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 : $action) .
3509               "\n</div>\n";
3510 }
3511
3512 sub print_local_time {
3513         my %date = @_;
3514         if ($date{'hour_local'} < 6) {
3515                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3516                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3517         } else {
3518                 printf(" (%02d:%02d %s)",
3519                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3520         }
3521 }
3522
3523 # Outputs the author name and date in long form
3524 sub git_print_authorship {
3525         my $co = shift;
3526         my %opts = @_;
3527         my $tag = $opts{-tag} || 'div';
3528         my $author = $co->{'author_name'};
3529
3530         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3531         print "<$tag class=\"author_date\">" .
3532               format_search_author($author, "author", esc_html($author)) .
3533               " [$ad{'rfc2822'}";
3534         print_local_time(%ad) if ($opts{-localtime});
3535         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3536                   . "</$tag>\n";
3537 }
3538
3539 # Outputs table rows containing the full author or committer information,
3540 # in the format expected for 'commit' view (& similia).
3541 # Parameters are a commit hash reference, followed by the list of people
3542 # to output information for. If the list is empty it defalts to both
3543 # author and committer.
3544 sub git_print_authorship_rows {
3545         my $co = shift;
3546         # too bad we can't use @people = @_ || ('author', 'committer')
3547         my @people = @_;
3548         @people = ('author', 'committer') unless @people;
3549         foreach my $who (@people) {
3550                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3551                 print "<tr><td>$who</td><td>" .
3552                       format_search_author($co->{"${who}_name"}, $who,
3553                                esc_html($co->{"${who}_name"})) . " " .
3554                       format_search_author($co->{"${who}_email"}, $who,
3555                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3556                       "</td><td rowspan=\"2\">" .
3557                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3558                       "</td></tr>\n" .
3559                       "<tr>" .
3560                       "<td></td><td> $wd{'rfc2822'}";
3561                 print_local_time(%wd);
3562                 print "</td>" .
3563                       "</tr>\n";
3564         }
3565 }
3566
3567 sub git_print_page_path {
3568         my $name = shift;
3569         my $type = shift;
3570         my $hb = shift;
3571
3572
3573         print "<div class=\"page_path\">";
3574         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3575                       -title => 'tree root'}, to_utf8("[$project]"));
3576         print " / ";
3577         if (defined $name) {
3578                 my @dirname = split '/', $name;
3579                 my $basename = pop @dirname;
3580                 my $fullname = '';
3581
3582                 foreach my $dir (@dirname) {
3583                         $fullname .= ($fullname ? '/' : '') . $dir;
3584                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3585                                                      hash_base=>$hb),
3586                                       -title => $fullname}, esc_path($dir));
3587                         print " / ";
3588                 }
3589                 if (defined $type && $type eq 'blob') {
3590                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3591                                                      hash_base=>$hb),
3592                                       -title => $name}, esc_path($basename));
3593                 } elsif (defined $type && $type eq 'tree') {
3594                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3595                                                      hash_base=>$hb),
3596                                       -title => $name}, esc_path($basename));
3597                         print " / ";
3598                 } else {
3599                         print esc_path($basename);
3600                 }
3601         }
3602         print "<br/></div>\n";
3603 }
3604
3605 sub git_print_log {
3606         my $log = shift;
3607         my %opts = @_;
3608
3609         if ($opts{'-remove_title'}) {
3610                 # remove title, i.e. first line of log
3611                 shift @$log;
3612         }
3613         # remove leading empty lines
3614         while (defined $log->[0] && $log->[0] eq "") {
3615                 shift @$log;
3616         }
3617
3618         # print log
3619         my $signoff = 0;
3620         my $empty = 0;
3621         foreach my $line (@$log) {
3622                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3623                         $signoff = 1;
3624                         $empty = 0;
3625                         if (! $opts{'-remove_signoff'}) {
3626                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3627                                 next;
3628                         } else {
3629                                 # remove signoff lines
3630                                 next;
3631                         }
3632                 } else {
3633                         $signoff = 0;
3634                 }
3635
3636                 # print only one empty line
3637                 # do not print empty line after signoff
3638                 if ($line eq "") {
3639                         next if ($empty || $signoff);
3640                         $empty = 1;
3641                 } else {
3642                         $empty = 0;
3643                 }
3644
3645                 print format_log_line_html($line) . "<br/>\n";
3646         }
3647
3648         if ($opts{'-final_empty_line'}) {
3649                 # end with single empty line
3650                 print "<br/>\n" unless $empty;
3651         }
3652 }
3653
3654 # return link target (what link points to)
3655 sub git_get_link_target {
3656         my $hash = shift;
3657         my $link_target;
3658
3659         # read link
3660         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3661                 or return;
3662         {
3663                 local $/ = undef;
3664                 $link_target = <$fd>;
3665         }
3666         close $fd
3667                 or return;
3668
3669         return $link_target;
3670 }
3671
3672 # given link target, and the directory (basedir) the link is in,
3673 # return target of link relative to top directory (top tree);
3674 # return undef if it is not possible (including absolute links).
3675 sub normalize_link_target {
3676         my ($link_target, $basedir) = @_;
3677
3678         # absolute symlinks (beginning with '/') cannot be normalized
3679         return if (substr($link_target, 0, 1) eq '/');
3680
3681         # normalize link target to path from top (root) tree (dir)
3682         my $path;
3683         if ($basedir) {
3684                 $path = $basedir . '/' . $link_target;
3685         } else {
3686                 # we are in top (root) tree (dir)
3687                 $path = $link_target;
3688         }
3689
3690         # remove //, /./, and /../
3691         my @path_parts;
3692         foreach my $part (split('/', $path)) {
3693                 # discard '.' and ''
3694                 next if (!$part || $part eq '.');
3695                 # handle '..'
3696                 if ($part eq '..') {
3697                         if (@path_parts) {
3698                                 pop @path_parts;
3699                         } else {
3700                                 # link leads outside repository (outside top dir)
3701                                 return;
3702                         }
3703                 } else {
3704                         push @path_parts, $part;
3705                 }
3706         }
3707         $path = join('/', @path_parts);
3708
3709         return $path;
3710 }
3711
3712 # print tree entry (row of git_tree), but without encompassing <tr> element
3713 sub git_print_tree_entry {
3714         my ($t, $basedir, $hash_base, $have_blame) = @_;
3715
3716         my %base_key = ();
3717         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3718
3719         # The format of a table row is: mode list link.  Where mode is
3720         # the mode of the entry, list is the name of the entry, an href,
3721         # and link is the action links of the entry.
3722
3723         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3724         if (exists $t->{'size'}) {
3725                 print "<td class=\"size\">$t->{'size'}</td>\n";
3726         }
3727         if ($t->{'type'} eq "blob") {
3728                 print "<td class=\"list\">" .
3729                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3730                                                file_name=>"$basedir$t->{'name'}", %base_key),
3731                                 -class => "list"}, esc_path($t->{'name'}));
3732                 if (S_ISLNK(oct $t->{'mode'})) {
3733                         my $link_target = git_get_link_target($t->{'hash'});
3734                         if ($link_target) {
3735                                 my $norm_target = normalize_link_target($link_target, $basedir);
3736                                 if (defined $norm_target) {
3737                                         print " -> " .
3738                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3739                                                                      file_name=>$norm_target),
3740                                                        -title => $norm_target}, esc_path($link_target));
3741                                 } else {
3742                                         print " -> " . esc_path($link_target);
3743                                 }
3744                         }
3745                 }
3746                 print "</td>\n";
3747                 print "<td class=\"link\">";
3748                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3749                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3750                               "blob");
3751                 if ($have_blame) {
3752                         print " | " .
3753                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3754                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3755                                       "blame");
3756                 }
3757                 if (defined $hash_base) {
3758                         print " | " .
3759                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3760                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3761                                       "history");
3762                 }
3763                 print " | " .
3764                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3765                                                file_name=>"$basedir$t->{'name'}")},
3766                                 "raw");
3767                 print "</td>\n";
3768
3769         } elsif ($t->{'type'} eq "tree") {
3770                 print "<td class=\"list\">";
3771                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3772                                              file_name=>"$basedir$t->{'name'}",
3773                                              %base_key)},
3774                               esc_path($t->{'name'}));
3775                 print "</td>\n";
3776                 print "<td class=\"link\">";
3777                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3778                                              file_name=>"$basedir$t->{'name'}",
3779                                              %base_key)},
3780                               "tree");
3781                 if (defined $hash_base) {
3782                         print " | " .
3783                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3784                                                      file_name=>"$basedir$t->{'name'}")},
3785                                       "history");
3786                 }
3787                 print "</td>\n";
3788         } else {
3789                 # unknown object: we can only present history for it
3790                 # (this includes 'commit' object, i.e. submodule support)
3791                 print "<td class=\"list\">" .
3792                       esc_path($t->{'name'}) .
3793                       "</td>\n";
3794                 print "<td class=\"link\">";
3795                 if (defined $hash_base) {
3796                         print $cgi->a({-href => href(action=>"history",
3797                                                      hash_base=>$hash_base,
3798                                                      file_name=>"$basedir$t->{'name'}")},
3799                                       "history");
3800                 }
3801                 print "</td>\n";
3802         }
3803 }
3804
3805 ## ......................................................................
3806 ## functions printing large fragments of HTML
3807
3808 # get pre-image filenames for merge (combined) diff
3809 sub fill_from_file_info {
3810         my ($diff, @parents) = @_;
3811
3812         $diff->{'from_file'} = [ ];
3813         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3814         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3815                 if ($diff->{'status'}[$i] eq 'R' ||
3816                     $diff->{'status'}[$i] eq 'C') {
3817                         $diff->{'from_file'}[$i] =
3818                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3819                 }
3820         }
3821
3822         return $diff;
3823 }
3824
3825 # is current raw difftree line of file deletion
3826 sub is_deleted {
3827         my $diffinfo = shift;
3828
3829         return $diffinfo->{'to_id'} eq ('0' x 40);
3830 }
3831
3832 # does patch correspond to [previous] difftree raw line
3833 # $diffinfo  - hashref of parsed raw diff format
3834 # $patchinfo - hashref of parsed patch diff format
3835 #              (the same keys as in $diffinfo)
3836 sub is_patch_split {
3837         my ($diffinfo, $patchinfo) = @_;
3838
3839         return defined $diffinfo && defined $patchinfo
3840                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3841 }
3842
3843
3844 sub git_difftree_body {
3845         my ($difftree, $hash, @parents) = @_;
3846         my ($parent) = $parents[0];
3847         my $have_blame = gitweb_check_feature('blame');
3848         print "<div class=\"list_head\">\n";
3849         if ($#{$difftree} > 10) {
3850                 print(($#{$difftree} + 1) . " files changed:\n");
3851         }
3852         print "</div>\n";
3853
3854         print "<table class=\"" .
3855               (@parents > 1 ? "combined " : "") .
3856               "diff_tree\">\n";
3857
3858         # header only for combined diff in 'commitdiff' view
3859         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3860         if ($has_header) {
3861                 # table header
3862                 print "<thead><tr>\n" .
3863                        "<th></th><th></th>\n"; # filename, patchN link
3864                 for (my $i = 0; $i < @parents; $i++) {
3865                         my $par = $parents[$i];
3866                         print "<th>" .
3867                               $cgi->a({-href => href(action=>"commitdiff",
3868                                                      hash=>$hash, hash_parent=>$par),
3869                                        -title => 'commitdiff to parent number ' .
3870                                                   ($i+1) . ': ' . substr($par,0,7)},
3871                                       $i+1) .
3872                               "&nbsp;</th>\n";
3873                 }
3874                 print "</tr></thead>\n<tbody>\n";
3875         }
3876
3877         my $alternate = 1;
3878         my $patchno = 0;
3879         foreach my $line (@{$difftree}) {
3880                 my $diff = parsed_difftree_line($line);
3881
3882                 if ($alternate) {
3883                         print "<tr class=\"dark\">\n";
3884                 } else {
3885                         print "<tr class=\"light\">\n";
3886                 }
3887                 $alternate ^= 1;
3888
3889                 if (exists $diff->{'nparents'}) { # combined diff
3890
3891                         fill_from_file_info($diff, @parents)
3892                                 unless exists $diff->{'from_file'};
3893
3894                         if (!is_deleted($diff)) {
3895                                 # file exists in the result (child) commit
3896                                 print "<td>" .
3897                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3898                                                              file_name=>$diff->{'to_file'},
3899                                                              hash_base=>$hash),
3900                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3901                                       "</td>\n";
3902                         } else {
3903                                 print "<td>" .
3904                                       esc_path($diff->{'to_file'}) .
3905                                       "</td>\n";
3906                         }
3907
3908                         if ($action eq 'commitdiff') {
3909                                 # link to patch
3910                                 $patchno++;
3911                                 print "<td class=\"link\">" .
3912                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3913                                       " | " .
