gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser set_message);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 our $t0;
  22 if (eval { require Time::HiRes; 1; }) {
  23         $t0 = [Time::HiRes::gettimeofday()];
  24 }
  25 our $number_of_git_cmds = 0;
  26
  27 BEGIN {
  28         CGI->compile() if $ENV{'MOD_PERL'};
  29 }
  30
  31 our $version = "++GIT_VERSION++";
  32
  33 our ($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 = "++GIT_BINDIR++/git";
  72
  73 # absolute fs-path which will be prepended to the project path
  74 #our $projectroot = "/pub/scm";
  75 our $projectroot = "++GITWEB_PROJECTROOT++";
  76
  77 # fs traversing limit for getting project list
  78 # the number is relative to the projectroot
  79 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  80
  81 # string of the home link on top of all pages
  82 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  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 $site_name = "++GITWEB_SITENAME++"
  87                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  88
  89 # filename of html text to include at top of each page
  90 our $site_header = "++GITWEB_SITE_HEADER++";
  91 # html text to include at home page
  92 our $home_text = "++GITWEB_HOMETEXT++";
  93 # filename of html text to include at bottom of each page
  94 our $site_footer = "++GITWEB_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 = "++GITWEB_LOGO++";
 102 # URI of GIT favicon, assumed to be image/png type
 103 our $favicon = "++GITWEB_FAVICON++";
 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 = "++GITWEB_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 $export_ok = "++GITWEB_EXPORT_OK++";
 126
 127 # show repository only if this subroutine returns true
 128 # when given the path to the project, for example:
 129 #    sub { return -e "$_[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 $strict_export = "++GITWEB_STRICT_EXPORT++";
 134
 135 # list of git base URLs used for URL to where fetch project from,
 136 # i.e. full URL is "$git_base_url/$project"
 137 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 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++";
 577         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 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         check_loadavg();
1041
1042         evaluate_query_params();
1043         evaluate_path_info();
1044         evaluate_and_validate_params();
1045         evaluate_git_dir();
1046
1047         configure_gitweb_features();
1048
1049         dispatch();
1050 }
1051
1052 our $is_last_request = sub { 1 };
1053 our ($pre_dispatch_hook, $post_dispatch_hook, $pre_listen_hook);
1054 our $CGI = 'CGI';
1055 our $cgi;
1056 sub configure_as_fcgi {
1057         require CGI::Fast;
1058         our $CGI = 'CGI::Fast';
1059
1060         my $request_number = 0;
1061         # let each child service 100 requests
1062         our $is_last_request = sub { ++$request_number > 100 };
1063 }
1064 sub evaluate_argv {
1065         my $script_name = $ENV{'SCRIPT_NAME'} || $ENV{'SCRIPT_FILENAME'} || __FILE__;
1066         configure_as_fcgi()
1067                 if $script_name =~ /\.fcgi$/;
1068
1069         return unless (@ARGV);
1070
1071         require Getopt::Long;
1072         Getopt::Long::GetOptions(
1073                 'fastcgi|fcgi|f' => \&configure_as_fcgi,
1074                 'nproc|n=i' => sub {
1075                         my ($arg, $val) = @_;
1076                         return unless eval { require FCGI::ProcManager; 1; };
1077                         my $proc_manager = FCGI::ProcManager->new({
1078                                 n_processes => $val,
1079                         });
1080                         our $pre_listen_hook    = sub { $proc_manager->pm_manage()        };
1081                         our $pre_dispatch_hook  = sub { $proc_manager->pm_pre_dispatch()  };
1082                         our $post_dispatch_hook = sub { $proc_manager->pm_post_dispatch() };
1083                 },
1084         );
1085 }
1086
1087 sub run {
1088         evaluate_argv();
1089         evaluate_gitweb_config();
1090         evaluate_git_version();
1091
1092         # $projectroot and $projects_list might be set in gitweb config file
1093         $projects_list ||= $projectroot;
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               $cgi->a({-href => esc_url($logo_url),
3501                        -title => $logo_label},
3502                       qq(<img src=").esc_url($logo).qq(" width="72" height="27" alt="git" class="logo"/>));
3503         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3504         if (defined $project) {
3505                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3506                 if (defined $action) {
3507                         print " / $action";
3508                 }
3509                 print "\n";
3510         }
3511         print "</div>\n";
3512
3513         my $have_search = gitweb_check_feature('search');
3514         if (defined $project && $have_search) {
3515                 if (!defined $searchtext) {
3516                         $searchtext = "";
3517                 }
3518                 my $search_hash;
3519                 if (defined $hash_base) {
3520                         $search_hash = $hash_base;
3521                 } elsif (defined $hash) {
3522                         $search_hash = $hash;
3523                 } else {
3524                         $search_hash = "HEAD";
3525                 }
3526                 my $action = $my_uri;
3527                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3528                 if ($use_pathinfo) {
3529                         $action .= "/".esc_url($project);
3530                 }
3531                 print $cgi->startform(-method => "get", -action => $action) .
3532                       "<div class=\"search\">\n" .
3533                       (!$use_pathinfo &&
3534                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3535                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3536                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3537                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3538                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3539                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3540                       " search:\n",
3541                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3542                       "<span title=\"Extended regular expression\">" .
3543                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3544                                      -checked => $search_use_regexp) .
3545                       "</span>" .
3546                       "</div>" .
3547                       $cgi->end_form() . "\n";
3548         }
3549 }
3550
3551 sub git_footer_html {
3552         my $feed_class = 'rss_logo';
3553
3554         print "<div class=\"page_footer\">\n";
3555         if (defined $project) {
3556                 my $descr = git_get_project_description($project);
3557                 if (defined $descr) {
3558                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3559                 }
3560
3561                 my %href_params = get_feed_info();
3562                 if (!%href_params) {
3563                         $feed_class .= ' generic';
3564                 }
3565                 $href_params{'-title'} ||= 'log';
3566
3567                 foreach my $format qw(RSS Atom) {
3568                         $href_params{'action'} = lc($format);
3569                         print $cgi->a({-href => href(%href_params),
3570                                       -title => "$href_params{'-title'} $format feed",
3571                                       -class => $feed_class}, $format)."\n";
3572                 }
3573
3574         } else {
3575                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3576                               -class => $feed_class}, "OPML") . " ";
3577                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3578                               -class => $feed_class}, "TXT") . "\n";
3579         }
3580         print "</div>\n"; # class="page_footer"
3581
3582         if (defined $t0 && gitweb_check_feature('timed')) {
3583                 print "<div id=\"generating_info\">\n";
3584                 print 'This page took '.
3585                       '<span id="generating_time" class="time_span">'.
3586                       Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
3587                       ' seconds </span>'.
3588                       ' and '.
3589                       '<span id="generating_cmd">'.
3590                       $number_of_git_cmds.
3591                       '</span> git commands '.
3592                       " to generate.\n";
3593                 print "</div>\n"; # class="page_footer"
3594         }
3595
3596         if (defined $site_footer && -f $site_footer) {
3597                 insert_file($site_footer);
3598         }
3599
3600         print qq!<script type="text/javascript" src="!.esc_url($javascript).qq!"></script>\n!;
3601         if (defined $action &&
3602             $action eq 'blame_incremental') {
3603                 print qq!<script type="text/javascript">\n!.
3604                       qq!startBlame("!. href(action=>"blame_data", -replay=>1) .qq!",\n!.
3605                       qq!           "!. href() .qq!");\n!.
3606                       qq!</script>\n!;
3607         } elsif (gitweb_check_feature('javascript-actions')) {
3608                 print qq!<script type="text/javascript">\n!.
3609                       qq!window.onload = fixLinks;\n!.
3610                       qq!</script>\n!;
3611         }
3612
3613         print "</body>\n" .
3614               "</html>";
3615 }
3616
3617 # die_error(<http_status_code>, <error_message>[, <detailed_html_description>])
3618 # Example: die_error(404, 'Hash not found')
3619 # By convention, use the following status codes (as defined in RFC 2616):
3620 # 400: Invalid or missing CGI parameters, or
3621 #      requested object exists but has wrong type.
3622 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3623 #      this server or project.
3624 # 404: Requested object/revision/project doesn't exist.
3625 # 500: The server isn't configured properly, or
3626 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3627 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3628 # 503: The server is currently unavailable (because it is overloaded,
3629 #      or down for maintenance).  Generally, this is a temporary state.
3630 sub die_error {
3631         my $status = shift || 500;
3632         my $error = esc_html(shift) || "Internal Server Error";
3633         my $extra = shift;
3634         my %opts = @_;
3635
3636         my %http_responses = (
3637                 400 => '400 Bad Request',
3638                 403 => '403 Forbidden',
3639                 404 => '404 Not Found',
3640                 500 => '500 Internal Server Error',
3641                 503 => '503 Service Unavailable',
3642         );
3643         git_header_html($http_responses{$status}, undef, %opts);
3644         print <<EOF;
3645 <div class="page_body">
3646 <br /><br />
3647 $status - $error
3648 <br />
3649 EOF
3650         if (defined $extra) {
3651                 print "<hr />\n" .
3652                       "$extra\n";
3653         }
3654         print "</div>\n";
3655
3656         git_footer_html();
3657         goto DONE_GITWEB
3658                 unless ($opts{'-error_handler'});
3659 }
3660
3661 ## ----------------------------------------------------------------------
3662 ## functions printing or outputting HTML: navigation
3663
3664 sub git_print_page_nav {
3665         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3666         $extra = '' if !defined $extra; # pager or formats
3667
3668         my @navs = qw(summary shortlog log commit commitdiff tree);
3669         if ($suppress) {
3670                 @navs = grep { $_ ne $suppress } @navs;
3671         }
3672
3673         my %arg = map { $_ => {action=>$_} } @navs;
3674         if (defined $head) {
3675                 for (qw(commit commitdiff)) {
3676                         $arg{$_}{'hash'} = $head;
3677                 }
3678                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3679                         for (qw(shortlog log)) {
3680                                 $arg{$_}{'hash'} = $head;
3681                         }
3682                 }
3683         }
3684
3685         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3686         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3687
3688         my @actions = gitweb_get_feature('actions');
3689         my %repl = (
3690                 '%' => '%',
3691                 'n' => $project,         # project name
3692                 'f' => $git_dir,         # project path within filesystem
3693                 'h' => $treehead || '',  # current hash ('h' parameter)
3694                 'b' => $treebase || '',  # hash base ('hb' parameter)
3695         );
3696         while (@actions) {
3697                 my ($label, $link, $pos) = splice(@actions,0,3);
3698                 # insert
3699                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3700                 # munch munch
3701                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3702                 $arg{$label}{'_href'} = $link;
3703         }
3704
3705         print "<div class=\"page_nav\">\n" .
3706                 (join " | ",
3707                  map { $_ eq $current ?
3708                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3709                  } @navs);
3710         print "<br/>\n$extra<br/>\n" .
3711               "</div>\n";
3712 }
3713
3714 sub format_paging_nav {
3715         my ($action, $page, $has_next_link) = @_;
3716         my $paging_nav;
3717
3718
3719         if ($page > 0) {
3720                 $paging_nav .=
3721                         $cgi->a({-href => href(-replay=>1, page=>undef)}, "first") .
3722                         " &sdot; " .
3723                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3724                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3725         } else {
3726                 $paging_nav .= "first &sdot; prev";
3727         }
3728
3729         if ($has_next_link) {
3730                 $paging_nav .= " &sdot; " .
3731                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3732                                  -accesskey => "n", -title => "Alt-n"}, "next");
3733         } else {
3734                 $paging_nav .= " &sdot; next";
3735         }
3736
3737         return $paging_nav;
3738 }
3739
3740 ## ......................................................................
3741 ## functions printing or outputting HTML: div
3742
3743 sub git_print_header_div {
3744         my ($action, $title, $hash, $hash_base) = @_;
3745         my %args = ();
3746
3747         $args{'action'} = $action;
3748         $args{'hash'} = $hash if $hash;
3749         $args{'hash_base'} = $hash_base if $hash_base;
3750
3751         print "<div class=\"header\">\n" .
3752               $cgi->a({-href => href(%args), -class => "title"},
3753               $title ? $title : $action) .
3754               "\n</div>\n";
3755 }
3756
3757 sub print_local_time {
3758         print format_local_time(@_);
3759 }
3760
3761 sub format_local_time {
3762         my $localtime = '';
3763         my %date = @_;
3764         if ($date{'hour_local'} < 6) {
3765                 $localtime .= sprintf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3766                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3767         } else {
3768                 $localtime .= sprintf(" (%02d:%02d %s)",
3769                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3770         }
3771
3772         return $localtime;
3773 }
3774
3775 # Outputs the author name and date in long form
3776 sub git_print_authorship {
3777         my $co = shift;
3778         my %opts = @_;
3779         my $tag = $opts{-tag} || 'div';
3780         my $author = $co->{'author_name'};
3781
3782         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3783         print "<$tag class=\"author_date\">" .
3784               format_search_author($author, "author", esc_html($author)) .
3785               " [$ad{'rfc2822'}";
3786         print_local_time(%ad) if ($opts{-localtime});
3787         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3788                   . "</$tag>\n";
3789 }
3790
3791 # Outputs table rows containing the full author or committer information,
3792 # in the format expected for 'commit' view (& similar).
3793 # Parameters are a commit hash reference, followed by the list of people
3794 # to output information for. If the list is empty it defaults to both
3795 # author and committer.
3796 sub git_print_authorship_rows {
3797         my $co = shift;
3798         # too bad we can't use @people = @_ || ('author', 'committer')
3799         my @people = @_;
3800         @people = ('author', 'committer') unless @people;
3801         foreach my $who (@people) {
3802                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3803                 print "<tr><td>$who</td><td>" .
3804                       format_search_author($co->{"${who}_name"}, $who,
3805                                esc_html($co->{"${who}_name"})) . " " .
3806                       format_search_author($co->{"${who}_email"}, $who,
3807                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3808                       "</td><td rowspan=\"2\">" .
3809                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3810                       "</td></tr>\n" .
3811                       "<tr>" .
3812                       "<td></td><td> $wd{'rfc2822'}";
3813                 print_local_time(%wd);
3814                 print "</td>" .
