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);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 BEGIN {
  22         CGI->compile() if $ENV{'MOD_PERL'};
  23 }
  24
  25 our $cgi = new CGI;
  26 our $version = "++GIT_VERSION++";
  27 our $my_url = $cgi->url();
  28 our $my_uri = $cgi->url(-absolute => 1);
  29
  30 # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  31 # needed and used only for URLs with nonempty PATH_INFO
  32 our $base_url = $my_url;
  33
  34 # When the script is used as DirectoryIndex, the URL does not contain the name
  35 # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  36 # have to do it ourselves. We make $path_info global because it's also used
  37 # later on.
  38 #
  39 # Another issue with the script being the DirectoryIndex is that the resulting
  40 # $my_url data is not the full script URL: this is good, because we want
  41 # generated links to keep implying the script name if it wasn't explicitly
  42 # indicated in the URL we're handling, but it means that $my_url cannot be used
  43 # as base URL.
  44 # Therefore, if we needed to strip PATH_INFO, then we know that we have
  45 # to build the base URL ourselves:
  46 our $path_info = $ENV{"PATH_INFO"};
  47 if ($path_info) {
  48         if ($my_url =~ s,\Q$path_info\E$,, &&
  49             $my_uri =~ s,\Q$path_info\E$,, &&
  50             defined $ENV{'SCRIPT_NAME'}) {
  51                 $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  52         }
  53 }
  54
  55 # core git executable to use
  56 # this can just be "git" if your webserver has a sensible PATH
  57 our $GIT = "++GIT_BINDIR++/git";
  58
  59 # absolute fs-path which will be prepended to the project path
  60 #our $projectroot = "/pub/scm";
  61 our $projectroot = "++GITWEB_PROJECTROOT++";
  62
  63 # fs traversing limit for getting project list
  64 # the number is relative to the projectroot
  65 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  66
  67 # target of the home link on top of all pages
  68 our $home_link = $my_uri || "/";
  69
  70 # string of the home link on top of all pages
  71 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  72
  73 # name of your site or organization to appear in page titles
  74 # replace this with something more descriptive for clearer bookmarks
  75 our $site_name = "++GITWEB_SITENAME++"
  76                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  77
  78 # filename of html text to include at top of each page
  79 our $site_header = "++GITWEB_SITE_HEADER++";
  80 # html text to include at home page
  81 our $home_text = "++GITWEB_HOMETEXT++";
  82 # filename of html text to include at bottom of each page
  83 our $site_footer = "++GITWEB_SITE_FOOTER++";
  84
  85 # URI of stylesheets
  86 our @stylesheets = ("++GITWEB_CSS++");
  87 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  88 our $stylesheet = undef;
  89 # URI of GIT logo (72x27 size)
  90 our $logo = "++GITWEB_LOGO++";
  91 # URI of GIT favicon, assumed to be image/png type
  92 our $favicon = "++GITWEB_FAVICON++";
  93 # URI of gitweb.js
  94 our $gitwebjs = "++GITWEB_GITWEBJS++";
  95
  96 # URI and label (title) of GIT logo link
  97 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  98 #our $logo_label = "git documentation";
  99 our $logo_url = "http://git-scm.com/";
 100 our $logo_label = "git homepage";
 101
 102 # source of projects list
 103 our $projects_list = "++GITWEB_LIST++";
 104
 105 # the width (in characters) of the projects list "Description" column
 106 our $projects_list_description_width = 25;
 107
 108 # default order of projects list
 109 # valid values are none, project, descr, owner, and age
 110 our $default_projects_order = "project";
 111
 112 # show repository only if this file exists
 113 # (only effective if this variable evaluates to true)
 114 our $export_ok = "++GITWEB_EXPORT_OK++";
 115
 116 # show repository only if this subroutine returns true
 117 # when given the path to the project, for example:
 118 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 119 our $export_auth_hook = undef;
 120
 121 # only allow viewing of repositories also shown on the overview page
 122 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 123
 124 # list of git base URLs used for URL to where fetch project from,
 125 # i.e. full URL is "$git_base_url/$project"
 126 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 127
 128 # default blob_plain mimetype and default charset for text/plain blob
 129 our $default_blob_plain_mimetype = 'text/plain';
 130 our $default_text_plain_charset  = undef;
 131
 132 # file to use for guessing MIME types before trying /etc/mime.types
 133 # (relative to the current git repository)
 134 our $mimetypes_file = undef;
 135
 136 # assume this charset if line contains non-UTF-8 characters;
 137 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 138 # for which encoding all byte sequences are valid, for example
 139 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 140 # could be even 'utf-8' for the old behavior)
 141 our $fallback_encoding = 'latin1';
 142
 143 # rename detection options for git-diff and git-diff-tree
 144 # - default is '-M', with the cost proportional to
 145 #   (number of removed files) * (number of new files).
 146 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 147 #   (number of changed files + number of removed files) * (number of new files)
 148 # - even more costly is '-C', '--find-copies-harder' with cost
 149 #   (number of files in the original tree) * (number of new files)
 150 # - one might want to include '-B' option, e.g. '-B', '-M'
 151 our @diff_opts = ('-M'); # taken from git_commit
 152
 153 # Disables features that would allow repository owners to inject script into
 154 # the gitweb domain.
 155 our $prevent_xss = 0;
 156
 157 # information about snapshot formats that gitweb is capable of serving
 158 our %known_snapshot_formats = (
 159         # name => {
 160         #       'display' => display name,
 161         #       'type' => mime type,
 162         #       'suffix' => filename suffix,
 163         #       'format' => --format for git-archive,
 164         #       'compressor' => [compressor command and arguments]
 165         #                       (array reference, optional)
 166         #       'disabled' => boolean (optional)}
 167         #
 168         'tgz' => {
 169                 'display' => 'tar.gz',
 170                 'type' => 'application/x-gzip',
 171                 'suffix' => '.tar.gz',
 172                 'format' => 'tar',
 173                 'compressor' => ['gzip']},
 174
 175         'tbz2' => {
 176                 'display' => 'tar.bz2',
 177                 'type' => 'application/x-bzip2',
 178                 'suffix' => '.tar.bz2',
 179                 'format' => 'tar',
 180                 'compressor' => ['bzip2']},
 181
 182         'txz' => {
 183                 'display' => 'tar.xz',
 184                 'type' => 'application/x-xz',
 185                 'suffix' => '.tar.xz',
 186                 'format' => 'tar',
 187                 'compressor' => ['xz'],
 188                 'disabled' => 1},
 189
 190         'zip' => {
 191                 'display' => 'zip',
 192                 'type' => 'application/x-zip',
 193                 'suffix' => '.zip',
 194                 'format' => 'zip'},
 195 );
 196
 197 # Aliases so we understand old gitweb.snapshot values in repository
 198 # configuration.
 199 our %known_snapshot_format_aliases = (
 200         'gzip'  => 'tgz',
 201         'bzip2' => 'tbz2',
 202         'xz'    => 'txz',
 203
 204         # backward compatibility: legacy gitweb config support
 205         'x-gzip' => undef, 'gz' => undef,
 206         'x-bzip2' => undef, 'bz2' => undef,
 207         'x-zip' => undef, '' => undef,
 208 );
 209
 210 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 211 # are changed, it may be appropriate to change these values too via
 212 # $GITWEB_CONFIG.
 213 our %avatar_size = (
 214         'default' => 16,
 215         'double'  => 32
 216 );
 217
 218 # You define site-wide feature defaults here; override them with
 219 # $GITWEB_CONFIG as necessary.
 220 our %feature = (
 221         # feature => {
 222         #       'sub' => feature-sub (subroutine),
 223         #       'override' => allow-override (boolean),
 224         #       'default' => [ default options...] (array reference)}
 225         #
 226         # if feature is overridable (it means that allow-override has true value),
 227         # then feature-sub will be called with default options as parameters;
 228         # return value of feature-sub indicates if to enable specified feature
 229         #
 230         # if there is no 'sub' key (no feature-sub), then feature cannot be
 231         # overriden
 232         #
 233         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 234         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 235         # is enabled
 236
 237         # Enable the 'blame' blob view, showing the last commit that modified
 238         # each line in the file. This can be very CPU-intensive.
 239
 240         # To enable system wide have in $GITWEB_CONFIG
 241         # $feature{'blame'}{'default'} = [1];
 242         # To have project specific config enable override in $GITWEB_CONFIG
 243         # $feature{'blame'}{'override'} = 1;
 244         # and in project config gitweb.blame = 0|1;
 245         'blame' => {
 246                 'sub' => sub { feature_bool('blame', @_) },
 247                 'override' => 0,
 248                 'default' => [0]},
 249
 250         # Enable the 'incremental blame' blob view, which uses javascript to
 251         # incrementally show the revisions of lines as they are discovered
 252         # in the history. It is better for large histories, files and slow
 253         # servers, but requires javascript in the client, can slow down the
 254         # browser on large files and does not show author initials.
 255
 256         # To enable system wide have in $GITWEB_CONFIG
 257         # $feature{'blame_incremental'}{'default'} = [1];
 258         # To have project specific config enable override in $GITWEB_CONFIG
 259         # $feature{'blame_incremental'}{'override'} = 1;
 260         # and in project config gitweb.blame_incremental = 0|1;
 261         'blame_incremental' => {
 262                 'sub' => sub { feature_bool('blame_incremental', @_) },
 263                 'override' => 0,
 264                 'default' => [0]},
 265
 266         # Enable the 'snapshot' link, providing a compressed archive of any
 267         # tree. This can potentially generate high traffic if you have large
 268         # project.
 269
 270         # Value is a list of formats defined in %known_snapshot_formats that
 271         # you wish to offer.
 272         # To disable system wide have in $GITWEB_CONFIG
 273         # $feature{'snapshot'}{'default'} = [];
 274         # To have project specific config enable override in $GITWEB_CONFIG
 275         # $feature{'snapshot'}{'override'} = 1;
 276         # and in project config, a comma-separated list of formats or "none"
 277         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 278         'snapshot' => {
 279                 'sub' => \&feature_snapshot,
 280                 'override' => 0,
 281                 'default' => ['tgz']},
 282
 283         # Enable text search, which will list the commits which match author,
 284         # committer or commit text to a given string.  Enabled by default.
 285         # Project specific override is not supported.
 286         'search' => {
 287                 'override' => 0,
 288                 'default' => [1]},
 289
 290         # Enable grep search, which will list the files in currently selected
 291         # tree containing the given string. Enabled by default. This can be
 292         # potentially CPU-intensive, of course.
 293
 294         # To enable system wide have in $GITWEB_CONFIG
 295         # $feature{'grep'}{'default'} = [1];
 296         # To have project specific config enable override in $GITWEB_CONFIG
 297         # $feature{'grep'}{'override'} = 1;
 298         # and in project config gitweb.grep = 0|1;
 299         'grep' => {
 300                 'sub' => sub { feature_bool('grep', @_) },
 301                 'override' => 0,
 302                 'default' => [1]},
 303
 304         # Enable the pickaxe search, which will list the commits that modified
 305         # a given string in a file. This can be practical and quite faster
 306         # alternative to 'blame', but still potentially CPU-intensive.
 307
 308         # To enable system wide have in $GITWEB_CONFIG
 309         # $feature{'pickaxe'}{'default'} = [1];
 310         # To have project specific config enable override in $GITWEB_CONFIG
 311         # $feature{'pickaxe'}{'override'} = 1;
 312         # and in project config gitweb.pickaxe = 0|1;
 313         'pickaxe' => {
 314                 'sub' => sub { feature_bool('pickaxe', @_) },
 315                 'override' => 0,
 316                 'default' => [1]},
 317
 318         # Enable showing size of blobs in a 'tree' view, in a separate
 319         # column, similar to what 'ls -l' does.  This cost a bit of IO.
 320
 321         # To disable system wide have in $GITWEB_CONFIG
 322         # $feature{'show-sizes'}{'default'} = [0];
 323         # To have project specific config enable override in $GITWEB_CONFIG
 324         # $feature{'show-sizes'}{'override'} = 1;
 325         # and in project config gitweb.showsizes = 0|1;
 326         'show-sizes' => {
 327                 'sub' => sub { feature_bool('showsizes', @_) },
 328                 'override' => 0,
 329                 'default' => [1]},
 330
 331         # Make gitweb use an alternative format of the URLs which can be
 332         # more readable and natural-looking: project name is embedded
 333         # directly in the path and the query string contains other
 334         # auxiliary information. All gitweb installations recognize
 335         # URL in either format; this configures in which formats gitweb
 336         # generates links.
 337
 338         # To enable system wide have in $GITWEB_CONFIG
 339         # $feature{'pathinfo'}{'default'} = [1];
 340         # Project specific override is not supported.
 341
 342         # Note that you will need to change the default location of CSS,
 343         # favicon, logo and possibly other files to an absolute URL. Also,
 344         # if gitweb.cgi serves as your indexfile, you will need to force
 345         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 346         'pathinfo' => {
 347                 'override' => 0,
 348                 'default' => [0]},
 349
 350         # Make gitweb consider projects in project root subdirectories
 351         # to be forks of existing projects. Given project $projname.git,
 352         # projects matching $projname/*.git will not be shown in the main
 353         # projects list, instead a '+' mark will be added to $projname
 354         # there and a 'forks' view will be enabled for the project, listing
 355         # all the forks. If project list is taken from a file, forks have
 356         # to be listed after the main project.
 357
 358         # To enable system wide have in $GITWEB_CONFIG
 359         # $feature{'forks'}{'default'} = [1];
 360         # Project specific override is not supported.
 361         'forks' => {
 362                 'override' => 0,
 363                 'default' => [0]},
 364
 365         # Insert custom links to the action bar of all project pages.
 366         # This enables you mainly to link to third-party scripts integrating
 367         # into gitweb; e.g. git-browser for graphical history representation
 368         # or custom web-based repository administration interface.
 369
 370         # The 'default' value consists of a list of triplets in the form
 371         # (label, link, position) where position is the label after which
 372         # to insert the link and link is a format string where %n expands
 373         # to the project name, %f to the project path within the filesystem,
 374         # %h to the current hash (h gitweb parameter) and %b to the current
 375         # hash base (hb gitweb parameter); %% expands to %.
 376
 377         # To enable system wide have in $GITWEB_CONFIG e.g.
 378         # $feature{'actions'}{'default'} = [('graphiclog',
 379         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 380         # Project specific override is not supported.
 381         'actions' => {
 382                 'override' => 0,
 383                 'default' => []},
 384
 385         # Allow gitweb scan project content tags described in ctags/
 386         # of project repository, and display the popular Web 2.0-ish
 387         # "tag cloud" near the project list. Note that this is something
 388         # COMPLETELY different from the normal Git tags.
 389
 390         # gitweb by itself can show existing tags, but it does not handle
 391         # tagging itself; you need an external application for that.
 392         # For an example script, check Girocco's cgi/tagproj.cgi.
 393         # You may want to install the HTML::TagCloud Perl module to get
 394         # a pretty tag cloud instead of just a list of tags.
 395
 396         # To enable system wide have in $GITWEB_CONFIG
 397         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 398         # Project specific override is not supported.
 399         'ctags' => {
 400                 'override' => 0,
 401                 'default' => [0]},
 402
 403         # The maximum number of patches in a patchset generated in patch
 404         # view. Set this to 0 or undef to disable patch view, or to a
 405         # negative number to remove any limit.
 406
 407         # To disable system wide have in $GITWEB_CONFIG
 408         # $feature{'patches'}{'default'} = [0];
 409         # To have project specific config enable override in $GITWEB_CONFIG
 410         # $feature{'patches'}{'override'} = 1;
 411         # and in project config gitweb.patches = 0|n;
 412         # where n is the maximum number of patches allowed in a patchset.
 413         'patches' => {
 414                 'sub' => \&feature_patches,
 415                 'override' => 0,
 416                 'default' => [16]},
 417
 418         # Avatar support. When this feature is enabled, views such as
 419         # shortlog or commit will display an avatar associated with
 420         # the email of the committer(s) and/or author(s).
 421
 422         # Currently available providers are gravatar and picon.
 423         # If an unknown provider is specified, the feature is disabled.
 424
 425         # Gravatar depends on Digest::MD5.
 426         # Picon currently relies on the indiana.edu database.
 427
 428         # To enable system wide have in $GITWEB_CONFIG
 429         # $feature{'avatar'}{'default'} = ['<provider>'];
 430         # where <provider> is either gravatar or picon.
 431         # To have project specific config enable override in $GITWEB_CONFIG
 432         # $feature{'avatar'}{'override'} = 1;
 433         # and in project config gitweb.avatar = <provider>;
 434         'avatar' => {
 435                 'sub' => \&feature_avatar,
 436                 'override' => 0,
 437                 'default' => ['']},
 438 );
 439
 440 sub gitweb_get_feature {
 441         my ($name) = @_;
 442         return unless exists $feature{$name};
 443         my ($sub, $override, @defaults) = (
 444                 $feature{$name}{'sub'},
 445                 $feature{$name}{'override'},
 446                 @{$feature{$name}{'default'}});
 447         if (!$override) { return @defaults; }
 448         if (!defined $sub) {
 449                 warn "feature $name is not overridable";
 450                 return @defaults;
 451         }
 452         return $sub->(@defaults);
 453 }
 454
 455 # A wrapper to check if a given feature is enabled.
 456 # With this, you can say
 457 #
 458 #   my $bool_feat = gitweb_check_feature('bool_feat');
 459 #   gitweb_check_feature('bool_feat') or somecode;
 460 #
 461 # instead of
 462 #
 463 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 464 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 465 #
 466 sub gitweb_check_feature {
 467         return (gitweb_get_feature(@_))[0];
 468 }
 469
 470
 471 sub feature_bool {
 472         my $key = shift;
 473         my ($val) = git_get_project_config($key, '--bool');
 474
 475         if (!defined $val) {
 476                 return ($_[0]);
 477         } elsif ($val eq 'true') {
 478                 return (1);
 479         } elsif ($val eq 'false') {
 480                 return (0);
 481         }
 482 }
 483
 484 sub feature_snapshot {
 485         my (@fmts) = @_;
 486
 487         my ($val) = git_get_project_config('snapshot');
 488
 489         if ($val) {
 490                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 491         }
 492
 493         return @fmts;
 494 }
 495
 496 sub feature_patches {
 497         my @val = (git_get_project_config('patches', '--int'));
 498
 499         if (@val) {
 500                 return @val;
 501         }
 502
 503         return ($_[0]);
 504 }
 505
 506 sub feature_avatar {
 507         my @val = (git_get_project_config('avatar'));
 508
 509         return @val ? @val : @_;
 510 }
 511
 512 # checking HEAD file with -e is fragile if the repository was
 513 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 514 # and then pruned.
 515 sub check_head_link {
 516         my ($dir) = @_;
 517         my $headfile = "$dir/HEAD";
 518         return ((-e $headfile) ||
 519                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 520 }
 521
 522 sub check_export_ok {
 523         my ($dir) = @_;
 524         return (check_head_link($dir) &&
 525                 (!$export_ok || -e "$dir/$export_ok") &&
 526                 (!$export_auth_hook || $export_auth_hook->($dir)));
 527 }
 528
 529 # process alternate names for backward compatibility
 530 # filter out unsupported (unknown) snapshot formats
 531 sub filter_snapshot_fmts {
 532         my @fmts = @_;
 533
 534         @fmts = map {
 535                 exists $known_snapshot_format_aliases{$_} ?
 536                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 537         @fmts = grep {
 538                 exists $known_snapshot_formats{$_} &&
 539                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 540 }
 541
 542 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 543 if (-e $GITWEB_CONFIG) {
 544         do $GITWEB_CONFIG;
 545 } else {
 546         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 547         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 548 }
 549
 550 # version of the core git binary
 551 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 552
 553 $projects_list ||= $projectroot;
 554
 555 # ======================================================================
 556 # input validation and dispatch
 557
 558 # input parameters can be collected from a variety of sources (presently, CGI
 559 # and PATH_INFO), so we define an %input_params hash that collects them all
 560 # together during validation: this allows subsequent uses (e.g. href()) to be
 561 # agnostic of the parameter origin
 562
 563 our %input_params = ();
 564
 565 # input parameters are stored with the long parameter name as key. This will
 566 # also be used in the href subroutine to convert parameters to their CGI
 567 # equivalent, and since the href() usage is the most frequent one, we store
 568 # the name -> CGI key mapping here, instead of the reverse.
 569 #
 570 # XXX: Warning: If you touch this, check the search form for updating,
 571 # too.
 572
 573 our @cgi_param_mapping = (
 574         project => "p",
 575         action => "a",
 576         file_name => "f",
 577         file_parent => "fp",
 578         hash => "h",
 579         hash_parent => "hp",
 580         hash_base => "hb",
 581         hash_parent_base => "hpb",
 582         page => "pg",
 583         order => "o",
 584         searchtext => "s",
 585         searchtype => "st",
 586         snapshot_format => "sf",
 587         extra_options => "opt",
 588         search_use_regexp => "sr",
 589 );
 590 our %cgi_param_mapping = @cgi_param_mapping;
 591
 592 # we will also need to know the possible actions, for validation
 593 our %actions = (
 594         "blame" => \&git_blame,
 595         "blame_incremental" => \&git_blame_incremental,
 596         "blame_data" => \&git_blame_data,
 597         "blobdiff" => \&git_blobdiff,
 598         "blobdiff_plain" => \&git_blobdiff_plain,
 599         "blob" => \&git_blob,
 600         "blob_plain" => \&git_blob_plain,
 601         "commitdiff" => \&git_commitdiff,
 602         "commitdiff_plain" => \&git_commitdiff_plain,
 603         "commit" => \&git_commit,
 604         "forks" => \&git_forks,
 605         "heads" => \&git_heads,
 606         "history" => \&git_history,
 607         "log" => \&git_log,
 608         "patch" => \&git_patch,
 609         "patches" => \&git_patches,
 610         "rss" => \&git_rss,
 611         "atom" => \&git_atom,
 612         "search" => \&git_search,
 613         "search_help" => \&git_search_help,
 614         "shortlog" => \&git_shortlog,
 615         "summary" => \&git_summary,
 616         "tag" => \&git_tag,
 617         "tags" => \&git_tags,
 618         "tree" => \&git_tree,
 619         "snapshot" => \&git_snapshot,
 620         "object" => \&git_object,
 621         # those below don't need $project
 622         "opml" => \&git_opml,
 623         "project_list" => \&git_project_list,
 624         "project_index" => \&git_project_index,
 625 );
 626
 627 # finally, we have the hash of allowed extra_options for the commands that
 628 # allow them
 629 our %allowed_options = (
 630         "--no-merges" => [ qw(rss atom log shortlog history) ],
 631 );
 632
 633 # fill %input_params with the CGI parameters. All values except for 'opt'
 634 # should be single values, but opt can be an array. We should probably
 635 # build an array of parameters that can be multi-valued, but since for the time
 636 # being it's only this one, we just single it out
 637 while (my ($name, $symbol) = each %cgi_param_mapping) {
 638         if ($symbol eq 'opt') {
 639                 $input_params{$name} = [ $cgi->param($symbol) ];
 640         } else {
 641                 $input_params{$name} = $cgi->param($symbol);
 642         }
 643 }
 644
 645 # now read PATH_INFO and update the parameter list for missing parameters
 646 sub evaluate_path_info {
 647         return if defined $input_params{'project'};
 648         return if !$path_info;
 649         $path_info =~ s,^/+,,;
 650         return if !$path_info;
 651
 652         # find which part of PATH_INFO is project
 653         my $project = $path_info;
 654         $project =~ s,/+$,,;
 655         while ($project && !check_head_link("$projectroot/$project")) {
 656                 $project =~ s,/*[^/]*$,,;
 657         }
 658         return unless $project;
 659         $input_params{'project'} = $project;
 660
 661         # do not change any parameters if an action is given using the query string
 662         return if $input_params{'action'};
 663         $path_info =~ s,^\Q$project\E/*,,;
 664
 665         # next, check if we have an action
 666         my $action = $path_info;
 667         $action =~ s,/.*$,,;
 668         if (exists $actions{$action}) {
 669                 $path_info =~ s,^$action/*,,;
 670                 $input_params{'action'} = $action;
 671         }
 672
 673         # list of actions that want hash_base instead of hash, but can have no
 674         # pathname (f) parameter
 675         my @wants_base = (
 676                 'tree',
 677                 'history',
 678         );
 679
 680         # we want to catch
 681         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 682         my ($parentrefname, $parentpathname, $refname, $pathname) =
 683                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 684
 685         # first, analyze the 'current' part
 686         if (defined $pathname) {
 687                 # we got "branch:filename" or "branch:dir/"
 688                 # we could use git_get_type(branch:pathname), but:
 689                 # - it needs $git_dir
 690                 # - it does a git() call
 691                 # - the convention of terminating directories with a slash
 692                 #   makes it superfluous
 693                 # - embedding the action in the PATH_INFO would make it even
 694                 #   more superfluous
 695                 $pathname =~ s,^/+,,;
 696                 if (!$pathname || substr($pathname, -1) eq "/") {
 697                         $input_params{'action'} ||= "tree";
 698                         $pathname =~ s,/$,,;
 699                 } else {
 700                         # the default action depends on whether we had parent info
 701                         # or not
 702                         if ($parentrefname) {
 703                                 $input_params{'action'} ||= "blobdiff_plain";
 704                         } else {
 705                                 $input_params{'action'} ||= "blob_plain";
 706                         }
 707                 }
 708                 $input_params{'hash_base'} ||= $refname;
 709                 $input_params{'file_name'} ||= $pathname;
 710         } elsif (defined $refname) {
 711                 # we got "branch". In this case we have to choose if we have to
 712                 # set hash or hash_base.
 713                 #
 714                 # Most of the actions without a pathname only want hash to be
 715                 # set, except for the ones specified in @wants_base that want
 716                 # hash_base instead. It should also be noted that hand-crafted
 717                 # links having 'history' as an action and no pathname or hash
 718                 # set will fail, but that happens regardless of PATH_INFO.
 719                 $input_params{'action'} ||= "shortlog";
 720                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 721                         $input_params{'hash_base'} ||= $refname;
 722                 } else {
 723                         $input_params{'hash'} ||= $refname;
 724                 }
 725         }
 726
 727         # next, handle the 'parent' part, if present
 728         if (defined $parentrefname) {
 729                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 730                 # someproject/blobdiff/oldrev..newrev:/filename
 731                 if ($parentpathname) {
 732                         $parentpathname =~ s,^/+,,;
 733                         $parentpathname =~ s,/$,,;
 734                         $input_params{'file_parent'} ||= $parentpathname;
 735                 } else {
 736                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 737                 }
 738                 # we assume that hash_parent_base is wanted if a path was specified,
 739                 # or if the action wants hash_base instead of hash
 740                 if (defined $input_params{'file_parent'} ||
 741                         grep { $_ eq $input_params{'action'} } @wants_base) {
 742                         $input_params{'hash_parent_base'} ||= $parentrefname;
 743                 } else {
 744                         $input_params{'hash_parent'} ||= $parentrefname;
 745                 }
 746         }
 747
 748         # for the snapshot action, we allow URLs in the form
 749         # $project/snapshot/$hash.ext
 750         # where .ext determines the snapshot and gets removed from the
 751         # passed $refname to provide the $hash.