3914                                       "</td>\n";
3915                         }
3916
3917                         my $has_history = 0;
3918                         my $not_deleted = 0;
3919                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3920                                 my $hash_parent = $parents[$i];
3921                                 my $from_hash = $diff->{'from_id'}[$i];
3922                                 my $from_path = $diff->{'from_file'}[$i];
3923                                 my $status = $diff->{'status'}[$i];
3924
3925                                 $has_history ||= ($status ne 'A');
3926                                 $not_deleted ||= ($status ne 'D');
3927
3928                                 if ($status eq 'A') {
3929                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3930                                 } elsif ($status eq 'D') {
3931                                         print "<td class=\"link\">" .
3932                                               $cgi->a({-href => href(action=>"blob",
3933                                                                      hash_base=>$hash,
3934                                                                      hash=>$from_hash,
3935                                                                      file_name=>$from_path)},
3936                                                       "blob" . ($i+1)) .
3937                                               " | </td>\n";
3938                                 } else {
3939                                         if ($diff->{'to_id'} eq $from_hash) {
3940                                                 print "<td class=\"link nochange\">";
3941                                         } else {
3942                                                 print "<td class=\"link\">";
3943                                         }
3944                                         print $cgi->a({-href => href(action=>"blobdiff",
3945                                                                      hash=>$diff->{'to_id'},
3946                                                                      hash_parent=>$from_hash,
3947                                                                      hash_base=>$hash,
3948                                                                      hash_parent_base=>$hash_parent,
3949                                                                      file_name=>$diff->{'to_file'},
3950                                                                      file_parent=>$from_path)},
3951                                                       "diff" . ($i+1)) .
3952                                               " | </td>\n";
3953                                 }
3954                         }
3955
3956                         print "<td class=\"link\">";
3957                         if ($not_deleted) {
3958                                 print $cgi->a({-href => href(action=>"blob",
3959                                                              hash=>$diff->{'to_id'},
3960                                                              file_name=>$diff->{'to_file'},
3961                                                              hash_base=>$hash)},
3962                                               "blob");
3963                                 print " | " if ($has_history);
3964                         }
3965                         if ($has_history) {
3966                                 print $cgi->a({-href => href(action=>"history",
3967                                                              file_name=>$diff->{'to_file'},
3968                                                              hash_base=>$hash)},
3969                                               "history");
3970                         }
3971                         print "</td>\n";
3972
3973                         print "</tr>\n";
3974                         next; # instead of 'else' clause, to avoid extra indent
3975                 }
3976                 # else ordinary diff
3977
3978                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3979                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3980                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3981                         $to_mode_oct = oct $diff->{'to_mode'};
3982                         if (S_ISREG($to_mode_oct)) { # only for regular file
3983                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3984                         }
3985                         $to_file_type = file_type($diff->{'to_mode'});
3986                 }
3987                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3988                         $from_mode_oct = oct $diff->{'from_mode'};
3989                         if (S_ISREG($to_mode_oct)) { # only for regular file
3990                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3991                         }
3992                         $from_file_type = file_type($diff->{'from_mode'});
3993                 }
3994
3995                 if ($diff->{'status'} eq "A") { # created
3996                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3997                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3998                         $mode_chng   .= "]</span>";
3999                         print "<td>";
4000                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4001                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4002                                       -class => "list"}, esc_path($diff->{'file'}));
4003                         print "</td>\n";
4004                         print "<td>$mode_chng</td>\n";
4005                         print "<td class=\"link\">";
4006                         if ($action eq 'commitdiff') {
4007                                 # link to patch
4008                                 $patchno++;
4009                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4010                                 print " | ";
4011                         }
4012                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4013                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4014                                       "blob");
4015                         print "</td>\n";
4016
4017                 } elsif ($diff->{'status'} eq "D") { # deleted
4018                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4019                         print "<td>";
4020                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4021                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4022                                        -class => "list"}, esc_path($diff->{'file'}));
4023                         print "</td>\n";
4024                         print "<td>$mode_chng</td>\n";
4025                         print "<td class=\"link\">";
4026                         if ($action eq 'commitdiff') {
4027                                 # link to patch
4028                                 $patchno++;
4029                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4030                                 print " | ";
4031                         }
4032                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4033                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4034                                       "blob") . " | ";
4035                         if ($have_blame) {
4036                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4037                                                              file_name=>$diff->{'file'})},
4038                                               "blame") . " | ";
4039                         }
4040                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4041                                                      file_name=>$diff->{'file'})},
4042                                       "history");
4043                         print "</td>\n";
4044
4045                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4046                         my $mode_chnge = "";
4047                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4048                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4049                                 if ($from_file_type ne $to_file_type) {
4050                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4051                                 }
4052                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4053                                         if ($from_mode_str && $to_mode_str) {
4054                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4055                                         } elsif ($to_mode_str) {
4056                                                 $mode_chnge .= " mode: $to_mode_str";
4057                                         }
4058                                 }
4059                                 $mode_chnge .= "]</span>\n";
4060                         }
4061                         print "<td>";
4062                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4063                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4064                                       -class => "list"}, esc_path($diff->{'file'}));
4065                         print "</td>\n";
4066                         print "<td>$mode_chnge</td>\n";
4067                         print "<td class=\"link\">";
4068                         if ($action eq 'commitdiff') {
4069                                 # link to patch
4070                                 $patchno++;
4071                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4072                                       " | ";
4073                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4074                                 # "commit" view and modified file (not onlu mode changed)
4075                                 print $cgi->a({-href => href(action=>"blobdiff",
4076                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4077                                                              hash_base=>$hash, hash_parent_base=>$parent,
4078                                                              file_name=>$diff->{'file'})},
4079                                               "diff") .
4080                                       " | ";
4081                         }
4082                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4083                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4084                                        "blob") . " | ";
4085                         if ($have_blame) {
4086                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4087                                                              file_name=>$diff->{'file'})},
4088                                               "blame") . " | ";
4089                         }
4090                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4091                                                      file_name=>$diff->{'file'})},
4092                                       "history");
4093                         print "</td>\n";
4094
4095                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4096                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4097                         my $nstatus = $status_name{$diff->{'status'}};
4098                         my $mode_chng = "";
4099                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4100                                 # mode also for directories, so we cannot use $to_mode_str
4101                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4102                         }
4103                         print "<td>" .
4104                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4105                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4106                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4107                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4108                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4109                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4110                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4111                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4112                               "<td class=\"link\">";
4113                         if ($action eq 'commitdiff') {
4114                                 # link to patch
4115                                 $patchno++;
4116                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4117                                       " | ";
4118                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4119                                 # "commit" view and modified file (not only pure rename or copy)
4120                                 print $cgi->a({-href => href(action=>"blobdiff",
4121                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4122                                                              hash_base=>$hash, hash_parent_base=>$parent,
4123                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4124                                               "diff") .
4125                                       " | ";
4126                         }
4127                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4128                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4129                                       "blob") . " | ";
4130                         if ($have_blame) {
4131                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4132                                                              file_name=>$diff->{'to_file'})},
4133                                               "blame") . " | ";
4134                         }
4135                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4136                                                     file_name=>$diff->{'to_file'})},
4137                                       "history");
4138                         print "</td>\n";
4139
4140                 } # we should not encounter Unmerged (U) or Unknown (X) status
4141                 print "</tr>\n";
4142         }
4143         print "</tbody>" if $has_header;
4144         print "</table>\n";
4145 }
4146
4147 sub git_patchset_body {
4148         my ($fd, $difftree, $hash, @hash_parents) = @_;
4149         my ($hash_parent) = $hash_parents[0];
4150
4151         my $is_combined = (@hash_parents > 1);
4152         my $patch_idx = 0;
4153         my $patch_number = 0;
4154         my $patch_line;
4155         my $diffinfo;
4156         my $to_name;
4157         my (%from, %to);
4158
4159         print "<div class=\"patchset\">\n";
4160
4161         # skip to first patch
4162         while ($patch_line = <$fd>) {
4163                 chomp $patch_line;
4164
4165                 last if ($patch_line =~ m/^diff /);
4166         }
4167
4168  PATCH:
4169         while ($patch_line) {
4170
4171                 # parse "git diff" header line
4172                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4173                         # $1 is from_name, which we do not use
4174                         $to_name = unquote($2);
4175                         $to_name =~ s!^b/!!;
4176                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4177                         # $1 is 'cc' or 'combined', which we do not use
4178                         $to_name = unquote($2);
4179                 } else {
4180                         $to_name = undef;
4181                 }
4182
4183                 # check if current patch belong to current raw line
4184                 # and parse raw git-diff line if needed
4185                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4186                         # this is continuation of a split patch
4187                         print "<div class=\"patch cont\">\n";
4188                 } else {
4189                         # advance raw git-diff output if needed
4190                         $patch_idx++ if defined $diffinfo;
4191
4192                         # read and prepare patch information
4193                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4194
4195                         # compact combined diff output can have some patches skipped
4196                         # find which patch (using pathname of result) we are at now;
4197                         if ($is_combined) {
4198                                 while ($to_name ne $diffinfo->{'to_file'}) {
4199                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4200                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4201                                               "</div>\n";  # class="patch"
4202
4203                                         $patch_idx++;
4204                                         $patch_number++;
4205
4206                                         last if $patch_idx > $#$difftree;
4207                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4208                                 }
4209                         }
4210
4211                         # modifies %from, %to hashes
4212                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4213
4214                         # this is first patch for raw difftree line with $patch_idx index
4215                         # we index @$difftree array from 0, but number patches from 1
4216                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4217                 }
4218
4219                 # git diff header
4220                 #assert($patch_line =~ m/^diff /) if DEBUG;
4221                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4222                 $patch_number++;
4223                 # print "git diff" header
4224                 print format_git_diff_header_line($patch_line, $diffinfo,
4225                                                   \%from, \%to);
4226
4227                 # print extended diff header
4228                 print "<div class=\"diff extended_header\">\n";
4229         EXTENDED_HEADER:
4230                 while ($patch_line = <$fd>) {
4231                         chomp $patch_line;
4232
4233                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4234
4235                         print format_extended_diff_header_line($patch_line, $diffinfo,
4236                                                                \%from, \%to);
4237                 }
4238                 print "</div>\n"; # class="diff extended_header"
4239
4240                 # from-file/to-file diff header
4241                 if (! $patch_line) {
4242                         print "</div>\n"; # class="patch"
4243                         last PATCH;
4244                 }
4245                 next PATCH if ($patch_line =~ m/^diff /);
4246                 #assert($patch_line =~ m/^---/) if DEBUG;
4247
4248                 my $last_patch_line = $patch_line;
4249                 $patch_line = <$fd>;
4250                 chomp $patch_line;
4251                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4252
4253                 print format_diff_from_to_header($last_patch_line, $patch_line,
4254                                                  $diffinfo, \%from, \%to,
4255                                                  @hash_parents);
4256
4257                 # the patch itself
4258         LINE:
4259                 while ($patch_line = <$fd>) {
4260                         chomp $patch_line;
4261
4262                         next PATCH if ($patch_line =~ m/^diff /);
4263
4264                         print format_diff_line($patch_line, \%from, \%to);
4265                 }
4266
4267         } continue {
4268                 print "</div>\n"; # class="patch"
4269         }
4270
4271         # for compact combined (--cc) format, with chunk and patch simpliciaction
4272         # patchset might be empty, but there might be unprocessed raw lines
4273         for (++$patch_idx if $patch_number > 0;
4274              $patch_idx < @$difftree;
4275              ++$patch_idx) {
4276                 # read and prepare patch information
4277                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4278
4279                 # generate anchor for "patch" links in difftree / whatchanged part
4280                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4281                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4282                       "</div>\n";  # class="patch"
4283
4284                 $patch_number++;
4285         }
4286
4287         if ($patch_number == 0) {
4288                 if (@hash_parents > 1) {
4289                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4290                 } else {
4291                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4292                 }
4293         }
4294
4295         print "</div>\n"; # class="patchset"
4296 }
4297
4298 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4299
4300 # fills project list info (age, description, owner, forks) for each
4301 # project in the list, removing invalid projects from returned list
4302 # NOTE: modifies $projlist, but does not remove entries from it
4303 sub fill_project_list_info {
4304         my ($projlist, $check_forks) = @_;
4305         my @projects;
4306
4307         my $show_ctags = gitweb_check_feature('ctags');
4308  PROJECT:
4309         foreach my $pr (@$projlist) {
4310                 my (@activity) = git_get_last_activity($pr->{'path'});
4311                 unless (@activity) {
4312                         next PROJECT;
4313                 }
4314                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4315                 if (!defined $pr->{'descr'}) {
4316                         my $descr = git_get_project_description($pr->{'path'}) || "";
4317                         $descr = to_utf8($descr);
4318                         $pr->{'descr_long'} = $descr;
4319                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4320                 }
4321                 if (!defined $pr->{'owner'}) {
4322                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4323                 }
4324                 if ($check_forks) {
4325                         my $pname = $pr->{'path'};
4326                         if (($pname =~ s/\.git$//) &&
4327                             ($pname !~ /\/$/) &&
4328                             (-d "$projectroot/$pname")) {
4329                                 $pr->{'forks'} = "-d $projectroot/$pname";
4330                         } else {
4331                                 $pr->{'forks'} = 0;
4332                         }
4333                 }
4334                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4335                 push @projects, $pr;
4336         }
4337
4338         return @projects;
4339 }
4340
4341 # print 'sort by' <th> element, generating 'sort by $name' replay link
4342 # if that order is not selected
4343 sub print_sort_th {
4344         my ($name, $order, $header) = @_;
4345         $header ||= ucfirst($name);
4346
4347         if ($order eq $name) {
4348                 print "<th>$header</th>\n";
4349         } else {
4350                 print "<th>" .