3815                       "</tr>\n";
3816         }
3817 }
3818
3819 sub git_print_page_path {
3820         my $name = shift;
3821         my $type = shift;
3822         my $hb = shift;
3823
3824
3825         print "<div class=\"page_path\">";
3826         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3827                       -title => 'tree root'}, to_utf8("[$project]"));
3828         print " / ";
3829         if (defined $name) {
3830                 my @dirname = split '/', $name;
3831                 my $basename = pop @dirname;
3832                 my $fullname = '';
3833
3834                 foreach my $dir (@dirname) {
3835                         $fullname .= ($fullname ? '/' : '') . $dir;
3836                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3837                                                      hash_base=>$hb),
3838                                       -title => $fullname}, esc_path($dir));
3839                         print " / ";
3840                 }
3841                 if (defined $type && $type eq 'blob') {
3842                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3843                                                      hash_base=>$hb),
3844                                       -title => $name}, esc_path($basename));
3845                 } elsif (defined $type && $type eq 'tree') {
3846                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3847                                                      hash_base=>$hb),
3848                                       -title => $name}, esc_path($basename));
3849                         print " / ";
3850                 } else {
3851                         print esc_path($basename);
3852                 }
3853         }
3854         print "<br/></div>\n";
3855 }
3856
3857 sub git_print_log {
3858         my $log = shift;
3859         my %opts = @_;
3860
3861         if ($opts{'-remove_title'}) {
3862                 # remove title, i.e. first line of log
3863                 shift @$log;
3864         }
3865         # remove leading empty lines
3866         while (defined $log->[0] && $log->[0] eq "") {
3867                 shift @$log;
3868         }
3869
3870         # print log
3871         my $signoff = 0;
3872         my $empty = 0;
3873         foreach my $line (@$log) {
3874                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3875                         $signoff = 1;
3876                         $empty = 0;
3877                         if (! $opts{'-remove_signoff'}) {
3878                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3879                                 next;
3880                         } else {
3881                                 # remove signoff lines
3882                                 next;
3883                         }
3884                 } else {
3885                         $signoff = 0;
3886                 }
3887
3888                 # print only one empty line
3889                 # do not print empty line after signoff
3890                 if ($line eq "") {
3891                         next if ($empty || $signoff);
3892                         $empty = 1;
3893                 } else {
3894                         $empty = 0;
3895                 }
3896
3897                 print format_log_line_html($line) . "<br/>\n";
3898         }
3899
3900         if ($opts{'-final_empty_line'}) {
3901                 # end with single empty line
3902                 print "<br/>\n" unless $empty;
3903         }
3904 }
3905
3906 # return link target (what link points to)
3907 sub git_get_link_target {
3908         my $hash = shift;
3909         my $link_target;
3910
3911         # read link
3912         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3913                 or return;
3914         {
3915                 local $/ = undef;
3916                 $link_target = <$fd>;
3917         }
3918         close $fd
3919                 or return;
3920
3921         return $link_target;
3922 }
3923
3924 # given link target, and the directory (basedir) the link is in,
3925 # return target of link relative to top directory (top tree);
3926 # return undef if it is not possible (including absolute links).
3927 sub normalize_link_target {
3928         my ($link_target, $basedir) = @_;
3929
3930         # absolute symlinks (beginning with '/') cannot be normalized
3931         return if (substr($link_target, 0, 1) eq '/');
3932
3933         # normalize link target to path from top (root) tree (dir)
3934         my $path;
3935         if ($basedir) {
3936                 $path = $basedir . '/' . $link_target;
3937         } else {
3938                 # we are in top (root) tree (dir)
3939                 $path = $link_target;
3940         }
3941
3942         # remove //, /./, and /../
3943         my @path_parts;
3944         foreach my $part (split('/', $path)) {
3945                 # discard '.' and ''
3946                 next if (!$part || $part eq '.');
3947                 # handle '..'
3948                 if ($part eq '..') {
3949                         if (@path_parts) {
3950                                 pop @path_parts;
3951                         } else {
3952                                 # link leads outside repository (outside top dir)
3953                                 return;
3954                         }
3955                 } else {
3956                         push @path_parts, $part;
3957                 }
3958         }
3959         $path = join('/', @path_parts);
3960
3961         return $path;
3962 }
3963
3964 # print tree entry (row of git_tree), but without encompassing <tr> element
3965 sub git_print_tree_entry {
3966         my ($t, $basedir, $hash_base, $have_blame) = @_;
3967
3968         my %base_key = ();
3969         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3970
3971         # The format of a table row is: mode list link.  Where mode is
3972         # the mode of the entry, list is the name of the entry, an href,
3973         # and link is the action links of the entry.
3974
3975         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3976         if (exists $t->{'size'}) {
3977                 print "<td class=\"size\">$t->{'size'}</td>\n";
3978         }
3979         if ($t->{'type'} eq "blob") {
3980                 print "<td class=\"list\">" .
3981                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3982                                                file_name=>"$basedir$t->{'name'}", %base_key),
3983                                 -class => "list"}, esc_path($t->{'name'}));
3984                 if (S_ISLNK(oct $t->{'mode'})) {
3985                         my $link_target = git_get_link_target($t->{'hash'});
3986                         if ($link_target) {
3987                                 my $norm_target = normalize_link_target($link_target, $basedir);
3988                                 if (defined $norm_target) {
3989                                         print " -> " .
3990                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3991                                                                      file_name=>$norm_target),
3992                                                        -title => $norm_target}, esc_path($link_target));
3993                                 } else {
3994                                         print " -> " . esc_path($link_target);
3995                                 }
3996                         }
3997                 }
3998                 print "</td>\n";
3999                 print "<td class=\"link\">";
4000                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
4001                                              file_name=>"$basedir$t->{'name'}", %base_key)},
4002                               "blob");
4003                 if ($have_blame) {
4004                         print " | " .
4005                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
4006                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
4007                                       "blame");
4008                 }
4009                 if (defined $hash_base) {
4010                         print " | " .
4011                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4012                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
4013                                       "history");
4014                 }
4015                 print " | " .
4016                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
4017                                                file_name=>"$basedir$t->{'name'}")},
4018                                 "raw");
4019                 print "</td>\n";
4020
4021         } elsif ($t->{'type'} eq "tree") {
4022                 print "<td class=\"list\">";
4023                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4024                                              file_name=>"$basedir$t->{'name'}",
4025                                              %base_key)},
4026                               esc_path($t->{'name'}));
4027                 print "</td>\n";
4028                 print "<td class=\"link\">";
4029                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
4030                                              file_name=>"$basedir$t->{'name'}",
4031                                              %base_key)},
4032                               "tree");
4033                 if (defined $hash_base) {
4034                         print " | " .
4035                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
4036                                                      file_name=>"$basedir$t->{'name'}")},
4037                                       "history");
4038                 }
4039                 print "</td>\n";
4040         } else {
4041                 # unknown object: we can only present history for it
4042                 # (this includes 'commit' object, i.e. submodule support)
4043                 print "<td class=\"list\">" .
4044                       esc_path($t->{'name'}) .
4045                       "</td>\n";
4046                 print "<td class=\"link\">";
4047                 if (defined $hash_base) {
4048                         print $cgi->a({-href => href(action=>"history",
4049                                                      hash_base=>$hash_base,
4050                                                      file_name=>"$basedir$t->{'name'}")},
4051                                       "history");
4052                 }
4053                 print "</td>\n";
4054         }
4055 }
4056
4057 ## ......................................................................
4058 ## functions printing large fragments of HTML
4059
4060 # get pre-image filenames for merge (combined) diff
4061 sub fill_from_file_info {
4062         my ($diff, @parents) = @_;
4063
4064         $diff->{'from_file'} = [ ];
4065         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
4066         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4067                 if ($diff->{'status'}[$i] eq 'R' ||
4068                     $diff->{'status'}[$i] eq 'C') {
4069                         $diff->{'from_file'}[$i] =
4070                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
4071                 }
4072         }
4073
4074         return $diff;
4075 }
4076
4077 # is current raw difftree line of file deletion
4078 sub is_deleted {
4079         my $diffinfo = shift;
4080
4081         return $diffinfo->{'to_id'} eq ('0' x 40);
4082 }
4083
4084 # does patch correspond to [previous] difftree raw line
4085 # $diffinfo  - hashref of parsed raw diff format
4086 # $patchinfo - hashref of parsed patch diff format
4087 #              (the same keys as in $diffinfo)
4088 sub is_patch_split {
4089         my ($diffinfo, $patchinfo) = @_;
4090
4091         return defined $diffinfo && defined $patchinfo
4092                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
4093 }
4094
4095
4096 sub git_difftree_body {
4097         my ($difftree, $hash, @parents) = @_;
4098         my ($parent) = $parents[0];
4099         my $have_blame = gitweb_check_feature('blame');
4100         print "<div class=\"list_head\">\n";
4101         if ($#{$difftree} > 10) {
4102                 print(($#{$difftree} + 1) . " files changed:\n");
4103         }
4104         print "</div>\n";
4105
4106         print "<table class=\"" .
4107               (@parents > 1 ? "combined " : "") .
4108               "diff_tree\">\n";
4109
4110         # header only for combined diff in 'commitdiff' view
4111         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
4112         if ($has_header) {
4113                 # table header
4114                 print "<thead><tr>\n" .
4115                        "<th></th><th></th>\n"; # filename, patchN link
4116                 for (my $i = 0; $i < @parents; $i++) {
4117                         my $par = $parents[$i];
4118                         print "<th>" .
4119                               $cgi->a({-href => href(action=>"commitdiff",
4120                                                      hash=>$hash, hash_parent=>$par),
4121                                        -title => 'commitdiff to parent number ' .
4122                                                   ($i+1) . ': ' . substr($par,0,7)},
4123                                       $i+1) .
4124                               "&nbsp;</th>\n";
4125                 }
4126                 print "</tr></thead>\n<tbody>\n";
4127         }
4128
4129         my $alternate = 1;
4130         my $patchno = 0;
4131         foreach my $line (@{$difftree}) {
4132                 my $diff = parsed_difftree_line($line);
4133
4134                 if ($alternate) {
4135                         print "<tr class=\"dark\">\n";
4136                 } else {
4137                         print "<tr class=\"light\">\n";
4138                 }
4139                 $alternate ^= 1;
4140
4141                 if (exists $diff->{'nparents'}) { # combined diff
4142
4143                         fill_from_file_info($diff, @parents)
4144                                 unless exists $diff->{'from_file'};
4145
4146                         if (!is_deleted($diff)) {
4147                                 # file exists in the result (child) commit
4148                                 print "<td>" .
4149                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4150                                                              file_name=>$diff->{'to_file'},
4151                                                              hash_base=>$hash),
4152                                               -class => "list"}, esc_path($diff->{'to_file'})) .
4153                                       "</td>\n";
4154                         } else {
4155                                 print "<td>" .
4156                                       esc_path($diff->{'to_file'}) .
4157                                       "</td>\n";
4158                         }
4159
4160                         if ($action eq 'commitdiff') {
4161                                 # link to patch
4162                                 $patchno++;
4163                                 print "<td class=\"link\">" .
4164                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
4165                                       " | " .
4166                                       "</td>\n";
4167                         }
4168
4169                         my $has_history = 0;
4170                         my $not_deleted = 0;
4171                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
4172                                 my $hash_parent = $parents[$i];
4173                                 my $from_hash = $diff->{'from_id'}[$i];
4174                                 my $from_path = $diff->{'from_file'}[$i];
4175                                 my $status = $diff->{'status'}[$i];
4176
4177                                 $has_history ||= ($status ne 'A');
4178                                 $not_deleted ||= ($status ne 'D');
4179
4180                                 if ($status eq 'A') {
4181                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
4182                                 } elsif ($status eq 'D') {
4183                                         print "<td class=\"link\">" .
4184                                               $cgi->a({-href => href(action=>"blob",
4185                                                                      hash_base=>$hash,
4186                                                                      hash=>$from_hash,
4187                                                                      file_name=>$from_path)},
4188                                                       "blob" . ($i+1)) .
4189                                               " | </td>\n";
4190                                 } else {
4191                                         if ($diff->{'to_id'} eq $from_hash) {
4192                                                 print "<td class=\"link nochange\">";
4193                                         } else {
4194                                                 print "<td class=\"link\">";
4195                                         }
4196                                         print $cgi->a({-href => href(action=>"blobdiff",
4197                                                                      hash=>$diff->{'to_id'},
4198                                                                      hash_parent=>$from_hash,
4199                                                                      hash_base=>$hash,
4200                                                                      hash_parent_base=>$hash_parent,
4201                                                                      file_name=>$diff->{'to_file'},
4202                                                                      file_parent=>$from_path)},
4203                                                       "diff" . ($i+1)) .
4204                                               " | </td>\n";
4205                                 }
4206                         }
4207
4208                         print "<td class=\"link\">";
4209                         if ($not_deleted) {
4210                                 print $cgi->a({-href => href(action=>"blob",
4211                                                              hash=>$diff->{'to_id'},
4212                                                              file_name=>$diff->{'to_file'},
4213                                                              hash_base=>$hash)},
4214                                               "blob");
4215                                 print " | " if ($has_history);
4216                         }
4217                         if ($has_history) {
4218                                 print $cgi->a({-href => href(action=>"history",
4219                                                              file_name=>$diff->{'to_file'},
4220                                                              hash_base=>$hash)},
4221                                               "history");
4222                         }
4223                         print "</td>\n";
4224
4225                         print "</tr>\n";
4226                         next; # instead of 'else' clause, to avoid extra indent
4227                 }
4228                 # else ordinary diff
4229
4230                 my ($to_mode_oct, $to_mode_str, $to_file_type);
4231                 my ($from_mode_oct, $from_mode_str, $from_file_type);
4232                 if ($diff->{'to_mode'} ne ('0' x 6)) {
4233                         $to_mode_oct = oct $diff->{'to_mode'};
4234                         if (S_ISREG($to_mode_oct)) { # only for regular file
4235                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
4236                         }
4237                         $to_file_type = file_type($diff->{'to_mode'});
4238                 }
4239                 if ($diff->{'from_mode'} ne ('0' x 6)) {
4240                         $from_mode_oct = oct $diff->{'from_mode'};
4241                         if (S_ISREG($to_mode_oct)) { # only for regular file
4242                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
4243                         }
4244                         $from_file_type = file_type($diff->{'from_mode'});
4245                 }
4246
4247                 if ($diff->{'status'} eq "A") { # created
4248                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
4249                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
4250                         $mode_chng   .= "]</span>";
4251                         print "<td>";
4252                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4253                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4254                                       -class => "list"}, esc_path($diff->{'file'}));
4255                         print "</td>\n";
4256                         print "<td>$mode_chng</td>\n";
4257                         print "<td class=\"link\">";
4258                         if ($action eq 'commitdiff') {
4259                                 # link to patch
4260                                 $patchno++;
4261                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4262                                 print " | ";
4263                         }
4264                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4265                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4266                                       "blob");
4267                         print "</td>\n";
4268
4269                 } elsif ($diff->{'status'} eq "D") { # deleted
4270                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
4271                         print "<td>";
4272                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4273                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
4274                                        -class => "list"}, esc_path($diff->{'file'}));
4275                         print "</td>\n";
4276                         print "<td>$mode_chng</td>\n";
4277                         print "<td class=\"link\">";
4278                         if ($action eq 'commitdiff') {
4279                                 # link to patch
4280                                 $patchno++;
4281                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
4282                                 print " | ";
4283                         }
4284                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
4285                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
4286                                       "blob") . " | ";
4287                         if ($have_blame) {
4288                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
4289                                                              file_name=>$diff->{'file'})},
4290                                               "blame") . " | ";
4291                         }
4292                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
4293                                                      file_name=>$diff->{'file'})},
4294                                       "history");
4295                         print "</td>\n";
4296
4297                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
4298                         my $mode_chnge = "";
4299                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4300                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
4301                                 if ($from_file_type ne $to_file_type) {
4302                                         $mode_chnge .= " from $from_file_type to $to_file_type";
4303                                 }
4304                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
4305                                         if ($from_mode_str && $to_mode_str) {
4306                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
4307                                         } elsif ($to_mode_str) {
4308                                                 $mode_chnge .= " mode: $to_mode_str";
4309                                         }
4310                                 }
4311                                 $mode_chnge .= "]</span>\n";
4312                         }
4313                         print "<td>";
4314                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4315                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4316                                       -class => "list"}, esc_path($diff->{'file'}));
4317                         print "</td>\n";
4318                         print "<td>$mode_chnge</td>\n";
4319                         print "<td class=\"link\">";
4320                         if ($action eq 'commitdiff') {
4321                                 # link to patch
4322                                 $patchno++;
4323                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4324                                       " | ";
4325                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4326                                 # "commit" view and modified file (not onlu mode changed)
4327                                 print $cgi->a({-href => href(action=>"blobdiff",
4328                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4329                                                              hash_base=>$hash, hash_parent_base=>$parent,
4330                                                              file_name=>$diff->{'file'})},
4331                                               "diff") .
