index.cgi

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser set_message);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 our $t0;
  22 if (eval { require Time::HiRes; 1; }) {
  23         $t0 = [Time::HiRes::gettimeofday()];
  24 }
  25 our $number_of_git_cmds = 0;
  26
  27 BEGIN {
  28         CGI->compile() if $ENV{'MOD_PERL'};
  29 }
  30
  31 our $version = "1.7.2.5";
  32
  33 our ($my_url, $my_uri, $base_url, $path_info, $home_link);
  34 sub evaluate_uri {
  35         our $cgi;
  36
  37         our $my_url = $cgi->url();
  38         our $my_uri = $cgi->url(-absolute => 1);
  39
  40         # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  41         # needed and used only for URLs with nonempty PATH_INFO
  42         our $base_url = $my_url;
  43
  44         # When the script is used as DirectoryIndex, the URL does not contain the name
  45         # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  46         # have to do it ourselves. We make $path_info global because it's also used
  47         # later on.
  48         #
  49         # Another issue with the script being the DirectoryIndex is that the resulting
  50         # $my_url data is not the full script URL: this is good, because we want
  51         # generated links to keep implying the script name if it wasn't explicitly
  52         # indicated in the URL we're handling, but it means that $my_url cannot be used
  53         # as base URL.
  54         # Therefore, if we needed to strip PATH_INFO, then we know that we have
  55         # to build the base URL ourselves:
  56         our $path_info = $ENV{"PATH_INFO"};
  57         if ($path_info) {
  58                 if ($my_url =~ s,\Q$path_info\E$,, &&
  59                     $my_uri =~ s,\Q$path_info\E$,, &&
  60                     defined $ENV{'SCRIPT_NAME'}) {
  61                         $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  62                 }
  63         }
  64
  65         # target of the home link on top of all pages
  66         our $home_link = $my_uri || "/";
  67 }
  68
  69 # core git executable to use
  70 # this can just be "git" if your webserver has a sensible PATH
  71 our $GIT = "/usr/bin/git";
  72
  73 # absolute fs-path which will be prepended to the project path
  74 #our $projectroot = "/pub/scm";
  75 our $projectroot = "/pub/git";
  76
  77 # fs traversing limit for getting project list
  78 # the number is relative to the projectroot
  79 our $project_maxdepth = 2007;
  80
  81 # string of the home link on top of all pages
  82 our $home_link_str = "projects";
  83
  84 # name of your site or organization to appear in page titles
  85 # replace this with something more descriptive for clearer bookmarks
  86 our $site_name = ""
  87                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  88
  89 # filename of html text to include at top of each page
  90 our $site_header = "";
  91 # html text to include at home page
  92 our $home_text = "indextext.html";
  93 # filename of html text to include at bottom of each page
  94 our $site_footer = "";
  95
  96 # URI of stylesheets
  97 our @stylesheets = ("gitweb.css");
  98 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  99 our $stylesheet = undef;
 100 # URI of GIT logo (72x27 size)
 101 our $logo = "git-logo.png";
 102 # URI of GIT favicon, assumed to be image/png type
 103 our $favicon = "git-favicon.png";
 104 # URI of gitweb.js (JavaScript code for gitweb)
 105 our $javascript = "gitweb.js";
 106
 107 # URI and label (title) of GIT logo link
 108 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
 109 #our $logo_label = "git documentation";
 110 our $logo_url = "http://git-scm.com/";
 111 our $logo_label = "git homepage";
 112
 113 # source of projects list
 114 our $projects_list = "";
 115
 116 # the width (in characters) of the projects list "Description" column
 117 our $projects_list_description_width = 25;
 118
 119 # default order of projects list
 120 # valid values are none, project, descr, owner, and age
 121 our $default_projects_order = "project";
 122
 123 # show repository only if this file exists
 124 # (only effective if this variable evaluates to true)
 125 our $export_ok = "";
 126
 127 # show repository only if this subroutine returns true
 128 # when given the path to the project, for example:
 129 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 130 our $export_auth_hook = undef;
 131
 132 # only allow viewing of repositories also shown on the overview page
 133 our $strict_export = "";
 134
 135 # list of git base URLs used for URL to where fetch project from,
 136 # i.e. full URL is "$git_base_url/$project"
 137 our @git_base_url_list = grep { $_ ne '' } ("");
 138
 139 # default blob_plain mimetype and default charset for text/plain blob
 140 our $default_blob_plain_mimetype = 'text/plain';
 141 our $default_text_plain_charset  = undef;
 142
 143 # file to use for guessing MIME types before trying /etc/mime.types
 144 # (relative to the current git repository)
 145 our $mimetypes_file = undef;
 146
 147 # assume this charset if line contains non-UTF-8 characters;
 148 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 149 # for which encoding all byte sequences are valid, for example
 150 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 151 # could be even 'utf-8' for the old behavior)
 152 our $fallback_encoding = 'latin1';
 153
 154 # rename detection options for git-diff and git-diff-tree
 155 # - default is '-M', with the cost proportional to
 156 #   (number of removed files) * (number of new files).
 157 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 158 #   (number of changed files + number of removed files) * (number of new files)
 159 # - even more costly is '-C', '--find-copies-harder' with cost
 160 #   (number of files in the original tree) * (number of new files)
 161 # - one might want to include '-B' option, e.g. '-B', '-M'
 162 our @diff_opts = ('-M'); # taken from git_commit
 163
 164 # Disables features that would allow repository owners to inject script into
 165 # the gitweb domain.
 166 our $prevent_xss = 0;
 167
 168 # information about snapshot formats that gitweb is capable of serving
 169 our %known_snapshot_formats = (
 170         # name => {
 171         #       'display' => display name,
 172         #       'type' => mime type,
 173         #       'suffix' => filename suffix,
 174         #       'format' => --format for git-archive,
 175         #       'compressor' => [compressor command and arguments]
 176         #                       (array reference, optional)
 177         #       'disabled' => boolean (optional)}
 178         #
 179         'tgz' => {
 180                 'display' => 'tar.gz',
 181                 'type' => 'application/x-gzip',
 182                 'suffix' => '.tar.gz',
 183                 'format' => 'tar',
 184                 'compressor' => ['gzip']},
 185
 186         'tbz2' => {
 187                 'display' => 'tar.bz2',
 188                 'type' => 'application/x-bzip2',
 189                 'suffix' => '.tar.bz2',
 190                 'format' => 'tar',
 191                 'compressor' => ['bzip2']},
 192
 193         'txz' => {
 194                 'display' => 'tar.xz',
 195                 'type' => 'application/x-xz',
 196                 'suffix' => '.tar.xz',
 197                 'format' => 'tar',
 198                 'compressor' => ['xz'],
 199                 'disabled' => 1},
 200
 201         'zip' => {
 202                 'display' => 'zip',
 203                 'type' => 'application/x-zip',
 204                 'suffix' => '.zip',
 205                 'format' => 'zip'},
 206 );
 207
 208 # Aliases so we understand old gitweb.snapshot values in repository
 209 # configuration.
 210 our %known_snapshot_format_aliases = (
 211         'gzip'  => 'tgz',
 212         'bzip2' => 'tbz2',
 213         'xz'    => 'txz',
 214
 215         # backward compatibility: legacy gitweb config support
 216         'x-gzip' => undef, 'gz' => undef,
 217         'x-bzip2' => undef, 'bz2' => undef,
 218         'x-zip' => undef, '' => undef,
 219 );
 220
 221 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 222 # are changed, it may be appropriate to change these values too via
 223 # $GITWEB_CONFIG.
 224 our %avatar_size = (
 225         'default' => 16,
 226         'double'  => 32
 227 );
 228
 229 # Used to set the maximum load that we will still respond to gitweb queries.
 230 # If server load exceed this value then return "503 server busy" error.
 231 # If gitweb cannot determined server load, it is taken to be 0.
 232 # Leave it undefined (or set to 'undef') to turn off load checking.
 233 our $maxload = 300;
 234
 235 # You define site-wide feature defaults here; override them with
 236 # $GITWEB_CONFIG as necessary.
 237 our %feature = (
 238         # feature => {
 239         #       'sub' => feature-sub (subroutine),
 240         #       'override' => allow-override (boolean),
 241         #       'default' => [ default options...] (array reference)}
 242         #
 243         # if feature is overridable (it means that allow-override has true value),
 244         # then feature-sub will be called with default options as parameters;
 245         # return value of feature-sub indicates if to enable specified feature
 246         #
 247         # if there is no 'sub' key (no feature-sub), then feature cannot be
 248         # overridden
 249         #
 250         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 251         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 252         # is enabled
 253
 254         # Enable the 'blame' blob view, showing the last commit that modified
 255         # each line in the file. This can be very CPU-intensive.
 256
 257         # To enable system wide have in $GITWEB_CONFIG
 258         # $feature{'blame'}{'default'} = [1];
 259         # To have project specific config enable override in $GITWEB_CONFIG
 260         # $feature{'blame'}{'override'} = 1;
 261         # and in project config gitweb.blame = 0|1;
 262         'blame' => {
 263                 'sub' => sub { feature_bool('blame', @_) },
 264                 'override' => 0,
 265                 'default' => [0]},
 266
 267         # Enable the 'snapshot' link, providing a compressed archive of any
 268         # tree. This can potentially generate high traffic if you have large
 269         # project.
 270
 271         # Value is a list of formats defined in %known_snapshot_formats that
 272         # you wish to offer.
 273         # To disable system wide have in $GITWEB_CONFIG
 274         # $feature{'snapshot'}{'default'} = [];
 275         # To have project specific config enable override in $GITWEB_CONFIG
 276         # $feature{'snapshot'}{'override'} = 1;
 277         # and in project config, a comma-separated list of formats or "none"
 278         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 279         'snapshot' => {
 280                 'sub' => \&feature_snapshot,
 281                 'override' => 0,
 282                 'default' => ['tgz']},
 283
 284         # Enable text search, which will list the commits which match author,
 285         # committer or commit text to a given string.  Enabled by default.
 286         # Project specific override is not supported.
 287         'search' => {
 288                 'override' => 0,
 289                 'default' => [1]},
 290
 291         # Enable grep search, which will list the files in currently selected
 292         # tree containing the given string. Enabled by default. This can be
 293         # potentially CPU-intensive, of course.
 294
 295         # To enable system wide have in $GITWEB_CONFIG
 296         # $feature{'grep'}{'default'} = [1];
 297         # To have project specific config enable override in $GITWEB_CONFIG
 298         # $feature{'grep'}{'override'} = 1;
 299         # and in project config gitweb.grep = 0|1;
 300         'grep' => {
 301                 'sub' => sub { feature_bool('grep', @_) },
 302                 'override' => 0,
 303                 'default' => [1]},
 304
 305         # Enable the pickaxe search, which will list the commits that modified
 306         # a given string in a file. This can be practical and quite faster
 307         # alternative to 'blame', but still potentially CPU-intensive.
 308
 309         # To enable system wide have in $GITWEB_CONFIG
 310         # $feature{'pickaxe'}{'default'} = [1];
 311         # To have project specific config enable override in $GITWEB_CONFIG
 312         # $feature{'pickaxe'}{'override'} = 1;
 313         # and in project config gitweb.pickaxe = 0|1;
 314         'pickaxe' => {
 315                 'sub' => sub { feature_bool('pickaxe', @_) },
 316                 'override' => 0,
 317                 'default' => [1]},
 318
 319         # Enable showing size of blobs in a 'tree' view, in a separate
 320         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 321
 322         # To disable system wide have in $GITWEB_CONFIG
 323         # $feature{'show-sizes'}{'default'} = [0];
 324         # To have project specific config enable override in $GITWEB_CONFIG
 325         # $feature{'show-sizes'}{'override'} = 1;
 326         # and in project config gitweb.showsizes = 0|1;
 327         'show-sizes' => {
 328                 'sub' => sub { feature_bool('showsizes', @_) },
 329                 'override' => 0,
 330                 'default' => [1]},
 331
 332         # Make gitweb use an alternative format of the URLs which can be
 333         # more readable and natural-looking: project name is embedded
 334         # directly in the path and the query string contains other
 335         # auxiliary information. All gitweb installations recognize
 336         # URL in either format; this configures in which formats gitweb
 337         # generates links.
 338
 339         # To enable system wide have in $GITWEB_CONFIG
 340         # $feature{'pathinfo'}{'default'} = [1];
 341         # Project specific override is not supported.
 342
 343         # Note that you will need to change the default location of CSS,
 344         # favicon, logo and possibly other files to an absolute URL. Also,
 345         # if gitweb.cgi serves as your indexfile, you will need to force
 346         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 347         'pathinfo' => {
 348                 'override' => 0,
 349                 'default' => [0]},
 350
 351         # Make gitweb consider projects in project root subdirectories
 352         # to be forks of existing projects. Given project $projname.git,
 353         # projects matching $projname/*.git will not be shown in the main
 354         # projects list, instead a '+' mark will be added to $projname
 355         # there and a 'forks' view will be enabled for the project, listing
 356         # all the forks. If project list is taken from a file, forks have
 357         # to be listed after the main project.
 358
 359         # To enable system wide have in $GITWEB_CONFIG
 360         # $feature{'forks'}{'default'} = [1];
 361         # Project specific override is not supported.
 362         'forks' => {
 363                 'override' => 0,
 364                 'default' => [0]},
 365
 366         # Insert custom links to the action bar of all project pages.
 367         # This enables you mainly to link to third-party scripts integrating
 368         # into gitweb; e.g. git-browser for graphical history representation
 369         # or custom web-based repository administration interface.
 370
 371         # The 'default' value consists of a list of triplets in the form
 372         # (label, link, position) where position is the label after which
 373         # to insert the link and link is a format string where %n expands
 374         # to the project name, %f to the project path within the filesystem,
 375         # %h to the current hash (h gitweb parameter) and %b to the current
 376         # hash base (hb gitweb parameter); %% expands to %.
 377
 378         # To enable system wide have in $GITWEB_CONFIG e.g.
 379         # $feature{'actions'}{'default'} = [('graphiclog',
 380         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 381         # Project specific override is not supported.
 382         'actions' => {
 383                 'override' => 0,
 384                 'default' => []},
 385
 386         # Allow gitweb scan project content tags described in ctags/
 387         # of project repository, and display the popular Web 2.0-ish
 388         # "tag cloud" near the project list. Note that this is something
 389         # COMPLETELY different from the normal Git tags.
 390
 391         # gitweb by itself can show existing tags, but it does not handle
 392         # tagging itself; you need an external application for that.
 393         # For an example script, check Girocco's cgi/tagproj.cgi.
 394         # You may want to install the HTML::TagCloud Perl module to get
 395         # a pretty tag cloud instead of just a list of tags.
 396
 397         # To enable system wide have in $GITWEB_CONFIG
 398         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 399         # Project specific override is not supported.
 400         'ctags' => {
 401                 'override' => 0,
 402                 'default' => [0]},
 403
 404         # The maximum number of patches in a patchset generated in patch
 405         # view. Set this to 0 or undef to disable patch view, or to a
 406         # negative number to remove any limit.
 407
 408         # To disable system wide have in $GITWEB_CONFIG
 409         # $feature{'patches'}{'default'} = [0];
 410         # To have project specific config enable override in $GITWEB_CONFIG
 411         # $feature{'patches'}{'override'} = 1;
 412         # and in project config gitweb.patches = 0|n;
 413         # where n is the maximum number of patches allowed in a patchset.
 414         'patches' => {
 415                 'sub' => \&feature_patches,
 416                 'override' => 0,
 417                 'default' => [16]},
 418
 419         # Avatar support. When this feature is enabled, views such as
 420         # shortlog or commit will display an avatar associated with
 421         # the email of the committer(s) and/or author(s).
 422
 423         # Currently available providers are gravatar and picon.
 424         # If an unknown provider is specified, the feature is disabled.
 425
 426         # Gravatar depends on Digest::MD5.
 427         # Picon currently relies on the indiana.edu database.
 428
 429         # To enable system wide have in $GITWEB_CONFIG
 430         # $feature{'avatar'}{'default'} = ['<provider>'];
 431         # where <provider> is either gravatar or picon.
 432         # To have project specific config enable override in $GITWEB_CONFIG
 433         # $feature{'avatar'}{'override'} = 1;
 434         # and in project config gitweb.avatar = <provider>;
 435         'avatar' => {
 436                 'sub' => \&feature_avatar,
 437                 'override' => 0,
 438                 'default' => ['']},
 439
 440         # Enable displaying how much time and how many git commands
 441         # it took to generate and display page.  Disabled by default.
 442         # Project specific override is not supported.
 443         'timed' => {
 444                 'override' => 0,
 445                 'default' => [0]},
 446
 447         # Enable turning some links into links to actions which require
 448         # JavaScript to run (like 'blame_incremental').  Not enabled by
 449         # default.  Project specific override is currently not supported.
 450         'javascript-actions' => {
 451                 'override' => 0,
 452                 'default' => [0]},
 453
 454         # Syntax highlighting support. This is based on Daniel Svensson's
 455         # and Sham Chukoury's work in gitweb-xmms2.git.
 456         # It requires the 'highlight' program present in $PATH,
 457         # and therefore is disabled by default.
 458
 459         # To enable system wide have in $GITWEB_CONFIG
 460         # $feature{'highlight'}{'default'} = [1];
 461
 462         'highlight' => {
 463                 'sub' => sub { feature_bool('highlight', @_) },
 464                 'override' => 0,
 465                 'default' => [0]},
 466 );
 467
 468 sub gitweb_get_feature {
 469         my ($name) = @_;
 470         return unless exists $feature{$name};
 471         my ($sub, $override, @defaults) = (
 472                 $feature{$name}{'sub'},
 473                 $feature{$name}{'override'},
 474                 @{$feature{$name}{'default'}});
 475         # project specific override is possible only if we have project
 476         our $git_dir; # global variable, declared later
 477         if (!$override || !defined $git_dir) {
 478                 return @defaults;
 479         }
 480         if (!defined $sub) {
 481                 warn "feature $name is not overridable";
 482                 return @defaults;
 483         }
 484         return $sub->(@defaults);
 485 }
 486
 487 # A wrapper to check if a given feature is enabled.
 488 # With this, you can say
 489 #
 490 #   my $bool_feat = gitweb_check_feature('bool_feat');
 491 #   gitweb_check_feature('bool_feat') or somecode;
 492 #
 493 # instead of
 494 #
 495 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 496 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 497 #
 498 sub gitweb_check_feature {
 499         return (gitweb_get_feature(@_))[0];
 500 }
 501
 502
 503 sub feature_bool {
 504         my $key = shift;
 505         my ($val) = git_get_project_config($key, '--bool');
 506
 507         if (!defined $val) {
 508                 return ($_[0]);
 509         } elsif ($val eq 'true') {
 510                 return (1);
 511         } elsif ($val eq 'false') {
 512                 return (0);
 513         }
 514 }
 515
 516 sub feature_snapshot {
 517         my (@fmts) = @_;
 518
 519         my ($val) = git_get_project_config('snapshot');
 520
 521         if ($val) {
 522                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 523         }
 524
 525         return @fmts;
 526 }
 527
 528 sub feature_patches {
 529         my @val = (git_get_project_config('patches', '--int'));
 530
 531         if (@val) {
 532                 return @val;
 533         }
 534
 535         return ($_[0]);
 536 }
 537
 538 sub feature_avatar {
 539         my @val = (git_get_project_config('avatar'));
 540
 541         return @val ? @val : @_;
 542 }
 543
 544 # checking HEAD file with -e is fragile if the repository was
 545 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 546 # and then pruned.
 547 sub check_head_link {
 548         my ($dir) = @_;
 549         my $headfile = "$dir/HEAD";
 550         return ((-e $headfile) ||
 551                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 552 }
 553
 554 sub check_export_ok {
 555         my ($dir) = @_;
 556         return (check_head_link($dir) &&
 557                 (!$export_ok || -e "$dir/$export_ok") &&
 558                 (!$export_auth_hook || $export_auth_hook->($dir)));
 559 }
 560
 561 # process alternate names for backward compatibility
 562 # filter out unsupported (unknown) snapshot formats
 563 sub filter_snapshot_fmts {
 564         my @fmts = @_;
 565
 566         @fmts = map {
 567                 exists $known_snapshot_format_aliases{$_} ?
 568                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 569         @fmts = grep {
 570                 exists $known_snapshot_formats{$_} &&
 571                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 572 }
 573
 574 our ($GITWEB_CONFIG, $GITWEB_CONFIG_SYSTEM);
 575 sub evaluate_gitweb_config {
 576         our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "gitweb_config.perl";
 577         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "/etc/gitweb.conf";
 578         # die if there are errors parsing config file
 579         if (-e $GITWEB_CONFIG) {
 580                 do $GITWEB_CONFIG;
 581                 die $@ if $@;
 582         } elsif (-e $GITWEB_CONFIG_SYSTEM) {
 583                 do $GITWEB_CONFIG_SYSTEM;
 584                 die $@ if $@;
 585         }
 586 }
 587
 588 # Get loadavg of system, to compare against $maxload.
 589 # Currently it requires '/proc/loadavg' present to get loadavg;
 590 # if it is not present it returns 0, which means no load checking.
 591 sub get_loadavg {
 592         if( -e '/proc/loadavg' ){
 593                 open my $fd, '<', '/proc/loadavg'
 594                         or return 0;
 595                 my @load = split(/\s+/, scalar <$fd>);
 596                 close $fd;
 597
 598                 # The first three columns measure CPU and IO utilization of the last one,
 599                 # five, and 10 minute periods.  The fourth column shows the number of
 600                 # currently running processes and the total number of processes in the m/n
 601                 # format.  The last column displays the last process ID used.
 602                 return $load[0] || 0;
 603         }
 604         # additional checks for load average should go here for things that don't export
 605         # /proc/loadavg
 606
 607         return 0;
 608 }
 609
 610 # version of the core git binary
 611 our $git_version;
 612 sub evaluate_git_version {
 613         our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 614         $number_of_git_cmds++;
 615 }
 616
 617 sub check_loadavg {
 618         if (defined $maxload && get_loadavg() > $maxload) {
 619                 die_error(503, "The load average on the server is too high");
 620         }
 621 }
 622
 623 # ======================================================================
 624 # input validation and dispatch
 625
 626 # input parameters can be collected from a variety of sources (presently, CGI
 627 # and PATH_INFO), so we define an %input_params hash that collects them all
 628 # together during validation: this allows subsequent uses (e.g. href()) to be
 629 # agnostic of the parameter origin
 630
 631 our %input_params = ();
 632
 633 # input parameters are stored with the long parameter name as key. This will
 634 # also be used in the href subroutine to convert parameters to their CGI
 635 # equivalent, and since the href() usage is the most frequent one, we store
 636 # the name -> CGI key mapping here, instead of the reverse.
 637 #
 638 # XXX: Warning: If you touch this, check the search form for updating,
 639 # too.
 640
 641 our @cgi_param_mapping = (
 642         project => "p",
 643         action => "a",
 644         file_name => "f",
 645         file_parent => "fp",
 646         hash => "h",
 647         hash_parent => "hp",
 648         hash_base => "hb",
 649         hash_parent_base => "hpb",
 650         page => "pg",
 651         order => "o",
 652         searchtext => "s",
 653         searchtype => "st",
 654         snapshot_format => "sf",
 655         extra_options => "opt",
 656         search_use_regexp => "sr",
 657         # this must be last entry (for manipulation from JavaScript)
 658         javascript => "js"
 659 );
 660 our %cgi_param_mapping = @cgi_param_mapping;
 661
 662 # we will also need to know the possible actions, for validation
 663 our %actions = (
 664         "blame" => \&git_blame,
 665         "blame_incremental" => \&git_blame_incremental,
 666         "blame_data" => \&git_blame_data,
 667         "blobdiff" => \&git_blobdiff,
 668         "blobdiff_plain" => \&git_blobdiff_plain,
 669         "blob" => \&git_blob,
 670         "blob_plain" => \&git_blob_plain,
 671         "commitdiff" => \&git_commitdiff,
 672         "commitdiff_plain" => \&git_commitdiff_plain,
 673         "commit" => \&git_commit,
 674         "forks" => \&git_forks,
 675         "heads" => \&git_heads,
 676         "history" => \&git_history,
 677         "log" => \&git_log,
 678         "patch" => \&git_patch,
 679         "patches" => \&git_patches,
 680         "rss" => \&git_rss,
 681         "atom" => \&git_atom,
 682         "search" => \&git_search,
 683         "search_help" => \&git_search_help,
 684         "shortlog" => \&git_shortlog,
 685         "summary" => \&git_summary,
 686         "tag" => \&git_tag,
 687         "tags" => \&git_tags,
 688         "tree" => \&git_tree,
 689         "snapshot" => \&git_snapshot,
 690         "object" => \&git_object,
 691         # those below don't need $project
 692         "opml" => \&git_opml,
 693         "project_list" => \&git_project_list,
 694         "project_index" => \&git_project_index,
 695 );
 696
 697 # finally, we have the hash of allowed extra_options for the commands that
 698 # allow them
 699 our %allowed_options = (
 700         "--no-merges" => [ qw(rss atom log shortlog history) ],
 701 );
 702
 703 # fill %input_params with the CGI parameters. All values except for 'opt'
 704 # should be single values, but opt can be an array. We should probably
 705 # build an array of parameters that can be multi-valued, but since for the time
 706 # being it's only this one, we just single it out
 707 sub evaluate_query_params {
 708         our $cgi;
 709
 710         while (my ($name, $symbol) = each %cgi_param_mapping) {
 711                 if ($symbol eq 'opt') {
 712                         $input_params{$name} = [ $cgi->param($symbol) ];
 713                 } else {
 714                         $input_params{$name} = $cgi->param($symbol);
 715                 }
 716         }
 717 }
 718
 719 # now read PATH_INFO and update the parameter list for missing parameters
 720 sub evaluate_path_info {
 721         return if defined $input_params{'project'};
 722         return if !$path_info;
 723         $path_info =~ s,^/+,,;
 724         return if !$path_info;
 725
 726         # find which part of PATH_INFO is project
 727         my $project = $path_info;
 728         $project =~ s,/+$,,;
 729         while ($project && !check_head_link("$projectroot/$project")) {
 730                 $project =~ s,/*[^/]*$,,;
 731         }
 732         return unless $project;
 733         $input_params{'project'} = $project;
 734
 735         # do not change any parameters if an action is given using the query string
 736         return if $input_params{'action'};
 737         $path_info =~ s,^\Q$project\E/*,,;
 738
 739         # next, check if we have an action
 740         my $action = $path_info;
 741         $action =~ s,/.*$,,;
 742         if (exists $actions{$action}) {
 743                 $path_info =~ s,^$action/*,,;
 744                 $input_params{'action'} = $action;
 745         }
 746
 747         # list of actions that want hash_base instead of hash, but can have no
 748         # pathname (f) parameter
 749         my @wants_base = (
 750                 'tree',
 751                 'history',
 752         );
 753
 754         # we want to catch
 755         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 756         my ($parentrefname, $parentpathname, $refname, $pathname) =
 757                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 758
 759         # first, analyze the 'current' part
 760         if (defined $pathname) {
 761                 # we got "branch:filename" or "branch:dir/"
 762                 # we could use git_get_type(branch:pathname), but:
 763                 # - it needs $git_dir
 764                 # - it does a git() call
 765                 # - the convention of terminating directories with a slash
 766                 #   makes it superfluous
 767                 # - embedding the action in the PATH_INFO would make it even
 768                 #   more superfluous
 769                 $pathname =~ s,^/+,,;
 770                 if (!$pathname || substr($pathname, -1) eq "/") {
 771                         $input_params{'action'} ||= "tree";
 772                         $pathname =~ s,/$,,;
 773                 } else {
 774                         # the default action depends on whether we had parent info
 775                         # or not
 776                         if ($parentrefname) {
 777                                 $input_params{'action'} ||= "blobdiff_plain";
 778                         } else {
 779                                 $input_params{'action'} ||= "blob_plain";
 780                         }
 781                 }
 782                 $input_params{'hash_base'} ||= $refname;
 783                 $input_params{'file_name'} ||= $pathname;
 784         } elsif (defined $refname) {
 785                 # we got "branch". In this case we have to choose if we have to
 786                 # set hash or hash_base.
 787                 #
 788                 # Most of the actions without a pathname only want hash to be
 789                 # set, except for the ones specified in @wants_base that want
 790                 # hash_base instead. It should also be noted that hand-crafted
 791                 # links having 'history' as an action and no pathname or hash
 792                 # set will fail, but that happens regardless of PATH_INFO.