 752         #
 753         # To be able to tell that $refname includes the format extension, we
 754         # require the following two conditions to be satisfied:
 755         # - the hash input parameter MUST have been set from the $refname part
 756         #   of the URL (i.e. they must be equal)
 757         # - the snapshot format MUST NOT have been defined already (e.g. from
 758         #   CGI parameter sf)
 759         # It's also useless to try any matching unless $refname has a dot,
 760         # so we check for that too
 761         if (defined $input_params{'action'} &&
 762                 $input_params{'action'} eq 'snapshot' &&
 763                 defined $refname && index($refname, '.') != -1 &&
 764                 $refname eq $input_params{'hash'} &&
 765                 !defined $input_params{'snapshot_format'}) {
 766                 # We loop over the known snapshot formats, checking for
 767                 # extensions. Allowed extensions are both the defined suffix
 768                 # (which includes the initial dot already) and the snapshot
 769                 # format key itself, with a prepended dot
 770                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 771                         my $hash = $refname;
 772                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 773                                 next;
 774                         }
 775                         my $sfx = $1;
 776                         # a valid suffix was found, so set the snapshot format
 777                         # and reset the hash parameter
 778                         $input_params{'snapshot_format'} = $fmt;
 779                         $input_params{'hash'} = $hash;
 780                         # we also set the format suffix to the one requested
 781                         # in the URL: this way a request for e.g. .tgz returns
 782                         # a .tgz instead of a .tar.gz
 783                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 784                         last;
 785                 }
 786         }
 787 }
 788 evaluate_path_info();
 789
 790 our $action = $input_params{'action'};
 791 if (defined $action) {
 792         if (!validate_action($action)) {
 793                 die_error(400, "Invalid action parameter");
 794         }
 795 }
 796
 797 # parameters which are pathnames
 798 our $project = $input_params{'project'};
 799 if (defined $project) {
 800         if (!validate_project($project)) {
 801                 undef $project;
 802                 die_error(404, "No such project");
 803         }
 804 }
 805
 806 our $file_name = $input_params{'file_name'};
 807 if (defined $file_name) {
 808         if (!validate_pathname($file_name)) {
 809                 die_error(400, "Invalid file parameter");
 810         }
 811 }
 812
 813 our $file_parent = $input_params{'file_parent'};
 814 if (defined $file_parent) {
 815         if (!validate_pathname($file_parent)) {
 816                 die_error(400, "Invalid file parent parameter");
 817         }
 818 }
 819
 820 # parameters which are refnames
 821 our $hash = $input_params{'hash'};
 822 if (defined $hash) {
 823         if (!validate_refname($hash)) {
 824                 die_error(400, "Invalid hash parameter");
 825         }
 826 }
 827
 828 our $hash_parent = $input_params{'hash_parent'};
 829 if (defined $hash_parent) {
 830         if (!validate_refname($hash_parent)) {
 831                 die_error(400, "Invalid hash parent parameter");
 832         }
 833 }
 834
 835 our $hash_base = $input_params{'hash_base'};
 836 if (defined $hash_base) {
 837         if (!validate_refname($hash_base)) {
 838                 die_error(400, "Invalid hash base parameter");
 839         }
 840 }
 841
 842 our @extra_options = @{$input_params{'extra_options'}};
 843 # @extra_options is always defined, since it can only be (currently) set from
 844 # CGI, and $cgi->param() returns the empty array in array context if the param
 845 # is not set
 846 foreach my $opt (@extra_options) {
 847         if (not exists $allowed_options{$opt}) {
 848                 die_error(400, "Invalid option parameter");
 849         }
 850         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 851                 die_error(400, "Invalid option parameter for this action");
 852         }
 853 }
 854
 855 our $hash_parent_base = $input_params{'hash_parent_base'};
 856 if (defined $hash_parent_base) {
 857         if (!validate_refname($hash_parent_base)) {
 858                 die_error(400, "Invalid hash parent base parameter");
 859         }
 860 }
 861
 862 # other parameters
 863 our $page = $input_params{'page'};
 864 if (defined $page) {
 865         if ($page =~ m/[^0-9]/) {
 866                 die_error(400, "Invalid page parameter");
 867         }
 868 }
 869
 870 our $searchtype = $input_params{'searchtype'};
 871 if (defined $searchtype) {
 872         if ($searchtype =~ m/[^a-z]/) {
 873                 die_error(400, "Invalid searchtype parameter");
 874         }
 875 }
 876
 877 our $search_use_regexp = $input_params{'search_use_regexp'};
 878
 879 our $searchtext = $input_params{'searchtext'};
 880 our $search_regexp;
 881 if (defined $searchtext) {
 882         if (length($searchtext) < 2) {
 883                 die_error(403, "At least two characters are required for search parameter");
 884         }
 885         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 886 }
 887
 888 # path to the current git repository
 889 our $git_dir;
 890 $git_dir = "$projectroot/$project" if $project;
 891
 892 # list of supported snapshot formats
 893 our @snapshot_fmts = gitweb_get_feature('snapshot');
 894 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 895
 896 # check that the avatar feature is set to a known provider name,
 897 # and for each provider check if the dependencies are satisfied.
 898 # if the provider name is invalid or the dependencies are not met,
 899 # reset $git_avatar to the empty string.
 900 our ($git_avatar) = gitweb_get_feature('avatar');
 901 if ($git_avatar eq 'gravatar') {
 902         $git_avatar = '' unless (eval { require Digest::MD5; 1; });
 903 } elsif ($git_avatar eq 'picon') {
 904         # no dependencies
 905 } else {
 906         $git_avatar = '';
 907 }
 908
 909 # dispatch
 910 if (!defined $action) {
 911         if (defined $hash) {
 912                 $action = git_get_type($hash);
 913         } elsif (defined $hash_base && defined $file_name) {
 914                 $action = git_get_type("$hash_base:$file_name");
 915         } elsif (defined $project) {
 916                 $action = 'summary';
 917         } else {
 918                 $action = 'project_list';
 919         }
 920 }
 921 if (!defined($actions{$action})) {
 922         die_error(400, "Unknown action");
 923 }
 924 if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
 925     !$project) {
 926         die_error(400, "Project needed");
 927 }
 928 $actions{$action}->();
 929 exit;
 930
 931 ## ======================================================================
 932 ## action links
 933
 934 sub href {
 935         my %params = @_;
 936         # default is to use -absolute url() i.e. $my_uri
 937         my $href = $params{-full} ? $my_url : $my_uri;
 938
 939         $params{'project'} = $project unless exists $params{'project'};
 940
 941         if ($params{-replay}) {
 942                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 943                         if (!exists $params{$name}) {
 944                                 $params{$name} = $input_params{$name};
 945                         }
 946                 }
 947         }
 948
 949         my $use_pathinfo = gitweb_check_feature('pathinfo');
 950         if ($use_pathinfo and defined $params{'project'}) {
 951                 # try to put as many parameters as possible in PATH_INFO:
 952                 #   - project name
 953                 #   - action
 954                 #   - hash_parent or hash_parent_base:/file_parent
 955                 #   - hash or hash_base:/filename
 956                 #   - the snapshot_format as an appropriate suffix
 957
 958                 # When the script is the root DirectoryIndex for the domain,
 959                 # $href here would be something like http://gitweb.example.com/
 960                 # Thus, we strip any trailing / from $href, to spare us double
 961                 # slashes in the final URL
 962                 $href =~ s,/$,,;
 963
 964                 # Then add the project name, if present
 965                 $href .= "/".esc_url($params{'project'});
 966                 delete $params{'project'};
 967
 968                 # since we destructively absorb parameters, we keep this
 969                 # boolean that remembers if we're handling a snapshot
 970                 my $is_snapshot = $params{'action'} eq 'snapshot';
 971
 972                 # Summary just uses the project path URL, any other action is
 973                 # added to the URL
 974                 if (defined $params{'action'}) {
 975                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
 976                         delete $params{'action'};
 977                 }
 978
 979                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
 980                 # stripping nonexistent or useless pieces
 981                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
 982                         || $params{'hash_parent'} || $params{'hash'});
 983                 if (defined $params{'hash_base'}) {
 984                         if (defined $params{'hash_parent_base'}) {
 985                                 $href .= esc_url($params{'hash_parent_base'});
 986                                 # skip the file_parent if it's the same as the file_name
 987                                 if (defined $params{'file_parent'}) {
 988                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
 989                                                 delete $params{'file_parent'};
 990                                         } elsif ($params{'file_parent'} !~ /\.\./) {
 991                                                 $href .= ":/".esc_url($params{'file_parent'});
 992                                                 delete $params{'file_parent'};
 993                                         }
 994                                 }
 995                                 $href .= "..";
 996                                 delete $params{'hash_parent'};
 997                                 delete $params{'hash_parent_base'};
 998                         } elsif (defined $params{'hash_parent'}) {
 999                                 $href .= esc_url($params{'hash_parent'}). "..";
1000                                 delete $params{'hash_parent'};
1001                         }
1002
1003                         $href .= esc_url($params{'hash_base'});
1004                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
1005                                 $href .= ":/".esc_url($params{'file_name'});
1006                                 delete $params{'file_name'};
1007                         }
1008                         delete $params{'hash'};
1009                         delete $params{'hash_base'};
1010                 } elsif (defined $params{'hash'}) {
1011                         $href .= esc_url($params{'hash'});
1012                         delete $params{'hash'};
1013                 }
1014
1015                 # If the action was a snapshot, we can absorb the
1016                 # snapshot_format parameter too
1017                 if ($is_snapshot) {
1018                         my $fmt = $params{'snapshot_format'};
1019                         # snapshot_format should always be defined when href()
1020                         # is called, but just in case some code forgets, we
1021                         # fall back to the default
1022                         $fmt ||= $snapshot_fmts[0];
1023                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
1024                         delete $params{'snapshot_format'};
1025                 }
1026         }
1027
1028         # now encode the parameters explicitly
1029         my @result = ();
1030         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
1031                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
1032                 if (defined $params{$name}) {
1033                         if (ref($params{$name}) eq "ARRAY") {
1034                                 foreach my $par (@{$params{$name}}) {
1035                                         push @result, $symbol . "=" . esc_param($par);
1036                                 }
1037                         } else {
1038                                 push @result, $symbol . "=" . esc_param($params{$name});
1039                         }
1040                 }
1041         }
1042         $href .= "?" . join(';', @result) if $params{-partial_query} or scalar @result;
1043
1044         return $href;
1045 }
1046
1047
1048 ## ======================================================================
1049 ## validation, quoting/unquoting and escaping
1050
1051 sub validate_action {
1052         my $input = shift || return undef;
1053         return undef unless exists $actions{$input};
1054         return $input;
1055 }
1056
1057 sub validate_project {
1058         my $input = shift || return undef;
1059         if (!validate_pathname($input) ||
1060                 !(-d "$projectroot/$input") ||
1061                 !check_export_ok("$projectroot/$input") ||
1062                 ($strict_export && !project_in_list($input))) {
1063                 return undef;
1064         } else {
1065                 return $input;
1066         }
1067 }
1068
1069 sub validate_pathname {
1070         my $input = shift || return undef;
1071
1072         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1073         # at the beginning, at the end, and between slashes.
1074         # also this catches doubled slashes
1075         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1076                 return undef;
1077         }
1078         # no null characters
1079         if ($input =~ m!\0!) {
1080                 return undef;
1081         }
1082         return $input;
1083 }
1084
1085 sub validate_refname {
1086         my $input = shift || return undef;
1087
1088         # textual hashes are O.K.
1089         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1090                 return $input;
1091         }
1092         # it must be correct pathname
1093         $input = validate_pathname($input)
1094                 or return undef;
1095         # restrictions on ref name according to git-check-ref-format
1096         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1097                 return undef;
1098         }
1099         return $input;
1100 }
1101
1102 # decode sequences of octets in utf8 into Perl's internal form,
1103 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1104 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1105 sub to_utf8 {
1106         my $str = shift;
1107         if (utf8::valid($str)) {
1108                 utf8::decode($str);
1109                 return $str;
1110         } else {
1111                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1112         }
1113 }
1114
1115 # quote unsafe chars, but keep the slash, even when it's not
1116 # correct, but quoted slashes look too horrible in bookmarks
1117 sub esc_param {
1118         my $str = shift;
1119         $str =~ s/([^A-Za-z0-9\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1120         $str =~ s/ /\+/g;
1121         return $str;
1122 }
1123
1124 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1125 sub esc_url {
1126         my $str = shift;
1127         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1128         $str =~ s/\+/%2B/g;
1129         $str =~ s/ /\+/g;
1130         return $str;
1131 }
1132
1133 # replace invalid utf8 character with SUBSTITUTION sequence
1134 sub esc_html {
1135         my $str = shift;
1136         my %opts = @_;
1137
1138         $str = to_utf8($str);
1139         $str = $cgi->escapeHTML($str);
1140         if ($opts{'-nbsp'}) {
1141                 $str =~ s/ /&nbsp;/g;
1142         }
1143         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1144         return $str;
1145 }
1146
1147 # quote control characters and escape filename to HTML
1148 sub esc_path {
1149         my $str = shift;
1150         my %opts = @_;
1151
1152         $str = to_utf8($str);
1153         $str = $cgi->escapeHTML($str);
1154         if ($opts{'-nbsp'}) {
1155                 $str =~ s/ /&nbsp;/g;
1156         }
1157         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1158         return $str;
1159 }
1160
1161 # Make control characters "printable", using character escape codes (CEC)
1162 sub quot_cec {
1163         my $cntrl = shift;
1164         my %opts = @_;
1165         my %es = ( # character escape codes, aka escape sequences
1166                 "\t" => '\t',   # tab            (HT)
1167                 "\n" => '\n',   # line feed      (LF)
1168                 "\r" => '\r',   # carrige return (CR)
1169                 "\f" => '\f',   # form feed      (FF)
1170                 "\b" => '\b',   # backspace      (BS)
1171                 "\a" => '\a',   # alarm (bell)   (BEL)
1172                 "\e" => '\e',   # escape         (ESC)
1173                 "\013" => '\v', # vertical tab   (VT)
1174                 "\000" => '\0', # nul character  (NUL)
1175         );
1176         my $chr = ( (exists $es{$cntrl})
1177                     ? $es{$cntrl}
1178                     : sprintf('\%2x', ord($cntrl)) );
1179         if ($opts{-nohtml}) {
1180                 return $chr;
1181         } else {
1182                 return "<span class=\"cntrl\">$chr</span>";
1183         }
1184 }
1185
1186 # Alternatively use unicode control pictures codepoints,
1187 # Unicode "printable representation" (PR)
1188 sub quot_upr {
1189         my $cntrl = shift;
1190         my %opts = @_;
1191
1192         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1193         if ($opts{-nohtml}) {
1194                 return $chr;
1195         } else {
1196                 return "<span class=\"cntrl\">$chr</span>";
1197         }
1198 }
1199
1200 # git may return quoted and escaped filenames
1201 sub unquote {
1202         my $str = shift;
1203
1204         sub unq {
1205                 my $seq = shift;
1206                 my %es = ( # character escape codes, aka escape sequences
1207                         't' => "\t",   # tab            (HT, TAB)
1208                         'n' => "\n",   # newline        (NL)
1209                         'r' => "\r",   # return         (CR)
1210                         'f' => "\f",   # form feed      (FF)
1211                         'b' => "\b",   # backspace      (BS)
1212                         'a' => "\a",   # alarm (bell)   (BEL)
1213                         'e' => "\e",   # escape         (ESC)
1214                         'v' => "\013", # vertical tab   (VT)
1215                 );
1216
1217                 if ($seq =~ m/^[0-7]{1,3}$/) {
1218                         # octal char sequence
1219                         return chr(oct($seq));
1220                 } elsif (exists $es{$seq}) {
1221                         # C escape sequence, aka character escape code
1222                         return $es{$seq};
1223                 }
1224                 # quoted ordinary character
1225                 return $seq;
1226         }
1227
1228         if ($str =~ m/^"(.*)"$/) {
1229                 # needs unquoting
1230                 $str = $1;
1231                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1232         }
1233         return $str;
1234 }
1235
1236 # escape tabs (convert tabs to spaces)
1237 sub untabify {
1238         my $line = shift;
1239
1240         while ((my $pos = index($line, "\t")) != -1) {
1241                 if (my $count = (8 - ($pos % 8))) {
1242                         my $spaces = ' ' x $count;
1243                         $line =~ s/\t/$spaces/;
1244                 }
1245         }
1246
1247         return $line;
1248 }
1249
1250 sub project_in_list {
1251         my $project = shift;
1252         my @list = git_get_projects_list();
1253         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1254 }
1255
1256 ## ----------------------------------------------------------------------
1257 ## HTML aware string manipulation
1258
1259 # Try to chop given string on a word boundary between position
1260 # $len and $len+$add_len. If there is no word boundary there,
1261 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1262 # (marking chopped part) would be longer than given string.
1263 sub chop_str {
1264         my $str = shift;
1265         my $len = shift;
1266         my $add_len = shift || 10;
1267         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1268
1269         # Make sure perl knows it is utf8 encoded so we don't
1270         # cut in the middle of a utf8 multibyte char.
1271         $str = to_utf8($str);
1272
1273         # allow only $len chars, but don't cut a word if it would fit in $add_len
1274         # if it doesn't fit, cut it if it's still longer than the dots we would add
1275         # remove chopped character entities entirely
1276
1277         # when chopping in the middle, distribute $len into left and right part
1278         # return early if chopping wouldn't make string shorter
1279         if ($where eq 'center') {
1280                 return $str if ($len + 5 >= length($str)); # filler is length 5
1281                 $len = int($len/2);
1282         } else {
1283                 return $str if ($len + 4 >= length($str)); # filler is length 4
1284         }
1285
1286         # regexps: ending and beginning with word part up to $add_len
1287         my $endre = qr/.{$len}\w{0,$add_len}/;
1288         my $begre = qr/\w{0,$add_len}.{$len}/;
1289
1290         if ($where eq 'left') {
1291                 $str =~ m/^(.*?)($begre)$/;
1292                 my ($lead, $body) = ($1, $2);
1293                 if (length($lead) > 4) {
1294                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
1295                         $lead = " ...";
1296                 }
1297                 return "$lead$body";
1298
1299         } elsif ($where eq 'center') {
1300                 $str =~ m/^($endre)(.*)$/;
1301                 my ($left, $str)  = ($1, $2);
1302                 $str =~ m/^(.*?)($begre)$/;
1303                 my ($mid, $right) = ($1, $2);
1304                 if (length($mid) > 5) {
1305                         $left  =~ s/&[^;]*$//;
1306                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
1307                         $mid = " ... ";
1308                 }
1309                 return "$left$mid$right";
1310
1311         } else {
1312                 $str =~ m/^($endre)(.*)$/;
1313                 my $body = $1;
1314                 my $tail = $2;
1315                 if (length($tail) > 4) {
1316                         $body =~ s/&[^;]*$//;
1317                         $tail = "... ";
1318                 }
1319                 return "$body$tail";
1320         }
1321 }
1322
1323 # takes the same arguments as chop_str, but also wraps a <span> around the
1324 # result with a title attribute if it does get chopped. Additionally, the
1325 # string is HTML-escaped.
1326 sub chop_and_escape_str {
1327         my ($str) = @_;
1328
1329         my $chopped = chop_str(@_);
1330         if ($chopped eq $str) {
1331                 return esc_html($chopped);
1332         } else {
1333                 $str =~ s/[[:cntrl:]]/?/g;
1334                 return $cgi->span({-title=>$str}, esc_html($chopped));
1335         }
1336 }
1337
1338 ## ----------------------------------------------------------------------
1339 ## functions returning short strings
1340
1341 # CSS class for given age value (in seconds)
1342 sub age_class {
1343         my $age = shift;
1344
1345         if (!defined $age) {
1346                 return "noage";
1347         } elsif ($age < 60*60*2) {
1348                 return "age0";
1349         } elsif ($age < 60*60*24*2) {
1350                 return "age1";
1351         } else {
1352                 return "age2";
1353         }
1354 }
1355
1356 # convert age in seconds to "nn units ago" string
1357 sub age_string {
1358         my $age = shift;
1359         my $age_str;
1360
1361         if ($age > 60*60*24*365*2) {
1362                 $age_str = (int $age/60/60/24/365);
1363                 $age_str .= " years ago";
1364         } elsif ($age > 60*60*24*(365/12)*2) {
1365                 $age_str = int $age/60/60/24/(365/12);
1366                 $age_str .= " months ago";
1367         } elsif ($age > 60*60*24*7*2) {
1368                 $age_str = int $age/60/60/24/7;
1369                 $age_str .= " weeks ago";
1370         } elsif ($age > 60*60*24*2) {
1371                 $age_str = int $age/60/60/24;
1372                 $age_str .= " days ago";
1373         } elsif ($age > 60*60*2) {
1374                 $age_str = int $age/60/60;
1375                 $age_str .= " hours ago";
1376         } elsif ($age > 60*2) {
1377                 $age_str = int $age/60;
1378                 $age_str .= " min ago";
1379         } elsif ($age > 2) {
1380                 $age_str = int $age;
1381                 $age_str .= " sec ago";
1382         } else {
1383                 $age_str .= " right now";
1384         }
1385         return $age_str;
1386 }
1387
1388 use constant {
1389         S_IFINVALID => 0030000,
1390         S_IFGITLINK => 0160000,
1391 };
1392
1393 # submodule/subproject, a commit object reference
1394 sub S_ISGITLINK {
1395         my $mode = shift;
1396
1397         return (($mode & S_IFMT) == S_IFGITLINK)
1398 }
1399
1400 # convert file mode in octal to symbolic file mode string
1401 sub mode_str {
1402         my $mode = oct shift;
1403
1404         if (S_ISGITLINK($mode)) {
1405                 return 'm---------';
1406         } elsif (S_ISDIR($mode & S_IFMT)) {
1407                 return 'drwxr-xr-x';
1408         } elsif (S_ISLNK($mode)) {
1409                 return 'lrwxrwxrwx';
1410         } elsif (S_ISREG($mode)) {
1411                 # git cares only about the executable bit
1412                 if ($mode & S_IXUSR) {
1413                         return '-rwxr-xr-x';
1414                 } else {
1415                         return '-rw-r--r--';
1416                 };
1417         } else {
1418                 return '----------';
1419         }
1420 }
1421
1422 # convert file mode in octal to file type string
1423 sub file_type {
1424         my $mode = shift;
1425
1426         if ($mode !~ m/^[0-7]+$/) {
1427                 return $mode;
1428         } else {
1429                 $mode = oct $mode;
1430         }
1431
1432         if (S_ISGITLINK($mode)) {
1433                 return "submodule";
1434         } elsif (S_ISDIR($mode & S_IFMT)) {
1435                 return "directory";
1436         } elsif (S_ISLNK($mode)) {
1437                 return "symlink";
1438         } elsif (S_ISREG($mode)) {
1439                 return "file";
1440         } else {
1441                 return "unknown";
1442         }
1443 }
1444
1445 # convert file mode in octal to file type description string
1446 sub file_type_long {
1447         my $mode = shift;
1448
1449         if ($mode !~ m/^[0-7]+$/) {
1450                 return $mode;
1451         } else {
1452                 $mode = oct $mode;
1453         }
1454
1455         if (S_ISGITLINK($mode)) {
1456                 return "submodule";
1457         } elsif (S_ISDIR($mode & S_IFMT)) {
1458                 return "directory";
1459         } elsif (S_ISLNK($mode)) {
1460                 return "symlink";
1461         } elsif (S_ISREG($mode)) {
1462                 if ($mode & S_IXUSR) {
1463                         return "executable";
1464                 } else {
1465                         return "file";
1466                 };
1467         } else {
1468                 return "unknown";
1469         }
1470 }
1471
1472
1473 ## ----------------------------------------------------------------------
1474 ## functions returning short HTML fragments, or transforming HTML fragments
1475 ## which don't belong to other sections
1476
1477 # format line of commit message.
1478 sub format_log_line_html {
1479         my $line = shift;
1480
1481         $line = esc_html($line, -nbsp=>1);
1482         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1483                 $cgi->a({-href => href(action=>"object", hash=>$1),
1484                                         -class => "text"}, $1);
1485         }eg;
1486
1487         return $line;
1488 }
1489
1490 # format marker of refs pointing to given object
1491
1492 # the destination action is chosen based on object type and current context:
1493 # - for annotated tags, we choose the tag view unless it's the current view
1494 #   already, in which case we go to shortlog view
1495 # - for other refs, we keep the current view if we're in history, shortlog or
1496 #   log view, and select shortlog otherwise
1497 sub format_ref_marker {
1498         my ($refs, $id) = @_;
1499         my $markers = '';
1500
1501         if (defined $refs->{$id}) {
1502                 foreach my $ref (@{$refs->{$id}}) {
1503                         # this code exploits the fact that non-lightweight tags are the
1504                         # only indirect objects, and that they are the only objects for which
1505                         # we want to use tag instead of shortlog as action
1506                         my ($type, $name) = qw();
1507                         my $indirect = ($ref =~ s/\^\{\}$//);
1508                         # e.g. tags/v2.6.11 or heads/next
1509                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1510                                 $type = $1;
1511                                 $name = $2;
1512                         } else {
1513                                 $type = "ref";
1514                                 $name = $ref;
1515                         }
1516
1517                         my $class = $type;
1518                         $class .= " indirect" if $indirect;
1519
1520                         my $dest_action = "shortlog";
1521
1522                         if ($indirect) {
1523                                 $dest_action = "tag" unless $action eq "tag";
1524                         } elsif ($action =~ /^(history|(short)?log)$/) {
1525                                 $dest_action = $action;
1526                         }
1527
1528                         my $dest = "";
1529                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1530                         $dest .= $ref;
1531
1532                         my $link = $cgi->a({
1533                                 -href => href(
1534                                         action=>$dest_action,
1535                                         hash=>$dest
1536                                 )}, $name);
1537
1538                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1539                                 $link . "</span>";
1540                 }
1541         }
1542
1543         if ($markers) {
1544                 return ' <span class="refs">'. $markers . '</span>';
1545         } else {
1546                 return "";
1547         }
1548 }
1549
1550 # format, perhaps shortened and with markers, title line
1551 sub format_subject_html {
1552         my ($long, $short, $href, $extra) = @_;
1553         $extra = '' unless defined($extra);
1554
1555         if (length($short) < length($long)) {
1556                 $long =~ s/[[:cntrl:]]/?/g;
1557                 return $cgi->a({-href => $href, -class => "list subject",
1558                                 -title => to_utf8($long)},
1559                        esc_html($short)) . $extra;
1560         } else {
1561                 return $cgi->a({-href => $href, -class => "list subject"},
1562                        esc_html($long)) . $extra;
1563         }
1564 }
1565
1566 # Rather than recomputing the url for an email multiple times, we cache it
1567 # after the first hit. This gives a visible benefit in views where the avatar
1568 # for the same email is used repeatedly (e.g. shortlog).