4332                                       " | ";
4333                         }
4334                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4335                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4336                                        "blob") . " | ";
4337                         if ($have_blame) {
4338                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4339                                                              file_name=>$diff->{'file'})},
4340                                               "blame") . " | ";
4341                         }
4342                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4343                                                      file_name=>$diff->{'file'})},
4344                                       "history");
4345                         print "</td>\n";
4346
4347                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4348                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4349                         my $nstatus = $status_name{$diff->{'status'}};
4350                         my $mode_chng = "";
4351                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4352                                 # mode also for directories, so we cannot use $to_mode_str
4353                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4354                         }
4355                         print "<td>" .
4356                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4357                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4358                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4359                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4360                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4361                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4362                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4363                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4364                               "<td class=\"link\">";
4365                         if ($action eq 'commitdiff') {
4366                                 # link to patch
4367                                 $patchno++;
4368                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4369                                       " | ";
4370                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4371                                 # "commit" view and modified file (not only pure rename or copy)
4372                                 print $cgi->a({-href => href(action=>"blobdiff",
4373                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4374                                                              hash_base=>$hash, hash_parent_base=>$parent,
4375                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4376                                               "diff") .
4377                                       " | ";
4378                         }
4379                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4380                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4381                                       "blob") . " | ";
4382                         if ($have_blame) {
4383                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4384                                                              file_name=>$diff->{'to_file'})},
4385                                               "blame") . " | ";
4386                         }
4387                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4388                                                     file_name=>$diff->{'to_file'})},
4389                                       "history");
4390                         print "</td>\n";
4391
4392                 } # we should not encounter Unmerged (U) or Unknown (X) status
4393                 print "</tr>\n";
4394         }
4395         print "</tbody>" if $has_header;
4396         print "</table>\n";
4397 }
4398
4399 sub git_patchset_body {
4400         my ($fd, $difftree, $hash, @hash_parents) = @_;
4401         my ($hash_parent) = $hash_parents[0];
4402
4403         my $is_combined = (@hash_parents > 1);
4404         my $patch_idx = 0;
4405         my $patch_number = 0;
4406         my $patch_line;
4407         my $diffinfo;
4408         my $to_name;
4409         my (%from, %to);
4410
4411         print "<div class=\"patchset\">\n";
4412
4413         # skip to first patch
4414         while ($patch_line = <$fd>) {
4415                 chomp $patch_line;
4416
4417                 last if ($patch_line =~ m/^diff /);
4418         }
4419
4420  PATCH:
4421         while ($patch_line) {
4422
4423                 # parse "git diff" header line
4424                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4425                         # $1 is from_name, which we do not use
4426                         $to_name = unquote($2);
4427                         $to_name =~ s!^b/!!;
4428                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4429                         # $1 is 'cc' or 'combined', which we do not use
4430                         $to_name = unquote($2);
4431                 } else {
4432                         $to_name = undef;
4433                 }
4434
4435                 # check if current patch belong to current raw line
4436                 # and parse raw git-diff line if needed
4437                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4438                         # this is continuation of a split patch
4439                         print "<div class=\"patch cont\">\n";
4440                 } else {
4441                         # advance raw git-diff output if needed
4442                         $patch_idx++ if defined $diffinfo;
4443
4444                         # read and prepare patch information
4445                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4446
4447                         # compact combined diff output can have some patches skipped
4448                         # find which patch (using pathname of result) we are at now;
4449                         if ($is_combined) {
4450                                 while ($to_name ne $diffinfo->{'to_file'}) {
4451                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4452                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4453                                               "</div>\n";  # class="patch"
4454
4455                                         $patch_idx++;
4456                                         $patch_number++;
4457
4458                                         last if $patch_idx > $#$difftree;
4459                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4460                                 }
4461                         }
4462
4463                         # modifies %from, %to hashes
4464                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4465
4466                         # this is first patch for raw difftree line with $patch_idx index
4467                         # we index @$difftree array from 0, but number patches from 1
4468                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4469                 }
4470
4471                 # git diff header
4472                 #assert($patch_line =~ m/^diff /) if DEBUG;
4473                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4474                 $patch_number++;
4475                 # print "git diff" header
4476                 print format_git_diff_header_line($patch_line, $diffinfo,
4477                                                   \%from, \%to);
4478
4479                 # print extended diff header
4480                 print "<div class=\"diff extended_header\">\n";
4481         EXTENDED_HEADER:
4482                 while ($patch_line = <$fd>) {
4483                         chomp $patch_line;
4484
4485                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4486
4487                         print format_extended_diff_header_line($patch_line, $diffinfo,
4488                                                                \%from, \%to);
4489                 }
4490                 print "</div>\n"; # class="diff extended_header"
4491
4492                 # from-file/to-file diff header
4493                 if (! $patch_line) {
4494                         print "</div>\n"; # class="patch"
4495                         last PATCH;
4496                 }
4497                 next PATCH if ($patch_line =~ m/^diff /);
4498                 #assert($patch_line =~ m/^---/) if DEBUG;
4499
4500                 my $last_patch_line = $patch_line;
4501                 $patch_line = <$fd>;
4502                 chomp $patch_line;
4503                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4504
4505                 print format_diff_from_to_header($last_patch_line, $patch_line,
4506                                                  $diffinfo, \%from, \%to,
4507                                                  @hash_parents);
4508
4509                 # the patch itself
4510         LINE:
4511                 while ($patch_line = <$fd>) {
4512                         chomp $patch_line;
4513
4514                         next PATCH if ($patch_line =~ m/^diff /);
4515
4516                         print format_diff_line($patch_line, \%from, \%to);
4517                 }
4518
4519         } continue {
4520                 print "</div>\n"; # class="patch"
4521         }
4522
4523         # for compact combined (--cc) format, with chunk and patch simplification
4524         # the patchset might be empty, but there might be unprocessed raw lines
4525         for (++$patch_idx if $patch_number > 0;
4526              $patch_idx < @$difftree;
4527              ++$patch_idx) {
4528                 # read and prepare patch information
4529                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4530
4531                 # generate anchor for "patch" links in difftree / whatchanged part
4532                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4533                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4534                       "</div>\n";  # class="patch"
4535
4536                 $patch_number++;
4537         }
4538
4539         if ($patch_number == 0) {
4540                 if (@hash_parents > 1) {
4541                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4542                 } else {
4543                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4544                 }
4545         }
4546
4547         print "</div>\n"; # class="patchset"
4548 }
4549
4550 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4551
4552 # fills project list info (age, description, owner, forks) for each
4553 # project in the list, removing invalid projects from returned list
4554 # NOTE: modifies $projlist, but does not remove entries from it
4555 sub fill_project_list_info {
4556         my ($projlist, $check_forks) = @_;
4557         my @projects;
4558
4559         my $show_ctags = gitweb_check_feature('ctags');
4560  PROJECT:
4561         foreach my $pr (@$projlist) {
4562                 my (@activity) = git_get_last_activity($pr->{'path'});
4563                 unless (@activity) {
4564                         next PROJECT;
4565                 }
4566                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4567                 if (!defined $pr->{'descr'}) {
4568                         my $descr = git_get_project_description($pr->{'path'}) || "";
4569                         $descr = to_utf8($descr);
4570                         $pr->{'descr_long'} = $descr;
4571                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4572                 }
4573                 if (!defined $pr->{'owner'}) {
4574                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4575                 }
4576                 if ($check_forks) {
4577                         my $pname = $pr->{'path'};
4578                         if (($pname =~ s/\.git$//) &&
4579                             ($pname !~ /\/$/) &&
4580                             (-d "$projectroot/$pname")) {
4581                                 $pr->{'forks'} = "-d $projectroot/$pname";
4582                         } else {
4583                                 $pr->{'forks'} = 0;
4584                         }
4585                 }
4586                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4587                 push @projects, $pr;
4588         }
4589
4590         return @projects;
4591 }
4592
4593 # print 'sort by' <th> element, generating 'sort by $name' replay link
4594 # if that order is not selected
4595 sub print_sort_th {
4596         print format_sort_th(@_);
4597 }
4598
4599 sub format_sort_th {
4600         my ($name, $order, $header) = @_;
4601         my $sort_th = "";
4602         $header ||= ucfirst($name);
4603
4604         if ($order eq $name) {
4605                 $sort_th .= "<th>$header</th>\n";
4606         } else {
4607                 $sort_th .= "<th>" .
4608                             $cgi->a({-href => href(-replay=>1, order=>$name),
4609                                      -class => "header"}, $header) .
4610                             "</th>\n";
4611         }
4612
4613         return $sort_th;
4614 }
4615
4616 sub git_project_list_body {
4617         # actually uses global variable $project
4618         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4619
4620         my $check_forks = gitweb_check_feature('forks');
4621         my @projects = fill_project_list_info($projlist, $check_forks);
4622
4623         $order ||= $default_projects_order;
4624         $from = 0 unless defined $from;
4625         $to = $#projects if (!defined $to || $#projects < $to);
4626
4627         my %order_info = (
4628                 project => { key => 'path', type => 'str' },
4629                 descr => { key => 'descr_long', type => 'str' },
4630                 owner => { key => 'owner', type => 'str' },
4631                 age => { key => 'age', type => 'num' }
4632         );
4633         my $oi = $order_info{$order};
4634         if ($oi->{'type'} eq 'str') {
4635                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4636         } else {
4637                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4638         }
4639
4640         my $show_ctags = gitweb_check_feature('ctags');
4641         if ($show_ctags) {
4642                 my %ctags;
4643                 foreach my $p (@projects) {
4644                         foreach my $ct (keys %{$p->{'ctags'}}) {
4645                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4646                         }
4647                 }
4648                 my $cloud = git_populate_project_tagcloud(\%ctags);
4649                 print git_show_project_tagcloud($cloud, 64);
4650         }
4651
4652         print "<table class=\"project_list\">\n";
4653         unless ($no_header) {
4654                 print "<tr>\n";
4655                 if ($check_forks) {
4656                         print "<th></th>\n";
4657                 }
4658                 print_sort_th('project', $order, 'Project');
4659                 print_sort_th('descr', $order, 'Description');
4660                 print_sort_th('owner', $order, 'Owner');
4661                 print_sort_th('age', $order, 'Last Change');
4662                 print "<th></th>\n" . # for links
4663                       "</tr>\n";
4664         }
4665         my $alternate = 1;
4666         my $tagfilter = $cgi->param('by_tag');
4667         for (my $i = $from; $i <= $to; $i++) {
4668                 my $pr = $projects[$i];
4669
4670                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4671                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4672                         and not $pr->{'descr_long'} =~ /$searchtext/;
4673                 # Weed out forks or non-matching entries of search
4674                 if ($check_forks) {
4675                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4676                         $forkbase="^$forkbase" if $forkbase;
4677                         next if not $searchtext and not $tagfilter and $show_ctags
4678                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4679                 }
4680
4681                 if ($alternate) {
4682                         print "<tr class=\"dark\">\n";
4683                 } else {
4684                         print "<tr class=\"light\">\n";
4685                 }
4686                 $alternate ^= 1;
4687                 if ($check_forks) {
4688                         print "<td>";
4689                         if ($pr->{'forks'}) {
4690                                 print "<!-- $pr->{'forks'} -->\n";
4691                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4692                         }
4693                         print "</td>\n";
4694                 }
4695                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4696                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4697                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4698                                         -class => "list", -title => $pr->{'descr_long'}},
4699                                         esc_html($pr->{'descr'})) . "</td>\n" .
4700                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4701                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4702                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4703                       "<td class=\"link\">" .
4704                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4705                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4706                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4707                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4708                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4709                       "</td>\n" .
4710                       "</tr>\n";
4711         }
4712         if (defined $extra) {
4713                 print "<tr>\n";
4714                 if ($check_forks) {
4715                         print "<td></td>\n";
4716                 }
4717                 print "<td colspan=\"5\">$extra</td>\n" .
4718                       "</tr>\n";
4719         }
4720         print "</table>\n";
4721 }
4722
4723 sub git_log_body {
4724         # uses global variable $project
4725         my ($commitlist, $from, $to, $refs, $extra) = @_;
4726
4727         $from = 0 unless defined $from;
4728         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4729
4730         for (my $i = 0; $i <= $to; $i++) {
4731                 my %co = %{$commitlist->[$i]};
4732                 next if !%co;
4733                 my $commit = $co{'id'};
4734                 my $ref = format_ref_marker($refs, $commit);
4735                 my %ad = parse_date($co{'author_epoch'});
4736                 git_print_header_div('commit',
4737                                "<span class=\"age\">$co{'age_string'}</span>" .
4738                                esc_html($co{'title'}) . $ref,
4739                                $commit);
4740                 print "<div class=\"title_text\">\n" .
4741                       "<div class=\"log_link\">\n" .
4742                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
4743                       " | " .
4744                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
4745                       " | " .
4746                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
4747                       "<br/>\n" .