 793                 $input_params{'action'} ||= "shortlog";
 794                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 795                         $input_params{'hash_base'} ||= $refname;
 796                 } else {
 797                         $input_params{'hash'} ||= $refname;
 798                 }
 799         }
 800
 801         # next, handle the 'parent' part, if present
 802         if (defined $parentrefname) {
 803                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 804                 # someproject/blobdiff/oldrev..newrev:/filename
 805                 if ($parentpathname) {
 806                         $parentpathname =~ s,^/+,,;
 807                         $parentpathname =~ s,/$,,;
 808                         $input_params{'file_parent'} ||= $parentpathname;
 809                 } else {
 810                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 811                 }
 812                 # we assume that hash_parent_base is wanted if a path was specified,
 813                 # or if the action wants hash_base instead of hash
 814                 if (defined $input_params{'file_parent'} ||
 815                         grep { $_ eq $input_params{'action'} } @wants_base) {
 816                         $input_params{'hash_parent_base'} ||= $parentrefname;
 817                 } else {
 818                         $input_params{'hash_parent'} ||= $parentrefname;
 819                 }
 820         }
 821
 822         # for the snapshot action, we allow URLs in the form
 823         # $project/snapshot/$hash.ext
 824         # where .ext determines the snapshot and gets removed from the
 825         # passed $refname to provide the $hash.
 826         #
 827         # To be able to tell that $refname includes the format extension, we
 828         # require the following two conditions to be satisfied:
 829         # - the hash input parameter MUST have been set from the $refname part
 830         #   of the URL (i.e. they must be equal)
 831         # - the snapshot format MUST NOT have been defined already (e.g. from
 832         #   CGI parameter sf)
 833         # It's also useless to try any matching unless $refname has a dot,
 834         # so we check for that too
 835         if (defined $input_params{'action'} &&
 836                 $input_params{'action'} eq 'snapshot' &&
 837                 defined $refname && index($refname, '.') != -1 &&
 838                 $refname eq $input_params{'hash'} &&
 839                 !defined $input_params{'snapshot_format'}) {
 840                 # We loop over the known snapshot formats, checking for
 841                 # extensions. Allowed extensions are both the defined suffix
 842                 # (which includes the initial dot already) and the snapshot
 843                 # format key itself, with a prepended dot
 844                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 845                         my $hash = $refname;
 846                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 847                                 next;
 848                         }
 849                         my $sfx = $1;
 850                         # a valid suffix was found, so set the snapshot format
 851                         # and reset the hash parameter
 852                         $input_params{'snapshot_format'} = $fmt;
 853                         $input_params{'hash'} = $hash;
 854                         # we also set the format suffix to the one requested
 855                         # in the URL: this way a request for e.g. .tgz returns
 856                         # a .tgz instead of a .tar.gz
 857                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 858                         last;
 859                 }
 860         }
 861 }
 862
 863 our ($action, $project, $file_name, $file_parent, $hash, $hash_parent, $hash_base,
 864      $hash_parent_base, @extra_options, $page, $searchtype, $search_use_regexp,
 865      $searchtext, $search_regexp);
 866 sub evaluate_and_validate_params {
 867         our $action = $input_params{'action'};
 868         if (defined $action) {
 869                 if (!validate_action($action)) {
 870                         die_error(400, "Invalid action parameter");
 871                 }
 872         }
 873
 874         # parameters which are pathnames
 875         our $project = $input_params{'project'};
 876         if (defined $project) {
 877                 if (!validate_project($project)) {
 878                         undef $project;
 879                         die_error(404, "No such project");
 880                 }
 881         }
 882
 883         our $file_name = $input_params{'file_name'};
 884         if (defined $file_name) {
 885                 if (!validate_pathname($file_name)) {
 886                         die_error(400, "Invalid file parameter");
 887                 }
 888         }
 889
 890         our $file_parent = $input_params{'file_parent'};
 891         if (defined $file_parent) {
 892                 if (!validate_pathname($file_parent)) {
 893                         die_error(400, "Invalid file parent parameter");
 894                 }
 895         }
 896
 897         # parameters which are refnames
 898         our $hash = $input_params{'hash'};
 899         if (defined $hash) {
 900                 if (!validate_refname($hash)) {
 901                         die_error(400, "Invalid hash parameter");
 902                 }
 903         }
 904
 905         our $hash_parent = $input_params{'hash_parent'};
 906         if (defined $hash_parent) {
 907                 if (!validate_refname($hash_parent)) {
 908                         die_error(400, "Invalid hash parent parameter");
 909                 }
 910         }
 911
 912         our $hash_base = $input_params{'hash_base'};
 913         if (defined $hash_base) {
 914                 if (!validate_refname($hash_base)) {
 915                         die_error(400, "Invalid hash base parameter");
 916                 }
 917         }
 918
 919         our @extra_options = @{$input_params{'extra_options'}};
 920         # @extra_options is always defined, since it can only be (currently) set from
 921         # CGI, and $cgi->param() returns the empty array in array context if the param
 922         # is not set
 923         foreach my $opt (@extra_options) {
 924                 if (not exists $allowed_options{$opt}) {
 925                         die_error(400, "Invalid option parameter");
 926                 }
 927                 if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 928                         die_error(400, "Invalid option parameter for this action");
 929                 }
 930         }
 931
 932         our $hash_parent_base = $input_params{'hash_parent_base'};
 933         if (defined $hash_parent_base) {
 934                 if (!validate_refname($hash_parent_base)) {
 935                         die_error(400, "Invalid hash parent base parameter");
 936                 }
 937         }
 938
 939         # other parameters
 940         our $page = $input_params{'page'};
 941         if (defined $page) {
 942                 if ($page =~ m/[^0-9]/) {
 943                         die_error(400, "Invalid page parameter");
 944                 }
 945         }
 946
 947         our $searchtype = $input_params{'searchtype'};
 948         if (defined $searchtype) {
 949                 if ($searchtype =~ m/[^a-z]/) {
 950                         die_error(400, "Invalid searchtype parameter");
 951                 }
 952         }
 953
 954         our $search_use_regexp = $input_params{'search_use_regexp'};
 955
 956         our $searchtext = $input_params{'searchtext'};
 957         our $search_regexp;
 958         if (defined $searchtext) {
 959                 if (length($searchtext) < 2) {
 960                         die_error(403, "At least two characters are required for search parameter");
 961                 }
 962                 $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 963         }
 964 }
 965
 966 # path to the current git repository
 967 our $git_dir;
 968 sub evaluate_git_dir {
 969         our $git_dir = "$projectroot/$project" if $project;
 970 }
 971
 972 our (@snapshot_fmts, $git_avatar);
 973 sub configure_gitweb_features {
 974         # list of supported snapshot formats
 975         our @snapshot_fmts = gitweb_get_feature('snapshot');
 976         @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 977
 978         # check that the avatar feature is set to a known provider name,
 979         # and for each provider check if the dependencies are satisfied.
 980         # if the provider name is invalid or the dependencies are not met,
 981         # reset $git_avatar to the empty string.
 982         our ($git_avatar) = gitweb_get_feature('avatar');
 983         if ($git_avatar eq 'gravatar') {
 984                 $git_avatar = '' unless (eval { require Digest::MD5; 1; });
 985         } elsif ($git_avatar eq 'picon') {
 986                 # no dependencies
 987         } else {
 988                 $git_avatar = '';
 989         }
 990 }
 991
 992 # custom error handler: 'die <message>' is Internal Server Error
 993 sub handle_errors_html {
 994         my $msg = shift; # it is already HTML escaped
 995
 996         # to avoid infinite loop where error occurs in die_error,
 997         # change handler to default handler, disabling handle_errors_html
 998         set_message("Error occured when inside die_error:\n$msg");
 999
1000         # you cannot jump out of die_error when called as error handler;
1001         # the subroutine set via CGI::Carp::set_message is called _after_
1002         # HTTP headers are already written, so it cannot write them itself
1003         die_error(undef, undef, $msg, -error_handler => 1, -no_http_header => 1);
1004 }
1005 set_message(\&handle_errors_html);
1006
1007 # dispatch
1008 sub dispatch {
1009         if (!defined $action) {
1010                 if (defined $hash) {
1011                         $action = git_get_type($hash);
1012                 } elsif (defined $hash_base && defined $file_name) {
1013                         $action = git_get_type("$hash_base:$file_name");
1014                 } elsif (defined $project) {
1015                         $action = 'summary';
1016                 } else {
1017                         $action = 'project_list';
1018                 }
1019         }
1020         if (!defined($actions{$action})) {
1021                 die_error(400, "Unknown action");
1022         }
1023         if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
1024             !$project) {
1025                 die_error(400, "Project needed");
1026         }
1027         $actions{$action}->();
1028 }
1029
1030 sub reset_timer {
1031         our $t0 = [Time::HiRes::gettimeofday()]
1032                 if defined $t0;
1033         our $number_of_git_cmds = 0;
1034 }
1035
1036 sub run_request {
1037         reset_timer();
1038
1039         evaluate_uri();
1040         evaluate_gitweb_config();
1041         check_loadavg();
1042
1043         # $projectroot and $projects_list might be set in gitweb config file
1044         $projects_list ||= $projectroot;
1045
1046         evaluate_query_params();
1047         evaluate_path_info();
1048         evaluate_and_validate_params();
1049         evaluate_git_dir();
1050
1051         configure_gitweb_features();
1052
1053         dispatch();
1054 }
1055
1056 our $is_last_request = sub { 1 };
1057 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1058 our $CGI = 'CGI';
1059 our $cgi;
1060 sub configure_as_fcgi {
1061         require CGI::Fast;
1062         our $CGI = 'CGI::Fast';
1063
1064         my $request_number = 0;
1065         # let each child service 100 requests
1066         our $is_last_request = sub { ++$request_number > 100 };
1067 }
1068 sub evaluate_argv {
1069         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1070         configure_as_fcgi()
1071                 if $script_name =~ /\.fcgi$/;
1072
1073         return unless (@ARGV);
1074
1075         require Getopt::Long;
1076         Getopt::Long::GetOptions(
1077                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1078                 'nproc|n=i' => sub {
1079                         my ($arg, $val) = @_;
1080                         return unless eval { require FCGI::ProcManager; 1; };
1081                         my $proc_manager = FCGI::ProcManager->new({
1082                                 n_processes => $val,
1083                         });
1084                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1085                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1086                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1087                 },
1088         );
1089 }
1090
1091 sub run {
1092         evaluate_argv();
1093         evaluate_git_version();
1094
1095         $pre_listen_hook->()
1096                 if $pre_listen_hook;
1097
1098  REQUEST:
1099         while ($cgi = $CGI->new()) {
1100                 $pre_dispatch_hook->()
1101                         if $pre_dispatch_hook;
1102
1103                 run_request();
1104
1105                 $pre_dispatch_hook->()
1106                         if $post_dispatch_hook;
1107
1108                 last REQUEST if ($is_last_request->());
1109         }
1110
1111  DONE_GITWEB:
1112         1;
1113 }
1114
1115 run();
1116
1117 if (defined caller) {
1118         # wrapped in a subroutine processing requests,
1119         # e.g. mod_perl with ModPerl::Registry, or PSGI with Plack::App::WrapCGI
1120         return;
1121 } else {
1122         # pure CGI script, serving single request
1123         exit;
1124 }
1125
1126 ## ======================================================================
1127 ## action links
1128
1129 # possible values of extra options
1130 # -full => 0|1      - use absolute/full URL ($my_uri/$my_url as base)
1131 # -replay => 1      - start from a current view (replay with modifications)
1132 # -path_info => 0|1 - don't use/use path_info URL (if possible)
1133 sub href {
1134         my %params = @_;
1135         # default is to use -absolute url() i.e. $my_uri
1136         my $href = $params{-full} ? $my_url : $my_uri;
1137
1138         $params{'project'} = $project unless exists $params{'project'};
1139
1140         if ($params{-replay}) {
1141                 while (my ($name, $symbol) = each %cgi_param_mapping) {
1142                         if (!exists $params{$name}) {
1143                                 $params{$name} = $input_params{$name};
1144                         }
1145                 }
1146         }
1147
1148         my $use_pathinfo = gitweb_check_feature('pathinfo');
1149         if (defined $params{'project'} &&
1150             (exists $params{-path_info} ? $params{-path_info} : $use_pathinfo)) {
1151                 # try to put as many parameters as possible in PATH_INFO:
1152                 #   - project name
1153                 #   - action
1154                 #   - hash_parent or hash_parent_base:/file_parent
1155                 #   - hash or hash_base:/filename
1156                 #   - the snapshot_format as an appropriate suffix
1157
1158                 # When the script is the root DirectoryIndex for the domain,
1159                 # $href here would be something like http://gitweb.example.com/
1160                 # Thus, we strip any trailing / from $href, to spare us double
1161                 # slashes in the final URL
1162                 $href =~ s,/$,,;
1163
1164                 # Then add the project name, if present
1165                 $href .= "/".esc_url($params{'project'});
1166                 delete $params{'project'};
1167
1168                 # since we destructively absorb parameters, we keep this
1169                 # boolean that remembers if we're handling a snapshot
1170                 my $is_snapshot = $params{'action'} eq 'snapshot';
1171
1172                 # Summary just uses the project path URL, any other action is
1173                 # added to the URL
1174                 if (defined $params{'action'}) {
1175                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
1176                         delete $params{'action'};
1177                 }
1178
1179                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
1180                 # stripping nonexistent or useless pieces
1181                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
1182                         || $params{'hash_parent'} || $params{'hash'});
1183                 if (defined $params{'hash_base'}) {
1184                         if (defined $params{'hash_parent_base'}) {
1185                                 $href .= esc_url($params{'hash_parent_base'});
1186                                 # skip the file_parent if it's the same as the file_name
1187                                 if (defined $params{'file_parent'}) {
1188                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
1189                                                 delete $params{'file_parent'};
1190                                         } elsif ($params{'file_parent'} !~ /\.\./) {
1191                                                 $href .= ":/".esc_url($params{'file_parent'});
1192                                                 delete $params{'file_parent'};
1193                                         }
1194                                 }
1195                                 $href .= "..";
1196                                 delete $params{'hash_parent'};
1197                                 delete $params{'hash_parent_base'};
1198                         } elsif (defined $params{'hash_parent'}) {
1199                                 $href .= esc_url($params{'hash_parent'}). "..";
1200                                 delete $params{'hash_parent'};
1201                         }
1202
1203                         $href .= esc_url($params{'hash_base'});
1204                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1205                                 $href .= ":/".esc_url($params{'file_name'});
1206                                 delete $params{'file_name'};
1207                         }
1208                         delete $params{'hash'};
1209                         delete $params{'hash_base'};
1210                 } elsif (defined $params{'hash'}) {
1211                         $href .= esc_url($params{'hash'});
1212                         delete $params{'hash'};
1213                 }
1214
1215                 # If the action was a snapshot, we can absorb the
1216                 # snapshot_format parameter too
1217                 if ($is_snapshot) {
1218                         my $fmt = $params{'snapshot_format'};
1219                         # snapshot_format should always be defined when href()
1220                         # is called, but just in case some code forgets, we
1221                         # fall back to the default
1222                         $fmt ||= $snapshot_fmts[0];
1223                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1224                         delete $params{'snapshot_format'};
1225                 }
1226         }
1227
1228         # now encode the parameters explicitly
1229         my @result = ();
1230         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1231                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1232                 if (defined $params{$name}) {
1233                         if (ref($params{$name}) eq "ARRAY") {
1234                                 foreach my $par (@{$params{$name}}) {
1235                                         push @result, $symbol . "=" . esc_param($par);
1236                                 }
1237                         } else {
1238                                 push @result, $symbol . "=" . esc_param($params{$name});
1239                         }
1240                 }
1241         }
1242         $href .= "?" . join(';', @result) if scalar @result;
1243
1244         return $href;
1245 }
1246
1247
1248 ## ======================================================================
1249 ## validation, quoting/unquoting and escaping
1250
1251 sub validate_action {
1252         my $input = shift || return undef;
1253         return undef unless exists $actions{$input};
1254         return $input;
1255 }
1256
1257 sub validate_project {
1258         my $input = shift || return undef;
1259         if (!validate_pathname($input) ||
1260                 !(-d "$projectroot/$input") ||
1261                 !check_export_ok("$projectroot/$input") ||
1262                 ($strict_export && !project_in_list($input))) {
1263                 return undef;
1264         } else {
1265                 return $input;
1266         }
1267 }
1268
1269 sub validate_pathname {
1270         my $input = shift || return undef;
1271
1272         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1273         # at the beginning, at the end, and between slashes.
1274         # also this catches doubled slashes
1275         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1276                 return undef;
1277         }
1278         # no null characters
1279         if ($input =~ m!\0!) {
1280                 return undef;
1281         }
1282         return $input;
1283 }
1284
1285 sub validate_refname {
1286         my $input = shift || return undef;
1287
1288         # textual hashes are O.K.
1289         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1290                 return $input;
1291         }
1292         # it must be correct pathname
1293         $input = validate_pathname($input)
1294                 or return undef;
1295         # restrictions on ref name according to git-check-ref-format
1296         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1297                 return undef;
1298         }
1299         return $input;
1300 }
1301
1302 # decode sequences of octets in utf8 into Perl's internal form,
1303 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1304 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1305 sub to_utf8 {
1306         my $str = shift;
1307         return undef unless defined $str;
1308         if (utf8::valid($str)) {
1309                 utf8::decode($str);
1310                 return $str;
1311         } else {
1312                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1313         }
1314 }
1315
1316 # quote unsafe chars, but keep the slash, even when it's not
1317 # correct, but quoted slashes look too horrible in bookmarks
1318 sub esc_param {
1319         my $str = shift;
1320         return undef unless defined $str;
1321         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1322         $str =~ s/ /\+/g;
1323         return $str;
1324 }
1325
1326 # quote unsafe chars in whole URL, so some characters cannot be quoted
1327 sub esc_url {
1328         my $str = shift;
1329         return undef unless defined $str;
1330         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&= ]+)/CGI::escape($1)/eg;
1331         $str =~ s/ /\+/g;
1332         return $str;
1333 }
1334
1335 # quote unsafe characters in HTML attributes
1336 sub esc_attr {
1337
1338         # for XHTML conformance escaping '"' to '&quot;' is not enough
1339         return esc_html(@_);
1340 }
1341
1342 # replace invalid utf8 character with SUBSTITUTION sequence
1343 sub esc_html {
1344         my $str = shift;
1345         my %opts = @_;
1346
1347         return undef unless defined $str;
1348
1349         $str = to_utf8($str);
1350         $str = $cgi->escapeHTML($str);
1351         if ($opts{'-nbsp'}) {
1352                 $str =~ s/ /&nbsp;/g;
1353         }
1354         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1355         return $str;
1356 }
1357
1358 # quote control characters and escape filename to HTML
1359 sub esc_path {
1360         my $str = shift;
1361         my %opts = @_;
1362
1363         return undef unless defined $str;
1364
1365         $str = to_utf8($str);
1366         $str = $cgi->escapeHTML($str);
1367         if ($opts{'-nbsp'}) {
1368                 $str =~ s/ /&nbsp;/g;
1369         }
1370         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1371         return $str;
1372 }
1373
1374 # Make control characters "printable", using character escape codes (CEC)
1375 sub quot_cec {
1376         my $cntrl = shift;
1377         my %opts = @_;
1378         my %es = ( # character escape codes, aka escape sequences
1379                 "\t" => '\t',   # tab            (HT)
1380                 "\n" => '\n',   # line feed      (LF)
1381                 "\r" => '\r',   # carrige return (CR)
1382                 "\f" => '\f',   # form feed      (FF)
1383                 "\b" => '\b',   # backspace      (BS)
1384                 "\a" => '\a',   # alarm (bell)   (BEL)
1385                 "\e" => '\e',   # escape         (ESC)
1386                 "\013" => '\v', # vertical tab   (VT)
1387                 "\000" => '\0', # nul character  (NUL)
1388         );
1389         my $chr = ( (exists $es{$cntrl})
1390                     ? $es{$cntrl}
1391                     : sprintf('\%2x', ord($cntrl)) );
1392         if ($opts{-nohtml}) {
1393                 return $chr;
1394         } else {
1395                 return "<span class=\"cntrl\">$chr</span>";
1396         }
1397 }
1398
1399 # Alternatively use unicode control pictures codepoints,
1400 # Unicode "printable representation" (PR)
1401 sub quot_upr {
1402         my $cntrl = shift;
1403         my %opts = @_;
1404
1405         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1406         if ($opts{-nohtml}) {
1407                 return $chr;
1408         } else {
1409                 return "<span class=\"cntrl\">$chr</span>";
1410         }
1411 }
1412
1413 # git may return quoted and escaped filenames
1414 sub unquote {
1415         my $str = shift;
1416
1417         sub unq {
1418                 my $seq = shift;
1419                 my %es = ( # character escape codes, aka escape sequences
1420                         't' => "\t",   # tab            (HT, TAB)
1421                         'n' => "\n",   # newline        (NL)
1422                         'r' => "\r",   # return         (CR)
1423                         'f' => "\f",   # form feed      (FF)
1424                         'b' => "\b",   # backspace      (BS)
1425                         'a' => "\a",   # alarm (bell)   (BEL)
1426                         'e' => "\e",   # escape         (ESC)
1427                         'v' => "\013", # vertical tab   (VT)
1428                 );
1429
1430                 if ($seq =~ m/^[0-7]{1,3}$/) {
1431                         # octal char sequence
1432                         return chr(oct($seq));
1433                 } elsif (exists $es{$seq}) {
1434                         # C escape sequence, aka character escape code
1435                         return $es{$seq};
1436                 }
1437                 # quoted ordinary character
1438                 return $seq;
1439         }
1440
1441         if ($str =~ m/^"(.*)"$/) {
1442                 # needs unquoting
1443                 $str = $1;
1444                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1445         }
1446         return $str;
1447 }
1448
1449 # escape tabs (convert tabs to spaces)
1450 sub untabify {
1451         my $line = shift;
1452
1453         while ((my $pos = index($line, "\t")) != -1) {
1454                 if (my $count = (8 - ($pos % 8))) {
1455                         my $spaces = ' ' x $count;
1456                         $line =~ s/\t/$spaces/;
1457                 }
1458         }
1459
1460         return $line;
1461 }
1462
1463 sub project_in_list {
1464         my $project = shift;
1465         my @list = git_get_projects_list();
1466         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1467 }
1468
1469 ## ----------------------------------------------------------------------
1470 ## HTML aware string manipulation
1471
1472 # Try to chop given string on a word boundary between position
1473 # $len and $len+$add_len. If there is no word boundary there,
1474 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1475 # (marking chopped part) would be longer than given string.
1476 sub chop_str {
1477         my $str = shift;
1478         my $len = shift;
1479         my $add_len = shift || 10;
1480         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1481
1482         # Make sure perl knows it is utf8 encoded so we don't
1483         # cut in the middle of a utf8 multibyte char.
1484         $str = to_utf8($str);
1485
1486         # allow only $len chars, but don't cut a word if it would fit in $add_len
1487         # if it doesn't fit, cut it if it's still longer than the dots we would add
1488         # remove chopped character entities entirely
1489
1490         # when chopping in the middle, distribute $len into left and right part
1491         # return early if chopping wouldn't make string shorter
1492         if ($where eq 'center') {
1493                 return $str if ($len + 5 >= length($str)); # filler is length 5
1494                 $len = int($len/2);
1495         } else {
1496                 return $str if ($len + 4 >= length($str)); # filler is length 4
1497         }
1498
1499         # regexps: ending and beginning with word part up to $add_len
1500         my $endre = qr/.{$len}\w{0,$add_len}/;
1501         my $begre = qr/\w{0,$add_len}.{$len}/;
1502
1503         if ($where eq 'left') {
1504                 $str =~ m/^(.*?)($begre)$/;
1505                 my ($lead, $body) = ($1, $2);
1506                 if (length($lead) > 4) {
1507                         $lead = " ...";
1508                 }
1509                 return "$lead$body";
1510
1511         } elsif ($where eq 'center') {
1512                 $str =~ m/^($endre)(.*)$/;
1513                 my ($left, $str)  = ($1, $2);
1514                 $str =~ m/^(.*?)($begre)$/;
1515                 my ($mid, $right) = ($1, $2);
1516                 if (length($mid) > 5) {
1517                         $mid = " ... ";
1518                 }
1519                 return "$left$mid$right";
1520
1521         } else {
1522                 $str =~ m/^($endre)(.*)$/;
1523                 my $body = $1;
1524                 my $tail = $2;
1525                 if (length($tail) > 4) {
1526                         $tail = "... ";
1527                 }
1528                 return "$body$tail";
1529         }
1530 }
1531
1532 # takes the same arguments as chop_str, but also wraps a <span> around the
1533 # result with a title attribute if it does get chopped. Additionally, the
1534 # string is HTML-escaped.
1535 sub chop_and_escape_str {
1536         my ($str) = @_;
1537
1538         my $chopped = chop_str(@_);
1539         if ($chopped eq $str) {
1540                 return esc_html($chopped);
1541         } else {
1542                 $str =~ s/[[:cntrl:]]/?/g;
1543                 return $cgi->span({-title=>$str}, esc_html($chopped));
1544         }
1545 }
1546
1547 ## ----------------------------------------------------------------------
1548 ## functions returning short strings
1549
1550 # CSS class for given age value (in seconds)
1551 sub age_class {
1552         my $age = shift;
1553
1554         if (!defined $age) {
1555                 return "noage";
1556         } elsif ($age < 60*60*2) {
1557                 return "age0";
1558         } elsif ($age < 60*60*24*2) {
1559                 return "age1";
1560         } else {
1561                 return "age2";
1562         }
1563 }
1564
1565 # convert age in seconds to "nn units ago" string
1566 sub age_string {
1567         my $age = shift;
1568         my $age_str;
1569
1570         if ($age > 60*60*24*365*2) {
1571                 $age_str = (int $age/60/60/24/365);
1572                 $age_str .= " years ago";
1573         } elsif ($age > 60*60*24*(365/12)*2) {
1574                 $age_str = int $age/60/60/24/(365/12);
1575                 $age_str .= " months ago";
1576         } elsif ($age > 60*60*24*7*2) {
1577                 $age_str = int $age/60/60/24/7;
1578                 $age_str .= " weeks ago";
1579         } elsif ($age > 60*60*24*2) {
1580                 $age_str = int $age/60/60/24;
1581                 $age_str .= " days ago";
1582         } elsif ($age > 60*60*2) {
1583                 $age_str = int $age/60/60;
1584                 $age_str .= " hours ago";
1585         } elsif ($age > 60*2) {
1586                 $age_str = int $age/60;
1587                 $age_str .= " min ago";
1588         } elsif ($age > 2) {
1589                 $age_str = int $age;
1590                 $age_str .= " sec ago";
1591         } else {
1592                 $age_str .= " right now";
1593         }
1594         return $age_str;
1595 }
1596
1597 use constant {
1598         S_IFINVALID => 0030000,
1599         S_IFGITLINK => 0160000,
1600 };
1601
1602 # submodule/subproject, a commit object reference
1603 sub S_ISGITLINK {
1604         my $mode = shift;
1605
1606         return (($mode & S_IFMT) == S_IFGITLINK)
1607 }
1608
1609 # convert file mode in octal to symbolic file mode string
1610 sub mode_str {
1611         my $mode = oct shift;
1612
1613         if (S_ISGITLINK($mode)) {
1614                 return 'm---------';
1615         } elsif (S_ISDIR($mode & S_IFMT)) {
1616                 return 'drwxr-xr-x';
1617         } elsif (S_ISLNK($mode)) {
1618                 return 'lrwxrwxrwx';
1619         } elsif (S_ISREG($mode)) {
1620                 # git cares only about the executable bit
1621                 if ($mode & S_IXUSR) {
1622                         return '-rwxr-xr-x';
1623                 } else {
1624                         return '-rw-r--r--';
1625                 };
1626         } else {
1627                 return '----------';
1628         }
1629 }
1630
1631 # convert file mode in octal to file type string
1632 sub file_type {
1633         my $mode = shift;
1634
1635         if ($mode !~ m/^[0-7]+$/) {
1636                 return $mode;
1637         } else {
1638                 $mode = oct $mode;
1639         }
1640
1641         if (S_ISGITLINK($mode)) {
1642                 return "submodule";
1643         } elsif (S_ISDIR($mode & S_IFMT)) {
1644                 return "directory";
1645         } elsif (S_ISLNK($mode)) {
1646                 return "symlink";
1647         } elsif (S_ISREG($mode)) {
1648                 return "file";
1649         } else {
1650                 return "unknown";
1651         }
1652 }
1653
1654 # convert file mode in octal to file type description string
1655 sub file_type_long {
1656         my $mode = shift;
1657
1658         if ($mode !~ m/^[0-7]+$/) {
1659                 return $mode;
1660         } else {
1661                 $mode = oct $mode;
1662         }
1663
1664         if (S_ISGITLINK($mode)) {
1665                 return "submodule";
1666         } elsif (S_ISDIR($mode & S_IFMT)) {
1667                 return "directory";
1668         } elsif (S_ISLNK($mode)) {
1669                 return "symlink";
1670         } elsif (S_ISREG($mode)) {
1671                 if ($mode & S_IXUSR) {
1672                         return "executable";
1673                 } else {
1674                         return "file";
1675                 };
1676         } else {
1677                 return "unknown";
1678         }
1679 }
1680
1681
1682 ## ----------------------------------------------------------------------
1683 ## functions returning short HTML fragments, or transforming HTML fragments
1684 ## which don't belong to other sections
1685
1686 # format line of commit message.
