git.oblomov.eu Git - git/blob - gitweb/gitweb.perl

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