/) {
2681                         $tag{'name'} = $1;
2682                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2683                         $tag{'author'} = $1;
2684                         $tag{'author_epoch'} = $2;
2685                         $tag{'author_tz'} = $3;
2686                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2687                                 $tag{'author_name'}  = $1;
2688                                 $tag{'author_email'} = $2;
2689                         } else {
2690                                 $tag{'author_name'} = $tag{'author'};
2691                         }
2692                 } elsif ($line =~ m/--BEGIN/) {
2693                         push @comment, $line;
2694                         last;
2695                 } elsif ($line eq "") {
2696                         last;
2697                 }
2698         }
2699         push @comment, <$fd>;
2700         $tag{'comment'} = \@comment;
2701         close $fd or return;
2702         if (!defined $tag{'name'}) {
2703                 return
2704         };
2705         return %tag
2706 }
2707
2708 sub parse_commit_text {
2709         my ($commit_text, $withparents) = @_;
2710         my @commit_lines = split '\n', $commit_text;
2711         my %co;
2712
2713         pop @commit_lines; # Remove '\0'
2714
2715         if (! @commit_lines) {
2716                 return;
2717         }
2718
2719         my $header = shift @commit_lines;
2720         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2721                 return;
2722         }
2723         ($co{'id'}, my @parents) = split ' ', $header;
2724         while (my $line = shift @commit_lines) {
2725                 last if $line eq "\n";
2726                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2727                         $co{'tree'} = $1;
2728                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2729                         push @parents, $1;
2730                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2731                         $co{'author'} = to_utf8($1);
2732                         $co{'author_epoch'} = $2;
2733                         $co{'author_tz'} = $3;
2734                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2735                                 $co{'author_name'}  = $1;
2736                                 $co{'author_email'} = $2;
2737                         } else {
2738                                 $co{'author_name'} = $co{'author'};
2739                         }
2740                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2741                         $co{'committer'} = to_utf8($1);
2742                         $co{'committer_epoch'} = $2;
2743                         $co{'committer_tz'} = $3;
2744                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2745                                 $co{'committer_name'}  = $1;
2746                                 $co{'committer_email'} = $2;
2747                         } else {
2748                                 $co{'committer_name'} = $co{'committer'};
2749                         }
2750                 }
2751         }
2752         if (!defined $co{'tree'}) {
2753                 return;
2754         };
2755         $co{'parents'} = \@parents;
2756         $co{'parent'} = $parents[0];
2757
2758         foreach my $title (@commit_lines) {
2759                 $title =~ s/^    //;
2760                 if ($title ne "") {
2761                         $co{'title'} = chop_str($title, 80, 5);
2762                         # remove leading stuff of merges to make the interesting part visible
2763                         if (length($title) > 50) {
2764                                 $title =~ s/^Automatic //;
2765                                 $title =~ s/^merge (of|with) /Merge ... /i;
2766                                 if (length($title) > 50) {
2767                                         $title =~ s/(http|rsync):\/\///;
2768                                 }
2769                                 if (length($title) > 50) {
2770                                         $title =~ s/(master|www|rsync)\.//;
2771                                 }
2772                                 if (length($title) > 50) {
2773                                         $title =~ s/kernel.org:?//;
2774                                 }
2775                                 if (length($title) > 50) {
2776                                         $title =~ s/\/pub\/scm//;
2777                                 }
2778                         }
2779                         $co{'title_short'} = chop_str($title, 50, 5);
2780                         last;
2781                 }
2782         }
2783         if (! defined $co{'title'} || $co{'title'} eq "") {
2784                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2785         }
2786         # remove added spaces
2787         foreach my $line (@commit_lines) {
2788                 $line =~ s/^    //;
2789         }
2790         $co{'comment'} = \@commit_lines;
2791
2792         my $age = time - $co{'committer_epoch'};
2793         $co{'age'} = $age;
2794         $co{'age_string'} = age_string($age);
2795         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2796         if ($age > 60*60*24*7*2) {
2797                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2798                 $co{'age_string_age'} = $co{'age_string'};
2799         } else {
2800                 $co{'age_string_date'} = $co{'age_string'};
2801                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2802         }
2803         return %co;
2804 }
2805
2806 sub parse_commit {
2807         my ($commit_id) = @_;
2808         my %co;
2809
2810         local $/ = "\0";
2811
2812         open my $fd, "-|", git_cmd(), "rev-list",
2813                 "--parents",
2814                 "--header",
2815                 "--max-count=1",
2816                 $commit_id,
2817                 "--",
2818                 or die_error(500, "Open git-rev-list failed");
2819         %co = parse_commit_text(<$fd>, 1);
2820         close $fd;
2821
2822         return %co;
2823 }
2824
2825 sub parse_commits {
2826         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2827         my @cos;
2828
2829         $maxcount ||= 1;
2830         $skip ||= 0;
2831
2832         local $/ = "\0";
2833
2834         open my $fd, "-|", git_cmd(), "rev-list",
2835                 "--header",
2836                 @args,
2837                 ("--max-count=" . $maxcount),
2838                 ("--skip=" . $skip),
2839                 @extra_options,
2840                 $commit_id,
2841                 "--",
2842                 ($filename ? ($filename) : ())
2843                 or die_error(500, "Open git-rev-list failed");
2844         while (my $line = <$fd>) {
2845                 my %co = parse_commit_text($line);
2846                 push @cos, \%co;
2847         }
2848         close $fd;
2849
2850         return wantarray ? @cos : \@cos;
2851 }
2852
2853 # parse line of git-diff-tree "raw" output
2854 sub parse_difftree_raw_line {
2855         my $line = shift;
2856         my %res;
2857
2858         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2859         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2860         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2861                 $res{'from_mode'} = $1;
2862                 $res{'to_mode'} = $2;
2863                 $res{'from_id'} = $3;
2864                 $res{'to_id'} = $4;
2865                 $res{'status'} = $5;
2866                 $res{'similarity'} = $6;
2867                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2868                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2869                 } else {
2870                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2871                 }
2872         }
2873         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2874         # combined diff (for merge commit)
2875         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2876                 $res{'nparents'}  = length($1);
2877                 $res{'from_mode'} = [ split(' ', $2) ];
2878                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2879                 $res{'from_id'} = [ split(' ', $3) ];
2880                 $res{'to_id'} = pop @{$res{'from_id'}};
2881                 $res{'status'} = [ split('', $4) ];
2882                 $res{'to_file'} = unquote($5);
2883         }
2884         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2885         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2886                 $res{'commit'} = $1;
2887         }
2888
2889         return wantarray ? %res : \%res;
2890 }
2891
2892 # wrapper: return parsed line of git-diff-tree "raw" output
2893 # (the argument might be raw line, or parsed info)
2894 sub parsed_difftree_line {
2895         my $line_or_ref = shift;
2896
2897         if (ref($line_or_ref) eq "HASH") {
2898                 # pre-parsed (or generated by hand)
2899                 return $line_or_ref;
2900         } else {
2901                 return parse_difftree_raw_line($line_or_ref);
2902         }
2903 }
2904
2905 # parse line of git-ls-tree output
2906 sub parse_ls_tree_line {
2907         my $line = shift;
2908         my %opts = @_;
2909         my %res;
2910
2911         if ($opts{'-l'}) {
2912                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
2913                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
2914
2915                 $res{'mode'} = $1;
2916                 $res{'type'} = $2;
2917                 $res{'hash'} = $3;
2918                 $res{'size'} = $4;
2919                 if ($opts{'-z'}) {
2920                         $res{'name'} = $5;
2921                 } else {
2922                         $res{'name'} = unquote($5);
2923                 }
2924         } else {
2925                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2926                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2927
2928                 $res{'mode'} = $1;
2929                 $res{'type'} = $2;
2930                 $res{'hash'} = $3;
2931                 if ($opts{'-z'}) {
2932                         $res{'name'} = $4;
2933                 } else {
2934                         $res{'name'} = unquote($4);
2935                 }
2936         }
2937
2938         return wantarray ? %res : \%res;
2939 }
2940
2941 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2942 sub parse_from_to_diffinfo {
2943         my ($diffinfo, $from, $to, @parents) = @_;
2944
2945         if ($diffinfo->{'nparents'}) {
2946                 # combined diff
2947                 $from->{'file'} = [];
2948                 $from->{'href'} = [];
2949                 fill_from_file_info($diffinfo, @parents)
2950                         unless exists $diffinfo->{'from_file'};
2951                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2952                         $from->{'file'}[$i] =
2953                                 defined $diffinfo->{'from_file'}[$i] ?
2954                                         $diffinfo->{'from_file'}[$i] :
2955                                         $diffinfo->{'to_file'};
2956                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2957                                 $from->{'href'}[$i] = href(action=>"blob",
2958                                                            hash_base=>$parents[$i],
2959                                                            hash=>$diffinfo->{'from_id'}[$i],
2960                                                            file_name=>$from->{'file'}[$i]);
2961                         } else {
2962                                 $from->{'href'}[$i] = undef;
2963                         }
2964                 }
2965         } else {
2966                 # ordinary (not combined) diff
2967                 $from->{'file'} = $diffinfo->{'from_file'};
2968                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2969                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2970                                                hash=>$diffinfo->{'from_id'},
2971                                                file_name=>$from->{'file'});
2972                 } else {
2973                         delete $from->{'href'};
2974                 }
2975         }
2976
2977         $to->{'file'} = $diffinfo->{'to_file'};
2978         if (!is_deleted($diffinfo)) { # file exists in result
2979                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2980                                      hash=>$diffinfo->{'to_id'},
2981                                      file_name=>$to->{'file'});
2982         } else {
2983                 delete $to->{'href'};
2984         }
2985 }
2986
2987 ## ......................................................................
2988 ## parse to array of hashes functions
2989
2990 sub git_get_heads_list {
2991         my $limit = shift;
2992         my @headslist;
2993
2994         open my $fd, '-|', git_cmd(), 'for-each-ref',
2995                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2996                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2997                 'refs/heads'
2998                 or return;
2999         while (my $line = <$fd>) {
3000                 my %ref_item;
3001
3002                 chomp $line;
3003                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3004                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3005                 my ($committer, $epoch, $tz) =
3006                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3007                 $ref_item{'fullname'}  = $name;
3008                 $name =~ s!^refs/heads/!!;
3009
3010                 $ref_item{'name'}  = $name;
3011                 $ref_item{'id'}    = $hash;
3012                 $ref_item{'title'} = $title || '(no commit message)';
3013                 $ref_item{'epoch'} = $epoch;
3014                 if ($epoch) {
3015                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3016                 } else {
3017                         $ref_item{'age'} = "unknown";
3018                 }
3019
3020                 push @headslist, \%ref_item;
3021         }
3022         close $fd;
3023
3024         return wantarray ? @headslist : \@headslist;
3025 }
3026
3027 sub git_get_tags_list {
3028         my $limit = shift;
3029         my @tagslist;
3030
3031         open my $fd, '-|', git_cmd(), 'for-each-ref',
3032                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3033                 '--format=%(objectname) %(objecttype) %(refname) '.
3034                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3035                 'refs/tags'
3036                 or return;
3037         while (my $line = <$fd>) {
3038                 my %ref_item;
3039
3040                 chomp $line;
3041                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3042                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3043                 my ($creator, $epoch, $tz) =
3044                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3045                 $ref_item{'fullname'} = $name;
3046                 $name =~ s!^refs/tags/!!;
3047
3048                 $ref_item{'type'} = $type;
3049                 $ref_item{'id'} = $id;
3050                 $ref_item{'name'} = $name;
3051                 if ($type eq "tag") {
3052                         $ref_item{'subject'} = $title;
3053                         $ref_item{'reftype'} = $reftype;
3054                         $ref_item{'refid'}   = $refid;
3055                 } else {
3056                         $ref_item{'reftype'} = $type;
3057                         $ref_item{'refid'}   = $id;
3058                 }
3059
3060                 if ($type eq "tag" || $type eq "commit") {
3061                         $ref_item{'epoch'} = $epoch;
3062                         if ($epoch) {
3063                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3064                         } else {
3065                                 $ref_item{'age'} = "unknown";
3066                         }
3067                 }
3068
3069                 push @tagslist, \%ref_item;
3070         }
3071         close $fd;
3072
3073         return wantarray ? @tagslist : \@tagslist;
3074 }
3075
3076 ## ----------------------------------------------------------------------
3077 ## filesystem-related functions
3078
3079 sub get_file_owner {
3080         my $path = shift;
3081
3082         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3083         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3084         if (!defined $gcos) {
3085                 return undef;
3086         }
3087         my $owner = $gcos;
3088         $owner =~ s/[,;].*$//;
3089         return to_utf8($owner);
3090 }
3091
3092 # assume that file exists
3093 sub insert_file {
3094         my $filename = shift;
3095
3096         open my $fd, '<', $filename;
3097         print map { to_utf8($_) } <$fd>;
3098         close $fd;
3099 }
3100
3101 ## ......................................................................
3102 ## mimetype related functions
3103
3104 sub mimetype_guess_file {
3105         my $filename = shift;
3106         my $mimemap = shift;
3107         -r $mimemap or return undef;
3108
3109         my %mimemap;
3110         open(my $mh, '<', $mimemap) or return undef;
3111         while (<$mh>) {
3112                 next if m/^#/; # skip comments
3113                 my ($mimetype, $exts) = split(/\t+/);
3114                 if (defined $exts) {
3115                         my @exts = split(/\s+/, $exts);
3116                         foreach my $ext (@exts) {
3117                                 $mimemap{$ext} = $mimetype;
3118                         }
3119                 }
3120         }
3121         close($mh);
3122
3123         $filename =~ /\.([^.]*)$/;
3124         return $mimemap{$1};
3125 }
3126
3127 sub mimetype_guess {
3128         my $filename = shift;
3129         my $mime;
3130         $filename =~ /\./ or return undef;
3131
3132         if ($mimetypes_file) {
3133                 my $file = $mimetypes_file;
3134                 if ($file !~ m!^/!) { # if it is relative path
3135                         # it is relative to project
3136                         $file = "$projectroot/$project/$file";
3137                 }
3138                 $mime = mimetype_guess_file($filename, $file);
3139         }
3140         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3141         return $mime;
3142 }
3143
3144 sub blob_mimetype {
3145         my $fd = shift;
3146         my $filename = shift;
3147
3148         if ($filename) {
3149                 my $mime = mimetype_guess($filename);
3150                 $mime and return $mime;
3151         }
3152
3153         # just in case
3154         return $default_blob_plain_mimetype unless $fd;
3155
3156         if (-T $fd) {
3157                 return 'text/plain';
3158         } elsif (! $filename) {
3159                 return 'application/octet-stream';
3160         } elsif ($filename =~ m/\.png$/i) {
3161                 return 'image/png';
3162         } elsif ($filename =~ m/\.gif$/i) {
3163                 return 'image/gif';
3164         } elsif ($filename =~ m/\.jpe?g$/i) {
3165                 return 'image/jpeg';
3166         } else {
3167                 return 'application/octet-stream';
3168         }
3169 }
3170
3171 sub blob_contenttype {
3172         my ($fd, $file_name, $type) = @_;
3173
3174         $type ||= blob_mimetype($fd, $file_name);
3175         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3176                 $type .= "; charset=$default_text_plain_charset";
3177         }
3178
3179         return $type;
3180 }
3181
3182 ## ======================================================================
3183 ## functions printing HTML: header, footer, error page
3184
3185 sub get_page_title {
3186         my $title = to_utf8($site_name);
3187
3188         return $title unless (defined $project);
3189         $title .= " - " . to_utf8($project);
3190
3191         return $title unless (defined $action);
3192         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3193
3194         return $title unless (defined $file_name);
3195         $title .= " - " . esc_path($file_name);
3196         if ($action eq "tree" && $file_name !~ m|/$|) {
3197                 $title .= "/";
3198         }
3199
3200         return $title;
3201 }
3202
3203 sub git_header_html {
3204         my $status = shift || "200 OK";
3205         my $expires = shift;
3206         my %opts = @_;
3207
3208         my $title = get_page_title();
3209         my $content_type;
3210         # require explicit support from the UA if we are to send the page as
3211         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3212         # we have to do this because MSIE sometimes globs '*/*', pretending to
3213         # support xhtml+xml but choking when it gets what it asked for.