4748                       "</div>\n";
4749                       git_print_authorship(\%co, -tag => 'span');
4750                       print "<br/>\n</div>\n";
4751
4752                 print "<div class=\"log_body\">\n";
4753                 git_print_log($co{'comment'}, -final_empty_line=> 1);
4754                 print "</div>\n";
4755         }
4756         if ($extra) {
4757                 print "<div class=\"page_nav\">\n";
4758                 print "$extra\n";
4759                 print "</div>\n";
4760         }
4761 }
4762
4763 sub git_shortlog_body {
4764         # uses global variable $project
4765         my ($commitlist, $from, $to, $refs, $extra) = @_;
4766
4767         $from = 0 unless defined $from;
4768         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4769
4770         print "<table class=\"shortlog\">\n";
4771         my $alternate = 1;
4772         for (my $i = $from; $i <= $to; $i++) {
4773                 my %co = %{$commitlist->[$i]};
4774                 my $commit = $co{'id'};
4775                 my $ref = format_ref_marker($refs, $commit);
4776                 if ($alternate) {
4777                         print "<tr class=\"dark\">\n";
4778                 } else {
4779                         print "<tr class=\"light\">\n";
4780                 }
4781                 $alternate ^= 1;
4782                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4783                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4784                       format_author_html('td', \%co, 10) . "<td>";
4785                 print format_subject_html($co{'title'}, $co{'title_short'},
4786                                           href(action=>"commit", hash=>$commit), $ref);
4787                 print "</td>\n" .
4788                       "<td class=\"link\">" .
4789                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4790                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4791                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4792                 my $snapshot_links = format_snapshot_links($commit);
4793                 if (defined $snapshot_links) {
4794                         print " | " . $snapshot_links;
4795                 }
4796                 print "</td>\n" .
4797                       "</tr>\n";
4798         }
4799         if (defined $extra) {
4800                 print "<tr>\n" .
4801                       "<td colspan=\"4\">$extra</td>\n" .
4802                       "</tr>\n";
4803         }
4804         print "</table>\n";
4805 }
4806
4807 sub git_history_body {
4808         # Warning: assumes constant type (blob or tree) during history
4809         my ($commitlist, $from, $to, $refs, $extra,
4810             $file_name, $file_hash, $ftype) = @_;
4811
4812         $from = 0 unless defined $from;
4813         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4814
4815         print "<table class=\"history\">\n";
4816         my $alternate = 1;
4817         for (my $i = $from; $i <= $to; $i++) {
4818                 my %co = %{$commitlist->[$i]};
4819                 if (!%co) {
4820                         next;
4821                 }
4822                 my $commit = $co{'id'};
4823
4824                 my $ref = format_ref_marker($refs, $commit);
4825
4826                 if ($alternate) {
4827                         print "<tr class=\"dark\">\n";
4828                 } else {
4829                         print "<tr class=\"light\">\n";
4830                 }
4831                 $alternate ^= 1;
4832                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4833         # shortlog:   format_author_html('td', \%co, 10)
4834                       format_author_html('td', \%co, 15, 3) . "<td>";
4835                 # originally git_history used chop_str($co{'title'}, 50)
4836                 print format_subject_html($co{'title'}, $co{'title_short'},
4837                                           href(action=>"commit", hash=>$commit), $ref);
4838                 print "</td>\n" .
4839                       "<td class=\"link\">" .
4840                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4841                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4842
4843                 if ($ftype eq 'blob') {
4844                         my $blob_current = $file_hash;
4845                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4846                         if (defined $blob_current && defined $blob_parent &&
4847                                         $blob_current ne $blob_parent) {
4848                                 print " | " .
4849                                         $cgi->a({-href => href(action=>"blobdiff",
4850                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4851                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4852                                                                file_name=>$file_name)},
4853                                                 "diff to current");
4854                         }
4855                 }
4856                 print "</td>\n" .
4857                       "</tr>\n";
4858         }
4859         if (defined $extra) {
4860                 print "<tr>\n" .
4861                       "<td colspan=\"4\">$extra</td>\n" .
4862                       "</tr>\n";
4863         }
4864         print "</table>\n";
4865 }
4866
4867 sub git_tags_body {
4868         # uses global variable $project
4869         my ($taglist, $from, $to, $extra) = @_;
4870         $from = 0 unless defined $from;
4871         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4872
4873         print "<table class=\"tags\">\n";
4874         my $alternate = 1;
4875         for (my $i = $from; $i <= $to; $i++) {
4876                 my $entry = $taglist->[$i];
4877                 my %tag = %$entry;
4878                 my $comment = $tag{'subject'};
4879                 my $comment_short;
4880                 if (defined $comment) {
4881                         $comment_short = chop_str($comment, 30, 5);
4882                 }
4883                 if ($alternate) {
4884                         print "<tr class=\"dark\">\n";
4885                 } else {
4886                         print "<tr class=\"light\">\n";
4887                 }
4888                 $alternate ^= 1;
4889                 if (defined $tag{'age'}) {
4890                         print "<td><i>$tag{'age'}</i></td>\n";
4891                 } else {
4892                         print "<td></td>\n";
4893                 }
4894                 print "<td>" .
4895                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4896                                -class => "list name"}, esc_html($tag{'name'})) .
4897                       "</td>\n" .
4898                       "<td>";
4899                 if (defined $comment) {
4900                         print format_subject_html($comment, $comment_short,
4901                                                   href(action=>"tag", hash=>$tag{'id'}));
4902                 }
4903                 print "</td>\n" .
4904                       "<td class=\"selflink\">";
4905                 if ($tag{'type'} eq "tag") {
4906                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4907                 } else {
4908                         print "&nbsp;";
4909                 }
4910                 print "</td>\n" .
4911                       "<td class=\"link\">" . " | " .
4912                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4913                 if ($tag{'reftype'} eq "commit") {
4914                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4915                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4916                 } elsif ($tag{'reftype'} eq "blob") {
4917                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4918                 }
4919                 print "</td>\n" .
4920                       "</tr>";
4921         }
4922         if (defined $extra) {
4923                 print "<tr>\n" .
4924                       "<td colspan=\"5\">$extra</td>\n" .
4925                       "</tr>\n";
4926         }
4927         print "</table>\n";
4928 }
4929
4930 sub git_heads_body {
4931         # uses global variable $project
4932         my ($headlist, $head, $from, $to, $extra) = @_;
4933         $from = 0 unless defined $from;
4934         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4935
4936         print "<table class=\"heads\">\n";
4937         my $alternate = 1;
4938         for (my $i = $from; $i <= $to; $i++) {
4939                 my $entry = $headlist->[$i];
4940                 my %ref = %$entry;
4941                 my $curr = $ref{'id'} eq $head;
4942                 if ($alternate) {
4943                         print "<tr class=\"dark\">\n";
4944                 } else {
4945                         print "<tr class=\"light\">\n";
4946                 }
4947                 $alternate ^= 1;
4948                 print "<td><i>$ref{'age'}</i></td>\n" .
4949                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4950                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4951                                -class => "list name"},esc_html($ref{'name'})) .
4952                       "</td>\n" .
4953                       "<td class=\"link\">" .
4954                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4955                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4956                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4957                       "</td>\n" .
4958                       "</tr>";
4959         }
4960         if (defined $extra) {
4961                 print "<tr>\n" .
4962                       "<td colspan=\"3\">$extra</td>\n" .
4963                       "</tr>\n";
4964         }
4965         print "</table>\n";
4966 }
4967
4968 sub git_search_grep_body {
4969         my ($commitlist, $from, $to, $extra) = @_;
4970         $from = 0 unless defined $from;
4971         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4972
4973         print "<table class=\"commit_search\">\n";
4974         my $alternate = 1;
4975         for (my $i = $from; $i <= $to; $i++) {
4976                 my %co = %{$commitlist->[$i]};
4977                 if (!%co) {
4978                         next;
4979                 }
4980                 my $commit = $co{'id'};
4981                 if ($alternate) {
4982                         print "<tr class=\"dark\">\n";
4983                 } else {
4984                         print "<tr class=\"light\">\n";
4985                 }
4986                 $alternate ^= 1;
4987                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4988                       format_author_html('td', \%co, 15, 5) .
4989                       "<td>" .
4990                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4991                                -class => "list subject"},
4992                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4993                 my $comment = $co{'comment'};
4994                 foreach my $line (@$comment) {
4995                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4996                                 my ($lead, $match, $trail) = ($1, $2, $3);
4997                                 $match = chop_str($match, 70, 5, 'center');
4998                                 my $contextlen = int((80 - length($match))/2);
4999                                 $contextlen = 30 if ($contextlen > 30);
5000                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
5001                                 $trail = chop_str($trail, $contextlen, 10, 'right');
5002
5003                                 $lead  = esc_html($lead);
5004                                 $match = esc_html($match);
5005                                 $trail = esc_html($trail);
5006
5007                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
5008                         }
5009                 }
5010                 print "</td>\n" .
5011                       "<td class=\"link\">" .
5012                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5013                       " | " .
5014                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
5015                       " | " .
5016                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5017                 print "</td>\n" .
5018                       "</tr>\n";
5019         }
5020         if (defined $extra) {
5021                 print "<tr>\n" .
5022                       "<td colspan=\"3\">$extra</td>\n" .
5023                       "</tr>\n";
5024         }
5025         print "</table>\n";
5026 }
5027
5028 ## ======================================================================
5029 ## ======================================================================
5030 ## actions
5031
5032 sub git_project_list {
5033         my $order = $input_params{'order'};
5034         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5035                 die_error(400, "Unknown order parameter");
5036         }
5037
5038         my @list = git_get_projects_list();
5039         if (!@list) {
5040                 die_error(404, "No projects found");
5041         }
5042
5043         git_header_html();
5044         if (defined $home_text && -f $home_text) {
5045                 print "<div class=\"index_include\">\n";
5046                 insert_file($home_text);
5047                 print "</div>\n";
5048         }
5049         print $cgi->startform(-method => "get") .
5050               "<p class=\"projsearch\">Search:\n" .
5051               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
5052               "</p>" .
5053               $cgi->end_form() . "\n";
5054         git_project_list_body(\@list, $order);
5055         git_footer_html();
5056 }
5057
5058 sub git_forks {
5059         my $order = $input_params{'order'};
5060         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
5061                 die_error(400, "Unknown order parameter");
5062         }
5063
5064         my @list = git_get_projects_list($project);
5065         if (!@list) {
5066                 die_error(404, "No forks found");
5067         }
5068
5069         git_header_html();
5070         git_print_page_nav('','');
5071         git_print_header_div('summary', "$project forks");
5072         git_project_list_body(\@list, $order);
5073         git_footer_html();
5074 }
5075
5076 sub git_project_index {
5077         my @projects = git_get_projects_list($project);
5078
5079         print $cgi->header(
5080                 -type => 'text/plain',
5081                 -charset => 'utf-8',
5082                 -content_disposition => 'inline; filename="index.aux"');
5083
5084         foreach my $pr (@projects) {
5085                 if (!exists $pr->{'owner'}) {
5086                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
5087                 }
5088
5089                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
5090                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
5091                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5092                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
5093                 $path  =~ s/ /\+/g;
5094                 $owner =~ s/ /\+/g;
5095
5096                 print "$path $owner\n";
5097         }
5098 }
5099
5100 sub git_summary {
5101         my $descr = git_get_project_description($project) || "none";
5102         my %co = parse_commit("HEAD");
5103         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
5104         my $head = $co{'id'};
5105
5106         my $owner = git_get_project_owner($project);
5107
5108         my $refs = git_get_references();
5109         # These get_*_list functions return one more to allow us to see if
5110         # there are more ...
5111         my @taglist  = git_get_tags_list(16);
5112         my @headlist = git_get_heads_list(16);
5113         my @forklist;
5114         my $check_forks = gitweb_check_feature('forks');
5115
5116         if ($check_forks) {
5117                 @forklist = git_get_projects_list($project);
5118         }
5119
5120         git_header_html();
5121         git_print_page_nav('summary','', $head);
5122
5123         print "<div class=\"title\">&nbsp;</div>\n";
5124         print "<table class=\"projects_list\">\n" .
5125               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
5126               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
5127         if (defined $cd{'rfc2822'}) {
5128                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
5129         }
5130
5131         # use per project git URL list in $projectroot/$project/cloneurl
5132         # or make project git URL from git base URL and project name
5133         my $url_tag = "URL";
5134         my @url_list = git_get_project_url_list($project);
5135         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
5136         foreach my $git_url (@url_list) {
5137                 next unless $git_url;
5138                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
5139                 $url_tag = "";
5140         }
5141
5142         # Tag cloud
5143         my $show_ctags = gitweb_check_feature('ctags');
5144         if ($show_ctags) {
5145                 my $ctags = git_get_project_ctags($project);
5146                 my $cloud = git_populate_project_tagcloud($ctags);
5147                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
5148                 print "</td>\n<td>" unless %$ctags;
5149                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
5150                 print "</td>\n<td>" if %$ctags;
5151                 print git_show_project_tagcloud($cloud, 48);
5152                 print "</td></tr>";
5153         }
5154
5155         print "</table>\n";
5156
5157         # If XSS prevention is on, we don't include README.html.
5158         # TODO: Allow a readme in some safe format.
5159         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
5160                 print "<div class=\"title\">readme</div>\n" .
5161                       "<div class=\"readme\">\n";
5162                 insert_file("$projectroot/$project/README.html");
5163                 print "\n</div>\n"; # class="readme"
5164         }
5165
5166         # we need to request one more than 16 (0..15) to check if
5167         # those 16 are all
5168         my @commitlist = $head ? parse_commits($head, 17) : ();
5169         if (@commitlist) {
5170                 git_print_header_div('shortlog');
5171                 git_shortlog_body(\@commitlist, 0, 15, $refs,
5172                                   $#commitlist <=  15 ? undef :
5173                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
5174         }
5175
5176         if (@taglist) {
5177                 git_print_header_div('tags');
5178                 git_tags_body(\@taglist, 0, 15,
5179                               $#taglist <=  15 ? undef :
5180                               $cgi->a({-href => href(action=>"tags")}, "..."));
5181         }
5182
5183         if (@headlist) {
5184                 git_print_header_div('heads');
5185                 git_heads_body(\@headlist, $head, 0, 15,
5186                                $#headlist <= 15 ? undef :
5187                                $cgi->a({-href => href(action=>"heads")}, "..."));
5188         }
5189
5190         if (@forklist) {
5191                 git_print_header_div('forks');
5192                 git_project_list_body(\@forklist, 'age', 0, 15,
5193                                       $#forklist <= 15 ? undef :
5194                                       $cgi->a({-href => href(action=>"forks")}, "..."),
5195                                       'no_header');
5196         }
5197
5198         git_footer_html();
5199 }
5200
5201 sub git_tag {
5202         my $head = git_get_head_hash($project);
5203         git_header_html();
5204         git_print_page_nav('','', $head,undef,$head);
5205         my %tag = parse_tag($hash);
5206
5207         if (! %tag) {
5208                 die_error(404, "Unknown tag object");
5209         }
5210
5211         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
5212         print "<div class=\"title_text\">\n" .
5213               "<table class=\"object_header\">\n" .
5214               "<tr>\n" .
5215               "<td>object</td>\n" .
5216               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5217                                $tag{'object'}) . "</td>\n" .
5218               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
5219                                               $tag{'type'}) . "</td>\n" .
5220               "</tr>\n";
5221         if (defined($tag{'author'})) {
5222                 git_print_authorship_rows(\%tag, 'author');
5223         }
5224         print "</table>\n\n" .
