gitweb/gitweb.perl

   1 #!/usr/bin/perl
   2
   3 # gitweb - simple web interface to track changes in git repositories
   4 #
   5 # (C) 2005-2006, Kay Sievers <kay.sievers@vrfy.org>
   6 # (C) 2005, Christian Gierke
   7 #
   8 # This program is licensed under the GPLv2
   9
  10 use strict;
  11 use warnings;
  12 use CGI qw(:standard :escapeHTML -nosticky);
  13 use CGI::Util qw(unescape);
  14 use CGI::Carp qw(fatalsToBrowser);
  15 use Encode;
  16 use Fcntl ':mode';
  17 use File::Find qw();
  18 use File::Basename qw(basename);
  19 binmode STDOUT, ':utf8';
  20
  21 BEGIN {
  22         CGI->compile() if $ENV{'MOD_PERL'};
  23 }
  24
  25 our $cgi = new CGI;
  26 our $version = "++GIT_VERSION++";
  27 our $my_url = $cgi->url();
  28 our $my_uri = $cgi->url(-absolute => 1);
  29
  30 # Base URL for relative URLs in gitweb ($logo, $favicon, ...),
  31 # needed and used only for URLs with nonempty PATH_INFO
  32 our $base_url = $my_url;
  33
  34 # When the script is used as DirectoryIndex, the URL does not contain the name
  35 # of the script file itself, and $cgi->url() fails to strip PATH_INFO, so we
  36 # have to do it ourselves. We make $path_info global because it's also used
  37 # later on.
  38 #
  39 # Another issue with the script being the DirectoryIndex is that the resulting
  40 # $my_url data is not the full script URL: this is good, because we want
  41 # generated links to keep implying the script name if it wasn't explicitly
  42 # indicated in the URL we're handling, but it means that $my_url cannot be used
  43 # as base URL.
  44 # Therefore, if we needed to strip PATH_INFO, then we know that we have
  45 # to build the base URL ourselves:
  46 our $path_info = $ENV{"PATH_INFO"};
  47 if ($path_info) {
  48         if ($my_url =~ s,\Q$path_info\E$,, &&
  49             $my_uri =~ s,\Q$path_info\E$,, &&
  50             defined $ENV{'SCRIPT_NAME'}) {
  51                 $base_url = $cgi->url(-base => 1) . $ENV{'SCRIPT_NAME'};
  52         }
  53 }
  54
  55 # core git executable to use
  56 # this can just be "git" if your webserver has a sensible PATH
  57 our $GIT = "++GIT_BINDIR++/git";
  58
  59 # absolute fs-path which will be prepended to the project path
  60 #our $projectroot = "/pub/scm";
  61 our $projectroot = "++GITWEB_PROJECTROOT++";
  62
  63 # fs traversing limit for getting project list
  64 # the number is relative to the projectroot
  65 our $project_maxdepth = "++GITWEB_PROJECT_MAXDEPTH++";
  66
  67 # target of the home link on top of all pages
  68 our $home_link = $my_uri || "/";
  69
  70 # string of the home link on top of all pages
  71 our $home_link_str = "++GITWEB_HOME_LINK_STR++";
  72
  73 # name of your site or organization to appear in page titles
  74 # replace this with something more descriptive for clearer bookmarks
  75 our $site_name = "++GITWEB_SITENAME++"
  76                  || ($ENV{'SERVER_NAME'} || "Untitled") . " Git";
  77
  78 # filename of html text to include at top of each page
  79 our $site_header = "++GITWEB_SITE_HEADER++";
  80 # html text to include at home page
  81 our $home_text = "++GITWEB_HOMETEXT++";
  82 # filename of html text to include at bottom of each page
  83 our $site_footer = "++GITWEB_SITE_FOOTER++";
  84
  85 # URI of stylesheets
  86 our @stylesheets = ("++GITWEB_CSS++");
  87 # URI of a single stylesheet, which can be overridden in GITWEB_CONFIG.
  88 our $stylesheet = undef;
  89 # URI of GIT logo (72x27 size)
  90 our $logo = "++GITWEB_LOGO++";
  91 # URI of GIT favicon, assumed to be image/png type
  92 our $favicon = "++GITWEB_FAVICON++";
  93
  94 # URI and label (title) of GIT logo link
  95 #our $logo_url = "http://www.kernel.org/pub/software/scm/git/docs/";
  96 #our $logo_label = "git documentation";
  97 our $logo_url = "http://git-scm.com/";
  98 our $logo_label = "git homepage";
  99
 100 # source of projects list
 101 our $projects_list = "++GITWEB_LIST++";
 102
 103 # the width (in characters) of the projects list "Description" column
 104 our $projects_list_description_width = 25;
 105
 106 # default order of projects list
 107 # valid values are none, project, descr, owner, and age
 108 our $default_projects_order = "project";
 109
 110 # show repository only if this file exists
 111 # (only effective if this variable evaluates to true)
 112 our $export_ok = "++GITWEB_EXPORT_OK++";
 113
 114 # show repository only if this subroutine returns true
 115 # when given the path to the project, for example:
 116 #    sub { return -e "$_[0]/git-daemon-export-ok"; }
 117 our $export_auth_hook = undef;
 118
 119 # only allow viewing of repositories also shown on the overview page
 120 our $strict_export = "++GITWEB_STRICT_EXPORT++";
 121
 122 # list of git base URLs used for URL to where fetch project from,
 123 # i.e. full URL is "$git_base_url/$project"
 124 our @git_base_url_list = grep { $_ ne '' } ("++GITWEB_BASE_URL++");
 125
 126 # default blob_plain mimetype and default charset for text/plain blob
 127 our $default_blob_plain_mimetype = 'text/plain';
 128 our $default_text_plain_charset  = undef;
 129
 130 # file to use for guessing MIME types before trying /etc/mime.types
 131 # (relative to the current git repository)
 132 our $mimetypes_file = undef;
 133
 134 # assume this charset if line contains non-UTF-8 characters;
 135 # it should be valid encoding (see Encoding::Supported(3pm) for list),
 136 # for which encoding all byte sequences are valid, for example
 137 # 'iso-8859-1' aka 'latin1' (it is decoded without checking, so it
 138 # could be even 'utf-8' for the old behavior)
 139 our $fallback_encoding = 'latin1';
 140
 141 # rename detection options for git-diff and git-diff-tree
 142 # - default is '-M', with the cost proportional to
 143 #   (number of removed files) * (number of new files).