1569 # The cache is shared by all avatar engines (currently gravatar only), which
1570 # are free to use it as preferred. Since only one avatar engine is used for any
1571 # given page, there's no risk for cache conflicts.
1572 our %avatar_cache = ();
1573
1574 # Compute the picon url for a given email, by using the picon search service over at
1575 # http://www.cs.indiana.edu/picons/search.html
1576 sub picon_url {
1577         my $email = lc shift;
1578         if (!$avatar_cache{$email}) {
1579                 my ($user, $domain) = split('@', $email);
1580                 $avatar_cache{$email} =
1581                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1582                         "$domain/$user/" .
1583                         "users+domains+unknown/up/single";
1584         }
1585         return $avatar_cache{$email};
1586 }
1587
1588 # Compute the gravatar url for a given email, if it's not in the cache already.
1589 # Gravatar stores only the part of the URL before the size, since that's the
1590 # one computationally more expensive. This also allows reuse of the cache for
1591 # different sizes (for this particular engine).
1592 sub gravatar_url {
1593         my $email = lc shift;
1594         my $size = shift;
1595         $avatar_cache{$email} ||=
1596                 "http://www.gravatar.com/avatar/" .
1597                         Digest::MD5::md5_hex($email) . "?s=";
1598         return $avatar_cache{$email} . $size;
1599 }
1600
1601 # Insert an avatar for the given $email at the given $size if the feature
1602 # is enabled.
1603 sub git_get_avatar {
1604         my ($email, %opts) = @_;
1605         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1606         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1607         $opts{-size} ||= 'default';
1608         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1609         my $url = "";
1610         if ($git_avatar eq 'gravatar') {
1611                 $url = gravatar_url($email, $size);
1612         } elsif ($git_avatar eq 'picon') {
1613                 $url = picon_url($email);
1614         }
1615         # Other providers can be added by extending the if chain, defining $url
1616         # as needed. If no variant puts something in $url, we assume avatars
1617         # are completely disabled/unavailable.
1618         if ($url) {
1619                 return $pre_white .
1620                        "<img width=\"$size\" " .
1621                             "class=\"avatar\" " .
1622                             "src=\"$url\" " .
1623                             "alt=\"\" " .
1624                        "/>" . $post_white;
1625         } else {
1626                 return "";
1627         }
1628 }
1629
1630 sub format_search_author {
1631         my ($author, $searchtype, $displaytext) = @_;
1632         my $have_search = gitweb_check_feature('search');
1633
1634         if ($have_search) {
1635                 my $performed = "";
1636                 if ($searchtype eq 'author') {
1637                         $performed = "authored";
1638                 } elsif ($searchtype eq 'committer') {
1639                         $performed = "committed";
1640                 }
1641
1642                 return $cgi->a({-href => href(action=>"search", hash=>$hash,
1643                                 searchtext=>$author,
1644                                 searchtype=>$searchtype), class=>"list",
1645                                 title=>"Search for commits $performed by $author"},
1646                                 $displaytext);
1647
1648         } else {
1649                 return $displaytext;
1650         }
1651 }
1652
1653 # format the author name of the given commit with the given tag
1654 # the author name is chopped and escaped according to the other
1655 # optional parameters (see chop_str).
1656 sub format_author_html {
1657         my $tag = shift;
1658         my $co = shift;
1659         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1660         return "<$tag class=\"author\">" .
1661                format_search_author($co->{'author_name'}, "author",
1662                        git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1663                        $author) .
1664                "</$tag>";
1665 }
1666
1667 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1668 sub format_git_diff_header_line {
1669         my $line = shift;
1670         my $diffinfo = shift;
1671         my ($from, $to) = @_;
1672
1673         if ($diffinfo->{'nparents'}) {
1674                 # combined diff
1675                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1676                 if ($to->{'href'}) {
1677                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1678                                          esc_path($to->{'file'}));
1679                 } else { # file was deleted (no href)
1680                         $line .= esc_path($to->{'file'});
1681                 }
1682         } else {
1683                 # "ordinary" diff
1684                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1685                 if ($from->{'href'}) {
1686                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1687                                          'a/' . esc_path($from->{'file'}));
1688                 } else { # file was added (no href)
1689                         $line .= 'a/' . esc_path($from->{'file'});
1690                 }
1691                 $line .= ' ';
1692                 if ($to->{'href'}) {
1693                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1694                                          'b/' . esc_path($to->{'file'}));
1695                 } else { # file was deleted
1696                         $line .= 'b/' . esc_path($to->{'file'});
1697                 }
1698         }
1699
1700         return "<div class=\"diff header\">$line</div>\n";
1701 }
1702
1703 # format extended diff header line, before patch itself
1704 sub format_extended_diff_header_line {
1705         my $line = shift;
1706         my $diffinfo = shift;
1707         my ($from, $to) = @_;
1708
1709         # match <path>
1710         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1711                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1712                                        esc_path($from->{'file'}));
1713         }
1714         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1715                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1716                                  esc_path($to->{'file'}));
1717         }
1718         # match single <mode>
1719         if ($line =~ m/\s(\d{6})$/) {
1720                 $line .= '<span class="info"> (' .
1721                          file_type_long($1) .
1722                          ')</span>';
1723         }
1724         # match <hash>
1725         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1726                 # can match only for combined diff
1727                 $line = 'index ';
1728                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1729                         if ($from->{'href'}[$i]) {
1730                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1731                                                   -class=>"hash"},
1732                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1733                         } else {
1734                                 $line .= '0' x 7;
1735                         }
1736                         # separator
1737                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1738                 }
1739                 $line .= '..';
1740                 if ($to->{'href'}) {
1741                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1742                                          substr($diffinfo->{'to_id'},0,7));
1743                 } else {
1744                         $line .= '0' x 7;
1745                 }
1746
1747         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1748                 # can match only for ordinary diff
1749                 my ($from_link, $to_link);
1750                 if ($from->{'href'}) {
1751                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1752                                              substr($diffinfo->{'from_id'},0,7));
1753                 } else {
1754                         $from_link = '0' x 7;
1755                 }
1756                 if ($to->{'href'}) {
1757                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1758                                            substr($diffinfo->{'to_id'},0,7));
1759                 } else {
1760                         $to_link = '0' x 7;
1761                 }
1762                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1763                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1764         }
1765
1766         return $line . "<br/>\n";
1767 }
1768
1769 # format from-file/to-file diff header
1770 sub format_diff_from_to_header {
1771         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1772         my $line;
1773         my $result = '';
1774
1775         $line = $from_line;
1776         #assert($line =~ m/^---/) if DEBUG;
1777         # no extra formatting for "^--- /dev/null"
1778         if (! $diffinfo->{'nparents'}) {
1779                 # ordinary (single parent) diff
1780                 if ($line =~ m!^--- "?a/!) {
1781                         if ($from->{'href'}) {
1782                                 $line = '--- a/' .
1783                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1784                                                 esc_path($from->{'file'}));
1785                         } else {
1786                                 $line = '--- a/' .
1787                                         esc_path($from->{'file'});
1788                         }
1789                 }
1790                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1791
1792         } else {
1793                 # combined diff (merge commit)
1794                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1795                         if ($from->{'href'}[$i]) {
1796                                 $line = '--- ' .
1797                                         $cgi->a({-href=>href(action=>"blobdiff",
1798                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1799                                                              hash_parent_base=>$parents[$i],
1800                                                              file_parent=>$from->{'file'}[$i],
1801                                                              hash=>$diffinfo->{'to_id'},
1802                                                              hash_base=>$hash,
1803                                                              file_name=>$to->{'file'}),
1804                                                  -class=>"path",
1805                                                  -title=>"diff" . ($i+1)},
1806                                                 $i+1) .
1807                                         '/' .
1808                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1809                                                 esc_path($from->{'file'}[$i]));
1810                         } else {
1811                                 $line = '--- /dev/null';
1812                         }
1813                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1814                 }
1815         }
1816
1817         $line = $to_line;
1818         #assert($line =~ m/^\+\+\+/) if DEBUG;
1819         # no extra formatting for "^+++ /dev/null"
1820         if ($line =~ m!^\+\+\+ "?b/!) {
1821                 if ($to->{'href'}) {
1822                         $line = '+++ b/' .
1823                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1824                                         esc_path($to->{'file'}));
1825                 } else {
1826                         $line = '+++ b/' .
1827                                 esc_path($to->{'file'});
1828                 }
1829         }
1830         $result .= qq!<div class="diff to_file">$line</div>\n!;
1831
1832         return $result;
1833 }
1834
1835 # create note for patch simplified by combined diff
1836 sub format_diff_cc_simplified {
1837         my ($diffinfo, @parents) = @_;
1838         my $result = '';
1839
1840         $result .= "<div class=\"diff header\">" .
1841                    "diff --cc ";
1842         if (!is_deleted($diffinfo)) {
1843                 $result .= $cgi->a({-href => href(action=>"blob",
1844                                                   hash_base=>$hash,
1845                                                   hash=>$diffinfo->{'to_id'},
1846                                                   file_name=>$diffinfo->{'to_file'}),
1847                                     -class => "path"},
1848                                    esc_path($diffinfo->{'to_file'}));
1849         } else {
1850                 $result .= esc_path($diffinfo->{'to_file'});
1851         }
1852         $result .= "</div>\n" . # class="diff header"
1853                    "<div class=\"diff nodifferences\">" .
1854                    "Simple merge" .
1855                    "</div>\n"; # class="diff nodifferences"
1856
1857         return $result;
1858 }
1859
1860 # format patch (diff) line (not to be used for diff headers)
1861 sub format_diff_line {
1862         my $line = shift;
1863         my ($from, $to) = @_;
1864         my $diff_class = "";
1865
1866         chomp $line;
1867
1868         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1869                 # combined diff
1870                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1871                 if ($line =~ m/^\@{3}/) {
1872                         $diff_class = " chunk_header";
1873                 } elsif ($line =~ m/^\\/) {
1874                         $diff_class = " incomplete";
1875                 } elsif ($prefix =~ tr/+/+/) {
1876                         $diff_class = " add";
1877                 } elsif ($prefix =~ tr/-/-/) {
1878                         $diff_class = " rem";
1879                 }
1880         } else {
1881                 # assume ordinary diff
1882                 my $char = substr($line, 0, 1);
1883                 if ($char eq '+') {
1884                         $diff_class = " add";
1885                 } elsif ($char eq '-') {
1886                         $diff_class = " rem";
1887                 } elsif ($char eq '@') {
1888                         $diff_class = " chunk_header";
1889                 } elsif ($char eq "\\") {
1890                         $diff_class = " incomplete";
1891                 }
1892         }
1893         $line = untabify($line);
1894         if ($from && $to && $line =~ m/^\@{2} /) {
1895                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1896                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1897
1898                 $from_lines = 0 unless defined $from_lines;
1899                 $to_lines   = 0 unless defined $to_lines;
1900
1901                 if ($from->{'href'}) {
1902                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1903                                              -class=>"list"}, $from_text);
1904                 }
1905                 if ($to->{'href'}) {
1906                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1907                                              -class=>"list"}, $to_text);
1908                 }
1909                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1910                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1911                 return "<div class=\"diff$diff_class\">$line</div>\n";
1912         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1913                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1914                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1915
1916                 @from_text = split(' ', $ranges);
1917                 for (my $i = 0; $i < @from_text; ++$i) {
1918                         ($from_start[$i], $from_nlines[$i]) =
1919                                 (split(',', substr($from_text[$i], 1)), 0);
1920                 }
1921
1922                 $to_text   = pop @from_text;
1923                 $to_start  = pop @from_start;
1924                 $to_nlines = pop @from_nlines;
1925
1926                 $line = "<span class=\"chunk_info\">$prefix ";
1927                 for (my $i = 0; $i < @from_text; ++$i) {
1928                         if ($from->{'href'}[$i]) {
1929                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1930                                                   -class=>"list"}, $from_text[$i]);
1931                         } else {
1932                                 $line .= $from_text[$i];
1933                         }
1934                         $line .= " ";
1935                 }
1936                 if ($to->{'href'}) {
1937                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1938                                           -class=>"list"}, $to_text);
1939                 } else {
1940                         $line .= $to_text;
1941                 }
1942                 $line .= " $prefix</span>" .
1943                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1944                 return "<div class=\"diff$diff_class\">$line</div>\n";
1945         }
1946         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1947 }
1948
1949 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1950 # linked.  Pass the hash of the tree/commit to snapshot.
1951 sub format_snapshot_links {
1952         my ($hash) = @_;
1953         my $num_fmts = @snapshot_fmts;
1954         if ($num_fmts > 1) {
1955                 # A parenthesized list of links bearing format names.
1956                 # e.g. "snapshot (_tar.gz_ _zip_)"
1957                 return "snapshot (" . join(' ', map
1958                         $cgi->a({
1959                                 -href => href(
1960                                         action=>"snapshot",
1961                                         hash=>$hash,
1962                                         snapshot_format=>$_
1963                                 )
1964                         }, $known_snapshot_formats{$_}{'display'})
1965                 , @snapshot_fmts) . ")";
1966         } elsif ($num_fmts == 1) {
1967                 # A single "snapshot" link whose tooltip bears the format name.
1968                 # i.e. "_snapshot_"
1969                 my ($fmt) = @snapshot_fmts;
1970                 return
1971                         $cgi->a({
1972                                 -href => href(
1973                                         action=>"snapshot",
1974                                         hash=>$hash,
1975                                         snapshot_format=>$fmt
1976                                 ),
1977                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1978                         }, "snapshot");
1979         } else { # $num_fmts == 0
1980                 return undef;
1981         }
1982 }
1983
1984 ## ......................................................................
1985 ## functions returning values to be passed, perhaps after some
1986 ## transformation, to other functions; e.g. returning arguments to href()
1987
1988 # returns hash to be passed to href to generate gitweb URL
1989 # in -title key it returns description of link
1990 sub get_feed_info {
1991         my $format = shift || 'Atom';
1992         my %res = (action => lc($format));
1993
1994         # feed links are possible only for project views
1995         return unless (defined $project);
1996         # some views should link to OPML, or to generic project feed,
1997         # or don't have specific feed yet (so they should use generic)
1998         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1999
2000         my $branch;
2001         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
2002         # from tag links; this also makes possible to detect branch links
2003         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
2004             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
2005                 $branch = $1;
2006         }
2007         # find log type for feed description (title)
2008         my $type = 'log';
2009         if (defined $file_name) {
2010                 $type  = "history of $file_name";
2011                 $type .= "/" if ($action eq 'tree');
2012                 $type .= " on '$branch'" if (defined $branch);
2013         } else {
2014                 $type = "log of $branch" if (defined $branch);
2015         }
2016
2017         $res{-title} = $type;
2018         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
2019         $res{'file_name'} = $file_name;
2020
2021         return %res;
2022 }
2023
2024 ## ----------------------------------------------------------------------
2025 ## git utility subroutines, invoking git commands
2026
2027 # returns path to the core git executable and the --git-dir parameter as list
2028 sub git_cmd {
2029         return $GIT, '--git-dir='.$git_dir;
2030 }
2031
2032 # quote the given arguments for passing them to the shell
2033 # quote_command("command", "arg 1", "arg with ' and ! characters")
2034 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
2035 # Try to avoid using this function wherever possible.
2036 sub quote_command {
2037         return join(' ',
2038                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
2039 }
2040
2041 # get HEAD ref of given project as hash
2042 sub git_get_head_hash {
2043         my $project = shift;
2044         my $o_git_dir = $git_dir;
2045         my $retval = undef;
2046         $git_dir = "$projectroot/$project";
2047         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
2048                 my $head = <$fd>;
2049                 close $fd;
2050                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
2051                         $retval = $1;
2052                 }
2053         }
2054         if (defined $o_git_dir) {
2055                 $git_dir = $o_git_dir;
2056         }
2057         return $retval;
2058 }
2059
2060 # get type of given object
2061 sub git_get_type {
2062         my $hash = shift;
2063
2064         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2065         my $type = <$fd>;
2066         close $fd or return;
2067         chomp $type;
2068         return $type;
2069 }
2070
2071 # repository configuration
2072 our $config_file = '';
2073 our %config;
2074
2075 # store multiple values for single key as anonymous array reference
2076 # single values stored directly in the hash, not as [ <value> ]
2077 sub hash_set_multi {
2078         my ($hash, $key, $value) = @_;
2079
2080         if (!exists $hash->{$key}) {
2081                 $hash->{$key} = $value;
2082         } elsif (!ref $hash->{$key}) {
2083                 $hash->{$key} = [ $hash->{$key}, $value ];
2084         } else {
2085                 push @{$hash->{$key}}, $value;
2086         }
2087 }
2088
2089 # return hash of git project configuration
2090 # optionally limited to some section, e.g. 'gitweb'
2091 sub git_parse_project_config {
2092         my $section_regexp = shift;
2093         my %config;
2094
2095         local $/ = "\0";
2096
2097         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2098                 or return;
2099
2100         while (my $keyval = <$fh>) {
2101                 chomp $keyval;
2102                 my ($key, $value) = split(/\n/, $keyval, 2);
2103
2104                 hash_set_multi(\%config, $key, $value)
2105                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2106         }
2107         close $fh;
2108
2109         return %config;
2110 }
2111
2112 # convert config value to boolean: 'true' or 'false'
2113 # no value, number > 0, 'true' and 'yes' values are true
2114 # rest of values are treated as false (never as error)
2115 sub config_to_bool {
2116         my $val = shift;
2117
2118         return 1 if !defined $val;             # section.key
2119
2120         # strip leading and trailing whitespace
2121         $val =~ s/^\s+//;
2122         $val =~ s/\s+$//;
2123
2124         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2125                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2126 }
2127
2128 # convert config value to simple decimal number
2129 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2130 # to be multiplied by 1024, 1048576, or 1073741824
2131 sub config_to_int {
2132         my $val = shift;
2133
2134         # strip leading and trailing whitespace
2135         $val =~ s/^\s+//;
2136         $val =~ s/\s+$//;
2137
2138         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2139                 $unit = lc($unit);
2140                 # unknown unit is treated as 1
2141                 return $num * ($unit eq 'g' ? 1073741824 :
2142                                $unit eq 'm' ?    1048576 :
2143                                $unit eq 'k' ?       1024 : 1);
2144         }
2145         return $val;
2146 }
2147
2148 # convert config value to array reference, if needed
2149 sub config_to_multi {
2150         my $val = shift;
2151
2152         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2153 }
2154
2155 sub git_get_project_config {
2156         my ($key, $type) = @_;
2157
2158         # key sanity check
2159         return unless ($key);
2160         $key =~ s/^gitweb\.//;
2161         return if ($key =~ m/\W/);
2162
2163         # type sanity check
2164         if (defined $type) {
2165                 $type =~ s/^--//;
2166                 $type = undef
2167                         unless ($type eq 'bool' || $type eq 'int');
2168         }
2169
2170         # get config
2171         if (!defined $config_file ||
2172             $config_file ne "$git_dir/config") {
2173                 %config = git_parse_project_config('gitweb');
2174                 $config_file = "$git_dir/config";
2175         }
2176
2177         # check if config variable (key) exists
2178         return unless exists $config{"gitweb.$key"};
2179
2180         # ensure given type
2181         if (!defined $type) {
2182                 return $config{"gitweb.$key"};
2183         } elsif ($type eq 'bool') {
2184                 # backward compatibility: 'git config --bool' returns true/false
2185                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2186         } elsif ($type eq 'int') {
2187                 return config_to_int($config{"gitweb.$key"});
2188         }
2189         return $config{"gitweb.$key"};
2190 }
2191
2192 # get hash of given path at given ref
2193 sub git_get_hash_by_path {
2194         my $base = shift;
2195         my $path = shift || return undef;
2196         my $type = shift;
2197
2198         $path =~ s,/+$,,;
2199
2200         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2201                 or die_error(500, "Open git-ls-tree failed");
2202         my $line = <$fd>;
2203         close $fd or return undef;
2204
2205         if (!defined $line) {
2206                 # there is no tree or hash given by $path at $base
2207                 return undef;
2208         }
2209
2210         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2211         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2212         if (defined $type && $type ne $2) {
2213                 # type doesn't match
2214                 return undef;
2215         }
2216         return $3;
2217 }
2218
2219 # get path of entry with given hash at given tree-ish (ref)
2220 # used to get 'from' filename for combined diff (merge commit) for renames
2221 sub git_get_path_by_hash {
2222         my $base = shift || return;
2223         my $hash = shift || return;
2224
2225         local $/ = "\0";
2226
2227         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2228                 or return undef;
2229         while (my $line = <$fd>) {
2230                 chomp $line;
2231
2232                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2233                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2234                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2235                         close $fd;
2236                         return $1;
2237                 }
2238         }
2239         close $fd;
2240         return undef;
2241 }
2242
2243 ## ......................................................................
2244 ## git utility functions, directly accessing git repository
2245
2246 sub git_get_project_description {
2247         my $path = shift;
2248
2249         $git_dir = "$projectroot/$path";
2250         open my $fd, '<', "$git_dir/description"
2251                 or return git_get_project_config('description');
2252         my $descr = <$fd>;
2253         close $fd;
2254         if (defined $descr) {
2255                 chomp $descr;
2256         }
2257         return $descr;
2258 }
2259
2260 sub git_get_project_ctags {
2261         my $path = shift;
2262         my $ctags = {};
2263
2264         $git_dir = "$projectroot/$path";
2265         opendir my $dh, "$git_dir/ctags"
2266                 or return $ctags;
2267         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2268                 open my $ct, '<', $_ or next;
2269                 my $val = <$ct>;
2270                 chomp $val;
2271                 close $ct;
2272                 my $ctag = $_; $ctag =~ s#.*/##;
2273                 $ctags->{$ctag} = $val;
2274         }
2275         closedir $dh;
2276         $ctags;
2277 }
2278
2279 sub git_populate_project_tagcloud {
2280         my $ctags = shift;
2281
2282         # First, merge different-cased tags; tags vote on casing
2283         my %ctags_lc;
2284         foreach (keys %$ctags) {
2285                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2286                 if (not $ctags_lc{lc $_}->{topcount}
2287                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2288                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2289                         $ctags_lc{lc $_}->{topname} = $_;
2290                 }
2291         }
2292
2293         my $cloud;
2294         if (eval { require HTML::TagCloud; 1; }) {
2295                 $cloud = HTML::TagCloud->new;
2296                 foreach (sort keys %ctags_lc) {
2297                         # Pad the title with spaces so that the cloud looks
2298                         # less crammed.
2299                         my $title = $ctags_lc{$_}->{topname};
2300                         $title =~ s/ /&nbsp;/g;
2301                         $title =~ s/^/&nbsp;/g;
2302                         $title =~ s/$/&nbsp;/g;
2303                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2304                 }
2305         } else {
2306                 $cloud = \%ctags_lc;
2307         }
2308         $cloud;
2309 }
2310
2311 sub git_show_project_tagcloud {
2312         my ($cloud, $count) = @_;
2313         print STDERR ref($cloud)."..\n";
2314         if (ref $cloud eq 'HTML::TagCloud') {
2315                 return $cloud->html_and_css($count);
2316         } else {
2317                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2318                 return '<p align="center">' . join (', ', map {
2319                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2320                 } splice(@tags, 0, $count)) . '</p>';
2321         }
2322 }
2323
2324 sub git_get_project_url_list {
2325         my $path = shift;
2326
2327         $git_dir = "$projectroot/$path";
2328         open my $fd, '<', "$git_dir/cloneurl"
2329                 or return wantarray ?
2330                 @{ config_to_multi(git_get_project_config('url')) } :
2331                    config_to_multi(git_get_project_config('url'));
2332         my @git_project_url_list = map { chomp; $_ } <$fd>;
2333         close $fd;
2334
2335         return wantarray ? @git_project_url_list : \@git_project_url_list;
2336 }
2337
2338 sub git_get_projects_list {
2339         my ($filter) = @_;
2340         my @list;
2341
2342         $filter ||= '';
2343         $filter =~ s/\.git$//;
2344
2345         my $check_forks = gitweb_check_feature('forks');
2346
2347         if (-d $projects_list) {
2348                 # search in directory
2349                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2350                 # remove the trailing "/"
2351                 $dir =~ s!/+$!!;
2352                 my $pfxlen = length("$dir");
2353                 my $pfxdepth = ($dir =~ tr!/!!);
2354
2355                 File::Find::find({
2356                         follow_fast => 1, # follow symbolic links
2357                         follow_skip => 2, # ignore duplicates
2358                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2359                         wanted => sub {
2360                                 # skip project-list toplevel, if we get it.