1687 sub format_log_line_html {
1688         my $line = shift;
1689
1690         $line = esc_html($line, -nbsp=>1);
1691         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1692                 $cgi->a({-href => href(action=>"object", hash=>$1),
1693                                         -class => "text"}, $1);
1694         }eg;
1695
1696         return $line;
1697 }
1698
1699 # format marker of refs pointing to given object
1700
1701 # the destination action is chosen based on object type and current context:
1702 # - for annotated tags, we choose the tag view unless it's the current view
1703 #   already, in which case we go to shortlog view
1704 # - for other refs, we keep the current view if we're in history, shortlog or
1705 #   log view, and select shortlog otherwise
1706 sub format_ref_marker {
1707         my ($refs, $id) = @_;
1708         my $markers = '';
1709
1710         if (defined $refs->{$id}) {
1711                 foreach my $ref (@{$refs->{$id}}) {
1712                         # this code exploits the fact that non-lightweight tags are the
1713                         # only indirect objects, and that they are the only objects for which
1714                         # we want to use tag instead of shortlog as action
1715                         my ($type, $name) = qw();
1716                         my $indirect = ($ref =~ s/\^\{\}$//);
1717                         # e.g. tags/v2.6.11 or heads/next
1718                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1719                                 $type = $1;
1720                                 $name = $2;
1721                         } else {
1722                                 $type = "ref";
1723                                 $name = $ref;
1724                         }
1725
1726                         my $class = $type;
1727                         $class .= " indirect" if $indirect;
1728
1729                         my $dest_action = "shortlog";
1730
1731                         if ($indirect) {
1732                                 $dest_action = "tag" unless $action eq "tag";
1733                         } elsif ($action =~ /^(history|(short)?log)$/) {
1734                                 $dest_action = $action;
1735                         }
1736
1737                         my $dest = "";
1738                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1739                         $dest .= $ref;
1740
1741                         my $link = $cgi->a({
1742                                 -href => href(
1743                                         action=>$dest_action,
1744                                         hash=>$dest
1745                                 )}, $name);
1746
1747                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
1748                                 $link . "</span>";
1749                 }
1750         }
1751
1752         if ($markers) {
1753                 return ' <span class="refs">'. $markers . '</span>';
1754         } else {
1755                 return "";
1756         }
1757 }
1758
1759 # format, perhaps shortened and with markers, title line
1760 sub format_subject_html {
1761         my ($long, $short, $href, $extra) = @_;
1762         $extra = '' unless defined($extra);
1763
1764         if (length($short) < length($long)) {
1765                 $long =~ s/[[:cntrl:]]/?/g;
1766                 return $cgi->a({-href => $href, -class => "list subject",
1767                                 -title => to_utf8($long)},
1768                        esc_html($short)) . $extra;
1769         } else {
1770                 return $cgi->a({-href => $href, -class => "list subject"},
1771                        esc_html($long)) . $extra;
1772         }
1773 }
1774
1775 # Rather than recomputing the url for an email multiple times, we cache it
1776 # after the first hit. This gives a visible benefit in views where the avatar
1777 # for the same email is used repeatedly (e.g. shortlog).
1778 # The cache is shared by all avatar engines (currently gravatar only), which
1779 # are free to use it as preferred. Since only one avatar engine is used for any
1780 # given page, there's no risk for cache conflicts.
1781 our %avatar_cache = ();
1782
1783 # Compute the picon url for a given email, by using the picon search service over at
1784 # http://www.cs.indiana.edu/picons/search.html
1785 sub picon_url {
1786         my $email = lc shift;
1787         if (!$avatar_cache{$email}) {
1788                 my ($user, $domain) = split('@', $email);
1789                 $avatar_cache{$email} =
1790                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1791                         "$domain/$user/" .
1792                         "users+domains+unknown/up/single";
1793         }
1794         return $avatar_cache{$email};
1795 }
1796
1797 # Compute the gravatar url for a given email, if it's not in the cache already.
1798 # Gravatar stores only the part of the URL before the size, since that's the
1799 # one computationally more expensive. This also allows reuse of the cache for
1800 # different sizes (for this particular engine).
1801 sub gravatar_url {
1802         my $email = lc shift;
1803         my $size = shift;
1804         $avatar_cache{$email} ||=
1805                 "http://www.gravatar.com/avatar/" .
1806                         Digest::MD5::md5_hex($email) . "?s=";
1807         return $avatar_cache{$email} . $size;
1808 }
1809
1810 # Insert an avatar for the given $email at the given $size if the feature
1811 # is enabled.
1812 sub git_get_avatar {
1813         my ($email, %opts) = @_;
1814         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1815         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1816         $opts{-size} ||= 'default';
1817         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1818         my $url = "";
1819         if ($git_avatar eq 'gravatar') {
1820                 $url = gravatar_url($email, $size);
1821         } elsif ($git_avatar eq 'picon') {
1822                 $url = picon_url($email);
1823         }
1824         # Other providers can be added by extending the if chain, defining $url
1825         # as needed. If no variant puts something in $url, we assume avatars
1826         # are completely disabled/unavailable.
1827         if ($url) {
1828                 return $pre_white .
1829                        "<img width=\"$size\" " .
1830                             "class=\"avatar\" " .
1831                             "src=\"".esc_url($url)."\" " .
1832                             "alt=\"\" " .
1833                        "/>" . $post_white;
1834         } else {
1835                 return "";
1836         }
1837 }
1838
1839 sub format_search_author {
1840         my ($author, $searchtype, $displaytext) = @_;
1841         my $have_search = gitweb_check_feature('search');
1842
1843         if ($have_search) {
1844                 my $performed = "";
1845                 if ($searchtype eq 'author') {
1846                         $performed = "authored";
1847                 } elsif ($searchtype eq 'committer') {
1848                         $performed = "committed";
1849                 }
1850
1851                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1852                                 searchtext=>$author,
1853                                 searchtype=>$searchtype), class=>"list",
1854                                 title=>"Search for commits $performed by $author"},
1855                                 $displaytext);
1856
1857         } else {
1858                 return $displaytext;
1859         }
1860 }
1861
1862 # format the author name of the given commit with the given tag
1863 # the author name is chopped and escaped according to the other
1864 # optional parameters (see chop_str).
1865 sub format_author_html {
1866         my $tag = shift;
1867         my $co = shift;
1868         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1869         return "<$tag class=\"author\">" .
1870                format_search_author($co->{'author_name'}, "author",
1871                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1872                        $author) .
1873                "</$tag>";
1874 }
1875
1876 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1877 sub format_git_diff_header_line {
1878         my $line = shift;
1879         my $diffinfo = shift;
1880         my ($from, $to) = @_;
1881
1882         if ($diffinfo->{'nparents'}) {
1883                 # combined diff
1884                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1885                 if ($to->{'href'}) {
1886                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1887                                          esc_path($to->{'file'}));
1888                 } else { # file was deleted (no href)
1889                         $line .= esc_path($to->{'file'});
1890                 }
1891         } else {
1892                 # "ordinary" diff
1893                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1894                 if ($from->{'href'}) {
1895                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1896                                          'a/' . esc_path($from->{'file'}));
1897                 } else { # file was added (no href)
1898                         $line .= 'a/' . esc_path($from->{'file'});
1899                 }
1900                 $line .= ' ';
1901                 if ($to->{'href'}) {
1902                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1903                                          'b/' . esc_path($to->{'file'}));
1904                 } else { # file was deleted
1905                         $line .= 'b/' . esc_path($to->{'file'});
1906                 }
1907         }
1908
1909         return "<div class=\"diff header\">$line</div>\n";
1910 }
1911
1912 # format extended diff header line, before patch itself
1913 sub format_extended_diff_header_line {
1914         my $line = shift;
1915         my $diffinfo = shift;
1916         my ($from, $to) = @_;
1917
1918         # match <path>
1919         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1920                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1921                                        esc_path($from->{'file'}));
1922         }
1923         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1924                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1925                                  esc_path($to->{'file'}));
1926         }
1927         # match single <mode>
1928         if ($line =~ m/\s(\d{6})$/) {
1929                 $line .= '<span class="info"> (' .
1930                          file_type_long($1) .
1931                          ')</span>';
1932         }
1933         # match <hash>
1934         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1935                 # can match only for combined diff
1936                 $line = 'index ';
1937                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1938                         if ($from->{'href'}[$i]) {
1939                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1940                                                   -class=>"hash"},
1941                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1942                         } else {
1943                                 $line .= '0' x 7;
1944                         }
1945                         # separator
1946                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1947                 }
1948                 $line .= '..';
1949                 if ($to->{'href'}) {
1950                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1951                                          substr($diffinfo->{'to_id'},0,7));
1952                 } else {
1953                         $line .= '0' x 7;
1954                 }
1955
1956         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1957                 # can match only for ordinary diff
1958                 my ($from_link, $to_link);
1959                 if ($from->{'href'}) {
1960                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1961                                              substr($diffinfo->{'from_id'},0,7));
1962                 } else {
1963                         $from_link = '0' x 7;
1964                 }
1965                 if ($to->{'href'}) {
1966                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1967                                            substr($diffinfo->{'to_id'},0,7));
1968                 } else {
1969                         $to_link = '0' x 7;
1970                 }
1971                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1972                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1973         }
1974
1975         return $line . "<br/>\n";
1976 }
1977
1978 # format from-file/to-file diff header
1979 sub format_diff_from_to_header {
1980         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1981         my $line;
1982         my $result = '';
1983
1984         $line = $from_line;
1985         #assert($line =~ m/^---/) if DEBUG;
1986         # no extra formatting for "^--- /dev/null"
1987         if (! $diffinfo->{'nparents'}) {
1988                 # ordinary (single parent) diff
1989                 if ($line =~ m!^--- "?a/!) {
1990                         if ($from->{'href'}) {
1991                                 $line = '--- a/' .
1992                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1993                                                 esc_path($from->{'file'}));
1994                         } else {
1995                                 $line = '--- a/' .
1996                                         esc_path($from->{'file'});
1997                         }
1998                 }
1999                 $result .= qq!<div class="diff from_file">$line</div>\n!;
2000
2001         } else {
2002                 # combined diff (merge commit)
2003                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2004                         if ($from->{'href'}[$i]) {
2005                                 $line = '--- ' .
2006                                         $cgi->a({-href=>href(action=>"blobdiff",
2007                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
2008                                                              hash_parent_base=>$parents[$i],
2009                                                              file_parent=>$from->{'file'}[$i],
2010                                                              hash=>$diffinfo->{'to_id'},
2011                                                              hash_base=>$hash,
2012                                                              file_name=>$to->{'file'}),
2013                                                  -class=>"path",
2014                                                  -title=>"diff" . ($i+1)},
2015                                                 $i+1) .
2016                                         '/' .
2017                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
2018                                                 esc_path($from->{'file'}[$i]));
2019                         } else {
2020                                 $line = '--- /dev/null';
2021                         }
2022                         $result .= qq!<div class="diff from_file">$line</div>\n!;
2023                 }
2024         }
2025
2026         $line = $to_line;
2027         #assert($line =~ m/^\+\+\+/) if DEBUG;
2028         # no extra formatting for "^+++ /dev/null"
2029         if ($line =~ m!^\+\+\+ "?b/!) {
2030                 if ($to->{'href'}) {
2031                         $line = '+++ b/' .
2032                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
2033                                         esc_path($to->{'file'}));
2034                 } else {
2035                         $line = '+++ b/' .
2036                                 esc_path($to->{'file'});
2037                 }
2038         }
2039         $result .= qq!<div class="diff to_file">$line</div>\n!;
2040
2041         return $result;
2042 }
2043
2044 # create note for patch simplified by combined diff
2045 sub format_diff_cc_simplified {
2046         my ($diffinfo, @parents) = @_;
2047         my $result = '';
2048
2049         $result .= "<div class=\"diff header\">" .
2050                    "diff --cc ";
2051         if (!is_deleted($diffinfo)) {
2052                 $result .= $cgi->a({-href => href(action=>"blob",
2053                                                   hash_base=>$hash,
2054                                                   hash=>$diffinfo->{'to_id'},
2055                                                   file_name=>$diffinfo->{'to_file'}),
2056                                     -class => "path"},
2057                                    esc_path($diffinfo->{'to_file'}));
2058         } else {
2059                 $result .= esc_path($diffinfo->{'to_file'});
2060         }
2061         $result .= "</div>\n" . # class="diff header"
2062                    "<div class=\"diff nodifferences\">" .
2063                    "Simple merge" .
2064                    "</div>\n"; # class="diff nodifferences"
2065
2066         return $result;
2067 }
2068
2069 # format patch (diff) line (not to be used for diff headers)
2070 sub format_diff_line {
2071         my $line = shift;
2072         my ($from, $to) = @_;
2073         my $diff_class = "";
2074
2075         chomp $line;
2076
2077         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
2078                 # combined diff
2079                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
2080                 if ($line =~ m/^\@{3}/) {
2081                         $diff_class = " chunk_header";
2082                 } elsif ($line =~ m/^\\/) {
2083                         $diff_class = " incomplete";
2084                 } elsif ($prefix =~ tr/+/+/) {
2085                         $diff_class = " add";
2086                 } elsif ($prefix =~ tr/-/-/) {
2087                         $diff_class = " rem";
2088                 }
2089         } else {
2090                 # assume ordinary diff
2091                 my $char = substr($line, 0, 1);
2092                 if ($char eq '+') {
2093                         $diff_class = " add";
2094                 } elsif ($char eq '-') {
2095                         $diff_class = " rem";
2096                 } elsif ($char eq '@') {
2097                         $diff_class = " chunk_header";
2098                 } elsif ($char eq "\\") {
2099                         $diff_class = " incomplete";
2100                 }
2101         }
2102         $line = untabify($line);
2103         if ($from && $to && $line =~ m/^\@{2} /) {
2104                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
2105                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
2106
2107                 $from_lines = 0 unless defined $from_lines;
2108                 $to_lines   = 0 unless defined $to_lines;
2109
2110                 if ($from->{'href'}) {
2111                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
2112                                              -class=>"list"}, $from_text);
2113                 }
2114                 if ($to->{'href'}) {
2115                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
2116                                              -class=>"list"}, $to_text);
2117                 }
2118                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
2119                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2120                 return "<div class=\"diff$diff_class\">$line</div>\n";
2121         } elsif ($from && $to && $line =~ m/^\@{3}/) {
2122                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
2123                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
2124
2125                 @from_text = split(' ', $ranges);
2126                 for (my $i = 0; $i < @from_text; ++$i) {
2127                         ($from_start[$i], $from_nlines[$i]) =
2128                                 (split(',', substr($from_text[$i], 1)), 0);
2129                 }
2130
2131                 $to_text   = pop @from_text;
2132                 $to_start  = pop @from_start;
2133                 $to_nlines = pop @from_nlines;
2134
2135                 $line = "<span class=\"chunk_info\">$prefix ";
2136                 for (my $i = 0; $i < @from_text; ++$i) {
2137                         if ($from->{'href'}[$i]) {
2138                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
2139                                                   -class=>"list"}, $from_text[$i]);
2140                         } else {
2141                                 $line .= $from_text[$i];
2142                         }
2143                         $line .= " ";
2144                 }
2145                 if ($to->{'href'}) {
2146                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
2147                                           -class=>"list"}, $to_text);
2148                 } else {
2149                         $line .= $to_text;
2150                 }
2151                 $line .= " $prefix</span>" .
2152                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
2153                 return "<div class=\"diff$diff_class\">$line</div>\n";
2154         }
2155         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
2156 }
2157
2158 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
2159 # linked.  Pass the hash of the tree/commit to snapshot.
2160 sub format_snapshot_links {
2161         my ($hash) = @_;
2162         my $num_fmts = @snapshot_fmts;
2163         if ($num_fmts > 1) {
2164                 # A parenthesized list of links bearing format names.
2165                 # e.g. "snapshot (_tar.gz_ _zip_)"
2166                 return "snapshot (" . join(' ', map
2167                         $cgi->a({
2168                                 -href => href(
2169                                         action=>"snapshot",
2170                                         hash=>$hash,
2171                                         snapshot_format=>$_
2172                                 )
2173                         }, $known_snapshot_formats{$_}{'display'})
2174                 , @snapshot_fmts) . ")";
2175         } elsif ($num_fmts == 1) {
2176                 # A single "snapshot" link whose tooltip bears the format name.
2177                 # i.e. "_snapshot_"
2178                 my ($fmt) = @snapshot_fmts;
2179                 return
2180                         $cgi->a({
2181                                 -href => href(
2182                                         action=>"snapshot",
2183                                         hash=>$hash,
2184                                         snapshot_format=>$fmt
2185                                 ),
2186                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
2187                         }, "snapshot");
2188         } else { # $num_fmts == 0
2189                 return undef;
2190         }
2191 }
2192
2193 ## ......................................................................
2194 ## functions returning values to be passed, perhaps after some
2195 ## transformation, to other functions; e.g. returning arguments to href()
2196
2197 # returns hash to be passed to href to generate gitweb URL
2198 # in -title key it returns description of link
2199 sub get_feed_info {
2200         my $format = shift || 'Atom';
2201         my %res = (action => lc($format));
2202
2203         # feed links are possible only for project views
2204         return unless (defined $project);
2205         # some views should link to OPML, or to generic project feed,
2206         # or don't have specific feed yet (so they should use generic)
2207         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
2208
2209         my $branch;
2210         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2211         # from tag links; this also makes possible to detect branch links
2212         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2213             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2214                 $branch = $1;
2215         }
2216         # find log type for feed description (title)
2217         my $type = 'log';
2218         if (defined $file_name) {
2219                 $type  = "history of $file_name";
2220                 $type .= "/" if ($action eq 'tree');
2221                 $type .= " on '$branch'" if (defined $branch);
2222         } else {
2223                 $type = "log of $branch" if (defined $branch);
2224         }
2225
2226         $res{-title} = $type;
2227         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2228         $res{'file_name'} = $file_name;
2229
2230         return %res;
2231 }
2232
2233 ## ----------------------------------------------------------------------
2234 ## git utility subroutines, invoking git commands
2235
2236 # returns path to the core git executable and the --git-dir parameter as list
2237 sub git_cmd {
2238         $number_of_git_cmds++;
2239         return $GIT, '--git-dir='.$git_dir;
2240 }
2241
2242 # quote the given arguments for passing them to the shell
2243 # quote_command("command", "arg 1", "arg with ' and ! characters")
2244 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2245 # Try to avoid using this function wherever possible.
2246 sub quote_command {
2247         return join(' ',
2248                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2249 }
2250
2251 # get HEAD ref of given project as hash
2252 sub git_get_head_hash {
2253         return git_get_full_hash(shift, 'HEAD');
2254 }
2255
2256 sub git_get_full_hash {
2257         return git_get_hash(@_);
2258 }
2259
2260 sub git_get_short_hash {
2261         return git_get_hash(@_, '--short=7');
2262 }
2263
2264 sub git_get_hash {
2265         my ($project, $hash, @options) = @_;
2266         my $o_git_dir = $git_dir;
2267         my $retval = undef;
2268         $git_dir = "$projectroot/$project";
2269         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2270             '--verify', '-q', @options, $hash) {
2271                 $retval = <$fd>;
2272                 chomp $retval if defined $retval;
2273                 close $fd;
2274         }
2275         if (defined $o_git_dir) {
2276                 $git_dir = $o_git_dir;
2277         }
2278         return $retval;
2279 }
2280
2281 # get type of given object
2282 sub git_get_type {
2283         my $hash = shift;
2284
2285         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2286         my $type = <$fd>;
2287         close $fd or return;
2288         chomp $type;
2289         return $type;
2290 }
2291
2292 # repository configuration
2293 our $config_file = '';
2294 our %config;
2295
2296 # store multiple values for single key as anonymous array reference
2297 # single values stored directly in the hash, not as [ <value> ]
2298 sub hash_set_multi {
2299         my ($hash, $key, $value) = @_;
2300
2301         if (!exists $hash->{$key}) {
2302                 $hash->{$key} = $value;
2303         } elsif (!ref $hash->{$key}) {
2304                 $hash->{$key} = [ $hash->{$key}, $value ];
2305         } else {
2306                 push @{$hash->{$key}}, $value;
2307         }
2308 }
2309
2310 # return hash of git project configuration
2311 # optionally limited to some section, e.g. 'gitweb'
2312 sub git_parse_project_config {
2313         my $section_regexp = shift;
2314         my %config;
2315
2316         local $/ = "\0";
2317
2318         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2319                 or return;
2320
2321         while (my $keyval = <$fh>) {
2322                 chomp $keyval;
2323                 my ($key, $value) = split(/\n/, $keyval, 2);
2324
2325                 hash_set_multi(\%config, $key, $value)
2326                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2327         }
2328         close $fh;
2329
2330         return %config;
2331 }
2332
2333 # convert config value to boolean: 'true' or 'false'
2334 # no value, number > 0, 'true' and 'yes' values are true
2335 # rest of values are treated as false (never as error)
2336 sub config_to_bool {
2337         my $val = shift;
2338
2339         return 1 if !defined $val;             # section.key
2340
2341         # strip leading and trailing whitespace
2342         $val =~ s/^\s+//;
2343         $val =~ s/\s+$//;
2344
2345         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2346                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2347 }
2348
2349 # convert config value to simple decimal number
2350 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2351 # to be multiplied by 1024, 1048576, or 1073741824
2352 sub config_to_int {
2353         my $val = shift;
2354
2355         # strip leading and trailing whitespace
2356         $val =~ s/^\s+//;
2357         $val =~ s/\s+$//;
2358
2359         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2360                 $unit = lc($unit);
2361                 # unknown unit is treated as 1
2362                 return $num * ($unit eq 'g' ? 1073741824 :
2363                                $unit eq 'm' ?    1048576 :
2364                                $unit eq 'k' ?       1024 : 1);
2365         }
2366         return $val;
2367 }
2368
2369 # convert config value to array reference, if needed
2370 sub config_to_multi {
2371         my $val = shift;
2372
2373         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2374 }
2375
2376 sub git_get_project_config {
2377         my ($key, $type) = @_;
2378
2379         return unless defined $git_dir;
2380
2381         # key sanity check
2382         return unless ($key);
2383         $key =~ s/^gitweb\.//;
2384         return if ($key =~ m/\W/);
2385
2386         # type sanity check
2387         if (defined $type) {
2388                 $type =~ s/^--//;
2389                 $type = undef
2390                         unless ($type eq 'bool' || $type eq 'int');
2391         }
2392
2393         # get config
2394         if (!defined $config_file ||
2395             $config_file ne "$git_dir/config") {
2396                 %config = git_parse_project_config('gitweb');
2397                 $config_file = "$git_dir/config";
2398         }
2399
2400         # check if config variable (key) exists
2401         return unless exists $config{"gitweb.$key"};
2402
2403         # ensure given type
2404         if (!defined $type) {
2405                 return $config{"gitweb.$key"};
2406         } elsif ($type eq 'bool') {
2407                 # backward compatibility: 'git config --bool' returns true/false
2408                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2409         } elsif ($type eq 'int') {
2410                 return config_to_int($config{"gitweb.$key"});
2411         }
2412         return $config{"gitweb.$key"};
2413 }
2414
2415 # get hash of given path at given ref
2416 sub git_get_hash_by_path {
2417         my $base = shift;
2418         my $path = shift || return undef;
2419         my $type = shift;
2420
2421         $path =~ s,/+$,,;
2422
2423         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2424                 or die_error(500, "Open git-ls-tree failed");
2425         my $line = <$fd>;
2426         close $fd or return undef;
2427
2428         if (!defined $line) {
2429                 # there is no tree or hash given by $path at $base
2430                 return undef;
2431         }
2432
2433         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2434         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2435         if (defined $type && $type ne $2) {
2436                 # type doesn't match
2437                 return undef;
2438         }
2439         return $3;
2440 }
2441
2442 # get path of entry with given hash at given tree-ish (ref)
2443 # used to get 'from' filename for combined diff (merge commit) for renames
2444 sub git_get_path_by_hash {
2445         my $base = shift || return;
2446         my $hash = shift || return;
2447
2448         local $/ = "\0";
2449
2450         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2451                 or return undef;
2452         while (my $line = <$fd>) {
2453                 chomp $line;
2454
2455                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2456                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2457                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2458                         close $fd;
2459                         return $1;
2460                 }
2461         }
2462         close $fd;
2463         return undef;
2464 }
2465
2466 ## ......................................................................
2467 ## git utility functions, directly accessing git repository
2468
2469 sub git_get_project_description {
2470         my $path = shift;
2471
2472         $git_dir = "$projectroot/$path";
2473         open my $fd, '<', "$git_dir/description"
2474                 or return git_get_project_config('description');
2475         my $descr = <$fd>;
2476         close $fd;
2477         if (defined $descr) {
2478                 chomp $descr;
2479         }
2480         return $descr;
2481 }
2482
2483 sub git_get_project_ctags {
2484         my $path = shift;
2485         my $ctags = {};
2486
2487         $git_dir = "$projectroot/$path";
2488         opendir my $dh, "$git_dir/ctags"
2489                 or return $ctags;
2490         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2491                 open my $ct, '<', $_ or next;
2492                 my $val = <$ct>;
2493                 chomp $val;
2494                 close $ct;
2495                 my $ctag = $_; $ctag =~ s#.*/##;
2496                 $ctags->{$ctag} = $val;
2497         }
2498         closedir $dh;
2499         $ctags;
2500 }
2501
2502 sub git_populate_project_tagcloud {
2503         my $ctags = shift;
2504
2505         # First, merge different-cased tags; tags vote on casing
2506         my %ctags_lc;
2507         foreach (keys %$ctags) {
2508                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2509                 if (not $ctags_lc{lc $_}->{topcount}
2510                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2511                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2512                         $ctags_lc{lc $_}->{topname} = $_;
2513                 }
2514         }
2515
2516         my $cloud;
2517         if (eval { require HTML::TagCloud; 1; }) {
2518                 $cloud = HTML::TagCloud->new;
2519                 foreach (sort keys %ctags_lc) {
2520                         # Pad the title with spaces so that the cloud looks
2521                         # less crammed.
2522                         my $title = $ctags_lc{$_}->{topname};
2523                         $title =~ s/ /&nbsp;/g;
2524                         $title =~ s/^/&nbsp;/g;
2525                         $title =~ s/$/&nbsp;/g;
2526                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2527                 }
2528         } else {
2529                 $cloud = \%ctags_lc;
2530         }
2531         $cloud;
2532 }
2533
2534 sub git_show_project_tagcloud {
2535         my ($cloud, $count) = @_;
2536         print STDERR ref($cloud)."..\n";
2537         if (ref $cloud eq 'HTML::TagCloud') {
2538                 return $cloud->html_and_css($count);
2539         } else {
2540                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2541                 return '<p align="center">' . join (', ', map {
2542                         $cgi->a({-href=>"$home_link?by_tag=$_"}, $cloud->{$_}->{topname})
2543                 } splice(@tags, 0, $count)) . '</p>';
2544         }
2545 }
2546
2547 sub git_get_project_url_list {
2548         my $path = shift;
2549
2550         $git_dir = "$projectroot/$path";
2551         open my $fd, '<', "$git_dir/cloneurl"
2552                 or return wantarray ?