 144 # - more costly is '-C' (which implies '-M'), with the cost proportional to
 145 #   (number of changed files + number of removed files) * (number of new files)
 146 # - even more costly is '-C', '--find-copies-harder' with cost
 147 #   (number of files in the original tree) * (number of new files)
 148 # - one might want to include '-B' option, e.g. '-B', '-M'
 149 our @diff_opts = ('-M'); # taken from git_commit
 150
 151 # Disables features that would allow repository owners to inject script into
 152 # the gitweb domain.
 153 our $prevent_xss = 0;
 154
 155 # information about snapshot formats that gitweb is capable of serving
 156 our %known_snapshot_formats = (
 157         # name => {
 158         #       'display' => display name,
 159         #       'type' => mime type,
 160         #       'suffix' => filename suffix,
 161         #       'format' => --format for git-archive,
 162         #       'compressor' => [compressor command and arguments]
 163         #                       (array reference, optional)}
 164         #
 165         'tgz' => {
 166                 'display' => 'tar.gz',
 167                 'type' => 'application/x-gzip',
 168                 'suffix' => '.tar.gz',
 169                 'format' => 'tar',
 170                 'compressor' => ['gzip']},
 171
 172         'tbz2' => {
 173                 'display' => 'tar.bz2',
 174                 'type' => 'application/x-bzip2',
 175                 'suffix' => '.tar.bz2',
 176                 'format' => 'tar',
 177                 'compressor' => ['bzip2']},
 178
 179         'zip' => {
 180                 'display' => 'zip',
 181                 'type' => 'application/x-zip',
 182                 'suffix' => '.zip',
 183                 'format' => 'zip'},
 184 );
 185
 186 # Aliases so we understand old gitweb.snapshot values in repository
 187 # configuration.
 188 our %known_snapshot_format_aliases = (
 189         'gzip'  => 'tgz',
 190         'bzip2' => 'tbz2',
 191
 192         # backward compatibility: legacy gitweb config support
 193         'x-gzip' => undef, 'gz' => undef,
 194         'x-bzip2' => undef, 'bz2' => undef,
 195         'x-zip' => undef, '' => undef,
 196 );
 197
 198 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 199 # are changed, it may be appropriate to change these values too via
 200 # $GITWEB_CONFIG.
 201 our %avatar_size = (
 202         'default' => 16,
 203         'double'  => 32
 204 );
 205
 206 # You define site-wide feature defaults here; override them with
 207 # $GITWEB_CONFIG as necessary.
 208 our %feature = (
 209         # feature => {
 210         #       'sub' => feature-sub (subroutine),
 211         #       'override' => allow-override (boolean),
 212         #       'default' => [ default options...] (array reference)}
 213         #
 214         # if feature is overridable (it means that allow-override has true value),
 215         # then feature-sub will be called with default options as parameters;
 216         # return value of feature-sub indicates if to enable specified feature
 217         #
 218         # if there is no 'sub' key (no feature-sub), then feature cannot be
 219         # overriden
 220         #
 221         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 222         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 223         # is enabled
 224
 225         # Enable the 'blame' blob view, showing the last commit that modified
 226         # each line in the file. This can be very CPU-intensive.
 227
 228         # To enable system wide have in $GITWEB_CONFIG
 229         # $feature{'blame'}{'default'} = [1];
 230         # To have project specific config enable override in $GITWEB_CONFIG
 231         # $feature{'blame'}{'override'} = 1;
 232         # and in project config gitweb.blame = 0|1;
 233         'blame' => {
 234                 'sub' => sub { feature_bool('blame', @_) },
 235                 'override' => 0,
 236                 'default' => [0]},
 237
 238         # Enable the 'snapshot' link, providing a compressed archive of any
 239         # tree. This can potentially generate high traffic if you have large
 240         # project.
 241
 242         # Value is a list of formats defined in %known_snapshot_formats that
 243         # you wish to offer.
 244         # To disable system wide have in $GITWEB_CONFIG
 245         # $feature{'snapshot'}{'default'} = [];
 246         # To have project specific config enable override in $GITWEB_CONFIG
 247         # $feature{'snapshot'}{'override'} = 1;
 248         # and in project config, a comma-separated list of formats or "none"
 249         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 250         'snapshot' => {
 251                 'sub' => \&feature_snapshot,
 252                 'override' => 0,
 253                 'default' => ['tgz']},
 254
 255         # Enable text search, which will list the commits which match author,
 256         # committer or commit text to a given string.  Enabled by default.
 257         # Project specific override is not supported.
 258         'search' => {
 259                 'override' => 0,
 260                 'default' => [1]},
 261
 262         # Enable grep search, which will list the files in currently selected
 263         # tree containing the given string. Enabled by default. This can be
 264         # potentially CPU-intensive, of course.
 265
 266         # To enable system wide have in $GITWEB_CONFIG
 267         # $feature{'grep'}{'default'} = [1];
 268         # To have project specific config enable override in $GITWEB_CONFIG
 269         # $feature{'grep'}{'override'} = 1;
 270         # and in project config gitweb.grep = 0|1;
 271         'grep' => {
 272                 'sub' => sub { feature_bool('grep', @_) },
 273                 'override' => 0,
 274                 'default' => [1]},
 275
 276         # Enable the pickaxe search, which will list the commits that modified
 277         # a given string in a file. This can be practical and quite faster
 278         # alternative to 'blame', but still potentially CPU-intensive.
 279
 280         # To enable system wide have in $GITWEB_CONFIG
 281         # $feature{'pickaxe'}{'default'} = [1];
 282         # To have project specific config enable override in $GITWEB_CONFIG
 283         # $feature{'pickaxe'}{'override'} = 1;
 284         # and in project config gitweb.pickaxe = 0|1;
 285         'pickaxe' => {
 286                 'sub' => sub { feature_bool('pickaxe', @_) },
 287                 'override' => 0,
 288                 'default' => [1]},
 289
 290         # Make gitweb use an alternative format of the URLs which can be
 291         # more readable and natural-looking: project name is embedded
 292         # directly in the path and the query string contains other
 293         # auxiliary information. All gitweb installations recognize
 294         # URL in either format; this configures in which formats gitweb
 295         # generates links.
 296
 297         # To enable system wide have in $GITWEB_CONFIG
 298         # $feature{'pathinfo'}{'default'} = [1];
 299         # Project specific override is not supported.
 300
 301         # Note that you will need to change the default location of CSS,
 302         # favicon, logo and possibly other files to an absolute URL. Also,
 303         # if gitweb.cgi serves as your indexfile, you will need to force
 304         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 305         'pathinfo' => {
 306                 'override' => 0,
 307                 'default' => [0]},
 308
 309         # Make gitweb consider projects in project root subdirectories
 310         # to be forks of existing projects. Given project $projname.git,
 311         # projects matching $projname/*.git will not be shown in the main
 312         # projects list, instead a '+' mark will be added to $projname
 313         # there and a 'forks' view will be enabled for the project, listing
 314         # all the forks. If project list is taken from a file, forks have
 315         # to be listed after the main project.