4351                       $cgi->a({-href => href(-replay=>1, order=>$name),
4352                                -class => "header"}, $header) .
4353                       "</th>\n";
4354         }
4355 }
4356
4357 sub git_project_list_body {
4358         # actually uses global variable $project
4359         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4360
4361         my $check_forks = gitweb_check_feature('forks');
4362         my @projects = fill_project_list_info($projlist, $check_forks);
4363
4364         $order ||= $default_projects_order;
4365         $from = 0 unless defined $from;
4366         $to = $#projects if (!defined $to || $#projects < $to);
4367
4368         my %order_info = (
4369                 project => { key => 'path', type => 'str' },
4370                 descr => { key => 'descr_long', type => 'str' },
4371                 owner => { key => 'owner', type => 'str' },
4372                 age => { key => 'age', type => 'num' }
4373         );
4374         my $oi = $order_info{$order};
4375         if ($oi->{'type'} eq 'str') {
4376                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4377         } else {
4378                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4379         }
4380
4381         my $show_ctags = gitweb_check_feature('ctags');
4382         if ($show_ctags) {
4383                 my %ctags;
4384                 foreach my $p (@projects) {
4385                         foreach my $ct (keys %{$p->{'ctags'}}) {
4386                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4387                         }
4388                 }
4389                 my $cloud = git_populate_project_tagcloud(\%ctags);
4390                 print git_show_project_tagcloud($cloud, 64);
4391         }
4392
4393         print "<table class=\"project_list\">\n";
4394         unless ($no_header) {
4395                 print "<tr>\n";
4396                 if ($check_forks) {
4397                         print "<th></th>\n";
4398                 }
4399                 print_sort_th('project', $order, 'Project');
4400                 print_sort_th('descr', $order, 'Description');
4401                 print_sort_th('owner', $order, 'Owner');
4402                 print_sort_th('age', $order, 'Last Change');
4403                 print "<th></th>\n" . # for links
4404                       "</tr>\n";
4405         }
4406         my $alternate = 1;
4407         my $tagfilter = $cgi->param('by_tag');
4408         for (my $i = $from; $i <= $to; $i++) {
4409                 my $pr = $projects[$i];
4410
4411                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4412                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4413                         and not $pr->{'descr_long'} =~ /$searchtext/;
4414                 # Weed out forks or non-matching entries of search
4415                 if ($check_forks) {
4416                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4417                         $forkbase="^$forkbase" if $forkbase;
4418                         next if not $searchtext and not $tagfilter and $show_ctags
4419                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4420                 }
4421
4422                 if ($alternate) {
4423                         print "<tr class=\"dark\">\n";
4424                 } else {
4425                         print "<tr class=\"light\">\n";
4426                 }
4427                 $alternate ^= 1;
4428                 if ($check_forks) {
4429                         print "<td>";
4430                         if ($pr->{'forks'}) {
4431                                 print "<!-- $pr->{'forks'} -->\n";
4432                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4433                         }
4434                         print "</td>\n";
4435                 }
4436                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4437                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4438                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4439                                         -class => "list", -title => $pr->{'descr_long'}},
4440                                         esc_html($pr->{'descr'})) . "</td>\n" .
4441                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4442                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4443                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4444                       "<td class=\"link\">" .
4445                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4446                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4447                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4448                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4449                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4450                       "</td>\n" .
4451                       "</tr>\n";
4452         }
4453         if (defined $extra) {
4454                 print "<tr>\n";
4455                 if ($check_forks) {
4456                         print "<td></td>\n";
4457                 }
4458                 print "<td colspan=\"5\">$extra</td>\n" .
4459                       "</tr>\n";
4460         }
4461         print "</table>\n";
4462 }
4463
4464 sub git_log_body {
4465         # uses global variable $project
4466         my ($commitlist, $from, $to, $refs, $extra) = @_;
4467
4468         $from = 0 unless defined $from;
4469         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4470
4471         for (my $i = 0; $i <= $to; $i++) {
4472                 my %co = %{$commitlist->[$i]};
4473                 next if !%co;
4474                 my $commit = $co{'id'};
4475                 my $ref = format_ref_marker($refs, $commit);
4476                 my %ad = parse_date($co{'author_epoch'});
4477                 git_print_header_div('commit',
4478                                "<span class=\"age\">$co{'age_string'}</span>" .
4479                                esc_html($co{'title'}) . $ref,
4480                                $commit);
4481                 print "<div class=\"title_text\">\n" .
4482                       "<div class=\"log_link\">\n" .
4483                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4484                       " | " .
4485                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4486                       " | " .
4487                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4488                       "<br/>\n" .
4489                       "</div>\n";
4490                       git_print_authorship(\%co, -tag => 'span');
4491                       print "<br/>\n</div>\n";
4492
4493                 print "<div class=\"log_body\">\n";
4494                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4495                 print "</div>\n";
4496         }
4497         if ($extra) {
4498                 print "<div class=\"page_nav\">\n";
4499                 print "$extra\n";
4500                 print "</div>\n";
4501         }
4502 }
4503
4504 sub git_shortlog_body {
4505         # uses global variable $project
4506         my ($commitlist, $from, $to, $refs, $extra) = @_;
4507
4508         $from = 0 unless defined $from;
4509         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4510
4511         print "<table class=\"shortlog\">\n";
4512         my $alternate = 1;
4513         for (my $i = $from; $i <= $to; $i++) {
4514                 my %co = %{$commitlist->[$i]};
4515                 my $commit = $co{'id'};
4516                 my $ref = format_ref_marker($refs, $commit);
4517                 if ($alternate) {
4518                         print "<tr class=\"dark\">\n";
4519                 } else {
4520                         print "<tr class=\"light\">\n";
4521                 }
4522                 $alternate ^= 1;
4523                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4524                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4525                       format_author_html('td', \%co, 10) . "<td>";
4526                 print format_subject_html($co{'title'}, $co{'title_short'},
4527                                           href(action=>"commit", hash=>$commit), $ref);
4528                 print "</td>\n" .
4529                       "<td class=\"link\">" .
4530                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4531                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4532                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4533                 my $snapshot_links = format_snapshot_links($commit);
4534                 if (defined $snapshot_links) {
4535                         print " | " . $snapshot_links;
4536                 }
4537                 print "</td>\n" .
4538                       "</tr>\n";
4539         }
4540         if (defined $extra) {
4541                 print "<tr>\n" .
4542                       "<td colspan=\"4\">$extra</td>\n" .
4543                       "</tr>\n";
4544         }
4545         print "</table>\n";
4546 }
4547
4548 sub git_history_body {
4549         # Warning: assumes constant type (blob or tree) during history
4550         my ($commitlist, $from, $to, $refs, $extra,
4551             $file_name, $file_hash, $ftype) = @_;
4552
4553         $from = 0 unless defined $from;
4554         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4555
4556         print "<table class=\"history\">\n";
4557         my $alternate = 1;
4558         for (my $i = $from; $i <= $to; $i++) {
4559                 my %co = %{$commitlist->[$i]};
4560                 if (!%co) {
4561                         next;
4562                 }
4563                 my $commit = $co{'id'};
4564
4565                 my $ref = format_ref_marker($refs, $commit);
4566
4567                 if ($alternate) {
4568                         print "<tr class=\"dark\">\n";
4569                 } else {
4570                         print "<tr class=\"light\">\n";
4571                 }
4572                 $alternate ^= 1;
4573                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4574         # shortlog:   format_author_html('td', \%co, 10)
4575                       format_author_html('td', \%co, 15, 3) . "<td>";
4576                 # originally git_history used chop_str($co{'title'}, 50)
4577                 print format_subject_html($co{'title'}, $co{'title_short'},
4578                                           href(action=>"commit", hash=>$commit), $ref);
4579                 print "</td>\n" .
4580                       "<td class=\"link\">" .
4581                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4582                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4583
4584                 if ($ftype eq 'blob') {
4585                         my $blob_current = $file_hash;
4586                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4587                         if (defined $blob_current && defined $blob_parent &&
4588                                         $blob_current ne $blob_parent) {
4589                                 print " | " .
4590                                         $cgi->a({-href => href(action=>"blobdiff",
4591                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4592                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4593                                                                file_name=>$file_name)},
4594                                                 "diff to current");
4595                         }
4596                 }
4597                 print "</td>\n" .
4598                       "</tr>\n";
4599         }
4600         if (defined $extra) {
4601                 print "<tr>\n" .
4602                       "<td colspan=\"4\">$extra</td>\n" .
4603                       "</tr>\n";
4604         }
4605         print "</table>\n";
4606 }
4607
4608 sub git_tags_body {
4609         # uses global variable $project
4610         my ($taglist, $from, $to, $extra) = @_;
4611         $from = 0 unless defined $from;
4612         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4613
4614         print "<table class=\"tags\">\n";
4615         my $alternate = 1;
4616         for (my $i = $from; $i <= $to; $i++) {
4617                 my $entry = $taglist->[$i];
4618                 my %tag = %$entry;
4619                 my $comment = $tag{'subject'};
4620                 my $comment_short;
4621                 if (defined $comment) {
4622                         $comment_short = chop_str($comment, 30, 5);
4623                 }
4624                 if ($alternate) {
4625                         print "<tr class=\"dark\">\n";
4626                 } else {
4627                         print "<tr class=\"light\">\n";
4628                 }
4629                 $alternate ^= 1;
4630                 if (defined $tag{'age'}) {
4631                         print "<td><i>$tag{'age'}</i></td>\n";
4632                 } else {
4633                         print "<td></td>\n";
4634                 }
4635                 print "<td>" .
4636                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4637                                -class => "list name"}, esc_html($tag{'name'})) .
4638                       "</td>\n" .
4639                       "<td>";
4640                 if (defined $comment) {
4641                         print format_subject_html($comment, $comment_short,
4642                                                   href(action=>"tag", hash=>$tag{'id'}));
4643                 }
4644                 print "</td>\n" .
4645                       "<td class=\"selflink\">";
4646                 if ($tag{'type'} eq "tag") {
4647                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4648                 } else {
4649                         print "&nbsp;";
4650                 }
4651                 print "</td>\n" .
4652                       "<td class=\"link\">" . " | " .
4653                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4654                 if ($tag{'reftype'} eq "commit") {
4655                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4656                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4657                 } elsif ($tag{'reftype'} eq "blob") {
4658                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4659                 }
4660                 print "</td>\n" .
4661                       "</tr>";
4662         }
4663         if (defined $extra) {
4664                 print "<tr>\n" .
4665                       "<td colspan=\"5\">$extra</td>\n" .
4666                       "</tr>\n";
4667         }
4668         print "</table>\n";
4669 }
4670
4671 sub git_heads_body {
4672         # uses global variable $project
4673         my ($headlist, $head, $from, $to, $extra) = @_;
4674         $from = 0 unless defined $from;
4675         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4676
4677         print "<table class=\"heads\">\n";
4678         my $alternate = 1;
4679         for (my $i = $from; $i <= $to; $i++) {
4680                 my $entry = $headlist->[$i];
4681                 my %ref = %$entry;
4682                 my $curr = $ref{'id'} eq $head;
4683                 if ($alternate) {
4684                         print "<tr class=\"dark\">\n";
4685                 } else {
4686                         print "<tr class=\"light\">\n";
4687                 }
4688                 $alternate ^= 1;
4689                 print "<td><i>$ref{'age'}</i></td>\n" .
4690                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4691                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4692                                -class => "list name"},esc_html($ref{'name'})) .
4693                       "</td>\n" .
4694                       "<td class=\"link\">" .
4695                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4696                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4697                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4698                       "</td>\n" .
4699                       "</tr>";
4700         }
4701         if (defined $extra) {
4702                 print "<tr>\n" .
4703                       "<td colspan=\"3\">$extra</td>\n" .