2553                 @{ config_to_multi(git_get_project_config('url')) } :
2554                    config_to_multi(git_get_project_config('url'));
2555         my @git_project_url_list = map { chomp; $_ } <$fd>;
2556         close $fd;
2557
2558         return wantarray ? @git_project_url_list : \@git_project_url_list;
2559 }
2560
2561 sub git_get_projects_list {
2562         my ($filter) = @_;
2563         my @list;
2564
2565         $filter ||= '';
2566         $filter =~ s/\.git$//;
2567
2568         my $check_forks = gitweb_check_feature('forks');
2569
2570         if (-d $projects_list) {
2571                 # search in directory
2572                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2573                 # remove the trailing "/"
2574                 $dir =~ s!/+$!!;
2575                 my $pfxlen = length("$dir");
2576                 my $pfxdepth = ($dir =~ tr!/!!);
2577
2578                 File::Find::find({
2579                         follow_fast => 1, # follow symbolic links
2580                         follow_skip => 2, # ignore duplicates
2581                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2582                         wanted => sub {
2583                                 # global variables
2584                                 our $project_maxdepth;
2585                                 our $projectroot;
2586                                 # skip project-list toplevel, if we get it.
2587                                 return if (m!^[/.]$!);
2588                                 # only directories can be git repositories
2589                                 return unless (-d $_);
2590                                 # don't traverse too deep (Find is super slow on os x)
2591                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2592                                         $File::Find::prune = 1;
2593                                         return;
2594                                 }
2595
2596                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2597                                 # we check related file in $projectroot
2598                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2599                                 if (check_export_ok("$projectroot/$path")) {
2600                                         push @list, { path => $path };
2601                                         $File::Find::prune = 1;
2602                                 }
2603                         },
2604                 }, "$dir");
2605
2606         } elsif (-f $projects_list) {
2607                 # read from file(url-encoded):
2608                 # 'git%2Fgit.git Linus+Torvalds'
2609                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2610                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2611                 my %paths;
2612                 open my $fd, '<', $projects_list or return;
2613         PROJECT:
2614                 while (my $line = <$fd>) {
2615                         chomp $line;
2616                         my ($path, $owner) = split ' ', $line;
2617                         $path = unescape($path);
2618                         $owner = unescape($owner);
2619                         if (!defined $path) {
2620                                 next;
2621                         }
2622                         if ($filter ne '') {
2623                                 # looking for forks;
2624                                 my $pfx = substr($path, 0, length($filter));
2625                                 if ($pfx ne $filter) {
2626                                         next PROJECT;
2627                                 }
2628                                 my $sfx = substr($path, length($filter));
2629                                 if ($sfx !~ /^\/.*\.git$/) {
2630                                         next PROJECT;
2631                                 }
2632                         } elsif ($check_forks) {
2633                         PATH:
2634                                 foreach my $filter (keys %paths) {
2635                                         # looking for forks;
2636                                         my $pfx = substr($path, 0, length($filter));
2637                                         if ($pfx ne $filter) {
2638                                                 next PATH;
2639                                         }
2640                                         my $sfx = substr($path, length($filter));
2641                                         if ($sfx !~ /^\/.*\.git$/) {
2642                                                 next PATH;
2643                                         }
2644                                         # is a fork, don't include it in
2645                                         # the list
2646                                         next PROJECT;
2647                                 }
2648                         }
2649                         if (check_export_ok("$projectroot/$path")) {
2650                                 my $pr = {
2651                                         path => $path,
2652                                         owner => to_utf8($owner),
2653                                 };
2654                                 push @list, $pr;
2655                                 (my $forks_path = $path) =~ s/\.git$//;
2656                                 $paths{$forks_path}++;
2657                         }
2658                 }
2659                 close $fd;
2660         }
2661         return @list;
2662 }
2663
2664 our $gitweb_project_owner = undef;
2665 sub git_get_project_list_from_file {
2666
2667         return if (defined $gitweb_project_owner);
2668
2669         $gitweb_project_owner = {};
2670         # read from file (url-encoded):
2671         # 'git%2Fgit.git Linus+Torvalds'
2672         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2673         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2674         if (-f $projects_list) {
2675                 open(my $fd, '<', $projects_list);
2676                 while (my $line = <$fd>) {
2677                         chomp $line;
2678                         my ($pr, $ow) = split ' ', $line;
2679                         $pr = unescape($pr);
2680                         $ow = unescape($ow);
2681                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2682                 }
2683                 close $fd;
2684         }
2685 }
2686
2687 sub git_get_project_owner {
2688         my $project = shift;
2689         my $owner;
2690
2691         return undef unless $project;
2692         $git_dir = "$projectroot/$project";
2693
2694         if (!defined $gitweb_project_owner) {
2695                 git_get_project_list_from_file();
2696         }
2697
2698         if (exists $gitweb_project_owner->{$project}) {
2699                 $owner = $gitweb_project_owner->{$project};
2700         }
2701         if (!defined $owner){
2702                 $owner = git_get_project_config('owner');
2703         }
2704         if (!defined $owner) {
2705                 $owner = get_file_owner("$git_dir");
2706         }
2707
2708         return $owner;
2709 }
2710
2711 sub git_get_last_activity {
2712         my ($path) = @_;
2713         my $fd;
2714
2715         $git_dir = "$projectroot/$path";
2716         open($fd, "-|", git_cmd(), 'for-each-ref',
2717              '--format=%(committer)',
2718              '--sort=-committerdate',
2719              '--count=1',
2720              'refs/heads') or return;
2721         my $most_recent = <$fd>;
2722         close $fd or return;
2723         if (defined $most_recent &&
2724             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2725                 my $timestamp = $1;
2726                 my $age = time - $timestamp;
2727                 return ($age, age_string($age));
2728         }
2729         return (undef, undef);
2730 }
2731
2732 sub git_get_references {
2733         my $type = shift || "";
2734         my %refs;
2735         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2736         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2737         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2738                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2739                 or return;
2740
2741         while (my $line = <$fd>) {
2742                 chomp $line;
2743                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2744                         if (defined $refs{$1}) {
2745                                 push @{$refs{$1}}, $2;
2746                         } else {
2747                                 $refs{$1} = [ $2 ];
2748                         }
2749                 }
2750         }
2751         close $fd or return;
2752         return \%refs;
2753 }
2754
2755 sub git_get_rev_name_tags {
2756         my $hash = shift || return undef;
2757
2758         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2759                 or return;
2760         my $name_rev = <$fd>;
2761         close $fd;
2762
2763         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2764                 return $1;
2765         } else {
2766                 # catches also '$hash undefined' output
2767                 return undef;
2768         }
2769 }
2770
2771 ## ----------------------------------------------------------------------
2772 ## parse to hash functions
2773
2774 sub parse_date {
2775         my $epoch = shift;
2776         my $tz = shift || "-0000";
2777
2778         my %date;
2779         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2780         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2781         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2782         $date{'hour'} = $hour;
2783         $date{'minute'} = $min;
2784         $date{'mday'} = $mday;
2785         $date{'day'} = $days[$wday];
2786         $date{'month'} = $months[$mon];
2787         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2788                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2789         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2790                              $mday, $months[$mon], $hour ,$min;
2791         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2792                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2793
2794         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2795         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2796         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2797         $date{'hour_local'} = $hour;
2798         $date{'minute_local'} = $min;
2799         $date{'tz_local'} = $tz;
2800         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2801                                   1900+$year, $mon+1, $mday,
2802                                   $hour, $min, $sec, $tz);
2803         return %date;
2804 }
2805
2806 sub parse_tag {
2807         my $tag_id = shift;
2808         my %tag;
2809         my @comment;
2810
2811         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2812         $tag{'id'} = $tag_id;
2813         while (my $line = <$fd>) {
2814                 chomp $line;
2815                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2816                         $tag{'object'} = $1;
2817                 } elsif ($line =~ m/^type (.+)$/) {
2818                         $tag{'type'} = $1;
2819                 } elsif ($line =~ m/^tag (.+)$/) {
2820                         $tag{'name'} = $1;
2821                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2822                         $tag{'author'} = $1;
2823                         $tag{'author_epoch'} = $2;
2824                         $tag{'author_tz'} = $3;
2825                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2826                                 $tag{'author_name'}  = $1;
2827                                 $tag{'author_email'} = $2;
2828                         } else {
2829                                 $tag{'author_name'} = $tag{'author'};
2830                         }
2831                 } elsif ($line =~ m/--BEGIN/) {
2832                         push @comment, $line;
2833                         last;
2834                 } elsif ($line eq "") {
2835                         last;
2836                 }
2837         }
2838         push @comment, <$fd>;
2839         $tag{'comment'} = \@comment;
2840         close $fd or return;
2841         if (!defined $tag{'name'}) {
2842                 return
2843         };
2844         return %tag
2845 }
2846
2847 sub parse_commit_text {
2848         my ($commit_text, $withparents) = @_;
2849         my @commit_lines = split '\n', $commit_text;
2850         my %co;
2851
2852         pop @commit_lines; # Remove '\0'
2853
2854         if (! @commit_lines) {
2855                 return;
2856         }
2857
2858         my $header = shift @commit_lines;
2859         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2860                 return;
2861         }
2862         ($co{'id'}, my @parents) = split ' ', $header;
2863         while (my $line = shift @commit_lines) {
2864                 last if $line eq "\n";
2865                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2866                         $co{'tree'} = $1;
2867                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2868                         push @parents, $1;
2869                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2870                         $co{'author'} = to_utf8($1);
2871                         $co{'author_epoch'} = $2;
2872                         $co{'author_tz'} = $3;
2873                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2874                                 $co{'author_name'}  = $1;
2875                                 $co{'author_email'} = $2;
2876                         } else {
2877                                 $co{'author_name'} = $co{'author'};
2878                         }
2879                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2880                         $co{'committer'} = to_utf8($1);
2881                         $co{'committer_epoch'} = $2;
2882                         $co{'committer_tz'} = $3;
2883                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2884                                 $co{'committer_name'}  = $1;
2885                                 $co{'committer_email'} = $2;
2886                         } else {
2887                                 $co{'committer_name'} = $co{'committer'};
2888                         }
2889                 }
2890         }
2891         if (!defined $co{'tree'}) {
2892                 return;
2893         };
2894         $co{'parents'} = \@parents;
2895         $co{'parent'} = $parents[0];
2896
2897         foreach my $title (@commit_lines) {
2898                 $title =~ s/^    //;
2899                 if ($title ne "") {
2900                         $co{'title'} = chop_str($title, 80, 5);
2901                         # remove leading stuff of merges to make the interesting part visible
2902                         if (length($title) > 50) {
2903                                 $title =~ s/^Automatic //;
2904                                 $title =~ s/^merge (of|with) /Merge ... /i;
2905                                 if (length($title) > 50) {
2906                                         $title =~ s/(http|rsync):\/\///;
2907                                 }
2908                                 if (length($title) > 50) {
2909                                         $title =~ s/(master|www|rsync)\.//;
2910                                 }
2911                                 if (length($title) > 50) {
2912                                         $title =~ s/kernel.org:?//;
2913                                 }
2914                                 if (length($title) > 50) {
2915                                         $title =~ s/\/pub\/scm//;
2916                                 }
2917                         }
2918                         $co{'title_short'} = chop_str($title, 50, 5);
2919                         last;
2920                 }
2921         }
2922         if (! defined $co{'title'} || $co{'title'} eq "") {
2923                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2924         }
2925         # remove added spaces
2926         foreach my $line (@commit_lines) {
2927                 $line =~ s/^    //;
2928         }
2929         $co{'comment'} = \@commit_lines;
2930
2931         my $age = time - $co{'committer_epoch'};
2932         $co{'age'} = $age;
2933         $co{'age_string'} = age_string($age);
2934         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2935         if ($age > 60*60*24*7*2) {
2936                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2937                 $co{'age_string_age'} = $co{'age_string'};
2938         } else {
2939                 $co{'age_string_date'} = $co{'age_string'};
2940                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2941         }
2942         return %co;
2943 }
2944
2945 sub parse_commit {
2946         my ($commit_id) = @_;
2947         my %co;
2948
2949         local $/ = "\0";
2950
2951         open my $fd, "-|", git_cmd(), "rev-list",
2952                 "--parents",
2953                 "--header",
2954                 "--max-count=1",
2955                 $commit_id,
2956                 "--",
2957                 or die_error(500, "Open git-rev-list failed");
2958         %co = parse_commit_text(<$fd>, 1);
2959         close $fd;
2960
2961         return %co;
2962 }
2963
2964 sub parse_commits {
2965         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2966         my @cos;
2967
2968         $maxcount ||= 1;
2969         $skip ||= 0;
2970
2971         local $/ = "\0";
2972
2973         open my $fd, "-|", git_cmd(), "rev-list",
2974                 "--header",
2975                 @args,
2976                 ("--max-count=" . $maxcount),
2977                 ("--skip=" . $skip),
2978                 @extra_options,
2979                 $commit_id,
2980                 "--",
2981                 ($filename ? ($filename) : ())
2982                 or die_error(500, "Open git-rev-list failed");
2983         while (my $line = <$fd>) {
2984                 my %co = parse_commit_text($line);
2985                 push @cos, \%co;
2986         }
2987         close $fd;
2988
2989         return wantarray ? @cos : \@cos;
2990 }
2991
2992 # parse line of git-diff-tree "raw" output
2993 sub parse_difftree_raw_line {
2994         my $line = shift;
2995         my %res;
2996
2997         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2998         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2999         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
3000                 $res{'from_mode'} = $1;
3001                 $res{'to_mode'} = $2;
3002                 $res{'from_id'} = $3;
3003                 $res{'to_id'} = $4;
3004                 $res{'status'} = $5;
3005                 $res{'similarity'} = $6;
3006                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
3007                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
3008                 } else {
3009                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
3010                 }
3011         }
3012         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
3013         # combined diff (for merge commit)
3014         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
3015                 $res{'nparents'}  = length($1);
3016                 $res{'from_mode'} = [ split(' ', $2) ];
3017                 $res{'to_mode'} = pop @{$res{'from_mode'}};
3018                 $res{'from_id'} = [ split(' ', $3) ];
3019                 $res{'to_id'} = pop @{$res{'from_id'}};
3020                 $res{'status'} = [ split('', $4) ];
3021                 $res{'to_file'} = unquote($5);
3022         }
3023         # 'c512b523472485aef4fff9e57b229d9d243c967f'
3024         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
3025                 $res{'commit'} = $1;
3026         }
3027
3028         return wantarray ? %res : \%res;
3029 }
3030
3031 # wrapper: return parsed line of git-diff-tree "raw" output
3032 # (the argument might be raw line, or parsed info)
3033 sub parsed_difftree_line {
3034         my $line_or_ref = shift;
3035
3036         if (ref($line_or_ref) eq "HASH") {
3037                 # pre-parsed (or generated by hand)
3038                 return $line_or_ref;
3039         } else {
3040                 return parse_difftree_raw_line($line_or_ref);
3041         }
3042 }
3043
3044 # parse line of git-ls-tree output
3045 sub parse_ls_tree_line {
3046         my $line = shift;
3047         my %opts = @_;
3048         my %res;
3049
3050         if ($opts{'-l'}) {
3051                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
3052                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
3053
3054                 $res{'mode'} = $1;
3055                 $res{'type'} = $2;
3056                 $res{'hash'} = $3;
3057                 $res{'size'} = $4;
3058                 if ($opts{'-z'}) {
3059                         $res{'name'} = $5;
3060                 } else {
3061                         $res{'name'} = unquote($5);
3062                 }
3063         } else {
3064                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
3065                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
3066
3067                 $res{'mode'} = $1;
3068                 $res{'type'} = $2;
3069                 $res{'hash'} = $3;
3070                 if ($opts{'-z'}) {
3071                         $res{'name'} = $4;
3072                 } else {
3073                         $res{'name'} = unquote($4);
3074                 }
3075         }
3076
3077         return wantarray ? %res : \%res;
3078 }
3079
3080 # generates _two_ hashes, references to which are passed as 2 and 3 argument
3081 sub parse_from_to_diffinfo {
3082         my ($diffinfo, $from, $to, @parents) = @_;
3083
3084         if ($diffinfo->{'nparents'}) {
3085                 # combined diff
3086                 $from->{'file'} = [];
3087                 $from->{'href'} = [];
3088                 fill_from_file_info($diffinfo, @parents)
3089                         unless exists $diffinfo->{'from_file'};
3090                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
3091                         $from->{'file'}[$i] =
3092                                 defined $diffinfo->{'from_file'}[$i] ?
3093                                         $diffinfo->{'from_file'}[$i] :
3094                                         $diffinfo->{'to_file'};
3095                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
3096                                 $from->{'href'}[$i] = href(action=>"blob",
3097                                                            hash_base=>$parents[$i],
3098                                                            hash=>$diffinfo->{'from_id'}[$i],
3099                                                            file_name=>$from->{'file'}[$i]);
3100                         } else {
3101                                 $from->{'href'}[$i] = undef;
3102                         }
3103                 }
3104         } else {
3105                 # ordinary (not combined) diff
3106                 $from->{'file'} = $diffinfo->{'from_file'};
3107                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
3108                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
3109                                                hash=>$diffinfo->{'from_id'},
3110                                                file_name=>$from->{'file'});
3111                 } else {
3112                         delete $from->{'href'};
3113                 }
3114         }
3115
3116         $to->{'file'} = $diffinfo->{'to_file'};
3117         if (!is_deleted($diffinfo)) { # file exists in result
3118                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
3119                                      hash=>$diffinfo->{'to_id'},
3120                                      file_name=>$to->{'file'});
3121         } else {
3122                 delete $to->{'href'};
3123         }
3124 }
3125
3126 ## ......................................................................
3127 ## parse to array of hashes functions
3128
3129 sub git_get_heads_list {
3130         my $limit = shift;
3131         my @headslist;
3132
3133         open my $fd, '-|', git_cmd(), 'for-each-ref',
3134                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
3135                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
3136                 'refs/heads'
3137                 or return;
3138         while (my $line = <$fd>) {
3139                 my %ref_item;
3140
3141                 chomp $line;
3142                 my ($refinfo, $committerinfo) = split(/\0/, $line);
3143                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
3144                 my ($committer, $epoch, $tz) =
3145                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
3146                 $ref_item{'fullname'}  = $name;
3147                 $name =~ s!^refs/heads/!!;
3148
3149                 $ref_item{'name'}  = $name;
3150                 $ref_item{'id'}    = $hash;
3151                 $ref_item{'title'} = $title || '(no commit message)';
3152                 $ref_item{'epoch'} = $epoch;
3153                 if ($epoch) {
3154                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3155                 } else {
3156                         $ref_item{'age'} = "unknown";
3157                 }
3158
3159                 push @headslist, \%ref_item;
3160         }
3161         close $fd;
3162
3163         return wantarray ? @headslist : \@headslist;
3164 }
3165
3166 sub git_get_tags_list {
3167         my $limit = shift;
3168         my @tagslist;
3169
3170         open my $fd, '-|', git_cmd(), 'for-each-ref',
3171                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
3172                 '--format=%(objectname) %(objecttype) %(refname) '.
3173                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
3174                 'refs/tags'
3175                 or return;
3176         while (my $line = <$fd>) {
3177                 my %ref_item;
3178
3179                 chomp $line;
3180                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
3181                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
3182                 my ($creator, $epoch, $tz) =
3183                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
3184                 $ref_item{'fullname'} = $name;
3185                 $name =~ s!^refs/tags/!!;
3186
3187                 $ref_item{'type'} = $type;
3188                 $ref_item{'id'} = $id;
3189                 $ref_item{'name'} = $name;
3190                 if ($type eq "tag") {
3191                         $ref_item{'subject'} = $title;
3192                         $ref_item{'reftype'} = $reftype;
3193                         $ref_item{'refid'}   = $refid;
3194                 } else {
3195                         $ref_item{'reftype'} = $type;
3196                         $ref_item{'refid'}   = $id;
3197                 }
3198
3199                 if ($type eq "tag" || $type eq "commit") {
3200                         $ref_item{'epoch'} = $epoch;
3201                         if ($epoch) {
3202                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
3203                         } else {
3204                                 $ref_item{'age'} = "unknown";
3205                         }
3206                 }
3207
3208                 push @tagslist, \%ref_item;
3209         }
3210         close $fd;
3211
3212         return wantarray ? @tagslist : \@tagslist;
3213 }
3214
3215 ## ----------------------------------------------------------------------
3216 ## filesystem-related functions
3217
3218 sub get_file_owner {
3219         my $path = shift;
3220
3221         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
3222         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
3223         if (!defined $gcos) {
3224                 return undef;
3225         }
3226         my $owner = $gcos;
3227         $owner =~ s/[,;].*$//;
3228         return to_utf8($owner);
3229 }
3230
3231 # assume that file exists
3232 sub insert_file {
3233         my $filename = shift;
3234
3235         open my $fd, '<', $filename;
3236         print map { to_utf8($_) } <$fd>;
3237         close $fd;
3238 }
3239
3240 ## ......................................................................
3241 ## mimetype related functions
3242
3243 sub mimetype_guess_file {
3244         my $filename = shift;
3245         my $mimemap = shift;
3246         -r $mimemap or return undef;
3247
3248         my %mimemap;
3249         open(my $mh, '<', $mimemap) or return undef;
3250         while (<$mh>) {
3251                 next if m/^#/; # skip comments
3252                 my ($mimetype, $exts) = split(/\t+/);
3253                 if (defined $exts) {
3254                         my @exts = split(/\s+/, $exts);
3255                         foreach my $ext (@exts) {
3256                                 $mimemap{$ext} = $mimetype;
3257                         }
3258                 }
3259         }
3260         close($mh);
3261
3262         $filename =~ /\.([^.]*)$/;
3263         return $mimemap{$1};
3264 }
3265
3266 sub mimetype_guess {
3267         my $filename = shift;
3268         my $mime;
3269         $filename =~ /\./ or return undef;
3270
3271         if ($mimetypes_file) {
3272                 my $file = $mimetypes_file;
3273                 if ($file !~ m!^/!) { # if it is relative path
3274                         # it is relative to project
3275                         $file = "$projectroot/$project/$file";
3276                 }
3277                 $mime = mimetype_guess_file($filename, $file);
3278         }
3279         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3280         return $mime;
3281 }
3282
3283 sub blob_mimetype {
3284         my $fd = shift;
3285         my $filename = shift;
3286
3287         if ($filename) {
3288                 my $mime = mimetype_guess($filename);
3289                 $mime and return $mime;
3290         }
3291
3292         # just in case
3293         return $default_blob_plain_mimetype unless $fd;
3294
3295         if (-T $fd) {
3296                 return 'text/plain';
3297         } elsif (! $filename) {
3298                 return 'application/octet-stream';
3299         } elsif ($filename =~ m/\.png$/i) {
3300                 return 'image/png';
3301         } elsif ($filename =~ m/\.gif$/i) {
3302                 return 'image/gif';
3303         } elsif ($filename =~ m/\.jpe?g$/i) {
3304                 return 'image/jpeg';
3305         } else {
3306                 return 'application/octet-stream';
3307         }
3308 }
3309
3310 sub blob_contenttype {
3311         my ($fd, $file_name, $type) = @_;
3312
3313         $type ||= blob_mimetype($fd, $file_name);
3314         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3315                 $type .= "; charset=$default_text_plain_charset";
3316         }
3317
3318         return $type;
3319 }
3320
3321 # guess file syntax for syntax highlighting; return undef if no highlighting
3322 # the name of syntax can (in the future) depend on syntax highlighter used
3323 sub guess_file_syntax {
3324         my ($highlight, $mimetype, $file_name) = @_;
3325         return undef unless ($highlight && defined $file_name);
3326
3327         # configuration for 'highlight' (http://www.andre-simon.de/)
3328         # match by basename
3329         my %highlight_basename = (
3330                 #'Program' => 'py',
3331                 #'Library' => 'py',
3332                 'SConstruct' => 'py', # SCons equivalent of Makefile
3333                 'Makefile' => 'make',
3334         );
3335         # match by extension
3336         my %highlight_ext = (
3337                 # main extensions, defining name of syntax;
3338                 # see files in /usr/share/highlight/langDefs/ directory
3339                 map { $_ => $_ }
3340                         qw(py c cpp rb java css php sh pl js tex bib xml awk bat ini spec tcl),
3341                 # alternate extensions, see /etc/highlight/filetypes.conf
3342                 'h' => 'c',
3343                 map { $_ => 'cpp' } qw(cxx c++ cc),
3344                 map { $_ => 'php' } qw(php3 php4),
3345                 map { $_ => 'pl'  } qw(perl pm), # perhaps also 'cgi'
3346                 'mak' => 'make',
3347                 map { $_ => 'xml' } qw(xhtml html htm),
3348         );
3349
3350         my $basename = basename($file_name, '.in');
3351         return $highlight_basename{$basename}
3352                 if exists $highlight_basename{$basename};
3353
3354         $basename =~ /\.([^.]*)$/;
3355         my $ext = $1 or return undef;
3356         return $highlight_ext{$ext}
3357                 if exists $highlight_ext{$ext};
3358
3359         return undef;
3360 }
3361
3362 # run highlighter and return FD of its output,
3363 # or return original FD if no highlighting
3364 sub run_highlighter {
3365         my ($fd, $highlight, $syntax) = @_;
3366         return $fd unless ($highlight && defined $syntax);
3367
3368         close $fd
3369                 or die_error(404, "Reading blob failed");
3370         open $fd, quote_command(git_cmd(), "cat-file", "blob", $hash)." | ".
3371                   "highlight --xhtml --fragment --syntax $syntax |"
3372                 or die_error(500, "Couldn't open file or run syntax highlighter");
3373         return $fd;
3374 }
3375
3376 ## ======================================================================
3377 ## functions printing HTML: header, footer, error page
3378
3379 sub get_page_title {
3380         my $title = to_utf8($site_name);
3381
3382         return $title unless (defined $project);
3383         $title .= " - " . to_utf8($project);
3384
3385         return $title unless (defined $action);
3386         $title .= "/$action"; # $action is US-ASCII (7bit ASCII)
3387
3388         return $title unless (defined $file_name);
3389         $title .= " - " . esc_path($file_name);
3390         if ($action eq "tree" && $file_name !~ m|/$|) {
3391                 $title .= "/";
3392         }
3393
3394         return $title;
3395 }
3396
3397 sub git_header_html {
3398         my $status = shift || "200 OK";
3399         my $expires = shift;
3400         my %opts = @_;
3401
3402         my $title = get_page_title();
3403         my $content_type;
3404         # require explicit support from the UA if we are to send the page as
3405         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3406         # we have to do this because MSIE sometimes globs '*/*', pretending to
3407         # support xhtml+xml but choking when it gets what it asked for.
3408         if (defined $cgi->http('HTTP_ACCEPT') &&
3409             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3410             $cgi->Accept('application/xhtml+xml') != 0) {
3411                 $content_type = 'application/xhtml+xml';
3412         } else {
3413                 $content_type = 'text/html';
3414         }
3415         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3416                            -status=> $status, -expires => $expires)
3417                 unless ($opts{'-no_http_header'});
3418         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3419         print <<EOF;
3420 <?xml version="1.0" encoding="utf-8"?>
3421 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3422 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3423 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3424 <!-- git core binaries version $git_version -->
3425 <head>
3426 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3427 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3428 <meta name="robots" content="index, nofollow"/>
3429 <title>$title</title>
3430 EOF
3431         # the stylesheet, favicon etc urls won't work correctly with path_info
3432         # unless we set the appropriate base URL
3433         if ($ENV{'PATH_INFO'}) {
3434                 print "<base href=\"".esc_url($base_url)."\" />\n";
3435         }
3436         # print out each stylesheet that exist, providing backwards capability
3437         # for those people who defined $stylesheet in a config file
3438         if (defined $stylesheet) {
3439                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3440         } else {
3441                 foreach my $stylesheet (@stylesheets) {
3442                         next unless $stylesheet;
3443                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3444                 }
3445         }
3446         if (defined $project) {
3447                 my %href_params = get_feed_info();
3448                 if (!exists $href_params{'-title'}) {
3449                         $href_params{'-title'} = 'log';
3450                 }
3451
3452                 foreach my $format qw(RSS Atom) {
3453                         my $type = lc($format);
3454                         my %link_attr = (
3455                                 '-rel' => 'alternate',
3456                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3457                                 '-type' => "application/$type+xml"
3458                         );
3459
3460                         $href_params{'action'} = $type;
3461                         $link_attr{'-href'} = href(%href_params);
3462                         print "<link ".
3463                               "rel=\"$link_attr{'-rel'}\" ".