 316
 317         # To enable system wide have in $GITWEB_CONFIG
 318         # $feature{'forks'}{'default'} = [1];
 319         # Project specific override is not supported.
 320         'forks' => {
 321                 'override' => 0,
 322                 'default' => [0]},
 323
 324         # Insert custom links to the action bar of all project pages.
 325         # This enables you mainly to link to third-party scripts integrating
 326         # into gitweb; e.g. git-browser for graphical history representation
 327         # or custom web-based repository administration interface.
 328
 329         # The 'default' value consists of a list of triplets in the form
 330         # (label, link, position) where position is the label after which
 331         # to insert the link and link is a format string where %n expands
 332         # to the project name, %f to the project path within the filesystem,
 333         # %h to the current hash (h gitweb parameter) and %b to the current
 334         # hash base (hb gitweb parameter); %% expands to %.
 335
 336         # To enable system wide have in $GITWEB_CONFIG e.g.
 337         # $feature{'actions'}{'default'} = [('graphiclog',
 338         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 339         # Project specific override is not supported.
 340         'actions' => {
 341                 'override' => 0,
 342                 'default' => []},
 343
 344         # Allow gitweb scan project content tags described in ctags/
 345         # of project repository, and display the popular Web 2.0-ish
 346         # "tag cloud" near the project list. Note that this is something
 347         # COMPLETELY different from the normal Git tags.
 348
 349         # gitweb by itself can show existing tags, but it does not handle
 350         # tagging itself; you need an external application for that.
 351         # For an example script, check Girocco's cgi/tagproj.cgi.
 352         # You may want to install the HTML::TagCloud Perl module to get
 353         # a pretty tag cloud instead of just a list of tags.
 354
 355         # To enable system wide have in $GITWEB_CONFIG
 356         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 357         # Project specific override is not supported.
 358         'ctags' => {
 359                 'override' => 0,
 360                 'default' => [0]},
 361
 362         # The maximum number of patches in a patchset generated in patch
 363         # view. Set this to 0 or undef to disable patch view, or to a
 364         # negative number to remove any limit.
 365
 366         # To disable system wide have in $GITWEB_CONFIG
 367         # $feature{'patches'}{'default'} = [0];
 368         # To have project specific config enable override in $GITWEB_CONFIG
 369         # $feature{'patches'}{'override'} = 1;
 370         # and in project config gitweb.patches = 0|n;
 371         # where n is the maximum number of patches allowed in a patchset.
 372         'patches' => {
 373                 'sub' => \&feature_patches,
 374                 'override' => 0,
 375                 'default' => [16]},
 376
 377         # Avatar support. When this feature is enabled, views such as
 378         # shortlog or commit will display an avatar associated with
 379         # the email of the committer(s) and/or author(s).
 380
 381         # Currently available providers are gravatar and picon.
 382         # If an unknown provider is specified, the feature is disabled.
 383
 384         # Gravatar depends on Digest::MD5.
 385         # Picon currently relies on the indiana.edu database.
 386
 387         # To enable system wide have in $GITWEB_CONFIG
 388         # $feature{'avatar'}{'default'} = ['<provider>'];
 389         # where <provider> is either gravatar or picon.
 390         # To have project specific config enable override in $GITWEB_CONFIG
 391         # $feature{'avatar'}{'override'} = 1;
 392         # and in project config gitweb.avatar = <provider>;
 393         'avatar' => {
 394                 'sub' => \&feature_avatar,
 395                 'override' => 0,
 396                 'default' => ['']},
 397 );
 398
 399 sub gitweb_get_feature {
 400         my ($name) = @_;
 401         return unless exists $feature{$name};
 402         my ($sub, $override, @defaults) = (
 403                 $feature{$name}{'sub'},
 404                 $feature{$name}{'override'},
 405                 @{$feature{$name}{'default'}});
 406         if (!$override) { return @defaults; }
 407         if (!defined $sub) {
 408                 warn "feature $name is not overrideable";
 409                 return @defaults;
 410         }
 411         return $sub->(@defaults);
 412 }
 413
 414 # A wrapper to check if a given feature is enabled.
 415 # With this, you can say
 416 #
 417 #   my $bool_feat = gitweb_check_feature('bool_feat');
 418 #   gitweb_check_feature('bool_feat') or somecode;
 419 #
 420 # instead of
 421 #
 422 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 423 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 424 #
 425 sub gitweb_check_feature {
 426         return (gitweb_get_feature(@_))[0];
 427 }
 428
 429
 430 sub feature_bool {
 431         my $key = shift;
 432         my ($val) = git_get_project_config($key, '--bool');
 433
 434         if (!defined $val) {
 435                 return ($_[0]);
 436         } elsif ($val eq 'true') {
 437                 return (1);
 438         } elsif ($val eq 'false') {
 439                 return (0);
 440         }
 441 }
 442
 443 sub feature_snapshot {
 444         my (@fmts) = @_;
 445
 446         my ($val) = git_get_project_config('snapshot');
 447
 448         if ($val) {
 449                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 450         }
 451
 452         return @fmts;
 453 }
 454
 455 sub feature_patches {
 456         my @val = (git_get_project_config('patches', '--int'));
 457
 458         if (@val) {
 459                 return @val;
 460         }
 461
 462         return ($_[0]);
 463 }
 464
 465 sub feature_avatar {
 466         my @val = (git_get_project_config('avatar'));
 467
 468         return @val ? @val : @_;
 469 }
 470
 471 # checking HEAD file with -e is fragile if the repository was
 472 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 473 # and then pruned.
 474 sub check_head_link {
 475         my ($dir) = @_;
 476         my $headfile = "$dir/HEAD";
 477         return ((-e $headfile) ||
 478                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 479 }
 480
 481 sub check_export_ok {
 482         my ($dir) = @_;
 483         return (check_head_link($dir) &&
 484                 (!$export_ok || -e "$dir/$export_ok") &&
 485                 (!$export_auth_hook || $export_auth_hook->($dir)));
 486 }
 487
 488 # process alternate names for backward compatibility
 489 # filter out unsupported (unknown) snapshot formats
 490 sub filter_snapshot_fmts {
 491         my @fmts = @_;
 492
 493         @fmts = map {
 494                 exists $known_snapshot_format_aliases{$_} ?