4704                       "</tr>\n";
4705         }
4706         print "</table>\n";
4707 }
4708
4709 sub git_search_grep_body {
4710         my ($commitlist, $from, $to, $extra) = @_;
4711         $from = 0 unless defined $from;
4712         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4713
4714         print "<table class=\"commit_search\">\n";
4715         my $alternate = 1;
4716         for (my $i = $from; $i <= $to; $i++) {
4717                 my %co = %{$commitlist->[$i]};
4718                 if (!%co) {
4719                         next;
4720                 }
4721                 my $commit = $co{'id'};
4722                 if ($alternate) {
4723                         print "<tr class=\"dark\">\n";
4724                 } else {
4725                         print "<tr class=\"light\">\n";
4726                 }
4727                 $alternate ^= 1;
4728                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4729                       format_author_html('td', \%co, 15, 5) .
4730                       "<td>" .
4731                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4732                                -class => "list subject"},
4733                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4734                 my $comment = $co{'comment'};
4735                 foreach my $line (@$comment) {
4736                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4737                                 my ($lead, $match, $trail) = ($1, $2, $3);
4738                                 $match = chop_str($match, 70, 5, 'center');
4739                                 my $contextlen = int((80 - length($match))/2);
4740                                 $contextlen = 30 if ($contextlen > 30);
4741                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4742                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4743
4744                                 $lead  = esc_html($lead);
4745                                 $match = esc_html($match);
4746                                 $trail = esc_html($trail);
4747
4748                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4749                         }
4750                 }
4751                 print "</td>\n" .
4752                       "<td class=\"link\">" .
4753                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4754                       " | " .
4755                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4756                       " | " .
4757                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4758                 print "</td>\n" .
4759                       "</tr>\n";
4760         }
4761         if (defined $extra) {
4762                 print "<tr>\n" .
4763                       "<td colspan=\"3\">$extra</td>\n" .
4764                       "</tr>\n";
4765         }
4766         print "</table>\n";
4767 }
4768
4769 ## ======================================================================
4770 ## ======================================================================
4771 ## actions
4772
4773 sub git_project_list {
4774         my $order = $input_params{'order'};
4775         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4776                 die_error(400, "Unknown order parameter");
4777         }
4778
4779         my @list = git_get_projects_list();
4780         if (!@list) {
4781                 die_error(404, "No projects found");
4782         }
4783
4784         git_header_html();
4785         if (defined $home_text && -f $home_text) {
4786                 print "<div class=\"index_include\">\n";
4787                 insert_file($home_text);
4788                 print "</div>\n";
4789         }
4790         print $cgi->startform(-method => "get") .
4791               "<p class=\"projsearch\">Search:\n" .
4792               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4793               "</p>" .
4794               $cgi->end_form() . "\n";
4795         git_project_list_body(\@list, $order);
4796         git_footer_html();
4797 }
4798
4799 sub git_forks {
4800         my $order = $input_params{'order'};
4801         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4802                 die_error(400, "Unknown order parameter");
4803         }
4804
4805         my @list = git_get_projects_list($project);
4806         if (!@list) {
4807                 die_error(404, "No forks found");
4808         }
4809
4810         git_header_html();
4811         git_print_page_nav('','');
4812         git_print_header_div('summary', "$project forks");
4813         git_project_list_body(\@list, $order);
4814         git_footer_html();
4815 }
4816
4817 sub git_project_index {
4818         my @projects = git_get_projects_list($project);
4819
4820         print $cgi->header(
4821                 -type => 'text/plain',
4822                 -charset => 'utf-8',
4823                 -content_disposition => 'inline; filename="index.aux"');
4824
4825         foreach my $pr (@projects) {
4826                 if (!exists $pr->{'owner'}) {
4827                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4828                 }
4829
4830                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4831                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4832                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4833                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4834                 $path  =~ s/ /\+/g;
4835                 $owner =~ s/ /\+/g;
4836
4837                 print "$path $owner\n";
4838         }
4839 }
4840
4841 sub git_summary {
4842         my $descr = git_get_project_description($project) || "none";
4843         my %co = parse_commit("HEAD");
4844         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4845         my $head = $co{'id'};
4846
4847         my $owner = git_get_project_owner($project);
4848
4849         my $refs = git_get_references();
4850         # These get_*_list functions return one more to allow us to see if
4851         # there are more ...
4852         my @taglist  = git_get_tags_list(16);
4853         my @headlist = git_get_heads_list(16);
4854         my @forklist;
4855         my $check_forks = gitweb_check_feature('forks');
4856
4857         if ($check_forks) {
4858                 @forklist = git_get_projects_list($project);
4859         }
4860
4861         git_header_html();
4862         git_print_page_nav('summary','', $head);
4863
4864         print "<div class=\"title\">&nbsp;</div>\n";
4865         print "<table class=\"projects_list\">\n" .
4866               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4867               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4868         if (defined $cd{'rfc2822'}) {
4869                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4870         }
4871
4872         # use per project git URL list in $projectroot/$project/cloneurl
4873         # or make project git URL from git base URL and project name
4874         my $url_tag = "URL";
4875         my @url_list = git_get_project_url_list($project);
4876         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4877         foreach my $git_url (@url_list) {
4878                 next unless $git_url;
4879                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4880                 $url_tag = "";
4881         }
4882
4883         # Tag cloud
4884         my $show_ctags = gitweb_check_feature('ctags');
4885         if ($show_ctags) {
4886                 my $ctags = git_get_project_ctags($project);
4887                 my $cloud = git_populate_project_tagcloud($ctags);
4888                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4889                 print "</td>\n<td>" unless %$ctags;
4890                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4891                 print "</td>\n<td>" if %$ctags;
4892                 print git_show_project_tagcloud($cloud, 48);
4893                 print "</td></tr>";
4894         }
4895
4896         print "</table>\n";
4897
4898         # If XSS prevention is on, we don't include README.html.
4899         # TODO: Allow a readme in some safe format.
4900         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4901                 print "<div class=\"title\">readme</div>\n" .
4902                       "<div class=\"readme\">\n";
4903                 insert_file("$projectroot/$project/README.html");
4904                 print "\n</div>\n"; # class="readme"
4905         }
4906
4907         # we need to request one more than 16 (0..15) to check if
4908         # those 16 are all
4909         my @commitlist = $head ? parse_commits($head, 17) : ();
4910         if (@commitlist) {
4911                 git_print_header_div('shortlog');
4912                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4913                                   $#commitlist <=  15 ? undef :
4914                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4915         }
4916
4917         if (@taglist) {
4918                 git_print_header_div('tags');
4919                 git_tags_body(\@taglist, 0, 15,
4920                               $#taglist <=  15 ? undef :
4921                               $cgi->a({-href => href(action=>"tags")}, "..."));
4922         }
4923
4924         if (@headlist) {
4925                 git_print_header_div('heads');
4926                 git_heads_body(\@headlist, $head, 0, 15,
4927                                $#headlist <= 15 ? undef :
4928                                $cgi->a({-href => href(action=>"heads")}, "..."));
4929         }
4930
4931         if (@forklist) {
4932                 git_print_header_div('forks');
4933                 git_project_list_body(\@forklist, 'age', 0, 15,
4934                                       $#forklist <= 15 ? undef :
4935                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4936                                       'no_header');
4937         }
4938
4939         git_footer_html();
4940 }
4941
4942 sub git_tag {
4943         my $head = git_get_head_hash($project);
4944         git_header_html();
4945         git_print_page_nav('','', $head,undef,$head);
4946         my %tag = parse_tag($hash);
4947
4948         if (! %tag) {
4949                 die_error(404, "Unknown tag object");
4950         }
4951
4952         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4953         print "<div class=\"title_text\">\n" .
4954               "<table class=\"object_header\">\n" .
4955               "<tr>\n" .
4956               "<td>object</td>\n" .
4957               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4958                                $tag{'object'}) . "</td>\n" .
4959               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4960                                               $tag{'type'}) . "</td>\n" .
4961               "</tr>\n";
4962         if (defined($tag{'author'})) {
4963                 git_print_authorship_rows(\%tag, 'author');
4964         }
4965         print "</table>\n\n" .
4966               "</div>\n";
4967         print "<div class=\"page_body\">";
4968         my $comment = $tag{'comment'};
4969         foreach my $line (@$comment) {
4970                 chomp $line;
4971                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4972         }
4973         print "</div>\n";
4974         git_footer_html();
4975 }
4976
4977 sub git_blame_common {
4978         my $format = shift || 'porcelain';
4979         if ($format eq 'porcelain' && $cgi->param('js')) {
4980                 $format = 'incremental';
4981                 $action = 'blame_incremental'; # for page title etc
4982         }
4983
4984         # permissions
4985         gitweb_check_feature('blame')
4986                 or die_error(403, "Blame view not allowed");
4987
4988         # error checking
4989         die_error(400, "No file name given") unless $file_name;
4990         $hash_base ||= git_get_head_hash($project);
4991         die_error(404, "Couldn't find base commit") unless $hash_base;
4992         my %co = parse_commit($hash_base)
4993                 or die_error(404, "Commit not found");
4994         my $ftype = "blob";
4995         if (!defined $hash) {
4996                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4997                         or die_error(404, "Error looking up file");
4998         } else {
4999                 $ftype = git_get_type($hash);
5000                 if ($ftype !~ "blob") {
5001                         die_error(400, "Object is not a blob");
5002                 }
5003         }
5004
5005         my $fd;
5006         if ($format eq 'incremental') {
5007                 # get file contents (as base)
5008                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5009                         or die_error(500, "Open git-cat-file failed");
5010         } elsif ($format eq 'data') {
5011                 # run git-blame --incremental
5012                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5013                         $hash_base, "--", $file_name
5014                         or die_error(500, "Open git-blame --incremental failed");
5015         } else {
5016                 # run git-blame --porcelain
5017                 open $fd, "-|", git_cmd(), "blame", '-p',
5018                         $hash_base, '--', $file_name
5019                         or die_error(500, "Open git-blame --porcelain failed");
5020         }
5021
5022         # incremental blame data returns early
5023         if ($format eq 'data') {
5024                 print $cgi->header(
5025                         -type=>"text/plain", -charset => "utf-8",
5026                         -status=> "200 OK");
5027                 local $| = 1; # output autoflush
5028                 print while <$fd>;
5029                 close $fd
5030                         or print "ERROR $!\n";
5031
5032                 print 'END';
5033                 if (defined $t0 && gitweb_check_feature('timed')) {
5034                         print ' '.
5035                               Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
5036                               ' '.$number_of_git_cmds;
5037                 }
5038                 print "\n";
5039
5040                 return;
5041         }
5042
5043         # page header
5044         git_header_html();
5045         my $formats_nav =
5046                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5047                         "blob") .
5048                 " | ";
5049         if ($format eq 'incremental') {
5050                 $formats_nav .=
5051                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5052                                 "blame") . " (non-incremental)";
5053         } else {
5054                 $formats_nav .=
5055                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5056                                 "blame") . " (incremental)";
5057         }
5058         $formats_nav .=
5059                 " | " .
5060                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5061                         "history") .
5062                 " | " .
5063                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5064                         "HEAD");
5065         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5066         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5067         git_print_page_path($file_name, $ftype, $hash_base);
5068
5069         # page body
5070         if ($format eq 'incremental') {
5071                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5072                       "This page requires JavaScript to run.\n Use ".
5073                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5074                               'this page').
5075                       " instead.\n".
5076                       "</b></center></div>\n</noscript>\n";
5077
5078                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5079         }
5080
5081         print qq!<div class="page_body">\n!;
5082         print qq!<div id="progress_info">... / ...</div>\n!
5083                 if ($format eq 'incremental');
5084         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5085               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5086               qq!<thead>\n!.
5087               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5088               qq!</thead>\n!.
5089               qq!<tbody>\n!;
5090
5091         my @rev_color = qw(light dark);
5092         my $num_colors = scalar(@rev_color);
5093         my $current_color = 0;
5094
5095         if ($format eq 'incremental') {
5096                 my $color_class = $rev_color[$current_color];
5097
5098                 #contents of a file
5099                 my $linenr = 0;
5100         LINE:
5101                 while (my $line = <$fd>) {
5102                         chomp $line;
5103                         $linenr++;
5104
5105                         print qq!<tr id="l$linenr" class="$color_class">!.
5106                               qq!<td class="sha1"><a href=""> </a></td>!.
5107                               qq!<td class="linenr">!.
