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