3464                               "title=\"$link_attr{'-title'}\" ".
3465                               "href=\"$link_attr{'-href'}\" ".
3466                               "type=\"$link_attr{'-type'}\" ".
3467                               "/>\n";
3468
3469                         $href_params{'extra_options'} = '--no-merges';
3470                         $link_attr{'-href'} = href(%href_params);
3471                         $link_attr{'-title'} .= ' (no merges)';
3472                         print "<link ".
3473                               "rel=\"$link_attr{'-rel'}\" ".
3474                               "title=\"$link_attr{'-title'}\" ".
3475                               "href=\"$link_attr{'-href'}\" ".
3476                               "type=\"$link_attr{'-type'}\" ".
3477                               "/>\n";
3478                 }
3479
3480         } else {
3481                 printf('<link rel="alternate" title="%s projects list" '.
3482                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3483                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3484                 printf('<link rel="alternate" title="%s projects feeds" '.
3485                        'href="%s" type="text/x-opml" />'."\n",
3486                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3487         }
3488         if (defined $favicon) {
3489                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3490         }
3491
3492         print "</head>\n" .
3493               "<body>\n";
3494
3495         if (defined $site_header && -f $site_header) {
3496                 insert_file($site_header);
3497         }
3498
3499         print "<div class=\"page_header\">\n";
3500         if (defined $logo) {
3501                 print $cgi->a({-href => esc_url($logo_url),
3502                                -title => $logo_label},
3503                               qq(<img src=").esc_url($logo).qq(" width="72" height="27" alt="git" class="logo"/>));
3504         }
3505         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3506         if (defined $project) {
3507                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3508                 if (defined $action) {
3509                         print " / $action";
3510                 }
3511                 print "\n";
3512         }
3513         print "</div>\n";
3514
3515         my $have_search = gitweb_check_feature('search');
3516         if (defined $project && $have_search) {
3517                 if (!defined $searchtext) {
3518                         $searchtext = "";
3519                 }
3520                 my $search_hash;
3521                 if (defined $hash_base) {
3522                         $search_hash = $hash_base;
3523                 } elsif (defined $hash) {
3524                         $search_hash = $hash;
3525                 } else {
3526                         $search_hash = "HEAD";
3527                 }
3528                 my $action = $my_uri;
3529                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3530                 if ($use_pathinfo) {
3531                         $action .= "/".esc_url($project);
3532                 }
3533                 print $cgi->startform(-method => "get", -action => $action) .
3534                       "<div class=\"search\">\n" .
3535                       (!$use_pathinfo &&
3536                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3537                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3538                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3539                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3540                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3541                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3542                       " search:\n",
3543                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3544                       "<span title=\"Extended regular expression\">" .
3545                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3546                                      -checked => $search_use_regexp) .
3547                       "</span>" .
3548                       "</div>" .
3549                       $cgi->end_form() . "\n";
3550         }
3551 }
3552
3553 sub git_footer_html {
3554         my $feed_class = 'rss_logo';
3555
3556         print "<div class=\"page_footer\">\n";
3557         if (defined $project) {
3558                 my $descr = git_get_project_description($project);
3559                 if (defined $descr) {
3560                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3561                 }
3562
3563                 my %href_params = get_feed_info();
3564                 if (!%href_params) {
3565                         $feed_class .= ' generic';
3566                 }
3567                 $href_params{'-title'} ||= 'log';
3568
3569                 foreach my $format qw(RSS Atom) {
3570                         $href_params{'action'} = lc($format);
3571                         print $cgi->a({-href => href(%href_params),
3572                                       -title => "$href_params{'-title'} $format feed",
3573                                       -class => $feed_class}, $format)."\n";
3574                 }
3575
3576         } else {
3577                 print "<div class=\"page_footer_text\">Copyright &copy; 2013, <a href=\"http://nexus-irc.de\">Nexus-IRC.de</a></div>\n";
3578                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3579                               -class => $feed_class}, "OPML") . " ";
3580                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3581                               -class => $feed_class}, "TXT") . "\n";
3582         }
3583         print "</div>\n"; # class="page_footer"
3584
3585         if (defined $t0 && gitweb_check_feature('timed')) {
3586                 print "<div id=\"generating_info\">\n";
3587                 print 'This page took '.
3588                       '<span id="generating_time" class="time_span">'.
3589                       Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
3590                       ' seconds </span>'.
3591                       ' and '.
3592                       '<span id="generating_cmd">'.
3593                       $number_of_git_cmds.
3594                       '</span> git commands '.
3595                       " to generate.\n";
3596                 print "</div>\n"; # class="page_footer"
3597         }
3598
3599         if (defined $site_footer && -f $site_footer) {
3600                 insert_file($site_footer);
3601         }
3602
3603         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
3604         if (defined $action &&
3605             $action eq 'blame_incremental') {
3606                 print qq!<script type="text/javascript">\n!.
3607                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3608                       qq!           "!. href() .qq!");\n!.
3609                       qq!</script>\n!;
3610         } elsif (gitweb_check_feature('javascript-actions')) {
3611                 print qq!<script type="text/javascript">\n!.
3612                       qq!window.onload = fixLinks;\n!.
3613                       qq!</script>\n!;
3614         }
3615
3616         print "</body>\n" .
3617               "</html>";
3618 }
3619
3620 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3621 # Example: die_error(404, 'Hash not found')
3622 # By convention, use the following status codes (as defined in RFC 2616):
3623 # 400: Invalid or missing CGI parameters, or
3624 #      requested object exists but has wrong type.
3625 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3626 #      this server or project.
3627 # 404: Requested object/revision/project doesn't exist.
3628 # 500: The server isn't configured properly, or
3629 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3630 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3631 # 503: The server is currently unavailable (because it is overloaded,
3632 #      or down for maintenance).  Generally, this is a temporary state.
3633 sub die_error {
3634         my $status = shift || 500;
3635         my $error = esc_html(shift) || "Internal Server Error";
3636         my $extra = shift;
3637         my %opts = @_;
3638
3639         my %http_responses = (
3640                 400 => '400 Bad Request',
3641                 403 => '403 Forbidden',
3642                 404 => '404 Not Found',
3643                 500 => '500 Internal Server Error',
3644                 503 => '503 Service Unavailable',
3645         );
3646         git_header_html($http_responses{$status}, undef, %opts);
3647         print <<EOF;
3648 <div class="page_body">
3649 <br /><br />
3650 $status - $error
3651 <br />
3652 EOF
3653         if (defined $extra) {
3654                 print "<hr />\n" .
3655                       "$extra\n";
3656         }
3657         print "</div>\n";
3658
3659         git_footer_html();
3660         goto DONE_GITWEB
3661                 unless ($opts{'-error_handler'});
3662 }
3663
3664 ## ----------------------------------------------------------------------
3665 ## functions printing or outputting HTML: navigation
3666
3667 sub git_print_page_nav {
3668         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3669         $extra = '' if !defined $extra; # pager or formats
3670
3671         my @navs = qw(summary shortlog log commit commitdiff tree);
3672         if ($suppress) {
3673                 @navs = grep { $_ ne $suppress } @navs;
3674         }
3675
3676         my %arg = map { $_ => {action=>$_} } @navs;
3677         if (defined $head) {
3678                 for (qw(commit commitdiff)) {
3679                         $arg{$_}{'hash'} = $head;
3680                 }
3681                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3682                         for (qw(shortlog log)) {
3683                                 $arg{$_}{'hash'} = $head;
3684                         }
3685                 }
3686         }
3687
3688         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3689         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3690
3691         my @actions = gitweb_get_feature('actions');
3692         my %repl = (
3693                 '%' => '%',
3694                 'n' => $project,         # project name
3695                 'f' => $git_dir,         # project path within filesystem
3696                 'h' => $treehead || '',  # current hash ('h' parameter)
3697                 'b' => $treebase || '',  # hash base ('hb' parameter)
3698         );
3699         while (@actions) {
3700                 my ($label, $link, $pos) = splice(@actions,0,3);
3701                 # insert
3702                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3703                 # munch munch
3704                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3705                 $arg{$label}{'_href'} = $link;
3706         }
3707
3708         print "<div class=\"page_nav\">\n" .
3709                 (join " | ",
3710                  map { $_ eq $current ?
3711                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3712                  } @navs);
3713         print "<br/>\n$extra<br/>\n" .
3714               "</div>\n";
3715 }
3716
3717 sub format_paging_nav {
3718         my ($action, $page, $has_next_link) = @_;
3719         my $paging_nav;
3720
3721
3722         if ($page > 0) {
3723                 $paging_nav .=
3724                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3725                         " &sdot; " .
3726                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3727                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3728         } else {
3729                 $paging_nav .= "first &sdot; prev";
3730         }
3731
3732         if ($has_next_link) {
3733                 $paging_nav .= " &sdot; " .
3734                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3735                                  -accesskey => "n", -title => "Alt-n"}, "next");
3736         } else {
3737                 $paging_nav .= " &sdot; next";
3738         }
3739
3740         return $paging_nav;
3741 }
3742
3743 ## ......................................................................
3744 ## functions printing or outputting HTML: div
3745
3746 sub git_print_header_div {
3747         my ($action, $title, $hash, $hash_base) = @_;
3748         my %args = ();
3749
3750         $args{'action'} = $action;
3751         $args{'hash'} = $hash if $hash;
3752         $args{'hash_base'} = $hash_base if $hash_base;
3753
3754         print "<div class=\"header\">\n" .
3755               $cgi->a({-href => href(%args), -class => "title"},
3756               $title ? $title : $action) .
3757               "\n</div>\n";
3758 }
3759
3760 sub print_local_time {
3761         print format_local_time(@_);
3762 }
3763
3764 sub format_local_time {
3765         my $localtime = '';
3766         my %date = @_;
3767         if ($date{'hour_local'} < 6) {
3768                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3769                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3770         } else {
3771                 $localtime .= sprintf(" (%02d:%02d %s)",
3772                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3773         }
3774
3775         return $localtime;
3776 }
3777
3778 # Outputs the author name and date in long form
3779 sub git_print_authorship {
3780         my $co = shift;
3781         my %opts = @_;
3782         my $tag = $opts{-tag} || 'div';
3783         my $author = $co->{'author_name'};
3784
3785         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3786         print "<$tag class=\"author_date\">" .
3787               format_search_author($author, "author", esc_html($author)) .
3788               " [$ad{'rfc2822'}";
3789         print_local_time(%ad) if ($opts{-localtime});
3790         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3791                   . "</$tag>\n";
3792 }
3793
3794 # Outputs table rows containing the full author or committer information,
3795 # in the format expected for 'commit' view (& similar).
3796 # Parameters are a commit hash reference, followed by the list of people
3797 # to output information for. If the list is empty it defaults to both
3798 # author and committer.
3799 sub git_print_authorship_rows {
3800         my $co = shift;
3801         # too bad we can't use @people = @_ || ('author', 'committer')
3802         my @people = @_;
3803         @people = ('author', 'committer') unless @people;
3804         foreach my $who (@people) {
3805                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3806                 print "<tr><td>$who</td><td>" .
3807                       format_search_author($co->{"${who}_name"}, $who,
3808                                esc_html($co->{"${who}_name"})) . " " .
3809                       format_search_author($co->{"${who}_email"}, $who,
3810                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3811                       "</td><td rowspan=\"2\">" .
3812                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3813                       "</td></tr>\n" .
3814                       "<tr>" .
3815                       "<td></td><td> $wd{'rfc2822'}";
3816                 print_local_time(%wd);
3817                 print "</td>" .
3818                       "</tr>\n";
3819         }
3820 }
3821
3822 sub git_print_page_path {
3823         my $name = shift;
3824         my $type = shift;
3825         my $hb = shift;
3826
3827
3828         print "<div class=\"page_path\">";
3829         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3830                       -title => 'tree root'}, to_utf8("[$project]"));
3831         print " / ";
3832         if (defined $name) {
3833                 my @dirname = split '/', $name;
3834                 my $basename = pop @dirname;
3835                 my $fullname = '';
3836
3837                 foreach my $dir (@dirname) {
3838                         $fullname .= ($fullname ? '/' : '') . $dir;
3839                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3840                                                      hash_base=>$hb),
3841                                       -title => $fullname}, esc_path($dir));
3842                         print " / ";
3843                 }
3844                 if (defined $type && $type eq 'blob') {
3845                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3846                                                      hash_base=>$hb),
3847                                       -title => $name}, esc_path($basename));
3848                 } elsif (defined $type && $type eq 'tree') {
3849                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3850                                                      hash_base=>$hb),
3851                                       -title => $name}, esc_path($basename));
3852                         print " / ";
3853                 } else {
3854                         print esc_path($basename);
3855                 }
3856         }
3857         print "<br/></div>\n";
3858 }
3859
3860 sub git_print_log {
3861         my $log = shift;
3862         my %opts = @_;
3863
3864         if ($opts{'-remove_title'}) {
3865                 # remove title, i.e. first line of log
3866                 shift @$log;
3867         }
3868         # remove leading empty lines
3869         while (defined $log->[0] && $log->[0] eq "") {
3870                 shift @$log;
3871         }
3872
3873         # print log
3874         my $signoff = 0;
3875         my $empty = 0;
3876         foreach my $line (@$log) {
3877                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3878                         $signoff = 1;
3879                         $empty = 0;
3880                         if (! $opts{'-remove_signoff'}) {
3881                                 print "<div class=\"log\">\n";
3882                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3883                                 print "</div>\n";
3884                                 next;
3885                         } else {
3886                                 # remove signoff lines
3887                                 next;
3888                         }
3889                 } else {
3890                         $signoff = 0;
3891                 }
3892
3893                 # print only one empty line
3894                 # do not print empty line after signoff
3895                 if ($line eq "") {
3896                         next if ($empty || $signoff);
3897                         $empty = 1;
3898                 } else {
3899                         $empty = 0;
3900                 }
3901
3902                 print format_log_line_html($line) . "<br/>\n";
3903         }
3904         if ($opts{'-final_empty_line'}) {
3905                 # end with single empty line
3906                 print "<br/>\n" unless $empty;
3907         }
3908 }
3909
3910 # return link target (what link points to)
3911 sub git_get_link_target {
3912         my $hash = shift;
3913         my $link_target;
3914
3915         # read link
3916         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3917                 or return;
3918         {
3919                 local $/ = undef;
3920                 $link_target = <$fd>;
3921         }
3922         close $fd
3923                 or return;
3924
3925         return $link_target;
3926 }
3927
3928 # given link target, and the directory (basedir) the link is in,
3929 # return target of link relative to top directory (top tree);
3930 # return undef if it is not possible (including absolute links).
3931 sub normalize_link_target {
3932         my ($link_target, $basedir) = @_;
3933
3934         # absolute symlinks (beginning with '/') cannot be normalized
3935         return if (substr($link_target, 0, 1) eq '/');
3936
3937         # normalize link target to path from top (root) tree (dir)
3938         my $path;
3939         if ($basedir) {
3940                 $path = $basedir . '/' . $link_target;
3941         } else {
3942                 # we are in top (root) tree (dir)
3943                 $path = $link_target;
3944         }
3945
3946         # remove //, /./, and /../
3947         my @path_parts;
3948         foreach my $part (split('/', $path)) {
3949                 # discard '.' and ''
3950                 next if (!$part || $part eq '.');
3951                 # handle '..'
3952                 if ($part eq '..') {
3953                         if (@path_parts) {
3954                                 pop @path_parts;
3955                         } else {
3956                                 # link leads outside repository (outside top dir)
3957                                 return;
3958                         }
3959                 } else {
3960                         push @path_parts, $part;
3961                 }
3962         }
3963         $path = join('/', @path_parts);
3964
3965         return $path;
3966 }
3967
3968 # print tree entry (row of git_tree), but without encompassing <tr> element
3969 sub git_print_tree_entry {
3970         my ($t, $basedir, $hash_base, $have_blame) = @_;
3971
3972         my %base_key = ();
3973         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3974
3975         # The format of a table row is: mode list link.  Where mode is
3976         # the mode of the entry, list is the name of the entry, an href,
3977         # and link is the action links of the entry.
3978
3979         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3980         if (exists $t->{'size'}) {
3981                 print "<td class=\"size\">$t->{'size'}</td>\n";
3982         }
3983         if ($t->{'type'} eq "blob") {
3984                 print "<td class=\"list\">" .
3985                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3986                                                file_name=>"$basedir$t->{'name'}", %base_key),
3987                                 -class => "list"}, esc_path($t->{'name'}));
3988                 if (S_ISLNK(oct $t->{'mode'})) {
3989                         my $link_target = git_get_link_target($t->{'hash'});
3990                         if ($link_target) {
3991                                 my $norm_target = normalize_link_target($link_target, $basedir);
3992                                 if (defined $norm_target) {
3993                                         print " -> " .
3994                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3995                                                                      file_name=>$norm_target),
3996                                                        -title => $norm_target}, esc_path($link_target));
3997                                 } else {
3998                                         print " -> " . esc_path($link_target);
3999                                 }
4000                         }
4001                 }
4002                 print "</td>\n";
4003                 print "<td class=\"link\">";
4004                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4005                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4006                               "blob");
4007                 if ($have_blame) {
4008                         print " | " .
4009                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4010                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4011                                       "blame");
4012                 }
4013                 if (defined $hash_base) {
4014                         print " | " .
4015                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4016                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4017                                       "history");
4018                 }
4019                 print " | " .
4020                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4021                                                file_name=>"$basedir$t->{'name'}")},
4022                                 "raw");
4023                 print "</td>\n";
4024
4025         } elsif ($t->{'type'} eq "tree") {
4026                 print "<td class=\"list\">";
4027                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4028                                              file_name=>"$basedir$t->{'name'}",
4029                                              %base_key)},
4030                               esc_path($t->{'name'}));
4031                 print "</td>\n";
4032                 print "<td class=\"link\">";
4033                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4034                                              file_name=>"$basedir$t->{'name'}",
4035                                              %base_key)},
4036                               "tree");
4037                 if (defined $hash_base) {
4038                         print " | " .
4039                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4040                                                      file_name=>"$basedir$t->{'name'}")},
4041                                       "history");
4042                 }
4043                 print "</td>\n";
4044         } else {
4045                 # unknown object: we can only present history for it
4046                 # (this includes 'commit' object, i.e. submodule support)
4047                 print "<td class=\"list\">" .
4048                       esc_path($t->{'name'}) .
4049                       "</td>\n";
4050                 print "<td class=\"link\">";
4051                 if (defined $hash_base) {
4052                         print $cgi->a({-href => href(action=>"history",
4053                                                      hash_base=>$hash_base,
4054                                                      file_name=>"$basedir$t->{'name'}")},
4055                                       "history");
4056                 }
4057                 print "</td>\n";
4058         }
4059 }
4060
4061 ## ......................................................................
4062 ## functions printing large fragments of HTML
4063
4064 # get pre-image filenames for merge (combined) diff
4065 sub fill_from_file_info {
4066         my ($diff, @parents) = @_;
4067
4068         $diff->{'from_file'} = [ ];
4069         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4070         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4071                 if ($diff->{'status'}[$i] eq 'R' ||
4072                     $diff->{'status'}[$i] eq 'C') {
4073                         $diff->{'from_file'}[$i] =
4074                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4075                 }
4076         }
4077
4078         return $diff;
4079 }
4080
4081 # is current raw difftree line of file deletion
4082 sub is_deleted {
4083         my $diffinfo = shift;
4084
4085         return $diffinfo->{'to_id'} eq ('0' x 40);
4086 }
4087
4088 # does patch correspond to [previous] difftree raw line
4089 # $diffinfo  - hashref of parsed raw diff format
4090 # $patchinfo - hashref of parsed patch diff format
4091 #              (the same keys as in $diffinfo)
4092 sub is_patch_split {
4093         my ($diffinfo, $patchinfo) = @_;
4094
4095         return defined $diffinfo && defined $patchinfo
4096                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4097 }
4098
4099
4100 sub git_difftree_body {
4101         my ($difftree, $hash, @parents) = @_;
4102         my ($parent) = $parents[0];
4103         my $have_blame = gitweb_check_feature('blame');
4104         if ($#{$difftree} > 10) {
4105                 print "<div class=\"list_head\">\n";
4106                 print(($#{$difftree} + 1) . " files changed:\n");
4107                 print "</div>\n";
4108         }
4109
4110         print "<table class=\"" .
4111               (@parents > 1 ? "combined " : "") .
4112               "diff_tree\">\n";
4113
4114         # header only for combined diff in 'commitdiff' view
4115         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4116         if ($has_header) {
4117                 # table header
4118                 print "<thead><tr>\n" .
4119                        "<th></th><th></th>\n"; # filename, patchN link
4120                 for (my $i = 0; $i < @parents; $i++) {
4121                         my $par = $parents[$i];
4122                         print "<th>" .
4123                               $cgi->a({-href => href(action=>"commitdiff",
4124                                                      hash=>$hash, hash_parent=>$par),
4125                                        -title => 'commitdiff to parent number ' .
4126                                                   ($i+1) . ': ' . substr($par,0,7)},
4127                                       $i+1) .
4128                               "&nbsp;</th>\n";
4129                 }
4130                 print "</tr></thead>\n<tbody>\n";
4131         }
4132
4133         my $alternate = 1;
4134         my $patchno = 0;
4135         foreach my $line (@{$difftree}) {
4136                 my $diff = parsed_difftree_line($line);
4137
4138                 if ($alternate) {
4139                         print "<tr class=\"dark\">\n";
4140                 } else {
4141                         print "<tr class=\"light\">\n";
4142                 }
4143                 $alternate ^= 1;
4144
4145                 if (exists $diff->{'nparents'}) { # combined diff
4146
4147                         fill_from_file_info($diff, @parents)
4148                                 unless exists $diff->{'from_file'};
4149
4150                         if (!is_deleted($diff)) {
4151                                 # file exists in the result (child) commit
4152                                 print "<td>" .
4153                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4154                                                              file_name=>$diff->{'to_file'},
4155                                                              hash_base=>$hash),
4156                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4157                                       "</td>\n";
4158                         } else {
4159                                 print "<td>" .
4160                                       esc_path($diff->{'to_file'}) .
4161                                       "</td>\n";
4162                         }
4163
4164                         if ($action eq 'commitdiff') {
4165                                 # link to patch
4166                                 $patchno++;
4167                                 print "<td class=\"link\">" .
4168                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
4169                                       " | " .
4170                                       "</td>\n";
4171                         }
4172
4173                         my $has_history = 0;
4174                         my $not_deleted = 0;
4175                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4176                                 my $hash_parent = $parents[$i];
4177                                 my $from_hash = $diff->{'from_id'}[$i];
4178                                 my $from_path = $diff->{'from_file'}[$i];
4179                                 my $status = $diff->{'status'}[$i];
4180
4181                                 $has_history ||= ($status ne 'A');
4182                                 $not_deleted ||= ($status ne 'D');
4183
4184                                 if ($status eq 'A') {
4185                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4186                                 } elsif ($status eq 'D') {
4187                                         print "<td class=\"link\">" .
4188                                               $cgi->a({-href => href(action=>"blob",
4189                                                                      hash_base=>$hash,
4190                                                                      hash=>$from_hash,
4191                                                                      file_name=>$from_path)},
4192                                                       "blob" . ($i+1)) .
4193                                               " | </td>\n";
4194                                 } else {
4195                                         if ($diff->{'to_id'} eq $from_hash) {
4196                                                 print "<td class=\"link nochange\">";
4197                                         } else {
4198                                                 print "<td class=\"link\">";
4199                                         }
4200                                         print $cgi->a({-href => href(action=>"blobdiff",
4201                                                                      hash=>$diff->{'to_id'},
4202                                                                      hash_parent=>$from_hash,
4203                                                                      hash_base=>$hash,
4204                                                                      hash_parent_base=>$hash_parent,
4205                                                                      file_name=>$diff->{'to_file'},
4206                                                                      file_parent=>$from_path)},
4207                                                       "diff" . ($i+1)) .
4208                                               " | </td>\n";
4209                                 }
4210                         }
4211
4212                         print "<td class=\"link\">";
4213                         if ($not_deleted) {
4214                                 print $cgi->a({-href => href(action=>"blob",
4215                                                              hash=>$diff->{'to_id'},
4216                                                              file_name=>$diff->{'to_file'},
4217                                                              hash_base=>$hash)},
4218                                               "blob");
4219                                 print " | " if ($has_history);
4220                         }
4221                         if ($has_history) {
4222                                 print $cgi->a({-href => href(action=>"history",
4223                                                              file_name=>$diff->{'to_file'},
4224                                                              hash_base=>$hash)},
4225                                               "history");
4226                         }
4227                         print "</td>\n";
4228
4229                         print "</tr>\n";
4230                         next; # instead of 'else' clause, to avoid extra indent
4231                 }
4232                 # else ordinary diff
4233
4234                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4235                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4236                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4237                         $to_mode_oct = oct $diff->{'to_mode'};
4238                         if (S_ISREG($to_mode_oct)) { # only for regular file
4239                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4240                         }
4241                         $to_file_type = file_type($diff->{'to_mode'});
4242                 }
4243                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4244                         $from_mode_oct = oct $diff->{'from_mode'};
4245                         if (S_ISREG($to_mode_oct)) { # only for regular file
4246                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4247                         }
4248                         $from_file_type = file_type($diff->{'from_mode'});
4249                 }
4250
4251                 if ($diff->{'status'} eq "A") { # created
4252                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4253                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4254                         $mode_chng   .= "]</span>";
4255                         print "<td>";
4256                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4257                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4258                                       -class => "list"}, esc_path($diff->{'file'}));
4259                         print "</td>\n";
4260                         print "<td>$mode_chng</td>\n";
4261                         print "<td class=\"link\">";
4262                         if ($action eq 'commitdiff') {
4263                                 # link to patch
4264                                 $patchno++;
4265                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4266                                 print " | ";
4267                         }
4268                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4269                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4270                                       "blob");
4271                         print "</td>\n";
4272
4273                 } elsif ($diff->{'status'} eq "D") { # deleted
4274                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4275                         print "<td>";
4276                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4277                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4278                                        -class => "list"}, esc_path($diff->{'file'}));
4279                         print "</td>\n";
4280                         print "<td>$mode_chng</td>\n";
4281                         print "<td class=\"link\">";
4282                         if ($action eq 'commitdiff') {
4283                                 # link to patch
4284                                 $patchno++;
4285                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4286                                 print " | ";
4287                         }
4288                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4289                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4290                                       "blob") . " | ";
4291                         if ($have_blame) {
4292                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4293                                                              file_name=>$diff->{'file'})},
4294                                               "blame") . " | ";
4295                         }
4296                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4297                                                      file_name=>$diff->{'file'})},
4298                                       "history");
4299                         print "</td>\n";
4300
4301                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4302                         my $mode_chnge = "";
4303                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4304                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4305                                 if ($from_file_type ne $to_file_type) {
4306                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4307                                 }
4308                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4309                                         if ($from_mode_str && $to_mode_str) {
4310                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4311                                         } elsif ($to_mode_str) {
4312                                                 $mode_chnge .= " mode: $to_mode_str";
4313                                         }
4314                                 }
4315                                 $mode_chnge .= "]</span>\n";
4316                         }
4317                         print "<td>";
4318                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4319                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4320                                       -class => "list"}, esc_path($diff->{'file'}));
4321                         print "</td>\n";
4322                         print "<td>$mode_chnge</td>\n";
4323                         print "<td class=\"link\">";
4324                         if ($action eq 'commitdiff') {
4325                                 # link to patch
4326                                 $patchno++;
4327                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4328                                       " | ";
4329                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4330                                 # "commit" view and modified file (not onlu mode changed)
4331                                 print $cgi->a({-href => href(action=>"blobdiff",
4332                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4333                                                              hash_base=>$hash, hash_parent_base=>$parent,
4334                                                              file_name=>$diff->{'file'})},
4335                                               "diff") .
4336                                       " | ";
4337                         }
4338                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4339                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4340                                        "blob") . " | ";
4341                         if ($have_blame) {
4342                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4343                                                              file_name=>$diff->{'file'})},
4344                                               "blame") . " | ";
4345                         }
4346                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4347                                                      file_name=>$diff->{'file'})},
4348                                       "history");
4349                         print "</td>\n";
4350
4351                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4352                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4353                         my $nstatus = $status_name{$diff->{'status'}};
4354                         my $mode_chng = "";
4355                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4356                                 # mode also for directories, so we cannot use $to_mode_str
4357                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4358                         }
4359                         print "<td>" .