3214         if (defined $cgi->http('HTTP_ACCEPT') &&
3215             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3216             $cgi->Accept('application/xhtml+xml') != 0) {
3217                 $content_type = 'application/xhtml+xml';
3218         } else {
3219                 $content_type = 'text/html';
3220         }
3221         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3222                            -status=> $status, -expires => $expires)
3223                 unless ($opts{'-no_http_headers'});
3224         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3225         print <<EOF;
3226 <?xml version="1.0" encoding="utf-8"?>
3227 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3228 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3229 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3230 <!-- git core binaries version $git_version -->
3231 <head>
3232 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3233 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3234 <meta name="robots" content="index, nofollow"/>
3235 <title>$title</title>
3236 EOF
3237         # the stylesheet, favicon etc urls won't work correctly with path_info
3238         # unless we set the appropriate base URL
3239         if ($ENV{'PATH_INFO'}) {
3240                 print "<base href=\"".esc_url($base_url)."\" />\n";
3241         }
3242         # print out each stylesheet that exist, providing backwards capability
3243         # for those people who defined $stylesheet in a config file
3244         if (defined $stylesheet) {
3245                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3246         } else {
3247                 foreach my $stylesheet (@stylesheets) {
3248                         next unless $stylesheet;
3249                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3250                 }
3251         }
3252         if (defined $project) {
3253                 my %href_params = get_feed_info();
3254                 if (!exists $href_params{'-title'}) {
3255                         $href_params{'-title'} = 'log';
3256                 }
3257
3258                 foreach my $format qw(RSS Atom) {
3259                         my $type = lc($format);
3260                         my %link_attr = (
3261                                 '-rel' => 'alternate',
3262                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3263                                 '-type' => "application/$type+xml"
3264                         );
3265
3266                         $href_params{'action'} = $type;
3267                         $link_attr{'-href'} = href(%href_params);
3268                         print "<link ".
3269                               "rel=\"$link_attr{'-rel'}\" ".
3270                               "title=\"$link_attr{'-title'}\" ".
3271                               "href=\"$link_attr{'-href'}\" ".
3272                               "type=\"$link_attr{'-type'}\" ".
3273                               "/>\n";
3274
3275                         $href_params{'extra_options'} = '--no-merges';
3276                         $link_attr{'-href'} = href(%href_params);
3277                         $link_attr{'-title'} .= ' (no merges)';
3278                         print "<link ".
3279                               "rel=\"$link_attr{'-rel'}\" ".
3280                               "title=\"$link_attr{'-title'}\" ".
3281                               "href=\"$link_attr{'-href'}\" ".
3282                               "type=\"$link_attr{'-type'}\" ".
3283                               "/>\n";
3284                 }
3285
3286         } else {
3287                 printf('<link rel="alternate" title="%s projects list" '.
3288                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3289                        $site_name, href(project=>undef, action=>"project_index"));
3290                 printf('<link rel="alternate" title="%s projects feeds" '.
3291                        'href="%s" type="text/x-opml" />'."\n",
3292                        $site_name, href(project=>undef, action=>"opml"));
3293         }
3294         if (defined $favicon) {
3295                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3296         }
3297
3298         print "</head>\n" .
3299               "<body>\n";
3300
3301         if (defined $site_header && -f $site_header) {
3302                 insert_file($site_header);
3303         }
3304
3305         print "<div class=\"page_header\">\n" .
3306               $cgi->a({-href => esc_url($logo_url),
3307                        -title => $logo_label},
3308                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3309         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3310         if (defined $project) {
3311                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3312                 if (defined $action) {
3313                         print " / $action";
3314                 }
3315                 print "\n";
3316         }
3317         print "</div>\n";
3318
3319         my $have_search = gitweb_check_feature('search');
3320         if (defined $project && $have_search) {
3321                 if (!defined $searchtext) {
3322                         $searchtext = "";
3323                 }
3324                 my $search_hash;
3325                 if (defined $hash_base) {
3326                         $search_hash = $hash_base;
3327                 } elsif (defined $hash) {
3328                         $search_hash = $hash;
3329                 } else {
3330                         $search_hash = "HEAD";
3331                 }
3332                 my $action = $my_uri;
3333                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3334                 if ($use_pathinfo) {
3335                         $action .= "/".esc_url($project);
3336                 }
3337                 print $cgi->startform(-method => "get", -action => $action) .
3338                       "<div class=\"search\">\n" .
3339                       (!$use_pathinfo &&
3340                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3341                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3342                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3343                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3344                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3345                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3346                       " search:\n",
3347                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3348                       "<span title=\"Extended regular expression\">" .
3349                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3350                                      -checked => $search_use_regexp) .
3351                       "</span>" .
3352                       "</div>" .
3353                       $cgi->end_form() . "\n";
3354         }
3355 }
3356
3357 sub git_footer_html {
3358         my $feed_class = 'rss_logo';
3359
3360         print "<div class=\"page_footer\">\n";
3361         if (defined $project) {
3362                 my $descr = git_get_project_description($project);
3363                 if (defined $descr) {
3364                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3365                 }
3366
3367                 my %href_params = get_feed_info();
3368                 if (!%href_params) {
3369                         $feed_class .= ' generic';
3370                 }
3371                 $href_params{'-title'} ||= 'log';
3372
3373                 foreach my $format qw(RSS Atom) {
3374                         $href_params{'action'} = lc($format);
3375                         print $cgi->a({-href => href(%href_params),
3376                                       -title => "$href_params{'-title'} $format feed",
3377                                       -class => $feed_class}, $format)."\n";
3378                 }
3379
3380         } else {
3381                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3382                               -class => $feed_class}, "OPML") . " ";
3383                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3384                               -class => $feed_class}, "TXT") . "\n";
3385         }
3386         print "</div>\n"; # class="page_footer"
3387
3388         if (defined $t0 && gitweb_check_feature('timed')) {
3389                 print "<div id=\"generating_info\">\n";
3390                 print 'This page took '.
3391                       '<span id="generating_time" class="time_span">'.
3392                       Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
3393                       ' seconds </span>'.
3394                       ' and '.
3395                       '<span id="generating_cmd">'.
3396                       $number_of_git_cmds.
3397                       '</span> git commands '.
3398                       " to generate.\n";
3399                 print "</div>\n"; # class="page_footer"
3400         }
3401
3402         if (defined $site_footer && -f $site_footer) {
3403                 insert_file($site_footer);
3404         }
3405
3406         print qq!<script type="text/javascript" src="$javascript"></script>\n!;
3407         if (defined $action &&
3408             $action eq 'blame_incremental') {
3409                 print qq!<script type="text/javascript">\n!.
3410                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3411                       qq!           "!. href() .qq!");\n!.
3412                       qq!</script>\n!;
3413         } elsif (gitweb_check_feature('javascript-actions')) {
3414                 print qq!<script type="text/javascript">\n!.
3415                       qq!window.onload = fixLinks;\n!.
3416                       qq!</script>\n!;
3417         }
3418
3419         print "</body>\n" .
3420               "</html>";
3421 }
3422
3423 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3424 # Example: die_error(404, 'Hash not found')
3425 # By convention, use the following status codes (as defined in RFC 2616):
3426 # 400: Invalid or missing CGI parameters, or
3427 #      requested object exists but has wrong type.
3428 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3429 #      this server or project.
3430 # 404: Requested object/revision/project doesn't exist.
3431 # 500: The server isn't configured properly, or
3432 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3433 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3434 # 503: The server is currently unavailable (because it is overloaded,
3435 #      or down for maintenance).  Generally, this is a temporary state.
3436 sub die_error {
3437         my $status = shift || 500;
3438         my $error = esc_html(shift) || "Internal Server Error";
3439         my $extra = shift;
3440         my %opts = @_;
3441
3442         my %http_responses = (
3443                 400 => '400 Bad Request',
3444                 403 => '403 Forbidden',
3445                 404 => '404 Not Found',
3446                 500 => '500 Internal Server Error',
3447                 503 => '503 Service Unavailable',
3448         );
3449         git_header_html($http_responses{$status}, undef, %opts);
3450         print <<EOF;
3451 <div class="page_body">
3452 <br /><br />
3453 $status - $error
3454 <br />
3455 EOF
3456         if (defined $extra) {
3457                 print "<hr />\n" .
3458                       "$extra\n";
3459         }
3460         print "</div>\n";
3461
3462         git_footer_html();
3463         goto DONE_GITWEB
3464                 unless ($opts{'-error_handler'});
3465 }
3466
3467 ## ----------------------------------------------------------------------
3468 ## functions printing or outputting HTML: navigation
3469
3470 sub git_print_page_nav {
3471         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3472         $extra = '' if !defined $extra; # pager or formats
3473
3474         my @navs = qw(summary shortlog log commit commitdiff tree);
3475         if ($suppress) {
3476                 @navs = grep { $_ ne $suppress } @navs;
3477         }
3478
3479         my %arg = map { $_ => {action=>$_} } @navs;
3480         if (defined $head) {
3481                 for (qw(commit commitdiff)) {
3482                         $arg{$_}{'hash'} = $head;
3483                 }
3484                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3485                         for (qw(shortlog log)) {
3486                                 $arg{$_}{'hash'} = $head;
3487                         }
3488                 }
3489         }
3490
3491         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3492         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3493
3494         my @actions = gitweb_get_feature('actions');
3495         my %repl = (
3496                 '%' => '%',
3497                 'n' => $project,         # project name
3498                 'f' => $git_dir,         # project path within filesystem
3499                 'h' => $treehead || '',  # current hash ('h' parameter)
3500                 'b' => $treebase || '',  # hash base ('hb' parameter)
3501         );
3502         while (@actions) {
3503                 my ($label, $link, $pos) = splice(@actions,0,3);
3504                 # insert
3505                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3506                 # munch munch
3507                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3508                 $arg{$label}{'_href'} = $link;
3509         }
3510
3511         print "<div class=\"page_nav\">\n" .
3512                 (join " | ",
3513                  map { $_ eq $current ?
3514                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3515                  } @navs);
3516         print "<br/>\n$extra<br/>\n" .
3517               "</div>\n";
3518 }
3519
3520 sub format_paging_nav {
3521         my ($action, $page, $has_next_link) = @_;
3522         my $paging_nav;
3523
3524
3525         if ($page > 0) {
3526                 $paging_nav .=
3527                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3528                         " &sdot; " .
3529                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3530                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3531         } else {
3532                 $paging_nav .= "first &sdot; prev";
3533         }
3534
3535         if ($has_next_link) {
3536                 $paging_nav .= " &sdot; " .
3537                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3538                                  -accesskey => "n", -title => "Alt-n"}, "next");
3539         } else {
3540                 $paging_nav .= " &sdot; next";
3541         }
3542
3543         return $paging_nav;
3544 }
3545
3546 ## ......................................................................
3547 ## functions printing or outputting HTML: div
3548
3549 sub git_print_header_div {
3550         my ($action, $title, $hash, $hash_base) = @_;
3551         my %args = ();
3552
3553         $args{'action'} = $action;
3554         $args{'hash'} = $hash if $hash;
3555         $args{'hash_base'} = $hash_base if $hash_base;
3556
3557         print "<div class=\"header\">\n" .
3558               $cgi->a({-href => href(%args), -class => "title"},
3559               $title ? $title : $action) .
3560               "\n</div>\n";
3561 }
3562
3563 sub print_local_time {
3564         print format_local_time(@_);
3565 }
3566
3567 sub format_local_time {
3568         my $localtime = '';
3569         my %date = @_;
3570         if ($date{'hour_local'} < 6) {
3571                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3572                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3573         } else {
3574                 $localtime .= sprintf(" (%02d:%02d %s)",
3575                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3576         }
3577
3578         return $localtime;
3579 }
3580
3581 # Outputs the author name and date in long form
3582 sub git_print_authorship {
3583         my $co = shift;
3584         my %opts = @_;
3585         my $tag = $opts{-tag} || 'div';
3586         my $author = $co->{'author_name'};
3587
3588         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3589         print "<$tag class=\"author_date\">" .
3590               format_search_author($author, "author", esc_html($author)) .
3591               " [$ad{'rfc2822'}";
3592         print_local_time(%ad) if ($opts{-localtime});
3593         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3594                   . "</$tag>\n";
3595 }
3596
3597 # Outputs table rows containing the full author or committer information,
3598 # in the format expected for 'commit' view (& similia).
3599 # Parameters are a commit hash reference, followed by the list of people
3600 # to output information for. If the list is empty it defalts to both
3601 # author and committer.
3602 sub git_print_authorship_rows {
3603         my $co = shift;
3604         # too bad we can't use @people = @_ || ('author', 'committer')
3605         my @people = @_;
3606         @people = ('author', 'committer') unless @people;
3607         foreach my $who (@people) {
3608                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3609                 print "<tr><td>$who</td><td>" .
3610                       format_search_author($co->{"${who}_name"}, $who,
3611                                esc_html($co->{"${who}_name"})) . " " .
3612                       format_search_author($co->{"${who}_email"}, $who,
3613                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3614                       "</td><td rowspan=\"2\">" .
3615                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3616                       "</td></tr>\n" .
3617                       "<tr>" .
3618                       "<td></td><td> $wd{'rfc2822'}";
3619                 print_local_time(%wd);
3620                 print "</td>" .
3621                       "</tr>\n";
3622         }
3623 }
3624
3625 sub git_print_page_path {
3626         my $name = shift;
3627         my $type = shift;
3628         my $hb = shift;
3629
3630
3631         print "<div class=\"page_path\">";
3632         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3633                       -title => 'tree root'}, to_utf8("[$project]"));
3634         print " / ";
3635         if (defined $name) {
3636                 my @dirname = split '/', $name;
3637                 my $basename = pop @dirname;
3638                 my $fullname = '';
3639
3640                 foreach my $dir (@dirname) {
3641                         $fullname .= ($fullname ? '/' : '') . $dir;
3642                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3643                                                      hash_base=>$hb),
3644                                       -title => $fullname}, esc_path($dir));
3645                         print " / ";
3646                 }
3647                 if (defined $type && $type eq 'blob') {
3648                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3649                                                      hash_base=>$hb),
3650                                       -title => $name}, esc_path($basename));
3651                 } elsif (defined $type && $type eq 'tree') {
3652                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3653                                                      hash_base=>$hb),
3654                                       -title => $name}, esc_path($basename));
3655                         print " / ";
3656                 } else {
3657                         print esc_path($basename);
3658                 }
3659         }
3660         print "<br/></div>\n";
3661 }
3662
3663 sub git_print_log {
3664         my $log = shift;
3665         my %opts = @_;
3666
3667         if ($opts{'-remove_title'}) {
3668                 # remove title, i.e. first line of log
3669                 shift @$log;
3670         }
3671         # remove leading empty lines
3672         while (defined $log->[0] && $log->[0] eq "") {
3673                 shift @$log;
3674         }
3675
3676         # print log
3677         my $signoff = 0;
3678         my $empty = 0;
3679         foreach my $line (@$log) {
3680                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3681                         $signoff = 1;
3682                         $empty = 0;
3683                         if (! $opts{'-remove_signoff'}) {
3684                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3685                                 next;
3686                         } else {
3687                                 # remove signoff lines
3688                                 next;
3689                         }
3690                 } else {
3691                         $signoff = 0;
3692                 }
3693
3694                 # print only one empty line
3695                 # do not print empty line after signoff
3696                 if ($line eq "") {
3697                         next if ($empty || $signoff);
3698                         $empty = 1;
3699                 } else {
3700                         $empty = 0;
3701                 }
3702
3703                 print format_log_line_html($line) . "<br/>\n";
3704         }
3705
3706         if ($opts{'-final_empty_line'}) {
3707                 # end with single empty line
3708                 print "<br/>\n" unless $empty;
3709         }
3710 }
3711
3712 # return link target (what link points to)
3713 sub git_get_link_target {
3714         my $hash = shift;
3715         my $link_target;
3716
3717         # read link
3718         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3719                 or return;
3720         {
3721                 local $/ = undef;
3722                 $link_target = <$fd>;
3723         }
3724         close $fd
3725                 or return;
3726
3727         return $link_target;
3728 }
3729
3730 # given link target, and the directory (basedir) the link is in,
3731 # return target of link relative to top directory (top tree);
3732 # return undef if it is not possible (including absolute links).