2361                                 return if (m!^[/.]$!);
2362                                 # only directories can be git repositories
2363                                 return unless (-d $_);
2364                                 # don't traverse too deep (Find is super slow on os x)
2365                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2366                                         $File::Find::prune = 1;
2367                                         return;
2368                                 }
2369
2370                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2371                                 # we check related file in $projectroot
2372                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2373                                 if (check_export_ok("$projectroot/$path")) {
2374                                         push @list, { path => $path };
2375                                         $File::Find::prune = 1;
2376                                 }
2377                         },
2378                 }, "$dir");
2379
2380         } elsif (-f $projects_list) {
2381                 # read from file(url-encoded):
2382                 # 'git%2Fgit.git Linus+Torvalds'
2383                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2384                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2385                 my %paths;
2386                 open my $fd, '<', $projects_list or return;
2387         PROJECT:
2388                 while (my $line = <$fd>) {
2389                         chomp $line;
2390                         my ($path, $owner) = split ' ', $line;
2391                         $path = unescape($path);
2392                         $owner = unescape($owner);
2393                         if (!defined $path) {
2394                                 next;
2395                         }
2396                         if ($filter ne '') {
2397                                 # looking for forks;
2398                                 my $pfx = substr($path, 0, length($filter));
2399                                 if ($pfx ne $filter) {
2400                                         next PROJECT;
2401                                 }
2402                                 my $sfx = substr($path, length($filter));
2403                                 if ($sfx !~ /^\/.*\.git$/) {
2404                                         next PROJECT;
2405                                 }
2406                         } elsif ($check_forks) {
2407                         PATH:
2408                                 foreach my $filter (keys %paths) {
2409                                         # looking for forks;
2410                                         my $pfx = substr($path, 0, length($filter));
2411                                         if ($pfx ne $filter) {
2412                                                 next PATH;
2413                                         }
2414                                         my $sfx = substr($path, length($filter));
2415                                         if ($sfx !~ /^\/.*\.git$/) {
2416                                                 next PATH;
2417                                         }
2418                                         # is a fork, don't include it in
2419                                         # the list
2420                                         next PROJECT;
2421                                 }
2422                         }
2423                         if (check_export_ok("$projectroot/$path")) {
2424                                 my $pr = {
2425                                         path => $path,
2426                                         owner => to_utf8($owner),
2427                                 };
2428                                 push @list, $pr;
2429                                 (my $forks_path = $path) =~ s/\.git$//;
2430                                 $paths{$forks_path}++;
2431                         }
2432                 }
2433                 close $fd;
2434         }
2435         return @list;
2436 }
2437
2438 our $gitweb_project_owner = undef;
2439 sub git_get_project_list_from_file {
2440
2441         return if (defined $gitweb_project_owner);
2442
2443         $gitweb_project_owner = {};
2444         # read from file (url-encoded):
2445         # 'git%2Fgit.git Linus+Torvalds'
2446         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2447         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2448         if (-f $projects_list) {
2449                 open(my $fd, '<', $projects_list);
2450                 while (my $line = <$fd>) {
2451                         chomp $line;
2452                         my ($pr, $ow) = split ' ', $line;
2453                         $pr = unescape($pr);
2454                         $ow = unescape($ow);
2455                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2456                 }
2457                 close $fd;
2458         }
2459 }
2460
2461 sub git_get_project_owner {
2462         my $project = shift;
2463         my $owner;
2464
2465         return undef unless $project;
2466         $git_dir = "$projectroot/$project";
2467
2468         if (!defined $gitweb_project_owner) {
2469                 git_get_project_list_from_file();
2470         }
2471
2472         if (exists $gitweb_project_owner->{$project}) {
2473                 $owner = $gitweb_project_owner->{$project};
2474         }
2475         if (!defined $owner){
2476                 $owner = git_get_project_config('owner');
2477         }
2478         if (!defined $owner) {
2479                 $owner = get_file_owner("$git_dir");
2480         }
2481
2482         return $owner;
2483 }
2484
2485 sub git_get_last_activity {
2486         my ($path) = @_;
2487         my $fd;
2488
2489         $git_dir = "$projectroot/$path";
2490         open($fd, "-|", git_cmd(), 'for-each-ref',
2491              '--format=%(committer)',
2492              '--sort=-committerdate',
2493              '--count=1',
2494              'refs/heads') or return;
2495         my $most_recent = <$fd>;
2496         close $fd or return;
2497         if (defined $most_recent &&
2498             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2499                 my $timestamp = $1;
2500                 my $age = time - $timestamp;
2501                 return ($age, age_string($age));
2502         }
2503         return (undef, undef);
2504 }
2505
2506 sub git_get_references {
2507         my $type = shift || "";
2508         my %refs;
2509         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2510         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2511         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2512                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2513                 or return;
2514
2515         while (my $line = <$fd>) {
2516                 chomp $line;
2517                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2518                         if (defined $refs{$1}) {
2519                                 push @{$refs{$1}}, $2;
2520                         } else {
2521                                 $refs{$1} = [ $2 ];
2522                         }
2523                 }
2524         }
2525         close $fd or return;
2526         return \%refs;
2527 }
2528
2529 sub git_get_rev_name_tags {
2530         my $hash = shift || return undef;
2531
2532         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2533                 or return;
2534         my $name_rev = <$fd>;
2535         close $fd;
2536
2537         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2538                 return $1;
2539         } else {
2540                 # catches also '$hash undefined' output
2541                 return undef;
2542         }
2543 }
2544
2545 ## ----------------------------------------------------------------------
2546 ## parse to hash functions
2547
2548 sub parse_date {
2549         my $epoch = shift;
2550         my $tz = shift || "-0000";
2551
2552         my %date;
2553         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2554         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2555         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2556         $date{'hour'} = $hour;
2557         $date{'minute'} = $min;
2558         $date{'mday'} = $mday;
2559         $date{'day'} = $days[$wday];
2560         $date{'month'} = $months[$mon];
2561         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2562                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2563         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2564                              $mday, $months[$mon], $hour ,$min;
2565         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2566                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2567
2568         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2569         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2570         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2571         $date{'hour_local'} = $hour;
2572         $date{'minute_local'} = $min;
2573         $date{'tz_local'} = $tz;
2574         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2575                                   1900+$year, $mon+1, $mday,
2576                                   $hour, $min, $sec, $tz);
2577         return %date;
2578 }
2579
2580 sub parse_tag {
2581         my $tag_id = shift;
2582         my %tag;
2583         my @comment;
2584
2585         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2586         $tag{'id'} = $tag_id;
2587         while (my $line = <$fd>) {
2588                 chomp $line;
2589                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2590                         $tag{'object'} = $1;
2591                 } elsif ($line =~ m/^type (.+)$/) {
2592                         $tag{'type'} = $1;
2593                 } elsif ($line =~ m/^tag (.+)$/) {
2594                         $tag{'name'} = $1;
2595                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2596                         $tag{'author'} = $1;
2597                         $tag{'author_epoch'} = $2;
2598                         $tag{'author_tz'} = $3;
2599                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2600                                 $tag{'author_name'}  = $1;
2601                                 $tag{'author_email'} = $2;
2602                         } else {
2603                                 $tag{'author_name'} = $tag{'author'};
2604                         }
2605                 } elsif ($line =~ m/--BEGIN/) {
2606                         push @comment, $line;
2607                         last;
2608                 } elsif ($line eq "") {
2609                         last;
2610                 }
2611         }
2612         push @comment, <$fd>;
2613         $tag{'comment'} = \@comment;
2614         close $fd or return;
2615         if (!defined $tag{'name'}) {
2616                 return
2617         };
2618         return %tag
2619 }
2620
2621 sub parse_commit_text {
2622         my ($commit_text, $withparents) = @_;
2623         my @commit_lines = split '\n', $commit_text;
2624         my %co;
2625
2626         pop @commit_lines; # Remove '\0'
2627
2628         if (! @commit_lines) {
2629                 return;
2630         }
2631
2632         my $header = shift @commit_lines;
2633         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2634                 return;
2635         }
2636         ($co{'id'}, my @parents) = split ' ', $header;
2637         while (my $line = shift @commit_lines) {
2638                 last if $line eq "\n";
2639                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2640                         $co{'tree'} = $1;
2641                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2642                         push @parents, $1;
2643                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2644                         $co{'author'} = to_utf8($1);
2645                         $co{'author_epoch'} = $2;
2646                         $co{'author_tz'} = $3;
2647                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2648                                 $co{'author_name'}  = $1;
2649                                 $co{'author_email'} = $2;
2650                         } else {
2651                                 $co{'author_name'} = $co{'author'};
2652                         }
2653                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2654                         $co{'committer'} = to_utf8($1);
2655                         $co{'committer_epoch'} = $2;
2656                         $co{'committer_tz'} = $3;
2657                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2658                                 $co{'committer_name'}  = $1;
2659                                 $co{'committer_email'} = $2;
2660                         } else {
2661                                 $co{'committer_name'} = $co{'committer'};
2662                         }
2663                 }
2664         }
2665         if (!defined $co{'tree'}) {
2666                 return;
2667         };
2668         $co{'parents'} = \@parents;
2669         $co{'parent'} = $parents[0];
2670
2671         foreach my $title (@commit_lines) {
2672                 $title =~ s/^    //;
2673                 if ($title ne "") {
2674                         $co{'title'} = chop_str($title, 80, 5);
2675                         # remove leading stuff of merges to make the interesting part visible
2676                         if (length($title) > 50) {
2677                                 $title =~ s/^Automatic //;
2678                                 $title =~ s/^merge (of|with) /Merge ... /i;
2679                                 if (length($title) > 50) {
2680                                         $title =~ s/(http|rsync):\/\///;
2681                                 }
2682                                 if (length($title) > 50) {
2683                                         $title =~ s/(master|www|rsync)\.//;
2684                                 }
2685                                 if (length($title) > 50) {
2686                                         $title =~ s/kernel.org:?//;
2687                                 }
2688                                 if (length($title) > 50) {
2689                                         $title =~ s/\/pub\/scm//;
2690                                 }
2691                         }
2692                         $co{'title_short'} = chop_str($title, 50, 5);
2693                         last;
2694                 }
2695         }
2696         if (! defined $co{'title'} || $co{'title'} eq "") {
2697                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2698         }
2699         # remove added spaces
2700         foreach my $line (@commit_lines) {
2701                 $line =~ s/^    //;
2702         }
2703         $co{'comment'} = \@commit_lines;
2704
2705         my $age = time - $co{'committer_epoch'};
2706         $co{'age'} = $age;
2707         $co{'age_string'} = age_string($age);
2708         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2709         if ($age > 60*60*24*7*2) {
2710                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2711                 $co{'age_string_age'} = $co{'age_string'};
2712         } else {
2713                 $co{'age_string_date'} = $co{'age_string'};
2714                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2715         }
2716         return %co;
2717 }
2718
2719 sub parse_commit {
2720         my ($commit_id) = @_;
2721         my %co;
2722
2723         local $/ = "\0";
2724
2725         open my $fd, "-|", git_cmd(), "rev-list",
2726                 "--parents",
2727                 "--header",
2728                 "--max-count=1",
2729                 $commit_id,
2730                 "--",
2731                 or die_error(500, "Open git-rev-list failed");
2732         %co = parse_commit_text(<$fd>, 1);
2733         close $fd;
2734
2735         return %co;
2736 }
2737
2738 sub parse_commits {
2739         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2740         my @cos;
2741
2742         $maxcount ||= 1;
2743         $skip ||= 0;
2744
2745         local $/ = "\0";
2746
2747         open my $fd, "-|", git_cmd(), "rev-list",
2748                 "--header",
2749                 @args,
2750                 ("--max-count=" . $maxcount),
2751                 ("--skip=" . $skip),
2752                 @extra_options,
2753                 $commit_id,
2754                 "--",
2755                 ($filename ? ($filename) : ())
2756                 or die_error(500, "Open git-rev-list failed");
2757         while (my $line = <$fd>) {
2758                 my %co = parse_commit_text($line);
2759                 push @cos, \%co;
2760         }
2761         close $fd;
2762
2763         return wantarray ? @cos : \@cos;
2764 }
2765
2766 # parse line of git-diff-tree "raw" output
2767 sub parse_difftree_raw_line {
2768         my $line = shift;
2769         my %res;
2770
2771         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2772         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2773         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2774                 $res{'from_mode'} = $1;
2775                 $res{'to_mode'} = $2;
2776                 $res{'from_id'} = $3;
2777                 $res{'to_id'} = $4;
2778                 $res{'status'} = $5;
2779                 $res{'similarity'} = $6;
2780                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2781                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2782                 } else {
2783                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2784                 }
2785         }
2786         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2787         # combined diff (for merge commit)
2788         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2789                 $res{'nparents'}  = length($1);
2790                 $res{'from_mode'} = [ split(' ', $2) ];
2791                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2792                 $res{'from_id'} = [ split(' ', $3) ];
2793                 $res{'to_id'} = pop @{$res{'from_id'}};
2794                 $res{'status'} = [ split('', $4) ];
2795                 $res{'to_file'} = unquote($5);
2796         }
2797         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2798         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2799                 $res{'commit'} = $1;
2800         }
2801
2802         return wantarray ? %res : \%res;
2803 }
2804
2805 # wrapper: return parsed line of git-diff-tree "raw" output
2806 # (the argument might be raw line, or parsed info)
2807 sub parsed_difftree_line {
2808         my $line_or_ref = shift;
2809
2810         if (ref($line_or_ref) eq "HASH") {
2811                 # pre-parsed (or generated by hand)
2812                 return $line_or_ref;
2813         } else {
2814                 return parse_difftree_raw_line($line_or_ref);
2815         }
2816 }
2817
2818 # parse line of git-ls-tree output
2819 sub parse_ls_tree_line {
2820         my $line = shift;
2821         my %opts = @_;
2822         my %res;
2823
2824         if ($opts{'-l'}) {
2825                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa   16717  panic.c'
2826                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40}) +(-|[0-9]+)\t(.+)$/s;
2827
2828                 $res{'mode'} = $1;
2829                 $res{'type'} = $2;
2830                 $res{'hash'} = $3;
2831                 $res{'size'} = $4;
2832                 if ($opts{'-z'}) {
2833                         $res{'name'} = $5;
2834                 } else {
2835                         $res{'name'} = unquote($5);
2836                 }
2837         } else {
2838                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2839                 $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2840
2841                 $res{'mode'} = $1;
2842                 $res{'type'} = $2;
2843                 $res{'hash'} = $3;
2844                 if ($opts{'-z'}) {
2845                         $res{'name'} = $4;
2846                 } else {
2847                         $res{'name'} = unquote($4);
2848                 }
2849         }
2850
2851         return wantarray ? %res : \%res;
2852 }
2853
2854 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2855 sub parse_from_to_diffinfo {
2856         my ($diffinfo, $from, $to, @parents) = @_;
2857
2858         if ($diffinfo->{'nparents'}) {
2859                 # combined diff
2860                 $from->{'file'} = [];
2861                 $from->{'href'} = [];
2862                 fill_from_file_info($diffinfo, @parents)
2863                         unless exists $diffinfo->{'from_file'};
2864                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2865                         $from->{'file'}[$i] =
2866                                 defined $diffinfo->{'from_file'}[$i] ?
2867                                         $diffinfo->{'from_file'}[$i] :
2868                                         $diffinfo->{'to_file'};
2869                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2870                                 $from->{'href'}[$i] = href(action=>"blob",
2871                                                            hash_base=>$parents[$i],
2872                                                            hash=>$diffinfo->{'from_id'}[$i],
2873                                                            file_name=>$from->{'file'}[$i]);
2874                         } else {
2875                                 $from->{'href'}[$i] = undef;
2876                         }
2877                 }
2878         } else {
2879                 # ordinary (not combined) diff
2880                 $from->{'file'} = $diffinfo->{'from_file'};
2881                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2882                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2883                                                hash=>$diffinfo->{'from_id'},
2884                                                file_name=>$from->{'file'});
2885                 } else {
2886                         delete $from->{'href'};
2887                 }
2888         }
2889
2890         $to->{'file'} = $diffinfo->{'to_file'};
2891         if (!is_deleted($diffinfo)) { # file exists in result
2892                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2893                                      hash=>$diffinfo->{'to_id'},
2894                                      file_name=>$to->{'file'});
2895         } else {
2896                 delete $to->{'href'};
2897         }
2898 }
2899
2900 ## ......................................................................
2901 ## parse to array of hashes functions
2902
2903 sub git_get_heads_list {
2904         my $limit = shift;
2905         my @headslist;
2906
2907         open my $fd, '-|', git_cmd(), 'for-each-ref',
2908                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2909                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2910                 'refs/heads'
2911                 or return;
2912         while (my $line = <$fd>) {
2913                 my %ref_item;
2914
2915                 chomp $line;
2916                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2917                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2918                 my ($committer, $epoch, $tz) =
2919                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2920                 $ref_item{'fullname'}  = $name;
2921                 $name =~ s!^refs/heads/!!;
2922
2923                 $ref_item{'name'}  = $name;
2924                 $ref_item{'id'}    = $hash;
2925                 $ref_item{'title'} = $title || '(no commit message)';
2926                 $ref_item{'epoch'} = $epoch;
2927                 if ($epoch) {
2928                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2929                 } else {
2930                         $ref_item{'age'} = "unknown";
2931                 }
2932
2933                 push @headslist, \%ref_item;
2934         }
2935         close $fd;
2936
2937         return wantarray ? @headslist : \@headslist;
2938 }
2939
2940 sub git_get_tags_list {
2941         my $limit = shift;
2942         my @tagslist;
2943
2944         open my $fd, '-|', git_cmd(), 'for-each-ref',
2945                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2946                 '--format=%(objectname) %(objecttype) %(refname) '.
2947                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2948                 'refs/tags'
2949                 or return;
2950         while (my $line = <$fd>) {
2951                 my %ref_item;
2952
2953                 chomp $line;
2954                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2955                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2956                 my ($creator, $epoch, $tz) =
2957                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2958                 $ref_item{'fullname'} = $name;
2959                 $name =~ s!^refs/tags/!!;
2960
2961                 $ref_item{'type'} = $type;
2962                 $ref_item{'id'} = $id;
2963                 $ref_item{'name'} = $name;
2964                 if ($type eq "tag") {
2965                         $ref_item{'subject'} = $title;
2966                         $ref_item{'reftype'} = $reftype;
2967                         $ref_item{'refid'}   = $refid;
2968                 } else {
2969                         $ref_item{'reftype'} = $type;
2970                         $ref_item{'refid'}   = $id;
2971                 }
2972
2973                 if ($type eq "tag" || $type eq "commit") {
2974                         $ref_item{'epoch'} = $epoch;
2975                         if ($epoch) {
2976                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2977                         } else {
2978                                 $ref_item{'age'} = "unknown";
2979                         }
2980                 }
2981
2982                 push @tagslist, \%ref_item;
2983         }
2984         close $fd;
2985
2986         return wantarray ? @tagslist : \@tagslist;
2987 }
2988
2989 ## ----------------------------------------------------------------------
2990 ## filesystem-related functions
2991
2992 sub get_file_owner {
2993         my $path = shift;
2994
2995         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2996         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2997         if (!defined $gcos) {
2998                 return undef;
2999         }
3000         my $owner = $gcos;
3001         $owner =~ s/[,;].*$//;
3002         return to_utf8($owner);
3003 }
3004
3005 # assume that file exists
3006 sub insert_file {
3007         my $filename = shift;
3008
3009         open my $fd, '<', $filename;
3010         print map { to_utf8($_) } <$fd>;
3011         close $fd;
3012 }
3013
3014 ## ......................................................................
3015 ## mimetype related functions
3016
3017 sub mimetype_guess_file {
3018         my $filename = shift;
3019         my $mimemap = shift;
3020         -r $mimemap or return undef;
3021
3022         my %mimemap;
3023         open(my $mh, '<', $mimemap) or return undef;
3024         while (<$mh>) {
3025                 next if m/^#/; # skip comments
3026                 my ($mimetype, $exts) = split(/\t+/);
3027                 if (defined $exts) {
3028                         my @exts = split(/\s+/, $exts);
3029                         foreach my $ext (@exts) {
3030                                 $mimemap{$ext} = $mimetype;
3031                         }
3032                 }
3033         }
3034         close($mh);
3035
3036         $filename =~ /\.([^.]*)$/;
3037         return $mimemap{$1};
3038 }
3039
3040 sub mimetype_guess {
3041         my $filename = shift;
3042         my $mime;
3043         $filename =~ /\./ or return undef;
3044
3045         if ($mimetypes_file) {
3046                 my $file = $mimetypes_file;
3047                 if ($file !~ m!^/!) { # if it is relative path
3048                         # it is relative to project
3049                         $file = "$projectroot/$project/$file";
3050                 }
3051                 $mime = mimetype_guess_file($filename, $file);
3052         }
3053         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
3054         return $mime;
3055 }
3056
3057 sub blob_mimetype {
3058         my $fd = shift;
3059         my $filename = shift;
3060
3061         if ($filename) {
3062                 my $mime = mimetype_guess($filename);
3063                 $mime and return $mime;
3064         }
3065
3066         # just in case
3067         return $default_blob_plain_mimetype unless $fd;
3068
3069         if (-T $fd) {
3070                 return 'text/plain';
3071         } elsif (! $filename) {
3072                 return 'application/octet-stream';
3073         } elsif ($filename =~ m/\.png$/i) {
3074                 return 'image/png';
3075         } elsif ($filename =~ m/\.gif$/i) {
3076                 return 'image/gif';
3077         } elsif ($filename =~ m/\.jpe?g$/i) {
3078                 return 'image/jpeg';
3079         } else {
3080                 return 'application/octet-stream';
3081         }
3082 }
3083
3084 sub blob_contenttype {
3085         my ($fd, $file_name, $type) = @_;
3086
3087         $type ||= blob_mimetype($fd, $file_name);
3088         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3089                 $type .= "; charset=$default_text_plain_charset";
3090         }
3091
3092         return $type;
3093 }
3094
3095 ## ======================================================================
3096 ## functions printing HTML: header, footer, error page
3097
3098 sub git_header_html {
3099         my $status = shift || "200 OK";
3100         my $expires = shift;
3101
3102         my $title = "$site_name";
3103         if (defined $project) {
3104                 $title .= " - " . to_utf8($project);
3105                 if (defined $action) {
3106                         $title .= "/$action";
3107                         if (defined $file_name) {
3108                                 $title .= " - " . esc_path($file_name);
3109                                 if ($action eq "tree" && $file_name !~ m|/$|) {
3110                                         $title .= "/";
3111                                 }
3112                         }
3113                 }
3114         }
3115         my $content_type;
3116         # require explicit support from the UA if we are to send the page as
3117         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3118         # we have to do this because MSIE sometimes globs '*/*', pretending to
3119         # support xhtml+xml but choking when it gets what it asked for.
3120         if (defined $cgi->http('HTTP_ACCEPT') &&
3121             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3122             $cgi->Accept('application/xhtml+xml') != 0) {
3123                 $content_type = 'application/xhtml+xml';
3124         } else {
3125                 $content_type = 'text/html';
3126         }
3127         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3128                            -status=> $status, -expires => $expires);
3129         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3130         print <<EOF;
3131 <?xml version="1.0" encoding="utf-8"?>
3132 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3133 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3134 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3135 <!-- git core binaries version $git_version -->
3136 <head>
3137 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3138 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3139 <meta name="robots" content="index, nofollow"/>
3140 <title>$title</title>
3141 <script type="text/javascript">/* <![CDATA[ */
3142 function fixBlameLinks() {
3143         var allLinks = document.getElementsByTagName("a");
3144         for (var i = 0; i < allLinks.length; i++) {
3145                 var link = allLinks.item(i);
3146                 if (link.className == 'blamelink')
3147                         link.href = link.href.replace("/blame/", "/blame_incremental/");
3148         }
3149 }
3150 /* ]]> */</script>
3151 EOF
3152         # the stylesheet, favicon etc urls won't work correctly with path_info
3153         # unless we set the appropriate base URL
3154         if ($ENV{'PATH_INFO'}) {
3155                 print "<base href=\"".esc_url($base_url)."\" />\n";
3156         }
3157         # print out each stylesheet that exist, providing backwards capability
3158         # for those people who defined $stylesheet in a config file
3159         if (defined $stylesheet) {
3160                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3161         } else {
3162                 foreach my $stylesheet (@stylesheets) {
3163                         next unless $stylesheet;
3164                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3165                 }
3166         }
3167         if (defined $project) {
3168                 my %href_params = get_feed_info();
3169                 if (!exists $href_params{'-title'}) {
3170                         $href_params{'-title'} = 'log';
3171                 }
3172
3173                 foreach my $format qw(RSS Atom) {
3174                         my $type = lc($format);
3175                         my %link_attr = (
3176                                 '-rel' => 'alternate',
3177                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3178                                 '-type' => "application/$type+xml"
3179                         );
3180
3181                         $href_params{'action'} = $type;
3182                         $link_attr{'-href'} = href(%href_params);
3183                         print "<link ".
3184                               "rel=\"$link_attr{'-rel'}\" ".
3185                               "title=\"$link_attr{'-title'}\" ".
3186                               "href=\"$link_attr{'-href'}\" ".
3187                               "type=\"$link_attr{'-type'}\" ".
3188                               "/>\n";
3189
3190                         $href_params{'extra_options'} = '--no-merges';
3191                         $link_attr{'-href'} = href(%href_params);
3192                         $link_attr{'-title'} .= ' (no merges)';
3193                         print "<link ".
3194                               "rel=\"$link_attr{'-rel'}\" ".
3195                               "title=\"$link_attr{'-title'}\" ".
3196                               "href=\"$link_attr{'-href'}\" ".
3197                               "type=\"$link_attr{'-type'}\" ".
3198                               "/>\n";
3199                 }
3200
3201         } else {
3202                 printf('<link rel="alternate" title="%s projects list" '.
3203                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3204                        $site_name, href(project=>undef, action=>"project_index"));
3205                 printf('<link rel="alternate" title="%s projects feeds" '.
3206                        'href="%s" type="text/x-opml" />'."\n",
3207                        $site_name, href(project=>undef, action=>"opml"));
3208         }
3209         if (defined $favicon) {
3210                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3211         }
3212
3213         if (defined $gitwebjs) {
3214                 print qq(<script src="$gitwebjs" type="text/javascript"></script>\n);
3215         }
3216
3217         print "</head>\n";
3218         if (gitweb_check_feature('blame_incremental')) {
3219               print "<body onload=\"fixBlameLinks();\">\n";
3220         } else {
3221               print "<body>\n";
3222         }
3223
3224         if (-f $site_header) {
3225                 insert_file($site_header);
3226         }
3227
3228         print "<div class=\"page_header\">\n" .
3229               $cgi->a({-href => esc_url($logo_url),
3230                        -title => $logo_label},
3231                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3232         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3233         if (defined $project) {
3234                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3235                 if (defined $action) {
3236                         print " / $action";
3237                 }
3238                 print "\n";
3239         }
3240         print "</div>\n";
3241
3242         my $have_search = gitweb_check_feature('search');
3243         if (defined $project && $have_search) {
3244                 if (!defined $searchtext) {
3245                         $searchtext = "";
3246                 }
3247                 my $search_hash;
3248                 if (defined $hash_base) {
3249                         $search_hash = $hash_base;
3250                 } elsif (defined $hash) {
3251                         $search_hash = $hash;
3252                 } else {
3253                         $search_hash = "HEAD";
3254                 }
3255                 my $action = $my_uri;
3256                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3257                 if ($use_pathinfo) {
3258                         $action .= "/".esc_url($project);
3259                 }
3260                 print $cgi->startform(-method => "get", -action => $action) .
3261                       "<div class=\"search\">\n" .
3262                       (!$use_pathinfo &&
3263                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3264                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3265                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3266                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3267                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3268                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3269                       " search:\n",
3270                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3271                       "<span title=\"Extended regular expression\">" .
3272                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3273                                      -checked => $search_use_regexp) .
3274                       "</span>" .
3275                       "</div>" .
3276                       $cgi->end_form() . "\n";
3277         }
3278 }
3279
3280 sub git_footer_html {
3281         my $feed_class = 'rss_logo';
3282
3283         print "<div class=\"page_footer\">\n";
3284         if (defined $project) {
3285                 my $descr = git_get_project_description($project);
3286                 if (defined $descr) {
3287                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3288                 }
3289
3290                 my %href_params = get_feed_info();
3291                 if (!%href_params) {
3292                         $feed_class .= ' generic';
3293                 }
3294                 $href_params{'-title'} ||= 'log';
3295
3296                 foreach my $format qw(RSS Atom) {
3297                         $href_params{'action'} = lc($format);
3298                         print $cgi->a({-href => href(%href_params),
3299                                       -title => "$href_params{'-title'} $format feed",
3300                                       -class => $feed_class}, $format)."\n";
3301                 }
3302
3303         } else {
3304                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3305                               -class => $feed_class}, "OPML") . " ";
3306                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3307                               -class => $feed_class}, "TXT") . "\n";
3308         }
3309         print "</div>\n"; # class="page_footer"
3310
3311         if (-f $site_footer) {
3312                 insert_file($site_footer);
3313         }
3314
3315         print "</body>\n" .