 495                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 496         @fmts = grep {
 497                 exists $known_snapshot_formats{$_} } @fmts;
 498 }
 499
 500 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 501 if (-e $GITWEB_CONFIG) {
 502         do $GITWEB_CONFIG;
 503 } else {
 504         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 505         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 506 }
 507
 508 # version of the core git binary
 509 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 510
 511 $projects_list ||= $projectroot;
 512
 513 # ======================================================================
 514 # input validation and dispatch
 515
 516 # input parameters can be collected from a variety of sources (presently, CGI
 517 # and PATH_INFO), so we define an %input_params hash that collects them all
 518 # together during validation: this allows subsequent uses (e.g. href()) to be
 519 # agnostic of the parameter origin
 520
 521 our %input_params = ();
 522
 523 # input parameters are stored with the long parameter name as key. This will
 524 # also be used in the href subroutine to convert parameters to their CGI
 525 # equivalent, and since the href() usage is the most frequent one, we store
 526 # the name -> CGI key mapping here, instead of the reverse.
 527 #
 528 # XXX: Warning: If you touch this, check the search form for updating,
 529 # too.
 530
 531 our @cgi_param_mapping = (
 532         project => "p",
 533         action => "a",
 534         file_name => "f",
 535         file_parent => "fp",
 536         hash => "h",
 537         hash_parent => "hp",
 538         hash_base => "hb",
 539         hash_parent_base => "hpb",
 540         page => "pg",
 541         order => "o",
 542         searchtext => "s",
 543         searchtype => "st",
 544         snapshot_format => "sf",
 545         extra_options => "opt",
 546         search_use_regexp => "sr",
 547 );
 548 our %cgi_param_mapping = @cgi_param_mapping;
 549
 550 # we will also need to know the possible actions, for validation
 551 our %actions = (
 552         "blame" => \&git_blame,
 553         "blobdiff" => \&git_blobdiff,
 554         "blobdiff_plain" => \&git_blobdiff_plain,
 555         "blob" => \&git_blob,
 556         "blob_plain" => \&git_blob_plain,
 557         "commitdiff" => \&git_commitdiff,
 558         "commitdiff_plain" => \&git_commitdiff_plain,
 559         "commit" => \&git_commit,
 560         "forks" => \&git_forks,
 561         "heads" => \&git_heads,
 562         "history" => \&git_history,
 563         "log" => \&git_log,
 564         "patch" => \&git_patch,
 565         "patches" => \&git_patches,
 566         "rss" => \&git_rss,
 567         "atom" => \&git_atom,
 568         "search" => \&git_search,
 569         "search_help" => \&git_search_help,
 570         "shortlog" => \&git_shortlog,
 571         "summary" => \&git_summary,
 572         "tag" => \&git_tag,
 573         "tags" => \&git_tags,
 574         "tree" => \&git_tree,
 575         "snapshot" => \&git_snapshot,
 576         "object" => \&git_object,
 577         # those below don't need $project
 578         "opml" => \&git_opml,
 579         "project_list" => \&git_project_list,
 580         "project_index" => \&git_project_index,
 581 );
 582
 583 # finally, we have the hash of allowed extra_options for the commands that
 584 # allow them
 585 our %allowed_options = (
 586         "--no-merges" => [ qw(rss atom log shortlog history) ],
 587 );
 588
 589 # fill %input_params with the CGI parameters. All values except for 'opt'
 590 # should be single values, but opt can be an array. We should probably
 591 # build an array of parameters that can be multi-valued, but since for the time
 592 # being it's only this one, we just single it out
 593 while (my ($name, $symbol) = each %cgi_param_mapping) {
 594         if ($symbol eq 'opt') {
 595                 $input_params{$name} = [ $cgi->param($symbol) ];
 596         } else {
 597                 $input_params{$name} = $cgi->param($symbol);
 598         }
 599 }
 600
 601 # now read PATH_INFO and update the parameter list for missing parameters
 602 sub evaluate_path_info {
 603         return if defined $input_params{'project'};
 604         return if !$path_info;
 605         $path_info =~ s,^/+,,;
 606         return if !$path_info;
 607
 608         # find which part of PATH_INFO is project
 609         my $project = $path_info;
 610         $project =~ s,/+$,,;
 611         while ($project && !check_head_link("$projectroot/$project")) {
 612                 $project =~ s,/*[^/]*$,,;
 613         }
 614         return unless $project;
 615         $input_params{'project'} = $project;
 616
 617         # do not change any parameters if an action is given using the query string
 618         return if $input_params{'action'};
 619         $path_info =~ s,^\Q$project\E/*,,;
 620
 621         # next, check if we have an action
 622         my $action = $path_info;
 623         $action =~ s,/.*$,,;
 624         if (exists $actions{$action}) {
 625                 $path_info =~ s,^$action/*,,;
 626                 $input_params{'action'} = $action;
 627         }
 628
 629         # list of actions that want hash_base instead of hash, but can have no
 630         # pathname (f) parameter
 631         my @wants_base = (
 632                 'tree',
 633                 'history',
 634         );
 635
 636         # we want to catch
 637         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 638         my ($parentrefname, $parentpathname, $refname, $pathname) =
 639                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 640
 641         # first, analyze the 'current' part
 642         if (defined $pathname) {
 643                 # we got "branch:filename" or "branch:dir/"
 644                 # we could use git_get_type(branch:pathname), but:
 645                 # - it needs $git_dir
 646                 # - it does a git() call
 647                 # - the convention of terminating directories with a slash
 648                 #   makes it superfluous
 649                 # - embedding the action in the PATH_INFO would make it even
 650                 #   more superfluous
 651                 $pathname =~ s,^/+,,;
 652                 if (!$pathname || substr($pathname, -1) eq "/") {
 653                         $input_params{'action'} ||= "tree";
 654                         $pathname =~ s,/$,,;
 655                 } else {
 656                         # the default action depends on whether we had parent info
 657                         # or not
 658                         if ($parentrefname) {
 659                                 $input_params{'action'} ||= "blobdiff_plain";
 660                         } else {
 661                                 $input_params{'action'} ||= "blob_plain";
 662                         }
 663                 }
 664                 $input_params{'hash_base'} ||= $refname;
 665                 $input_params{'file_name'} ||= $pathname;
 666         } elsif (defined $refname) {
 667                 # we got "branch". In this case we have to choose if we have to
 668                 # set hash or hash_base.
 669                 #
 670                 # Most of the actions without a pathname only want hash to be
 671                 # set, except for the ones specified in @wants_base that want
 672                 # hash_base instead. It should also be noted that hand-crafted
 673                 # links having 'history' as an action and no pathname or hash
 674                 # set will fail, but that happens regardless of PATH_INFO.