3733 sub normalize_link_target {
3734         my ($link_target, $basedir) = @_;
3735
3736         # absolute symlinks (beginning with '/') cannot be normalized
3737         return if (substr($link_target, 0, 1) eq '/');
3738
3739         # normalize link target to path from top (root) tree (dir)
3740         my $path;
3741         if ($basedir) {
3742                 $path = $basedir . '/' . $link_target;
3743         } else {
3744                 # we are in top (root) tree (dir)
3745                 $path = $link_target;
3746         }
3747
3748         # remove //, /./, and /../
3749         my @path_parts;
3750         foreach my $part (split('/', $path)) {
3751                 # discard '.' and ''
3752                 next if (!$part || $part eq '.');
3753                 # handle '..'
3754                 if ($part eq '..') {
3755                         if (@path_parts) {
3756                                 pop @path_parts;
3757                         } else {
3758                                 # link leads outside repository (outside top dir)
3759                                 return;
3760                         }
3761                 } else {
3762                         push @path_parts, $part;
3763                 }
3764         }
3765         $path = join('/', @path_parts);
3766
3767         return $path;
3768 }
3769
3770 # print tree entry (row of git_tree), but without encompassing <tr> element
3771 sub git_print_tree_entry {
3772         my ($t, $basedir, $hash_base, $have_blame) = @_;
3773
3774         my %base_key = ();
3775         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3776
3777         # The format of a table row is: mode list link.  Where mode is
3778         # the mode of the entry, list is the name of the entry, an href,
3779         # and link is the action links of the entry.
3780
3781         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3782         if (exists $t->{'size'}) {
3783                 print "<td class=\"size\">$t->{'size'}</td>\n";
3784         }
3785         if ($t->{'type'} eq "blob") {
3786                 print "<td class=\"list\">" .
3787                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3788                                                file_name=>"$basedir$t->{'name'}", %base_key),
3789                                 -class => "list"}, esc_path($t->{'name'}));
3790                 if (S_ISLNK(oct $t->{'mode'})) {
3791                         my $link_target = git_get_link_target($t->{'hash'});
3792                         if ($link_target) {
3793                                 my $norm_target = normalize_link_target($link_target, $basedir);
3794                                 if (defined $norm_target) {
3795                                         print " -> " .
3796                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3797                                                                      file_name=>$norm_target),
3798                                                        -title => $norm_target}, esc_path($link_target));
3799                                 } else {
3800                                         print " -> " . esc_path($link_target);
3801                                 }
3802                         }
3803                 }
3804                 print "</td>\n";
3805                 print "<td class=\"link\">";
3806                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3807                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3808                               "blob");
3809                 if ($have_blame) {
3810                         print " | " .
3811                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3812                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3813                                       "blame");
3814                 }
3815                 if (defined $hash_base) {
3816                         print " | " .
3817                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3818                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3819                                       "history");
3820                 }
3821                 print " | " .
3822                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3823                                                file_name=>"$basedir$t->{'name'}")},
3824                                 "raw");
3825                 print "</td>\n";
3826
3827         } elsif ($t->{'type'} eq "tree") {
3828                 print "<td class=\"list\">";
3829                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3830                                              file_name=>"$basedir$t->{'name'}",
3831                                              %base_key)},
3832                               esc_path($t->{'name'}));
3833                 print "</td>\n";
3834                 print "<td class=\"link\">";
3835                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3836                                              file_name=>"$basedir$t->{'name'}",
3837                                              %base_key)},
3838                               "tree");
3839                 if (defined $hash_base) {
3840                         print " | " .
3841                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3842                                                      file_name=>"$basedir$t->{'name'}")},
3843                                       "history");
3844                 }
3845                 print "</td>\n";
3846         } else {
3847                 # unknown object: we can only present history for it
3848                 # (this includes 'commit' object, i.e. submodule support)
3849                 print "<td class=\"list\">" .
3850                       esc_path($t->{'name'}) .
3851                       "</td>\n";
3852                 print "<td class=\"link\">";
3853                 if (defined $hash_base) {
3854                         print $cgi->a({-href => href(action=>"history",
3855                                                      hash_base=>$hash_base,
3856                                                      file_name=>"$basedir$t->{'name'}")},
3857                                       "history");
3858                 }
3859                 print "</td>\n";
3860         }
3861 }
3862
3863 ## ......................................................................
3864 ## functions printing large fragments of HTML
3865
3866 # get pre-image filenames for merge (combined) diff
3867 sub fill_from_file_info {
3868         my ($diff, @parents) = @_;
3869
3870         $diff->{'from_file'} = [ ];
3871         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3872         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3873                 if ($diff->{'status'}[$i] eq 'R' ||
3874                     $diff->{'status'}[$i] eq 'C') {
3875                         $diff->{'from_file'}[$i] =
3876                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3877                 }
3878         }
3879
3880         return $diff;
3881 }
3882
3883 # is current raw difftree line of file deletion
3884 sub is_deleted {
3885         my $diffinfo = shift;
3886
3887         return $diffinfo->{'to_id'} eq ('0' x 40);
3888 }
3889
3890 # does patch correspond to [previous] difftree raw line
3891 # $diffinfo  - hashref of parsed raw diff format
3892 # $patchinfo - hashref of parsed patch diff format
3893 #              (the same keys as in $diffinfo)
3894 sub is_patch_split {
3895         my ($diffinfo, $patchinfo) = @_;
3896
3897         return defined $diffinfo && defined $patchinfo
3898                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3899 }
3900
3901
3902 sub git_difftree_body {
3903         my ($difftree, $hash, @parents) = @_;
3904         my ($parent) = $parents[0];
3905         my $have_blame = gitweb_check_feature('blame');
3906         print "<div class=\"list_head\">\n";
3907         if ($#{$difftree} > 10) {
3908                 print(($#{$difftree} + 1) . " files changed:\n");
3909         }
3910         print "</div>\n";
3911
3912         print "<table class=\"" .
3913               (@parents > 1 ? "combined " : "") .
3914               "diff_tree\">\n";
3915
3916         # header only for combined diff in 'commitdiff' view
3917         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3918         if ($has_header) {
3919                 # table header
3920                 print "<thead><tr>\n" .
3921                        "<th></th><th></th>\n"; # filename, patchN link
3922                 for (my $i = 0; $i < @parents; $i++) {
3923                         my $par = $parents[$i];
3924                         print "<th>" .
3925                               $cgi->a({-href => href(action=>"commitdiff",
3926                                                      hash=>$hash, hash_parent=>$par),
3927                                        -title => 'commitdiff to parent number ' .
3928                                                   ($i+1) . ': ' . substr($par,0,7)},
3929                                       $i+1) .
3930                               "&nbsp;</th>\n";
3931                 }
3932                 print "</tr></thead>\n<tbody>\n";
3933         }
3934
3935         my $alternate = 1;
3936         my $patchno = 0;
3937         foreach my $line (@{$difftree}) {
3938                 my $diff = parsed_difftree_line($line);
3939
3940                 if ($alternate) {
3941                         print "<tr class=\"dark\">\n";
3942                 } else {
3943                         print "<tr class=\"light\">\n";
3944                 }
3945                 $alternate ^= 1;
3946
3947                 if (exists $diff->{'nparents'}) { # combined diff
3948
3949                         fill_from_file_info($diff, @parents)
3950                                 unless exists $diff->{'from_file'};
3951
3952                         if (!is_deleted($diff)) {
3953                                 # file exists in the result (child) commit
3954                                 print "<td>" .
3955                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3956                                                              file_name=>$diff->{'to_file'},
3957                                                              hash_base=>$hash),
3958                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3959                                       "</td>\n";
3960                         } else {
3961                                 print "<td>" .
3962                                       esc_path($diff->{'to_file'}) .
3963                                       "</td>\n";
3964                         }
3965
3966                         if ($action eq 'commitdiff') {
3967                                 # link to patch
3968                                 $patchno++;
3969                                 print "<td class=\"link\">" .
3970                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3971                                       " | " .
3972                                       "</td>\n";
3973                         }
3974
3975                         my $has_history = 0;
3976                         my $not_deleted = 0;
3977                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3978                                 my $hash_parent = $parents[$i];
3979                                 my $from_hash = $diff->{'from_id'}[$i];
3980                                 my $from_path = $diff->{'from_file'}[$i];
3981                                 my $status = $diff->{'status'}[$i];
3982
3983                                 $has_history ||= ($status ne 'A');
3984                                 $not_deleted ||= ($status ne 'D');
3985
3986                                 if ($status eq 'A') {
3987                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3988                                 } elsif ($status eq 'D') {
3989                                         print "<td class=\"link\">" .
3990                                               $cgi->a({-href => href(action=>"blob",
3991                                                                      hash_base=>$hash,
3992                                                                      hash=>$from_hash,
3993                                                                      file_name=>$from_path)},
3994                                                       "blob" . ($i+1)) .
3995                                               " | </td>\n";
3996                                 } else {
3997                                         if ($diff->{'to_id'} eq $from_hash) {
3998                                                 print "<td class=\"link nochange\">";
3999                                         } else {
4000                                                 print "<td class=\"link\">";
4001                                         }
4002                                         print $cgi->a({-href => href(action=>"blobdiff",
4003                                                                      hash=>$diff->{'to_id'},
4004                                                                      hash_parent=>$from_hash,
4005                                                                      hash_base=>$hash,
4006                                                                      hash_parent_base=>$hash_parent,
4007                                                                      file_name=>$diff->{'to_file'},
4008                                                                      file_parent=>$from_path)},
4009                                                       "diff" . ($i+1)) .
4010                                               " | </td>\n";
4011                                 }
4012                         }
4013
4014                         print "<td class=\"link\">";
4015                         if ($not_deleted) {
4016                                 print $cgi->a({-href => href(action=>"blob",
4017                                                              hash=>$diff->{'to_id'},
4018                                                              file_name=>$diff->{'to_file'},
4019                                                              hash_base=>$hash)},
4020                                               "blob");
4021                                 print " | " if ($has_history);
4022                         }
4023                         if ($has_history) {
4024                                 print $cgi->a({-href => href(action=>"history",
4025                                                              file_name=>$diff->{'to_file'},
4026                                                              hash_base=>$hash)},
4027                                               "history");
4028                         }
4029                         print "</td>\n";
4030
4031                         print "</tr>\n";
4032                         next; # instead of 'else' clause, to avoid extra indent
4033                 }
4034                 # else ordinary diff
4035
4036                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4037                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4038                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4039                         $to_mode_oct = oct $diff->{'to_mode'};
4040                         if (S_ISREG($to_mode_oct)) { # only for regular file
4041                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4042                         }
4043                         $to_file_type = file_type($diff->{'to_mode'});
4044                 }
4045                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4046                         $from_mode_oct = oct $diff->{'from_mode'};
4047                         if (S_ISREG($to_mode_oct)) { # only for regular file
4048                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4049                         }
4050                         $from_file_type = file_type($diff->{'from_mode'});
4051                 }
4052
4053                 if ($diff->{'status'} eq "A") { # created
4054                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4055                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4056                         $mode_chng   .= "]</span>";
4057                         print "<td>";
4058                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4059                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4060                                       -class => "list"}, esc_path($diff->{'file'}));
4061                         print "</td>\n";
4062                         print "<td>$mode_chng</td>\n";
4063                         print "<td class=\"link\">";
4064                         if ($action eq 'commitdiff') {
4065                                 # link to patch
4066                                 $patchno++;
4067                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4068                                 print " | ";
4069                         }
4070                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4071                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4072                                       "blob");
4073                         print "</td>\n";
4074
4075                 } elsif ($diff->{'status'} eq "D") { # deleted
4076                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4077                         print "<td>";
4078                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4079                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4080                                        -class => "list"}, esc_path($diff->{'file'}));
4081                         print "</td>\n";
4082                         print "<td>$mode_chng</td>\n";
4083                         print "<td class=\"link\">";
4084                         if ($action eq 'commitdiff') {
4085                                 # link to patch
4086                                 $patchno++;
4087                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4088                                 print " | ";
4089                         }
4090                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4091                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4092                                       "blob") . " | ";
4093                         if ($have_blame) {
4094                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4095                                                              file_name=>$diff->{'file'})},
4096                                               "blame") . " | ";
4097                         }
4098                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4099                                                      file_name=>$diff->{'file'})},
4100                                       "history");
4101                         print "</td>\n";
4102
4103                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4104                         my $mode_chnge = "";
4105                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4106                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4107                                 if ($from_file_type ne $to_file_type) {
4108                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4109                                 }
4110                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4111                                         if ($from_mode_str && $to_mode_str) {
4112                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4113                                         } elsif ($to_mode_str) {
4114                                                 $mode_chnge .= " mode: $to_mode_str";
4115                                         }
4116                                 }
4117                                 $mode_chnge .= "]</span>\n";
4118                         }
4119                         print "<td>";
4120                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4121                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4122                                       -class => "list"}, esc_path($diff->{'file'}));
4123                         print "</td>\n";
4124                         print "<td>$mode_chnge</td>\n";
4125                         print "<td class=\"link\">";
4126                         if ($action eq 'commitdiff') {
4127                                 # link to patch
4128                                 $patchno++;
4129                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4130                                       " | ";
4131                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4132                                 # "commit" view and modified file (not onlu mode changed)
4133                                 print $cgi->a({-href => href(action=>"blobdiff",
4134                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4135                                                              hash_base=>$hash, hash_parent_base=>$parent,
4136                                                              file_name=>$diff->{'file'})},
4137                                               "diff") .
4138                                       " | ";
4139                         }
4140                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4141                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4142                                        "blob") . " | ";
4143                         if ($have_blame) {
4144                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4145                                                              file_name=>$diff->{'file'})},
4146                                               "blame") . " | ";
4147                         }
4148                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4149                                                      file_name=>$diff->{'file'})},
4150                                       "history");
4151                         print "</td>\n";
4152
4153                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4154                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4155                         my $nstatus = $status_name{$diff->{'status'}};
4156                         my $mode_chng = "";
4157                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4158                                 # mode also for directories, so we cannot use $to_mode_str
4159                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4160                         }
4161                         print "<td>" .
4162                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4163                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4164                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4165                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4166                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4167                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4168                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4169                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4170                               "<td class=\"link\">";
4171                         if ($action eq 'commitdiff') {
4172                                 # link to patch
4173                                 $patchno++;
4174                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4175                                       " | ";
4176                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4177                                 # "commit" view and modified file (not only pure rename or copy)
4178                                 print $cgi->a({-href => href(action=>"blobdiff",
4179                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4180                                                              hash_base=>$hash, hash_parent_base=>$parent,
4181                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4182                                               "diff") .