3316               "</html>";
3317 }
3318
3319 # die_error(<http_status_code>, <error_message>)
3320 # Example: die_error(404, 'Hash not found')
3321 # By convention, use the following status codes (as defined in RFC 2616):
3322 # 400: Invalid or missing CGI parameters, or
3323 #      requested object exists but has wrong type.
3324 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3325 #      this server or project.
3326 # 404: Requested object/revision/project doesn't exist.
3327 # 500: The server isn't configured properly, or
3328 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3329 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3330 sub die_error {
3331         my $status = shift || 500;
3332         my $error = shift || "Internal server error";
3333
3334         my %http_responses = (400 => '400 Bad Request',
3335                               403 => '403 Forbidden',
3336                               404 => '404 Not Found',
3337                               500 => '500 Internal Server Error');
3338         git_header_html($http_responses{$status});
3339         print <<EOF;
3340 <div class="page_body">
3341 <br /><br />
3342 $status - $error
3343 <br />
3344 </div>
3345 EOF
3346         git_footer_html();
3347         exit;
3348 }
3349
3350 ## ----------------------------------------------------------------------
3351 ## functions printing or outputting HTML: navigation
3352
3353 sub git_print_page_nav {
3354         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3355         $extra = '' if !defined $extra; # pager or formats
3356
3357         my @navs = qw(summary shortlog log commit commitdiff tree);
3358         if ($suppress) {
3359                 @navs = grep { $_ ne $suppress } @navs;
3360         }
3361
3362         my %arg = map { $_ => {action=>$_} } @navs;
3363         if (defined $head) {
3364                 for (qw(commit commitdiff)) {
3365                         $arg{$_}{'hash'} = $head;
3366                 }
3367                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3368                         for (qw(shortlog log)) {
3369                                 $arg{$_}{'hash'} = $head;
3370                         }
3371                 }
3372         }
3373
3374         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3375         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3376
3377         my @actions = gitweb_get_feature('actions');
3378         my %repl = (
3379                 '%' => '%',
3380                 'n' => $project,         # project name
3381                 'f' => $git_dir,         # project path within filesystem
3382                 'h' => $treehead || '',  # current hash ('h' parameter)
3383                 'b' => $treebase || '',  # hash base ('hb' parameter)
3384         );
3385         while (@actions) {
3386                 my ($label, $link, $pos) = splice(@actions,0,3);
3387                 # insert
3388                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3389                 # munch munch
3390                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3391                 $arg{$label}{'_href'} = $link;
3392         }
3393
3394         print "<div class=\"page_nav\">\n" .
3395                 (join " | ",
3396                  map { $_ eq $current ?
3397                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3398                  } @navs);
3399         print "<br/>\n$extra<br/>\n" .
3400               "</div>\n";
3401 }
3402
3403 sub format_paging_nav {
3404         my ($action, $hash, $head, $page, $has_next_link) = @_;
3405         my $paging_nav;
3406
3407
3408         if ($hash ne $head || $page) {
3409                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3410         } else {
3411                 $paging_nav .= "HEAD";
3412         }
3413
3414         if ($page > 0) {
3415                 $paging_nav .= " &sdot; " .
3416                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3417                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3418         } else {
3419                 $paging_nav .= " &sdot; prev";
3420         }
3421
3422         if ($has_next_link) {
3423                 $paging_nav .= " &sdot; " .
3424                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3425                                  -accesskey => "n", -title => "Alt-n"}, "next");
3426         } else {
3427                 $paging_nav .= " &sdot; next";
3428         }
3429
3430         return $paging_nav;
3431 }
3432
3433 ## ......................................................................
3434 ## functions printing or outputting HTML: div
3435
3436 sub git_print_header_div {
3437         my ($action, $title, $hash, $hash_base) = @_;
3438         my %args = ();
3439
3440         $args{'action'} = $action;
3441         $args{'hash'} = $hash if $hash;
3442         $args{'hash_base'} = $hash_base if $hash_base;
3443
3444         print "<div class=\"header\">\n" .
3445               $cgi->a({-href => href(%args), -class => "title"},
3446               $title ? $title : $action) .
3447               "\n</div>\n";
3448 }
3449
3450 sub print_local_time {
3451         my %date = @_;
3452         if ($date{'hour_local'} < 6) {
3453                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3454                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3455         } else {
3456                 printf(" (%02d:%02d %s)",
3457                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3458         }
3459 }
3460
3461 # Outputs the author name and date in long form
3462 sub git_print_authorship {
3463         my $co = shift;
3464         my %opts = @_;
3465         my $tag = $opts{-tag} || 'div';
3466         my $author = $co->{'author_name'};
3467
3468         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3469         print "<$tag class=\"author_date\">" .
3470               format_search_author($author, "author", esc_html($author)) .
3471               " [$ad{'rfc2822'}";
3472         print_local_time(%ad) if ($opts{-localtime});
3473         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3474                   . "</$tag>\n";
3475 }
3476
3477 # Outputs table rows containing the full author or committer information,
3478 # in the format expected for 'commit' view (& similia).
3479 # Parameters are a commit hash reference, followed by the list of people
3480 # to output information for. If the list is empty it defalts to both
3481 # author and committer.
3482 sub git_print_authorship_rows {
3483         my $co = shift;
3484         # too bad we can't use @people = @_ || ('author', 'committer')
3485         my @people = @_;
3486         @people = ('author', 'committer') unless @people;
3487         foreach my $who (@people) {
3488                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3489                 print "<tr><td>$who</td><td>" .
3490                       format_search_author($co->{"${who}_name"}, $who,
3491                                esc_html($co->{"${who}_name"})) . " " .
3492                       format_search_author($co->{"${who}_email"}, $who,
3493                                esc_html("<" . $co->{"${who}_email"} . ">")) .
3494                       "</td><td rowspan=\"2\">" .
3495                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3496                       "</td></tr>\n" .
3497                       "<tr>" .
3498                       "<td></td><td> $wd{'rfc2822'}";
3499                 print_local_time(%wd);
3500                 print "</td>" .
3501                       "</tr>\n";
3502         }
3503 }
3504
3505 sub git_print_page_path {
3506         my $name = shift;
3507         my $type = shift;
3508         my $hb = shift;
3509
3510
3511         print "<div class=\"page_path\">";
3512         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3513                       -title => 'tree root'}, to_utf8("[$project]"));
3514         print " / ";
3515         if (defined $name) {
3516                 my @dirname = split '/', $name;
3517                 my $basename = pop @dirname;
3518                 my $fullname = '';
3519
3520                 foreach my $dir (@dirname) {
3521                         $fullname .= ($fullname ? '/' : '') . $dir;
3522                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3523                                                      hash_base=>$hb),
3524                                       -title => $fullname}, esc_path($dir));
3525                         print " / ";
3526                 }
3527                 if (defined $type && $type eq 'blob') {
3528                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3529                                                      hash_base=>$hb),
3530                                       -title => $name}, esc_path($basename));
3531                 } elsif (defined $type && $type eq 'tree') {
3532                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3533                                                      hash_base=>$hb),
3534                                       -title => $name}, esc_path($basename));
3535                         print " / ";
3536                 } else {
3537                         print esc_path($basename);
3538                 }
3539         }
3540         print "<br/></div>\n";
3541 }
3542
3543 sub git_print_log {
3544         my $log = shift;
3545         my %opts = @_;
3546
3547         if ($opts{'-remove_title'}) {
3548                 # remove title, i.e. first line of log
3549                 shift @$log;
3550         }
3551         # remove leading empty lines
3552         while (defined $log->[0] && $log->[0] eq "") {
3553                 shift @$log;
3554         }
3555
3556         # print log
3557         my $signoff = 0;
3558         my $empty = 0;
3559         foreach my $line (@$log) {
3560                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3561                         $signoff = 1;
3562                         $empty = 0;
3563                         if (! $opts{'-remove_signoff'}) {
3564                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3565                                 next;
3566                         } else {
3567                                 # remove signoff lines
3568                                 next;
3569                         }
3570                 } else {
3571                         $signoff = 0;
3572                 }
3573
3574                 # print only one empty line
3575                 # do not print empty line after signoff
3576                 if ($line eq "") {
3577                         next if ($empty || $signoff);
3578                         $empty = 1;
3579                 } else {
3580                         $empty = 0;
3581                 }
3582
3583                 print format_log_line_html($line) . "<br/>\n";
3584         }
3585
3586         if ($opts{'-final_empty_line'}) {
3587                 # end with single empty line
3588                 print "<br/>\n" unless $empty;
3589         }
3590 }
3591
3592 # return link target (what link points to)
3593 sub git_get_link_target {
3594         my $hash = shift;
3595         my $link_target;
3596
3597         # read link
3598         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3599                 or return;
3600         {
3601                 local $/ = undef;
3602                 $link_target = <$fd>;
3603         }
3604         close $fd
3605                 or return;
3606
3607         return $link_target;
3608 }
3609
3610 # given link target, and the directory (basedir) the link is in,
3611 # return target of link relative to top directory (top tree);
3612 # return undef if it is not possible (including absolute links).
3613 sub normalize_link_target {
3614         my ($link_target, $basedir) = @_;
3615
3616         # absolute symlinks (beginning with '/') cannot be normalized
3617         return if (substr($link_target, 0, 1) eq '/');
3618
3619         # normalize link target to path from top (root) tree (dir)
3620         my $path;
3621         if ($basedir) {
3622                 $path = $basedir . '/' . $link_target;
3623         } else {
3624                 # we are in top (root) tree (dir)
3625                 $path = $link_target;
3626         }
3627
3628         # remove //, /./, and /../
3629         my @path_parts;
3630         foreach my $part (split('/', $path)) {
3631                 # discard '.' and ''
3632                 next if (!$part || $part eq '.');
3633                 # handle '..'
3634                 if ($part eq '..') {
3635                         if (@path_parts) {
3636                                 pop @path_parts;
3637                         } else {
3638                                 # link leads outside repository (outside top dir)
3639                                 return;
3640                         }
3641                 } else {
3642                         push @path_parts, $part;
3643                 }
3644         }
3645         $path = join('/', @path_parts);
3646
3647         return $path;
3648 }
3649
3650 # print tree entry (row of git_tree), but without encompassing <tr> element
3651 sub git_print_tree_entry {
3652         my ($t, $basedir, $hash_base, $have_blame) = @_;
3653
3654         my %base_key = ();
3655         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3656
3657         # The format of a table row is: mode list link.  Where mode is
3658         # the mode of the entry, list is the name of the entry, an href,
3659         # and link is the action links of the entry.
3660
3661         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3662         if (exists $t->{'size'}) {
3663                 print "<td class=\"size\">$t->{'size'}</td>\n";
3664         }
3665         if ($t->{'type'} eq "blob") {
3666                 print "<td class=\"list\">" .
3667                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3668                                                file_name=>"$basedir$t->{'name'}", %base_key),
3669                                 -class => "list"}, esc_path($t->{'name'}));
3670                 if (S_ISLNK(oct $t->{'mode'})) {
3671                         my $link_target = git_get_link_target($t->{'hash'});
3672                         if ($link_target) {
3673                                 my $norm_target = normalize_link_target($link_target, $basedir);
3674                                 if (defined $norm_target) {
3675                                         print " -> " .
3676                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3677                                                                      file_name=>$norm_target),
3678                                                        -title => $norm_target}, esc_path($link_target));
3679                                 } else {
3680                                         print " -> " . esc_path($link_target);
3681                                 }
3682                         }
3683                 }
3684                 print "</td>\n";
3685                 print "<td class=\"link\">";
3686                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3687                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3688                               "blob");
3689                 if ($have_blame) {
3690                         print " | " .
3691                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3692                                                      file_name=>"$basedir$t->{'name'}", %base_key), -class => "blamelink"},
3693                                       "blame");
3694                 }
3695                 if (defined $hash_base) {
3696                         print " | " .
3697                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3698                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3699                                       "history");
3700                 }
3701                 print " | " .
3702                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3703                                                file_name=>"$basedir$t->{'name'}")},
3704                                 "raw");
3705                 print "</td>\n";
3706
3707         } elsif ($t->{'type'} eq "tree") {
3708                 print "<td class=\"list\">";
3709                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3710                                              file_name=>"$basedir$t->{'name'}",
3711                                              %base_key)},
3712                               esc_path($t->{'name'}));
3713                 print "</td>\n";
3714                 print "<td class=\"link\">";
3715                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3716                                              file_name=>"$basedir$t->{'name'}",
3717                                              %base_key)},
3718                               "tree");
3719                 if (defined $hash_base) {
3720                         print " | " .
3721                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3722                                                      file_name=>"$basedir$t->{'name'}")},
3723                                       "history");
3724                 }
3725                 print "</td>\n";
3726         } else {
3727                 # unknown object: we can only present history for it
3728                 # (this includes 'commit' object, i.e. submodule support)
3729                 print "<td class=\"list\">" .
3730                       esc_path($t->{'name'}) .
3731                       "</td>\n";
3732                 print "<td class=\"link\">";
3733                 if (defined $hash_base) {
3734                         print $cgi->a({-href => href(action=>"history",
3735                                                      hash_base=>$hash_base,
3736                                                      file_name=>"$basedir$t->{'name'}")},
3737                                       "history");
3738                 }
3739                 print "</td>\n";
3740         }
3741 }
3742
3743 ## ......................................................................
3744 ## functions printing large fragments of HTML
3745
3746 # get pre-image filenames for merge (combined) diff
3747 sub fill_from_file_info {
3748         my ($diff, @parents) = @_;
3749
3750         $diff->{'from_file'} = [ ];
3751         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3752         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3753                 if ($diff->{'status'}[$i] eq 'R' ||
3754                     $diff->{'status'}[$i] eq 'C') {
3755                         $diff->{'from_file'}[$i] =
3756                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3757                 }
3758         }
3759
3760         return $diff;
3761 }
3762
3763 # is current raw difftree line of file deletion
3764 sub is_deleted {
3765         my $diffinfo = shift;
3766
3767         return $diffinfo->{'to_id'} eq ('0' x 40);
3768 }
3769
3770 # does patch correspond to [previous] difftree raw line
3771 # $diffinfo  - hashref of parsed raw diff format
3772 # $patchinfo - hashref of parsed patch diff format
3773 #              (the same keys as in $diffinfo)
3774 sub is_patch_split {
3775         my ($diffinfo, $patchinfo) = @_;
3776
3777         return defined $diffinfo && defined $patchinfo
3778                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3779 }
3780
3781
3782 sub git_difftree_body {
3783         my ($difftree, $hash, @parents) = @_;
3784         my ($parent) = $parents[0];
3785         my $have_blame = gitweb_check_feature('blame');
3786         print "<div class=\"list_head\">\n";
3787         if ($#{$difftree} > 10) {
3788                 print(($#{$difftree} + 1) . " files changed:\n");
3789         }
3790         print "</div>\n";
3791
3792         print "<table class=\"" .
3793               (@parents > 1 ? "combined " : "") .
3794               "diff_tree\">\n";
3795
3796         # header only for combined diff in 'commitdiff' view
3797         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3798         if ($has_header) {
3799                 # table header
3800                 print "<thead><tr>\n" .
3801                        "<th></th><th></th>\n"; # filename, patchN link
3802                 for (my $i = 0; $i < @parents; $i++) {
3803                         my $par = $parents[$i];
3804                         print "<th>" .
3805                               $cgi->a({-href => href(action=>"commitdiff",
3806                                                      hash=>$hash, hash_parent=>$par),
3807                                        -title => 'commitdiff to parent number ' .
3808                                                   ($i+1) . ': ' . substr($par,0,7)},
3809                                       $i+1) .
3810                               "&nbsp;</th>\n";
3811                 }
3812                 print "</tr></thead>\n<tbody>\n";
3813         }
3814
3815         my $alternate = 1;
3816         my $patchno = 0;
3817         foreach my $line (@{$difftree}) {
3818                 my $diff = parsed_difftree_line($line);
3819
3820                 if ($alternate) {
3821                         print "<tr class=\"dark\">\n";
3822                 } else {
3823                         print "<tr class=\"light\">\n";
3824                 }
3825                 $alternate ^= 1;
3826
3827                 if (exists $diff->{'nparents'}) { # combined diff
3828
3829                         fill_from_file_info($diff, @parents)
3830                                 unless exists $diff->{'from_file'};
3831
3832                         if (!is_deleted($diff)) {
3833                                 # file exists in the result (child) commit
3834                                 print "<td>" .
3835                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3836                                                              file_name=>$diff->{'to_file'},
3837                                                              hash_base=>$hash),
3838                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3839                                       "</td>\n";
3840                         } else {
3841                                 print "<td>" .
3842                                       esc_path($diff->{'to_file'}) .
3843                                       "</td>\n";
3844                         }
3845
3846                         if ($action eq 'commitdiff') {
3847                                 # link to patch
3848                                 $patchno++;
3849                                 print "<td class=\"link\">" .
3850                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3851                                       " | " .
3852                                       "</td>\n";
3853                         }
3854
3855                         my $has_history = 0;
3856                         my $not_deleted = 0;
3857                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3858                                 my $hash_parent = $parents[$i];
3859                                 my $from_hash = $diff->{'from_id'}[$i];
3860                                 my $from_path = $diff->{'from_file'}[$i];
3861                                 my $status = $diff->{'status'}[$i];
3862
3863                                 $has_history ||= ($status ne 'A');
3864                                 $not_deleted ||= ($status ne 'D');
3865
3866                                 if ($status eq 'A') {
3867                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3868                                 } elsif ($status eq 'D') {
3869                                         print "<td class=\"link\">" .
3870                                               $cgi->a({-href => href(action=>"blob",
3871                                                                      hash_base=>$hash,
3872                                                                      hash=>$from_hash,
3873                                                                      file_name=>$from_path)},
3874                                                       "blob" . ($i+1)) .
3875                                               " | </td>\n";
3876                                 } else {
3877                                         if ($diff->{'to_id'} eq $from_hash) {
3878                                                 print "<td class=\"link nochange\">";
3879                                         } else {
3880                                                 print "<td class=\"link\">";
3881                                         }
3882                                         print $cgi->a({-href => href(action=>"blobdiff",
3883                                                                      hash=>$diff->{'to_id'},
3884                                                                      hash_parent=>$from_hash,
3885                                                                      hash_base=>$hash,
3886                                                                      hash_parent_base=>$hash_parent,
3887                                                                      file_name=>$diff->{'to_file'},
3888                                                                      file_parent=>$from_path)},
3889                                                       "diff" . ($i+1)) .
3890                                               " | </td>\n";
3891                                 }
3892                         }
3893
3894                         print "<td class=\"link\">";
3895                         if ($not_deleted) {
3896                                 print $cgi->a({-href => href(action=>"blob",
3897                                                              hash=>$diff->{'to_id'},
3898                                                              file_name=>$diff->{'to_file'},
3899                                                              hash_base=>$hash)},
3900                                               "blob");
3901                                 print " | " if ($has_history);
3902                         }
3903                         if ($has_history) {
3904                                 print $cgi->a({-href => href(action=>"history",
3905                                                              file_name=>$diff->{'to_file'},
3906                                                              hash_base=>$hash)},
3907                                               "history");
3908                         }
3909                         print "</td>\n";
3910
3911                         print "</tr>\n";
3912                         next; # instead of 'else' clause, to avoid extra indent
3913                 }
3914                 # else ordinary diff
3915
3916                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3917                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3918                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3919                         $to_mode_oct = oct $diff->{'to_mode'};
3920                         if (S_ISREG($to_mode_oct)) { # only for regular file
3921                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3922                         }
3923                         $to_file_type = file_type($diff->{'to_mode'});
3924                 }
3925                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3926                         $from_mode_oct = oct $diff->{'from_mode'};
3927                         if (S_ISREG($to_mode_oct)) { # only for regular file
3928                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3929                         }
3930                         $from_file_type = file_type($diff->{'from_mode'});
3931                 }
3932
3933                 if ($diff->{'status'} eq "A") { # created
3934                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3935                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3936                         $mode_chng   .= "]</span>";
3937                         print "<td>";
3938                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3939                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3940                                       -class => "list"}, esc_path($diff->{'file'}));
3941                         print "</td>\n";
3942                         print "<td>$mode_chng</td>\n";
3943                         print "<td class=\"link\">";
3944                         if ($action eq 'commitdiff') {
3945                                 # link to patch
3946                                 $patchno++;
3947                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3948                                 print " | ";
3949                         }
3950                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3951                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3952                                       "blob");
3953                         print "</td>\n";
3954
3955                 } elsif ($diff->{'status'} eq "D") { # deleted
3956                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3957                         print "<td>";
3958                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3959                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3960                                        -class => "list"}, esc_path($diff->{'file'}));
3961                         print "</td>\n";
3962                         print "<td>$mode_chng</td>\n";
3963                         print "<td class=\"link\">";
3964                         if ($action eq 'commitdiff') {
3965                                 # link to patch
3966                                 $patchno++;
3967                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3968                                 print " | ";
3969                         }
3970                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3971                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3972                                       "blob") . " | ";
3973                         if ($have_blame) {
3974                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3975                                                              file_name=>$diff->{'file'}), -class => "blamelink"},
3976                                               "blame") . " | ";
3977                         }
3978                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3979                                                      file_name=>$diff->{'file'})},
3980                                       "history");
3981                         print "</td>\n";
3982
3983                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3984                         my $mode_chnge = "";
3985                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3986                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3987                                 if ($from_file_type ne $to_file_type) {
3988                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3989                                 }
3990                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3991                                         if ($from_mode_str && $to_mode_str) {
3992                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3993                                         } elsif ($to_mode_str) {
3994                                                 $mode_chnge .= " mode: $to_mode_str";
3995                                         }
3996                                 }
3997                                 $mode_chnge .= "]</span>\n";
3998                         }
3999                         print "<td>";
4000                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4001                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
4002                                       -class => "list"}, esc_path($diff->{'file'}));
4003                         print "</td>\n";
4004                         print "<td>$mode_chnge</td>\n";
4005                         print "<td class=\"link\">";
4006                         if ($action eq 'commitdiff') {
4007                                 # link to patch
4008                                 $patchno++;
4009                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4010                                       " | ";
4011                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4012                                 # "commit" view and modified file (not onlu mode changed)
4013                                 print $cgi->a({-href => href(action=>"blobdiff",
4014                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4015                                                              hash_base=>$hash, hash_parent_base=>$parent,
4016                                                              file_name=>$diff->{'file'})},
4017                                               "diff") .
4018                                       " | ";
4019                         }
4020                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4021                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
4022                                        "blob") . " | ";
4023                         if ($have_blame) {
4024                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4025                                                              file_name=>$diff->{'file'}), -class => "blamelink"},
4026                                               "blame") . " | ";
4027                         }
4028                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4029                                                      file_name=>$diff->{'file'})},
4030                                       "history");
4031                         print "</td>\n";
4032
4033                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
4034                         my %status_name = ('R' => 'moved', 'C' => 'copied');
4035                         my $nstatus = $status_name{$diff->{'status'}};
4036                         my $mode_chng = "";
4037                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
4038                                 # mode also for directories, so we cannot use $to_mode_str
4039                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
4040                         }
4041                         print "<td>" .
4042                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
4043                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
4044                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
4045                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
4046                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
4047                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
4048                                       -class => "list"}, esc_path($diff->{'from_file'})) .
4049                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
4050                               "<td class=\"link\">";
4051                         if ($action eq 'commitdiff') {
4052                                 # link to patch
4053                                 $patchno++;
4054                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
4055                                       " | ";
4056                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
4057                                 # "commit" view and modified file (not only pure rename or copy)
4058                                 print $cgi->a({-href => href(action=>"blobdiff",
4059                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
4060                                                              hash_base=>$hash, hash_parent_base=>$parent,
4061                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
4062                                               "diff") .