4360                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4361                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4362                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4363                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4364                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4365                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4366                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4367                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4368                               "<td class=\"link\">";
4369                         if ($action eq 'commitdiff') {
4370                                 # link to patch
4371                                 $patchno++;
4372                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4373                                       " | ";
4374                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4375                                 # "commit" view and modified file (not only pure rename or copy)
4376                                 print $cgi->a({-href => href(action=>"blobdiff",
4377                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4378                                                              hash_base=>$hash, hash_parent_base=>$parent,
4379                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4380                                               "diff") .
4381                                       " | ";
4382                         }
4383                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4384                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4385                                       "blob") . " | ";
4386                         if ($have_blame) {
4387                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4388                                                              file_name=>$diff->{'to_file'})},
4389                                               "blame") . " | ";
4390                         }
4391                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4392                                                     file_name=>$diff->{'to_file'})},
4393                                       "history");
4394                         print "</td>\n";
4395
4396                 } # we should not encounter Unmerged (U) or Unknown (X) status
4397                 print "</tr>\n";
4398         }
4399         print "</tbody>" if $has_header;
4400         print "</table>\n";
4401 }
4402
4403 sub git_patchset_body {
4404         my ($fd, $difftree, $hash, @hash_parents) = @_;
4405         my ($hash_parent) = $hash_parents[0];
4406
4407         my $is_combined = (@hash_parents > 1);
4408         my $patch_idx = 0;
4409         my $patch_number = 0;
4410         my $patch_line;
4411         my $diffinfo;
4412         my $to_name;
4413         my (%from, %to);
4414
4415         print "<div class=\"patchset\">\n";
4416
4417         # skip to first patch
4418         while ($patch_line = <$fd>) {
4419                 chomp $patch_line;
4420
4421                 last if ($patch_line =~ m/^diff /);
4422         }
4423
4424  PATCH:
4425         while ($patch_line) {
4426
4427                 # parse "git diff" header line
4428                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4429                         # $1 is from_name, which we do not use
4430                         $to_name = unquote($2);
4431                         $to_name =~ s!^b/!!;
4432                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4433                         # $1 is 'cc' or 'combined', which we do not use
4434                         $to_name = unquote($2);
4435                 } else {
4436                         $to_name = undef;
4437                 }
4438
4439                 # check if current patch belong to current raw line
4440                 # and parse raw git-diff line if needed
4441                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4442                         # this is continuation of a split patch
4443                         print "<div class=\"patch cont\">\n";
4444                 } else {
4445                         # advance raw git-diff output if needed
4446                         $patch_idx++ if defined $diffinfo;
4447
4448                         # read and prepare patch information
4449                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4450
4451                         # compact combined diff output can have some patches skipped
4452                         # find which patch (using pathname of result) we are at now;
4453                         if ($is_combined) {
4454                                 while ($to_name ne $diffinfo->{'to_file'}) {
4455                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4456                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4457                                               "</div>\n";  # class="patch"
4458
4459                                         $patch_idx++;
4460                                         $patch_number++;
4461
4462                                         last if $patch_idx > $#$difftree;
4463                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4464                                 }
4465                         }
4466
4467                         # modifies %from, %to hashes
4468                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4469
4470                         # this is first patch for raw difftree line with $patch_idx index
4471                         # we index @$difftree array from 0, but number patches from 1
4472                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4473                 }
4474
4475                 # git diff header
4476                 #assert($patch_line =~ m/^diff /) if DEBUG;
4477                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4478                 $patch_number++;
4479                 # print "git diff" header
4480                 print format_git_diff_header_line($patch_line, $diffinfo,
4481                                                   \%from, \%to);
4482
4483                 # print extended diff header
4484                 print "<div class=\"diff extended_header\">\n";
4485         EXTENDED_HEADER:
4486                 while ($patch_line = <$fd>) {
4487                         chomp $patch_line;
4488
4489                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4490
4491                         print format_extended_diff_header_line($patch_line, $diffinfo,
4492                                                                \%from, \%to);
4493                 }
4494                 print "</div>\n"; # class="diff extended_header"
4495
4496                 # from-file/to-file diff header
4497                 if (! $patch_line) {
4498                         print "</div>\n"; # class="patch"
4499                         last PATCH;
4500                 }
4501                 next PATCH if ($patch_line =~ m/^diff /);
4502                 #assert($patch_line =~ m/^---/) if DEBUG;
4503
4504                 my $last_patch_line = $patch_line;
4505                 $patch_line = <$fd>;
4506                 chomp $patch_line;
4507                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4508
4509                 print format_diff_from_to_header($last_patch_line, $patch_line,
4510                                                  $diffinfo, \%from, \%to,
4511                                                  @hash_parents);
4512
4513                 # the patch itself
4514         LINE:
4515                 while ($patch_line = <$fd>) {
4516                         chomp $patch_line;
4517
4518                         next PATCH if ($patch_line =~ m/^diff /);
4519
4520                         print format_diff_line($patch_line, \%from, \%to);
4521                 }
4522
4523         } continue {
4524                 print "</div>\n"; # class="patch"
4525         }
4526
4527         # for compact combined (--cc) format, with chunk and patch simplification
4528         # the patchset might be empty, but there might be unprocessed raw lines
4529         for (++$patch_idx if $patch_number > 0;
4530              $patch_idx < @$difftree;
4531              ++$patch_idx) {
4532                 # read and prepare patch information
4533                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4534
4535                 # generate anchor for "patch" links in difftree / whatchanged part
4536                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4537                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4538                       "</div>\n";  # class="patch"
4539
4540                 $patch_number++;
4541         }
4542
4543         if ($patch_number == 0) {
4544                 if (@hash_parents > 1) {
4545                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4546                 } else {
4547                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4548                 }
4549         }
4550
4551         print "</div>\n"; # class="patchset"
4552 }
4553
4554 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4555
4556 # fills project list info (age, description, owner, forks) for each
4557 # project in the list, removing invalid projects from returned list
4558 # NOTE: modifies $projlist, but does not remove entries from it
4559 sub fill_project_list_info {
4560         my ($projlist, $check_forks) = @_;
4561         my @projects;
4562
4563         my $show_ctags = gitweb_check_feature('ctags');
4564  PROJECT:
4565         foreach my $pr (@$projlist) {
4566                 my (@activity) = git_get_last_activity($pr->{'path'});
4567                 unless (@activity) {
4568                         next PROJECT;
4569                 }
4570                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4571                 if (!defined $pr->{'descr'}) {
4572                         my $descr = git_get_project_description($pr->{'path'}) || "";
4573                         $descr = to_utf8($descr);
4574                         $pr->{'descr_long'} = $descr;
4575                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4576                 }
4577                 if (!defined $pr->{'owner'}) {
4578                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4579                 }
4580                 if ($check_forks) {
4581                         my $pname = $pr->{'path'};
4582                         if (($pname =~ s/\.git$//) &&
4583                             ($pname !~ /\/$/) &&
4584                             (-d "$projectroot/$pname")) {
4585                                 $pr->{'forks'} = "-d $projectroot/$pname";
4586                         } else {
4587                                 $pr->{'forks'} = 0;
4588                         }
4589                 }
4590                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4591                 push @projects, $pr;
4592         }
4593
4594         return @projects;
4595 }
4596
4597 # print 'sort by' <th> element, generating 'sort by $name' replay link
4598 # if that order is not selected
4599 sub print_sort_th {
4600         print format_sort_th(@_);
4601 }
4602
4603 sub format_sort_th {
4604         my ($name, $order, $header) = @_;
4605         my $sort_th = "";
4606         $header ||= ucfirst($name);
4607
4608         if ($order eq $name) {
4609                 $sort_th .= "<th>$header</th>\n";
4610         } else {
4611                 $sort_th .= "<th>" .
4612                             $cgi->a({-href => href(-replay=>1, order=>$name),
4613                                      -class => "header"}, $header) .
4614                             "</th>\n";
4615         }
4616
4617         return $sort_th;
4618 }
4619
4620 sub git_project_list_body {
4621         # actually uses global variable $project
4622         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4623
4624         my $check_forks = gitweb_check_feature('forks');
4625         my @projects = fill_project_list_info($projlist, $check_forks);
4626         my $count;
4627         $order ||= $default_projects_order;
4628         $from = 0 unless defined $from;
4629         $to = $#projects if (!defined $to || $#projects < $to);
4630
4631         my %order_info = (
4632                 project => { key => 'path', type => 'str' },
4633                 descr => { key => 'descr_long', type => 'str' },
4634                 owner => { key => 'owner', type => 'str' },
4635                 age => { key => 'age', type => 'num' }
4636         );
4637         my $oi = $order_info{$order};
4638         if ($oi->{'type'} eq 'str') {
4639                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4640         } else {
4641                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4642         }
4643
4644         my $show_ctags = gitweb_check_feature('ctags');
4645         if ($show_ctags) {
4646                 my %ctags;
4647                 foreach my $p (@projects) {
4648                         foreach my $ct (keys %{$p->{'ctags'}}) {
4649                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4650                         }
4651                 }
4652                 my $cloud = git_populate_project_tagcloud(\%ctags);
4653                 print git_show_project_tagcloud($cloud, 64);
4654         }
4655
4656         print "<table class=\"project_list\">\n";
4657         unless ($no_header) {
4658                 print "<tr>\n";
4659                 if ($check_forks) {
4660                         print "<th></th>\n";
4661                 }
4662                 print_sort_th('project', $order, 'Project');
4663                 print_sort_th('descr', $order, 'Description');
4664                 print_sort_th('owner', $order, 'Owner');
4665                 print_sort_th('age', $order, 'Last Change');
4666                 print "<th></th>\n" . # for links
4667                       "</tr>\n";
4668         }
4669         my $alternate = 1;
4670         my $tagfilter = $cgi->param('by_tag');
4671         for (my $i = $from; $i <= $to; $i++) {
4672                 $count++;
4673                 my $pr = $projects[$i];
4674
4675                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4676                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4677                         and not $pr->{'descr_long'} =~ /$searchtext/;
4678                 # Weed out forks or non-matching entries of search
4679                 if ($check_forks) {
4680                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4681                         $forkbase="^$forkbase" if $forkbase;
4682                         next if not $searchtext and not $tagfilter and $show_ctags
4683                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4684                 }
4685
4686                 if ($alternate) {
4687                         print "<tr class=\"dark\">\n";
4688                 } else {
4689                         print "<tr class=\"light\">\n";
4690                 }
4691                 $alternate ^= 1;
4692                 if ($check_forks) {
4693                         print "<td>";
4694                         if ($pr->{'forks'}) {
4695                                 print "<!-- $pr->{'forks'} -->\n";
4696                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4697                         }
4698                         print "</td>\n";
4699                 }
4700                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4701                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4702                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4703                                         -class => "list", -title => $pr->{'descr_long'}},
4704                                         esc_html($pr->{'descr'})) . "</td>\n" .
4705                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4706                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4707                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4708                       "<td class=\"link\">" .
4709                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4710                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4711                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4712                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4713                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4714                       "</td>\n" .
4715                       "</tr>\n";
4716         }
4717         print "<tr><td>&nbsp;</td><td>&nbsp;</td><td>&nbsp;</td><td>".$count." projects found</td><td>&nbsp;</td><td>&nbsp;</td></tr>";
4718         if (defined $extra) {
4719                 print "<tr>\n";
4720                 if ($check_forks) {
4721                         print "<td></td>\n";
4722                 }
4723                 print "<td colspan=\"5\">$extra</td>\n" .
4724                       "</tr>\n";
4725         }
4726         print "</table>\n";
4727 }
4728
4729 sub git_log_body {
4730         # uses global variable $project
4731         my ($commitlist, $from, $to, $refs, $extra) = @_;
4732
4733         $from = 0 unless defined $from;
4734         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4735
4736         for (my $i = 0; $i <= $to; $i++) {
4737                 my %co = %{$commitlist->[$i]};
4738                 next if !%co;
4739                 my $commit = $co{'id'};
4740                 my $ref = format_ref_marker($refs, $commit);
4741                 my %ad = parse_date($co{'author_epoch'});
4742                 git_print_header_div('commit',
4743                                "<span class=\"age\">$co{'age_string'}</span>" .
4744                                esc_html($co{'title'}) . $ref,
4745                                $commit);
4746                 print "<div class=\"title_text\">\n" .
4747                       "<div class=\"log_link\">\n" .
4748                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4749                       " | " .
4750                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4751                       " | " .
4752                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4753                       "<br/>\n" .
4754                       "</div>\n";
4755                       git_print_authorship(\%co, -tag => 'span');
4756                       print "<br/>\n</div>\n";
4757
4758                 print "<div class=\"log_body\">\n";
4759                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4760                 print "</div>\n";
4761         }
4762         if ($extra) {
4763                 print "<div class=\"page_nav\">\n";
4764                 print "$extra\n";
4765                 print "</div>\n";
4766         }
4767 }
4768
4769 sub git_shortlog_body {
4770         # uses global variable $project
4771         my ($commitlist, $from, $to, $refs, $extra, $file_name, $file_hash, $ftype, $allrefs) = @_;
4772
4773         $from = 0 unless defined $from;
4774         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4775
4776         print "<table class=\"shortlog\" cellspacing=\"0\" cellpadding=\"0\">\n";
4777         my $alternate = 1;
4778
4779         my $graph_rand = int(rand(99999));
4780         my $head = git_get_head_hash($project);
4781         my $graph_hash;
4782         if (defined $allrefs && $allrefs == 1) {
4783                 $graph_hash = "all";
4784         }
4785         if (!defined $hash) {
4786                 $hash = $head;
4787         }
4788         if(!defined $graph_hash) {
4789                 $graph_hash = $hash;
4790         }
4791         if (!defined $page) {
4792                 $page = 0;
4793         }
4794
4795         print "<tr class=\"header\">\n";
4796         print "<td colspan=\"2\"><img class=\"graph\" src=\"git_graph.php?r=".$graph_rand.";p=".$project.";h=".$graph_hash.";from=".($from + (100 * $page)).";to=".($to + (100 * $page)).";c=header\" /></td>\n";
4797         print "<td valign=\"bottom\"><b>Author</b></td>\n";
4798         print "<td valign=\"bottom\"><b>Commit</b></td>\n";
4799         print "<td></td>\n";
4800         print "</tr>\n";
4801         for (my $i = $from; $i <= $to; $i++) {
4802                 my %co = %{$commitlist->[$i]};
4803                 my $commit = $co{'id'};
4804                 my $ref = format_ref_marker($refs, $commit);
4805                 if ($alternate) {
4806                         print "<tr class=\"dark\">\n";
4807                 } else {
4808                         print "<tr class=\"light\">\n";
4809                 }
4810                 $alternate ^= 1;
4811
4812                 print "<td><img class=\"graph\" src=\"git_graph.php?r=".$graph_rand.";p=".$project.";h=".$graph_hash.";from=".($from + (100 * $page)).";to=".($to + (100 * $page)).";c=".$commit."\" /></td>";
4813                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4814                 print "<td class=\"". age_class($co{'age'}) . "\" title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4815                       format_author_html('td', \%co, 10) . "<td>";
4816                 print format_subject_html($co{'title'}, $co{'title_short'},
4817                                           href(action=>"commit", hash=>$commit), $ref);
4818                 print "</td>\n" .
4819                       "<td class=\"link\">" .
4820                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4821                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4822                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4823                 my $snapshot_links = format_snapshot_links($commit);
4824                 if (defined $snapshot_links) {
4825                         print " | " . $snapshot_links;
4826                 }
4827                 print "</td>\n" .
4828                       "</tr>\n";
4829         }
4830         if (defined $extra) {
4831                 print "<tr>\n" .
4832                       "<td colspan=\"5\">$extra</td>\n" .
4833                       "</tr>\n";
4834         }
4835         print "</table>\n";
4836 }
4837
4838 sub git_history_body {
4839         # Warning: assumes constant type (blob or tree) during history
4840         my ($commitlist, $from, $to, $refs, $extra,
4841             $file_name, $file_hash, $ftype) = @_;
4842
4843         $from = 0 unless defined $from;
4844         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4845
4846         print "<table class=\"history\">\n";
4847         my $alternate = 1;
4848         for (my $i = $from; $i <= $to; $i++) {
4849                 my %co = %{$commitlist->[$i]};
4850                 if (!%co) {
4851                         next;
4852                 }
4853                 my $commit = $co{'id'};
4854
4855                 my $ref = format_ref_marker($refs, $commit);
4856
4857                 if ($alternate) {
4858                         print "<tr class=\"dark\">\n";
4859                 } else {
4860                         print "<tr class=\"light\">\n";
4861                 }
4862                 $alternate ^= 1;
4863                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4864         # shortlog:   format_author_html('td', \%co, 10)
4865                       format_author_html('td', \%co, 15, 3) . "<td>";
4866                 # originally git_history used chop_str($co{'title'}, 50)
4867                 print format_subject_html($co{'title'}, $co{'title_short'},
4868                                           href(action=>"commit", hash=>$commit), $ref);
4869                 print "</td>\n" .
4870                       "<td class=\"link\">" .
4871                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4872                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4873
4874                 if ($ftype eq 'blob') {
4875                         my $blob_current = $file_hash;
4876                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4877                         if (defined $blob_current && defined $blob_parent &&
4878                                         $blob_current ne $blob_parent) {
4879                                 print " | " .
4880                                         $cgi->a({-href => href(action=>"blobdiff",
4881                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4882                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4883                                                                file_name=>$file_name)},
4884                                                 "diff to current");
4885                         }
4886                 }
4887                 print "</td>\n" .
4888                       "</tr>\n";
4889         }
4890         if (defined $extra) {
4891                 print "<tr>\n" .
4892                       "<td colspan=\"4\">$extra</td>\n" .
4893                       "</tr>\n";
4894         }
4895         print "</table>\n";
4896 }
4897
4898 sub git_tags_body {
4899         # uses global variable $project
4900         my ($taglist, $from, $to, $extra) = @_;
4901         $from = 0 unless defined $from;
4902         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4903
4904         print "<table class=\"tags\">\n";
4905         my $alternate = 1;
4906         for (my $i = $from; $i <= $to; $i++) {
4907                 my $entry = $taglist->[$i];
4908                 my %tag = %$entry;
4909                 my $comment = $tag{'subject'};
4910                 my $comment_short;
4911                 if (defined $comment) {
4912                         $comment_short = chop_str($comment, 30, 5);
4913                 }
4914                 if ($alternate) {
4915                         print "<tr class=\"dark\">\n";
4916                 } else {
4917                         print "<tr class=\"light\">\n";
4918                 }
4919                 $alternate ^= 1;
4920                 if (defined $tag{'age'}) {
4921                         print "<td><i>$tag{'age'}</i></td>\n";
4922                 } else {
4923                         print "<td></td>\n";
4924                 }
4925                 print "<td>" .
4926                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4927                                -class => "list name"}, esc_html($tag{'name'})) .
4928                       "</td>\n" .
4929                       "<td>";
4930                 if (defined $comment) {
4931                         print format_subject_html($comment, $comment_short,
4932                                                   href(action=>"tag", hash=>$tag{'id'}));
4933                 }
4934                 print "</td>\n" .
4935                       "<td class=\"selflink\">";
4936                 if ($tag{'type'} eq "tag") {
4937                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4938                 } else {
4939                         print "&nbsp;";
4940                 }
4941                 print "</td>\n" .
4942                       "<td class=\"link\">" . " | " .
4943                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4944                 if ($tag{'reftype'} eq "commit") {
4945                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4946                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4947                 } elsif ($tag{'reftype'} eq "blob") {
4948                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4949                 }
4950                 print "</td>\n" .
4951                       "</tr>";
4952         }
4953         if (defined $extra) {
4954                 print "<tr>\n" .
4955                       "<td colspan=\"5\">$extra</td>\n" .
4956                       "</tr>\n";
4957         }
4958         print "</table>\n";
4959 }
4960
4961 sub git_heads_body {
4962         # uses global variable $project
4963         my ($headlist, $head, $from, $to, $extra) = @_;
4964         $from = 0 unless defined $from;
4965         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4966
4967         print "<table class=\"heads\">\n";
4968         my $alternate = 1;
4969         for (my $i = $from; $i <= $to; $i++) {
4970                 my $entry = $headlist->[$i];
4971                 my %ref = %$entry;
4972                 my $curr = $ref{'id'} eq $head;
4973                 if ($alternate) {
4974                         print "<tr class=\"dark\">\n";
4975                 } else {
4976                         print "<tr class=\"light\">\n";
4977                 }
4978                 $alternate ^= 1;
4979                 print "<td><i>$ref{'age'}</i></td>\n" .
4980                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4981                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4982                                -class => "list name"},esc_html($ref{'name'})) .
4983                       "</td>\n" .
4984                       "<td class=\"link\">" .
4985                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4986                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4987                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4988                       "</td>\n" .
4989                       "</tr>";
4990         }
4991         if (defined $extra) {
4992                 print "<tr>\n" .
4993                       "<td colspan=\"3\">$extra</td>\n" .
4994                       "</tr>\n";
4995         }
4996         print "</table>\n";
4997 }
4998
4999 sub git_search_grep_body {
5000         my ($commitlist, $from, $to, $extra) = @_;
5001         $from = 0 unless defined $from;
5002         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
5003
5004         print "<table class=\"commit_search\">\n";
5005         my $alternate = 1;
5006         for (my $i = $from; $i <= $to; $i++) {
5007                 my %co = %{$commitlist->[$i]};
5008                 if (!%co) {
5009                         next;
5010                 }
5011                 my $commit = $co{'id'};
5012                 if ($alternate) {
5013                         print "<tr class=\"dark\">\n";
5014                 } else {
5015                         print "<tr class=\"light\">\n";
5016                 }
5017                 $alternate ^= 1;
5018                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5019                       format_author_html('td', \%co, 15, 5) .
5020                       "<td>" .
5021                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5022                                -class => "list subject"},
5023                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5024                 my $comment = $co{'comment'};
5025                 foreach my $line (@$comment) {
5026                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
5027                                 my ($lead, $match, $trail) = ($1, $2, $3);
5028                                 $match = chop_str($match, 70, 5, 'center');
5029                                 my $contextlen = int((80 - length($match))/2);
5030                                 $contextlen = 30 if ($contextlen > 30);
5031                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5032                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5033
5034                                 $lead  = esc_html($lead);
5035                                 $match = esc_html($match);
5036                                 $trail = esc_html($trail);
5037
5038                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5039                         }
5040                 }
5041                 print "</td>\n" .
5042                       "<td class=\"link\">" .
5043                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5044                       " | " .
5045                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5046                       " | " .
5047                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5048                 print "</td>\n" .
5049                       "</tr>\n";
5050         }
5051         if (defined $extra) {
5052                 print "<tr>\n" .
5053                       "<td colspan=\"3\">$extra</td>\n" .
5054                       "</tr>\n";
5055         }
5056         print "</table>\n";
5057 }
5058
5059 ## ======================================================================
5060 ## ======================================================================
5061 ## actions
5062
5063 sub git_project_list {
5064         my $order = $input_params{'order'};
5065         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5066                 die_error(400, "Unknown order parameter");
5067         }
5068
5069         my @list = git_get_projects_list();
5070         if (!@list) {
5071                 die_error(404, "No projects found");
5072         }
5073
5074         git_header_html();
5075         if (defined $home_text && -f $home_text) {
5076                 print "<div class=\"index_include\">\n";
5077                 insert_file($home_text);
5078                 print "</div>\n";
5079         }
5080         print $cgi->startform(-method => "get") .
5081               "<p class=\"projsearch\">Search:\n" .
5082               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5083               "</p>" .
5084               $cgi->end_form() . "\n";
5085         git_project_list_body(\@list, $order);
5086         git_footer_html();
5087 }
5088
5089 sub git_forks {
5090         my $order = $input_params{'order'};
5091         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5092                 die_error(400, "Unknown order parameter");
5093         }
5094
5095         my @list = git_get_projects_list($project);
5096         if (!@list) {
5097                 die_error(404, "No forks found");
5098         }
5099
5100         git_header_html();
5101         git_print_page_nav('','');
5102         git_print_header_div('summary', "$project forks");
5103         git_project_list_body(\@list, $order);
5104         git_footer_html();
5105 }
5106
5107 sub git_project_index {
5108         my @projects = git_get_projects_list($project);
5109
5110         print $cgi->header(
5111                 -type => 'text/plain',
5112                 -charset => 'utf-8',
5113                 -content_disposition => 'inline; filename="index.aux"');
5114
5115         foreach my $pr (@projects) {
5116                 if (!exists $pr->{'owner'}) {
5117                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5118                 }
5119
5120                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5121                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5122                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5123                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5124                 $path  =~ s/ /\+/g;
5125                 $owner =~ s/ /\+/g;
5126
5127                 print "$path $owner\n";
5128         }
5129 }
5130
5131 sub git_summary {
5132         my $descr = git_get_project_description($project) || "none";
5133         my %co = parse_commit("HEAD");
5134         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5135         my $head = $co{'id'};
5136
5137         my $owner = git_get_project_owner($project);
5138
5139         my $refs = git_get_references();
5140         # These get_*_list functions return one more to allow us to see if
5141         # there are more ...
5142         my @taglist  = git_get_tags_list(16);
5143         my @headlist = git_get_heads_list(16);
5144         my @forklist;
5145         my $check_forks = gitweb_check_feature('forks');
5146
5147         if ($check_forks) {
5148                 @forklist = git_get_projects_list($project);
5149         }
5150
5151         git_header_html();
5152         git_print_page_nav('summary','', $head);
5153
5154         print "<div class=\"title\">&nbsp;</div>\n";
5155         print "<table class=\"projects_list\">\n" .
5156               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5157               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5158         if (defined $cd{'rfc2822'}) {
5159                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5160         }
5161
5162         # use per project git URL list in $projectroot/$project/cloneurl
5163         # or make project git URL from git base URL and project name
5164         my $url_tag = "URL";
5165         my @url_list = git_get_project_url_list($project);
5166         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5167         foreach my $git_url (@url_list) {
5168                 next unless $git_url;
5169                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
5170                 $url_tag = "";
5171         }
5172
5173         # Tag cloud
5174         my $show_ctags = gitweb_check_feature('ctags');
5175         if ($show_ctags) {
5176                 my $ctags = git_get_project_ctags($project);
5177                 my $cloud = git_populate_project_tagcloud($ctags);
5178                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5179                 print "</td>\n<td>" unless %$ctags;
5180                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
5181                 print "</td>\n<td>" if %$ctags;
5182                 print git_show_project_tagcloud($cloud, 48);
5183                 print "</td></tr>";
5184         }
5185
5186         print "</table>\n";
5187
5188         # If XSS prevention is on, we don't include README.html.
5189         # TODO: Allow a readme in some safe format.
5190         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5191                 print "<div class=\"title\">readme</div>\n" .
5192                       "<div class=\"readme\">\n";
5193                 insert_file("$projectroot/$project/README.html");
5194                 print "\n</div>\n"; # class="readme"
5195         }
5196
5197         # we need to request one more than 16 (0..15) to check if
5198         # those 16 are all
5199         my @commitlist = $head ? parse_commits("--all", 17) : ();
5200         if (@commitlist) {
5201                 git_print_header_div('shortlog');
5202                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5203                                   $#commitlist <=  15 ? undef :
5204                                   $cgi->a({-href => href(action=>"shortlog")}, "..."), 0, 0, 0, 1);
5205         }
5206
5207         if (@taglist) {
5208                 git_print_header_div('tags');
5209                 git_tags_body(\@taglist, 0, 15,
5210                               $#taglist <=  15 ? undef :
5211                               $cgi->a({-href => href(action=>"tags")}, "..."));
5212         }
5213
5214         if (@headlist) {
5215                 git_print_header_div('heads');
5216                 git_heads_body(\@headlist, $head, 0, 15,
5217                                $#headlist <= 15 ? undef :
5218                                $cgi->a({-href => href(action=>"heads")}, "..."));
5219         }
5220
5221         if (@forklist) {
5222                 git_print_header_div('forks');
5223                 git_project_list_body(\@forklist, 'age', 0, 15,
5224                                       $#forklist <= 15 ? undef :
5225                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5226                                       'no_header');
5227         }
5228
5229         git_footer_html();
5230 }
5231
5232 sub git_tag {
5233         my $head = git_get_head_hash($project);
5234         git_header_html();
5235         git_print_page_nav('','', $head,undef,$head);
5236         my %tag = parse_tag($hash);
5237
5238         if (! %tag) {
5239                 die_error(404, "Unknown tag object");
5240         }
5241
5242         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5243         print "<div class=\"title_text\">\n" .
