Lady’s Gitweb - Gitweb/blob - gitweb.perl

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