4063                                       " | ";
4064                         }
4065                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
4066                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
4067                                       "blob") . " | ";
4068                         if ($have_blame) {
4069                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
4070                                                              file_name=>$diff->{'to_file'}), -class => "blamelink"},
4071                                               "blame") . " | ";
4072                         }
4073                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
4074                                                     file_name=>$diff->{'to_file'})},
4075                                       "history");
4076                         print "</td>\n";
4077
4078                 } # we should not encounter Unmerged (U) or Unknown (X) status
4079                 print "</tr>\n";
4080         }
4081         print "</tbody>" if $has_header;
4082         print "</table>\n";
4083 }
4084
4085 sub git_patchset_body {
4086         my ($fd, $difftree, $hash, @hash_parents) = @_;
4087         my ($hash_parent) = $hash_parents[0];
4088
4089         my $is_combined = (@hash_parents > 1);
4090         my $patch_idx = 0;
4091         my $patch_number = 0;
4092         my $patch_line;
4093         my $diffinfo;
4094         my $to_name;
4095         my (%from, %to);
4096
4097         print "<div class=\"patchset\">\n";
4098
4099         # skip to first patch
4100         while ($patch_line = <$fd>) {
4101                 chomp $patch_line;
4102
4103                 last if ($patch_line =~ m/^diff /);
4104         }
4105
4106  PATCH:
4107         while ($patch_line) {
4108
4109                 # parse "git diff" header line
4110                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4111                         # $1 is from_name, which we do not use
4112                         $to_name = unquote($2);
4113                         $to_name =~ s!^b/!!;
4114                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4115                         # $1 is 'cc' or 'combined', which we do not use
4116                         $to_name = unquote($2);
4117                 } else {
4118                         $to_name = undef;
4119                 }
4120
4121                 # check if current patch belong to current raw line
4122                 # and parse raw git-diff line if needed
4123                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4124                         # this is continuation of a split patch
4125                         print "<div class=\"patch cont\">\n";
4126                 } else {
4127                         # advance raw git-diff output if needed
4128                         $patch_idx++ if defined $diffinfo;
4129
4130                         # read and prepare patch information
4131                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4132
4133                         # compact combined diff output can have some patches skipped
4134                         # find which patch (using pathname of result) we are at now;
4135                         if ($is_combined) {
4136                                 while ($to_name ne $diffinfo->{'to_file'}) {
4137                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4138                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4139                                               "</div>\n";  # class="patch"
4140
4141                                         $patch_idx++;
4142                                         $patch_number++;
4143
4144                                         last if $patch_idx > $#$difftree;
4145                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4146                                 }
4147                         }
4148
4149                         # modifies %from, %to hashes
4150                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4151
4152                         # this is first patch for raw difftree line with $patch_idx index
4153                         # we index @$difftree array from 0, but number patches from 1
4154                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4155                 }
4156
4157                 # git diff header
4158                 #assert($patch_line =~ m/^diff /) if DEBUG;
4159                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4160                 $patch_number++;
4161                 # print "git diff" header
4162                 print format_git_diff_header_line($patch_line, $diffinfo,
4163                                                   \%from, \%to);
4164
4165                 # print extended diff header
4166                 print "<div class=\"diff extended_header\">\n";
4167         EXTENDED_HEADER:
4168                 while ($patch_line = <$fd>) {
4169                         chomp $patch_line;
4170
4171                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4172
4173                         print format_extended_diff_header_line($patch_line, $diffinfo,
4174                                                                \%from, \%to);
4175                 }
4176                 print "</div>\n"; # class="diff extended_header"
4177
4178                 # from-file/to-file diff header
4179                 if (! $patch_line) {
4180                         print "</div>\n"; # class="patch"
4181                         last PATCH;
4182                 }
4183                 next PATCH if ($patch_line =~ m/^diff /);
4184                 #assert($patch_line =~ m/^---/) if DEBUG;
4185
4186                 my $last_patch_line = $patch_line;
4187                 $patch_line = <$fd>;
4188                 chomp $patch_line;
4189                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4190
4191                 print format_diff_from_to_header($last_patch_line, $patch_line,
4192                                                  $diffinfo, \%from, \%to,
4193                                                  @hash_parents);
4194
4195                 # the patch itself
4196         LINE:
4197                 while ($patch_line = <$fd>) {
4198                         chomp $patch_line;
4199
4200                         next PATCH if ($patch_line =~ m/^diff /);
4201
4202                         print format_diff_line($patch_line, \%from, \%to);
4203                 }
4204
4205         } continue {
4206                 print "</div>\n"; # class="patch"
4207         }
4208
4209         # for compact combined (--cc) format, with chunk and patch simpliciaction
4210         # patchset might be empty, but there might be unprocessed raw lines
4211         for (++$patch_idx if $patch_number > 0;
4212              $patch_idx < @$difftree;
4213              ++$patch_idx) {
4214                 # read and prepare patch information
4215                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4216
4217                 # generate anchor for "patch" links in difftree / whatchanged part
4218                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4219                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4220                       "</div>\n";  # class="patch"
4221
4222                 $patch_number++;
4223         }
4224
4225         if ($patch_number == 0) {
4226                 if (@hash_parents > 1) {
4227                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4228                 } else {
4229                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4230                 }
4231         }
4232
4233         print "</div>\n"; # class="patchset"
4234 }
4235
4236 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4237
4238 # fills project list info (age, description, owner, forks) for each
4239 # project in the list, removing invalid projects from returned list
4240 # NOTE: modifies $projlist, but does not remove entries from it
4241 sub fill_project_list_info {
4242         my ($projlist, $check_forks) = @_;
4243         my @projects;
4244
4245         my $show_ctags = gitweb_check_feature('ctags');
4246  PROJECT:
4247         foreach my $pr (@$projlist) {
4248                 my (@activity) = git_get_last_activity($pr->{'path'});
4249                 unless (@activity) {
4250                         next PROJECT;
4251                 }
4252                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4253                 if (!defined $pr->{'descr'}) {
4254                         my $descr = git_get_project_description($pr->{'path'}) || "";
4255                         $descr = to_utf8($descr);
4256                         $pr->{'descr_long'} = $descr;
4257                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4258                 }
4259                 if (!defined $pr->{'owner'}) {
4260                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4261                 }
4262                 if ($check_forks) {
4263                         my $pname = $pr->{'path'};
4264                         if (($pname =~ s/\.git$//) &&
4265                             ($pname !~ /\/$/) &&
4266                             (-d "$projectroot/$pname")) {
4267                                 $pr->{'forks'} = "-d $projectroot/$pname";
4268                         } else {
4269                                 $pr->{'forks'} = 0;
4270                         }
4271                 }
4272                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4273                 push @projects, $pr;
4274         }
4275
4276         return @projects;
4277 }
4278
4279 # print 'sort by' <th> element, generating 'sort by $name' replay link
4280 # if that order is not selected
4281 sub print_sort_th {
4282         my ($name, $order, $header) = @_;
4283         $header ||= ucfirst($name);
4284
4285         if ($order eq $name) {
4286                 print "<th>$header</th>\n";
4287         } else {
4288                 print "<th>" .
4289                       $cgi->a({-href => href(-replay=>1, order=>$name),
4290                                -class => "header"}, $header) .
4291                       "</th>\n";
4292         }
4293 }
4294
4295 sub git_project_list_body {
4296         # actually uses global variable $project
4297         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4298
4299         my $check_forks = gitweb_check_feature('forks');
4300         my @projects = fill_project_list_info($projlist, $check_forks);
4301
4302         $order ||= $default_projects_order;
4303         $from = 0 unless defined $from;
4304         $to = $#projects if (!defined $to || $#projects < $to);
4305
4306         my %order_info = (
4307                 project => { key => 'path', type => 'str' },
4308                 descr => { key => 'descr_long', type => 'str' },
4309                 owner => { key => 'owner', type => 'str' },
4310                 age => { key => 'age', type => 'num' }
4311         );
4312         my $oi = $order_info{$order};
4313         if ($oi->{'type'} eq 'str') {
4314                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4315         } else {
4316                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4317         }
4318
4319         my $show_ctags = gitweb_check_feature('ctags');
4320         if ($show_ctags) {
4321                 my %ctags;
4322                 foreach my $p (@projects) {
4323                         foreach my $ct (keys %{$p->{'ctags'}}) {
4324                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4325                         }
4326                 }
4327                 my $cloud = git_populate_project_tagcloud(\%ctags);
4328                 print git_show_project_tagcloud($cloud, 64);
4329         }
4330
4331         print "<table class=\"project_list\">\n";
4332         unless ($no_header) {
4333                 print "<tr>\n";
4334                 if ($check_forks) {
4335                         print "<th></th>\n";
4336                 }
4337                 print_sort_th('project', $order, 'Project');
4338                 print_sort_th('descr', $order, 'Description');
4339                 print_sort_th('owner', $order, 'Owner');
4340                 print_sort_th('age', $order, 'Last Change');
4341                 print "<th></th>\n" . # for links
4342                       "</tr>\n";
4343         }
4344         my $alternate = 1;
4345         my $tagfilter = $cgi->param('by_tag');
4346         for (my $i = $from; $i <= $to; $i++) {
4347                 my $pr = $projects[$i];
4348
4349                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4350                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4351                         and not $pr->{'descr_long'} =~ /$searchtext/;
4352                 # Weed out forks or non-matching entries of search
4353                 if ($check_forks) {
4354                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4355                         $forkbase="^$forkbase" if $forkbase;
4356                         next if not $searchtext and not $tagfilter and $show_ctags
4357                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4358                 }
4359
4360                 if ($alternate) {
4361                         print "<tr class=\"dark\">\n";
4362                 } else {
4363                         print "<tr class=\"light\">\n";
4364                 }
4365                 $alternate ^= 1;
4366                 if ($check_forks) {
4367                         print "<td>";
4368                         if ($pr->{'forks'}) {
4369                                 print "<!-- $pr->{'forks'} -->\n";
4370                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4371                         }
4372                         print "</td>\n";
4373                 }
4374                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4375                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4376                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4377                                         -class => "list", -title => $pr->{'descr_long'}},
4378                                         esc_html($pr->{'descr'})) . "</td>\n" .
4379                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4380                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4381                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4382                       "<td class=\"link\">" .
4383                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4384                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4385                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4386                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4387                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4388                       "</td>\n" .
4389                       "</tr>\n";
4390         }
4391         if (defined $extra) {
4392                 print "<tr>\n";
4393                 if ($check_forks) {
4394                         print "<td></td>\n";
4395                 }
4396                 print "<td colspan=\"5\">$extra</td>\n" .
4397                       "</tr>\n";
4398         }
4399         print "</table>\n";
4400 }
4401
4402 sub git_shortlog_body {
4403         # uses global variable $project
4404         my ($commitlist, $from, $to, $refs, $extra) = @_;
4405
4406         $from = 0 unless defined $from;
4407         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4408
4409         print "<table class=\"shortlog\">\n";
4410         my $alternate = 1;
4411         for (my $i = $from; $i <= $to; $i++) {
4412                 my %co = %{$commitlist->[$i]};
4413                 my $commit = $co{'id'};
4414                 my $ref = format_ref_marker($refs, $commit);
4415                 if ($alternate) {
4416                         print "<tr class=\"dark\">\n";
4417                 } else {
4418                         print "<tr class=\"light\">\n";
4419                 }
4420                 $alternate ^= 1;
4421                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4422                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4423                       format_author_html('td', \%co, 10) . "<td>";
4424                 print format_subject_html($co{'title'}, $co{'title_short'},
4425                                           href(action=>"commit", hash=>$commit), $ref);
4426                 print "</td>\n" .
4427                       "<td class=\"link\">" .
4428                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4429                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4430                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4431                 my $snapshot_links = format_snapshot_links($commit);
4432                 if (defined $snapshot_links) {
4433                         print " | " . $snapshot_links;
4434                 }
4435                 print "</td>\n" .
4436                       "</tr>\n";
4437         }
4438         if (defined $extra) {
4439                 print "<tr>\n" .
4440                       "<td colspan=\"4\">$extra</td>\n" .
4441                       "</tr>\n";
4442         }
4443         print "</table>\n";
4444 }
4445
4446 sub git_history_body {
4447         # Warning: assumes constant type (blob or tree) during history
4448         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4449
4450         $from = 0 unless defined $from;
4451         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4452
4453         print "<table class=\"history\">\n";
4454         my $alternate = 1;
4455         for (my $i = $from; $i <= $to; $i++) {
4456                 my %co = %{$commitlist->[$i]};
4457                 if (!%co) {
4458                         next;
4459                 }
4460                 my $commit = $co{'id'};
4461
4462                 my $ref = format_ref_marker($refs, $commit);
4463
4464                 if ($alternate) {
4465                         print "<tr class=\"dark\">\n";
4466                 } else {
4467                         print "<tr class=\"light\">\n";
4468                 }
4469                 $alternate ^= 1;
4470                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4471         # shortlog:   format_author_html('td', \%co, 10)
4472                       format_author_html('td', \%co, 15, 3) . "<td>";
4473                 # originally git_history used chop_str($co{'title'}, 50)
4474                 print format_subject_html($co{'title'}, $co{'title_short'},
4475                                           href(action=>"commit", hash=>$commit), $ref);
4476                 print "</td>\n" .
4477                       "<td class=\"link\">" .
4478                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4479                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4480
4481                 if ($ftype eq 'blob') {
4482                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4483                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4484                         if (defined $blob_current && defined $blob_parent &&
4485                                         $blob_current ne $blob_parent) {
4486                                 print " | " .
4487                                         $cgi->a({-href => href(action=>"blobdiff",
4488                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4489                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4490                                                                file_name=>$file_name)},
4491                                                 "diff to current");
4492                         }
4493                 }
4494                 print "</td>\n" .
4495                       "</tr>\n";
4496         }
4497         if (defined $extra) {
4498                 print "<tr>\n" .
4499                       "<td colspan=\"4\">$extra</td>\n" .
4500                       "</tr>\n";
4501         }
4502         print "</table>\n";
4503 }
4504
4505 sub git_tags_body {
4506         # uses global variable $project
4507         my ($taglist, $from, $to, $extra) = @_;
4508         $from = 0 unless defined $from;
4509         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4510
4511         print "<table class=\"tags\">\n";
4512         my $alternate = 1;
4513         for (my $i = $from; $i <= $to; $i++) {
4514                 my $entry = $taglist->[$i];
4515                 my %tag = %$entry;
4516                 my $comment = $tag{'subject'};
4517                 my $comment_short;
4518                 if (defined $comment) {
4519                         $comment_short = chop_str($comment, 30, 5);
4520                 }
4521                 if ($alternate) {
4522                         print "<tr class=\"dark\">\n";
4523                 } else {
4524                         print "<tr class=\"light\">\n";
4525                 }
4526                 $alternate ^= 1;
4527                 if (defined $tag{'age'}) {
4528                         print "<td><i>$tag{'age'}</i></td>\n";
4529                 } else {
4530                         print "<td></td>\n";
4531                 }
4532                 print "<td>" .
4533                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4534                                -class => "list name"}, esc_html($tag{'name'})) .
4535                       "</td>\n" .
4536                       "<td>";
4537                 if (defined $comment) {
4538                         print format_subject_html($comment, $comment_short,
4539                                                   href(action=>"tag", hash=>$tag{'id'}));
4540                 }
4541                 print "</td>\n" .
4542                       "<td class=\"selflink\">";
4543                 if ($tag{'type'} eq "tag") {
4544                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4545                 } else {
4546                         print "&nbsp;";
4547                 }
4548                 print "</td>\n" .
4549                       "<td class=\"link\">" . " | " .
4550                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4551                 if ($tag{'reftype'} eq "commit") {
4552                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4553                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4554                 } elsif ($tag{'reftype'} eq "blob") {
4555                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4556                 }
4557                 print "</td>\n" .
4558                       "</tr>";
4559         }
4560         if (defined $extra) {
4561                 print "<tr>\n" .
4562                       "<td colspan=\"5\">$extra</td>\n" .
4563                       "</tr>\n";
4564         }
4565         print "</table>\n";
4566 }
4567
4568 sub git_heads_body {
4569         # uses global variable $project
4570         my ($headlist, $head, $from, $to, $extra) = @_;
4571         $from = 0 unless defined $from;
4572         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4573
4574         print "<table class=\"heads\">\n";
4575         my $alternate = 1;
4576         for (my $i = $from; $i <= $to; $i++) {
4577                 my $entry = $headlist->[$i];
4578                 my %ref = %$entry;
4579                 my $curr = $ref{'id'} eq $head;
4580                 if ($alternate) {
4581                         print "<tr class=\"dark\">\n";
4582                 } else {
4583                         print "<tr class=\"light\">\n";
4584                 }
4585                 $alternate ^= 1;
4586                 print "<td><i>$ref{'age'}</i></td>\n" .
4587                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4588                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4589                                -class => "list name"},esc_html($ref{'name'})) .
4590                       "</td>\n" .
4591                       "<td class=\"link\">" .
4592                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4593                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4594                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4595                       "</td>\n" .
4596                       "</tr>";
4597         }
4598         if (defined $extra) {
4599                 print "<tr>\n" .
4600                       "<td colspan=\"3\">$extra</td>\n" .
4601                       "</tr>\n";
4602         }
4603         print "</table>\n";
4604 }
4605
4606 sub git_search_grep_body {
4607         my ($commitlist, $from, $to, $extra) = @_;
4608         $from = 0 unless defined $from;
4609         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4610
4611         print "<table class=\"commit_search\">\n";
4612         my $alternate = 1;
4613         for (my $i = $from; $i <= $to; $i++) {
4614                 my %co = %{$commitlist->[$i]};
4615                 if (!%co) {
4616                         next;
4617                 }
4618                 my $commit = $co{'id'};
4619                 if ($alternate) {
4620                         print "<tr class=\"dark\">\n";
4621                 } else {
4622                         print "<tr class=\"light\">\n";
4623                 }
4624                 $alternate ^= 1;
4625                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4626                       format_author_html('td', \%co, 15, 5) .
4627                       "<td>" .
4628                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4629                                -class => "list subject"},
4630                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4631                 my $comment = $co{'comment'};
4632                 foreach my $line (@$comment) {
4633                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4634                                 my ($lead, $match, $trail) = ($1, $2, $3);
4635                                 $match = chop_str($match, 70, 5, 'center');
4636                                 my $contextlen = int((80 - length($match))/2);
4637                                 $contextlen = 30 if ($contextlen > 30);
4638                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4639                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4640
4641                                 $lead  = esc_html($lead);
4642                                 $match = esc_html($match);
4643                                 $trail = esc_html($trail);
4644
4645                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4646                         }
4647                 }
4648                 print "</td>\n" .
4649                       "<td class=\"link\">" .
4650                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4651                       " | " .
4652                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4653                       " | " .
4654                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4655                 print "</td>\n" .
4656                       "</tr>\n";
4657         }
4658         if (defined $extra) {
4659                 print "<tr>\n" .
4660                       "<td colspan=\"3\">$extra</td>\n" .
4661                       "</tr>\n";
4662         }
4663         print "</table>\n";
4664 }
4665
4666 ## ======================================================================
4667 ## ======================================================================
4668 ## actions
4669
4670 sub git_project_list {
4671         my $order = $input_params{'order'};
4672         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4673                 die_error(400, "Unknown order parameter");
4674         }
4675
4676         my @list = git_get_projects_list();
4677         if (!@list) {
4678                 die_error(404, "No projects found");
4679         }
4680
4681         git_header_html();
4682         if (-f $home_text) {
4683                 print "<div class=\"index_include\">\n";
4684                 insert_file($home_text);
4685                 print "</div>\n";
4686         }
4687         print $cgi->startform(-method => "get") .
4688               "<p class=\"projsearch\">Search:\n" .
4689               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4690               "</p>" .
4691               $cgi->end_form() . "\n";
4692         git_project_list_body(\@list, $order);
4693         git_footer_html();
4694 }
4695
4696 sub git_forks {
4697         my $order = $input_params{'order'};
4698         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4699                 die_error(400, "Unknown order parameter");
4700         }
4701
4702         my @list = git_get_projects_list($project);
4703         if (!@list) {
4704                 die_error(404, "No forks found");
4705         }
4706
4707         git_header_html();
4708         git_print_page_nav('','');
4709         git_print_header_div('summary', "$project forks");
4710         git_project_list_body(\@list, $order);
4711         git_footer_html();
4712 }
4713
4714 sub git_project_index {
4715         my @projects = git_get_projects_list($project);
4716
4717         print $cgi->header(
4718                 -type => 'text/plain',
4719                 -charset => 'utf-8',
4720                 -content_disposition => 'inline; filename="index.aux"');
4721
4722         foreach my $pr (@projects) {
4723                 if (!exists $pr->{'owner'}) {
4724                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4725                 }
4726
4727                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4728                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4729                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4730                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4731                 $path  =~ s/ /\+/g;
4732                 $owner =~ s/ /\+/g;
4733
4734                 print "$path $owner\n";
4735         }
4736 }
4737
4738 sub git_summary {
4739         my $descr = git_get_project_description($project) || "none";
4740         my %co = parse_commit("HEAD");
4741         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4742         my $head = $co{'id'};
4743
4744         my $owner = git_get_project_owner($project);
4745
4746         my $refs = git_get_references();
4747         # These get_*_list functions return one more to allow us to see if
4748         # there are more ...
4749         my @taglist  = git_get_tags_list(16);
4750         my @headlist = git_get_heads_list(16);
4751         my @forklist;
4752         my $check_forks = gitweb_check_feature('forks');
4753
4754         if ($check_forks) {
4755                 @forklist = git_get_projects_list($project);
4756         }
4757
4758         git_header_html();
4759         git_print_page_nav('summary','', $head);
4760
4761         print "<div class=\"title\">&nbsp;</div>\n";
4762         print "<table class=\"projects_list\">\n" .
4763               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4764               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4765         if (defined $cd{'rfc2822'}) {
4766                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4767         }
4768
4769         # use per project git URL list in $projectroot/$project/cloneurl
4770         # or make project git URL from git base URL and project name
4771         my $url_tag = "URL";
4772         my @url_list = git_get_project_url_list($project);
4773         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4774         foreach my $git_url (@url_list) {
4775                 next unless $git_url;
4776                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4777                 $url_tag = "";
4778         }
4779
4780         # Tag cloud
4781         my $show_ctags = gitweb_check_feature('ctags');
4782         if ($show_ctags) {
4783                 my $ctags = git_get_project_ctags($project);
4784                 my $cloud = git_populate_project_tagcloud($ctags);
4785                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4786                 print "</td>\n<td>" unless %$ctags;
4787                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4788                 print "</td>\n<td>" if %$ctags;
4789                 print git_show_project_tagcloud($cloud, 48);
4790                 print "</td></tr>";
4791         }
4792
4793         print "</table>\n";
4794
4795         # If XSS prevention is on, we don't include README.html.
4796         # TODO: Allow a readme in some safe format.
4797         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4798                 print "<div class=\"title\">readme</div>\n" .
4799                       "<div class=\"readme\">\n";
4800                 insert_file("$projectroot/$project/README.html");
4801                 print "\n</div>\n"; # class="readme"
4802         }
4803
4804         # we need to request one more than 16 (0..15) to check if
4805         # those 16 are all
4806         my @commitlist = $head ? parse_commits($head, 17) : ();
4807         if (@commitlist) {
4808                 git_print_header_div('shortlog');
4809                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4810                                   $#commitlist <=  15 ? undef :
4811                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4812         }
4813
4814         if (@taglist) {
4815                 git_print_header_div('tags');
4816                 git_tags_body(\@taglist, 0, 15,
4817                               $#taglist <=  15 ? undef :
4818                               $cgi->a({-href => href(action=>"tags")}, "..."));
4819         }
4820
4821         if (@headlist) {
4822                 git_print_header_div('heads');
4823                 git_heads_body(\@headlist, $head, 0, 15,
4824                                $#headlist <= 15 ? undef :
4825                                $cgi->a({-href => href(action=>"heads")}, "..."));
4826         }
4827
4828         if (@forklist) {
4829                 git_print_header_div('forks');
4830                 git_project_list_body(\@forklist, 'age', 0, 15,
4831                                       $#forklist <= 15 ? undef :
4832                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4833                                       'no_header');
4834         }
4835
4836         git_footer_html();
4837 }
4838
4839 sub git_tag {
4840         my $head = git_get_head_hash($project);
4841         git_header_html();
4842         git_print_page_nav('','', $head,undef,$head);
4843         my %tag = parse_tag($hash);
4844
4845         if (! %tag) {
4846                 die_error(404, "Unknown tag object");
4847         }
4848
4849         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4850         print "<div class=\"title_text\">\n" .
4851               "<table class=\"object_header\">\n" .
4852               "<tr>\n" .
4853               "<td>object</td>\n" .
4854               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4855                                $tag{'object'}) . "</td>\n" .
4856               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4857                                               $tag{'type'}) . "</td>\n" .
4858               "</tr>\n";
4859         if (defined($tag{'author'})) {
4860                 git_print_authorship_rows(\%tag, 'author');
4861         }
4862         print "</table>\n\n" .
4863               "</div>\n";
4864         print "<div class=\"page_body\">";
4865         my $comment = $tag{'comment'};
4866         foreach my $line (@$comment) {
4867                 chomp $line;
4868                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4869         }
4870         print "</div>\n";
4871         git_footer_html();
4872 }
4873
4874 sub git_blame_data {
4875         my $ftype;
4876
4877         my ($have_blame) = gitweb_check_feature('blame');
4878         if (!$have_blame) {
4879                 die_error('403 Permission denied', "Permission denied");
4880         }
4881         die_error('404 Not Found', "File name not defined") if (!$file_name);
4882         $hash_base ||= git_get_head_hash($project);
4883         die_error(undef, "Couldn't find base commit") unless ($hash_base);
4884         my %co = parse_commit($hash_base)
4885                 or die_error(undef, "Reading commit failed");
4886         if (!defined $hash) {
4887                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4888                         or die_error(undef, "Error looking up file");
4889         }
4890         $ftype = git_get_type($hash);
4891         if ($ftype !~ "blob") {
4892                 die_error("400 Bad Request", "Object is not a blob");
4893         }
4894         open my $fd, "-|", git_cmd(), "blame", '--incremental',
4895                 $hash_base, '--', $file_name
4896                 or die_error(undef, "Open git-blame --incremental failed");
4897
4898         print $cgi->header(-type=>"text/plain", -charset => 'utf-8',
4899                            -status=> "200 OK");
4900
4901         while(<$fd>) {
4902           if (/^([0-9a-f]{40}) ([0-9]+) ([0-9]+) ([0-9]+)/ or
4903              /^author-time |^author |^filename /) {
4904             print;
4905           }
4906         }
4907
4908         close $fd or print "Reading blame data failed\n";
4909 }
4910
4911 sub git_blame_common {
4912         my ($type) = @_;
4913
4914         # permissions
4915         gitweb_check_feature('blame')
4916                 or die_error(403, "Blame view not allowed");
4917
4918         # error checking
4919         die_error(400, "No file name given") unless $file_name;
4920         $hash_base ||= git_get_head_hash($project);
4921         die_error(404, "Couldn't find base commit") unless $hash_base;
4922         my %co = parse_commit($hash_base)
4923                 or die_error(404, "Commit not found");
4924         my $ftype = "blob";
4925         if (!defined $hash) {
4926                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4927                         or die_error(404, "Error looking up file");
4928         } else {
4929                 $ftype = git_get_type($hash);
4930                 if ($ftype !~ "blob") {
4931                         die_error(400, "Object is not a blob");
4932                 }
4933         }
4934         $ftype = git_get_type($hash);
4935         if ($ftype !~ "blob") {
4936                 die_error(400, "Object is not a blob");
4937         }
4938         my $fd;
4939         if ($type eq 'incremental') {
4940                 open $fd, "-|", git_cmd(), 'cat-file', 'blob', $hash
4941                         or die_error(undef, "Open git-cat-file failed");
4942         } else {
4943                 # run git-blame --porcelain
4944                 open $fd, "-|", git_cmd(), "blame", '-p',
4945                         $hash_base, '--', $file_name
4946                         or die_error(500, "Open git-blame failed");
4947         }
4948
4949         # page header
4950         git_header_html();
4951         my $formats_nav =
4952                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4953                         "blob") .
4954                 " | " .
4955                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4956                         "history") .
4957                 " | " .