4183                                       " | ";
4184                         }
4185                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4186                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4187                                       "blob") . " | ";
4188                         if ($have_blame) {
4189                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4190                                                              file_name=>$diff->{'to_file'})},
4191                                               "blame") . " | ";
4192                         }
4193                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4194                                                     file_name=>$diff->{'to_file'})},
4195                                       "history");
4196                         print "</td>\n";
4197
4198                 } # we should not encounter Unmerged (U) or Unknown (X) status
4199                 print "</tr>\n";
4200         }
4201         print "</tbody>" if $has_header;
4202         print "</table>\n";
4203 }
4204
4205 sub git_patchset_body {
4206         my ($fd, $difftree, $hash, @hash_parents) = @_;
4207         my ($hash_parent) = $hash_parents[0];
4208
4209         my $is_combined = (@hash_parents > 1);
4210         my $patch_idx = 0;
4211         my $patch_number = 0;
4212         my $patch_line;
4213         my $diffinfo;
4214         my $to_name;
4215         my (%from, %to);
4216
4217         print "<div class=\"patchset\">\n";
4218
4219         # skip to first patch
4220         while ($patch_line = <$fd>) {
4221                 chomp $patch_line;
4222
4223                 last if ($patch_line =~ m/^diff /);
4224         }
4225
4226  PATCH:
4227         while ($patch_line) {
4228
4229                 # parse "git diff" header line
4230                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4231                         # $1 is from_name, which we do not use
4232                         $to_name = unquote($2);
4233                         $to_name =~ s!^b/!!;
4234                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4235                         # $1 is 'cc' or 'combined', which we do not use
4236                         $to_name = unquote($2);
4237                 } else {
4238                         $to_name = undef;
4239                 }
4240
4241                 # check if current patch belong to current raw line
4242                 # and parse raw git-diff line if needed
4243                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4244                         # this is continuation of a split patch
4245                         print "<div class=\"patch cont\">\n";
4246                 } else {
4247                         # advance raw git-diff output if needed
4248                         $patch_idx++ if defined $diffinfo;
4249
4250                         # read and prepare patch information
4251                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4252
4253                         # compact combined diff output can have some patches skipped
4254                         # find which patch (using pathname of result) we are at now;
4255                         if ($is_combined) {
4256                                 while ($to_name ne $diffinfo->{'to_file'}) {
4257                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4258                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4259                                               "</div>\n";  # class="patch"
4260
4261                                         $patch_idx++;
4262                                         $patch_number++;
4263
4264                                         last if $patch_idx > $#$difftree;
4265                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4266                                 }
4267                         }
4268
4269                         # modifies %from, %to hashes
4270                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4271
4272                         # this is first patch for raw difftree line with $patch_idx index
4273                         # we index @$difftree array from 0, but number patches from 1
4274                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4275                 }
4276
4277                 # git diff header
4278                 #assert($patch_line =~ m/^diff /) if DEBUG;
4279                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4280                 $patch_number++;
4281                 # print "git diff" header
4282                 print format_git_diff_header_line($patch_line, $diffinfo,
4283                                                   \%from, \%to);
4284
4285                 # print extended diff header
4286                 print "<div class=\"diff extended_header\">\n";
4287         EXTENDED_HEADER:
4288                 while ($patch_line = <$fd>) {
4289                         chomp $patch_line;
4290
4291                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4292
4293                         print format_extended_diff_header_line($patch_line, $diffinfo,
4294                                                                \%from, \%to);
4295                 }
4296                 print "</div>\n"; # class="diff extended_header"
4297
4298                 # from-file/to-file diff header
4299                 if (! $patch_line) {
4300                         print "</div>\n"; # class="patch"
4301                         last PATCH;
4302                 }
4303                 next PATCH if ($patch_line =~ m/^diff /);
4304                 #assert($patch_line =~ m/^---/) if DEBUG;
4305
4306                 my $last_patch_line = $patch_line;
4307                 $patch_line = <$fd>;
4308                 chomp $patch_line;
4309                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4310
4311                 print format_diff_from_to_header($last_patch_line, $patch_line,
4312                                                  $diffinfo, \%from, \%to,
4313                                                  @hash_parents);
4314
4315                 # the patch itself
4316         LINE:
4317                 while ($patch_line = <$fd>) {
4318                         chomp $patch_line;
4319
4320                         next PATCH if ($patch_line =~ m/^diff /);
4321
4322                         print format_diff_line($patch_line, \%from, \%to);
4323                 }
4324
4325         } continue {
4326                 print "</div>\n"; # class="patch"
4327         }
4328
4329         # for compact combined (--cc) format, with chunk and patch simpliciaction
4330         # patchset might be empty, but there might be unprocessed raw lines
4331         for (++$patch_idx if $patch_number > 0;
4332              $patch_idx < @$difftree;
4333              ++$patch_idx) {
4334                 # read and prepare patch information
4335                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4336
4337                 # generate anchor for "patch" links in difftree / whatchanged part
4338                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4339                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4340                       "</div>\n";  # class="patch"
4341
4342                 $patch_number++;
4343         }
4344
4345         if ($patch_number == 0) {
4346                 if (@hash_parents > 1) {
4347                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4348                 } else {
4349                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4350                 }
4351         }
4352
4353         print "</div>\n"; # class="patchset"
4354 }
4355
4356 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4357
4358 # fills project list info (age, description, owner, forks) for each
4359 # project in the list, removing invalid projects from returned list
4360 # NOTE: modifies $projlist, but does not remove entries from it
4361 sub fill_project_list_info {
4362         my ($projlist, $check_forks) = @_;
4363         my @projects;
4364
4365         my $show_ctags = gitweb_check_feature('ctags');
4366  PROJECT:
4367         foreach my $pr (@$projlist) {
4368                 my (@activity) = git_get_last_activity($pr->{'path'});
4369                 unless (@activity) {
4370                         next PROJECT;
4371                 }
4372                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4373                 if (!defined $pr->{'descr'}) {
4374                         my $descr = git_get_project_description($pr->{'path'}) || "";
4375                         $descr = to_utf8($descr);
4376                         $pr->{'descr_long'} = $descr;
4377                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4378                 }
4379                 if (!defined $pr->{'owner'}) {
4380                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4381                 }
4382                 if ($check_forks) {
4383                         my $pname = $pr->{'path'};
4384                         if (($pname =~ s/\.git$//) &&
4385                             ($pname !~ /\/$/) &&
4386                             (-d "$projectroot/$pname")) {
4387                                 $pr->{'forks'} = "-d $projectroot/$pname";
4388                         } else {
4389                                 $pr->{'forks'} = 0;
4390                         }
4391                 }
4392                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4393                 push @projects, $pr;
4394         }
4395
4396         return @projects;
4397 }
4398
4399 # print 'sort by' <th> element, generating 'sort by $name' replay link
4400 # if that order is not selected
4401 sub print_sort_th {
4402         print format_sort_th(@_);
4403 }
4404
4405 sub format_sort_th {
4406         my ($name, $order, $header) = @_;
4407         my $sort_th = "";
4408         $header ||= ucfirst($name);
4409
4410         if ($order eq $name) {
4411                 $sort_th .= "<th>$header</th>\n";
4412         } else {
4413                 $sort_th .= "<th>" .
4414                             $cgi->a({-href => href(-replay=>1, order=>$name),
4415                                      -class => "header"}, $header) .
4416                             "</th>\n";
4417         }
4418
4419         return $sort_th;
4420 }
4421
4422 sub git_project_list_body {
4423         # actually uses global variable $project
4424         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4425
4426         my $check_forks = gitweb_check_feature('forks');
4427         my @projects = fill_project_list_info($projlist, $check_forks);
4428
4429         $order ||= $default_projects_order;
4430         $from = 0 unless defined $from;
4431         $to = $#projects if (!defined $to || $#projects < $to);
4432
4433         my %order_info = (
4434                 project => { key => 'path', type => 'str' },
4435                 descr => { key => 'descr_long', type => 'str' },
4436                 owner => { key => 'owner', type => 'str' },
4437                 age => { key => 'age', type => 'num' }
4438         );
4439         my $oi = $order_info{$order};
4440         if ($oi->{'type'} eq 'str') {
4441                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4442         } else {
4443                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4444         }
4445
4446         my $show_ctags = gitweb_check_feature('ctags');
4447         if ($show_ctags) {
4448                 my %ctags;
4449                 foreach my $p (@projects) {
4450                         foreach my $ct (keys %{$p->{'ctags'}}) {
4451                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4452                         }
4453                 }
4454                 my $cloud = git_populate_project_tagcloud(\%ctags);
4455                 print git_show_project_tagcloud($cloud, 64);
4456         }
4457
4458         print "<table class=\"project_list\">\n";
4459         unless ($no_header) {
4460                 print "<tr>\n";
4461                 if ($check_forks) {
4462                         print "<th></th>\n";
4463                 }
4464                 print_sort_th('project', $order, 'Project');
4465                 print_sort_th('descr', $order, 'Description');
4466                 print_sort_th('owner', $order, 'Owner');
4467                 print_sort_th('age', $order, 'Last Change');
4468                 print "<th></th>\n" . # for links
4469                       "</tr>\n";
4470         }
4471         my $alternate = 1;
4472         my $tagfilter = $cgi->param('by_tag');
4473         for (my $i = $from; $i <= $to; $i++) {
4474                 my $pr = $projects[$i];
4475
4476                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4477                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4478                         and not $pr->{'descr_long'} =~ /$searchtext/;
4479                 # Weed out forks or non-matching entries of search
4480                 if ($check_forks) {
4481                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4482                         $forkbase="^$forkbase" if $forkbase;
4483                         next if not $searchtext and not $tagfilter and $show_ctags
4484                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4485                 }
4486
4487                 if ($alternate) {
4488                         print "<tr class=\"dark\">\n";
4489                 } else {
4490                         print "<tr class=\"light\">\n";
4491                 }
4492                 $alternate ^= 1;
4493                 if ($check_forks) {
4494                         print "<td>";
4495                         if ($pr->{'forks'}) {
4496                                 print "<!-- $pr->{'forks'} -->\n";
4497                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4498                         }
4499                         print "</td>\n";
4500                 }
4501                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4502                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4503                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4504                                         -class => "list", -title => $pr->{'descr_long'}},
4505                                         esc_html($pr->{'descr'})) . "</td>\n" .
4506                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4507                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4508                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4509                       "<td class=\"link\">" .
4510                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4511                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4512                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4513                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4514                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4515                       "</td>\n" .
4516                       "</tr>\n";
4517         }
4518         if (defined $extra) {
4519                 print "<tr>\n";
4520                 if ($check_forks) {
4521                         print "<td></td>\n";
4522                 }
4523                 print "<td colspan=\"5\">$extra</td>\n" .
4524                       "</tr>\n";
4525         }
4526         print "</table>\n";
4527 }
4528
4529 sub git_log_body {
4530         # uses global variable $project
4531         my ($commitlist, $from, $to, $refs, $extra) = @_;
4532
4533         $from = 0 unless defined $from;
4534         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4535
4536         for (my $i = 0; $i <= $to; $i++) {
4537                 my %co = %{$commitlist->[$i]};
4538                 next if !%co;
4539                 my $commit = $co{'id'};
4540                 my $ref = format_ref_marker($refs, $commit);
4541                 my %ad = parse_date($co{'author_epoch'});
4542                 git_print_header_div('commit',
4543                                "<span class=\"age\">$co{'age_string'}</span>" .
4544                                esc_html($co{'title'}) . $ref,
4545                                $commit);
4546                 print "<div class=\"title_text\">\n" .
4547                       "<div class=\"log_link\">\n" .
4548                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4549                       " | " .
4550                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4551                       " | " .
4552                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4553                       "<br/>\n" .
4554                       "</div>\n";
4555                       git_print_authorship(\%co, -tag => 'span');
4556                       print "<br/>\n</div>\n";
4557
4558                 print "<div class=\"log_body\">\n";
4559                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4560                 print "</div>\n";
4561         }
4562         if ($extra) {
4563                 print "<div class=\"page_nav\">\n";
4564                 print "$extra\n";
4565                 print "</div>\n";
4566         }
4567 }
4568
4569 sub git_shortlog_body {
4570         # uses global variable $project
4571         my ($commitlist, $from, $to, $refs, $extra) = @_;
4572
4573         $from = 0 unless defined $from;
4574         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4575
4576         print "<table class=\"shortlog\">\n";
4577         my $alternate = 1;
4578         for (my $i = $from; $i <= $to; $i++) {
4579                 my %co = %{$commitlist->[$i]};
4580                 my $commit = $co{'id'};
4581                 my $ref = format_ref_marker($refs, $commit);
4582                 if ($alternate) {
4583                         print "<tr class=\"dark\">\n";
4584                 } else {
4585                         print "<tr class=\"light\">\n";
4586                 }
4587                 $alternate ^= 1;
4588                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4589                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4590                       format_author_html('td', \%co, 10) . "<td>";
4591                 print format_subject_html($co{'title'}, $co{'title_short'},
4592                                           href(action=>"commit", hash=>$commit), $ref);
4593                 print "</td>\n" .
4594                       "<td class=\"link\">" .
4595                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4596                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4597                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4598                 my $snapshot_links = format_snapshot_links($commit);
4599                 if (defined $snapshot_links) {
4600                         print " | " . $snapshot_links;
4601                 }
4602                 print "</td>\n" .
4603                       "</tr>\n";
4604         }
4605         if (defined $extra) {
4606                 print "<tr>\n" .
4607                       "<td colspan=\"4\">$extra</td>\n" .
4608                       "</tr>\n";
4609         }
4610         print "</table>\n";
4611 }
4612
4613 sub git_history_body {
4614         # Warning: assumes constant type (blob or tree) during history
4615         my ($commitlist, $from, $to, $refs, $extra,
4616             $file_name, $file_hash, $ftype) = @_;
4617
4618         $from = 0 unless defined $from;
4619         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4620
4621         print "<table class=\"history\">\n";
4622         my $alternate = 1;
4623         for (my $i = $from; $i <= $to; $i++) {
4624                 my %co = %{$commitlist->[$i]};
4625                 if (!%co) {
4626                         next;
4627                 }
4628                 my $commit = $co{'id'};
4629
4630                 my $ref = format_ref_marker($refs, $commit);
4631
4632                 if ($alternate) {
4633                         print "<tr class=\"dark\">\n";
4634                 } else {
4635                         print "<tr class=\"light\">\n";
4636                 }
4637                 $alternate ^= 1;
4638                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4639         # shortlog:   format_author_html('td', \%co, 10)
4640                       format_author_html('td', \%co, 15, 3) . "<td>";
4641                 # originally git_history used chop_str($co{'title'}, 50)
4642                 print format_subject_html($co{'title'}, $co{'title_short'},
4643                                           href(action=>"commit", hash=>$commit), $ref);
4644                 print "</td>\n" .
4645                       "<td class=\"link\">" .
4646                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4647                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4648
4649                 if ($ftype eq 'blob') {
4650                         my $blob_current = $file_hash;
4651                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4652                         if (defined $blob_current && defined $blob_parent &&
4653                                         $blob_current ne $blob_parent) {
4654                                 print " | " .
4655                                         $cgi->a({-href => href(action=>"blobdiff",
4656                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4657                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4658                                                                file_name=>$file_name)},
4659                                                 "diff to current");
4660                         }
4661                 }
4662                 print "</td>\n" .
4663                       "</tr>\n";
4664         }
4665         if (defined $extra) {
4666                 print "<tr>\n" .
4667                       "<td colspan=\"4\">$extra</td>\n" .
4668                       "</tr>\n";
4669         }
4670         print "</table>\n";
4671 }
4672
4673 sub git_tags_body {
4674         # uses global variable $project
4675         my ($taglist, $from, $to, $extra) = @_;
4676         $from = 0 unless defined $from;
4677         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4678
4679         print "<table class=\"tags\">\n";
4680         my $alternate = 1;
4681         for (my $i = $from; $i <= $to; $i++) {
4682                 my $entry = $taglist->[$i];
4683                 my %tag = %$entry;
4684                 my $comment = $tag{'subject'};
4685                 my $comment_short;
4686                 if (defined $comment) {
4687                         $comment_short = chop_str($comment, 30, 5);
4688                 }
4689                 if ($alternate) {
4690                         print "<tr class=\"dark\">\n";
4691                 } else {
4692                         print "<tr class=\"light\">\n";
4693                 }
4694                 $alternate ^= 1;
4695                 if (defined $tag{'age'}) {
4696                         print "<td><i>$tag{'age'}</i></td>\n";
4697                 } else {
4698                         print "<td></td>\n";
4699                 }
4700                 print "<td>" .
4701                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4702                                -class => "list name"}, esc_html($tag{'name'})) .
4703                       "</td>\n" .
4704                       "<td>";
4705                 if (defined $comment) {
4706                         print format_subject_html($comment, $comment_short,
4707                                                   href(action=>"tag", hash=>$tag{'id'}));
4708                 }
4709                 print "</td>\n" .
4710                       "<td class=\"selflink\">";
4711                 if ($tag{'type'} eq "tag") {
4712                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4713                 } else {
4714                         print "&nbsp;";
4715                 }
4716                 print "</td>\n" .
4717                       "<td class=\"link\">" . " | " .
4718                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4719                 if ($tag{'reftype'} eq "commit") {
4720                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4721                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4722                 } elsif ($tag{'reftype'} eq "blob") {
4723                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4724                 }
4725                 print "</td>\n" .
4726                       "</tr>";
4727         }
4728         if (defined $extra) {
4729                 print "<tr>\n" .
4730                       "<td colspan=\"5\">$extra</td>\n" .
4731                       "</tr>\n";
4732         }
4733         print "</table>\n";
4734 }
4735
4736 sub git_heads_body {
4737         # uses global variable $project
4738         my ($headlist, $head, $from, $to, $extra) = @_;
4739         $from = 0 unless defined $from;
4740         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4741
4742         print "<table class=\"heads\">\n";
4743         my $alternate = 1;
4744         for (my $i = $from; $i <= $to; $i++) {
4745                 my $entry = $headlist->[$i];
4746                 my %ref = %$entry;
4747                 my $curr = $ref{'id'} eq $head;
4748                 if ($alternate) {
4749                         print "<tr class=\"dark\">\n";
4750                 } else {
4751                         print "<tr class=\"light\">\n";
4752                 }
4753                 $alternate ^= 1;
4754                 print "<td><i>$ref{'age'}</i></td>\n" .