 675                 $input_params{'action'} ||= "shortlog";
 676                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 677                         $input_params{'hash_base'} ||= $refname;
 678                 } else {
 679                         $input_params{'hash'} ||= $refname;
 680                 }
 681         }
 682
 683         # next, handle the 'parent' part, if present
 684         if (defined $parentrefname) {
 685                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 686                 # someproject/blobdiff/oldrev..newrev:/filename
 687                 if ($parentpathname) {
 688                         $parentpathname =~ s,^/+,,;
 689                         $parentpathname =~ s,/$,,;
 690                         $input_params{'file_parent'} ||= $parentpathname;
 691                 } else {
 692                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 693                 }
 694                 # we assume that hash_parent_base is wanted if a path was specified,
 695                 # or if the action wants hash_base instead of hash
 696                 if (defined $input_params{'file_parent'} ||
 697                         grep { $_ eq $input_params{'action'} } @wants_base) {
 698                         $input_params{'hash_parent_base'} ||= $parentrefname;
 699                 } else {
 700                         $input_params{'hash_parent'} ||= $parentrefname;
 701                 }
 702         }
 703
 704         # for the snapshot action, we allow URLs in the form
 705         # $project/snapshot/$hash.ext
 706         # where .ext determines the snapshot and gets removed from the
 707         # passed $refname to provide the $hash.
 708         #
 709         # To be able to tell that $refname includes the format extension, we
 710         # require the following two conditions to be satisfied:
 711         # - the hash input parameter MUST have been set from the $refname part
 712         #   of the URL (i.e. they must be equal)
 713         # - the snapshot format MUST NOT have been defined already (e.g. from
 714         #   CGI parameter sf)
 715         # It's also useless to try any matching unless $refname has a dot,
 716         # so we check for that too
 717         if (defined $input_params{'action'} &&
 718                 $input_params{'action'} eq 'snapshot' &&
 719                 defined $refname && index($refname, '.') != -1 &&
 720                 $refname eq $input_params{'hash'} &&
 721                 !defined $input_params{'snapshot_format'}) {
 722                 # We loop over the known snapshot formats, checking for
 723                 # extensions. Allowed extensions are both the defined suffix
 724                 # (which includes the initial dot already) and the snapshot
 725                 # format key itself, with a prepended dot
 726                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 727                         my $hash = $refname;
 728                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 729                                 next;
 730                         }
 731                         my $sfx = $1;
 732                         # a valid suffix was found, so set the snapshot format
 733                         # and reset the hash parameter
 734                         $input_params{'snapshot_format'} = $fmt;
 735                         $input_params{'hash'} = $hash;
 736                         # we also set the format suffix to the one requested
 737                         # in the URL: this way a request for e.g. .tgz returns
 738                         # a .tgz instead of a .tar.gz
 739                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 740                         last;
 741                 }
 742         }
 743 }
 744 evaluate_path_info();
 745
 746 our $action = $input_params{'action'};
 747 if (defined $action) {
 748         if (!validate_action($action)) {
 749                 die_error(400, "Invalid action parameter");
 750         }
 751 }
 752
 753 # parameters which are pathnames
 754 our $project = $input_params{'project'};
 755 if (defined $project) {
 756         if (!validate_project($project)) {
 757                 undef $project;
 758                 die_error(404, "No such project");
 759         }
 760 }
 761
 762 our $file_name = $input_params{'file_name'};
 763 if (defined $file_name) {
 764         if (!validate_pathname($file_name)) {
 765                 die_error(400, "Invalid file parameter");
 766         }
 767 }
 768
 769 our $file_parent = $input_params{'file_parent'};
 770 if (defined $file_parent) {
 771         if (!validate_pathname($file_parent)) {
 772                 die_error(400, "Invalid file parent parameter");
 773         }
 774 }
 775
 776 # parameters which are refnames
 777 our $hash = $input_params{'hash'};
 778 if (defined $hash) {
 779         if (!validate_refname($hash)) {
 780                 die_error(400, "Invalid hash parameter");
 781         }
 782 }
 783
 784 our $hash_parent = $input_params{'hash_parent'};
 785 if (defined $hash_parent) {
 786         if (!validate_refname($hash_parent)) {
 787                 die_error(400, "Invalid hash parent parameter");
 788         }
 789 }
 790
 791 our $hash_base = $input_params{'hash_base'};
 792 if (defined $hash_base) {
 793         if (!validate_refname($hash_base)) {
 794                 die_error(400, "Invalid hash base parameter");
 795         }
 796 }
 797
 798 our @extra_options = @{$input_params{'extra_options'}};
 799 # @extra_options is always defined, since it can only be (currently) set from
 800 # CGI, and $cgi->param() returns the empty array in array context if the param
 801 # is not set
 802 foreach my $opt (@extra_options) {
 803         if (not exists $allowed_options{$opt}) {
 804                 die_error(400, "Invalid option parameter");
 805         }
 806         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 807                 die_error(400, "Invalid option parameter for this action");
 808         }
 809 }
 810
 811 our $hash_parent_base = $input_params{'hash_parent_base'};
 812 if (defined $hash_parent_base) {
 813         if (!validate_refname($hash_parent_base)) {
 814                 die_error(400, "Invalid hash parent base parameter");
 815         }
 816 }
 817
 818 # other parameters
 819 our $page = $input_params{'page'};
 820 if (defined $page) {
 821         if ($page =~ m/[^0-9]/) {
 822                 die_error(400, "Invalid page parameter");
 823         }
 824 }
 825
 826 our $searchtype = $input_params{'searchtype'};
 827 if (defined $searchtype) {
 828         if ($searchtype =~ m/[^a-z]/) {
 829                 die_error(400, "Invalid searchtype parameter");
 830         }
 831 }
 832
 833 our $search_use_regexp = $input_params{'search_use_regexp'};
 834
 835 our $searchtext = $input_params{'searchtext'};
 836 our $search_regexp;
 837 if (defined $searchtext) {
 838         if (length($searchtext) < 2) {
 839                 die_error(403, "At least two characters are required for search parameter");
 840         }
 841         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 842 }
 843
 844 # path to the current git repository
 845 our $git_dir;
 846 $git_dir = "$projectroot/$project" if $project;
 847
 848 # list of supported snapshot formats
 849 our @snapshot_fmts = gitweb_get_feature('snapshot');
 850 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 851
 852 # check that the avatar feature is set to a known provider name,
 853 # and for each provider check if the dependencies are satisfied.
 854 # if the provider name is invalid or the dependencies are not met,
 855 # reset $git_avatar to the empty string.