5225               "</div>\n";
5226         print "<div class=\"page_body\">";
5227         my $comment = $tag{'comment'};
5228         foreach my $line (@$comment) {
5229                 chomp $line;
5230                 print esc_html($line, -nbsp=>1) . "<br/>\n";
5231         }
5232         print "</div>\n";
5233         git_footer_html();
5234 }
5235
5236 sub git_blame_common {
5237         my $format = shift || 'porcelain';
5238         if ($format eq 'porcelain' && $cgi->param('js')) {
5239                 $format = 'incremental';
5240                 $action = 'blame_incremental'; # for page title etc
5241         }
5242
5243         # permissions
5244         gitweb_check_feature('blame')
5245                 or die_error(403, "Blame view not allowed");
5246
5247         # error checking
5248         die_error(400, "No file name given") unless $file_name;
5249         $hash_base ||= git_get_head_hash($project);
5250         die_error(404, "Couldn't find base commit") unless $hash_base;
5251         my %co = parse_commit($hash_base)
5252                 or die_error(404, "Commit not found");
5253         my $ftype = "blob";
5254         if (!defined $hash) {
5255                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
5256                         or die_error(404, "Error looking up file");
5257         } else {
5258                 $ftype = git_get_type($hash);
5259                 if ($ftype !~ "blob") {
5260                         die_error(400, "Object is not a blob");
5261                 }
5262         }
5263
5264         my $fd;
5265         if ($format eq 'incremental') {
5266                 # get file contents (as base)
5267                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
5268                         or die_error(500, "Open git-cat-file failed");
5269         } elsif ($format eq 'data') {
5270                 # run git-blame --incremental
5271                 open $fd, "-|", git_cmd(), "blame", "--incremental",
5272                         $hash_base, "--", $file_name
5273                         or die_error(500, "Open git-blame --incremental failed");
5274         } else {
5275                 # run git-blame --porcelain
5276                 open $fd, "-|", git_cmd(), "blame", '-p',
5277                         $hash_base, '--', $file_name
5278                         or die_error(500, "Open git-blame --porcelain failed");
5279         }
5280
5281         # incremental blame data returns early
5282         if ($format eq 'data') {
5283                 print $cgi->header(
5284                         -type=>"text/plain", -charset => "utf-8",
5285                         -status=> "200 OK");
5286                 local $| = 1; # output autoflush
5287                 print while <$fd>;
5288                 close $fd
5289                         or print "ERROR $!\n";
5290
5291                 print 'END';
5292                 if (defined $t0 && gitweb_check_feature('timed')) {
5293                         print ' '.
5294                               Time::HiRes::tv_interval($t0, [Time::HiRes::gettimeofday()]).
5295                               ' '.$number_of_git_cmds;
5296                 }
5297                 print "\n";
5298
5299                 return;
5300         }
5301
5302         # page header
5303         git_header_html();
5304         my $formats_nav =
5305                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
5306                         "blob") .
5307                 " | ";
5308         if ($format eq 'incremental') {
5309                 $formats_nav .=
5310                         $cgi->a({-href => href(action=>"blame", javascript=>0, -replay=>1)},
5311                                 "blame") . " (non-incremental)";
5312         } else {
5313                 $formats_nav .=
5314                         $cgi->a({-href => href(action=>"blame_incremental", -replay=>1)},
5315                                 "blame") . " (incremental)";
5316         }
5317         $formats_nav .=
5318                 " | " .
5319                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5320                         "history") .
5321                 " | " .
5322                 $cgi->a({-href => href(action=>$action, file_name=>$file_name)},
5323                         "HEAD");
5324         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5325         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5326         git_print_page_path($file_name, $ftype, $hash_base);
5327
5328         # page body
5329         if ($format eq 'incremental') {
5330                 print "<noscript>\n<div class=\"error\"><center><b>\n".
5331                       "This page requires JavaScript to run.\n Use ".
5332                       $cgi->a({-href => href(action=>'blame',javascript=>0,-replay=>1)},
5333                               'this page').
5334                       " instead.\n".
5335                       "</b></center></div>\n</noscript>\n";
5336
5337                 print qq!<div id="progress_bar" style="width: 100%; background-color: yellow"></div>\n!;
5338         }
5339
5340         print qq!<div class="page_body">\n!;
5341         print qq!<div id="progress_info">... / ...</div>\n!
5342                 if ($format eq 'incremental');
5343         print qq!<table id="blame_table" class="blame" width="100%">\n!.
5344               #qq!<col width="5.5em" /><col width="2.5em" /><col width="*" />\n!.
5345               qq!<thead>\n!.
5346               qq!<tr><th>Commit</th><th>Line</th><th>Data</th></tr>\n!.
5347               qq!</thead>\n!.
5348               qq!<tbody>\n!;
5349
5350         my @rev_color = qw(light dark);
5351         my $num_colors = scalar(@rev_color);
5352         my $current_color = 0;
5353
5354         if ($format eq 'incremental') {
5355                 my $color_class = $rev_color[$current_color];
5356
5357                 #contents of a file
5358                 my $linenr = 0;
5359         LINE:
5360                 while (my $line = <$fd>) {
5361                         chomp $line;
5362                         $linenr++;
5363
5364                         print qq!<tr id="l$linenr" class="$color_class">!.
5365                               qq!<td class="sha1"><a href=""> </a></td>!.
5366                               qq!<td class="linenr">!.
5367                               qq!<a class="linenr" href="">$linenr</a></td>!;
5368                         print qq!<td class="pre">! . esc_html($line) . "</td>\n";
5369                         print qq!</tr>\n!;
5370                 }
5371
5372         } else { # porcelain, i.e. ordinary blame
5373                 my %metainfo = (); # saves information about commits
5374
5375                 # blame data
5376         LINE:
5377                 while (my $line = <$fd>) {
5378                         chomp $line;
5379                         # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
5380                         # no <lines in group> for subsequent lines in group of lines
5381                         my ($full_rev, $orig_lineno, $lineno, $group_size) =
5382                            ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5383                         if (!exists $metainfo{$full_rev}) {
5384                                 $metainfo{$full_rev} = { 'nprevious' => 0 };
5385                         }
5386                         my $meta = $metainfo{$full_rev};
5387                         my $data;
5388                         while ($data = <$fd>) {
5389                                 chomp $data;
5390                                 last if ($data =~ s/^\t//); # contents of line
5391                                 if ($data =~ /^(\S+)(?: (.*))?$/) {
5392                                         $meta->{$1} = $2 unless exists $meta->{$1};
5393                                 }
5394                                 if ($data =~ /^previous /) {
5395                                         $meta->{'nprevious'}++;
5396                                 }
5397                         }
5398                         my $short_rev = substr($full_rev, 0, 8);
5399                         my $author = $meta->{'author'};
5400                         my %date =
5401                                 parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5402                         my $date = $date{'iso-tz'};
5403                         if ($group_size) {
5404                                 $current_color = ($current_color + 1) % $num_colors;
5405                         }
5406                         my $tr_class = $rev_color[$current_color];
5407                         $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5408                         $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5409                         $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5410                         print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5411                         if ($group_size) {
5412                                 print "<td class=\"sha1\"";
5413                                 print " title=\"". esc_html($author) . ", $date\"";
5414                                 print " rowspan=\"$group_size\"" if ($group_size > 1);
5415                                 print ">";
5416                                 print $cgi->a({-href => href(action=>"commit",
5417                                                              hash=>$full_rev,
5418                                                              file_name=>$file_name)},
5419                                               esc_html($short_rev));
5420                                 if ($group_size >= 2) {
5421                                         my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5422                                         if (@author_initials) {
5423                                                 print "<br />" .
5424                                                       esc_html(join('', @author_initials));
5425                                                 #           or join('.', ...)
5426                                         }
5427                                 }
5428                                 print "</td>\n";
5429                         }
5430                         # 'previous' <sha1 of parent commit> <filename at commit>
5431                         if (exists $meta->{'previous'} &&
5432                             $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5433                                 $meta->{'parent'} = $1;
5434                                 $meta->{'file_parent'} = unquote($2);
5435                         }
5436                         my $linenr_commit =
5437                                 exists($meta->{'parent'}) ?
5438                                 $meta->{'parent'} : $full_rev;
5439                         my $linenr_filename =
5440                                 exists($meta->{'file_parent'}) ?
5441                                 $meta->{'file_parent'} : unquote($meta->{'filename'});
5442                         my $blamed = href(action => 'blame',
5443                                           file_name => $linenr_filename,
5444                                           hash_base => $linenr_commit);
5445                         print "<td class=\"linenr\">";
5446                         print $cgi->a({ -href => "$blamed#l$orig_lineno",
5447                                         -class => "linenr" },
5448                                       esc_html($lineno));
5449                         print "</td>";
5450                         print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5451                         print "</tr>\n";
5452                 } # end while
5453
5454         }
5455
5456         # footer
5457         print "</tbody>\n".
5458               "</table>\n"; # class="blame"
5459         print "</div>\n";   # class="blame_body"
5460         close $fd
5461                 or print "Reading blob failed\n";
5462
5463         git_footer_html();
5464 }
5465
5466 sub git_blame {
5467         git_blame_common();
5468 }
5469
5470 sub git_blame_incremental {
5471         git_blame_common('incremental');
5472 }
5473
5474 sub git_blame_data {
5475         git_blame_common('data');
5476 }
5477
5478 sub git_tags {
5479         my $head = git_get_head_hash($project);
5480         git_header_html();
5481         git_print_page_nav('','', $head,undef,$head);
5482         git_print_header_div('summary', $project);
5483
5484         my @tagslist = git_get_tags_list();
5485         if (@tagslist) {
5486                 git_tags_body(\@tagslist);
5487         }
5488         git_footer_html();
5489 }
5490
5491 sub git_heads {
5492         my $head = git_get_head_hash($project);
5493         git_header_html();
5494         git_print_page_nav('','', $head,undef,$head);
5495         git_print_header_div('summary', $project);
5496
5497         my @headslist = git_get_heads_list();
5498         if (@headslist) {
5499                 git_heads_body(\@headslist, $head);
5500         }
5501         git_footer_html();
5502 }
5503
5504 sub git_blob_plain {
5505         my $type = shift;
5506         my $expires;
5507
5508         if (!defined $hash) {
5509                 if (defined $file_name) {
5510                         my $base = $hash_base || git_get_head_hash($project);
5511                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5512                                 or die_error(404, "Cannot find file");
5513                 } else {
5514                         die_error(400, "No file name defined");
5515                 }
5516         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5517                 # blobs defined by non-textual hash id's can be cached
5518                 $expires = "+1d";
5519         }
5520
5521         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5522                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5523
5524         # content-type (can include charset)
5525         $type = blob_contenttype($fd, $file_name, $type);
5526
5527         # "save as" filename, even when no $file_name is given
5528         my $save_as = "$hash";
5529         if (defined $file_name) {
5530                 $save_as = $file_name;
5531         } elsif ($type =~ m/^text\//) {
5532                 $save_as .= '.txt';
5533         }
5534
5535         # With XSS prevention on, blobs of all types except a few known safe
5536         # ones are served with "Content-Disposition: attachment" to make sure
5537         # they don't run in our security domain.  For certain image types,
5538         # blob view writes an <img> tag referring to blob_plain view, and we
5539         # want to be sure not to break that by serving the image as an
5540         # attachment (though Firefox 3 doesn't seem to care).
5541         my $sandbox = $prevent_xss &&
5542                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5543
5544         print $cgi->header(
5545                 -type => $type,
5546                 -expires => $expires,
5547                 -content_disposition =>
5548                         ($sandbox ? 'attachment' : 'inline')
5549                         . '; filename="' . $save_as . '"');
5550         local $/ = undef;
5551         binmode STDOUT, ':raw';
5552         print <$fd>;
5553         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5554         close $fd;
5555 }
5556
5557 sub git_blob {
5558         my $expires;
5559
5560         if (!defined $hash) {
5561                 if (defined $file_name) {
5562                         my $base = $hash_base || git_get_head_hash($project);
5563                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5564                                 or die_error(404, "Cannot find file");
5565                 } else {
5566                         die_error(400, "No file name defined");
5567                 }
5568         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5569                 # blobs defined by non-textual hash id's can be cached
5570                 $expires = "+1d";
5571         }
5572
5573         my $have_blame = gitweb_check_feature('blame');
5574         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5575                 or die_error(500, "Couldn't cat $file_name, $hash");
5576         my $mimetype = blob_mimetype($fd, $file_name);
5577         # use 'blob_plain' (aka 'raw') view for files that cannot be displayed
5578         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5579                 close $fd;
5580                 return git_blob_plain($mimetype);
5581         }
5582         # we can have blame only for text/* mimetype
5583         $have_blame &&= ($mimetype =~ m!^text/!);
5584
5585         my $highlight = gitweb_check_feature('highlight');
5586         my $syntax = guess_file_syntax($highlight, $mimetype, $file_name);
5587         $fd = run_highlighter($fd, $highlight, $syntax)
5588                 if $syntax;
5589
5590         git_header_html(undef, $expires);
5591         my $formats_nav = '';
5592         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5593                 if (defined $file_name) {
5594                         if ($have_blame) {
5595                                 $formats_nav .=
5596                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5597                                                 "blame") .
5598                                         " | ";
5599                         }
5600                         $formats_nav .=
5601                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5602                                         "history") .
5603                                 " | " .
5604                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5605                                         "raw") .
5606                                 " | " .
5607                                 $cgi->a({-href => href(action=>"blob",
5608                                                        hash_base=>"HEAD", file_name=>$file_name)},
5609                                         "HEAD");
5610                 } else {
5611                         $formats_nav .=
5612                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5613                                         "raw");
5614                 }
5615                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5616                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5617         } else {
5618                 print "<div class=\"page_nav\">\n" .
5619                       "<br/><br/></div>\n" .
5620                       "<div class=\"title\">".esc_html($hash)."</div>\n";
5621         }
5622         git_print_page_path($file_name, "blob", $hash_base);
5623         print "<div class=\"page_body\">\n";
5624         if ($mimetype =~ m!^image/!) {
5625                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
5626                 if ($file_name) {
5627                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
5628                 }
5629                 print qq! src="! .
5630                       href(action=>"blob_plain", hash=>$hash,
5631                            hash_base=>$hash_base, file_name=>$file_name) .
