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