 856 our ($git_avatar) = gitweb_get_feature('avatar');
 857 if ($git_avatar eq 'gravatar') {
 858         $git_avatar = '' unless (eval { require Digest::MD5; 1; });
 859 } elsif ($git_avatar eq 'picon') {
 860         # no dependencies
 861 } else {
 862         $git_avatar = '';
 863 }
 864
 865 # dispatch
 866 if (!defined $action) {
 867         if (defined $hash) {
 868                 $action = git_get_type($hash);
 869         } elsif (defined $hash_base && defined $file_name) {
 870                 $action = git_get_type("$hash_base:$file_name");
 871         } elsif (defined $project) {
 872                 $action = 'summary';
 873         } else {
 874                 $action = 'project_list';
 875         }
 876 }
 877 if (!defined($actions{$action})) {
 878         die_error(400, "Unknown action");
 879 }
 880 if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
 881     !$project) {
 882         die_error(400, "Project needed");
 883 }
 884 $actions{$action}->();
 885 exit;
 886
 887 ## ======================================================================
 888 ## action links
 889
 890 sub href {
 891         my %params = @_;
 892         # default is to use -absolute url() i.e. $my_uri
 893         my $href = $params{-full} ? $my_url : $my_uri;
 894
 895         $params{'project'} = $project unless exists $params{'project'};
 896
 897         if ($params{-replay}) {
 898                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 899                         if (!exists $params{$name}) {
 900                                 $params{$name} = $input_params{$name};
 901                         }
 902                 }
 903         }
 904
 905         my $use_pathinfo = gitweb_check_feature('pathinfo');
 906         if ($use_pathinfo and defined $params{'project'}) {
 907                 # try to put as many parameters as possible in PATH_INFO:
 908                 #   - project name
 909                 #   - action
 910                 #   - hash_parent or hash_parent_base:/file_parent
 911                 #   - hash or hash_base:/filename
 912                 #   - the snapshot_format as an appropriate suffix
 913
 914                 # When the script is the root DirectoryIndex for the domain,
 915                 # $href here would be something like http://gitweb.example.com/
 916                 # Thus, we strip any trailing / from $href, to spare us double
 917                 # slashes in the final URL
 918                 $href =~ s,/$,,;
 919
 920                 # Then add the project name, if present
 921                 $href .= "/".esc_url($params{'project'});
 922                 delete $params{'project'};
 923
 924                 # since we destructively absorb parameters, we keep this
 925                 # boolean that remembers if we're handling a snapshot
 926                 my $is_snapshot = $params{'action'} eq 'snapshot';
 927
 928                 # Summary just uses the project path URL, any other action is
 929                 # added to the URL
 930                 if (defined $params{'action'}) {
 931                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
 932                         delete $params{'action'};
 933                 }
 934
 935                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
 936                 # stripping nonexistent or useless pieces
 937                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
 938                         || $params{'hash_parent'} || $params{'hash'});
 939                 if (defined $params{'hash_base'}) {
 940                         if (defined $params{'hash_parent_base'}) {
 941                                 $href .= esc_url($params{'hash_parent_base'});
 942                                 # skip the file_parent if it's the same as the file_name
 943                                 delete $params{'file_parent'} if $params{'file_parent'} eq $params{'file_name'};
 944                                 if (defined $params{'file_parent'} && $params{'file_parent'} !~ /\.\./) {
 945                                         $href .= ":/".esc_url($params{'file_parent'});
 946                                         delete $params{'file_parent'};
 947                                 }
 948                                 $href .= "..";
 949                                 delete $params{'hash_parent'};
 950                                 delete $params{'hash_parent_base'};
 951                         } elsif (defined $params{'hash_parent'}) {
 952                                 $href .= esc_url($params{'hash_parent'}). "..";
 953                                 delete $params{'hash_parent'};
 954                         }
 955
 956                         $href .= esc_url($params{'hash_base'});
 957                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
 958                                 $href .= ":/".esc_url($params{'file_name'});
 959                                 delete $params{'file_name'};
 960                         }
 961                         delete $params{'hash'};
 962                         delete $params{'hash_base'};
 963                 } elsif (defined $params{'hash'}) {
 964                         $href .= esc_url($params{'hash'});
 965                         delete $params{'hash'};
 966                 }
 967
 968                 # If the action was a snapshot, we can absorb the
 969                 # snapshot_format parameter too
 970                 if ($is_snapshot) {
 971                         my $fmt = $params{'snapshot_format'};
 972                         # snapshot_format should always be defined when href()
 973                         # is called, but just in case some code forgets, we
 974                         # fall back to the default
 975                         $fmt ||= $snapshot_fmts[0];
 976                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
 977                         delete $params{'snapshot_format'};
 978                 }
 979         }
 980
 981         # now encode the parameters explicitly
 982         my @result = ();
 983         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
 984                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
 985                 if (defined $params{$name}) {
 986                         if (ref($params{$name}) eq "ARRAY") {
 987                                 foreach my $par (@{$params{$name}}) {
 988                                         push @result, $symbol . "=" . esc_param($par);
 989                                 }
 990                         } else {
 991                                 push @result, $symbol . "=" . esc_param($params{$name});
 992                         }
 993                 }
 994         }
 995         $href .= "?" . join(';', @result) if scalar @result;
 996
 997         return $href;
 998 }
 999
1000
1001 ## ======================================================================
1002 ## validation, quoting/unquoting and escaping
1003
1004 sub validate_action {
1005         my $input = shift || return undef;
1006         return undef unless exists $actions{$input};
1007         return $input;
1008 }
1009
1010 sub validate_project {
1011         my $input = shift || return undef;
1012         if (!validate_pathname($input) ||
1013                 !(-d "$projectroot/$input") ||
1014                 !check_export_ok("$projectroot/$input") ||
1015                 ($strict_export && !project_in_list($input))) {
1016                 return undef;
1017         } else {
1018                 return $input;
1019         }
1020 }
1021
1022 sub validate_pathname {
1023         my $input = shift || return undef;
1024
1025         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1026         # at the beginning, at the end, and between slashes.
1027         # also this catches doubled slashes
1028         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1029                 return undef;
1030         }
1031         # no null characters
1032         if ($input =~ m!\0!) {
1033                 return undef;
1034         }
1035         return $input;
1036 }
1037
1038 sub validate_refname {
1039         my $input = shift || return undef;
1040
1041         # textual hashes are O.K.