5632                       qq!" />\n!;
5633         } else {
5634                 my $nr;
5635                 while (my $line = <$fd>) {
5636                         chomp $line;
5637                         $nr++;
5638                         $line = untabify($line);
5639                         printf qq!<div class="pre"><a id="l%i" href="%s#l%i" class="linenr">%4i</a> %s</div>\n!,
5640                                $nr, esc_attr(href(-replay => 1)), $nr, $nr, $syntax ? $line : esc_html($line, -nbsp=>1);
5641                 }
5642         }
5643         close $fd
5644                 or print "Reading blob failed.\n";
5645         print "</div>";
5646         git_footer_html();
5647 }
5648
5649 sub git_tree {
5650         if (!defined $hash_base) {
5651                 $hash_base = "HEAD";
5652         }
5653         if (!defined $hash) {
5654                 if (defined $file_name) {
5655                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5656                 } else {
5657                         $hash = $hash_base;
5658                 }
5659         }
5660         die_error(404, "No such tree") unless defined($hash);
5661
5662         my $show_sizes = gitweb_check_feature('show-sizes');
5663         my $have_blame = gitweb_check_feature('blame');
5664
5665         my @entries = ();
5666         {
5667                 local $/ = "\0";
5668                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5669                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5670                         or die_error(500, "Open git-ls-tree failed");
5671                 @entries = map { chomp; $_ } <$fd>;
5672                 close $fd
5673                         or die_error(404, "Reading tree failed");
5674         }
5675
5676         my $refs = git_get_references();
5677         my $ref = format_ref_marker($refs, $hash_base);
5678         git_header_html();
5679         my $basedir = '';
5680         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5681                 my @views_nav = ();
5682                 if (defined $file_name) {
5683                         push @views_nav,
5684                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5685                                         "history"),
5686                                 $cgi->a({-href => href(action=>"tree",
5687                                                        hash_base=>"HEAD", file_name=>$file_name)},
5688                                         "HEAD"),
5689                 }
5690                 my $snapshot_links = format_snapshot_links($hash);
5691                 if (defined $snapshot_links) {
5692                         # FIXME: Should be available when we have no hash base as well.
5693                         push @views_nav, $snapshot_links;
5694                 }
5695                 git_print_page_nav('tree','', $hash_base, undef, undef,
5696                                    join(' | ', @views_nav));
5697                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5698         } else {
5699                 undef $hash_base;
5700                 print "<div class=\"page_nav\">\n";
5701                 print "<br/><br/></div>\n";
5702                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
5703         }
5704         if (defined $file_name) {
5705                 $basedir = $file_name;
5706                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5707                         $basedir .= '/';
5708                 }
5709                 git_print_page_path($file_name, 'tree', $hash_base);
5710         }
5711         print "<div class=\"page_body\">\n";
5712         print "<table class=\"tree\">\n";
5713         my $alternate = 1;
5714         # '..' (top directory) link if possible
5715         if (defined $hash_base &&
5716             defined $file_name && $file_name =~ m![^/]+$!) {
5717                 if ($alternate) {
5718                         print "<tr class=\"dark\">\n";
5719                 } else {
5720                         print "<tr class=\"light\">\n";
5721                 }
5722                 $alternate ^= 1;
5723
5724                 my $up = $file_name;
5725                 $up =~ s!/?[^/]+$!!;
5726                 undef $up unless $up;
5727                 # based on git_print_tree_entry
5728                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5729                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5730                 print '<td class="list">';
5731                 print $cgi->a({-href => href(action=>"tree",
5732                                              hash_base=>$hash_base,
5733                                              file_name=>$up)},
5734                               "..");
5735                 print "</td>\n";
5736                 print "<td class=\"link\"></td>\n";
5737
5738                 print "</tr>\n";
5739         }
5740         foreach my $line (@entries) {
5741                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5742
5743                 if ($alternate) {
5744                         print "<tr class=\"dark\">\n";
5745                 } else {
5746                         print "<tr class=\"light\">\n";
5747                 }
5748                 $alternate ^= 1;
5749
5750                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5751
5752                 print "</tr>\n";
5753         }
5754         print "</table>\n" .
5755               "</div>";
5756         git_footer_html();
5757 }
5758
5759 sub snapshot_name {
5760         my ($project, $hash) = @_;
5761
5762         # path/to/project.git  -> project
5763         # path/to/project/.git -> project
5764         my $name = to_utf8($project);
5765         $name =~ s,([^/])/*\.git$,$1,;
5766         $name = basename($name);
5767         # sanitize name
5768         $name =~ s/[[:cntrl:]]/?/g;
5769
5770         my $ver = $hash;
5771         if ($hash =~ /^[0-9a-fA-F]+$/) {
5772                 # shorten SHA-1 hash
5773                 my $full_hash = git_get_full_hash($project, $hash);
5774                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
5775                         $ver = git_get_short_hash($project, $hash);
5776                 }
5777         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
5778                 # tags don't need shortened SHA-1 hash
5779                 $ver = $1;
5780         } else {
5781                 # branches and other need shortened SHA-1 hash
5782                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
5783                         $ver = $1;
5784                 }
5785                 $ver .= '-' . git_get_short_hash($project, $hash);
5786         }
5787         # in case of hierarchical branch names
5788         $ver =~ s!/!.!g;
5789
5790         # name = project-version_string
5791         $name = "$name-$ver";
5792
5793         return wantarray ? ($name, $name) : $name;
5794 }
5795
5796 sub git_snapshot {
5797         my $format = $input_params{'snapshot_format'};
5798         if (!@snapshot_fmts) {
5799                 die_error(403, "Snapshots not allowed");
5800         }
5801         # default to first supported snapshot format
5802         $format ||= $snapshot_fmts[0];
5803         if ($format !~ m/^[a-z0-9]+$/) {
5804                 die_error(400, "Invalid snapshot format parameter");
5805         } elsif (!exists($known_snapshot_formats{$format})) {
5806                 die_error(400, "Unknown snapshot format");
5807         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5808                 die_error(403, "Snapshot format not allowed");
5809         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5810                 die_error(403, "Unsupported snapshot format");
5811         }
5812
5813         my $type = git_get_type("$hash^{}");
5814         if (!$type) {
5815                 die_error(404, 'Object does not exist');
5816         }  elsif ($type eq 'blob') {
5817                 die_error(400, 'Object is not a tree-ish');
5818         }
5819
5820         my ($name, $prefix) = snapshot_name($project, $hash);
5821         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
5822         my $cmd = quote_command(
5823                 git_cmd(), 'archive',
5824                 "--format=$known_snapshot_formats{$format}{'format'}",
5825                 "--prefix=$prefix/", $hash);
5826         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5827                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5828         }
5829
5830         $filename =~ s/(["\\])/\\$1/g;
5831         print $cgi->header(
5832                 -type => $known_snapshot_formats{$format}{'type'},
5833                 -content_disposition => 'inline; filename="' . $filename . '"',
5834                 -status => '200 OK');
5835
5836         open my $fd, "-|", $cmd
5837                 or die_error(500, "Execute git-archive failed");
5838         binmode STDOUT, ':raw';
5839         print <$fd>;
5840         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5841         close $fd;
5842 }
5843
5844 sub git_log_generic {
5845         my ($fmt_name, $body_subr, $base, $parent, $file_name, $file_hash) = @_;
5846
5847         my $head = git_get_head_hash($project);
5848         if (!defined $base) {
5849                 $base = $head;
5850         }
5851         if (!defined $page) {
5852                 $page = 0;
5853         }
5854         my $refs = git_get_references();
5855
5856         my $commit_hash = $base;
5857         if (defined $parent) {
5858                 $commit_hash = "$parent..$base";
5859         }
5860         my @commitlist =
5861                 parse_commits($commit_hash, 101, (100 * $page),
5862                               defined $file_name ? ($file_name, "--full-history") : ());
5863
5864         my $ftype;
5865         if (!defined $file_hash && defined $file_name) {
5866                 # some commits could have deleted file in question,
5867                 # and not have it in tree, but one of them has to have it
5868                 for (my $i = 0; $i < @commitlist; $i++) {
5869                         $file_hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5870                         last if defined $file_hash;
5871                 }
5872         }
5873         if (defined $file_hash) {
5874                 $ftype = git_get_type($file_hash);
5875         }
5876         if (defined $file_name && !defined $ftype) {
5877                 die_error(500, "Unknown type of object");
5878         }
5879         my %co;
5880         if (defined $file_name) {
5881                 %co = parse_commit($base)
5882                         or die_error(404, "Unknown commit object");
5883         }
5884
5885
5886         my $paging_nav = format_paging_nav($fmt_name, $page, $#commitlist >= 100);
5887         my $next_link = '';
5888         if ($#commitlist >= 100) {
5889                 $next_link =
5890                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5891                                  -accesskey => "n", -title => "Alt-n"}, "next");
5892         }
5893         my $patch_max = gitweb_get_feature('patches');
5894         if ($patch_max && !defined $file_name) {
5895                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5896                         $paging_nav .= " &sdot; " .
5897                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5898                                         "patches");
5899                 }
5900         }
5901
5902         git_header_html();
5903         git_print_page_nav($fmt_name,'', $hash,$hash,$hash, $paging_nav);
5904         if (defined $file_name) {
5905                 git_print_header_div('commit', esc_html($co{'title'}), $base);
5906         } else {
5907                 git_print_header_div('summary', $project)
5908         }
5909         git_print_page_path($file_name, $ftype, $hash_base)
5910                 if (defined $file_name);
5911
5912         $body_subr->(\@commitlist, 0, 99, $refs, $next_link,
5913                      $file_name, $file_hash, $ftype);
5914
5915         git_footer_html();
5916 }
5917
5918 sub git_log {
5919         git_log_generic('log', \&git_log_body,
5920                         $hash, $hash_parent);
5921 }
5922
5923 sub git_commit {
5924         $hash ||= $hash_base || "HEAD";
5925         my %co = parse_commit($hash)
5926             or die_error(404, "Unknown commit object");
5927
5928         my $parent  = $co{'parent'};
5929         my $parents = $co{'parents'}; # listref
5930
5931         # we need to prepare $formats_nav before any parameter munging
5932         my $formats_nav;
5933         if (!defined $parent) {
5934                 # --root commitdiff
5935                 $formats_nav .= '(initial)';
5936         } elsif (@$parents == 1) {
5937                 # single parent commit
5938                 $formats_nav .=
5939                         '(parent: ' .
5940                         $cgi->a({-href => href(action=>"commit",
5941                                                hash=>$parent)},
5942                                 esc_html(substr($parent, 0, 7))) .
5943                         ')';
5944         } else {
5945                 # merge commit
5946                 $formats_nav .=
5947                         '(merge: ' .
5948                         join(' ', map {
5949                                 $cgi->a({-href => href(action=>"commit",
5950                                                        hash=>$_)},
5951                                         esc_html(substr($_, 0, 7)));
5952                         } @$parents ) .
5953                         ')';
5954         }
5955         if (gitweb_check_feature('patches') && @$parents <= 1) {
5956                 $formats_nav .= " | " .
5957                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5958                                 "patch");
5959         }
5960
5961         if (!defined $parent) {
5962                 $parent = "--root";
5963         }
5964         my @difftree;
5965         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5966                 @diff_opts,
5967                 (@$parents <= 1 ? $parent : '-c'),
5968                 $hash, "--"
5969                 or die_error(500, "Open git-diff-tree failed");
5970         @difftree = map { chomp; $_ } <$fd>;
5971         close $fd or die_error(404, "Reading git-diff-tree failed");
5972
5973         # non-textual hash id's can be cached
5974         my $expires;
5975         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5976                 $expires = "+1d";
5977         }
5978         my $refs = git_get_references();
5979         my $ref = format_ref_marker($refs, $co{'id'});
5980
5981         git_header_html(undef, $expires);
5982         git_print_page_nav('commit', '',
5983                            $hash, $co{'tree'}, $hash,
5984                            $formats_nav);
5985
5986         if (defined $co{'parent'}) {
5987                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5988         } else {
5989                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5990         }
5991         print "<div class=\"title_text\">\n" .
5992               "<table class=\"object_header\">\n";
5993         git_print_authorship_rows(\%co);
5994         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5995         print "<tr>" .
5996               "<td>tree</td>" .
5997               "<td class=\"sha1\">" .
5998               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5999                        class => "list"}, $co{'tree'}) .
6000               "</td>" .
6001               "<td class=\"link\">" .
6002               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
6003                       "tree");
6004         my $snapshot_links = format_snapshot_links($hash);
6005         if (defined $snapshot_links) {
6006                 print " | " . $snapshot_links;
6007         }
6008         print "</td>" .
6009               "</tr>\n";
6010
6011         foreach my $par (@$parents) {
6012                 print "<tr>" .
6013                       "<td>parent</td>" .
6014                       "<td class=\"sha1\">" .
6015                       $cgi->a({-href => href(action=>"commit", hash=>$par),
6016                                class => "list"}, $par) .
6017                       "</td>" .
6018                       "<td class=\"link\">" .
6019                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
6020                       " | " .
6021                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
6022                       "</td>" .
6023                       "</tr>\n";
6024         }
6025         print "</table>".
6026               "</div>\n";
6027
6028         print "<div class=\"page_body\">\n";
6029         git_print_log($co{'comment'});
6030         print "</div>\n";
6031
6032         git_difftree_body(\@difftree, $hash, @$parents);
6033
6034         git_footer_html();
6035 }
6036
6037 sub git_object {
6038         # object is defined by:
6039         # - hash or hash_base alone
6040         # - hash_base and file_name
6041         my $type;
6042
6043         # - hash or hash_base alone
6044         if ($hash || ($hash_base && !defined $file_name)) {
6045                 my $object_id = $hash || $hash_base;
6046
6047                 open my $fd, "-|", quote_command(
6048                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
6049                         or die_error(404, "Object does not exist");
6050                 $type = <$fd>;
6051                 chomp $type;
6052                 close $fd
6053                         or die_error(404, "Object does not exist");
6054
6055         # - hash_base and file_name
6056         } elsif ($hash_base && defined $file_name) {
6057                 $file_name =~ s,/+$,,;
6058
6059                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
6060                         or die_error(404, "Base object does not exist");
6061
6062                 # here errors should not hapen
6063                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
6064                         or die_error(500, "Open git-ls-tree failed");
6065                 my $line = <$fd>;
6066                 close $fd;
6067
6068                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
6069                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
6070                         die_error(404, "File or directory for given base does not exist");
6071                 }
6072                 $type = $2;
6073                 $hash = $3;
6074         } else {
6075                 die_error(400, "Not enough information to find object");
6076         }
6077
6078         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
6079                                           hash=>$hash, hash_base=>$hash_base,
6080                                           file_name=>$file_name),
6081                              -status => '302 Found');
6082 }
6083
6084 sub git_blobdiff {
6085         my $format = shift || 'html';
6086
6087         my $fd;
6088         my @difftree;
6089         my %diffinfo;
6090         my $expires;
6091
6092         # preparing $fd and %diffinfo for git_patchset_body
6093         # new style URI
6094         if (defined $hash_base && defined $hash_parent_base) {
6095                 if (defined $file_name) {
6096                         # read raw output
6097                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6098                                 $hash_parent_base, $hash_base,
6099                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
6100                                 or die_error(500, "Open git-diff-tree failed");
6101                         @difftree = map { chomp; $_ } <$fd>;
6102                         close $fd
6103                                 or die_error(404, "Reading git-diff-tree failed");
6104                         @difftree
6105                                 or die_error(404, "Blob diff not found");
6106
6107                 } elsif (defined $hash &&
6108                          $hash =~ /[0-9a-fA-F]{40}/) {
6109                         # try to find filename from $hash
6110
6111                         # read filtered raw output
6112                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6113                                 $hash_parent_base, $hash_base, "--"
6114                                 or die_error(500, "Open git-diff-tree failed");
6115                         @difftree =
6116                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
6117                                 # $hash == to_id
6118                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
6119                                 map { chomp; $_ } <$fd>;
6120                         close $fd
6121                                 or die_error(404, "Reading git-diff-tree failed");
6122                         @difftree
6123                                 or die_error(404, "Blob diff not found");
6124
6125                 } else {
6126                         die_error(400, "Missing one of the blob diff parameters");
6127                 }
6128
6129                 if (@difftree > 1) {
6130                         die_error(400, "Ambiguous blob diff specification");
6131                 }
6132
6133                 %diffinfo = parse_difftree_raw_line($difftree[0]);
6134                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
6135                 $file_name   ||= $diffinfo{'to_file'};
6136
6137                 $hash_parent ||= $diffinfo{'from_id'};
6138                 $hash        ||= $diffinfo{'to_id'};
6139
6140                 # non-textual hash id's can be cached
6141                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
6142                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
6143                         $expires = '+1d';
6144                 }
6145
6146                 # open patch output
6147                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6148                         '-p', ($format eq 'html' ? "--full-index" : ()),
6149                         $hash_parent_base, $hash_base,
6150                         "--", (defined $file_parent ? $file_parent : ()), $file_name
6151                         or die_error(500, "Open git-diff-tree failed");
6152         }
6153
6154         # old/legacy style URI -- not generated anymore since 1.4.3.