5244               "<table class=\"object_header\">\n" .
5245               "<tr>\n" .
5246               "<td>object</td>\n" .
5247               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5248                                $tag{'object'}) . "</td>\n" .
5249               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5250                                               $tag{'type'}) . "</td>\n" .
5251               "</tr>\n";
5252         if (defined($tag{'author'})) {
5253                 git_print_authorship_rows(\%tag, 'author');
5254         }
5255         print "</table>\n\n" .
5256               "</div>\n";
5257         print "<div class=\"page_body\">";
5258         my $comment = $tag{'comment'};
5259         foreach my $line (@$comment) {
5260                 chomp $line;
5261                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5262         }
5263         print "</div>\n";
5264         git_footer_html();
5265 }
5266
5267 sub git_blame_common {
5268         my $format = shift || 'porcelain';
5269         if ($format eq 'porcelain' && $cgi->param('js')) {
5270                 $format = 'incremental';
5271                 $action = 'blame_incremental'; # for page title etc
5272         }
5273
5274         # permissions
5275         gitweb_check_feature('blame')
5276                 or die_error(403, "Blame view not allowed");
5277
5278         # error checking
5279         die_error(400, "No file name given") unless $file_name;
5280         $hash_base ||= git_get_head_hash($project);
5281         die_error(404, "Couldn't find base commit") unless $hash_base;
5282         my %co = parse_commit($hash_base)
5283                 or die_error(404, "Commit not found");
5284         my $ftype = "blob";
5285         if (!defined $hash) {
5286                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5287                         or die_error(404, "Error looking up file");
5288         } else {
5289                 $ftype = git_get_type($hash);
5290                 if ($ftype !~ "blob") {
5291                         die_error(400, "Object is not a blob");
5292                 }
5293         }
5294
5295         my $fd;
5296         if ($format eq 'incremental') {
5297                 # get file contents (as base)
5298                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5299                         or die_error(500, "Open git-cat-file failed");
5300         } elsif ($format eq 'data') {
5301                 # run git-blame --incremental
5302                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5303                         $hash_base, "--", $file_name
5304                         or die_error(500, "Open git-blame --incremental failed");
5305         } else {
5306                 # run git-blame --porcelain
5307                 open $fd, "-|", git_cmd(), "blame", '-p',
5308                         $hash_base, '--', $file_name
5309                         or die_error(500, "Open git-blame --porcelain failed");
5310         }
5311
5312         # incremental blame data returns early
5313         if ($format eq 'data') {
5314                 print $cgi->header(
5315                         -type=>"text/plain", -charset => "utf-8",
5316                         -status=> "200 OK");
5317                 local $| = 1; # output autoflush
5318                 print while <$fd>;
5319                 close $fd
5320                         or print "ERROR $!\n";
5321
5322                 print 'END';
5323                 if (defined $t0 && gitweb_check_feature('timed')) {
5324                         print ' '.
5325                               Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
5326                               ' '.$number_of_git_cmds;
5327                 }
5328                 print "\n";
5329
5330                 return;
5331         }
5332
5333         # page header
5334         git_header_html();
5335         my $formats_nav =
5336                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5337                         "blob") .
5338                 " | ";
5339         if ($format eq 'incremental') {
5340                 $formats_nav .=
5341                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5342                                 "blame") . " (non-incremental)";
5343         } else {
5344                 $formats_nav .=
5345                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5346                                 "blame") . " (incremental)";
5347         }
5348         $formats_nav .=
5349                 " | " .
5350                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5351                         "history") .
5352                 " | " .
5353                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5354                         "HEAD");
5355         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5356         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5357         git_print_page_path($file_name, $ftype, $hash_base);
5358
5359         # page body
5360         if ($format eq 'incremental') {
5361                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5362                       "This page requires JavaScript to run.\n Use ".
5363                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5364                               'this page').
5365                       " instead.\n".
5366                       "</b></center></div>\n</noscript>\n";
5367
5368                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5369         }
5370
5371         print qq!<div class="page_body">\n!;
5372         print qq!<div id="progress_info">... / ...</div>\n!
5373                 if ($format eq 'incremental');
5374         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5375               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5376               qq!<thead>\n!.
5377               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5378               qq!</thead>\n!.
5379               qq!<tbody>\n!;
5380
5381         my @rev_color = qw(light dark);
5382         my $num_colors = scalar(@rev_color);
5383         my $current_color = 0;
5384
5385         if ($format eq 'incremental') {
5386                 my $color_class = $rev_color[$current_color];
5387
5388                 #contents of a file
5389                 my $linenr = 0;
5390         LINE:
5391                 while (my $line = <$fd>) {
5392                         chomp $line;
5393                         $linenr++;
5394
5395                         print qq!<tr id="l$linenr" class="$color_class">!.
5396                               qq!<td class="sha1"><a href=""> </a></td>!.
5397                               qq!<td class="linenr">!.
5398                               qq!<a class="linenr" href="">$linenr</a></td>!;
5399                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5400                         print qq!</tr>\n!;
5401                 }
5402
5403         } else { # porcelain, i.e. ordinary blame
5404                 my %metainfo = (); # saves information about commits
5405
5406                 # blame data
5407         LINE:
5408                 while (my $line = <$fd>) {
5409                         chomp $line;
5410                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5411                         # no <lines in group> for subsequent lines in group of lines
5412                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5413                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5414                         if (!exists $metainfo{$full_rev}) {
5415                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5416                         }
5417                         my $meta = $metainfo{$full_rev};
5418                         my $data;
5419                         while ($data = <$fd>) {
5420                                 chomp $data;
5421                                 last if ($data =~ s/^\t//); # contents of line
5422                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5423                                         $meta->{$1} = $2 unless exists $meta->{$1};
5424                                 }
5425                                 if ($data =~ /^previous /) {
5426                                         $meta->{'nprevious'}++;
5427                                 }
5428                         }
5429                         my $short_rev = substr($full_rev, 0, 8);
5430                         my $author = $meta->{'author'};
5431                         my %date =
5432                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5433                         my $date = $date{'iso-tz'};
5434                         if ($group_size) {
5435                                 $current_color = ($current_color + 1) % $num_colors;
5436                         }
5437                         my $tr_class = $rev_color[$current_color];
5438                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5439                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5440                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5441                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5442                         if ($group_size) {
5443                                 print "<td class=\"sha1\"";
5444                                 print " title=\"". esc_html($author) . ", $date\"";
5445                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5446                                 print ">";
5447                                 print $cgi->a({-href => href(action=>"commit",
5448                                                              hash=>$full_rev,
5449                                                              file_name=>$file_name)},
5450                                               esc_html($short_rev));
5451                                 if ($group_size >= 2) {
5452                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5453                                         if (@author_initials) {
5454                                                 print "<br />" .
5455                                                       esc_html(join('', @author_initials));
5456                                                 #           or join('.', ...)
5457                                         }
5458                                 }
5459                                 print "</td>\n";
5460                         }
5461                         # 'previous' <sha1 of parent commit> <filename at commit>
5462                         if (exists $meta->{'previous'} &&
5463                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5464                                 $meta->{'parent'} = $1;
5465                                 $meta->{'file_parent'} = unquote($2);
5466                         }
5467                         my $linenr_commit =
5468                                 exists($meta->{'parent'}) ?
5469                                 $meta->{'parent'} : $full_rev;
5470                         my $linenr_filename =
5471                                 exists($meta->{'file_parent'}) ?
5472                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5473                         my $blamed = href(action => 'blame',
5474                                           file_name => $linenr_filename,
5475                                           hash_base => $linenr_commit);
5476                         print "<td class=\"linenr\">";
5477                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5478                                         -class => "linenr" },
5479                                       esc_html($lineno));
5480                         print "</td>";
5481                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5482                         print "</tr>\n";
5483                 } # end while
5484
5485         }
5486
5487         # footer
5488         print "</tbody>\n".
5489               "</table>\n"; # class="blame"
5490         print "</div>\n";   # class="blame_body"
5491         close $fd
5492                 or print "Reading blob failed\n";
5493
5494         git_footer_html();
5495 }
5496
5497 sub git_blame {
5498         git_blame_common();
5499 }
5500
5501 sub git_blame_incremental {
5502         git_blame_common('incremental');
5503 }
5504
5505 sub git_blame_data {
5506         git_blame_common('data');
5507 }
5508
5509 sub git_tags {
5510         my $head = git_get_head_hash($project);
5511         git_header_html();
5512         git_print_page_nav('','', $head,undef,$head);
5513         git_print_header_div('summary', $project);
5514
5515         my @tagslist = git_get_tags_list();
5516         if (@tagslist) {
5517                 git_tags_body(\@tagslist);
5518         }
5519         git_footer_html();
5520 }
5521
5522 sub git_heads {
5523         my $head = git_get_head_hash($project);
5524         git_header_html();
5525         git_print_page_nav('','', $head,undef,$head);
5526         git_print_header_div('summary', $project);
5527
5528         my @headslist = git_get_heads_list();
5529         if (@headslist) {
5530                 git_heads_body(\@headslist, $head);
5531         }
5532         git_footer_html();
5533 }
5534
5535 sub git_blob_plain {
5536         my $type = shift;
5537         my $expires;
5538
5539         if (!defined $hash) {
5540                 if (defined $file_name) {
5541                         my $base = $hash_base || git_get_head_hash($project);
5542                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5543                                 or die_error(404, "Cannot find file");
5544                 } else {
5545                         die_error(400, "No file name defined");
5546                 }
5547         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5548                 # blobs defined by non-textual hash id's can be cached
5549                 $expires = "+1d";
5550         }
5551
5552         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5553                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5554
5555         # content-type (can include charset)
5556         $type = blob_contenttype($fd, $file_name, $type);
5557
5558         # "save as" filename, even when no $file_name is given
5559         my $save_as = "$hash";
5560         if (defined $file_name) {
5561                 $save_as = $file_name;
5562         } elsif ($type =~ m/^text\//) {
5563                 $save_as .= '.txt';
5564         }
5565
5566         # With XSS prevention on, blobs of all types except a few known safe
5567         # ones are served with "Content-Disposition: attachment" to make sure
5568         # they don't run in our security domain.  For certain image types,
5569         # blob view writes an <img> tag referring to blob_plain view, and we
5570         # want to be sure not to break that by serving the image as an
5571         # attachment (though Firefox 3 doesn't seem to care).
5572         my $sandbox = $prevent_xss &&
5573                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5574
5575         print $cgi->header(
5576                 -type => $type,
5577                 -expires => $expires,
5578                 -content_disposition =>
5579                         ($sandbox ? 'attachment' : 'inline')
5580                         . '; filename="' . $save_as . '"');
5581         local $/ = undef;
5582         binmode STDOUT, ':raw';
5583         print <$fd>;
5584         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5585         close $fd;
5586 }
5587
5588 sub git_blob {
5589         my $expires;
5590
5591         if (!defined $hash) {
5592                 if (defined $file_name) {
5593                         my $base = $hash_base || git_get_head_hash($project);
5594                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5595                                 or die_error(404, "Cannot find file");
5596                 } else {
5597                         die_error(400, "No file name defined");
5598                 }
5599         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5600                 # blobs defined by non-textual hash id's can be cached
5601                 $expires = "+1d";
5602         }
5603
5604         my $have_blame = gitweb_check_feature('blame');
5605         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5606                 or die_error(500, "Couldn't cat $file_name, $hash");
5607         my $mimetype = blob_mimetype($fd, $file_name);
5608         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
5609         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5610                 close $fd;
5611                 return git_blob_plain($mimetype);
5612         }
5613         # we can have blame only for text/* mimetype
5614         $have_blame &&= ($mimetype =~ m!^text/!);
5615
5616         my $highlight = gitweb_check_feature('highlight');
5617         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
5618         $fd = run_highlighter($fd, $highlight, $syntax)
5619                 if $syntax;
5620
5621         git_header_html(undef, $expires);
5622         my $formats_nav = '';
5623         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5624                 if (defined $file_name) {
5625                         if ($have_blame) {
5626                                 $formats_nav .=
5627                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5628                                                 "blame") .
5629                                         " | ";
5630                         }
5631                         $formats_nav .=
5632                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5633                                         "history") .
5634                                 " | " .
5635                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5636                                         "raw") .
5637                                 " | " .
5638                                 $cgi->a({-href => href(action=>"blob",
5639                                                        hash_base=>"HEAD", file_name=>$file_name)},
5640                                         "HEAD");
5641                 } else {
5642                         $formats_nav .=
5643                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5644                                         "raw");
5645                 }
5646                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5647                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5648         } else {
5649                 print "<div class=\"page_nav\">\n" .
5650                       "<br/><br/></div>\n" .
5651                       "<div class=\"title\">".esc_html($hash)."</div>\n";
5652         }
5653         git_print_page_path($file_name, "blob", $hash_base);
5654         print "<div class=\"page_body\">\n";
5655         if ($mimetype =~ m!^image/!) {
5656                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
5657                 if ($file_name) {
5658                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
5659                 }
5660                 print qq! src="! .
5661                       href(action=>"blob_plain", hash=>$hash,
5662                            hash_base=>$hash_base, file_name=>$file_name) .
5663                       qq!" />\n!;
5664         } else {
5665                 my $nr;
5666                 while (my $line = <$fd>) {
5667                         chomp $line;
5668                         $nr++;
5669                         $line = untabify($line);
5670                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
5671                                $nr, esc_attr(href(-replay => 1)), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
5672                 }
5673         }
5674         close $fd
5675                 or print "Reading blob failed.\n";
5676         print "</div>";
5677         git_footer_html();
5678 }
5679
5680 sub git_tree {
5681         if (!defined $hash_base) {
5682                 $hash_base = "HEAD";
5683         }
5684         if (!defined $hash) {
5685                 if (defined $file_name) {
5686                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5687                 } else {
5688                         $hash = $hash_base;
5689                 }
5690         }
5691         die_error(404, "No such tree") unless defined($hash);
5692
5693         my $show_sizes = gitweb_check_feature('show-sizes');
5694         my $have_blame = gitweb_check_feature('blame');
5695
5696         my @entries = ();
5697         {
5698                 local $/ = "\0";
5699                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5700                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5701                         or die_error(500, "Open git-ls-tree failed");
5702                 @entries = map { chomp; $_ } <$fd>;
5703                 close $fd
5704                         or die_error(404, "Reading tree failed");
5705         }
5706
5707         my $refs = git_get_references();
5708         my $ref = format_ref_marker($refs, $hash_base);
5709         git_header_html();
5710         my $basedir = '';
5711         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5712                 my @views_nav = ();
5713                 if (defined $file_name) {
5714                         push @views_nav,
5715                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5716                                         "history"),
5717                                 $cgi->a({-href => href(action=>"tree",
5718                                                        hash_base=>"HEAD", file_name=>$file_name)},
5719                                         "HEAD"),
5720                 }
5721                 my $snapshot_links = format_snapshot_links($hash);
5722                 if (defined $snapshot_links) {
5723                         # FIXME: Should be available when we have no hash base as well.
5724                         push @views_nav, $snapshot_links;
5725                 }
5726                 git_print_page_nav('tree','', $hash_base, undef, undef,
5727                                    join(' | ', @views_nav));
5728                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5729         } else {
5730                 undef $hash_base;
5731                 print "<div class=\"page_nav\">\n";
5732                 print "<br/><br/></div>\n";
5733                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
5734         }
5735         if (defined $file_name) {
5736                 $basedir = $file_name;
5737                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5738                         $basedir .= '/';
5739                 }
5740                 git_print_page_path($file_name, 'tree', $hash_base);
5741         }
5742         print "<div class=\"page_body\">\n";
5743         print "<table class=\"tree\">\n";
5744         my $alternate = 1;
5745         # '..' (top directory) link if possible
5746         if (defined $hash_base &&
5747             defined $file_name && $file_name =~ m![^/]+$!) {
5748                 if ($alternate) {
5749                         print "<tr class=\"dark\">\n";
5750                 } else {
5751                         print "<tr class=\"light\">\n";
5752                 }
5753                 $alternate ^= 1;
5754
5755                 my $up = $file_name;
5756                 $up =~ s!/?[^/]+$!!;
5757                 undef $up unless $up;
5758                 # based on git_print_tree_entry
5759                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5760                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5761                 print '<td class="list">';
5762                 print $cgi->a({-href => href(action=>"tree",
5763                                              hash_base=>$hash_base,
5764                                              file_name=>$up)},
5765                               "..");
5766                 print "</td>\n";
5767                 print "<td class=\"link\"></td>\n";
5768
5769                 print "</tr>\n";
5770         }
5771         foreach my $line (@entries) {
5772                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5773
5774                 if ($alternate) {
5775                         print "<tr class=\"dark\">\n";
5776                 } else {
5777                         print "<tr class=\"light\">\n";
5778                 }
5779                 $alternate ^= 1;
5780
5781                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5782
5783                 print "</tr>\n";
5784         }
5785         print "</table>\n" .
5786               "</div>";
5787         git_footer_html();
5788 }
5789
5790 sub snapshot_name {
5791         my ($project, $hash) = @_;
5792
5793         # path/to/project.git  -> project
5794         # path/to/project/.git -> project
5795         my $name = to_utf8($project);
5796         $name =~ s,([^/])/*\.git$,$1,;
5797         $name = basename($name);
5798         # sanitize name
5799         $name =~ s/[[:cntrl:]]/?/g;
5800
5801         my $ver = $hash;
5802         if ($hash =~ /^[0-9a-fA-F]+$/) {
5803                 # shorten SHA-1 hash
5804                 my $full_hash = git_get_full_hash($project, $hash);
5805                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
5806                         $ver = git_get_short_hash($project, $hash);
5807                 }
5808         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
5809                 # tags don't need shortened SHA-1 hash
5810                 $ver = $1;
5811         } else {
5812                 # branches and other need shortened SHA-1 hash
5813                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
5814                         $ver = $1;
5815                 }
5816                 $ver .= '-' . git_get_short_hash($project, $hash);
5817         }
5818         # in case of hierarchical branch names
5819         $ver =~ s!/!.!g;
5820
5821         # name = project-version_string
5822         $name = "$name-$ver";
5823
5824         return wantarray ? ($name, $name) : $name;
5825 }
5826
5827 sub git_snapshot {
5828         my $format = $input_params{'snapshot_format'};
5829         if (!@snapshot_fmts) {
5830                 die_error(403, "Snapshots not allowed");
5831         }
5832         # default to first supported snapshot format
5833         $format ||= $snapshot_fmts[0];
5834         if ($format !~ m/^[a-z0-9]+$/) {
5835                 die_error(400, "Invalid snapshot format parameter");
5836         } elsif (!exists($known_snapshot_formats{$format})) {
5837                 die_error(400, "Unknown snapshot format");
5838         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5839                 die_error(403, "Snapshot format not allowed");
5840         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5841                 die_error(403, "Unsupported snapshot format");
5842         }
5843
5844         my $type = git_get_type("$hash^{}");
5845         if (!$type) {
5846                 die_error(404, 'Object does not exist');
5847         }  elsif ($type eq 'blob') {
5848                 die_error(400, 'Object is not a tree-ish');
5849         }
5850
5851         my ($name, $prefix) = snapshot_name($project, $hash);
5852         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
5853         my $cmd = quote_command(
5854                 git_cmd(), 'archive',
5855                 "--format=$known_snapshot_formats{$format}{'format'}",
5856                 "--prefix=$prefix/", $hash);
5857         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5858                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5859         }
5860
5861         $filename =~ s/(["\\])/\\$1/g;
5862         print $cgi->header(
5863                 -type => $known_snapshot_formats{$format}{'type'},
5864                 -content_disposition => 'inline; filename="' . $filename . '"',
5865                 -status => '200 OK');
5866
5867         open my $fd, "-|", $cmd
5868                 or die_error(500, "Execute git-archive failed");
5869         binmode STDOUT, ':raw';
5870         print <$fd>;
5871         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5872         close $fd;
5873 }
5874
5875 sub git_log_generic {
5876         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
5877
5878         my $head = git_get_head_hash($project);
5879         my $allrefs;
5880         if (!defined $base) {
5881                 $base = $head;
5882                 $allrefs = 1;
5883         }
5884         if (!defined $page) {
5885                 $page = 0;
5886         }
5887         my $refs = git_get_references();
5888
5889         my $commit_hash = $base;
5890         if (defined $allrefs) {
5891                 $commit_hash = "--all";
5892         }
5893         if (defined $parent) {
5894                 $commit_hash = "$parent..$base";
5895         }
5896         my @commitlist =
5897                 parse_commits($commit_hash, 101, (100 * $page),
5898                               defined $file_name ? ($file_name, "--full-history") : ());
5899
5900         my $ftype;
5901         if (!defined $file_hash && defined $file_name) {
5902                 # some commits could have deleted file in question,
5903                 # and not have it in tree, but one of them has to have it
5904                 for (my $i = 0; $i < @commitlist; $i++) {
5905                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5906                         last if defined $file_hash;
5907                 }
5908         }
5909         if (defined $file_hash) {
5910                 $ftype = git_get_type($file_hash);
5911         }
5912         if (defined $file_name && !defined $ftype) {
5913                 die_error(500, "Unknown type of object");
5914         }
5915         my %co;
5916         if (defined $file_name) {
5917                 %co = parse_commit($base)
5918                         or die_error(404, "Unknown commit object");
5919         }
5920
5921
5922         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
5923         my $next_link = '';
5924         if ($#commitlist >= 100) {
5925                 $next_link =
5926                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5927                                  -accesskey => "n", -title => "Alt-n"}, "next");
5928         }
5929         my $patch_max = gitweb_get_feature('patches');
5930         if ($patch_max && !defined $file_name) {
5931                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5932                         $paging_nav .= " &sdot; " .
5933                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5934                                         "patches");
5935                 }
5936         }
5937
5938         git_header_html();
5939         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
5940         if (defined $file_name) {
5941                 git_print_header_div('commit', esc_html($co{'title'}), $base);
5942         } else {
5943                 git_print_header_div('summary', $project)
5944         }
5945         git_print_page_path($file_name, $ftype, $hash_base)
5946                 if (defined $file_name);
5947
5948         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
5949                      $file_name, $file_hash, $ftype, $allrefs);
5950
5951         git_footer_html();
5952 }
5953
5954 sub git_log {
5955         git_log_generic('log', \&git_log_body,
5956                         $hash, $hash_parent);
5957 }
5958
5959 sub git_commit {
5960         $hash ||= $hash_base || "HEAD";
5961         my %co = parse_commit($hash)
5962             or die_error(404, "Unknown commit object");
5963
5964         my $parent  = $co{'parent'};
5965         my $parents = $co{'parents'}; # listref
5966
5967         # we need to prepare $formats_nav before any parameter munging
5968         my $formats_nav;
5969         if (!defined $parent) {
5970                 # --root commitdiff
5971                 $formats_nav .= '(initial)';
5972         } elsif (@$parents == 1) {
5973                 # single parent commit
5974                 $formats_nav .=
5975                         '(parent: ' .
5976                         $cgi->a({-href => href(action=>"commit",
5977                                                hash=>$parent)},
5978                                 esc_html(substr($parent, 0, 7))) .
5979                         ')';
5980         } else {
5981                 # merge commit
5982                 $formats_nav .=
5983                         '(merge: ' .
5984                         join(' ', map {
5985                                 $cgi->a({-href => href(action=>"commit",
5986                                                        hash=>$_)},
5987                                         esc_html(substr($_, 0, 7)));
5988                         } @$parents ) .
5989                         ')';
5990         }
5991         if (gitweb_check_feature('patches') && @$parents <= 1) {
5992                 $formats_nav .= " | " .
5993                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5994                                 "patch");
5995         }
5996
5997         if (!defined $parent) {
5998                 $parent = "--root";
5999         }
6000         my @difftree;
6001         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
6002                 @diff_opts,
6003                 (@$parents <= 1 ? $parent : '-c'),
6004                 $hash, "--"
6005                 or die_error(500, "Open git-diff-tree failed");
6006         @difftree = map { chomp; $_ } <$fd>;
6007         close $fd or die_error(404, "Reading git-diff-tree failed");
6008
6009         # non-textual hash id's can be cached
6010         my $expires;
6011         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6012                 $expires = "+1d";
6013         }
6014         my $refs = git_get_references();
6015         my $ref = format_ref_marker($refs, $co{'id'});
6016
6017         git_header_html(undef, $expires);
6018         git_print_page_nav('commit', '',
6019                            $hash, $co{'tree'}, $hash,
6020                            $formats_nav);
6021
6022         if (defined $co{'parent'}) {
6023                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
6024         } else {
6025                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
6026         }
6027         print "<div class=\"title_text\">\n" .
6028               "<table class=\"object_header\">\n";
6029         git_print_authorship_rows(\%co);
6030         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
6031         print "<tr>" .
6032               "<td>tree</td>" .
6033               "<td class=\"sha1\">" .
6034               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
6035                        class => "list"}, $co{'tree'}) .
6036               "</td>" .
6037               "<td class=\"link\">" .
6038               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6039                       "tree");
6040         my $snapshot_links = format_snapshot_links($hash);
6041         if (defined $snapshot_links) {
6042                 print " | " . $snapshot_links;
6043         }
6044         print "</td>" .
6045               "</tr>\n";
6046
6047         foreach my $par (@$parents) {
6048                 print "<tr>" .
6049                       "<td>parent</td>" .
6050                       "<td class=\"sha1\">" .
6051                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6052                                class => "list"}, $par) .
6053                       "</td>" .
6054                       "<td class=\"link\">" .
6055                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6056                       " | " .
6057                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6058                       "</td>" .
6059                       "</tr>\n";
6060         }
6061         print "</table>".
6062               "</div>\n";
6063
6064         print "<div class=\"page_body\">\n";
6065         git_print_log($co{'comment'});
6066         print "</div>\n";
6067
6068         git_difftree_body(\@difftree, $hash, @$parents);
6069
6070         git_footer_html();
6071 }
6072
6073 sub git_object {
6074         # object is defined by:
6075         # - hash or hash_base alone
6076         # - hash_base and file_name
6077         my $type;
6078
6079         # - hash or hash_base alone
6080         if ($hash || ($hash_base && !defined $file_name)) {
6081                 my $object_id = $hash || $hash_base;
6082
6083                 open my $fd, "-|", quote_command(
6084                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6085                         or die_error(404, "Object does not exist");
6086                 $type = <$fd>;
6087                 chomp $type;
6088                 close $fd
6089                         or die_error(404, "Object does not exist");
6090
6091         # - hash_base and file_name
6092         } elsif ($hash_base && defined $file_name) {
6093                 $file_name =~ s,/+$,,;
6094
6095                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6096                         or die_error(404, "Base object does not exist");
6097
6098                 # here errors should not hapen
6099                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6100                         or die_error(500, "Open git-ls-tree failed");
6101                 my $line = <$fd>;
6102                 close $fd;
6103
6104                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6105                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6106                         die_error(404, "File or directory for given base does not exist");
6107                 }
6108                 $type = $2;
6109                 $hash = $3;
6110         } else {
6111                 die_error(400, "Not enough information to find object");
6112         }
6113
6114         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6115                                           hash=>$hash, hash_base=>$hash_base,
6116                                           file_name=>$file_name),
6117                              -status => '302 Found');
6118 }
6119
6120 sub git_blobdiff {
6121         my $format = shift || 'html';
6122
6123         my $fd;
6124         my @difftree;
6125         my %diffinfo;
6126         my $expires;
6127
6128         # preparing $fd and %diffinfo for git_patchset_body
6129         # new style URI
6130         if (defined $hash_base && defined $hash_parent_base) {
6131                 if (defined $file_name) {
6132                         # read raw output
6133                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6134                                 $hash_parent_base, $hash_base,
6135                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6136                                 or die_error(500, "Open git-diff-tree failed");
6137                         @difftree = map { chomp; $_ } <$fd>;
6138                         close $fd
6139                                 or die_error(404, "Reading git-diff-tree failed");
6140                         @difftree
6141                                 or die_error(404, "Blob diff not found");
6142
6143                 } elsif (defined $hash &&
6144                          $hash =~ /[0-9a-fA-F]{40}/) {
6145                         # try to find filename from $hash
6146
6147                         # read filtered raw output
6148                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6149                                 $hash_parent_base, $hash_base, "--"
6150                                 or die_error(500, "Open git-diff-tree failed");
6151                         @difftree =
6152                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6153                                 # $hash == to_id
6154                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6155                                 map { chomp; $_ } <$fd>;
6156                         close $fd
6157                                 or die_error(404, "Reading git-diff-tree failed");
6158                         @difftree
6159                                 or die_error(404, "Blob diff not found");
6160
6161                 } else {
6162                         die_error(400, "Missing one of the blob diff parameters");
6163                 }
6164
6165                 if (@difftree > 1) {
6166                         die_error(400, "Ambiguous blob diff specification");
6167                 }
6168
6169                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6170                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6171                 $file_name   ||= $diffinfo{'to_file'};
6172
6173                 $hash_parent ||= $diffinfo{'from_id'};
6174                 $hash        ||= $diffinfo{'to_id'};
6175
6176                 # non-textual hash id's can be cached
6177                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6178                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6179                         $expires = '+1d';
6180                 }
6181
6182                 # open patch output
6183                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6184                         '-p', ($format eq 'html' ? "--full-index" : ()),
6185                         $hash_parent_base, $hash_base,
6186                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6187                         or die_error(500, "Open git-diff-tree failed");
6188         }
6189
6190         # old/legacy style URI -- not generated anymore since 1.4.3.