1042         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1043                 return $input;
1044         }
1045         # it must be correct pathname
1046         $input = validate_pathname($input)
1047                 or return undef;
1048         # restrictions on ref name according to git-check-ref-format
1049         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1050                 return undef;
1051         }
1052         return $input;
1053 }
1054
1055 # decode sequences of octets in utf8 into Perl's internal form,
1056 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1057 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1058 sub to_utf8 {
1059         my $str = shift;
1060         if (utf8::valid($str)) {
1061                 utf8::decode($str);
1062                 return $str;
1063         } else {
1064                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1065         }
1066 }
1067
1068 # quote unsafe chars, but keep the slash, even when it's not
1069 # correct, but quoted slashes look too horrible in bookmarks
1070 sub esc_param {
1071         my $str = shift;
1072         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
1073         $str =~ s/\+/%2B/g;
1074         $str =~ s/ /\+/g;
1075         return $str;
1076 }
1077
1078 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1079 sub esc_url {
1080         my $str = shift;
1081         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1082         $str =~ s/\+/%2B/g;
1083         $str =~ s/ /\+/g;
1084         return $str;
1085 }
1086
1087 # replace invalid utf8 character with SUBSTITUTION sequence
1088 sub esc_html {
1089         my $str = shift;
1090         my %opts = @_;
1091
1092         $str = to_utf8($str);
1093         $str = $cgi->escapeHTML($str);
1094         if ($opts{'-nbsp'}) {
1095                 $str =~ s/ /&nbsp;/g;
1096         }
1097         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1098         return $str;
1099 }
1100
1101 # quote control characters and escape filename to HTML
1102 sub esc_path {
1103         my $str = shift;
1104         my %opts = @_;
1105
1106         $str = to_utf8($str);
1107         $str = $cgi->escapeHTML($str);
1108         if ($opts{'-nbsp'}) {
1109                 $str =~ s/ /&nbsp;/g;
1110         }
1111         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1112         return $str;
1113 }
1114
1115 # Make control characters "printable", using character escape codes (CEC)
1116 sub quot_cec {
1117         my $cntrl = shift;
1118         my %opts = @_;
1119         my %es = ( # character escape codes, aka escape sequences
1120                 "\t" => '\t',   # tab            (HT)
1121                 "\n" => '\n',   # line feed      (LF)
1122                 "\r" => '\r',   # carrige return (CR)
1123                 "\f" => '\f',   # form feed      (FF)
1124                 "\b" => '\b',   # backspace      (BS)
1125                 "\a" => '\a',   # alarm (bell)   (BEL)
1126                 "\e" => '\e',   # escape         (ESC)
1127                 "\013" => '\v', # vertical tab   (VT)
1128                 "\000" => '\0', # nul character  (NUL)
1129         );
1130         my $chr = ( (exists $es{$cntrl})
1131                     ? $es{$cntrl}
1132                     : sprintf('\%2x', ord($cntrl)) );
1133         if ($opts{-nohtml}) {
1134                 return $chr;
1135         } else {
1136                 return "<span class=\"cntrl\">$chr</span>";
1137         }
1138 }
1139
1140 # Alternatively use unicode control pictures codepoints,
1141 # Unicode "printable representation" (PR)
1142 sub quot_upr {
1143         my $cntrl = shift;
1144         my %opts = @_;
1145
1146         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1147         if ($opts{-nohtml}) {
1148                 return $chr;
1149         } else {
1150                 return "<span class=\"cntrl\">$chr</span>";
1151         }
1152 }
1153
1154 # git may return quoted and escaped filenames
1155 sub unquote {
1156         my $str = shift;
1157
1158         sub unq {
1159                 my $seq = shift;
1160                 my %es = ( # character escape codes, aka escape sequences
1161                         't' => "\t",   # tab            (HT, TAB)
1162                         'n' => "\n",   # newline        (NL)
1163                         'r' => "\r",   # return         (CR)
1164                         'f' => "\f",   # form feed      (FF)
1165                         'b' => "\b",   # backspace      (BS)
1166                         'a' => "\a",   # alarm (bell)   (BEL)
1167                         'e' => "\e",   # escape         (ESC)
1168                         'v' => "\013", # vertical tab   (VT)
1169                 );
1170
1171                 if ($seq =~ m/^[0-7]{1,3}$/) {
1172                         # octal char sequence
1173                         return chr(oct($seq));
1174                 } elsif (exists $es{$seq}) {
1175                         # C escape sequence, aka character escape code
1176                         return $es{$seq};
1177                 }
1178                 # quoted ordinary character
1179                 return $seq;
1180         }
1181
1182         if ($str =~ m/^"(.*)"$/) {
1183                 # needs unquoting
1184                 $str = $1;
1185                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1186         }
1187         return $str;
1188 }
1189
1190 # escape tabs (convert tabs to spaces)
1191 sub untabify {
1192         my $line = shift;
1193
1194         while ((my $pos = index($line, "\t")) != -1) {
1195                 if (my $count = (8 - ($pos % 8))) {
1196                         my $spaces = ' ' x $count;
1197                         $line =~ s/\t/$spaces/;
1198                 }
1199         }
1200
1201         return $line;
1202 }
1203
1204 sub project_in_list {
1205         my $project = shift;
1206         my @list = git_get_projects_list();
1207         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1208 }
1209
1210 ## ----------------------------------------------------------------------
1211 ## HTML aware string manipulation
1212
1213 # Try to chop given string on a word boundary between position
1214 # $len and $len+$add_len. If there is no word boundary there,
1215 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1216 # (marking chopped part) would be longer than given string.
1217 sub chop_str {
1218         my $str = shift;
1219         my $len = shift;
1220         my $add_len = shift || 10;
1221         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1222
1223         # Make sure perl knows it is utf8 encoded so we don't
1224         # cut in the middle of a utf8 multibyte char.
1225         $str = to_utf8($str);
1226
1227         # allow only $len chars, but don't cut a word if it would fit in $add_len
1228         # if it doesn't fit, cut it if it's still longer than the dots we would add
1229         # remove chopped character entities entirely
1230
1231         # when chopping in the middle, distribute $len into left and right part
1232         # return early if chopping wouldn't make string shorter
1233         if ($where eq 'center') {
1234                 return $str if ($len + 5 >= length($str)); # filler is length 5
1235                 $len = int($len/2);
1236         } else {
1237                 return $str if ($len + 4 >= length($str)); # filler is length 4
1238         }
1239
1240         # regexps: ending and beginning with word part up to $add_len
1241         my $endre = qr/.{$len}\w{0,$add_len}/;
1242         my $begre = qr/\w{0,$add_len}.{$len}/;
1243
1244         if ($where eq 'left') {
1245                 $str =~ m/^(.*?)($begre)$/;
1246                 my ($lead, $body) = ($1, $2);
1247                 if (length($lead) > 4) {
1248                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
1249                         $lead = " ...";
1250                 }
1251                 return "$lead$body";
1252
1253         } elsif ($where eq 'center') {
1254                 $str =~ m/^($endre)(.*)$/;
1255                 my ($left, $str)  = ($1, $2);
1256                 $str =~ m/^(.*?)($begre)$/;
1257                 my ($mid, $right) = ($1, $2);
1258                 if (length($mid) > 5) {
1259                         $left  =~ s/&[^;]*$//;
1260                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
1261                         $mid = " ... ";
1262                 }
1263                 return "$left$mid$right";
1264
1265         } else {
1266                 $str =~ m/^($endre)(.*)$/;
1267                 my $body = $1;
1268                 my $tail = $2;
1269                 if (length($tail) > 4) {
1270                         $body =~ s/&[^;]*$//;
1271                         $tail = "... ";
1272                 }
1273                 return "$body$tail";
1274         }
1275 }
1276
1277 # takes the same arguments as chop_str, but also wraps a <span> around the
1278 # result with a title attribute if it does get chopped. Additionally, the
1279 # string is HTML-escaped.