6155         if (!%diffinfo) {
6156                 die_error('404 Not Found', "Missing one of the blob diff parameters")
6157         }
6158
6159         # header
6160         if ($format eq 'html') {
6161                 my $formats_nav =
6162                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
6163                                 "raw");
6164                 git_header_html(undef, $expires);
6165                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
6166                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
6167                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6168                 } else {
6169                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
6170                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
6171                 }
6172                 if (defined $file_name) {
6173                         git_print_page_path($file_name, "blob", $hash_base);
6174                 } else {
6175                         print "<div class=\"page_path\"></div>\n";
6176                 }
6177
6178         } elsif ($format eq 'plain') {
6179                 print $cgi->header(
6180                         -type => 'text/plain',
6181                         -charset => 'utf-8',
6182                         -expires => $expires,
6183                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
6184
6185                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6186
6187         } else {
6188                 die_error(400, "Unknown blobdiff format");
6189         }
6190
6191         # patch
6192         if ($format eq 'html') {
6193                 print "<div class=\"page_body\">\n";
6194
6195                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
6196                 close $fd;
6197
6198                 print "</div>\n"; # class="page_body"
6199                 git_footer_html();
6200
6201         } else {
6202                 while (my $line = <$fd>) {
6203                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
6204                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
6205
6206                         print $line;
6207
6208                         last if $line =~ m!^\+\+\+!;
6209                 }
6210                 local $/ = undef;
6211                 print <$fd>;
6212                 close $fd;
6213         }
6214 }
6215
6216 sub git_blobdiff_plain {
6217         git_blobdiff('plain');
6218 }
6219
6220 sub git_commitdiff {
6221         my %params = @_;
6222         my $format = $params{-format} || 'html';
6223
6224         my ($patch_max) = gitweb_get_feature('patches');
6225         if ($format eq 'patch') {
6226                 die_error(403, "Patch view not allowed") unless $patch_max;
6227         }
6228
6229         $hash ||= $hash_base || "HEAD";
6230         my %co = parse_commit($hash)
6231             or die_error(404, "Unknown commit object");
6232
6233         # choose format for commitdiff for merge
6234         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
6235                 $hash_parent = '--cc';
6236         }
6237         # we need to prepare $formats_nav before almost any parameter munging
6238         my $formats_nav;
6239         if ($format eq 'html') {
6240                 $formats_nav =
6241                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
6242                                 "raw");
6243                 if ($patch_max && @{$co{'parents'}} <= 1) {
6244                         $formats_nav .= " | " .
6245                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
6246                                         "patch");
6247                 }
6248
6249                 if (defined $hash_parent &&
6250                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
6251                         # commitdiff with two commits given
6252                         my $hash_parent_short = $hash_parent;
6253                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
6254                                 $hash_parent_short = substr($hash_parent, 0, 7);
6255                         }
6256                         $formats_nav .=
6257                                 ' (from';
6258                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
6259                                 if ($co{'parents'}[$i] eq $hash_parent) {
6260                                         $formats_nav .= ' parent ' . ($i+1);
6261                                         last;
6262                                 }
6263                         }
6264                         $formats_nav .= ': ' .
6265                                 $cgi->a({-href => href(action=>"commitdiff",
6266                                                        hash=>$hash_parent)},
6267                                         esc_html($hash_parent_short)) .
6268                                 ')';
6269                 } elsif (!$co{'parent'}) {
6270                         # --root commitdiff
6271                         $formats_nav .= ' (initial)';
6272                 } elsif (scalar @{$co{'parents'}} == 1) {
6273                         # single parent commit
6274                         $formats_nav .=
6275                                 ' (parent: ' .
6276                                 $cgi->a({-href => href(action=>"commitdiff",
6277                                                        hash=>$co{'parent'})},
6278                                         esc_html(substr($co{'parent'}, 0, 7))) .
6279                                 ')';
6280                 } else {
6281                         # merge commit
6282                         if ($hash_parent eq '--cc') {
6283                                 $formats_nav .= ' | ' .
6284                                         $cgi->a({-href => href(action=>"commitdiff",
6285                                                                hash=>$hash, hash_parent=>'-c')},
6286                                                 'combined');
6287                         } else { # $hash_parent eq '-c'
6288                                 $formats_nav .= ' | ' .
6289                                         $cgi->a({-href => href(action=>"commitdiff",
6290                                                                hash=>$hash, hash_parent=>'--cc')},
6291                                                 'compact');
6292                         }
6293                         $formats_nav .=
6294                                 ' (merge: ' .
6295                                 join(' ', map {
6296                                         $cgi->a({-href => href(action=>"commitdiff",
6297                                                                hash=>$_)},
6298                                                 esc_html(substr($_, 0, 7)));
6299                                 } @{$co{'parents'}} ) .
6300                                 ')';
6301                 }
6302         }
6303
6304         my $hash_parent_param = $hash_parent;
6305         if (!defined $hash_parent_param) {
6306                 # --cc for multiple parents, --root for parentless
6307                 $hash_parent_param =
6308                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
6309         }
6310
6311         # read commitdiff
6312         my $fd;
6313         my @difftree;
6314         if ($format eq 'html') {
6315                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6316                         "--no-commit-id", "--patch-with-raw", "--full-index",
6317                         $hash_parent_param, $hash, "--"
6318                         or die_error(500, "Open git-diff-tree failed");
6319
6320                 while (my $line = <$fd>) {
6321                         chomp $line;
6322                         # empty line ends raw part of diff-tree output
6323                         last unless $line;
6324                         push @difftree, scalar parse_difftree_raw_line($line);
6325                 }
6326
6327         } elsif ($format eq 'plain') {
6328                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6329                         '-p', $hash_parent_param, $hash, "--"
6330                         or die_error(500, "Open git-diff-tree failed");
6331         } elsif ($format eq 'patch') {
6332                 # For commit ranges, we limit the output to the number of
6333                 # patches specified in the 'patches' feature.
6334                 # For single commits, we limit the output to a single patch,
6335                 # diverging from the git-format-patch default.
6336                 my @commit_spec = ();
6337                 if ($hash_parent) {
6338                         if ($patch_max > 0) {
6339                                 push @commit_spec, "-$patch_max";
6340                         }
6341                         push @commit_spec, '-n', "$hash_parent..$hash";
6342                 } else {
6343                         if ($params{-single}) {
6344                                 push @commit_spec, '-1';
6345                         } else {
6346                                 if ($patch_max > 0) {
6347                                         push @commit_spec, "-$patch_max";
6348                                 }
6349                                 push @commit_spec, "-n";
6350                         }
6351                         push @commit_spec, '--root', $hash;
6352                 }
6353                 open $fd, "-|", git_cmd(), "format-patch", @diff_opts,
6354                         '--encoding=utf8', '--stdout', @commit_spec
6355                         or die_error(500, "Open git-format-patch failed");
6356         } else {
6357                 die_error(400, "Unknown commitdiff format");
6358         }
6359
6360         # non-textual hash id's can be cached
6361         my $expires;
6362         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
6363                 $expires = "+1d";
6364         }
6365
6366         # write commit message
6367         if ($format eq 'html') {
6368                 my $refs = git_get_references();
6369                 my $ref = format_ref_marker($refs, $co{'id'});
6370
6371                 git_header_html(undef, $expires);
6372                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
6373                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
6374                 print "<div class=\"title_text\">\n" .
6375                       "<table class=\"object_header\">\n";
6376                 git_print_authorship_rows(\%co);
6377                 print "</table>".
6378                       "</div>\n";
6379                 print "<div class=\"page_body\">\n";
6380                 if (@{$co{'comment'}} > 1) {
6381                         print "<div class=\"log\">\n";
6382                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
6383                         print "</div>\n"; # class="log"
6384                 }
6385
6386         } elsif ($format eq 'plain') {
6387                 my $refs = git_get_references("tags");
6388                 my $tagname = git_get_rev_name_tags($hash);
6389                 my $filename = basename($project) . "-$hash.patch";
6390
6391                 print $cgi->header(
6392                         -type => 'text/plain',
6393                         -charset => 'utf-8',
6394                         -expires => $expires,
6395                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6396                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
6397                 print "From: " . to_utf8($co{'author'}) . "\n";
6398                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
6399                 print "Subject: " . to_utf8($co{'title'}) . "\n";
6400
6401                 print "X-Git-Tag: $tagname\n" if $tagname;
6402                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
6403
6404                 foreach my $line (@{$co{'comment'}}) {
6405                         print to_utf8($line) . "\n";
6406                 }
6407                 print "---\n\n";
6408         } elsif ($format eq 'patch') {
6409                 my $filename = basename($project) . "-$hash.patch";
6410
6411                 print $cgi->header(
6412                         -type => 'text/plain',
6413                         -charset => 'utf-8',
6414                         -expires => $expires,
6415                         -content_disposition => 'inline; filename="' . "$filename" . '"');
6416         }
6417
6418         # write patch
6419         if ($format eq 'html') {
6420                 my $use_parents = !defined $hash_parent ||
6421                         $hash_parent eq '-c' || $hash_parent eq '--cc';
6422                 git_difftree_body(\@difftree, $hash,
6423                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6424                 print "<br/>\n";
6425
6426                 git_patchset_body($fd, \@difftree, $hash,
6427                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
6428                 close $fd;
6429                 print "</div>\n"; # class="page_body"
6430                 git_footer_html();
6431
6432         } elsif ($format eq 'plain') {
6433                 local $/ = undef;
6434                 print <$fd>;
6435                 close $fd
6436                         or print "Reading git-diff-tree failed\n";
6437         } elsif ($format eq 'patch') {
6438                 local $/ = undef;
6439                 print <$fd>;
6440                 close $fd
6441                         or print "Reading git-format-patch failed\n";
6442         }
6443 }
6444
6445 sub git_commitdiff_plain {
6446         git_commitdiff(-format => 'plain');
6447 }
6448
6449 # format-patch-style patches
6450 sub git_patch {
6451         git_commitdiff(-format => 'patch', -single => 1);
6452 }
6453
6454 sub git_patches {
6455         git_commitdiff(-format => 'patch');
6456 }
6457
6458 sub git_history {
6459         git_log_generic('history', \&git_history_body,
6460                         $hash_base, $hash_parent_base,
6461                         $file_name, $hash);
6462 }
6463
6464 sub git_search {
6465         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6466         if (!defined $searchtext) {
6467                 die_error(400, "Text field is empty");
6468         }
6469         if (!defined $hash) {
6470                 $hash = git_get_head_hash($project);
6471         }
6472         my %co = parse_commit($hash);
6473         if (!%co) {
6474                 die_error(404, "Unknown commit object");
6475         }
6476         if (!defined $page) {
6477                 $page = 0;
6478         }
6479
6480         $searchtype ||= 'commit';
6481         if ($searchtype eq 'pickaxe') {
6482                 # pickaxe may take all resources of your box and run for several minutes
6483                 # with every query - so decide by yourself how public you make this feature
6484                 gitweb_check_feature('pickaxe')
6485                     or die_error(403, "Pickaxe is disabled");
6486         }
6487         if ($searchtype eq 'grep') {
6488                 gitweb_check_feature('grep')
6489                     or die_error(403, "Grep is disabled");
6490         }
6491
6492         git_header_html();
6493
6494         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6495                 my $greptype;
6496                 if ($searchtype eq 'commit') {
6497                         $greptype = "--grep=";
6498                 } elsif ($searchtype eq 'author') {
6499                         $greptype = "--author=";
6500                 } elsif ($searchtype eq 'committer') {
6501                         $greptype = "--committer=";
6502                 }
6503                 $greptype .= $searchtext;
6504                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6505                                                $greptype, '--regexp-ignore-case',
6506                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6507
6508                 my $paging_nav = '';
6509                 if ($page > 0) {
6510                         $paging_nav .=
6511                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6512                                                        searchtext=>$searchtext,
6513                                                        searchtype=>$searchtype)},
6514                                         "first");
6515                         $paging_nav .= " &sdot; " .
6516                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6517                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6518                 } else {
6519                         $paging_nav .= "first";
6520                         $paging_nav .= " &sdot; prev";
6521                 }
6522                 my $next_link = '';
6523                 if ($#commitlist >= 100) {
6524                         $next_link =
6525                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6526                                          -accesskey => "n", -title => "Alt-n"}, "next");
6527                         $paging_nav .= " &sdot; $next_link";
6528                 } else {
6529                         $paging_nav .= " &sdot; next";
6530                 }
6531
6532                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6533                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6534                 if ($page == 0 && !@commitlist) {
6535                         print "<p>No match.</p>\n";
6536                 } else {
6537                         git_search_grep_body(\@commitlist, 0, 99, $next_link);
6538                 }
6539         }
6540
6541         if ($searchtype eq 'pickaxe') {
6542                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6543                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6544
6545                 print "<table class=\"pickaxe search\">\n";
6546                 my $alternate = 1;
6547                 local $/ = "\n";
6548                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6549                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6550                         ($search_use_regexp ? '--pickaxe-regex' : ());
6551                 undef %co;
6552                 my @files;
6553                 while (my $line = <$fd>) {
6554                         chomp $line;
6555                         next unless $line;
6556
6557                         my %set = parse_difftree_raw_line($line);
6558                         if (defined $set{'commit'}) {
6559                                 # finish previous commit
6560                                 if (%co) {
6561                                         print "</td>\n" .