4755                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4756                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4757                                -class => "list name"},esc_html($ref{'name'})) .
4758                       "</td>\n" .
4759                       "<td class=\"link\">" .
4760                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4761                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4762                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4763                       "</td>\n" .
4764                       "</tr>";
4765         }
4766         if (defined $extra) {
4767                 print "<tr>\n" .
4768                       "<td colspan=\"3\">$extra</td>\n" .
4769                       "</tr>\n";
4770         }
4771         print "</table>\n";
4772 }
4773
4774 sub git_search_grep_body {
4775         my ($commitlist, $from, $to, $extra) = @_;
4776         $from = 0 unless defined $from;
4777         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4778
4779         print "<table class=\"commit_search\">\n";
4780         my $alternate = 1;
4781         for (my $i = $from; $i <= $to; $i++) {
4782                 my %co = %{$commitlist->[$i]};
4783                 if (!%co) {
4784                         next;
4785                 }
4786                 my $commit = $co{'id'};
4787                 if ($alternate) {
4788                         print "<tr class=\"dark\">\n";
4789                 } else {
4790                         print "<tr class=\"light\">\n";
4791                 }
4792                 $alternate ^= 1;
4793                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4794                       format_author_html('td', \%co, 15, 5) .
4795                       "<td>" .
4796                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4797                                -class => "list subject"},
4798                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4799                 my $comment = $co{'comment'};
4800                 foreach my $line (@$comment) {
4801                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4802                                 my ($lead, $match, $trail) = ($1, $2, $3);
4803                                 $match = chop_str($match, 70, 5, 'center');
4804                                 my $contextlen = int((80 - length($match))/2);
4805                                 $contextlen = 30 if ($contextlen > 30);
4806                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4807                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4808
4809                                 $lead  = esc_html($lead);
4810                                 $match = esc_html($match);
4811                                 $trail = esc_html($trail);
4812
4813                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4814                         }
4815                 }
4816                 print "</td>\n" .
4817                       "<td class=\"link\">" .
4818                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4819                       " | " .
4820                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4821                       " | " .
4822                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4823                 print "</td>\n" .
4824                       "</tr>\n";
4825         }
4826         if (defined $extra) {
4827                 print "<tr>\n" .
4828                       "<td colspan=\"3\">$extra</td>\n" .
4829                       "</tr>\n";
4830         }
4831         print "</table>\n";
4832 }
4833
4834 ## ======================================================================
4835 ## ======================================================================
4836 ## actions
4837
4838 sub git_project_list {
4839         my $order = $input_params{'order'};
4840         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4841                 die_error(400, "Unknown order parameter");
4842         }
4843
4844         my @list = git_get_projects_list();
4845         if (!@list) {
4846                 die_error(404, "No projects found");
4847         }
4848
4849         git_header_html();
4850         if (defined $home_text && -f $home_text) {
4851                 print "<div class=\"index_include\">\n";
4852                 insert_file($home_text);
4853                 print "</div>\n";
4854         }
4855         print $cgi->startform(-method => "get") .
4856               "<p class=\"projsearch\">Search:\n" .
4857               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4858               "</p>" .
4859               $cgi->end_form() . "\n";
4860         git_project_list_body(\@list, $order);
4861         git_footer_html();
4862 }
4863
4864 sub git_forks {
4865         my $order = $input_params{'order'};
4866         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4867                 die_error(400, "Unknown order parameter");
4868         }
4869
4870         my @list = git_get_projects_list($project);
4871         if (!@list) {
4872                 die_error(404, "No forks found");
4873         }
4874
4875         git_header_html();
4876         git_print_page_nav('','');
4877         git_print_header_div('summary', "$project forks");
4878         git_project_list_body(\@list, $order);
4879         git_footer_html();
4880 }
4881
4882 sub git_project_index {
4883         my @projects = git_get_projects_list($project);
4884
4885         print $cgi->header(
4886                 -type => 'text/plain',
4887                 -charset => 'utf-8',
4888                 -content_disposition => 'inline; filename="index.aux"');
4889
4890         foreach my $pr (@projects) {
4891                 if (!exists $pr->{'owner'}) {
4892                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4893                 }
4894
4895                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4896                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4897                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4898                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4899                 $path  =~ s/ /\+/g;
4900                 $owner =~ s/ /\+/g;
4901
4902                 print "$path $owner\n";
4903         }
4904 }
4905
4906 sub git_summary {
4907         my $descr = git_get_project_description($project) || "none";
4908         my %co = parse_commit("HEAD");
4909         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4910         my $head = $co{'id'};
4911
4912         my $owner = git_get_project_owner($project);
4913
4914         my $refs = git_get_references();
4915         # These get_*_list functions return one more to allow us to see if
4916         # there are more ...
4917         my @taglist  = git_get_tags_list(16);
4918         my @headlist = git_get_heads_list(16);
4919         my @forklist;
4920         my $check_forks = gitweb_check_feature('forks');
4921
4922         if ($check_forks) {
4923                 @forklist = git_get_projects_list($project);
4924         }
4925
4926         git_header_html();
4927         git_print_page_nav('summary','', $head);
4928
4929         print "<div class=\"title\">&nbsp;</div>\n";
4930         print "<table class=\"projects_list\">\n" .
4931               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4932               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4933         if (defined $cd{'rfc2822'}) {
4934                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4935         }
4936
4937         # use per project git URL list in $projectroot/$project/cloneurl
4938         # or make project git URL from git base URL and project name
4939         my $url_tag = "URL";
4940         my @url_list = git_get_project_url_list($project);
4941         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4942         foreach my $git_url (@url_list) {
4943                 next unless $git_url;
4944                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4945                 $url_tag = "";
4946         }
4947
4948         # Tag cloud
4949         my $show_ctags = gitweb_check_feature('ctags');
4950         if ($show_ctags) {
4951                 my $ctags = git_get_project_ctags($project);
4952                 my $cloud = git_populate_project_tagcloud($ctags);
4953                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4954                 print "</td>\n<td>" unless %$ctags;
4955                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4956                 print "</td>\n<td>" if %$ctags;
4957                 print git_show_project_tagcloud($cloud, 48);
4958                 print "</td></tr>";
4959         }
4960
4961         print "</table>\n";
4962
4963         # If XSS prevention is on, we don't include README.html.
4964         # TODO: Allow a readme in some safe format.
4965         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4966                 print "<div class=\"title\">readme</div>\n" .
4967                       "<div class=\"readme\">\n";
4968                 insert_file("$projectroot/$project/README.html");
4969                 print "\n</div>\n"; # class="readme"
4970         }
4971
4972         # we need to request one more than 16 (0..15) to check if
4973         # those 16 are all
4974         my @commitlist = $head ? parse_commits($head, 17) : ();
4975         if (@commitlist) {
4976                 git_print_header_div('shortlog');
4977                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4978                                   $#commitlist <=  15 ? undef :
4979                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4980         }
4981
4982         if (@taglist) {
4983                 git_print_header_div('tags');
4984                 git_tags_body(\@taglist, 0, 15,
4985                               $#taglist <=  15 ? undef :
4986                               $cgi->a({-href => href(action=>"tags")}, "..."));
4987         }
4988
4989         if (@headlist) {
4990                 git_print_header_div('heads');
4991                 git_heads_body(\@headlist, $head, 0, 15,
4992                                $#headlist <= 15 ? undef :
4993                                $cgi->a({-href => href(action=>"heads")}, "..."));
4994         }
4995
4996         if (@forklist) {
4997                 git_print_header_div('forks');
4998                 git_project_list_body(\@forklist, 'age', 0, 15,
4999                                       $#forklist <= 15 ? undef :
5000                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5001                                       'no_header');
5002         }
5003
5004         git_footer_html();
5005 }
5006
5007 sub git_tag {
5008         my $head = git_get_head_hash($project);
5009         git_header_html();
5010         git_print_page_nav('','', $head,undef,$head);
5011         my %tag = parse_tag($hash);
5012
5013         if (! %tag) {
5014                 die_error(404, "Unknown tag object");
5015         }
5016
5017         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5018         print "<div class=\"title_text\">\n" .
5019               "<table class=\"object_header\">\n" .
5020               "<tr>\n" .
5021               "<td>object</td>\n" .
5022               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5023                                $tag{'object'}) . "</td>\n" .
5024               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5025                                               $tag{'type'}) . "</td>\n" .
5026               "</tr>\n";
5027         if (defined($tag{'author'})) {
5028                 git_print_authorship_rows(\%tag, 'author');
5029         }
5030         print "</table>\n\n" .
5031               "</div>\n";
5032         print "<div class=\"page_body\">";
5033         my $comment = $tag{'comment'};
5034         foreach my $line (@$comment) {
5035                 chomp $line;
5036                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5037         }
5038         print "</div>\n";
5039         git_footer_html();
5040 }
5041
5042 sub git_blame_common {
5043         my $format = shift || 'porcelain';
5044         if ($format eq 'porcelain' && $cgi->param('js')) {
5045                 $format = 'incremental';
5046                 $action = 'blame_incremental'; # for page title etc
5047         }
5048
5049         # permissions
5050         gitweb_check_feature('blame')
5051                 or die_error(403, "Blame view not allowed");
5052
5053         # error checking
5054         die_error(400, "No file name given") unless $file_name;
5055         $hash_base ||= git_get_head_hash($project);
5056         die_error(404, "Couldn't find base commit") unless $hash_base;
5057         my %co = parse_commit($hash_base)
5058                 or die_error(404, "Commit not found");
5059         my $ftype = "blob";
5060         if (!defined $hash) {
5061                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5062                         or die_error(404, "Error looking up file");
5063         } else {
5064                 $ftype = git_get_type($hash);
5065                 if ($ftype !~ "blob") {
5066                         die_error(400, "Object is not a blob");
5067                 }
5068         }
5069
5070         my $fd;
5071         if ($format eq 'incremental') {
5072                 # get file contents (as base)
5073                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5074                         or die_error(500, "Open git-cat-file failed");
5075         } elsif ($format eq 'data') {
5076                 # run git-blame --incremental
5077                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5078                         $hash_base, "--", $file_name
5079                         or die_error(500, "Open git-blame --incremental failed");
5080         } else {
5081                 # run git-blame --porcelain
5082                 open $fd, "-|", git_cmd(), "blame", '-p',
5083                         $hash_base, '--', $file_name
5084                         or die_error(500, "Open git-blame --porcelain failed");
5085         }
5086
5087         # incremental blame data returns early
5088         if ($format eq 'data') {
5089                 print $cgi->header(
5090                         -type=>"text/plain", -charset => "utf-8",
5091                         -status=> "200 OK");
5092                 local $| = 1; # output autoflush
5093                 print while <$fd>;
5094                 close $fd
5095                         or print "ERROR $!\n";
5096
5097                 print 'END';
5098                 if (defined $t0 && gitweb_check_feature('timed')) {
5099                         print ' '.
5100                               Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
5101                               ' '.$number_of_git_cmds;
5102                 }
5103                 print "\n";
5104
5105                 return;
5106         }
5107
5108         # page header
5109         git_header_html();
5110         my $formats_nav =
5111                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5112                         "blob") .
5113                 " | ";
5114         if ($format eq 'incremental') {
5115                 $formats_nav .=
5116                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5117                                 "blame") . " (non-incremental)";
5118         } else {
5119                 $formats_nav .=
5120                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5121                                 "blame") . " (incremental)";
5122         }
5123         $formats_nav .=
5124                 " | " .
5125                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5126                         "history") .
5127                 " | " .
5128                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5129                         "HEAD");
5130         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5131         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5132         git_print_page_path($file_name, $ftype, $hash_base);
5133
5134         # page body
5135         if ($format eq 'incremental') {
5136                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5137                       "This page requires JavaScript to run.\n Use ".
5138                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5139                               'this page').
5140                       " instead.\n".
5141                       "</b></center></div>\n</noscript>\n";
5142
5143                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5144         }
5145
5146         print qq!<div class="page_body">\n!;
5147         print qq!<div id="progress_info">... / ...</div>\n!
5148                 if ($format eq 'incremental');
5149         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5150               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5151               qq!<thead>\n!.
5152               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5153               qq!</thead>\n!.
5154               qq!<tbody>\n!;
5155
5156         my @rev_color = qw(light dark);
5157         my $num_colors = scalar(@rev_color);
5158         my $current_color = 0;
5159
5160         if ($format eq 'incremental') {
5161                 my $color_class = $rev_color[$current_color];
5162
5163                 #contents of a file
5164                 my $linenr = 0;
5165         LINE:
5166                 while (my $line = <$fd>) {
5167                         chomp $line;
5168                         $linenr++;
5169
5170                         print qq!<tr id="l$linenr" class="$color_class">!.
5171                               qq!<td class="sha1"><a href=""> </a></td>!.
5172                               qq!<td class="linenr">!.
5173                               qq!<a class="linenr" href="">$linenr</a></td>!;
5174                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5175                         print qq!</tr>\n!;
5176                 }
5177
5178         } else { # porcelain, i.e. ordinary blame
5179                 my %metainfo = (); # saves information about commits
5180
5181                 # blame data
5182         LINE:
5183                 while (my $line = <$fd>) {
5184                         chomp $line;
5185                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5186                         # no <lines in group> for subsequent lines in group of lines
5187                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5188                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5189                         if (!exists $metainfo{$full_rev}) {
5190                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5191                         }
5192                         my $meta = $metainfo{$full_rev};
5193                         my $data;
5194                         while ($data = <$fd>) {
5195                                 chomp $data;
5196                                 last if ($data =~ s/^\t//); # contents of line
5197                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5198                                         $meta->{$1} = $2 unless exists $meta->{$1};
5199                                 }
5200                                 if ($data =~ /^previous /) {
5201                                         $meta->{'nprevious'}++;
5202                                 }
5203                         }
5204                         my $short_rev = substr($full_rev, 0, 8);
5205                         my $author = $meta->{'author'};
5206                         my %date =
5207                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5208                         my $date = $date{'iso-tz'};
5209                         if ($group_size) {
5210                                 $current_color = ($current_color + 1) % $num_colors;
5211                         }
5212                         my $tr_class = $rev_color[$current_color];
5213                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5214                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5215                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5216                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5217                         if ($group_size) {
5218                                 print "<td class=\"sha1\"";
5219                                 print " title=\"". esc_html($author) . ", $date\"";
5220                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5221                                 print ">";
5222                                 print $cgi->a({-href => href(action=>"commit",
5223                                                              hash=>$full_rev,
5224                                                              file_name=>$file_name)},
5225                                               esc_html($short_rev));
5226                                 if ($group_size >= 2) {
5227                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5228                                         if (@author_initials) {
5229                                                 print "<br />" .
5230                                                       esc_html(join('', @author_initials));
5231                                                 #           or join('.', ...)
5232                                         }
5233                                 }
5234                                 print "</td>\n";
5235                         }
5236                         # 'previous' <sha1 of parent commit> <filename at commit>
5237                         if (exists $meta->{'previous'} &&
5238                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5239                                 $meta->{'parent'} = $1;
5240                                 $meta->{'file_parent'} = unquote($2);
5241                         }
5242                         my $linenr_commit =
5243                                 exists($meta->{'parent'}) ?
5244                                 $meta->{'parent'} : $full_rev;
5245                         my $linenr_filename =
5246                                 exists($meta->{'file_parent'}) ?
5247                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5248                         my $blamed = href(action => 'blame',
5249                                           file_name => $linenr_filename,
5250                                           hash_base => $linenr_commit);
5251                         print "<td class=\"linenr\">";
5252                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5253                                         -class => "linenr" },
5254                                       esc_html($lineno));
5255                         print "</td>";
5256                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5257                         print "</tr>\n";
5258                 } # end while
5259
5260         }
5261
5262         # footer
5263         print "</tbody>\n".