4958                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name), -class => "blamelink"},
4959                         "HEAD");
4960         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4961         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4962         git_print_page_path($file_name, $ftype, $hash_base);
4963
4964         # page body
4965         my @rev_color = qw(light dark);
4966         my $num_colors = scalar(@rev_color);
4967         my $current_color = 0;
4968         my %metainfo = ();
4969
4970         print <<HTML;
4971
4972 <div class="page_body">
4973 <table class="blame">
4974 <tr><th>Commit&nbsp;<a href="javascript:extra_blame_columns()" id="columns_expander">[+]</a></th>
4975 <th class="extra_column">Author</th>
4976 <th class="extra_column">Date</th>
4977 <th>Line</th>
4978 <th>Data</th></tr>
4979 HTML
4980  LINE:
4981         my $linenr = 0;
4982         while (my $line = <$fd>) {
4983                 chomp $line;
4984                 if ($type eq 'incremental') {
4985                         # Empty stage with just the file contents
4986                         $linenr += 1;
4987                         print "<tr id=\"l$linenr\" class=\"light2\">";
4988                         print '<td class="sha1"><a href=""></a></td>';
4989                         print "<td class=\"extra_column\"></td>";
4990                         print "<td class=\"extra_column\"></td>";
4991                         print "<td class=\"linenr\"><a class=\"linenr\" href=\"\">$linenr</a></td><td class=\"pre\">" . esc_html($line) . "</td>\n";
4992                         print "</tr>\n";
4993                         next;
4994                 }
4995
4996                 # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
4997                 # no <lines in group> for subsequent lines in group of lines
4998                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4999                    ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
5000                 if (!exists $metainfo{$full_rev}) {
5001                         $metainfo{$full_rev} = { 'nprevious' => 0 };
5002                 }
5003                 my $meta = $metainfo{$full_rev};
5004                 my $data;
5005                 while ($data = <$fd>) {
5006                         chomp $data;
5007                         last if ($data =~ s/^\t//); # contents of line
5008                         if ($data =~ /^(\S+)(?: (.*))?$/) {
5009                                 $meta->{$1} = $2 unless exists $meta->{$1};
5010                         }
5011                         if ($data =~ /^previous /) {
5012                                 $meta->{'nprevious'}++;
5013                         }
5014                 }
5015                 my $short_rev = substr($full_rev, 0, 8);
5016                 my $author = $meta->{'author'};
5017                 my %date =
5018                         parse_date($meta->{'author-time'}, $meta->{'author-tz'});
5019                 my $date = $date{'iso-tz'};
5020                 if ($group_size) {
5021                         $current_color = ($current_color + 1) % $num_colors;
5022                 }
5023                 my $tr_class = $rev_color[$current_color];
5024                 $tr_class .= ' boundary' if (exists $meta->{'boundary'});
5025                 $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
5026                 $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
5027                 print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
5028                 if ($group_size) {
5029                         my $rowspan = $group_size > 1 ? " rowspan=\"$group_size\"" : "";
5030                         print "<td class=\"sha1\"";
5031                         print " title=\"". esc_html($author) . ", $date\"";
5032                         print "$rowspan>";
5033                         print $cgi->a({-href => href(action=>"commit",
5034                                                      hash=>$full_rev,
5035                                                      file_name=>$file_name)},
5036                                       esc_html($short_rev));
5037                         if ($group_size >= 2) {
5038                                 my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
5039                                 if (@author_initials) {
5040                                         print "<br />" .
5041                                               esc_html(join('', @author_initials));
5042                                         #           or join('.', ...)
5043                                 }
5044                         }
5045                         print "</td>\n";
5046                         print "<td class=\"extra_column\" $rowspan>". esc_html($author) . "</td>";
5047                         print "<td class=\"extra_column\" $rowspan>". $date . "</td>";
5048                 }
5049                 # 'previous' <sha1 of parent commit> <filename at commit>
5050                 if (exists $meta->{'previous'} &&
5051                     $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
5052                         $meta->{'parent'} = $1;
5053                         $meta->{'file_parent'} = unquote($2);
5054                 }
5055                 my $linenr_commit =
5056                         exists($meta->{'parent'}) ?
5057                         $meta->{'parent'} : $full_rev;
5058                 my $linenr_filename =
5059                         exists($meta->{'file_parent'}) ?
5060                         $meta->{'file_parent'} : unquote($meta->{'filename'});
5061                 my $blamed = href(action => 'blame',
5062                                   file_name => $linenr_filename,
5063                                   hash_base => $linenr_commit);
5064                 print "<td class=\"linenr\">";
5065                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
5066                                 -class => "linenr" },
5067                               esc_html($lineno));
5068                 print "</td>";
5069                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
5070                 print "</tr>\n";
5071         }
5072
5073         print "</table>\n";
5074         print "</div>";
5075         close $fd
5076                 or print "Reading blob failed\n";
5077
5078         if ($type eq 'incremental') {
5079                 print "<script type=\"text/javascript\">\n";
5080                 print "startBlame(\"" . href(action=>"blame_data", hash_base=>$hash_base, file_name=>$file_name) . "\", \"" .
5081                   href(-partial_query=>1) . "\");\n";
5082                 print "</script>\n";
5083         }
5084
5085         # page footer
5086         git_footer_html();
5087 }
5088
5089 sub git_blame_incremental {
5090         git_blame_common('incremental');
5091 }
5092
5093 sub git_blame {
5094         git_blame_common('oneshot');
5095 }
5096
5097 sub git_tags {
5098         my $head = git_get_head_hash($project);
5099         git_header_html();
5100         git_print_page_nav('','', $head,undef,$head);
5101         git_print_header_div('summary', $project);
5102
5103         my @tagslist = git_get_tags_list();
5104         if (@tagslist) {
5105                 git_tags_body(\@tagslist);
5106         }
5107         git_footer_html();
5108 }
5109
5110 sub git_heads {
5111         my $head = git_get_head_hash($project);
5112         git_header_html();
5113         git_print_page_nav('','', $head,undef,$head);
5114         git_print_header_div('summary', $project);
5115
5116         my @headslist = git_get_heads_list();
5117         if (@headslist) {
5118                 git_heads_body(\@headslist, $head);
5119         }
5120         git_footer_html();
5121 }
5122
5123 sub git_blob_plain {
5124         my $type = shift;
5125         my $expires;
5126
5127         if (!defined $hash) {
5128                 if (defined $file_name) {
5129                         my $base = $hash_base || git_get_head_hash($project);
5130                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5131                                 or die_error(404, "Cannot find file");
5132                 } else {
5133                         die_error(400, "No file name defined");
5134                 }
5135         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5136                 # blobs defined by non-textual hash id's can be cached
5137                 $expires = "+1d";
5138         }
5139
5140         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5141                 or die_error(500, "Open git-cat-file blob '$hash' failed");
5142
5143         # content-type (can include charset)
5144         $type = blob_contenttype($fd, $file_name, $type);
5145
5146         # "save as" filename, even when no $file_name is given
5147         my $save_as = "$hash";
5148         if (defined $file_name) {
5149                 $save_as = $file_name;
5150         } elsif ($type =~ m/^text\//) {
5151                 $save_as .= '.txt';
5152         }
5153
5154         # With XSS prevention on, blobs of all types except a few known safe
5155         # ones are served with "Content-Disposition: attachment" to make sure
5156         # they don't run in our security domain.  For certain image types,
5157         # blob view writes an <img> tag referring to blob_plain view, and we
5158         # want to be sure not to break that by serving the image as an
5159         # attachment (though Firefox 3 doesn't seem to care).
5160         my $sandbox = $prevent_xss &&
5161                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
5162
5163         print $cgi->header(
5164                 -type => $type,
5165                 -expires => $expires,
5166                 -content_disposition =>
5167                         ($sandbox ? 'attachment' : 'inline')
5168                         . '; filename="' . $save_as . '"');
5169         local $/ = undef;
5170         binmode STDOUT, ':raw';
5171         print <$fd>;
5172         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5173         close $fd;
5174 }
5175
5176 sub git_blob {
5177         my $expires;
5178
5179         if (!defined $hash) {
5180                 if (defined $file_name) {
5181                         my $base = $hash_base || git_get_head_hash($project);
5182                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5183                                 or die_error(404, "Cannot find file");
5184                 } else {
5185                         die_error(400, "No file name defined");
5186                 }
5187         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5188                 # blobs defined by non-textual hash id's can be cached
5189                 $expires = "+1d";
5190         }
5191
5192         my $have_blame = gitweb_check_feature('blame');
5193         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5194                 or die_error(500, "Couldn't cat $file_name, $hash");
5195         my $mimetype = blob_mimetype($fd, $file_name);
5196         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5197                 close $fd;
5198                 return git_blob_plain($mimetype);
5199         }
5200         # we can have blame only for text/* mimetype
5201         $have_blame &&= ($mimetype =~ m!^text/!);
5202
5203         git_header_html(undef, $expires);
5204         my $formats_nav = '';
5205         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5206                 if (defined $file_name) {
5207                         if ($have_blame) {
5208                                 $formats_nav .=
5209                                         $cgi->a({-href => href(action=>"blame", -replay=>1,
5210                                                                -class => "blamelink")},
5211                                                 "blame") .
5212                                         " | ";
5213                         }
5214                         $formats_nav .=
5215                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5216                                         "history") .
5217                                 " | " .
5218                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5219                                         "raw") .
5220                                 " | " .
5221                                 $cgi->a({-href => href(action=>"blob",
5222                                                        hash_base=>"HEAD", file_name=>$file_name)},
5223                                         "HEAD");
5224                 } else {
5225                         $formats_nav .=
5226                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5227                                         "raw");
5228                 }
5229                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5230                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5231         } else {
5232                 print "<div class=\"page_nav\">\n" .
5233                       "<br/><br/></div>\n" .
5234                       "<div class=\"title\">$hash</div>\n";
5235         }
5236         git_print_page_path($file_name, "blob", $hash_base);
5237         print "<div class=\"page_body\">\n";
5238         if ($mimetype =~ m!^image/!) {
5239                 print qq!<img type="$mimetype"!;
5240                 if ($file_name) {
5241                         print qq! alt="$file_name" title="$file_name"!;
5242                 }
5243                 print qq! src="! .
5244                       href(action=>"blob_plain", hash=>$hash,
5245                            hash_base=>$hash_base, file_name=>$file_name) .
5246                       qq!" />\n!;
5247         } else {
5248                 my $nr;
5249                 while (my $line = <$fd>) {
5250                         chomp $line;
5251                         $nr++;
5252                         $line = untabify($line);
5253                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
5254                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
5255                 }
5256         }
5257         close $fd
5258                 or print "Reading blob failed.\n";
5259         print "</div>";
5260         git_footer_html();
5261 }
5262
5263 sub git_tree {
5264         if (!defined $hash_base) {
5265                 $hash_base = "HEAD";
5266         }
5267         if (!defined $hash) {
5268                 if (defined $file_name) {
5269                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5270                 } else {
5271                         $hash = $hash_base;
5272                 }
5273         }
5274         die_error(404, "No such tree") unless defined($hash);
5275
5276         my $show_sizes = gitweb_check_feature('show-sizes');
5277         my $have_blame = gitweb_check_feature('blame');
5278
5279         my @entries = ();
5280         {
5281                 local $/ = "\0";
5282                 open my $fd, "-|", git_cmd(), "ls-tree", '-z',
5283                         ($show_sizes ? '-l' : ()), @extra_options, $hash
5284                         or die_error(500, "Open git-ls-tree failed");
5285                 @entries = map { chomp; $_ } <$fd>;
5286                 close $fd
5287                         or die_error(404, "Reading tree failed");
5288         }
5289
5290         my $refs = git_get_references();
5291         my $ref = format_ref_marker($refs, $hash_base);
5292         git_header_html();
5293         my $basedir = '';
5294         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5295                 my @views_nav = ();
5296                 if (defined $file_name) {
5297                         push @views_nav,
5298                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5299                                         "history"),
5300                                 $cgi->a({-href => href(action=>"tree",
5301                                                        hash_base=>"HEAD", file_name=>$file_name)},
5302                                         "HEAD"),
5303                 }
5304                 my $snapshot_links = format_snapshot_links($hash);
5305                 if (defined $snapshot_links) {
5306                         # FIXME: Should be available when we have no hash base as well.
5307                         push @views_nav, $snapshot_links;
5308                 }
5309                 git_print_page_nav('tree','', $hash_base, undef, undef,
5310                                    join(' | ', @views_nav));
5311                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5312         } else {
5313                 undef $hash_base;
5314                 print "<div class=\"page_nav\">\n";
5315                 print "<br/><br/></div>\n";
5316                 print "<div class=\"title\">$hash</div>\n";
5317         }
5318         if (defined $file_name) {
5319                 $basedir = $file_name;
5320                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5321                         $basedir .= '/';
5322                 }
5323                 git_print_page_path($file_name, 'tree', $hash_base);
5324         }
5325         print "<div class=\"page_body\">\n";
5326         print "<table class=\"tree\">\n";
5327         my $alternate = 1;
5328         # '..' (top directory) link if possible
5329         if (defined $hash_base &&
5330             defined $file_name && $file_name =~ m![^/]+$!) {
5331                 if ($alternate) {
5332                         print "<tr class=\"dark\">\n";
5333                 } else {
5334                         print "<tr class=\"light\">\n";
5335                 }
5336                 $alternate ^= 1;
5337
5338                 my $up = $file_name;
5339                 $up =~ s!/?[^/]+$!!;
5340                 undef $up unless $up;
5341                 # based on git_print_tree_entry
5342                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5343                 print '<td class="size">&nbsp;</td>'."\n" if $show_sizes;
5344                 print '<td class="list">';
5345                 print $cgi->a({-href => href(action=>"tree",
5346                                              hash_base=>$hash_base,
5347                                              file_name=>$up)},
5348                               "..");
5349                 print "</td>\n";
5350                 print "<td class=\"link\"></td>\n";
5351
5352                 print "</tr>\n";
5353         }
5354         foreach my $line (@entries) {
5355                 my %t = parse_ls_tree_line($line, -z => 1, -l => $show_sizes);
5356
5357                 if ($alternate) {
5358                         print "<tr class=\"dark\">\n";
5359                 } else {
5360                         print "<tr class=\"light\">\n";
5361                 }
5362                 $alternate ^= 1;
5363
5364                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5365
5366                 print "</tr>\n";
5367         }
5368         print "</table>\n" .
5369               "</div>";
5370         git_footer_html();
5371 }
5372
5373 sub git_snapshot {
5374         my $format = $input_params{'snapshot_format'};
5375         if (!@snapshot_fmts) {
5376                 die_error(403, "Snapshots not allowed");
5377         }
5378         # default to first supported snapshot format
5379         $format ||= $snapshot_fmts[0];
5380         if ($format !~ m/^[a-z0-9]+$/) {
5381                 die_error(400, "Invalid snapshot format parameter");
5382         } elsif (!exists($known_snapshot_formats{$format})) {
5383                 die_error(400, "Unknown snapshot format");
5384         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5385                 die_error(403, "Snapshot format not allowed");
5386         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5387                 die_error(403, "Unsupported snapshot format");
5388         }
5389
5390         if (!defined $hash) {
5391                 $hash = git_get_head_hash($project);
5392         }
5393
5394         my $name = $project;
5395         $name =~ s,([^/])/*\.git$,$1,;
5396         $name = basename($name);
5397         my $filename = to_utf8($name);
5398         $name =~ s/\047/\047\\\047\047/g;
5399         my $cmd;
5400         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
5401         $cmd = quote_command(
5402                 git_cmd(), 'archive',
5403                 "--format=$known_snapshot_formats{$format}{'format'}",
5404                 "--prefix=$name/", $hash);
5405         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5406                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5407         }
5408
5409         print $cgi->header(
5410                 -type => $known_snapshot_formats{$format}{'type'},
5411                 -content_disposition => 'inline; filename="' . "$filename" . '"',
5412                 -status => '200 OK');
5413
5414         open my $fd, "-|", $cmd
5415                 or die_error(500, "Execute git-archive failed");
5416         binmode STDOUT, ':raw';
5417         print <$fd>;
5418         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5419         close $fd;
5420 }
5421
5422 sub git_log {
5423         my $head = git_get_head_hash($project);
5424         if (!defined $hash) {
5425                 $hash = $head;
5426         }
5427         if (!defined $page) {
5428                 $page = 0;
5429         }
5430         my $refs = git_get_references();
5431
5432         my @commitlist = parse_commits($hash, 101, (100 * $page));
5433
5434         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
5435
5436         my ($patch_max) = gitweb_get_feature('patches');
5437         if ($patch_max) {
5438                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5439                         $paging_nav .= " &sdot; " .
5440                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5441                                         "patches");
5442                 }
5443         }
5444
5445         git_header_html();
5446         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5447
5448         if (!@commitlist) {
5449                 my %co = parse_commit($hash);
5450
5451                 git_print_header_div('summary', $project);
5452                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5453         }
5454         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5455         for (my $i = 0; $i <= $to; $i++) {
5456                 my %co = %{$commitlist[$i]};
5457                 next if !%co;
5458                 my $commit = $co{'id'};
5459                 my $ref = format_ref_marker($refs, $commit);
5460                 my %ad = parse_date($co{'author_epoch'});
5461                 git_print_header_div('commit',
5462                                "<span class=\"age\">$co{'age_string'}</span>" .
5463                                esc_html($co{'title'}) . $ref,
5464                                $commit);
5465                 print "<div class=\"title_text\">\n" .
5466                       "<div class=\"log_link\">\n" .
5467                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5468                       " | " .
5469                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5470                       " | " .
5471                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5472                       "<br/>\n" .
5473                       "</div>\n";
5474                       git_print_authorship(\%co, -tag => 'span');
5475                       print "<br/>\n</div>\n";
5476
5477                 print "<div class=\"log_body\">\n";
5478                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5479                 print "</div>\n";
5480         }
5481         if ($#commitlist >= 100) {
5482                 print "<div class=\"page_nav\">\n";
5483                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5484                                -accesskey => "n", -title => "Alt-n"}, "next");
5485                 print "</div>\n";
5486         }
5487         git_footer_html();
5488 }
5489
5490 sub git_commit {
5491         $hash ||= $hash_base || "HEAD";
5492         my %co = parse_commit($hash)
5493             or die_error(404, "Unknown commit object");
5494
5495         my $parent  = $co{'parent'};
5496         my $parents = $co{'parents'}; # listref
5497
5498         # we need to prepare $formats_nav before any parameter munging
5499         my $formats_nav;
5500         if (!defined $parent) {
5501                 # --root commitdiff
5502                 $formats_nav .= '(initial)';
5503         } elsif (@$parents == 1) {
5504                 # single parent commit
5505                 $formats_nav .=
5506                         '(parent: ' .
5507                         $cgi->a({-href => href(action=>"commit",
5508                                                hash=>$parent)},
5509                                 esc_html(substr($parent, 0, 7))) .
5510                         ')';
5511         } else {
5512                 # merge commit
5513                 $formats_nav .=
5514                         '(merge: ' .
5515                         join(' ', map {
5516                                 $cgi->a({-href => href(action=>"commit",
5517                                                        hash=>$_)},
5518                                         esc_html(substr($_, 0, 7)));
5519                         } @$parents ) .
5520                         ')';
5521         }
5522         if (gitweb_check_feature('patches') && @$parents <= 1) {
5523                 $formats_nav .= " | " .
5524                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5525                                 "patch");
5526         }
5527
5528         if (!defined $parent) {
5529                 $parent = "--root";
5530         }
5531         my @difftree;
5532         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5533                 @diff_opts,
5534                 (@$parents <= 1 ? $parent : '-c'),
5535                 $hash, "--"
5536                 or die_error(500, "Open git-diff-tree failed");
5537         @difftree = map { chomp; $_ } <$fd>;
5538         close $fd or die_error(404, "Reading git-diff-tree failed");
5539
5540         # non-textual hash id's can be cached
5541         my $expires;
5542         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5543                 $expires = "+1d";
5544         }
5545         my $refs = git_get_references();
5546         my $ref = format_ref_marker($refs, $co{'id'});
5547
5548         git_header_html(undef, $expires);
5549         git_print_page_nav('commit', '',
5550                            $hash, $co{'tree'}, $hash,
5551                            $formats_nav);
5552
5553         if (defined $co{'parent'}) {
5554                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5555         } else {
5556                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5557         }
5558         print "<div class=\"title_text\">\n" .
5559               "<table class=\"object_header\">\n";
5560         git_print_authorship_rows(\%co);
5561         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5562         print "<tr>" .
5563               "<td>tree</td>" .
5564               "<td class=\"sha1\">" .
5565               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5566                        class => "list"}, $co{'tree'}) .
5567               "</td>" .
5568               "<td class=\"link\">" .
5569               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5570                       "tree");
5571         my $snapshot_links = format_snapshot_links($hash);
5572         if (defined $snapshot_links) {
5573                 print " | " . $snapshot_links;
5574         }
5575         print "</td>" .
5576               "</tr>\n";
5577
5578         foreach my $par (@$parents) {
5579                 print "<tr>" .
5580                       "<td>parent</td>" .
5581                       "<td class=\"sha1\">" .
5582                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5583                                class => "list"}, $par) .
5584                       "</td>" .
5585                       "<td class=\"link\">" .
5586                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5587                       " | " .
5588                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5589                       "</td>" .
5590                       "</tr>\n";
5591         }
5592         print "</table>".
5593               "</div>\n";
5594
5595         print "<div class=\"page_body\">\n";
5596         git_print_log($co{'comment'});
5597         print "</div>\n";
5598
5599         git_difftree_body(\@difftree, $hash, @$parents);
5600
5601         git_footer_html();
5602 }
5603
5604 sub git_object {
5605         # object is defined by:
5606         # - hash or hash_base alone
5607         # - hash_base and file_name
5608         my $type;
5609
5610         # - hash or hash_base alone
5611         if ($hash || ($hash_base && !defined $file_name)) {
5612                 my $object_id = $hash || $hash_base;
5613
5614                 open my $fd, "-|", quote_command(
5615                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5616                         or die_error(404, "Object does not exist");
5617                 $type = <$fd>;
5618                 chomp $type;
5619                 close $fd
5620                         or die_error(404, "Object does not exist");
5621
5622         # - hash_base and file_name
5623         } elsif ($hash_base && defined $file_name) {
5624                 $file_name =~ s,/+$,,;
5625
5626                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5627                         or die_error(404, "Base object does not exist");
5628
5629                 # here errors should not hapen
5630                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5631                         or die_error(500, "Open git-ls-tree failed");
5632                 my $line = <$fd>;
5633                 close $fd;
5634
5635                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5636                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5637                         die_error(404, "File or directory for given base does not exist");
5638                 }
5639                 $type = $2;
5640                 $hash = $3;
5641         } else {
5642                 die_error(400, "Not enough information to find object");
5643         }
5644
5645         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5646                                           hash=>$hash, hash_base=>$hash_base,
5647                                           file_name=>$file_name),
5648                              -status => '302 Found');
5649 }
5650
5651 sub git_blobdiff {
5652         my $format = shift || 'html';
5653
5654         my $fd;
5655         my @difftree;
5656         my %diffinfo;
5657         my $expires;
5658
5659         # preparing $fd and %diffinfo for git_patchset_body
5660         # new style URI
5661         if (defined $hash_base && defined $hash_parent_base) {
5662                 if (defined $file_name) {
5663                         # read raw output
5664                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5665                                 $hash_parent_base, $hash_base,
5666                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5667                                 or die_error(500, "Open git-diff-tree failed");
5668                         @difftree = map { chomp; $_ } <$fd>;
5669                         close $fd
5670                                 or die_error(404, "Reading git-diff-tree failed");
5671                         @difftree
5672                                 or die_error(404, "Blob diff not found");
5673
5674                 } elsif (defined $hash &&
5675                          $hash =~ /[0-9a-fA-F]{40}/) {
5676                         # try to find filename from $hash
5677
5678                         # read filtered raw output
5679                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5680                                 $hash_parent_base, $hash_base, "--"
5681                                 or die_error(500, "Open git-diff-tree failed");
5682                         @difftree =
5683                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5684                                 # $hash == to_id
5685                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5686                                 map { chomp; $_ } <$fd>;
5687                         close $fd
5688                                 or die_error(404, "Reading git-diff-tree failed");
5689                         @difftree
5690                                 or die_error(404, "Blob diff not found");
5691
5692                 } else {
5693                         die_error(400, "Missing one of the blob diff parameters");
5694                 }
5695
5696                 if (@difftree > 1) {
5697                         die_error(400, "Ambiguous blob diff specification");
5698                 }
5699
5700                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5701                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5702                 $file_name   ||= $diffinfo{'to_file'};
5703
5704                 $hash_parent ||= $diffinfo{'from_id'};
5705                 $hash        ||= $diffinfo{'to_id'};
5706
5707                 # non-textual hash id's can be cached
5708                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5709                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5710                         $expires = '+1d';
5711                 }
5712
5713                 # open patch output
5714                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5715                         '-p', ($format eq 'html' ? "--full-index" : ()),
5716                         $hash_parent_base, $hash_base,
5717                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5718                         or die_error(500, "Open git-diff-tree failed");
5719         }
5720
5721         # old/legacy style URI -- not generated anymore since 1.4.3.
5722         if (!%diffinfo) {
5723                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5724         }
5725
5726         # header
5727         if ($format eq 'html') {
5728                 my $formats_nav =
5729                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5730                                 "raw");
5731                 git_header_html(undef, $expires);
5732                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5733                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5734                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5735                 } else {
5736                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5737                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5738                 }
5739                 if (defined $file_name) {
5740                         git_print_page_path($file_name, "blob", $hash_base);
5741                 } else {
5742                         print "<div class=\"page_path\"></div>\n";
5743                 }
5744
5745         } elsif ($format eq 'plain') {
5746                 print $cgi->header(
5747                         -type => 'text/plain',
5748                         -charset => 'utf-8',
5749                         -expires => $expires,
5750                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5751
5752                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5753
5754         } else {
5755                 die_error(400, "Unknown blobdiff format");
5756         }
5757
5758         # patch
5759         if ($format eq 'html') {
5760                 print "<div class=\"page_body\">\n";
5761
5762                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5763                 close $fd;
5764
5765                 print "</div>\n"; # class="page_body"
5766                 git_footer_html();
5767
5768         } else {
5769                 while (my $line = <$fd>) {
5770                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5771                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5772
5773                         print $line;
5774
5775                         last if $line =~ m!^\+\+\+!;
5776                 }
5777                 local $/ = undef;
5778                 print <$fd>;
5779                 close $fd;
5780         }
5781 }
5782
5783 sub git_blobdiff_plain {
5784         git_blobdiff('plain');
5785 }
5786
5787 sub git_commitdiff {
5788         my %params = @_;
5789         my $format = $params{-format} || 'html';
5790
5791         my ($patch_max) = gitweb_get_feature('patches');
5792         if ($format eq 'patch') {
5793                 die_error(403, "Patch view not allowed") unless $patch_max;
5794         }
5795
5796         $hash ||= $hash_base || "HEAD";
5797         my %co = parse_commit($hash)
5798             or die_error(404, "Unknown commit object");
5799
5800         # choose format for commitdiff for merge
5801         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5802                 $hash_parent = '--cc';
5803         }
5804         # we need to prepare $formats_nav before almost any parameter munging
5805         my $formats_nav;
5806         if ($format eq 'html') {
5807                 $formats_nav =
5808                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5809                                 "raw");
5810                 if ($patch_max && @{$co{'parents'}} <= 1) {
5811                         $formats_nav .= " | " .
5812                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5813                                         "patch");
5814                 }
5815
5816                 if (defined $hash_parent &&
5817                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5818                         # commitdiff with two commits given
5819                         my $hash_parent_short = $hash_parent;
5820                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5821                                 $hash_parent_short = substr($hash_parent, 0, 7);
5822                         }
5823                         $formats_nav .=
5824                                 ' (from';
5825                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5826                                 if ($co{'parents'}[$i] eq $hash_parent) {
5827                                         $formats_nav .= ' parent ' . ($i+1);
5828                                         last;
5829                                 }
5830                         }
5831                         $formats_nav .= ': ' .
5832                                 $cgi->a({-href => href(action=>"commitdiff",
5833                                                        hash=>$hash_parent)},
5834                                         esc_html($hash_parent_short)) .