6562                                               "<td class=\"link\">" .
6563                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6564                                               " | " .
6565                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6566                                         print "</td>\n" .
6567                                               "</tr>\n";
6568                                 }
6569
6570                                 if ($alternate) {
6571                                         print "<tr class=\"dark\">\n";
6572                                 } else {
6573                                         print "<tr class=\"light\">\n";
6574                                 }
6575                                 $alternate ^= 1;
6576                                 %co = parse_commit($set{'commit'});
6577                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6578                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6579                                       "<td><i>$author</i></td>\n" .
6580                                       "<td>" .
6581                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6582                                               -class => "list subject"},
6583                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6584                         } elsif (defined $set{'to_id'}) {
6585                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6586
6587                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6588                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6589                                               -class => "list"},
6590                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6591                                       "<br/>\n";
6592                         }
6593                 }
6594                 close $fd;
6595
6596                 # finish last commit (warning: repetition!)
6597                 if (%co) {
6598                         print "</td>\n" .
6599                               "<td class=\"link\">" .
6600                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6601                               " | " .
6602                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6603                         print "</td>\n" .
6604                               "</tr>\n";
6605                 }
6606
6607                 print "</table>\n";
6608         }
6609
6610         if ($searchtype eq 'grep') {
6611                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6612                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6613
6614                 print "<table class=\"grep_search\">\n";
6615                 my $alternate = 1;
6616                 my $matches = 0;
6617                 local $/ = "\n";
6618                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6619                         $search_use_regexp ? ('-E', '-i') : '-F',
6620                         $searchtext, $co{'tree'};
6621                 my $lastfile = '';
6622                 while (my $line = <$fd>) {
6623                         chomp $line;
6624                         my ($file, $lno, $ltext, $binary);
6625                         last if ($matches++ > 1000);
6626                         if ($line =~ /^Binary file (.+) matches$/) {
6627                                 $file = $1;
6628                                 $binary = 1;
6629                         } else {
6630                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6631                         }
6632                         if ($file ne $lastfile) {
6633                                 $lastfile and print "</td></tr>\n";
6634                                 if ($alternate++) {
6635                                         print "<tr class=\"dark\">\n";
6636                                 } else {
6637                                         print "<tr class=\"light\">\n";
6638                                 }
6639                                 print "<td class=\"list\">".
6640                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6641                                                                file_name=>"$file"),
6642                                                 -class => "list"}, esc_path($file));
6643                                 print "</td><td>\n";
6644                                 $lastfile = $file;
6645                         }
6646                         if ($binary) {
6647                                 print "<div class=\"binary\">Binary file</div>\n";
6648                         } else {
6649                                 $ltext = untabify($ltext);
6650                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6651                                         $ltext = esc_html($1, -nbsp=>1);
6652                                         $ltext .= '<span class="match">';
6653                                         $ltext .= esc_html($2, -nbsp=>1);
6654                                         $ltext .= '</span>';
6655                                         $ltext .= esc_html($3, -nbsp=>1);
6656                                 } else {
6657                                         $ltext = esc_html($ltext, -nbsp=>1);
6658                                 }
6659                                 print "<div class=\"pre\">" .
6660                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6661                                                                file_name=>"$file").'#l'.$lno,
6662                                                 -class => "linenr"}, sprintf('%4i', $lno))
6663                                         . ' ' .  $ltext . "</div>\n";
6664                         }
6665                 }
6666                 if ($lastfile) {
6667                         print "</td></tr>\n";
6668                         if ($matches > 1000) {
6669                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6670                         }
6671                 } else {
6672                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6673                 }
6674                 close $fd;
6675
6676                 print "</table>\n";
6677         }
6678         git_footer_html();
6679 }
6680
6681 sub git_search_help {
6682         git_header_html();
6683         git_print_page_nav('','', $hash,$hash,$hash);
6684         print <<EOT;
6685 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6686 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6687 the pattern entered is recognized as the POSIX extended
6688 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6689 insensitive).</p>
6690 <dl>
6691 <dt><b>commit</b></dt>
6692 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6693 EOT
6694         my $have_grep = gitweb_check_feature('grep');
6695         if ($have_grep) {
6696                 print <<EOT;
6697 <dt><b>grep</b></dt>
6698 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6699     a different one) are searched for the given pattern. On large trees, this search can take
6700 a while and put some strain on the server, so please use it with some consideration. Note that
6701 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6702 case-sensitive.</dd>
6703 EOT
6704         }
6705         print <<EOT;
6706 <dt><b>author</b></dt>
6707 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6708 <dt><b>committer</b></dt>
6709 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6710 EOT
6711         my $have_pickaxe = gitweb_check_feature('pickaxe');
6712         if ($have_pickaxe) {
6713                 print <<EOT;
6714 <dt><b>pickaxe</b></dt>
6715 <dd>All commits that caused the string to appear or disappear from any file (changes that
6716 added, removed or "modified" the string) will be listed. This search can take a while and
6717 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6718 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6719 EOT
6720         }
6721         print "</dl>\n";
6722         git_footer_html();
6723 }
6724
6725 sub git_shortlog {
6726         git_log_generic('shortlog', \&git_shortlog_body,
6727                         $hash, $hash_parent);
6728 }
6729
6730 ## ......................................................................
6731 ## feeds (RSS, Atom; OPML)
6732
6733 sub git_feed {
6734         my $format = shift || 'atom';
6735         my $have_blame = gitweb_check_feature('blame');
6736
6737         # Atom: http://www.atomenabled.org/developers/syndication/
6738         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6739         if ($format ne 'rss' && $format ne 'atom') {
6740                 die_error(400, "Unknown web feed format");
6741         }
6742
6743         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6744         my $head = $hash || 'HEAD';
6745         my @commitlist = parse_commits($head, 150, 0, $file_name);
6746
6747         my %latest_commit;
6748         my %latest_date;
6749         my $content_type = "application/$format+xml";
6750         if (defined $cgi->http('HTTP_ACCEPT') &&
6751                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6752                 # browser (feed reader) prefers text/xml
6753                 $content_type = 'text/xml';
6754         }
6755         if (defined($commitlist[0])) {
6756                 %latest_commit = %{$commitlist[0]};
6757                 my $latest_epoch = $latest_commit{'committer_epoch'};
6758                 %latest_date   = parse_date($latest_epoch);
6759                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6760                 if (defined $if_modified) {
6761                         my $since;
6762                         if (eval { require HTTP::Date; 1; }) {
6763                                 $since = HTTP::Date::str2time($if_modified);
6764                         } elsif (eval { require Time::ParseDate; 1; }) {
6765                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6766                         }
6767                         if (defined $since && $latest_epoch <= $since) {
6768                                 print $cgi->header(
6769                                         -type => $content_type,
6770                                         -charset => 'utf-8',
6771                                         -last_modified => $latest_date{'rfc2822'},
6772                                         -status => '304 Not Modified');
6773                                 return;
6774                         }
6775                 }
6776                 print $cgi->header(
6777                         -type => $content_type,
6778                         -charset => 'utf-8',
6779                         -last_modified => $latest_date{'rfc2822'});
6780         } else {
6781                 print $cgi->header(
6782                         -type => $content_type,
6783                         -charset => 'utf-8');
6784         }
6785
6786         # Optimization: skip generating the body if client asks only
6787         # for Last-Modified date.
6788         return if ($cgi->request_method() eq 'HEAD');
6789
6790         # header variables
6791         my $title = "$site_name - $project/$action";
6792         my $feed_type = 'log';
6793         if (defined $hash) {
6794                 $title .= " - '$hash'";
6795                 $feed_type = 'branch log';
6796                 if (defined $file_name) {
6797                         $title .= " :: $file_name";
6798                         $feed_type = 'history';
6799                 }
6800         } elsif (defined $file_name) {
6801                 $title .= " - $file_name";
6802                 $feed_type = 'history';
6803         }
6804         $title .= " $feed_type";
6805         my $descr = git_get_project_description($project);
6806         if (defined $descr) {
6807                 $descr = esc_html($descr);
6808         } else {
6809                 $descr = "$project " .
6810                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6811                          " feed";
6812         }
6813         my $owner = git_get_project_owner($project);
6814         $owner = esc_html($owner);
6815
6816         #header
6817         my $alt_url;
6818         if (defined $file_name) {
6819                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6820         } elsif (defined $hash) {
6821                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6822         } else {
6823                 $alt_url = href(-full=>1, action=>"summary");
6824         }
6825         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6826         if ($format eq 'rss') {
6827                 print <<XML;
6828 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6829 <channel>
6830 XML
6831                 print "<title>$title</title>\n" .
6832                       "<link>$alt_url</link>\n" .
6833                       "<description>$descr</description>\n" .
6834                       "<language>en</language>\n" .
6835                       # project owner is responsible for 'editorial' content
6836                       "<managingEditor>$owner</managingEditor>\n";
6837                 if (defined $logo || defined $favicon) {
6838                         # prefer the logo to the favicon, since RSS
6839                         # doesn't allow both
6840                         my $img = esc_url($logo || $favicon);
6841                         print "<image>\n" .
6842                               "<url>$img</url>\n" .
6843                               "<title>$title</title>\n" .
6844                               "<link>$alt_url</link>\n" .
6845                               "</image>\n";
6846                 }
6847                 if (%latest_date) {
6848                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6849                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6850                 }
6851                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6852         } elsif ($format eq 'atom') {
6853                 print <<XML;
6854 <feed xmlns="http://www.w3.org/2005/Atom">
6855 XML
6856                 print "<title>$title</title>\n" .
6857                       "<subtitle>$descr</subtitle>\n" .
6858                       '<link rel="alternate" type="text/html" href="' .
6859                       $alt_url . '" />' . "\n" .
6860                       '<link rel="self" type="' . $content_type . '" href="' .
6861                       $cgi->self_url() . '" />' . "\n" .
6862                       "<id>" . href(-full=>1) . "</id>\n" .
6863                       # use project owner for feed author
6864                       "<author><name>$owner</name></author>\n";
6865                 if (defined $favicon) {
6866                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6867                 }
6868                 if (defined $logo_url) {
6869                         # not twice as wide as tall: 72 x 27 pixels
6870                         print "<logo>" . esc_url($logo) . "</logo>\n";
6871                 }
6872                 if (! %latest_date) {
6873                         # dummy date to keep the feed valid until commits trickle in:
6874                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6875                 } else {
6876                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6877                 }
6878                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6879         }
6880
6881         # contents
6882         for (my $i = 0; $i <= $#commitlist; $i++) {
6883                 my %co = %{$commitlist[$i]};
6884                 my $commit = $co{'id'};
6885                 # we read 150, we always show 30 and the ones more recent than 48 hours
6886                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6887                         last;
6888                 }
6889                 my %cd = parse_date($co{'author_epoch'});
6890
6891                 # get list of changed files
6892                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6893                         $co{'parent'} || "--root",
6894                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6895                         or next;
6896                 my @difftree = map { chomp; $_ } <$fd>;
6897                 close $fd
6898                         or next;
6899
6900                 # print element (entry, item)
6901                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6902                 if ($format eq 'rss') {
6903                         print "<item>\n" .
6904                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6905                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6906                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6907                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6908                               "<link>$co_url</link>\n" .
6909                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6910                               "<content:encoded>" .
6911                               "<![CDATA[\n";
6912                 } elsif ($format eq 'atom') {
6913                         print "<entry>\n" .
6914                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6915                               "<updated>$cd{'iso-8601'}</updated>\n" .
6916                               "<author>\n" .
6917                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6918                         if ($co{'author_email'}) {
6919                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6920                         }
6921                         print "</author>\n" .
6922                               # use committer for contributor
6923                               "<contributor>\n" .
6924                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6925                         if ($co{'committer_email'}) {
6926                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6927                         }
6928                         print "</contributor>\n" .
6929                               "<published>$cd{'iso-8601'}</published>\n" .
6930                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6931                               "<id>$co_url</id>\n" .
6932                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6933                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6934                 }
6935                 my $comment = $co{'comment'};
6936                 print "<pre>\n";
6937                 foreach my $line (@$comment) {
6938                         $line = esc_html($line);
6939                         print "$line\n";
6940                 }
6941                 print "</pre><ul>\n";
6942                 foreach my $difftree_line (@difftree) {
6943                         my %difftree = parse_difftree_raw_line($difftree_line);
6944                         next if !$difftree{'from_id'};
6945
6946                         my $file = $difftree{'file'} || $difftree{'to_file'};
6947
6948                         print "<li>" .
6949                               "[" .
6950                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6951                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6952                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6953                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6954                                       -title => "diff"}, 'D');
6955                         if ($have_blame) {
6956                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6957                                                              file_name=>$file, hash_base=>$commit),
6958                                               -title => "blame"}, 'B');
6959                         }
6960                         # if this is not a feed of a file history
6961                         if (!defined $file_name || $file_name ne $file) {
6962                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6963                                                              file_name=>$file, hash=>$commit),
6964                                               -title => "history"}, 'H');
6965                         }
6966                         $file = esc_path($file);
6967                         print "] ".
6968                               "$file</li>\n";
6969                 }
6970                 if ($format eq 'rss') {
6971                         print "</ul>]]>\n" .
6972                               "</content:encoded>\n" .
6973                               "</item>\n";
6974                 } elsif ($format eq 'atom') {
6975                         print "</ul>\n</div>\n" .
6976                               "</content>\n" .
6977                               "</entry>\n";
6978                 }
6979         }
6980
6981         # end of feed
6982         if ($format eq 'rss') {
6983                 print "</channel>\n</rss>\n";
6984         } elsif ($format eq 'atom') {
6985                 print "</feed>\n";
6986         }
6987 }
6988
6989 sub git_rss {
6990         git_feed('rss');
6991 }
6992
6993 sub git_atom {
6994         git_feed('atom');
6995 }
6996
6997 sub git_opml {
6998         my @list = git_get_projects_list();
6999
7000         print $cgi->header(
7001                 -type => 'text/xml',
7002                 -charset => 'utf-8',
7003                 -content_disposition => 'inline; filename="opml.xml"');
7004
7005         print <<XML;
7006 <?xml version="1.0" encoding="utf-8"?>
7007 <opml version="1.0">
7008 <head>
7009   <title>$site_name OPML Export</title>
7010 </head>
7011 <body>
7012 <outline text="git RSS feeds">
7013 XML
7014
7015         foreach my $pr (@list) {
7016                 my %proj = %$pr;
7017                 my $head = git_get_head_hash($proj{'path'});
7018                 if (!defined $head) {
7019                         next;
7020                 }
7021                 $git_dir = "$projectroot/$proj{'path'}";
7022                 my %co = parse_commit($head);
7023                 if (!%co) {
7024                         next;
7025                 }
7026
7027                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
7028                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
7029                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
7030                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
7031         }
7032         print <<XML;
7033 </outline>
7034 </body>
7035 </opml>
7036 XML
7037 }