5264               "</table>\n"; # class="blame"
5265         print "</div>\n";   # class="blame_body"
5266         close $fd
5267                 or print "Reading blob failed\n";
5268
5269         git_footer_html();
5270 }
5271
5272 sub git_blame {
5273         git_blame_common();
5274 }
5275
5276 sub git_blame_incremental {
5277         git_blame_common('incremental');
5278 }
5279
5280 sub git_blame_data {
5281         git_blame_common('data');
5282 }
5283
5284 sub git_tags {
5285         my $head = git_get_head_hash($project);
5286         git_header_html();
5287         git_print_page_nav('','', $head,undef,$head);
5288         git_print_header_div('summary', $project);
5289
5290         my @tagslist = git_get_tags_list();
5291         if (@tagslist) {
5292                 git_tags_body(\@tagslist);
5293         }
5294         git_footer_html();
5295 }
5296
5297 sub git_heads {
5298         my $head = git_get_head_hash($project);
5299         git_header_html();
5300         git_print_page_nav('','', $head,undef,$head);
5301         git_print_header_div('summary', $project);
5302
5303         my @headslist = git_get_heads_list();
5304         if (@headslist) {
5305                 git_heads_body(\@headslist, $head);
5306         }
5307         git_footer_html();
5308 }
5309
5310 sub git_blob_plain {
5311         my $type = shift;
5312         my $expires;
5313
5314         if (!defined $hash) {
5315                 if (defined $file_name) {
5316                         my $base = $hash_base || git_get_head_hash($project);
5317                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5318                                 or die_error(404, "Cannot find file");
5319                 } else {
5320                         die_error(400, "No file name defined");
5321                 }
5322         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5323                 # blobs defined by non-textual hash id's can be cached
5324                 $expires = "+1d";
5325         }
5326
5327         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5328                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5329
5330         # content-type (can include charset)
5331         $type = blob_contenttype($fd, $file_name, $type);
5332
5333         # "save as" filename, even when no $file_name is given
5334         my $save_as = "$hash";
5335         if (defined $file_name) {
5336                 $save_as = $file_name;
5337         } elsif ($type =~ m/^text\//) {
5338                 $save_as .= '.txt';
5339         }
5340
5341         # With XSS prevention on, blobs of all types except a few known safe
5342         # ones are served with "Content-Disposition: attachment" to make sure
5343         # they don't run in our security domain.  For certain image types,
5344         # blob view writes an <img> tag referring to blob_plain view, and we
5345         # want to be sure not to break that by serving the image as an
5346         # attachment (though Firefox 3 doesn't seem to care).
5347         my $sandbox = $prevent_xss &&
5348                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5349
5350         print $cgi->header(
5351                 -type => $type,
5352                 -expires => $expires,
5353                 -content_disposition =>
5354                         ($sandbox ? 'attachment' : 'inline')
5355                         . '; filename="' . $save_as . '"');
5356         local $/ = undef;
5357         binmode STDOUT, ':raw';
5358         print <$fd>;
5359         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5360         close $fd;
5361 }
5362
5363 sub git_blob {
5364         my $expires;
5365
5366         if (!defined $hash) {
5367                 if (defined $file_name) {
5368                         my $base = $hash_base || git_get_head_hash($project);
5369                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5370                                 or die_error(404, "Cannot find file");
5371                 } else {
5372                         die_error(400, "No file name defined");
5373                 }
5374         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5375                 # blobs defined by non-textual hash id's can be cached
5376                 $expires = "+1d";
5377         }
5378
5379         my $have_blame = gitweb_check_feature('blame');
5380         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5381                 or die_error(500, "Couldn't cat $file_name, $hash");
5382         my $mimetype = blob_mimetype($fd, $file_name);
5383         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5384                 close $fd;
5385                 return git_blob_plain($mimetype);
5386         }
5387         # we can have blame only for text/* mimetype
5388         $have_blame &&= ($mimetype =~ m!^text/!);
5389
5390         git_header_html(undef, $expires);
5391         my $formats_nav = '';
5392         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5393                 if (defined $file_name) {
5394                         if ($have_blame) {
5395                                 $formats_nav .=
5396                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5397                                                 "blame") .
5398                                         " | ";
5399                         }
5400                         $formats_nav .=
5401                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5402                                         "history") .
5403                                 " | " .
5404                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5405                                         "raw") .
5406                                 " | " .
5407                                 $cgi->a({-href => href(action=>"blob",
5408                                                        hash_base=>"HEAD", file_name=>$file_name)},
5409                                         "HEAD");
5410                 } else {
5411                         $formats_nav .=
5412                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5413                                         "raw");
5414                 }
5415                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5416                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5417         } else {
5418                 print "<div class=\"page_nav\">\n" .
5419                       "<br/><br/></div>\n" .
5420                       "<div class=\"title\">$hash</div>\n";
5421         }
5422         git_print_page_path($file_name, "blob", $hash_base);
5423         print "<div class=\"page_body\">\n";
5424         if ($mimetype =~ m!^image/!) {
5425                 print qq!<img type="$mimetype"!;
5426                 if ($file_name) {
5427                         print qq! alt="$file_name" title="$file_name"!;
5428                 }
5429                 print qq! src="! .
5430                       href(action=>"blob_plain", hash=>$hash,
5431                            hash_base=>$hash_base, file_name=>$file_name) .
5432                       qq!" />\n!;
5433         } else {
5434                 my $nr;
5435                 while (my $line = <$fd>) {
5436                         chomp $line;
5437                         $nr++;
5438                         $line = untabify($line);
5439                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"" . href(-replay => 1)
5440                                 . "#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
5441                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
5442                 }
5443         }
5444         close $fd
5445                 or print "Reading blob failed.\n";
5446         print "</div>";
5447         git_footer_html();
5448 }
5449
5450 sub git_tree {
5451         if (!defined $hash_base) {
5452                 $hash_base = "HEAD";
5453         }
5454         if (!defined $hash) {
5455                 if (defined $file_name) {
5456                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5457                 } else {
5458                         $hash = $hash_base;
5459                 }
5460         }
5461         die_error(404, "No such tree") unless defined($hash);
5462
5463         my $show_sizes = gitweb_check_feature('show-sizes');
5464         my $have_blame = gitweb_check_feature('blame');
5465
5466         my @entries = ();
5467         {
5468                 local $/ = "\0";
5469                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5470                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5471                         or die_error(500, "Open git-ls-tree failed");
5472                 @entries = map { chomp; $_ } <$fd>;
5473                 close $fd
5474                         or die_error(404, "Reading tree failed");
5475         }
5476
5477         my $refs = git_get_references();
5478         my $ref = format_ref_marker($refs, $hash_base);
5479         git_header_html();
5480         my $basedir = '';
5481         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5482                 my @views_nav = ();
5483                 if (defined $file_name) {
5484                         push @views_nav,
5485                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5486                                         "history"),
5487                                 $cgi->a({-href => href(action=>"tree",
5488                                                        hash_base=>"HEAD", file_name=>$file_name)},
5489                                         "HEAD"),
5490                 }
5491                 my $snapshot_links = format_snapshot_links($hash);
5492                 if (defined $snapshot_links) {
5493                         # FIXME: Should be available when we have no hash base as well.
5494                         push @views_nav, $snapshot_links;
5495                 }
5496                 git_print_page_nav('tree','', $hash_base, undef, undef,
5497                                    join(' | ', @views_nav));
5498                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5499         } else {
5500                 undef $hash_base;
5501                 print "<div class=\"page_nav\">\n";
5502                 print "<br/><br/></div>\n";
5503                 print "<div class=\"title\">$hash</div>\n";
5504         }
5505         if (defined $file_name) {
5506                 $basedir = $file_name;
5507                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5508                         $basedir .= '/';
5509                 }
5510                 git_print_page_path($file_name, 'tree', $hash_base);
5511         }
5512         print "<div class=\"page_body\">\n";
5513         print "<table class=\"tree\">\n";
5514         my $alternate = 1;
5515         # '..' (top directory) link if possible
5516         if (defined $hash_base &&
5517             defined $file_name && $file_name =~ m![^/]+$!) {
5518                 if ($alternate) {
5519                         print "<tr class=\"dark\">\n";
5520                 } else {
5521                         print "<tr class=\"light\">\n";
5522                 }
5523                 $alternate ^= 1;
5524
5525                 my $up = $file_name;
5526                 $up =~ s!/?[^/]+$!!;
5527                 undef $up unless $up;
5528                 # based on git_print_tree_entry
5529                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5530                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5531                 print '<td class="list">';
5532                 print $cgi->a({-href => href(action=>"tree",
5533                                              hash_base=>$hash_base,
5534                                              file_name=>$up)},
5535                               "..");
5536                 print "</td>\n";
5537                 print "<td class=\"link\"></td>\n";
5538
5539                 print "</tr>\n";
5540         }
5541         foreach my $line (@entries) {
5542                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5543
5544                 if ($alternate) {
5545                         print "<tr class=\"dark\">\n";
5546                 } else {
5547                         print "<tr class=\"light\">\n";
5548                 }
5549                 $alternate ^= 1;
5550
5551                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5552
5553                 print "</tr>\n";
5554         }
5555         print "</table>\n" .
5556               "</div>";
5557         git_footer_html();
5558 }
5559
5560 sub snapshot_name {
5561         my ($project, $hash) = @_;
5562
5563         # path/to/project.git  -> project
5564         # path/to/project/.git -> project
5565         my $name = to_utf8($project);
5566         $name =~ s,([^/])/*\.git$,$1,;
5567         $name = basename($name);
5568         # sanitize name
5569         $name =~ s/[[:cntrl:]]/?/g;
5570
5571         my $ver = $hash;
5572         if ($hash =~ /^[0-9a-fA-F]+$/) {
5573                 # shorten SHA-1 hash
5574                 my $full_hash = git_get_full_hash($project, $hash);
5575                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
5576                         $ver = git_get_short_hash($project, $hash);
5577                 }
5578         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
5579                 # tags don't need shortened SHA-1 hash
5580                 $ver = $1;
5581         } else {
5582                 # branches and other need shortened SHA-1 hash
5583                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
5584                         $ver = $1;
5585                 }
5586                 $ver .= '-' . git_get_short_hash($project, $hash);
5587         }
5588         # in case of hierarchical branch names
5589         $ver =~ s!/!.!g;
5590
5591         # name = project-version_string
5592         $name = "$name-$ver";
5593
5594         return wantarray ? ($name, $name) : $name;
5595 }
5596
5597 sub git_snapshot {
5598         my $format = $input_params{'snapshot_format'};
5599         if (!@snapshot_fmts) {
5600                 die_error(403, "Snapshots not allowed");
5601         }
5602         # default to first supported snapshot format
5603         $format ||= $snapshot_fmts[0];
5604         if ($format !~ m/^[a-z0-9]+$/) {
5605                 die_error(400, "Invalid snapshot format parameter");
5606         } elsif (!exists($known_snapshot_formats{$format})) {
5607                 die_error(400, "Unknown snapshot format");
5608         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5609                 die_error(403, "Snapshot format not allowed");
5610         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5611                 die_error(403, "Unsupported snapshot format");
5612         }
5613
5614         my $type = git_get_type("$hash^{}");
5615         if (!$type) {
5616                 die_error(404, 'Object does not exist');
5617         }  elsif ($type eq 'blob') {
5618                 die_error(400, 'Object is not a tree-ish');
5619         }
5620
5621         my ($name, $prefix) = snapshot_name($project, $hash);
5622         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
5623         my $cmd = quote_command(
5624                 git_cmd(), 'archive',
5625                 "--format=$known_snapshot_formats{$format}{'format'}",
5626                 "--prefix=$prefix/", $hash);
5627         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5628                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5629         }
5630
5631         $filename =~ s/(["\\])/\\$1/g;
5632         print $cgi->header(
5633                 -type => $known_snapshot_formats{$format}{'type'},
5634                 -content_disposition => 'inline; filename="' . $filename . '"',
5635                 -status => '200 OK');
5636
5637         open my $fd, "-|", $cmd
5638                 or die_error(500, "Execute git-archive failed");
5639         binmode STDOUT, ':raw';
5640         print <$fd>;
5641         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5642         close $fd;
5643 }
5644
5645 sub git_log_generic {
5646         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
5647
5648         my $head = git_get_head_hash($project);
5649         if (!defined $base) {
5650                 $base = $head;
5651         }
5652         if (!defined $page) {
5653                 $page = 0;
5654         }
5655         my $refs = git_get_references();
5656
5657         my $commit_hash = $base;
5658         if (defined $parent) {
5659                 $commit_hash = "$parent..$base";
5660         }
5661         my @commitlist =
5662                 parse_commits($commit_hash, 101, (100 * $page),
5663                               defined $file_name ? ($file_name, "--full-history") : ());
5664
5665         my $ftype;
5666         if (!defined $file_hash && defined $file_name) {
5667                 # some commits could have deleted file in question,
5668                 # and not have it in tree, but one of them has to have it
5669                 for (my $i = 0; $i < @commitlist; $i++) {
5670                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5671                         last if defined $file_hash;
5672                 }
5673         }
5674         if (defined $file_hash) {
5675                 $ftype = git_get_type($file_hash);
5676         }
5677         if (defined $file_name && !defined $ftype) {
5678                 die_error(500, "Unknown type of object");
5679         }
5680         my %co;
5681         if (defined $file_name) {
5682                 %co = parse_commit($base)
5683                         or die_error(404, "Unknown commit object");
5684         }
5685
5686
5687         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
5688         my $next_link = '';
5689         if ($#commitlist >= 100) {
5690                 $next_link =
5691                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5692                                  -accesskey => "n", -title => "Alt-n"}, "next");
5693         }
5694         my $patch_max = gitweb_get_feature('patches');
5695         if ($patch_max && !defined $file_name) {
5696                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5697                         $paging_nav .= " &sdot; " .
5698                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5699                                         "patches");
5700                 }
5701         }
5702
5703         git_header_html();
5704         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
5705         if (defined $file_name) {
5706                 git_print_header_div('commit', esc_html($co{'title'}), $base);
5707         } else {
5708                 git_print_header_div('summary', $project)
5709         }
5710         git_print_page_path($file_name, $ftype, $hash_base)
5711                 if (defined $file_name);
5712
5713         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
5714                      $file_name, $file_hash, $ftype);
5715
5716         git_footer_html();
5717 }
5718
5719 sub git_log {
5720         git_log_generic('log', \&git_log_body,
5721                         $hash, $hash_parent);
5722 }
5723
5724 sub git_commit {
5725         $hash ||= $hash_base || "HEAD";
5726         my %co = parse_commit($hash)
5727             or die_error(404, "Unknown commit object");
5728
5729         my $parent  = $co{'parent'};
5730         my $parents = $co{'parents'}; # listref
5731
5732         # we need to prepare $formats_nav before any parameter munging
5733         my $formats_nav;
5734         if (!defined $parent) {
5735                 # --root commitdiff
5736                 $formats_nav .= '(initial)';
5737         } elsif (@$parents == 1) {
5738                 # single parent commit
5739                 $formats_nav .=
5740                         '(parent: ' .
5741                         $cgi->a({-href => href(action=>"commit",
5742                                                hash=>$parent)},
5743                                 esc_html(substr($parent, 0, 7))) .
5744                         ')';
5745         } else {
5746                 # merge commit
5747                 $formats_nav .=
5748                         '(merge: ' .
5749                         join(' ', map {
5750                                 $cgi->a({-href => href(action=>"commit",
5751                                                        hash=>$_)},
5752                                         esc_html(substr($_, 0, 7)));
5753                         } @$parents ) .
5754                         ')';
5755         }
5756         if (gitweb_check_feature('patches') && @$parents <= 1) {
5757                 $formats_nav .= " | " .
5758                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5759                                 "patch");
5760         }
5761
5762         if (!defined $parent) {
5763                 $parent = "--root";
5764         }
5765         my @difftree;
5766         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5767                 @diff_opts,
5768                 (@$parents <= 1 ? $parent : '-c'),
5769                 $hash, "--"
5770                 or die_error(500, "Open git-diff-tree failed");
5771         @difftree = map { chomp; $_ } <$fd>;
5772         close $fd or die_error(404, "Reading git-diff-tree failed");
5773
5774         # non-textual hash id's can be cached
5775         my $expires;
5776         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5777                 $expires = "+1d";
5778         }
5779         my $refs = git_get_references();
5780         my $ref = format_ref_marker($refs, $co{'id'});
5781
5782         git_header_html(undef, $expires);
5783         git_print_page_nav('commit', '',
5784                            $hash, $co{'tree'}, $hash,
5785                            $formats_nav);
5786
5787         if (defined $co{'parent'}) {
5788                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5789         } else {
5790                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5791         }
5792         print "<div class=\"title_text\">\n" .
