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