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