5793               "<table class=\"object_header\">\n";
5794         git_print_authorship_rows(\%co);
5795         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5796         print "<tr>" .
5797               "<td>tree</td>" .
5798               "<td class=\"sha1\">" .
5799               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5800                        class => "list"}, $co{'tree'}) .
5801               "</td>" .
5802               "<td class=\"link\">" .
5803               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5804                       "tree");
5805         my $snapshot_links = format_snapshot_links($hash);
5806         if (defined $snapshot_links) {
5807                 print " | " . $snapshot_links;
5808         }
5809         print "</td>" .
5810               "</tr>\n";
5811
5812         foreach my $par (@$parents) {
5813                 print "<tr>" .
5814                       "<td>parent</td>" .
5815                       "<td class=\"sha1\">" .
5816                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5817                                class => "list"}, $par) .
5818                       "</td>" .
5819                       "<td class=\"link\">" .
5820                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5821                       " | " .
5822                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5823                       "</td>" .
5824                       "</tr>\n";
5825         }
5826         print "</table>".
5827               "</div>\n";
5828
5829         print "<div class=\"page_body\">\n";
5830         git_print_log($co{'comment'});
5831         print "</div>\n";
5832
5833         git_difftree_body(\@difftree, $hash, @$parents);
5834
5835         git_footer_html();
5836 }
5837
5838 sub git_object {
5839         # object is defined by:
5840         # - hash or hash_base alone
5841         # - hash_base and file_name
5842         my $type;
5843
5844         # - hash or hash_base alone
5845         if ($hash || ($hash_base && !defined $file_name)) {
5846                 my $object_id = $hash || $hash_base;
5847
5848                 open my $fd, "-|", quote_command(
5849                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5850                         or die_error(404, "Object does not exist");
5851                 $type = <$fd>;
5852                 chomp $type;
5853                 close $fd
5854                         or die_error(404, "Object does not exist");
5855
5856         # - hash_base and file_name
5857         } elsif ($hash_base && defined $file_name) {
5858                 $file_name =~ s,/+$,,;
5859
5860                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5861                         or die_error(404, "Base object does not exist");
5862
5863                 # here errors should not hapen
5864                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5865                         or die_error(500, "Open git-ls-tree failed");
5866                 my $line = <$fd>;
5867                 close $fd;
5868
5869                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5870                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5871                         die_error(404, "File or directory for given base does not exist");
5872                 }
5873                 $type = $2;
5874                 $hash = $3;
5875         } else {
5876                 die_error(400, "Not enough information to find object");
5877         }
5878
5879         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5880                                           hash=>$hash, hash_base=>$hash_base,
5881                                           file_name=>$file_name),
5882                              -status => '302 Found');
5883 }
5884
5885 sub git_blobdiff {
5886         my $format = shift || 'html';
5887
5888         my $fd;
5889         my @difftree;
5890         my %diffinfo;
5891         my $expires;
5892
5893         # preparing $fd and %diffinfo for git_patchset_body
5894         # new style URI
5895         if (defined $hash_base && defined $hash_parent_base) {
5896                 if (defined $file_name) {
5897                         # read raw output
5898                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5899                                 $hash_parent_base, $hash_base,
5900                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5901                                 or die_error(500, "Open git-diff-tree failed");
5902                         @difftree = map { chomp; $_ } <$fd>;
5903                         close $fd
5904                                 or die_error(404, "Reading git-diff-tree failed");
5905                         @difftree
5906                                 or die_error(404, "Blob diff not found");
5907
5908                 } elsif (defined $hash &&
5909                          $hash =~ /[0-9a-fA-F]{40}/) {
5910                         # try to find filename from $hash
5911
5912                         # read filtered raw output
5913                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5914                                 $hash_parent_base, $hash_base, "--"
5915                                 or die_error(500, "Open git-diff-tree failed");
5916                         @difftree =
5917                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5918                                 # $hash == to_id
5919                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5920                                 map { chomp; $_ } <$fd>;
5921                         close $fd
5922                                 or die_error(404, "Reading git-diff-tree failed");
5923                         @difftree
5924                                 or die_error(404, "Blob diff not found");
5925
5926                 } else {
5927                         die_error(400, "Missing one of the blob diff parameters");
5928                 }
5929
5930                 if (@difftree > 1) {
5931                         die_error(400, "Ambiguous blob diff specification");
5932                 }
5933
5934                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5935                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5936                 $file_name   ||= $diffinfo{'to_file'};
5937
5938                 $hash_parent ||= $diffinfo{'from_id'};
5939                 $hash        ||= $diffinfo{'to_id'};
5940
5941                 # non-textual hash id's can be cached
5942                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5943                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5944                         $expires = '+1d';
5945                 }
5946
5947                 # open patch output
5948                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5949                         '-p', ($format eq 'html' ? "--full-index" : ()),
5950                         $hash_parent_base, $hash_base,
5951                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5952                         or die_error(500, "Open git-diff-tree failed");
5953         }
5954
5955         # old/legacy style URI -- not generated anymore since 1.4.3.
5956         if (!%diffinfo) {
5957                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5958         }
5959
5960         # header
5961         if ($format eq 'html') {
5962                 my $formats_nav =
5963                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5964                                 "raw");
5965                 git_header_html(undef, $expires);
5966                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5967                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5968                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5969                 } else {
5970                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5971                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5972                 }
5973                 if (defined $file_name) {
5974                         git_print_page_path($file_name, "blob", $hash_base);
5975                 } else {
5976                         print "<div class=\"page_path\"></div>\n";
5977                 }
5978
5979         } elsif ($format eq 'plain') {
5980                 print $cgi->header(
5981                         -type => 'text/plain',
5982                         -charset => 'utf-8',
5983                         -expires => $expires,
5984                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5985
5986                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5987
5988         } else {
5989                 die_error(400, "Unknown blobdiff format");
5990         }
5991
5992         # patch
5993         if ($format eq 'html') {
5994                 print "<div class=\"page_body\">\n";
5995
5996                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5997                 close $fd;
5998
5999                 print "</div>\n"; # class="page_body"
6000                 git_footer_html();
6001
6002         } else {
6003                 while (my $line = <$fd>) {
6004                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6005                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6006
6007                         print $line;
6008
6009                         last if $line =~ m!^\+\+\+!;
6010                 }
6011                 local $/ = undef;
6012                 print <$fd>;
6013                 close $fd;
6014         }
6015 }
6016
6017 sub git_blobdiff_plain {
6018         git_blobdiff('plain');
6019 }
6020
6021 sub git_commitdiff {
6022         my %params = @_;
6023         my $format = $params{-format} || 'html';
6024
6025         my ($patch_max) = gitweb_get_feature('patches');
6026         if ($format eq 'patch') {
6027                 die_error(403, "Patch view not allowed") unless $patch_max;
6028         }
6029
6030         $hash ||= $hash_base || "HEAD";
6031         my %co = parse_commit($hash)
6032             or die_error(404, "Unknown commit object");
6033
6034         # choose format for commitdiff for merge
6035         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6036                 $hash_parent = '--cc';
6037         }
6038         # we need to prepare $formats_nav before almost any parameter munging
6039         my $formats_nav;
6040         if ($format eq 'html') {
6041                 $formats_nav =
6042                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6043                                 "raw");
6044                 if ($patch_max && @{$co{'parents'}} <= 1) {
6045                         $formats_nav .= " | " .
6046                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6047                                         "patch");
6048                 }
6049
6050                 if (defined $hash_parent &&
6051                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6052                         # commitdiff with two commits given
6053                         my $hash_parent_short = $hash_parent;
6054                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6055                                 $hash_parent_short = substr($hash_parent, 0, 7);
6056                         }
6057                         $formats_nav .=
6058                                 ' (from';
6059                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6060                                 if ($co{'parents'}[$i] eq $hash_parent) {
6061                                         $formats_nav .= ' parent ' . ($i+1);
6062                                         last;
6063                                 }
6064                         }
6065                         $formats_nav .= ': ' .
6066                                 $cgi->a({-href => href(action=>"commitdiff",
6067                                                        hash=>$hash_parent)},
6068                                         esc_html($hash_parent_short)) .
6069                                 ')';
6070                 } elsif (!$co{'parent'}) {
6071                         # --root commitdiff
6072                         $formats_nav .= ' (initial)';
6073                 } elsif (scalar @{$co{'parents'}} == 1) {
6074                         # single parent commit
6075                         $formats_nav .=
6076                                 ' (parent: ' .
6077                                 $cgi->a({-href => href(action=>"commitdiff",
6078                                                        hash=>$co{'parent'})},
6079                                         esc_html(substr($co{'parent'}, 0, 7))) .
6080                                 ')';
6081                 } else {
6082                         # merge commit
6083                         if ($hash_parent eq '--cc') {
6084                                 $formats_nav .= ' | ' .
6085                                         $cgi->a({-href => href(action=>"commitdiff",
6086                                                                hash=>$hash, hash_parent=>'-c')},
6087                                                 'combined');
6088                         } else { # $hash_parent eq '-c'
6089                                 $formats_nav .= ' | ' .
6090                                         $cgi->a({-href => href(action=>"commitdiff",
6091                                                                hash=>$hash, hash_parent=>'--cc')},
6092                                                 'compact');
6093                         }
6094                         $formats_nav .=
6095                                 ' (merge: ' .
6096                                 join(' ', map {
6097                                         $cgi->a({-href => href(action=>"commitdiff",
6098                                                                hash=>$_)},
6099                                                 esc_html(substr($_, 0, 7)));
6100                                 } @{$co{'parents'}} ) .
6101                                 ')';
6102                 }
6103         }
6104
6105         my $hash_parent_param = $hash_parent;
6106         if (!defined $hash_parent_param) {
6107                 # --cc for multiple parents, --root for parentless
6108                 $hash_parent_param =
6109                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6110         }
6111
6112         # read commitdiff
6113         my $fd;
6114         my @difftree;
6115         if ($format eq 'html') {
6116                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6117                         "--no-commit-id", "--patch-with-raw", "--full-index",
6118                         $hash_parent_param, $hash, "--"
6119                         or die_error(500, "Open git-diff-tree failed");
6120
6121                 while (my $line = <$fd>) {
6122                         chomp $line;
6123                         # empty line ends raw part of diff-tree output
6124                         last unless $line;
6125                         push @difftree, scalar parse_difftree_raw_line($line);
6126                 }
6127
6128         } elsif ($format eq 'plain') {
6129                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6130                         '-p', $hash_parent_param, $hash, "--"
6131                         or die_error(500, "Open git-diff-tree failed");
6132         } elsif ($format eq 'patch') {
6133                 # For commit ranges, we limit the output to the number of
6134                 # patches specified in the 'patches' feature.
6135                 # For single commits, we limit the output to a single patch,
6136                 # diverging from the git-format-patch default.
6137                 my @commit_spec = ();
6138                 if ($hash_parent) {
6139                         if ($patch_max > 0) {
6140                                 push @commit_spec, "-$patch_max";
6141                         }
6142                         push @commit_spec, '-n', "$hash_parent..$hash";
6143                 } else {
6144                         if ($params{-single}) {
6145                                 push @commit_spec, '-1';
6146                         } else {
6147                                 if ($patch_max > 0) {
6148                                         push @commit_spec, "-$patch_max";
6149                                 }
6150                                 push @commit_spec, "-n";
6151                         }
6152                         push @commit_spec, '--root', $hash;
6153                 }
6154                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6155                         '--encoding=utf8', '--stdout', @commit_spec
6156                         or die_error(500, "Open git-format-patch failed");
6157         } else {
6158                 die_error(400, "Unknown commitdiff format");
6159         }
6160
6161         # non-textual hash id's can be cached
6162         my $expires;
6163         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6164                 $expires = "+1d";
6165         }
6166
6167         # write commit message
6168         if ($format eq 'html') {
6169                 my $refs = git_get_references();
6170                 my $ref = format_ref_marker($refs, $co{'id'});
6171
6172                 git_header_html(undef, $expires);
6173                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6174                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6175                 print "<div class=\"title_text\">\n" .
6176                       "<table class=\"object_header\">\n";
6177                 git_print_authorship_rows(\%co);
6178                 print "</table>".
6179                       "</div>\n";
6180                 print "<div class=\"page_body\">\n";
6181                 if (@{$co{'comment'}} > 1) {
6182                         print "<div class=\"log\">\n";
6183                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6184                         print "</div>\n"; # class="log"
6185                 }
6186
6187         } elsif ($format eq 'plain') {
6188                 my $refs = git_get_references("tags");
6189                 my $tagname = git_get_rev_name_tags($hash);
6190                 my $filename = basename($project) . "-$hash.patch";
6191
6192                 print $cgi->header(
6193                         -type => 'text/plain',
6194                         -charset => 'utf-8',
6195                         -expires => $expires,
6196                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6197                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6198                 print "From: " . to_utf8($co{'author'}) . "\n";
6199                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6200                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6201
6202                 print "X-Git-Tag: $tagname\n" if $tagname;
6203                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6204
6205                 foreach my $line (@{$co{'comment'}}) {
6206                         print to_utf8($line) . "\n";
6207                 }
6208                 print "---\n\n";
6209         } elsif ($format eq 'patch') {
6210                 my $filename = basename($project) . "-$hash.patch";
6211
6212                 print $cgi->header(
6213                         -type => 'text/plain',
6214                         -charset => 'utf-8',
6215                         -expires => $expires,
6216                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6217         }
6218
6219         # write patch
6220         if ($format eq 'html') {
6221                 my $use_parents = !defined $hash_parent ||
6222                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6223                 git_difftree_body(\@difftree, $hash,
6224                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6225                 print "<br/>\n";
6226
6227                 git_patchset_body($fd, \@difftree, $hash,
6228                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6229                 close $fd;
6230                 print "</div>\n"; # class="page_body"
6231                 git_footer_html();
6232
6233         } elsif ($format eq 'plain') {
6234                 local $/ = undef;
6235                 print <$fd>;
6236                 close $fd
6237                         or print "Reading git-diff-tree failed\n";
6238         } elsif ($format eq 'patch') {
6239                 local $/ = undef;
6240                 print <$fd>;
6241                 close $fd
6242                         or print "Reading git-format-patch failed\n";
6243         }
6244 }
6245
6246 sub git_commitdiff_plain {
6247         git_commitdiff(-format => 'plain');
6248 }
6249
6250 # format-patch-style patches
6251 sub git_patch {
6252         git_commitdiff(-format => 'patch', -single => 1);
6253 }
6254
6255 sub git_patches {
6256         git_commitdiff(-format => 'patch');
6257 }
6258
6259 sub git_history {
6260         git_log_generic('history', \&git_history_body,
6261                         $hash_base, $hash_parent_base,
6262                         $file_name, $hash);
6263 }
6264
6265 sub git_search {
6266         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6267         if (!defined $searchtext) {
6268                 die_error(400, "Text field is empty");
6269         }
6270         if (!defined $hash) {
6271                 $hash = git_get_head_hash($project);
6272         }
6273         my %co = parse_commit($hash);
6274         if (!%co) {
6275                 die_error(404, "Unknown commit object");
6276         }
6277         if (!defined $page) {
6278                 $page = 0;
6279         }
6280
6281         $searchtype ||= 'commit';
6282         if ($searchtype eq 'pickaxe') {
6283                 # pickaxe may take all resources of your box and run for several minutes
6284                 # with every query - so decide by yourself how public you make this feature
6285                 gitweb_check_feature('pickaxe')
6286                     or die_error(403, "Pickaxe is disabled");
6287         }
6288         if ($searchtype eq 'grep') {
6289                 gitweb_check_feature('grep')
6290                     or die_error(403, "Grep is disabled");
6291         }
6292
6293         git_header_html();
6294
6295         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6296                 my $greptype;
6297                 if ($searchtype eq 'commit') {
6298                         $greptype = "--grep=";
6299                 } elsif ($searchtype eq 'author') {
6300                         $greptype = "--author=";
6301                 } elsif ($searchtype eq 'committer') {
6302                         $greptype = "--committer=";
6303                 }
6304                 $greptype .= $searchtext;
6305                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6306                                                $greptype, '--regexp-ignore-case',
6307                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6308
6309                 my $paging_nav = '';
6310                 if ($page > 0) {
6311                         $paging_nav .=
6312                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6313                                                        searchtext=>$searchtext,
6314                                                        searchtype=>$searchtype)},
6315                                         "first");
6316                         $paging_nav .= " &sdot; " .