5835                                 ')';
5836                 } elsif (!$co{'parent'}) {
5837                         # --root commitdiff
5838                         $formats_nav .= ' (initial)';
5839                 } elsif (scalar @{$co{'parents'}} == 1) {
5840                         # single parent commit
5841                         $formats_nav .=
5842                                 ' (parent: ' .
5843                                 $cgi->a({-href => href(action=>"commitdiff",
5844                                                        hash=>$co{'parent'})},
5845                                         esc_html(substr($co{'parent'}, 0, 7))) .
5846                                 ')';
5847                 } else {
5848                         # merge commit
5849                         if ($hash_parent eq '--cc') {
5850                                 $formats_nav .= ' | ' .
5851                                         $cgi->a({-href => href(action=>"commitdiff",
5852                                                                hash=>$hash, hash_parent=>'-c')},
5853                                                 'combined');
5854                         } else { # $hash_parent eq '-c'
5855                                 $formats_nav .= ' | ' .
5856                                         $cgi->a({-href => href(action=>"commitdiff",
5857                                                                hash=>$hash, hash_parent=>'--cc')},
5858                                                 'compact');
5859                         }
5860                         $formats_nav .=
5861                                 ' (merge: ' .
5862                                 join(' ', map {
5863                                         $cgi->a({-href => href(action=>"commitdiff",
5864                                                                hash=>$_)},
5865                                                 esc_html(substr($_, 0, 7)));
5866                                 } @{$co{'parents'}} ) .
5867                                 ')';
5868                 }
5869         }
5870
5871         my $hash_parent_param = $hash_parent;
5872         if (!defined $hash_parent_param) {
5873                 # --cc for multiple parents, --root for parentless
5874                 $hash_parent_param =
5875                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5876         }
5877
5878         # read commitdiff
5879         my $fd;
5880         my @difftree;
5881         if ($format eq 'html') {
5882                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5883                         "--no-commit-id", "--patch-with-raw", "--full-index",
5884                         $hash_parent_param, $hash, "--"
5885                         or die_error(500, "Open git-diff-tree failed");
5886
5887                 while (my $line = <$fd>) {
5888                         chomp $line;
5889                         # empty line ends raw part of diff-tree output
5890                         last unless $line;
5891                         push @difftree, scalar parse_difftree_raw_line($line);
5892                 }
5893
5894         } elsif ($format eq 'plain') {
5895                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5896                         '-p', $hash_parent_param, $hash, "--"
5897                         or die_error(500, "Open git-diff-tree failed");
5898         } elsif ($format eq 'patch') {
5899                 # For commit ranges, we limit the output to the number of
5900                 # patches specified in the 'patches' feature.
5901                 # For single commits, we limit the output to a single patch,
5902                 # diverging from the git-format-patch default.
5903                 my @commit_spec = ();
5904                 if ($hash_parent) {
5905                         if ($patch_max > 0) {
5906                                 push @commit_spec, "-$patch_max";
5907                         }
5908                         push @commit_spec, '-n', "$hash_parent..$hash";
5909                 } else {
5910                         if ($params{-single}) {
5911                                 push @commit_spec, '-1';
5912                         } else {
5913                                 if ($patch_max > 0) {
5914                                         push @commit_spec, "-$patch_max";
5915                                 }
5916                                 push @commit_spec, "-n";
5917                         }
5918                         push @commit_spec, '--root', $hash;
5919                 }
5920                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5921                         '--stdout', @commit_spec
5922                         or die_error(500, "Open git-format-patch failed");
5923         } else {
5924                 die_error(400, "Unknown commitdiff format");
5925         }
5926
5927         # non-textual hash id's can be cached
5928         my $expires;
5929         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5930                 $expires = "+1d";
5931         }
5932
5933         # write commit message
5934         if ($format eq 'html') {
5935                 my $refs = git_get_references();
5936                 my $ref = format_ref_marker($refs, $co{'id'});
5937
5938                 git_header_html(undef, $expires);
5939                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5940                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5941                 print "<div class=\"title_text\">\n" .
5942                       "<table class=\"object_header\">\n";
5943                 git_print_authorship_rows(\%co);
5944                 print "</table>".
5945                       "</div>\n";
5946                 print "<div class=\"page_body\">\n";
5947                 if (@{$co{'comment'}} > 1) {
5948                         print "<div class=\"log\">\n";
5949                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5950                         print "</div>\n"; # class="log"
5951                 }
5952
5953         } elsif ($format eq 'plain') {
5954                 my $refs = git_get_references("tags");
5955                 my $tagname = git_get_rev_name_tags($hash);
5956                 my $filename = basename($project) . "-$hash.patch";
5957
5958                 print $cgi->header(
5959                         -type => 'text/plain',
5960                         -charset => 'utf-8',
5961                         -expires => $expires,
5962                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5963                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5964                 print "From: " . to_utf8($co{'author'}) . "\n";
5965                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5966                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5967
5968                 print "X-Git-Tag: $tagname\n" if $tagname;
5969                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5970
5971                 foreach my $line (@{$co{'comment'}}) {
5972                         print to_utf8($line) . "\n";
5973                 }
5974                 print "---\n\n";
5975         } elsif ($format eq 'patch') {
5976                 my $filename = basename($project) . "-$hash.patch";
5977
5978                 print $cgi->header(
5979                         -type => 'text/plain',
5980                         -charset => 'utf-8',
5981                         -expires => $expires,
5982                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5983         }
5984
5985         # write patch
5986         if ($format eq 'html') {
5987                 my $use_parents = !defined $hash_parent ||
5988                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5989                 git_difftree_body(\@difftree, $hash,
5990                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5991                 print "<br/>\n";
5992
5993                 git_patchset_body($fd, \@difftree, $hash,
5994                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5995                 close $fd;
5996                 print "</div>\n"; # class="page_body"
5997                 git_footer_html();
5998
5999         } elsif ($format eq 'plain') {
6000                 local $/ = undef;
6001                 print <$fd>;
6002                 close $fd
6003                         or print "Reading git-diff-tree failed\n";
6004         } elsif ($format eq 'patch') {
6005                 local $/ = undef;
6006                 print <$fd>;
6007                 close $fd
6008                         or print "Reading git-format-patch failed\n";
6009         }
6010 }
6011
6012 sub git_commitdiff_plain {
6013         git_commitdiff(-format => 'plain');
6014 }
6015
6016 # format-patch-style patches
6017 sub git_patch {
6018         git_commitdiff(-format => 'patch', -single => 1);
6019 }
6020
6021 sub git_patches {
6022         git_commitdiff(-format => 'patch');
6023 }
6024
6025 sub git_history {
6026         if (!defined $hash_base) {
6027                 $hash_base = git_get_head_hash($project);
6028         }
6029         if (!defined $page) {
6030                 $page = 0;
6031         }
6032         my $ftype;
6033         my %co = parse_commit($hash_base)
6034             or die_error(404, "Unknown commit object");
6035
6036         my $refs = git_get_references();
6037         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
6038
6039         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
6040                                        $file_name, "--full-history")
6041             or die_error(404, "No such file or directory on given branch");
6042
6043         if (!defined $hash && defined $file_name) {
6044                 # some commits could have deleted file in question,
6045                 # and not have it in tree, but one of them has to have it
6046                 for (my $i = 0; $i <= @commitlist; $i++) {
6047                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
6048                         last if defined $hash;
6049                 }
6050         }
6051         if (defined $hash) {
6052                 $ftype = git_get_type($hash);
6053         }
6054         if (!defined $ftype) {
6055                 die_error(500, "Unknown type of object");
6056         }
6057
6058         my $paging_nav = '';
6059         if ($page > 0) {
6060                 $paging_nav .=
6061                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
6062                                                file_name=>$file_name)},
6063                                 "first");
6064                 $paging_nav .= " &sdot; " .
6065                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
6066                                  -accesskey => "p", -title => "Alt-p"}, "prev");
6067         } else {
6068                 $paging_nav .= "first";
6069                 $paging_nav .= " &sdot; prev";
6070         }
6071         my $next_link = '';
6072         if ($#commitlist >= 100) {
6073                 $next_link =
6074                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6075                                  -accesskey => "n", -title => "Alt-n"}, "next");
6076                 $paging_nav .= " &sdot; $next_link";
6077         } else {
6078                 $paging_nav .= " &sdot; next";
6079         }
6080
6081         git_header_html();
6082         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
6083         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
6084         git_print_page_path($file_name, $ftype, $hash_base);
6085
6086         git_history_body(\@commitlist, 0, 99,
6087                          $refs, $hash_base, $ftype, $next_link);
6088
6089         git_footer_html();
6090 }
6091
6092 sub git_search {
6093         gitweb_check_feature('search') or die_error(403, "Search is disabled");
6094         if (!defined $searchtext) {
6095                 die_error(400, "Text field is empty");
6096         }
6097         if (!defined $hash) {
6098                 $hash = git_get_head_hash($project);
6099         }
6100         my %co = parse_commit($hash);
6101         if (!%co) {
6102                 die_error(404, "Unknown commit object");
6103         }
6104         if (!defined $page) {
6105                 $page = 0;
6106         }
6107
6108         $searchtype ||= 'commit';
6109         if ($searchtype eq 'pickaxe') {
6110                 # pickaxe may take all resources of your box and run for several minutes
6111                 # with every query - so decide by yourself how public you make this feature
6112                 gitweb_check_feature('pickaxe')
6113                     or die_error(403, "Pickaxe is disabled");
6114         }
6115         if ($searchtype eq 'grep') {
6116                 gitweb_check_feature('grep')
6117                     or die_error(403, "Grep is disabled");
6118         }
6119
6120         git_header_html();
6121
6122         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
6123                 my $greptype;
6124                 if ($searchtype eq 'commit') {
6125                         $greptype = "--grep=";
6126                 } elsif ($searchtype eq 'author') {
6127                         $greptype = "--author=";
6128                 } elsif ($searchtype eq 'committer') {
6129                         $greptype = "--committer=";
6130                 }
6131                 $greptype .= $searchtext;
6132                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
6133                                                $greptype, '--regexp-ignore-case',
6134                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
6135
6136                 my $paging_nav = '';
6137                 if ($page > 0) {
6138                         $paging_nav .=
6139                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
6140                                                        searchtext=>$searchtext,
6141                                                        searchtype=>$searchtype)},
6142                                         "first");
6143                         $paging_nav .= " &sdot; " .
6144                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6145                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6146                 } else {
6147                         $paging_nav .= "first";
6148                         $paging_nav .= " &sdot; prev";
6149                 }
6150                 my $next_link = '';
6151                 if ($#commitlist >= 100) {
6152                         $next_link =
6153                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6154                                          -accesskey => "n", -title => "Alt-n"}, "next");
6155                         $paging_nav .= " &sdot; $next_link";
6156                 } else {
6157                         $paging_nav .= " &sdot; next";
6158                 }
6159
6160                 if ($#commitlist >= 100) {
6161                 }
6162
6163                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6164                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6165                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6166         }
6167
6168         if ($searchtype eq 'pickaxe') {
6169                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6170                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6171
6172                 print "<table class=\"pickaxe search\">\n";
6173                 my $alternate = 1;
6174                 local $/ = "\n";
6175                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6176                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6177                         ($search_use_regexp ? '--pickaxe-regex' : ());
6178                 undef %co;
6179                 my @files;
6180                 while (my $line = <$fd>) {
6181                         chomp $line;
6182                         next unless $line;
6183
6184                         my %set = parse_difftree_raw_line($line);
6185                         if (defined $set{'commit'}) {
6186                                 # finish previous commit
6187                                 if (%co) {
6188                                         print "</td>\n" .
6189                                               "<td class=\"link\">" .
6190                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6191                                               " | " .
6192                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6193                                         print "</td>\n" .
6194                                               "</tr>\n";
6195                                 }
6196
6197                                 if ($alternate) {
6198                                         print "<tr class=\"dark\">\n";
6199                                 } else {
6200                                         print "<tr class=\"light\">\n";
6201                                 }
6202                                 $alternate ^= 1;
6203                                 %co = parse_commit($set{'commit'});
6204                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6205                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6206                                       "<td><i>$author</i></td>\n" .
6207                                       "<td>" .
6208                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6209                                               -class => "list subject"},
6210                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6211                         } elsif (defined $set{'to_id'}) {
6212                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6213
6214                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6215                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6216                                               -class => "list"},
6217                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6218                                       "<br/>\n";
6219                         }
6220                 }
6221                 close $fd;
6222
6223                 # finish last commit (warning: repetition!)
6224                 if (%co) {
6225                         print "</td>\n" .
6226                               "<td class=\"link\">" .
6227                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6228                               " | " .
6229                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6230                         print "</td>\n" .
6231                               "</tr>\n";
6232                 }
6233
6234                 print "</table>\n";
6235         }
6236
6237         if ($searchtype eq 'grep') {
6238                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6239                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6240
6241                 print "<table class=\"grep_search\">\n";
6242                 my $alternate = 1;
6243                 my $matches = 0;
6244                 local $/ = "\n";
6245                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6246                         $search_use_regexp ? ('-E', '-i') : '-F',
6247                         $searchtext, $co{'tree'};
6248                 my $lastfile = '';
6249                 while (my $line = <$fd>) {
6250                         chomp $line;
6251                         my ($file, $lno, $ltext, $binary);
6252                         last if ($matches++ > 1000);
6253                         if ($line =~ /^Binary file (.+) matches$/) {
6254                                 $file = $1;
6255                                 $binary = 1;
6256                         } else {
6257                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6258                         }
6259                         if ($file ne $lastfile) {
6260                                 $lastfile and print "</td></tr>\n";
6261                                 if ($alternate++) {
6262                                         print "<tr class=\"dark\">\n";
6263                                 } else {
6264                                         print "<tr class=\"light\">\n";
6265                                 }
6266                                 print "<td class=\"list\">".
6267                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6268                                                                file_name=>"$file"),
6269                                                 -class => "list"}, esc_path($file));
6270                                 print "</td><td>\n";
6271                                 $lastfile = $file;
6272                         }
6273                         if ($binary) {
6274                                 print "<div class=\"binary\">Binary file</div>\n";
6275                         } else {
6276                                 $ltext = untabify($ltext);
6277                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6278                                         $ltext = esc_html($1, -nbsp=>1);
6279                                         $ltext .= '<span class="match">';
6280                                         $ltext .= esc_html($2, -nbsp=>1);
6281                                         $ltext .= '</span>';
6282                                         $ltext .= esc_html($3, -nbsp=>1);
6283                                 } else {
6284                                         $ltext = esc_html($ltext, -nbsp=>1);
6285                                 }
6286                                 print "<div class=\"pre\">" .
6287                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6288                                                                file_name=>"$file").'#l'.$lno,
6289                                                 -class => "linenr"}, sprintf('%4i', $lno))
6290                                         . ' ' .  $ltext . "</div>\n";
6291                         }
6292                 }
6293                 if ($lastfile) {
6294                         print "</td></tr>\n";
6295                         if ($matches > 1000) {
6296                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6297                         }
6298                 } else {
6299                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6300                 }
6301                 close $fd;
6302
6303                 print "</table>\n";
6304         }
6305         git_footer_html();
6306 }
6307
6308 sub git_search_help {
6309         git_header_html();
6310         git_print_page_nav('','', $hash,$hash,$hash);
6311         print <<EOT;
6312 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6313 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6314 the pattern entered is recognized as the POSIX extended
6315 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6316 insensitive).</p>
6317 <dl>
6318 <dt><b>commit</b></dt>
6319 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6320 EOT
6321         my $have_grep = gitweb_check_feature('grep');
6322         if ($have_grep) {
6323                 print <<EOT;
6324 <dt><b>grep</b></dt>
6325 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6326     a different one) are searched for the given pattern. On large trees, this search can take
6327 a while and put some strain on the server, so please use it with some consideration. Note that
6328 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6329 case-sensitive.</dd>
6330 EOT
6331         }
6332         print <<EOT;
6333 <dt><b>author</b></dt>
6334 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6335 <dt><b>committer</b></dt>
6336 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6337 EOT
6338         my $have_pickaxe = gitweb_check_feature('pickaxe');
6339         if ($have_pickaxe) {
6340                 print <<EOT;
6341 <dt><b>pickaxe</b></dt>
6342 <dd>All commits that caused the string to appear or disappear from any file (changes that
6343 added, removed or "modified" the string) will be listed. This search can take a while and
6344 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6345 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6346 EOT
6347         }
6348         print "</dl>\n";
6349         git_footer_html();
6350 }
6351
6352 sub git_shortlog {
6353         my $head = git_get_head_hash($project);
6354         if (!defined $hash) {
6355                 $hash = $head;
6356         }
6357         if (!defined $page) {
6358                 $page = 0;
6359         }
6360         my $refs = git_get_references();
6361
6362         my $commit_hash = $hash;
6363         if (defined $hash_parent) {
6364                 $commit_hash = "$hash_parent..$hash";
6365         }
6366         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
6367
6368         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
6369         my $next_link = '';
6370         if ($#commitlist >= 100) {
6371                 $next_link =
6372                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6373                                  -accesskey => "n", -title => "Alt-n"}, "next");
6374         }
6375         my $patch_max = gitweb_check_feature('patches');
6376         if ($patch_max) {
6377                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6378                         $paging_nav .= " &sdot; " .
6379                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6380                                         "patches");
6381                 }
6382         }
6383
6384         git_header_html();
6385         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
6386         git_print_header_div('summary', $project);
6387
6388         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
6389
6390         git_footer_html();
6391 }
6392
6393 ## ......................................................................
6394 ## feeds (RSS, Atom; OPML)
6395
6396 sub git_feed {
6397         my $format = shift || 'atom';
6398         my $have_blame = gitweb_check_feature('blame');
6399
6400         # Atom: http://www.atomenabled.org/developers/syndication/
6401         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6402         if ($format ne 'rss' && $format ne 'atom') {
6403                 die_error(400, "Unknown web feed format");
6404         }
6405
6406         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6407         my $head = $hash || 'HEAD';
6408         my @commitlist = parse_commits($head, 150, 0, $file_name);
6409
6410         my %latest_commit;
6411         my %latest_date;
6412         my $content_type = "application/$format+xml";
6413         if (defined $cgi->http('HTTP_ACCEPT') &&
6414                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6415                 # browser (feed reader) prefers text/xml
6416                 $content_type = 'text/xml';
6417         }
6418         if (defined($commitlist[0])) {
6419                 %latest_commit = %{$commitlist[0]};
6420                 my $latest_epoch = $latest_commit{'committer_epoch'};
6421                 %latest_date   = parse_date($latest_epoch);
6422                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6423                 if (defined $if_modified) {
6424                         my $since;
6425                         if (eval { require HTTP::Date; 1; }) {
6426                                 $since = HTTP::Date::str2time($if_modified);
6427                         } elsif (eval { require Time::ParseDate; 1; }) {
6428                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6429                         }
6430                         if (defined $since && $latest_epoch <= $since) {
6431                                 print $cgi->header(
6432                                         -type => $content_type,
6433                                         -charset => 'utf-8',
6434                                         -last_modified => $latest_date{'rfc2822'},
6435                                         -status => '304 Not Modified');
6436                                 return;
6437                         }
6438                 }
6439                 print $cgi->header(
6440                         -type => $content_type,
6441                         -charset => 'utf-8',
6442                         -last_modified => $latest_date{'rfc2822'});
6443         } else {
6444                 print $cgi->header(
6445                         -type => $content_type,
6446                         -charset => 'utf-8');
6447         }
6448
6449         # Optimization: skip generating the body if client asks only
6450         # for Last-Modified date.
6451         return if ($cgi->request_method() eq 'HEAD');
6452
6453         # header variables
6454         my $title = "$site_name - $project/$action";
6455         my $feed_type = 'log';
6456         if (defined $hash) {
6457                 $title .= " - '$hash'";
6458                 $feed_type = 'branch log';
6459                 if (defined $file_name) {
6460                         $title .= " :: $file_name";
6461                         $feed_type = 'history';
6462                 }
6463         } elsif (defined $file_name) {
6464                 $title .= " - $file_name";
6465                 $feed_type = 'history';
6466         }
6467         $title .= " $feed_type";
6468         my $descr = git_get_project_description($project);
6469         if (defined $descr) {
6470                 $descr = esc_html($descr);
6471         } else {
6472                 $descr = "$project " .
6473                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6474                          " feed";
6475         }
6476         my $owner = git_get_project_owner($project);
6477         $owner = esc_html($owner);
6478
6479         #header
6480         my $alt_url;
6481         if (defined $file_name) {
6482                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6483         } elsif (defined $hash) {
6484                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6485         } else {
6486                 $alt_url = href(-full=>1, action=>"summary");
6487         }
6488         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6489         if ($format eq 'rss') {
6490                 print <<XML;
6491 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6492 <channel>
6493 XML
6494                 print "<title>$title</title>\n" .
6495                       "<link>$alt_url</link>\n" .
6496                       "<description>$descr</description>\n" .
6497                       "<language>en</language>\n" .
6498                       # project owner is responsible for 'editorial' content
6499                       "<managingEditor>$owner</managingEditor>\n";
6500                 if (defined $logo || defined $favicon) {
6501                         # prefer the logo to the favicon, since RSS
6502                         # doesn't allow both
6503                         my $img = esc_url($logo || $favicon);
6504                         print "<image>\n" .
6505                               "<url>$img</url>\n" .
6506                               "<title>$title</title>\n" .
6507                               "<link>$alt_url</link>\n" .
6508                               "</image>\n";
6509                 }
6510                 if (%latest_date) {
6511                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6512                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6513                 }
6514                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6515         } elsif ($format eq 'atom') {
6516                 print <<XML;
6517 <feed xmlns="http://www.w3.org/2005/Atom">
6518 XML
6519                 print "<title>$title</title>\n" .
6520                       "<subtitle>$descr</subtitle>\n" .
6521                       '<link rel="alternate" type="text/html" href="' .
6522                       $alt_url . '" />' . "\n" .
6523                       '<link rel="self" type="' . $content_type . '" href="' .
6524                       $cgi->self_url() . '" />' . "\n" .
6525                       "<id>" . href(-full=>1) . "</id>\n" .
6526                       # use project owner for feed author
6527                       "<author><name>$owner</name></author>\n";
6528                 if (defined $favicon) {
6529                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6530                 }
6531                 if (defined $logo_url) {
6532                         # not twice as wide as tall: 72 x 27 pixels
6533                         print "<logo>" . esc_url($logo) . "</logo>\n";
6534                 }
6535                 if (! %latest_date) {
6536                         # dummy date to keep the feed valid until commits trickle in:
6537                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6538                 } else {
6539                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6540                 }
6541                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6542         }
6543
6544         # contents
6545         for (my $i = 0; $i <= $#commitlist; $i++) {
6546                 my %co = %{$commitlist[$i]};
6547                 my $commit = $co{'id'};
6548                 # we read 150, we always show 30 and the ones more recent than 48 hours
6549                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6550                         last;
6551                 }
6552                 my %cd = parse_date($co{'author_epoch'});
6553
6554                 # get list of changed files
6555                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6556                         $co{'parent'} || "--root",
6557                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6558                         or next;
6559                 my @difftree = map { chomp; $_ } <$fd>;
6560                 close $fd
6561                         or next;
6562
6563                 # print element (entry, item)
6564                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6565                 if ($format eq 'rss') {
6566                         print "<item>\n" .
6567                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6568                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6569                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6570                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6571                               "<link>$co_url</link>\n" .
6572                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6573                               "<content:encoded>" .
6574                               "<![CDATA[\n";
6575                 } elsif ($format eq 'atom') {
6576                         print "<entry>\n" .
6577                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6578                               "<updated>$cd{'iso-8601'}</updated>\n" .
6579                               "<author>\n" .
6580                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6581                         if ($co{'author_email'}) {
6582                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6583                         }
6584                         print "</author>\n" .
6585                               # use committer for contributor
6586                               "<contributor>\n" .
6587                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6588                         if ($co{'committer_email'}) {
6589                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6590                         }
6591                         print "</contributor>\n" .
6592                               "<published>$cd{'iso-8601'}</published>\n" .
6593                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6594                               "<id>$co_url</id>\n" .
6595                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6596                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6597                 }
6598                 my $comment = $co{'comment'};
6599                 print "<pre>\n";
6600                 foreach my $line (@$comment) {
6601                         $line = esc_html($line);
6602                         print "$line\n";
6603                 }
6604                 print "</pre><ul>\n";
6605                 foreach my $difftree_line (@difftree) {
6606                         my %difftree = parse_difftree_raw_line($difftree_line);
6607                         next if !$difftree{'from_id'};
6608
6609                         my $file = $difftree{'file'} || $difftree{'to_file'};
6610
6611                         print "<li>" .
6612                               "[" .
6613                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6614                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6615                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6616                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6617                                       -title => "diff"}, 'D');
6618                         if ($have_blame) {
6619                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6620                                                              file_name=>$file, hash_base=>$commit), -class => "blamelink",
6621                                               -title => "blame"}, 'B');
6622                         }
6623                         # if this is not a feed of a file history
6624                         if (!defined $file_name || $file_name ne $file) {
6625                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6626                                                              file_name=>$file, hash=>$commit),
6627                                               -title => "history"}, 'H');
6628                         }
6629                         $file = esc_path($file);
6630                         print "] ".
6631                               "$file</li>\n";
6632                 }
6633                 if ($format eq 'rss') {
6634                         print "</ul>]]>\n" .
6635                               "</content:encoded>\n" .
6636                               "</item>\n";
6637                 } elsif ($format eq 'atom') {
6638                         print "</ul>\n</div>\n" .
6639                               "</content>\n" .
6640                               "</entry>\n";
6641                 }
6642         }
6643
6644         # end of feed
6645         if ($format eq 'rss') {
6646                 print "</channel>\n</rss>\n";
6647         } elsif ($format eq 'atom') {
6648                 print "</feed>\n";
6649         }
6650 }
6651
6652 sub git_rss {
6653         git_feed('rss');
6654 }
6655
6656 sub git_atom {
6657         git_feed('atom');
6658 }
6659
6660 sub git_opml {
6661         my @list = git_get_projects_list();
6662
6663         print $cgi->header(
6664                 -type => 'text/xml',
6665                 -charset => 'utf-8',
6666                 -content_disposition => 'inline; filename="opml.xml"');
6667
6668         print <<XML;
6669 <?xml version="1.0" encoding="utf-8"?>
6670 <opml version="1.0">
6671 <head>
6672   <title>$site_name OPML Export</title>
6673 </head>
6674 <body>
6675 <outline text="git RSS feeds">
6676 XML
6677
6678         foreach my $pr (@list) {
6679                 my %proj = %$pr;
6680                 my $head = git_get_head_hash($proj{'path'});
6681                 if (!defined $head) {
6682                         next;
6683                 }
6684                 $git_dir = "$projectroot/$proj{'path'}";
6685                 my %co = parse_commit($head);
6686                 if (!%co) {
6687                         next;
6688                 }
6689
6690                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6691                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6692                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6693                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6694         }
6695         print <<XML;
6696 </outline>
6697 </body>
6698 </opml>
6699 XML
6700 }