5108                               qq!<a class="linenr" href="">$linenr</a></td>!;
5109                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5110                         print qq!</tr>\n!;
5111                 }
5112
5113         } else { # porcelain, i.e. ordinary blame
5114                 my %metainfo = (); # saves information about commits
5115
5116                 # blame data
5117         LINE:
5118                 while (my $line = <$fd>) {
5119                         chomp $line;
5120                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5121                         # no <lines in group> for subsequent lines in group of lines
5122                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5123                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5124                         if (!exists $metainfo{$full_rev}) {
5125                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5126                         }
5127                         my $meta = $metainfo{$full_rev};
5128                         my $data;
5129                         while ($data = <$fd>) {
5130                                 chomp $data;
5131                                 last if ($data =~ s/^\t//); # contents of line
5132                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5133                                         $meta->{$1} = $2 unless exists $meta->{$1};
5134                                 }
5135                                 if ($data =~ /^previous /) {
5136                                         $meta->{'nprevious'}++;
5137                                 }
5138                         }
5139                         my $short_rev = substr($full_rev, 0, 8);
5140                         my $author = $meta->{'author'};
5141                         my %date =
5142                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5143                         my $date = $date{'iso-tz'};
5144                         if ($group_size) {
5145                                 $current_color = ($current_color + 1) % $num_colors;
5146                         }
5147                         my $tr_class = $rev_color[$current_color];
5148                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5149                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5150                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5151                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5152                         if ($group_size) {
5153                                 print "<td class=\"sha1\"";
5154                                 print " title=\"". esc_html($author) . ", $date\"";
5155                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5156                                 print ">";
5157                                 print $cgi->a({-href => href(action=>"commit",
5158                                                              hash=>$full_rev,
5159                                                              file_name=>$file_name)},
5160                                               esc_html($short_rev));
5161                                 if ($group_size >= 2) {
5162                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5163                                         if (@author_initials) {
5164                                                 print "<br />" .
5165                                                       esc_html(join('', @author_initials));
5166                                                 #           or join('.', ...)
5167                                         }
5168                                 }
5169                                 print "</td>\n";
5170                         }
5171                         # 'previous' <sha1 of parent commit> <filename at commit>
5172                         if (exists $meta->{'previous'} &&
5173                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5174                                 $meta->{'parent'} = $1;
5175                                 $meta->{'file_parent'} = unquote($2);
5176                         }
5177                         my $linenr_commit =
5178                                 exists($meta->{'parent'}) ?
5179                                 $meta->{'parent'} : $full_rev;
5180                         my $linenr_filename =
5181                                 exists($meta->{'file_parent'}) ?
5182                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5183                         my $blamed = href(action => 'blame',
5184                                           file_name => $linenr_filename,
5185                                           hash_base => $linenr_commit);
5186                         print "<td class=\"linenr\">";
5187                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5188                                         -class => "linenr" },
5189                                       esc_html($lineno));
5190                         print "</td>";
5191                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5192                         print "</tr>\n";
5193                 } # end while
5194
5195         }
5196
5197         # footer
5198         print "</tbody>\n".
5199               "</table>\n"; # class="blame"
5200         print "</div>\n";   # class="blame_body"
5201         close $fd
5202                 or print "Reading blob failed\n";
5203
5204         git_footer_html();
5205 }
5206
5207 sub git_blame {
5208         git_blame_common();
5209 }
5210
5211 sub git_blame_incremental {
5212         git_blame_common('incremental');
5213 }
5214
5215 sub git_blame_data {
5216         git_blame_common('data');
5217 }
5218
5219 sub git_tags {
5220         my $head = git_get_head_hash($project);
5221         git_header_html();
5222         git_print_page_nav('','', $head,undef,$head);
5223         git_print_header_div('summary', $project);
5224
5225         my @tagslist = git_get_tags_list();
5226         if (@tagslist) {
5227                 git_tags_body(\@tagslist);
5228         }
5229         git_footer_html();
5230 }
5231
5232 sub git_heads {
5233         my $head = git_get_head_hash($project);
5234         git_header_html();
5235         git_print_page_nav('','', $head,undef,$head);
5236         git_print_header_div('summary', $project);
5237
5238         my @headslist = git_get_heads_list();
5239         if (@headslist) {
5240                 git_heads_body(\@headslist, $head);
5241         }
5242         git_footer_html();
5243 }
5244
5245 sub git_blob_plain {
5246         my $type = shift;
5247         my $expires;
5248
5249         if (!defined $hash) {
5250                 if (defined $file_name) {
5251                         my $base = $hash_base || git_get_head_hash($project);
5252                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5253                                 or die_error(404, "Cannot find file");
5254                 } else {
5255                         die_error(400, "No file name defined");
5256                 }
5257         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5258                 # blobs defined by non-textual hash id's can be cached
5259                 $expires = "+1d";
5260         }
5261
5262         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5263                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5264
5265         # content-type (can include charset)
5266         $type = blob_contenttype($fd, $file_name, $type);
5267
5268         # "save as" filename, even when no $file_name is given
5269         my $save_as = "$hash";
5270         if (defined $file_name) {
5271                 $save_as = $file_name;
5272         } elsif ($type =~ m/^text\//) {
5273                 $save_as .= '.txt';
5274         }
5275
5276         # With XSS prevention on, blobs of all types except a few known safe
5277         # ones are served with "Content-Disposition: attachment" to make sure
5278         # they don't run in our security domain.  For certain image types,
5279         # blob view writes an <img> tag referring to blob_plain view, and we
5280         # want to be sure not to break that by serving the image as an
5281         # attachment (though Firefox 3 doesn't seem to care).
5282         my $sandbox = $prevent_xss &&
5283                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5284
5285         print $cgi->header(
5286                 -type => $type,
5287                 -expires => $expires,
5288                 -content_disposition =>
5289                         ($sandbox ? 'attachment' : 'inline')
5290                         . '; filename="' . $save_as . '"');
5291         local $/ = undef;
5292         binmode STDOUT, ':raw';
5293         print <$fd>;
5294         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5295         close $fd;
5296 }
5297
5298 sub git_blob {
5299         my $expires;
5300
5301         if (!defined $hash) {
5302                 if (defined $file_name) {
5303                         my $base = $hash_base || git_get_head_hash($project);
5304                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5305                                 or die_error(404, "Cannot find file");
5306                 } else {
5307                         die_error(400, "No file name defined");
5308                 }
5309         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5310                 # blobs defined by non-textual hash id's can be cached
5311                 $expires = "+1d";
5312         }
5313
5314         my $have_blame = gitweb_check_feature('blame');
5315         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5316                 or die_error(500, "Couldn't cat $file_name, $hash");
5317         my $mimetype = blob_mimetype($fd, $file_name);
5318         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5319                 close $fd;
5320                 return git_blob_plain($mimetype);
5321         }
5322         # we can have blame only for text/* mimetype
5323         $have_blame &&= ($mimetype =~ m!^text/!);
5324
5325         git_header_html(undef, $expires);
5326         my $formats_nav = '';
5327         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5328                 if (defined $file_name) {
5329                         if ($have_blame) {
5330                                 $formats_nav .=
5331                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5332                                                 "blame") .
5333                                         " | ";
5334                         }
5335                         $formats_nav .=
5336                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5337                                         "history") .
5338                                 " | " .
5339                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5340                                         "raw") .
5341                                 " | " .
5342                                 $cgi->a({-href => href(action=>"blob",
5343                                                        hash_base=>"HEAD", file_name=>$file_name)},
5344                                         "HEAD");
5345                 } else {
5346                         $formats_nav .=
5347                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5348                                         "raw");
5349                 }
5350                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5351                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5352         } else {
5353                 print "<div class=\"page_nav\">\n" .
5354                       "<br/><br/></div>\n" .
5355                       "<div class=\"title\">$hash</div>\n";
5356         }
5357         git_print_page_path($file_name, "blob", $hash_base);
5358         print "<div class=\"page_body\">\n";
5359         if ($mimetype =~ m!^image/!) {
5360                 print qq!<img type="$mimetype"!;
5361                 if ($file_name) {
5362                         print qq! alt="$file_name" title="$file_name"!;
5363                 }
5364                 print qq! src="! .
5365                       href(action=>"blob_plain", hash=>$hash,
5366                            hash_base=>$hash_base, file_name=>$file_name) .
5367                       qq!" />\n!;
5368         } else {
5369                 my $nr;
5370                 while (my $line = <$fd>) {
5371                         chomp $line;
5372                         $nr++;
5373                         $line = untabify($line);
5374                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"" . href(-replay => 1)
5375                                 . "#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
5376                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
5377                 }
5378         }
5379         close $fd
5380                 or print "Reading blob failed.\n";
5381         print "</div>";
5382         git_footer_html();
5383 }
5384
5385 sub git_tree {
5386         if (!defined $hash_base) {
5387                 $hash_base = "HEAD";
5388         }
5389         if (!defined $hash) {
5390                 if (defined $file_name) {
5391                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5392                 } else {
5393                         $hash = $hash_base;
5394                 }
5395         }
5396         die_error(404, "No such tree") unless defined($hash);
5397
5398         my $show_sizes = gitweb_check_feature('show-sizes');
5399         my $have_blame = gitweb_check_feature('blame');
5400
5401         my @entries = ();
5402         {
5403                 local $/ = "\0";
5404                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5405                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5406                         or die_error(500, "Open git-ls-tree failed");
5407                 @entries = map { chomp; $_ } <$fd>;
5408                 close $fd
5409                         or die_error(404, "Reading tree failed");
5410         }
5411
5412         my $refs = git_get_references();
5413         my $ref = format_ref_marker($refs, $hash_base);
5414         git_header_html();
5415         my $basedir = '';
5416         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5417                 my @views_nav = ();
5418                 if (defined $file_name) {
5419                         push @views_nav,
5420                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5421                                         "history"),
5422                                 $cgi->a({-href => href(action=>"tree",
5423                                                        hash_base=>"HEAD", file_name=>$file_name)},
5424                                         "HEAD"),
5425                 }
5426                 my $snapshot_links = format_snapshot_links($hash);
5427                 if (defined $snapshot_links) {
5428                         # FIXME: Should be available when we have no hash base as well.
5429                         push @views_nav, $snapshot_links;
5430                 }
5431                 git_print_page_nav('tree','', $hash_base, undef, undef,
5432                                    join(' | ', @views_nav));
5433                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5434         } else {
5435                 undef $hash_base;
5436                 print "<div class=\"page_nav\">\n";
5437                 print "<br/><br/></div>\n";
5438                 print "<div class=\"title\">$hash</div>\n";
5439         }
5440         if (defined $file_name) {
5441                 $basedir = $file_name;
5442                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5443                         $basedir .= '/';
5444                 }
5445                 git_print_page_path($file_name, 'tree', $hash_base);
5446         }
5447         print "<div class=\"page_body\">\n";
5448         print "<table class=\"tree\">\n";
5449         my $alternate = 1;
5450         # '..' (top directory) link if possible
5451         if (defined $hash_base &&
5452             defined $file_name && $file_name =~ m![^/]+$!) {
5453                 if ($alternate) {
5454                         print "<tr class=\"dark\">\n";
5455                 } else {
5456                         print "<tr class=\"light\">\n";
5457                 }
5458                 $alternate ^= 1;
5459
5460                 my $up = $file_name;
5461                 $up =~ s!/?[^/]+$!!;
5462                 undef $up unless $up;
5463                 # based on git_print_tree_entry
5464                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5465                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5466                 print '<td class="list">';
5467                 print $cgi->a({-href => href(action=>"tree",
5468                                              hash_base=>$hash_base,
5469                                              file_name=>$up)},
5470                               "..");
5471                 print "</td>\n";
5472                 print "<td class=\"link\"></td>\n";
5473
5474                 print "</tr>\n";
5475         }
5476         foreach my $line (@entries) {
5477                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5478
5479                 if ($alternate) {
5480                         print "<tr class=\"dark\">\n";
5481                 } else {
5482                         print "<tr class=\"light\">\n";
5483                 }
5484                 $alternate ^= 1;
5485
5486                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5487
5488                 print "</tr>\n";
5489         }
5490         print "</table>\n" .