6317                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6318                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6319                 } else {
6320                         $paging_nav .= "first";
6321                         $paging_nav .= " &sdot; prev";
6322                 }
6323                 my $next_link = '';
6324                 if ($#commitlist >= 100) {
6325                         $next_link =
6326                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6327                                          -accesskey => "n", -title => "Alt-n"}, "next");
6328                         $paging_nav .= " &sdot; $next_link";
6329                 } else {
6330                         $paging_nav .= " &sdot; next";
6331                 }
6332
6333                 if ($#commitlist >= 100) {
6334                 }
6335
6336                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6337                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6338                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6339         }
6340
6341         if ($searchtype eq 'pickaxe') {
6342                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6343                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6344
6345                 print "<table class=\"pickaxe search\">\n";
6346                 my $alternate = 1;
6347                 local $/ = "\n";
6348                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6349                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6350                         ($search_use_regexp ? '--pickaxe-regex' : ());
6351                 undef %co;
6352                 my @files;
6353                 while (my $line = <$fd>) {
6354                         chomp $line;
6355                         next unless $line;
6356
6357                         my %set = parse_difftree_raw_line($line);
6358                         if (defined $set{'commit'}) {
6359                                 # finish previous commit
6360                                 if (%co) {
6361                                         print "</td>\n" .
6362                                               "<td class=\"link\">" .
6363                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6364                                               " | " .
6365                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6366                                         print "</td>\n" .
6367                                               "</tr>\n";
6368                                 }
6369
6370                                 if ($alternate) {
6371                                         print "<tr class=\"dark\">\n";
6372                                 } else {
6373                                         print "<tr class=\"light\">\n";
6374                                 }
6375                                 $alternate ^= 1;
6376                                 %co = parse_commit($set{'commit'});
6377                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6378                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6379                                       "<td><i>$author</i></td>\n" .
6380                                       "<td>" .
6381                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6382                                               -class => "list subject"},
6383                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6384                         } elsif (defined $set{'to_id'}) {
6385                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6386
6387                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6388                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6389                                               -class => "list"},
6390                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6391                                       "<br/>\n";
6392                         }
6393                 }
6394                 close $fd;
6395
6396                 # finish last commit (warning: repetition!)
6397                 if (%co) {
6398                         print "</td>\n" .
6399                               "<td class=\"link\">" .
6400                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6401                               " | " .
6402                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6403                         print "</td>\n" .
6404                               "</tr>\n";
6405                 }
6406
6407                 print "</table>\n";
6408         }
6409
6410         if ($searchtype eq 'grep') {
6411                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6412                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6413
6414                 print "<table class=\"grep_search\">\n";
6415                 my $alternate = 1;
6416                 my $matches = 0;
6417                 local $/ = "\n";
6418                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6419                         $search_use_regexp ? ('-E', '-i') : '-F',
6420                         $searchtext, $co{'tree'};
6421                 my $lastfile = '';
6422                 while (my $line = <$fd>) {
6423                         chomp $line;
6424                         my ($file, $lno, $ltext, $binary);
6425                         last if ($matches++ > 1000);
6426                         if ($line =~ /^Binary file (.+) matches$/) {
6427                                 $file = $1;
6428                                 $binary = 1;
6429                         } else {
6430                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6431                         }
6432                         if ($file ne $lastfile) {
6433                                 $lastfile and print "</td></tr>\n";
6434                                 if ($alternate++) {
6435                                         print "<tr class=\"dark\">\n";
6436                                 } else {
6437                                         print "<tr class=\"light\">\n";
6438                                 }
6439                                 print "<td class=\"list\">".
6440                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6441                                                                file_name=>"$file"),
6442                                                 -class => "list"}, esc_path($file));
6443                                 print "</td><td>\n";
6444                                 $lastfile = $file;
6445                         }
6446                         if ($binary) {
6447                                 print "<div class=\"binary\">Binary file</div>\n";
6448                         } else {
6449                                 $ltext = untabify($ltext);
6450                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6451                                         $ltext = esc_html($1, -nbsp=>1);
6452                                         $ltext .= '<span class="match">';
6453                                         $ltext .= esc_html($2, -nbsp=>1);
6454                                         $ltext .= '</span>';
6455                                         $ltext .= esc_html($3, -nbsp=>1);
6456                                 } else {
6457                                         $ltext = esc_html($ltext, -nbsp=>1);
6458                                 }
6459                                 print "<div class=\"pre\">" .
6460                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6461                                                                file_name=>"$file").'#l'.$lno,
6462                                                 -class => "linenr"}, sprintf('%4i', $lno))
6463                                         . ' ' .  $ltext . "</div>\n";
6464                         }
6465                 }
6466                 if ($lastfile) {
6467                         print "</td></tr>\n";
6468                         if ($matches > 1000) {
6469                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6470                         }
6471                 } else {
6472                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6473                 }
6474                 close $fd;
6475
6476                 print "</table>\n";
6477         }
6478         git_footer_html();
6479 }
6480
6481 sub git_search_help {
6482         git_header_html();
6483         git_print_page_nav('','', $hash,$hash,$hash);
6484         print <<EOT;
6485 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6486 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6487 the pattern entered is recognized as the POSIX extended
6488 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6489 insensitive).</p>
6490 <dl>
6491 <dt><b>commit</b></dt>
6492 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6493 EOT
6494         my $have_grep = gitweb_check_feature('grep');
6495         if ($have_grep) {
6496                 print <<EOT;
6497 <dt><b>grep</b></dt>
6498 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6499     a different one) are searched for the given pattern. On large trees, this search can take
6500 a while and put some strain on the server, so please use it with some consideration. Note that
6501 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6502 case-sensitive.</dd>
6503 EOT
6504         }
6505         print <<EOT;
6506 <dt><b>author</b></dt>
6507 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6508 <dt><b>committer</b></dt>
6509 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6510 EOT
6511         my $have_pickaxe = gitweb_check_feature('pickaxe');
6512         if ($have_pickaxe) {
6513                 print <<EOT;
6514 <dt><b>pickaxe</b></dt>
6515 <dd>All commits that caused the string to appear or disappear from any file (changes that
6516 added, removed or "modified" the string) will be listed. This search can take a while and
6517 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6518 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6519 EOT
6520         }
6521         print "</dl>\n";
6522         git_footer_html();
6523 }
6524
6525 sub git_shortlog {
6526         git_log_generic('shortlog', \&git_shortlog_body,
6527                         $hash, $hash_parent);
6528 }
6529
6530 ## ......................................................................
6531 ## feeds (RSS, Atom; OPML)
6532
6533 sub git_feed {
6534         my $format = shift || 'atom';
6535         my $have_blame = gitweb_check_feature('blame');
6536
6537         # Atom: http://www.atomenabled.org/developers/syndication/
6538         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6539         if ($format ne 'rss' && $format ne 'atom') {
6540                 die_error(400, "Unknown web feed format");
6541         }
6542
6543         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6544         my $head = $hash || 'HEAD';
6545         my @commitlist = parse_commits($head, 150, 0, $file_name);
6546
6547         my %latest_commit;
6548         my %latest_date;
6549         my $content_type = "application/$format+xml";
6550         if (defined $cgi->http('HTTP_ACCEPT') &&
6551                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6552                 # browser (feed reader) prefers text/xml
6553                 $content_type = 'text/xml';
6554         }
6555         if (defined($commitlist[0])) {
6556                 %latest_commit = %{$commitlist[0]};
6557                 my $latest_epoch = $latest_commit{'committer_epoch'};
6558                 %latest_date   = parse_date($latest_epoch);
6559                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6560                 if (defined $if_modified) {
6561                         my $since;
6562                         if (eval { require HTTP::Date; 1; }) {
6563                                 $since = HTTP::Date::str2time($if_modified);
6564                         } elsif (eval { require Time::ParseDate; 1; }) {
6565                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6566                         }
6567                         if (defined $since && $latest_epoch <= $since) {
6568                                 print $cgi->header(
6569                                         -type => $content_type,
6570                                         -charset => 'utf-8',
6571                                         -last_modified => $latest_date{'rfc2822'},
6572                                         -status => '304 Not Modified');
6573                                 return;
6574                         }
6575                 }
6576                 print $cgi->header(
6577                         -type => $content_type,
6578                         -charset => 'utf-8',
6579                         -last_modified => $latest_date{'rfc2822'});
6580         } else {
6581                 print $cgi->header(
6582                         -type => $content_type,
6583                         -charset => 'utf-8');
6584         }
6585
6586         # Optimization: skip generating the body if client asks only
6587         # for Last-Modified date.
6588         return if ($cgi->request_method() eq 'HEAD');
6589
6590         # header variables
6591         my $title = "$site_name - $project/$action";
6592         my $feed_type = 'log';
6593         if (defined $hash) {
6594                 $title .= " - '$hash'";
6595                 $feed_type = 'branch log';
6596                 if (defined $file_name) {
6597                         $title .= " :: $file_name";
6598                         $feed_type = 'history';
6599                 }
6600         } elsif (defined $file_name) {
6601                 $title .= " - $file_name";
6602                 $feed_type = 'history';
6603         }
6604         $title .= " $feed_type";
6605         my $descr = git_get_project_description($project);
6606         if (defined $descr) {
6607                 $descr = esc_html($descr);
6608         } else {
6609                 $descr = "$project " .
6610                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6611                          " feed";
6612         }
6613         my $owner = git_get_project_owner($project);
6614         $owner = esc_html($owner);
6615
6616         #header
6617         my $alt_url;
6618         if (defined $file_name) {
6619                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6620         } elsif (defined $hash) {
6621                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6622         } else {
6623                 $alt_url = href(-full=>1, action=>"summary");
6624         }
6625         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6626         if ($format eq 'rss') {
6627                 print <<XML;
6628 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6629 <channel>
6630 XML
6631                 print "<title>$title</title>\n" .
6632                       "<link>$alt_url</link>\n" .
6633                       "<description>$descr</description>\n" .
6634                       "<language>en</language>\n" .
6635                       # project owner is responsible for 'editorial' content
6636                       "<managingEditor>$owner</managingEditor>\n";
6637                 if (defined $logo || defined $favicon) {
6638                         # prefer the logo to the favicon, since RSS
6639                         # doesn't allow both
6640                         my $img = esc_url($logo || $favicon);
6641                         print "<image>\n" .
6642                               "<url>$img</url>\n" .
6643                               "<title>$title</title>\n" .
6644                               "<link>$alt_url</link>\n" .
6645                               "</image>\n";
6646                 }
6647                 if (%latest_date) {
6648                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6649                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6650                 }
6651                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6652         } elsif ($format eq 'atom') {
6653                 print <<XML;
6654 <feed xmlns="http://www.w3.org/2005/Atom">
6655 XML
6656                 print "<title>$title</title>\n" .
6657                       "<subtitle>$descr</subtitle>\n" .
6658                       '<link rel="alternate" type="text/html" href="' .
6659                       $alt_url . '" />' . "\n" .
6660                       '<link rel="self" type="' . $content_type . '" href="' .
6661                       $cgi->self_url() . '" />' . "\n" .
6662                       "<id>" . href(-full=>1) . "</id>\n" .
6663                       # use project owner for feed author
6664                       "<author><name>$owner</name></author>\n";
6665                 if (defined $favicon) {
6666                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6667                 }
6668                 if (defined $logo_url) {
6669                         # not twice as wide as tall: 72 x 27 pixels
6670                         print "<logo>" . esc_url($logo) . "</logo>\n";
6671                 }
6672                 if (! %latest_date) {
6673                         # dummy date to keep the feed valid until commits trickle in:
6674                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6675                 } else {
6676                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6677                 }
6678                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6679         }
6680
6681         # contents
6682         for (my $i = 0; $i <= $#commitlist; $i++) {
6683                 my %co = %{$commitlist[$i]};
6684                 my $commit = $co{'id'};
6685                 # we read 150, we always show 30 and the ones more recent than 48 hours
6686                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6687                         last;
6688                 }
6689                 my %cd = parse_date($co{'author_epoch'});
6690
6691                 # get list of changed files
6692                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6693                         $co{'parent'} || "--root",
6694                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6695                         or next;
6696                 my @difftree = map { chomp; $_ } <$fd>;
6697                 close $fd
6698                         or next;
6699
6700                 # print element (entry, item)
6701                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6702                 if ($format eq 'rss') {
6703                         print "<item>\n" .
6704                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6705                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6706                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6707                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6708                               "<link>$co_url</link>\n" .
6709                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6710                               "<content:encoded>" .
6711                               "<![CDATA[\n";
6712                 } elsif ($format eq 'atom') {
6713                         print "<entry>\n" .
6714                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6715                               "<updated>$cd{'iso-8601'}</updated>\n" .
6716                               "<author>\n" .
6717                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6718                         if ($co{'author_email'}) {
6719                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6720                         }
6721                         print "</author>\n" .
6722                               # use committer for contributor
6723                               "<contributor>\n" .
6724                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6725                         if ($co{'committer_email'}) {
6726                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6727                         }
6728                         print "</contributor>\n" .
6729                               "<published>$cd{'iso-8601'}</published>\n" .
6730                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6731                               "<id>$co_url</id>\n" .
6732                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6733                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6734                 }
6735                 my $comment = $co{'comment'};
6736                 print "<pre>\n";
6737                 foreach my $line (@$comment) {
6738                         $line = esc_html($line);
6739                         print "$line\n";
6740                 }
6741                 print "</pre><ul>\n";
6742                 foreach my $difftree_line (@difftree) {
6743                         my %difftree = parse_difftree_raw_line($difftree_line);
6744                         next if !$difftree{'from_id'};
6745
6746                         my $file = $difftree{'file'} || $difftree{'to_file'};
6747
6748                         print "<li>" .
6749                               "[" .
6750                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6751                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6752                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6753                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6754                                       -title => "diff"}, 'D');
6755                         if ($have_blame) {
6756                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6757                                                              file_name=>$file, hash_base=>$commit),
6758                                               -title => "blame"}, 'B');
6759                         }
6760                         # if this is not a feed of a file history
6761                         if (!defined $file_name || $file_name ne $file) {
6762                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6763                                                              file_name=>$file, hash=>$commit),
6764                                               -title => "history"}, 'H');
6765                         }
6766                         $file = esc_path($file);
6767                         print "] ".
6768                               "$file</li>\n";
6769                 }
6770                 if ($format eq 'rss') {
6771                         print "</ul>]]>\n" .
6772                               "</content:encoded>\n" .
6773                               "</item>\n";
6774                 } elsif ($format eq 'atom') {
6775                         print "</ul>\n</div>\n" .
6776                               "</content>\n" .
6777                               "</entry>\n";
6778                 }
6779         }
6780
6781         # end of feed
6782         if ($format eq 'rss') {
6783                 print "</channel>\n</rss>\n";
6784         } elsif ($format eq 'atom') {
6785                 print "</feed>\n";
6786         }
6787 }
6788
6789 sub git_rss {
6790         git_feed('rss');
6791 }
6792
6793 sub git_atom {
6794         git_feed('atom');
6795 }
6796
6797 sub git_opml {
6798         my @list = git_get_projects_list();
6799
6800         print $cgi->header(
6801                 -type => 'text/xml',
6802                 -charset => 'utf-8',
6803                 -content_disposition => 'inline; filename="opml.xml"');
6804
6805         print <<XML;
6806 <?xml version="1.0" encoding="utf-8"?>
6807 <opml version="1.0">
6808 <head>
6809   <title>$site_name OPML Export</title>
6810 </head>
6811 <body>
6812 <outline text="git RSS feeds">
6813 XML
6814
6815         foreach my $pr (@list) {
6816                 my %proj = %$pr;
6817                 my $head = git_get_head_hash($proj{'path'});
6818                 if (!defined $head) {
6819                         next;
6820                 }
6821                 $git_dir = "$projectroot/$proj{'path'}";
6822                 my %co = parse_commit($head);
6823                 if (!%co) {
6824                         next;
6825                 }
6826
6827                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6828                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6829                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6830                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6831         }
6832         print <<XML;
6833 </outline>
6834 </body>
6835 </opml>
6836 XML
6837 }