6191         if (!%diffinfo) {
6192                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6193         }
6194
6195         # header
6196         if ($format eq 'html') {
6197                 my $formats_nav =
6198                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6199                                 "raw");
6200                 git_header_html(undef, $expires);
6201                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6202                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6203                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6204                 } else {
6205                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6206                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
6207                 }
6208                 if (defined $file_name) {
6209                         git_print_page_path($file_name, "blob", $hash_base);
6210                 } else {
6211                         print "<div class=\"page_path\"></div>\n";
6212                 }
6213
6214         } elsif ($format eq 'plain') {
6215                 print $cgi->header(
6216                         -type => 'text/plain',
6217                         -charset => 'utf-8',
6218                         -expires => $expires,
6219                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6220
6221                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6222
6223         } else {
6224                 die_error(400, "Unknown blobdiff format");
6225         }
6226
6227         # patch
6228         if ($format eq 'html') {
6229                 print "<div class=\"page_body\">\n";
6230
6231                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6232                 close $fd;
6233
6234                 print "</div>\n"; # class="page_body"
6235                 git_footer_html();
6236
6237         } else {
6238                 while (my $line = <$fd>) {
6239                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6240                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6241
6242                         print $line;
6243
6244                         last if $line =~ m!^\+\+\+!;
6245                 }
6246                 local $/ = undef;
6247                 print <$fd>;
6248                 close $fd;
6249         }
6250 }
6251
6252 sub git_blobdiff_plain {
6253         git_blobdiff('plain');
6254 }
6255
6256 sub git_commitdiff {
6257         my %params = @_;
6258         my $format = $params{-format} || 'html';
6259
6260         my ($patch_max) = gitweb_get_feature('patches');
6261         if ($format eq 'patch') {
6262                 die_error(403, "Patch view not allowed") unless $patch_max;
6263         }
6264
6265         $hash ||= $hash_base || "HEAD";
6266         my %co = parse_commit($hash)
6267             or die_error(404, "Unknown commit object");
6268
6269         # choose format for commitdiff for merge
6270         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6271                 $hash_parent = '--cc';
6272         }
6273         # we need to prepare $formats_nav before almost any parameter munging
6274         my $formats_nav;
6275         if ($format eq 'html') {
6276                 $formats_nav =
6277                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6278                                 "raw");
6279                 if ($patch_max && @{$co{'parents'}} <= 1) {
6280                         $formats_nav .= " | " .
6281                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6282                                         "patch");
6283                 }
6284
6285                 if (defined $hash_parent &&
6286                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6287                         # commitdiff with two commits given
6288                         my $hash_parent_short = $hash_parent;
6289                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6290                                 $hash_parent_short = substr($hash_parent, 0, 7);
6291                         }
6292                         $formats_nav .=
6293                                 ' (from';
6294                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6295                                 if ($co{'parents'}[$i] eq $hash_parent) {
6296                                         $formats_nav .= ' parent ' . ($i+1);
6297                                         last;
6298                                 }
6299                         }
6300                         $formats_nav .= ': ' .
6301                                 $cgi->a({-href => href(action=>"commitdiff",
6302                                                        hash=>$hash_parent)},
6303                                         esc_html($hash_parent_short)) .
6304                                 ')';
6305                 } elsif (!$co{'parent'}) {
6306                         # --root commitdiff
6307                         $formats_nav .= ' (initial)';
6308                 } elsif (scalar @{$co{'parents'}} == 1) {
6309                         # single parent commit
6310                         $formats_nav .=
6311                                 ' (parent: ' .
6312                                 $cgi->a({-href => href(action=>"commitdiff",
6313                                                        hash=>$co{'parent'})},
6314                                         esc_html(substr($co{'parent'}, 0, 7))) .
6315                                 ')';
6316                 } else {
6317                         # merge commit
6318                         if ($hash_parent eq '--cc') {
6319                                 $formats_nav .= ' | ' .
6320                                         $cgi->a({-href => href(action=>"commitdiff",
6321                                                                hash=>$hash, hash_parent=>'-c')},
6322                                                 'combined');
6323                         } else { # $hash_parent eq '-c'
6324                                 $formats_nav .= ' | ' .
6325                                         $cgi->a({-href => href(action=>"commitdiff",
6326                                                                hash=>$hash, hash_parent=>'--cc')},
6327                                                 'compact');
6328                         }
6329                         $formats_nav .=
6330                                 ' (merge: ' .
6331                                 join(' ', map {
6332                                         $cgi->a({-href => href(action=>"commitdiff",
6333                                                                hash=>$_)},
6334                                                 esc_html(substr($_, 0, 7)));
6335                                 } @{$co{'parents'}} ) .
6336                                 ')';
6337                 }
6338         }
6339
6340         my $hash_parent_param = $hash_parent;
6341         if (!defined $hash_parent_param) {
6342                 # --cc for multiple parents, --root for parentless
6343                 $hash_parent_param =
6344                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6345         }
6346
6347         # read commitdiff
6348         my $fd;
6349         my @difftree;
6350         if ($format eq 'html') {
6351                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6352                         "--no-commit-id", "--patch-with-raw", "--full-index",
6353                         $hash_parent_param, $hash, "--"
6354                         or die_error(500, "Open git-diff-tree failed");
6355
6356                 while (my $line = <$fd>) {
6357                         chomp $line;
6358                         # empty line ends raw part of diff-tree output
6359                         last unless $line;
6360                         push @difftree, scalar parse_difftree_raw_line($line);
6361                 }
6362
6363         } elsif ($format eq 'plain') {
6364                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6365                         '-p', $hash_parent_param, $hash, "--"
6366                         or die_error(500, "Open git-diff-tree failed");
6367         } elsif ($format eq 'patch') {
6368                 # For commit ranges, we limit the output to the number of
6369                 # patches specified in the 'patches' feature.
6370                 # For single commits, we limit the output to a single patch,
6371                 # diverging from the git-format-patch default.
6372                 my @commit_spec = ();
6373                 if ($hash_parent) {
6374                         if ($patch_max > 0) {
6375                                 push @commit_spec, "-$patch_max";
6376                         }
6377                         push @commit_spec, '-n', "$hash_parent..$hash";
6378                 } else {
6379                         if ($params{-single}) {
6380                                 push @commit_spec, '-1';
6381                         } else {
6382                                 if ($patch_max > 0) {
6383                                         push @commit_spec, "-$patch_max";
6384                                 }
6385                                 push @commit_spec, "-n";
6386                         }
6387                         push @commit_spec, '--root', $hash;
6388                 }
6389                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
6390                         '--stdout', @commit_spec
6391                         or die_error(500, "Open git-format-patch failed");
6392         } else {
6393                 die_error(400, "Unknown commitdiff format");
6394         }
6395
6396         # non-textual hash id's can be cached
6397         my $expires;
6398         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6399                 $expires = "+1d";
6400         }
6401
6402         # write commit message
6403         if ($format eq 'html') {
6404                 my $refs = git_get_references();
6405                 my $ref = format_ref_marker($refs, $co{'id'});
6406
6407                 git_header_html(undef, $expires);
6408                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6409                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6410                 print "<div class=\"title_text\">\n" .
6411                       "<table class=\"object_header\">\n";
6412                 git_print_authorship_rows(\%co);
6413                 print "</table>".
6414                       "</div>\n";
6415                 print "<div class=\"page_body\">\n";
6416                 if (@{$co{'comment'}} > 1) {
6417                         print "<div class=\"log\">\n";
6418                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6419                         print "</div>\n"; # class="log"
6420                 }
6421
6422         } elsif ($format eq 'plain') {
6423                 my $refs = git_get_references("tags");
6424                 my $tagname = git_get_rev_name_tags($hash);
6425                 my $filename = basename($project) . "-$hash.patch";
6426
6427                 print $cgi->header(
6428                         -type => 'text/plain',
6429                         -charset => 'utf-8',
6430                         -expires => $expires,
6431                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6432                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6433                 print "From: " . to_utf8($co{'author'}) . "\n";
6434                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6435                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6436
6437                 print "X-Git-Tag: $tagname\n" if $tagname;
6438                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6439
6440                 foreach my $line (@{$co{'comment'}}) {
6441                         print to_utf8($line) . "\n";
6442                 }
6443                 print "---\n\n";
6444         } elsif ($format eq 'patch') {
6445                 my $filename = basename($project) . "-$hash.patch";
6446
6447                 print $cgi->header(
6448                         -type => 'text/plain',
6449                         -charset => 'utf-8',
6450                         -expires => $expires,
6451                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6452         }
6453
6454         # write patch
6455         if ($format eq 'html') {
6456                 my $use_parents = !defined $hash_parent ||
6457                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6458                 git_difftree_body(\@difftree, $hash,
6459                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6460                 print "<br/>\n";
6461
6462                 git_patchset_body($fd, \@difftree, $hash,
6463                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6464                 close $fd;
6465                 print "</div>\n"; # class="page_body"
6466                 git_footer_html();
6467
6468         } elsif ($format eq 'plain') {
6469                 local $/ = undef;
6470                 print <$fd>;
6471                 close $fd
6472                         or print "Reading git-diff-tree failed\n";
6473         } elsif ($format eq 'patch') {
6474                 local $/ = undef;
6475                 print <$fd>;
6476                 close $fd
6477                         or print "Reading git-format-patch failed\n";
6478         }
6479 }
6480
6481 sub git_commitdiff_plain {
6482         git_commitdiff(-format => 'plain');
6483 }
6484
6485 # format-patch-style patches
6486 sub git_patch {
6487         git_commitdiff(-format => 'patch', -single => 1);
6488 }
6489
6490 sub git_patches {
6491         git_commitdiff(-format => 'patch');
6492 }
6493
6494 sub git_history {
6495         git_log_generic('history', \&git_history_body,
6496                         $hash_base, $hash_parent_base,
6497                         $file_name, $hash);
6498 }
6499
6500 sub git_search {
6501         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6502         if (!defined $searchtext) {
6503                 die_error(400, "Text field is empty");
6504         }
6505         if (!defined $hash) {
6506                 $hash = git_get_head_hash($project);
6507         }
6508         my %co = parse_commit($hash);
6509         if (!%co) {
6510                 die_error(404, "Unknown commit object");
6511         }
6512         if (!defined $page) {
6513                 $page = 0;
6514         }
6515
6516         $searchtype ||= 'commit';
6517         if ($searchtype eq 'pickaxe') {
6518                 # pickaxe may take all resources of your box and run for several minutes
6519                 # with every query - so decide by yourself how public you make this feature
6520                 gitweb_check_feature('pickaxe')
6521                     or die_error(403, "Pickaxe is disabled");
6522         }
6523         if ($searchtype eq 'grep') {
6524                 gitweb_check_feature('grep')
6525                     or die_error(403, "Grep is disabled");
6526         }
6527
6528         git_header_html();
6529
6530         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6531                 my $greptype;
6532                 if ($searchtype eq 'commit') {
6533                         $greptype = "--grep=";
6534                 } elsif ($searchtype eq 'author') {
6535                         $greptype = "--author=";
6536                 } elsif ($searchtype eq 'committer') {
6537                         $greptype = "--committer=";
6538                 }
6539                 $greptype .= $searchtext;
6540                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6541                                                $greptype, '--regexp-ignore-case',
6542                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6543
6544                 my $paging_nav = '';
6545                 if ($page > 0) {
6546                         $paging_nav .=
6547                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6548                                                        searchtext=>$searchtext,
6549                                                        searchtype=>$searchtype)},
6550                                         "first");
6551                         $paging_nav .= " &sdot; " .
6552                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6553                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6554                 } else {
6555                         $paging_nav .= "first";
6556                         $paging_nav .= " &sdot; prev";
6557                 }
6558                 my $next_link = '';
6559                 if ($#commitlist >= 100) {
6560                         $next_link =
6561                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6562                                          -accesskey => "n", -title => "Alt-n"}, "next");
6563                         $paging_nav .= " &sdot; $next_link";
6564                 } else {
6565                         $paging_nav .= " &sdot; next";
6566                 }
6567
6568                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6569                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6570                 if ($page == 0 && !@commitlist) {
6571                         print "<p>No match.</p>\n";
6572                 } else {
6573                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
6574                 }
6575         }
6576
6577         if ($searchtype eq 'pickaxe') {
6578                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6579                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6580
6581                 print "<table class=\"pickaxe search\">\n";
6582                 my $alternate = 1;
6583                 local $/ = "\n";
6584                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6585                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6586                         ($search_use_regexp ? '--pickaxe-regex' : ());
6587                 undef %co;
6588                 my @files;
6589                 while (my $line = <$fd>) {
6590                         chomp $line;
6591                         next unless $line;
6592
6593                         my %set = parse_difftree_raw_line($line);
6594                         if (defined $set{'commit'}) {
6595                                 # finish previous commit
6596                                 if (%co) {
6597                                         print "</td>\n" .
6598                                               "<td class=\"link\">" .
6599                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6600                                               " | " .
6601                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6602                                         print "</td>\n" .
6603                                               "</tr>\n";
6604                                 }
6605
6606                                 if ($alternate) {
6607                                         print "<tr class=\"dark\">\n";
6608                                 } else {
6609                                         print "<tr class=\"light\">\n";
6610                                 }
6611                                 $alternate ^= 1;
6612                                 %co = parse_commit($set{'commit'});
6613                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6614                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6615                                       "<td><i>$author</i></td>\n" .
6616                                       "<td>" .
6617                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6618                                               -class => "list subject"},
6619                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6620                         } elsif (defined $set{'to_id'}) {
6621                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6622
6623                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6624                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6625                                               -class => "list"},
6626                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6627                                       "<br/>\n";
6628                         }
6629                 }
6630                 close $fd;
6631
6632                 # finish last commit (warning: repetition!)
6633                 if (%co) {
6634                         print "</td>\n" .
6635                               "<td class=\"link\">" .
6636                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6637                               " | " .
6638                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6639                         print "</td>\n" .
6640                               "</tr>\n";
6641                 }
6642
6643                 print "</table>\n";
6644         }
6645
6646         if ($searchtype eq 'grep') {
6647                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6648                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6649
6650                 print "<table class=\"grep_search\">\n";
6651                 my $alternate = 1;
6652                 my $matches = 0;
6653                 local $/ = "\n";
6654                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6655                         $search_use_regexp ? ('-E', '-i') : '-F',
6656                         $searchtext, $co{'tree'};
6657                 my $lastfile = '';
6658                 while (my $line = <$fd>) {
6659                         chomp $line;
6660                         my ($file, $lno, $ltext, $binary);
6661                         last if ($matches++ > 1000);
6662                         if ($line =~ /^Binary file (.+) matches$/) {
6663                                 $file = $1;
6664                                 $binary = 1;
6665                         } else {
6666                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6667                         }
6668                         if ($file ne $lastfile) {
6669                                 $lastfile and print "</td></tr>\n";
6670                                 if ($alternate++) {
6671                                         print "<tr class=\"dark\">\n";
6672                                 } else {
6673                                         print "<tr class=\"light\">\n";
6674                                 }
6675                                 print "<td class=\"list\">".
6676                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6677                                                                file_name=>"$file"),
6678                                                 -class => "list"}, esc_path($file));
6679                                 print "</td><td>\n";
6680                                 $lastfile = $file;
6681                         }
6682                         if ($binary) {
6683                                 print "<div class=\"binary\">Binary file</div>\n";
6684                         } else {
6685                                 $ltext = untabify($ltext);
6686                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6687                                         $ltext = esc_html($1, -nbsp=>1);
6688                                         $ltext .= '<span class="match">';
6689                                         $ltext .= esc_html($2, -nbsp=>1);
6690                                         $ltext .= '</span>';
6691                                         $ltext .= esc_html($3, -nbsp=>1);
6692                                 } else {
6693                                         $ltext = esc_html($ltext, -nbsp=>1);
6694                                 }
6695                                 print "<div class=\"pre\">" .
6696                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6697                                                                file_name=>"$file").'#l'.$lno,
6698                                                 -class => "linenr"}, sprintf('%4i', $lno))
6699                                         . ' ' .  $ltext . "</div>\n";
6700                         }
6701                 }
6702                 if ($lastfile) {
6703                         print "</td></tr>\n";
6704                         if ($matches > 1000) {
6705                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6706                         }
6707                 } else {
6708                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6709                 }
6710                 close $fd;
6711
6712                 print "</table>\n";
6713         }
6714         git_footer_html();
6715 }
6716
6717 sub git_search_help {
6718         git_header_html();
6719         git_print_page_nav('','', $hash,$hash,$hash);
6720         print <<EOT;
6721 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6722 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6723 the pattern entered is recognized as the POSIX extended
6724 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6725 insensitive).</p>
6726 <dl>
6727 <dt><b>commit</b></dt>
6728 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6729 EOT
6730         my $have_grep = gitweb_check_feature('grep');
6731         if ($have_grep) {
6732                 print <<EOT;
6733 <dt><b>grep</b></dt>
6734 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6735     a different one) are searched for the given pattern. On large trees, this search can take
6736 a while and put some strain on the server, so please use it with some consideration. Note that
6737 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6738 case-sensitive.</dd>
6739 EOT
6740         }
6741         print <<EOT;
6742 <dt><b>author</b></dt>
6743 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6744 <dt><b>committer</b></dt>
6745 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6746 EOT
6747         my $have_pickaxe = gitweb_check_feature('pickaxe');
6748         if ($have_pickaxe) {
6749                 print <<EOT;
6750 <dt><b>pickaxe</b></dt>
6751 <dd>All commits that caused the string to appear or disappear from any file (changes that
6752 added, removed or "modified" the string) will be listed. This search can take a while and
6753 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6754 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6755 EOT
6756         }
6757         print "</dl>\n";
6758         git_footer_html();
6759 }
6760
6761 sub git_shortlog {
6762         git_log_generic('shortlog', \&git_shortlog_body,
6763                         $hash, $hash_parent);
6764 }
6765
6766 ## ......................................................................
6767 ## feeds (RSS, Atom; OPML)
6768
6769 sub git_feed {
6770         my $format = shift || 'atom';
6771         my $have_blame = gitweb_check_feature('blame');
6772
6773         # Atom: http://www.atomenabled.org/developers/syndication/
6774         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6775         if ($format ne 'rss' && $format ne 'atom') {
6776                 die_error(400, "Unknown web feed format");
6777         }
6778
6779         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6780         my $head = $hash || 'HEAD';
6781         my @commitlist = parse_commits($head, 150, 0, $file_name);
6782
6783         my %latest_commit;
6784         my %latest_date;
6785         my $content_type = "application/$format+xml";
6786         if (defined $cgi->http('HTTP_ACCEPT') &&
6787                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6788                 # browser (feed reader) prefers text/xml
6789                 $content_type = 'text/xml';
6790         }
6791         if (defined($commitlist[0])) {
6792                 %latest_commit = %{$commitlist[0]};
6793                 my $latest_epoch = $latest_commit{'committer_epoch'};
6794                 %latest_date   = parse_date($latest_epoch);
6795                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6796                 if (defined $if_modified) {
6797                         my $since;
6798                         if (eval { require HTTP::Date; 1; }) {
6799                                 $since = HTTP::Date::str2time($if_modified);
6800                         } elsif (eval { require Time::ParseDate; 1; }) {
6801                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6802                         }
6803                         if (defined $since && $latest_epoch <= $since) {
6804                                 print $cgi->header(
6805                                         -type => $content_type,
6806                                         -charset => 'utf-8',
6807                                         -last_modified => $latest_date{'rfc2822'},
6808                                         -status => '304 Not Modified');
6809                                 return;
6810                         }
6811                 }
6812                 print $cgi->header(
6813                         -type => $content_type,
6814                         -charset => 'utf-8',
6815                         -last_modified => $latest_date{'rfc2822'});
6816         } else {
6817                 print $cgi->header(
6818                         -type => $content_type,
6819                         -charset => 'utf-8');
6820         }
6821
6822         # Optimization: skip generating the body if client asks only
6823         # for Last-Modified date.
6824         return if ($cgi->request_method() eq 'HEAD');
6825
6826         # header variables
6827         my $title = "$site_name - $project/$action";
6828         my $feed_type = 'log';
6829         if (defined $hash) {
6830                 $title .= " - '$hash'";
6831                 $feed_type = 'branch log';
6832                 if (defined $file_name) {
6833                         $title .= " :: $file_name";
6834                         $feed_type = 'history';
6835                 }
6836         } elsif (defined $file_name) {
6837                 $title .= " - $file_name";
6838                 $feed_type = 'history';
6839         }
6840         $title .= " $feed_type";
6841         my $descr = git_get_project_description($project);
6842         if (defined $descr) {
6843                 $descr = esc_html($descr);
6844         } else {
6845                 $descr = "$project " .
6846                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6847                          " feed";
6848         }
6849         my $owner = git_get_project_owner($project);
6850         $owner = esc_html($owner);
6851
6852         #header
6853         my $alt_url;
6854         if (defined $file_name) {
6855                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6856         } elsif (defined $hash) {
6857                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6858         } else {
6859                 $alt_url = href(-full=>1, action=>"summary");
6860         }
6861         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6862         if ($format eq 'rss') {
6863                 print <<XML;
6864 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6865 <channel>
6866 XML
6867                 print "<title>$title</title>\n" .
6868                       "<link>$alt_url</link>\n" .
6869                       "<description>$descr</description>\n" .
6870                       "<language>en</language>\n" .
6871                       # project owner is responsible for 'editorial' content
6872                       "<managingEditor>$owner</managingEditor>\n";
6873                 if (defined $logo || defined $favicon) {
6874                         # prefer the logo to the favicon, since RSS
6875                         # doesn't allow both
6876                         my $img = esc_url($logo || $favicon);
6877                         print "<image>\n" .
6878                               "<url>$img</url>\n" .
6879                               "<title>$title</title>\n" .
6880                               "<link>$alt_url</link>\n" .
6881                               "</image>\n";
6882                 }
6883                 if (%latest_date) {
6884                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6885                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6886                 }
6887                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6888         } elsif ($format eq 'atom') {
6889                 print <<XML;
6890 <feed xmlns="http://www.w3.org/2005/Atom">
6891 XML
6892                 print "<title>$title</title>\n" .
6893                       "<subtitle>$descr</subtitle>\n" .
6894                       '<link rel="alternate" type="text/html" href="' .
6895                       $alt_url . '" />' . "\n" .
6896                       '<link rel="self" type="' . $content_type . '" href="' .
6897                       $cgi->self_url() . '" />' . "\n" .
6898                       "<id>" . href(-full=>1) . "</id>\n" .
6899                       # use project owner for feed author
6900                       "<author><name>$owner</name></author>\n";
6901                 if (defined $favicon) {
6902                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6903                 }
6904                 if (defined $logo) {
6905                         # not twice as wide as tall: 72 x 27 pixels
6906                         print "<logo>" . esc_url($logo) . "</logo>\n";
6907                 }
6908                 if (! %latest_date) {
6909                         # dummy date to keep the feed valid until commits trickle in:
6910                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6911                 } else {
6912                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6913                 }
6914                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6915         }
6916
6917         # contents
6918         for (my $i = 0; $i <= $#commitlist; $i++) {
6919                 my %co = %{$commitlist[$i]};
6920                 my $commit = $co{'id'};
6921                 # we read 150, we always show 30 and the ones more recent than 48 hours
6922                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6923                         last;
6924                 }
6925                 my %cd = parse_date($co{'author_epoch'});
6926
6927                 # get list of changed files
6928                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6929                         $co{'parent'} || "--root",
6930                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6931                         or next;
6932                 my @difftree = map { chomp; $_ } <$fd>;
6933                 close $fd
6934                         or next;
6935
6936                 # print element (entry, item)
6937                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6938                 if ($format eq 'rss') {
6939                         print "<item>\n" .
6940                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6941                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6942                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6943                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6944                               "<link>$co_url</link>\n" .
6945                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6946                               "<content:encoded>" .
6947                               "<![CDATA[\n";
6948                 } elsif ($format eq 'atom') {
6949                         print "<entry>\n" .
6950                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6951                               "<updated>$cd{'iso-8601'}</updated>\n" .
6952                               "<author>\n" .
6953                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6954                         if ($co{'author_email'}) {
6955                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6956                         }
6957                         print "</author>\n" .
6958                               # use committer for contributor
6959                               "<contributor>\n" .
6960                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6961                         if ($co{'committer_email'}) {
6962                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6963                         }
6964                         print "</contributor>\n" .
6965                               "<published>$cd{'iso-8601'}</published>\n" .
6966                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6967                               "<id>$co_url</id>\n" .
6968                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6969                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6970                 }
6971                 my $comment = $co{'comment'};
6972                 print "<pre>\n";
6973                 foreach my $line (@$comment) {
6974                         $line = esc_html($line);
6975                         print "$line\n";
6976                 }
6977                 print "</pre><ul>\n";
6978                 foreach my $difftree_line (@difftree) {
6979                         my %difftree = parse_difftree_raw_line($difftree_line);
6980                         next if !$difftree{'from_id'};
6981
6982                         my $file = $difftree{'file'} || $difftree{'to_file'};
6983
6984                         print "<li>" .
6985                               "[" .
6986                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6987                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6988                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6989                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6990                                       -title => "diff"}, 'D');
6991                         if ($have_blame) {
6992                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6993                                                              file_name=>$file, hash_base=>$commit),
6994                                               -title => "blame"}, 'B');
6995                         }
6996                         # if this is not a feed of a file history
6997                         if (!defined $file_name || $file_name ne $file) {
6998                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6999                                                              file_name=>$file, hash=>$commit),
7000                                               -title => "history"}, 'H');
7001                         }
7002                         $file = esc_path($file);
7003                         print "] ".
7004                               "$file</li>\n";
7005                 }
7006                 if ($format eq 'rss') {
7007                         print "</ul>]]>\n" .
7008                               "</content:encoded>\n" .
7009                               "</item>\n";
7010                 } elsif ($format eq 'atom') {
7011                         print "</ul>\n</div>\n" .
7012                               "</content>\n" .
7013                               "</entry>\n";
7014                 }
7015         }
7016
7017         # end of feed
7018         if ($format eq 'rss') {
7019                 print "</channel>\n</rss>\n";
7020         } elsif ($format eq 'atom') {
7021                 print "</feed>\n";
7022         }
7023 }
7024
7025 sub git_rss {
7026         git_feed('rss');
7027 }
7028
7029 sub git_atom {
7030         git_feed('atom');
7031 }
7032
7033 sub git_opml {
7034         my @list = git_get_projects_list();
7035
7036         print $cgi->header(
7037                 -type => 'text/xml',
7038                 -charset => 'utf-8',
7039                 -content_disposition => 'inline; filename="opml.xml"');
7040
7041         print <<XML;
7042 <?xml version="1.0" encoding="utf-8"?>
7043 <opml version="1.0">
7044 <head>
7045   <title>$site_name OPML Export</title>
7046 </head>
7047 <body>
7048 <outline text="git RSS feeds">
7049 XML
7050
7051         foreach my $pr (@list) {
7052                 my %proj = %$pr;
7053                 my $head = git_get_head_hash($proj{'path'});
7054                 if (!defined $head) {
7055                         next;
7056                 }
7057                 $git_dir = "$projectroot/$proj{'path'}";
7058                 my %co = parse_commit($head);
7059                 if (!%co) {
7060                         next;
7061                 }
7062
7063                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7064                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7065                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7066                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7067         }
7068         print <<XML;
7069 </outline>
7070 </body>
7071 </opml>
7072 XML
7073 }