5491               "</div>";
5492         git_footer_html();
5493 }
5494
5495 sub snapshot_name {
5496         my ($project, $hash) = @_;
5497
5498         # path/to/project.git  -> project
5499         # path/to/project/.git -> project
5500         my $name = to_utf8($project);
5501         $name =~ s,([^/])/*\.git$,$1,;
5502         $name = basename($name);
5503         # sanitize name
5504         $name =~ s/[[:cntrl:]]/?/g;
5505
5506         my $ver = $hash;
5507         if ($hash =~ /^[0-9a-fA-F]+$/) {
5508                 # shorten SHA-1 hash
5509                 my $full_hash = git_get_full_hash($project, $hash);
5510                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
5511                         $ver = git_get_short_hash($project, $hash);
5512                 }
5513         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
5514                 # tags don't need shortened SHA-1 hash
5515                 $ver = $1;
5516         } else {
5517                 # branches and other need shortened SHA-1 hash
5518                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
5519                         $ver = $1;
5520                 }
5521                 $ver .= '-' . git_get_short_hash($project, $hash);
5522         }
5523         # in case of hierarchical branch names
5524         $ver =~ s!/!.!g;
5525
5526         # name = project-version_string
5527         $name = "$name-$ver";
5528
5529         return wantarray ? ($name, $name) : $name;
5530 }
5531
5532 sub git_snapshot {
5533         my $format = $input_params{'snapshot_format'};
5534         if (!@snapshot_fmts) {
5535                 die_error(403, "Snapshots not allowed");
5536         }
5537         # default to first supported snapshot format
5538         $format ||= $snapshot_fmts[0];
5539         if ($format !~ m/^[a-z0-9]+$/) {
5540                 die_error(400, "Invalid snapshot format parameter");
5541         } elsif (!exists($known_snapshot_formats{$format})) {
5542                 die_error(400, "Unknown snapshot format");
5543         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5544                 die_error(403, "Snapshot format not allowed");
5545         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5546                 die_error(403, "Unsupported snapshot format");
5547         }
5548
5549         my $type = git_get_type("$hash^{}");
5550         if (!$type) {
5551                 die_error(404, 'Object does not exist');
5552         }  elsif ($type eq 'blob') {
5553                 die_error(400, 'Object is not a tree-ish');
5554         }
5555
5556         my ($name, $prefix) = snapshot_name($project, $hash);
5557         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
5558         my $cmd = quote_command(
5559                 git_cmd(), 'archive',
5560                 "--format=$known_snapshot_formats{$format}{'format'}",
5561                 "--prefix=$prefix/", $hash);
5562         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5563                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5564         }
5565
5566         $filename =~ s/(["\\])/\\$1/g;
5567         print $cgi->header(
5568                 -type => $known_snapshot_formats{$format}{'type'},
5569                 -content_disposition => 'inline; filename="' . $filename . '"',
5570                 -status => '200 OK');
5571
5572         open my $fd, "-|", $cmd
5573                 or die_error(500, "Execute git-archive failed");
5574         binmode STDOUT, ':raw';
5575         print <$fd>;
5576         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5577         close $fd;
5578 }
5579
5580 sub git_log_generic {
5581         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
5582
5583         my $head = git_get_head_hash($project);
5584         if (!defined $base) {
5585                 $base = $head;
5586         }
5587         if (!defined $page) {
5588                 $page = 0;
5589         }
5590         my $refs = git_get_references();
5591
5592         my $commit_hash = $base;
5593         if (defined $parent) {
5594                 $commit_hash = "$parent..$base";
5595         }
5596         my @commitlist =
5597                 parse_commits($commit_hash, 101, (100 * $page),
5598                               defined $file_name ? ($file_name, "--full-history") : ());
5599
5600         my $ftype;
5601         if (!defined $file_hash && defined $file_name) {
5602                 # some commits could have deleted file in question,
5603                 # and not have it in tree, but one of them has to have it
5604                 for (my $i = 0; $i < @commitlist; $i++) {
5605                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5606                         last if defined $file_hash;
5607                 }
5608         }
5609         if (defined $file_hash) {
5610                 $ftype = git_get_type($file_hash);
5611         }
5612         if (defined $file_name && !defined $ftype) {
5613                 die_error(500, "Unknown type of object");
5614         }
5615         my %co;
5616         if (defined $file_name) {
5617                 %co = parse_commit($base)
5618                         or die_error(404, "Unknown commit object");
5619         }
5620
5621
5622         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
5623         my $next_link = '';
5624         if ($#commitlist >= 100) {
5625                 $next_link =
5626                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5627                                  -accesskey => "n", -title => "Alt-n"}, "next");
5628         }
5629         my $patch_max = gitweb_get_feature('patches');
5630         if ($patch_max && !defined $file_name) {
5631                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5632                         $paging_nav .= " &sdot; " .
5633                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5634                                         "patches");
5635                 }
5636         }
5637
5638         git_header_html();
5639         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
5640         if (defined $file_name) {
5641                 git_print_header_div('commit', esc_html($co{'title'}), $base);
5642         } else {
5643                 git_print_header_div('summary', $project)
5644         }
5645         git_print_page_path($file_name, $ftype, $hash_base)
5646                 if (defined $file_name);
5647
5648         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
5649                      $file_name, $file_hash, $ftype);
5650
5651         git_footer_html();
5652 }
5653
5654 sub git_log {
5655         git_log_generic('log', \&git_log_body,
5656                         $hash, $hash_parent);
5657 }
5658
5659 sub git_commit {
5660         $hash ||= $hash_base || "HEAD";
5661         my %co = parse_commit($hash)
5662             or die_error(404, "Unknown commit object");
5663
5664         my $parent  = $co{'parent'};
5665         my $parents = $co{'parents'}; # listref
5666
5667         # we need to prepare $formats_nav before any parameter munging
5668         my $formats_nav;
5669         if (!defined $parent) {
5670                 # --root commitdiff
5671                 $formats_nav .= '(initial)';
5672         } elsif (@$parents == 1) {
5673                 # single parent commit
5674                 $formats_nav .=
5675                         '(parent: ' .
5676                         $cgi->a({-href => href(action=>"commit",
5677                                                hash=>$parent)},
5678                                 esc_html(substr($parent, 0, 7))) .
5679                         ')';
5680         } else {
5681                 # merge commit
5682                 $formats_nav .=
5683                         '(merge: ' .
5684                         join(' ', map {
5685                                 $cgi->a({-href => href(action=>"commit",
5686                                                        hash=>$_)},
5687                                         esc_html(substr($_, 0, 7)));
5688                         } @$parents ) .
5689                         ')';
5690         }
5691         if (gitweb_check_feature('patches') && @$parents <= 1) {
5692                 $formats_nav .= " | " .
5693                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5694                                 "patch");
5695         }
5696
5697         if (!defined $parent) {
5698                 $parent = "--root";
5699         }
5700         my @difftree;
5701         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5702                 @diff_opts,
5703                 (@$parents <= 1 ? $parent : '-c'),
5704                 $hash, "--"
5705                 or die_error(500, "Open git-diff-tree failed");
5706         @difftree = map { chomp; $_ } <$fd>;
5707         close $fd or die_error(404, "Reading git-diff-tree failed");
5708
5709         # non-textual hash id's can be cached
5710         my $expires;
5711         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5712                 $expires = "+1d";
5713         }
5714         my $refs = git_get_references();
5715         my $ref = format_ref_marker($refs, $co{'id'});
5716
5717         git_header_html(undef, $expires);
5718         git_print_page_nav('commit', '',
5719                            $hash, $co{'tree'}, $hash,
5720                            $formats_nav);
5721
5722         if (defined $co{'parent'}) {
5723                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5724         } else {
5725                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5726         }
5727         print "<div class=\"title_text\">\n" .
5728               "<table class=\"object_header\">\n";
5729         git_print_authorship_rows(\%co);
5730         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5731         print "<tr>" .
5732               "<td>tree</td>" .
5733               "<td class=\"sha1\">" .
5734               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5735                        class => "list"}, $co{'tree'}) .
5736               "</td>" .
5737               "<td class=\"link\">" .
5738               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5739                       "tree");
5740         my $snapshot_links = format_snapshot_links($hash);
5741         if (defined $snapshot_links) {
5742                 print " | " . $snapshot_links;
5743         }
5744         print "</td>" .
5745               "</tr>\n";
5746
5747         foreach my $par (@$parents) {
5748                 print "<tr>" .
5749                       "<td>parent</td>" .
5750                       "<td class=\"sha1\">" .
5751                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5752                                class => "list"}, $par) .
5753                       "</td>" .
5754                       "<td class=\"link\">" .
5755                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5756                       " | " .
5757                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5758                       "</td>" .
5759                       "</tr>\n";
5760         }
5761         print "</table>".
5762               "</div>\n";
5763
5764         print "<div class=\"page_body\">\n";
5765         git_print_log($co{'comment'});
5766         print "</div>\n";
5767
5768         git_difftree_body(\@difftree, $hash, @$parents);
5769
5770         git_footer_html();
5771 }
5772
5773 sub git_object {
5774         # object is defined by:
5775         # - hash or hash_base alone
5776         # - hash_base and file_name
5777         my $type;
5778
5779         # - hash or hash_base alone
5780         if ($hash || ($hash_base && !defined $file_name)) {
5781                 my $object_id = $hash || $hash_base;
5782
5783                 open my $fd, "-|", quote_command(
5784                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5785                         or die_error(404, "Object does not exist");
5786                 $type = <$fd>;
5787                 chomp $type;
5788                 close $fd
5789                         or die_error(404, "Object does not exist");
5790
5791         # - hash_base and file_name
5792         } elsif ($hash_base && defined $file_name) {
5793                 $file_name =~ s,/+$,,;
5794
5795                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5796                         or die_error(404, "Base object does not exist");
5797
5798                 # here errors should not hapen
5799                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5800                         or die_error(500, "Open git-ls-tree failed");
5801                 my $line = <$fd>;
5802                 close $fd;
5803
5804                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5805                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5806                         die_error(404, "File or directory for given base does not exist");
5807                 }
5808                 $type = $2;
5809                 $hash = $3;
5810         } else {
5811                 die_error(400, "Not enough information to find object");
5812         }
5813
5814         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5815                                           hash=>$hash, hash_base=>$hash_base,
5816                                           file_name=>$file_name),
5817                              -status => '302 Found');
5818 }
5819
5820 sub git_blobdiff {
5821         my $format = shift || 'html';
5822
5823         my $fd;
5824         my @difftree;
5825         my %diffinfo;
5826         my $expires;
5827
5828         # preparing $fd and %diffinfo for git_patchset_body
5829         # new style URI
5830         if (defined $hash_base && defined $hash_parent_base) {
5831                 if (defined $file_name) {
5832                         # read raw output
5833                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5834                                 $hash_parent_base, $hash_base,
5835                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5836                                 or die_error(500, "Open git-diff-tree failed");
5837                         @difftree = map { chomp; $_ } <$fd>;
5838                         close $fd
5839                                 or die_error(404, "Reading git-diff-tree failed");
5840                         @difftree
5841                                 or die_error(404, "Blob diff not found");
5842
5843                 } elsif (defined $hash &&
5844                          $hash =~ /[0-9a-fA-F]{40}/) {
5845                         # try to find filename from $hash
5846
5847                         # read filtered raw output
5848                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5849                                 $hash_parent_base, $hash_base, "--"
5850                                 or die_error(500, "Open git-diff-tree failed");
5851                         @difftree =
5852                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5853                                 # $hash == to_id
5854                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5855                                 map { chomp; $_ } <$fd>;
5856                         close $fd
5857                                 or die_error(404, "Reading git-diff-tree failed");
5858                         @difftree
5859                                 or die_error(404, "Blob diff not found");
5860
5861                 } else {
5862                         die_error(400, "Missing one of the blob diff parameters");
5863                 }
5864
5865                 if (@difftree > 1) {
5866                         die_error(400, "Ambiguous blob diff specification");
5867                 }
5868
5869                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5870                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5871                 $file_name   ||= $diffinfo{'to_file'};
5872
5873                 $hash_parent ||= $diffinfo{'from_id'};
5874                 $hash        ||= $diffinfo{'to_id'};
5875
5876                 # non-textual hash id's can be cached
5877                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5878                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5879                         $expires = '+1d';
5880                 }
5881
5882                 # open patch output
5883                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5884                         '-p', ($format eq 'html' ? "--full-index" : ()),
5885                         $hash_parent_base, $hash_base,
5886                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5887                         or die_error(500, "Open git-diff-tree failed");
5888         }
5889
5890         # old/legacy style URI -- not generated anymore since 1.4.3.
5891         if (!%diffinfo) {
5892                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5893         }
5894
5895         # header
5896         if ($format eq 'html') {
5897                 my $formats_nav =
5898                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5899                                 "raw");
5900                 git_header_html(undef, $expires);
5901                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5902                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5903                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5904                 } else {
5905                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5906                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5907                 }
5908                 if (defined $file_name) {
5909                         git_print_page_path($file_name, "blob", $hash_base);
5910                 } else {
5911                         print "<div class=\"page_path\"></div>\n";
5912                 }
5913
5914         } elsif ($format eq 'plain') {
5915                 print $cgi->header(
5916                         -type => 'text/plain',
5917                         -charset => 'utf-8',
5918                         -expires => $expires,
5919                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5920
5921                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5922
5923         } else {
5924                 die_error(400, "Unknown blobdiff format");
5925         }
5926
5927         # patch
5928         if ($format eq 'html') {
5929                 print "<div class=\"page_body\">\n";
5930
5931                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5932                 close $fd;
5933
5934                 print "</div>\n"; # class="page_body"
5935                 git_footer_html();
5936
5937         } else {
5938                 while (my $line = <$fd>) {
5939                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5940                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5941
5942                         print $line;
5943
5944                         last if $line =~ m!^\+\+\+!;
5945                 }
5946                 local $/ = undef;
5947                 print <$fd>;
5948                 close $fd;
5949         }
5950 }
5951
5952 sub git_blobdiff_plain {
5953         git_blobdiff('plain');
5954 }
5955
5956 sub git_commitdiff {
5957         my %params = @_;
5958         my $format = $params{-format} || 'html';
5959
5960         my ($patch_max) = gitweb_get_feature('patches');
5961         if ($format eq 'patch') {
5962                 die_error(403, "Patch view not allowed") unless $patch_max;
5963         }
5964
5965         $hash ||= $hash_base || "HEAD";
5966         my %co = parse_commit($hash)
5967             or die_error(404, "Unknown commit object");
5968
5969         # choose format for commitdiff for merge
5970         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5971                 $hash_parent = '--cc';
5972         }
5973         # we need to prepare $formats_nav before almost any parameter munging
5974         my $formats_nav;
5975         if ($format eq 'html') {
5976                 $formats_nav =
5977                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5978                                 "raw");
5979                 if ($patch_max && @{$co{'parents'}} <= 1) {
5980                         $formats_nav .= " | " .
5981                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5982                                         "patch");
5983                 }
5984
5985                 if (defined $hash_parent &&
5986                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5987                         # commitdiff with two commits given
5988                         my $hash_parent_short = $hash_parent;
5989                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5990                                 $hash_parent_short = substr($hash_parent, 0, 7);
5991                         }
5992                         $formats_nav .=
5993                                 ' (from';
5994                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5995                                 if ($co{'parents'}[$i] eq $hash_parent) {
5996                                         $formats_nav .= ' parent ' . ($i+1);
5997                                         last;
5998                                 }
5999                         }
6000                         $formats_nav .= ': ' .
6001                                 $cgi->a({-href => href(action=>"commitdiff",
6002                                                        hash=>$hash_parent)},
6003                                         esc_html($hash_parent_short)) .
6004                                 ')';
6005                 } elsif (!$co{'parent'}) {
6006                         # --root commitdiff
6007                         $formats_nav .= ' (initial)';
6008                 } elsif (scalar @{$co{'parents'}} == 1) {
6009                         # single parent commit
6010                         $formats_nav .=
6011                                 ' (parent: ' .
6012                                 $cgi->a({-href => href(action=>"commitdiff",
6013                                                        hash=>$co{'parent'})},
6014                                         esc_html(substr($co{'parent'}, 0, 7))) .
6015                                 ')';
6016                 } else {
6017                         # merge commit
6018                         if ($hash_parent eq '--cc') {
6019                                 $formats_nav .= ' | ' .
6020                                         $cgi->a({-href => href(action=>"commitdiff",
6021                                                                hash=>$hash, hash_parent=>'-c')},
6022                                                 'combined');
6023                         } else { # $hash_parent eq '-c'
6024                                 $formats_nav .= ' | ' .
6025                                         $cgi->a({-href => href(action=>"commitdiff",
6026                                                                hash=>$hash, hash_parent=>'--cc')},
6027                                                 'compact');
6028                         }
6029                         $formats_nav .=
6030                                 ' (merge: ' .
6031                                 join(' ', map {
6032                                         $cgi->a({-href => href(action=>"commitdiff",
6033                                                                hash=>$_)},
6034                                                 esc_html(substr($_, 0, 7)));
6035                                 } @{$co{'parents'}} ) .
6036                                 ')';
6037                 }
6038         }
6039
6040         my $hash_parent_param = $hash_parent;
6041         if (!defined $hash_parent_param) {
6042                 # --cc for multiple parents, --root for parentless
6043                 $hash_parent_param =
6044                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6045         }
6046
6047         # read commitdiff
6048         my $fd;
6049         my @difftree;
6050         if ($format eq 'html') {
6051                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6052                         "--no-commit-id", "--patch-with-raw", "--full-index",
6053                         $hash_parent_param, $hash, "--"
6054                         or die_error(500, "Open git-diff-tree failed");
6055
6056                 while (my $line = <$fd>) {
6057                         chomp $line;
6058                         # empty line ends raw part of diff-tree output
6059                         last unless $line;
6060                         push @difftree, scalar parse_difftree_raw_line($line);
6061                 }
6062
6063         } elsif ($format eq 'plain') {
6064                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6065                         '-p', $hash_parent_param, $hash, "--"
6066                         or die_error(500, "Open git-diff-tree failed");
6067         } elsif ($format eq 'patch') {
6068                 # For commit ranges, we limit the output to the number of
6069                 # patches specified in the 'patches' feature.
6070                 # For single commits, we limit the output to a single patch,
6071                 # diverging from the git-format-patch default.
6072                 my @commit_spec = ();
6073                 if ($hash_parent) {
6074                         if ($patch_max > 0) {
6075                                 push @commit_spec, "-$patch_max";
6076                         }
6077                         push @commit_spec, '-n', "$hash_parent..$hash";
6078                 } else {
6079                         if ($params{-single}) {
6080                                 push @commit_spec, '-1';
6081                         } else {
6082                                 if ($patch_max > 0) {
6083                                         push @commit_spec, "-$patch_max";
6084                                 }
6085                                 push @commit_spec, "-n";
6086                         }
6087                         push @commit_spec, '--root', $hash;
6088                 }
6089                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
6090                         '--stdout', @commit_spec
6091                         or die_error(500, "Open git-format-patch failed");
6092         } else {
6093                 die_error(400, "Unknown commitdiff format");
6094         }
6095
6096         # non-textual hash id's can be cached
6097         my $expires;
6098         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6099                 $expires = "+1d";
6100         }
6101
6102         # write commit message
6103         if ($format eq 'html') {
6104                 my $refs = git_get_references();
6105                 my $ref = format_ref_marker($refs, $co{'id'});
6106
6107                 git_header_html(undef, $expires);
6108                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6109                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6110                 print "<div class=\"title_text\">\n" .
6111                       "<table class=\"object_header\">\n";
6112                 git_print_authorship_rows(\%co);
6113                 print "</table>".
6114                       "</div>\n";
6115                 print "<div class=\"page_body\">\n";
6116                 if (@{$co{'comment'}} > 1) {
6117                         print "<div class=\"log\">\n";
6118                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6119                         print "</div>\n"; # class="log"
6120                 }
6121
6122         } elsif ($format eq 'plain') {
6123                 my $refs = git_get_references("tags");
6124                 my $tagname = git_get_rev_name_tags($hash);
6125                 my $filename = basename($project) . "-$hash.patch";
6126
6127                 print $cgi->header(
6128                         -type => 'text/plain',
6129                         -charset => 'utf-8',
6130                         -expires => $expires,
6131                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6132                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6133                 print "From: " . to_utf8($co{'author'}) . "\n";
6134                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6135                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6136
6137                 print "X-Git-Tag: $tagname\n" if $tagname;
6138                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6139
6140                 foreach my $line (@{$co{'comment'}}) {
6141                         print to_utf8($line) . "\n";
6142                 }
6143                 print "---\n\n";
6144         } elsif ($format eq 'patch') {
6145                 my $filename = basename($project) . "-$hash.patch";
6146
6147                 print $cgi->header(
6148                         -type => 'text/plain',
6149                         -charset => 'utf-8',
6150                         -expires => $expires,
6151                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6152         }
6153
6154         # write patch
6155         if ($format eq 'html') {
6156                 my $use_parents = !defined $hash_parent ||
6157                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6158                 git_difftree_body(\@difftree, $hash,
6159                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6160                 print "<br/>\n";
6161
6162                 git_patchset_body($fd, \@difftree, $hash,
6163                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6164                 close $fd;
6165                 print "</div>\n"; # class="page_body"
6166                 git_footer_html();
6167
6168         } elsif ($format eq 'plain') {
6169                 local $/ = undef;
6170                 print <$fd>;
6171                 close $fd
6172                         or print "Reading git-diff-tree failed\n";
6173         } elsif ($format eq 'patch') {
6174                 local $/ = undef;
6175                 print <$fd>;
6176                 close $fd
6177                         or print "Reading git-format-patch failed\n";
6178         }
6179 }
6180
6181 sub git_commitdiff_plain {
6182         git_commitdiff(-format => 'plain');
6183 }
6184
6185 # format-patch-style patches
6186 sub git_patch {
6187         git_commitdiff(-format => 'patch', -single => 1);
6188 }
6189
6190 sub git_patches {
6191         git_commitdiff(-format => 'patch');
6192 }
6193
6194 sub git_history {
6195         git_log_generic('history', \&git_history_body,
6196                         $hash_base, $hash_parent_base,
6197                         $file_name, $hash);
6198 }
6199
6200 sub git_search {
6201         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6202         if (!defined $searchtext) {
6203                 die_error(400, "Text field is empty");
6204         }
6205         if (!defined $hash) {
6206                 $hash = git_get_head_hash($project);
6207         }
6208         my %co = parse_commit($hash);
6209         if (!%co) {
6210                 die_error(404, "Unknown commit object");
6211         }
6212         if (!defined $page) {
6213                 $page = 0;
6214         }
6215
6216         $searchtype ||= 'commit';
6217         if ($searchtype eq 'pickaxe') {
6218                 # pickaxe may take all resources of your box and run for several minutes
6219                 # with every query - so decide by yourself how public you make this feature
6220                 gitweb_check_feature('pickaxe')
6221                     or die_error(403, "Pickaxe is disabled");
6222         }
6223         if ($searchtype eq 'grep') {
6224                 gitweb_check_feature('grep')[0]
6225                     or die_error(403, "Grep is disabled");
6226         }
6227
6228         git_header_html();
6229
6230         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6231                 my $greptype;
6232                 if ($searchtype eq 'commit') {
6233                         $greptype = "--grep=";
6234                 } elsif ($searchtype eq 'author') {
6235                         $greptype = "--author=";
6236                 } elsif ($searchtype eq 'committer') {
6237                         $greptype = "--committer=";
6238                 }
6239                 $greptype .= $searchtext;
6240                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6241                                                $greptype, '--regexp-ignore-case',
6242                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6243
6244                 my $paging_nav = '';
6245                 if ($page > 0) {
6246                         $paging_nav .=
6247                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6248                                                        searchtext=>$searchtext,
6249                                                        searchtype=>$searchtype)},
6250                                         "first");
6251                         $paging_nav .= " &sdot; " .
6252                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6253                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6254                 } else {
6255                         $paging_nav .= "first";
6256                         $paging_nav .= " &sdot; prev";
6257                 }
6258                 my $next_link = '';
6259                 if ($#commitlist >= 100) {
6260                         $next_link =
6261                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6262                                          -accesskey => "n", -title => "Alt-n"}, "next");
6263                         $paging_nav .= " &sdot; $next_link";
6264                 } else {
6265                         $paging_nav .= " &sdot; next";
6266                 }
6267
6268                 if ($#commitlist >= 100) {
6269                 }
6270
6271                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6272                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6273                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6274         }
6275
6276         if ($searchtype eq 'pickaxe') {
6277                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6278                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6279
6280                 print "<table class=\"pickaxe search\">\n";
6281                 my $alternate = 1;
6282                 local $/ = "\n";
6283                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6284                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6285                         ($search_use_regexp ? '--pickaxe-regex' : ());
6286                 undef %co;
6287                 my @files;
6288                 while (my $line = <$fd>) {
6289                         chomp $line;
6290                         next unless $line;
6291
6292                         my %set = parse_difftree_raw_line($line);
6293                         if (defined $set{'commit'}) {
6294                                 # finish previous commit
6295                                 if (%co) {
6296                                         print "</td>\n" .
6297                                               "<td class=\"link\">" .
6298                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6299                                               " | " .
6300                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6301                                         print "</td>\n" .
6302                                               "</tr>\n";
6303                                 }
6304
6305                                 if ($alternate) {
6306                                         print "<tr class=\"dark\">\n";
6307                                 } else {
6308                                         print "<tr class=\"light\">\n";
6309                                 }
6310                                 $alternate ^= 1;
6311                                 %co = parse_commit($set{'commit'});
6312                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6313                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6314                                       "<td><i>$author</i></td>\n" .
6315                                       "<td>" .
6316                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6317                                               -class => "list subject"},
6318                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6319                         } elsif (defined $set{'to_id'}) {
6320                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6321
6322                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6323                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6324                                               -class => "list"},
6325                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6326                                       "<br/>\n";
6327                         }
6328                 }
6329                 close $fd;
6330
6331                 # finish last commit (warning: repetition!)
6332                 if (%co) {
6333                         print "</td>\n" .
6334                               "<td class=\"link\">" .
6335                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6336                               " | " .
6337                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6338                         print "</td>\n" .
6339                               "</tr>\n";
6340                 }
6341
6342                 print "</table>\n";
6343         }
6344
6345         if ($searchtype eq 'grep') {
6346                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6347                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6348
6349                 print "<table class=\"grep_search\">\n";
6350                 my $alternate = 1;
6351                 my $matches = 0;
6352                 local $/ = "\n";
6353                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6354                         $search_use_regexp ? ('-E', '-i') : '-F',
6355                         $searchtext, $co{'tree'};
6356                 my $lastfile = '';
6357                 while (my $line = <$fd>) {
6358                         chomp $line;
6359                         my ($file, $lno, $ltext, $binary);
6360                         last if ($matches++ > 1000);
6361                         if ($line =~ /^Binary file (.+) matches$/) {
6362                                 $file = $1;
6363                                 $binary = 1;
6364                         } else {
6365                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6366                         }
6367                         if ($file ne $lastfile) {
6368                                 $lastfile and print "</td></tr>\n";
6369                                 if ($alternate++) {
6370                                         print "<tr class=\"dark\">\n";
6371                                 } else {
6372                                         print "<tr class=\"light\">\n";
6373                                 }
6374                                 print "<td class=\"list\">".
6375                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6376                                                                file_name=>"$file"),
6377                                                 -class => "list"}, esc_path($file));
6378                                 print "</td><td>\n";
6379                                 $lastfile = $file;
6380                         }
6381                         if ($binary) {
6382                                 print "<div class=\"binary\">Binary file</div>\n";
6383                         } else {
6384                                 $ltext = untabify($ltext);
6385                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6386                                         $ltext = esc_html($1, -nbsp=>1);
6387                                         $ltext .= '<span class="match">';
6388                                         $ltext .= esc_html($2, -nbsp=>1);
6389                                         $ltext .= '</span>';
6390                                         $ltext .= esc_html($3, -nbsp=>1);
6391                                 } else {
6392                                         $ltext = esc_html($ltext, -nbsp=>1);
6393                                 }
6394                                 print "<div class=\"pre\">" .
6395                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6396                                                                file_name=>"$file").'#l'.$lno,
6397                                                 -class => "linenr"}, sprintf('%4i', $lno))
6398                                         . ' ' .  $ltext . "</div>\n";
6399                         }
6400                 }
6401                 if ($lastfile) {
6402                         print "</td></tr>\n";
6403                         if ($matches > 1000) {
6404                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6405                         }
6406                 } else {
6407                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6408                 }
6409                 close $fd;
6410
6411                 print "</table>\n";
6412         }
6413         git_footer_html();
6414 }
6415
6416 sub git_search_help {
6417         git_header_html();
6418         git_print_page_nav('','', $hash,$hash,$hash);
6419         print <<EOT;
6420 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6421 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6422 the pattern entered is recognized as the POSIX extended
6423 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6424 insensitive).</p>
6425 <dl>
6426 <dt><b>commit</b></dt>
6427 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6428 EOT
6429         my $have_grep = gitweb_check_feature('grep');
6430         if ($have_grep) {
6431                 print <<EOT;
6432 <dt><b>grep</b></dt>
6433 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6434     a different one) are searched for the given pattern. On large trees, this search can take
6435 a while and put some strain on the server, so please use it with some consideration. Note that
6436 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6437 case-sensitive.</dd>
6438 EOT
6439         }
6440         print <<EOT;
6441 <dt><b>author</b></dt>
6442 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6443 <dt><b>committer</b></dt>
6444 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6445 EOT
6446         my $have_pickaxe = gitweb_check_feature('pickaxe');
6447         if ($have_pickaxe) {
6448                 print <<EOT;
6449 <dt><b>pickaxe</b></dt>
6450 <dd>All commits that caused the string to appear or disappear from any file (changes that
6451 added, removed or "modified" the string) will be listed. This search can take a while and
6452 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6453 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6454 EOT
6455         }
6456         print "</dl>\n";
6457         git_footer_html();
6458 }
6459
6460 sub git_shortlog {
6461         git_log_generic('shortlog', \&git_shortlog_body,
6462                         $hash, $hash_parent);
6463 }
6464
6465 ## ......................................................................
6466 ## feeds (RSS, Atom; OPML)
6467
6468 sub git_feed {
6469         my $format = shift || 'atom';
6470         my $have_blame = gitweb_check_feature('blame');
6471
6472         # Atom: http://www.atomenabled.org/developers/syndication/
6473         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6474         if ($format ne 'rss' && $format ne 'atom') {
6475                 die_error(400, "Unknown web feed format");
6476         }
6477
6478         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6479         my $head = $hash || 'HEAD';
6480         my @commitlist = parse_commits($head, 150, 0, $file_name);
6481
6482         my %latest_commit;
6483         my %latest_date;
6484         my $content_type = "application/$format+xml";
6485         if (defined $cgi->http('HTTP_ACCEPT') &&
6486                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6487                 # browser (feed reader) prefers text/xml
6488                 $content_type = 'text/xml';
6489         }
6490         if (defined($commitlist[0])) {
6491                 %latest_commit = %{$commitlist[0]};
6492                 my $latest_epoch = $latest_commit{'committer_epoch'};
6493                 %latest_date   = parse_date($latest_epoch);
6494                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6495                 if (defined $if_modified) {
6496                         my $since;
6497                         if (eval { require HTTP::Date; 1; }) {
6498                                 $since = HTTP::Date::str2time($if_modified);
6499                         } elsif (eval { require Time::ParseDate; 1; }) {
6500                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6501                         }
6502                         if (defined $since && $latest_epoch <= $since) {
6503                                 print $cgi->header(
6504                                         -type => $content_type,
6505                                         -charset => 'utf-8',
6506                                         -last_modified => $latest_date{'rfc2822'},
6507                                         -status => '304 Not Modified');
6508                                 return;
6509                         }
6510                 }
6511                 print $cgi->header(
6512                         -type => $content_type,
6513                         -charset => 'utf-8',
6514                         -last_modified => $latest_date{'rfc2822'});
6515         } else {
6516                 print $cgi->header(
6517                         -type => $content_type,
6518                         -charset => 'utf-8');
6519         }
6520
6521         # Optimization: skip generating the body if client asks only
6522         # for Last-Modified date.
6523         return if ($cgi->request_method() eq 'HEAD');
6524
6525         # header variables
6526         my $title = "$site_name - $project/$action";
6527         my $feed_type = 'log';
6528         if (defined $hash) {
6529                 $title .= " - '$hash'";
6530                 $feed_type = 'branch log';
6531                 if (defined $file_name) {
6532                         $title .= " :: $file_name";
6533                         $feed_type = 'history';
6534                 }
6535         } elsif (defined $file_name) {
6536                 $title .= " - $file_name";
6537                 $feed_type = 'history';
6538         }
6539         $title .= " $feed_type";
6540         my $descr = git_get_project_description($project);
6541         if (defined $descr) {
6542                 $descr = esc_html($descr);
6543         } else {
6544                 $descr = "$project " .
6545                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6546                          " feed";
6547         }
6548         my $owner = git_get_project_owner($project);
6549         $owner = esc_html($owner);
6550
6551         #header
6552         my $alt_url;
6553         if (defined $file_name) {
6554                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6555         } elsif (defined $hash) {
6556                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6557         } else {
6558                 $alt_url = href(-full=>1, action=>"summary");
6559         }
6560         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6561         if ($format eq 'rss') {
6562                 print <<XML;
6563 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6564 <channel>
6565 XML
6566                 print "<title>$title</title>\n" .
6567                       "<link>$alt_url</link>\n" .
6568                       "<description>$descr</description>\n" .
6569                       "<language>en</language>\n" .
6570                       # project owner is responsible for 'editorial' content
6571                       "<managingEditor>$owner</managingEditor>\n";
6572                 if (defined $logo || defined $favicon) {
6573                         # prefer the logo to the favicon, since RSS
6574                         # doesn't allow both
6575                         my $img = esc_url($logo || $favicon);
6576                         print "<image>\n" .
6577                               "<url>$img</url>\n" .
6578                               "<title>$title</title>\n" .
6579                               "<link>$alt_url</link>\n" .
6580                               "</image>\n";
6581                 }
6582                 if (%latest_date) {
6583                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6584                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6585                 }
6586                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6587         } elsif ($format eq 'atom') {
6588                 print <<XML;
6589 <feed xmlns="http://www.w3.org/2005/Atom">
6590 XML
6591                 print "<title>$title</title>\n" .
6592                       "<subtitle>$descr</subtitle>\n" .
6593                       '<link rel="alternate" type="text/html" href="' .
6594                       $alt_url . '" />' . "\n" .
6595                       '<link rel="self" type="' . $content_type . '" href="' .
6596                       $cgi->self_url() . '" />' . "\n" .
6597                       "<id>" . href(-full=>1) . "</id>\n" .
6598                       # use project owner for feed author
6599                       "<author><name>$owner</name></author>\n";
6600                 if (defined $favicon) {
6601                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6602                 }
6603                 if (defined $logo_url) {
6604                         # not twice as wide as tall: 72 x 27 pixels
6605                         print "<logo>" . esc_url($logo) . "</logo>\n";
6606                 }
6607                 if (! %latest_date) {
6608                         # dummy date to keep the feed valid until commits trickle in:
6609                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6610                 } else {
6611                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6612                 }
6613                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6614         }
6615
6616         # contents
6617         for (my $i = 0; $i <= $#commitlist; $i++) {
6618                 my %co = %{$commitlist[$i]};
6619                 my $commit = $co{'id'};
6620                 # we read 150, we always show 30 and the ones more recent than 48 hours
6621                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6622                         last;
6623                 }
6624                 my %cd = parse_date($co{'author_epoch'});
6625
6626                 # get list of changed files
6627                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6628                         $co{'parent'} || "--root",
6629                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6630                         or next;
6631                 my @difftree = map { chomp; $_ } <$fd>;
6632                 close $fd
6633                         or next;
6634
6635                 # print element (entry, item)
6636                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6637                 if ($format eq 'rss') {
6638                         print "<item>\n" .
6639                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6640                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6641                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6642                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6643                               "<link>$co_url</link>\n" .
6644                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6645                               "<content:encoded>" .
6646                               "<![CDATA[\n";
6647                 } elsif ($format eq 'atom') {
6648                         print "<entry>\n" .
6649                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6650                               "<updated>$cd{'iso-8601'}</updated>\n" .
6651                               "<author>\n" .
6652                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6653                         if ($co{'author_email'}) {
6654                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6655                         }
6656                         print "</author>\n" .
6657                               # use committer for contributor
6658                               "<contributor>\n" .
6659                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6660                         if ($co{'committer_email'}) {
6661                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6662                         }
6663                         print "</contributor>\n" .
6664                               "<published>$cd{'iso-8601'}</published>\n" .
6665                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6666                               "<id>$co_url</id>\n" .
6667                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6668                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6669                 }
6670                 my $comment = $co{'comment'};
6671                 print "<pre>\n";
6672                 foreach my $line (@$comment) {
6673                         $line = esc_html($line);
6674                         print "$line\n";
6675                 }
6676                 print "</pre><ul>\n";
6677                 foreach my $difftree_line (@difftree) {
6678                         my %difftree = parse_difftree_raw_line($difftree_line);
6679                         next if !$difftree{'from_id'};
6680
6681                         my $file = $difftree{'file'} || $difftree{'to_file'};
6682
6683                         print "<li>" .
6684                               "[" .
6685                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6686                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6687                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6688                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6689                                       -title => "diff"}, 'D');
6690                         if ($have_blame) {
6691                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6692                                                              file_name=>$file, hash_base=>$commit),
6693                                               -title => "blame"}, 'B');
6694                         }
6695                         # if this is not a feed of a file history
6696                         if (!defined $file_name || $file_name ne $file) {
6697                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6698                                                              file_name=>$file, hash=>$commit),
6699                                               -title => "history"}, 'H');
6700                         }
6701                         $file = esc_path($file);
6702                         print "] ".
6703                               "$file</li>\n";
6704                 }
6705                 if ($format eq 'rss') {
6706                         print "</ul>]]>\n" .
6707                               "</content:encoded>\n" .
6708                               "</item>\n";
6709                 } elsif ($format eq 'atom') {
6710                         print "</ul>\n</div>\n" .
6711                               "</content>\n" .
6712                               "</entry>\n";
6713                 }
6714         }
6715
6716         # end of feed
6717         if ($format eq 'rss') {
6718                 print "</channel>\n</rss>\n";
6719         } elsif ($format eq 'atom') {
6720                 print "</feed>\n";
6721         }
6722 }
6723
6724 sub git_rss {
6725         git_feed('rss');
6726 }
6727
6728 sub git_atom {
6729         git_feed('atom');
6730 }
6731
6732 sub git_opml {
6733         my @list = git_get_projects_list();
6734
6735         print $cgi->header(
6736                 -type => 'text/xml',
6737                 -charset => 'utf-8',
6738                 -content_disposition => 'inline; filename="opml.xml"');
6739
6740         print <<XML;
6741 <?xml version="1.0" encoding="utf-8"?>
6742 <opml version="1.0">
6743 <head>
6744   <title>$site_name OPML Export</title>
6745 </head>
6746 <body>
6747 <outline text="git RSS feeds">
6748 XML
6749
6750         foreach my $pr (@list) {
6751                 my %proj = %$pr;
6752                 my $head = git_get_head_hash($proj{'path'});
6753                 if (!defined $head) {
6754                         next;
6755                 }
6756                 $git_dir = "$projectroot/$proj{'path'}";
6757                 my %co = parse_commit($head);
6758                 if (!%co) {
6759                         next;
6760                 }
6761
6762                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6763                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6764                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6765                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6766         }
6767         print <<XML;
6768 </outline>
6769 </body>
6770 </opml>
6771 XML
6772 }