1280 sub chop_and_escape_str {
1281         my ($str) = @_;
1282
1283         my $chopped = chop_str(@_);
1284         if ($chopped eq $str) {
1285                 return esc_html($chopped);
1286         } else {
1287                 $str =~ s/[[:cntrl:]]/?/g;
1288                 return $cgi->span({-title=>$str}, esc_html($chopped));
1289         }
1290 }
1291
1292 ## ----------------------------------------------------------------------
1293 ## functions returning short strings
1294
1295 # CSS class for given age value (in seconds)
1296 sub age_class {
1297         my $age = shift;
1298
1299         if (!defined $age) {
1300                 return "noage";
1301         } elsif ($age < 60*60*2) {
1302                 return "age0";
1303         } elsif ($age < 60*60*24*2) {
1304                 return "age1";
1305         } else {
1306                 return "age2";
1307         }
1308 }
1309
1310 # convert age in seconds to "nn units ago" string
1311 sub age_string {
1312         my $age = shift;
1313         my $age_str;
1314
1315         if ($age > 60*60*24*365*2) {
1316                 $age_str = (int $age/60/60/24/365);
1317                 $age_str .= " years ago";
1318         } elsif ($age > 60*60*24*(365/12)*2) {
1319                 $age_str = int $age/60/60/24/(365/12);
1320                 $age_str .= " months ago";
1321         } elsif ($age > 60*60*24*7*2) {
1322                 $age_str = int $age/60/60/24/7;
1323                 $age_str .= " weeks ago";
1324         } elsif ($age > 60*60*24*2) {
1325                 $age_str = int $age/60/60/24;
1326                 $age_str .= " days ago";
1327         } elsif ($age > 60*60*2) {
1328                 $age_str = int $age/60/60;
1329                 $age_str .= " hours ago";
1330         } elsif ($age > 60*2) {
1331                 $age_str = int $age/60;
1332                 $age_str .= " min ago";
1333         } elsif ($age > 2) {
1334                 $age_str = int $age;
1335                 $age_str .= " sec ago";
1336         } else {
1337                 $age_str .= " right now";
1338         }
1339         return $age_str;
1340 }
1341
1342 use constant {
1343         S_IFINVALID => 0030000,
1344         S_IFGITLINK => 0160000,
1345 };
1346
1347 # submodule/subproject, a commit object reference
1348 sub S_ISGITLINK {
1349         my $mode = shift;
1350
1351         return (($mode & S_IFMT) == S_IFGITLINK)
1352 }
1353
1354 # convert file mode in octal to symbolic file mode string
1355 sub mode_str {
1356         my $mode = oct shift;
1357
1358         if (S_ISGITLINK($mode)) {
1359                 return 'm---------';
1360         } elsif (S_ISDIR($mode & S_IFMT)) {
1361                 return 'drwxr-xr-x';
1362         } elsif (S_ISLNK($mode)) {
1363                 return 'lrwxrwxrwx';
1364         } elsif (S_ISREG($mode)) {
1365                 # git cares only about the executable bit
1366                 if ($mode & S_IXUSR) {
1367                         return '-rwxr-xr-x';
1368                 } else {
1369                         return '-rw-r--r--';
1370                 };
1371         } else {
1372                 return '----------';
1373         }
1374 }
1375
1376 # convert file mode in octal to file type string
1377 sub file_type {
1378         my $mode = shift;
1379
1380         if ($mode !~ m/^[0-7]+$/) {
1381                 return $mode;
1382         } else {
1383                 $mode = oct $mode;
1384         }
1385
1386         if (S_ISGITLINK($mode)) {
1387                 return "submodule";
1388         } elsif (S_ISDIR($mode & S_IFMT)) {
1389                 return "directory";
1390         } elsif (S_ISLNK($mode)) {
1391                 return "symlink";
1392         } elsif (S_ISREG($mode)) {
1393                 return "file";
1394         } else {
1395                 return "unknown";
1396         }
1397 }
1398
1399 # convert file mode in octal to file type description string
1400 sub file_type_long {
1401         my $mode = shift;
1402
1403         if ($mode !~ m/^[0-7]+$/) {
1404                 return $mode;
1405         } else {
1406                 $mode = oct $mode;
1407         }
1408
1409         if (S_ISGITLINK($mode)) {
1410                 return "submodule";
1411         } elsif (S_ISDIR($mode & S_IFMT)) {
1412                 return "directory";
1413         } elsif (S_ISLNK($mode)) {
1414                 return "symlink";
1415         } elsif (S_ISREG($mode)) {
1416                 if ($mode & S_IXUSR) {
1417                         return "executable";
1418                 } else {
1419                         return "file";
1420                 };
1421         } else {
1422                 return "unknown";
1423         }
1424 }
1425
1426
1427 ## ----------------------------------------------------------------------
1428 ## functions returning short HTML fragments, or transforming HTML fragments
1429 ## which don't belong to other sections
1430
1431 # format line of commit message.
1432 sub format_log_line_html {
1433         my $line = shift;
1434
1435         $line = esc_html($line, -nbsp=>1);
1436         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1437                 $cgi->a({-href => href(action=>"object", hash=>$1),
1438                                         -class => "text"}, $1);
1439         }eg;
1440
1441         return $line;
1442 }
1443
1444 # format marker of refs pointing to given object
1445
1446 # the destination action is chosen based on object type and current context:
1447 # - for annotated tags, we choose the tag view unless it's the current view
1448 #   already, in which case we go to shortlog view
1449 # - for other refs, we keep the current view if we're in history, shortlog or
1450 #   log view, and select shortlog otherwise
1451 sub format_ref_marker {
1452         my ($refs, $id) = @_;
1453         my $markers = '';
1454
1455         if (defined $refs->{$id}) {
1456                 foreach my $ref (@{$refs->{$id}}) {
1457                         # this code exploits the fact that non-lightweight tags are the
1458                         # only indirect objects, and that they are the only objects for which
1459                         # we want to use tag instead of shortlog as action
1460                         my ($type, $name) = qw();
1461                         my $indirect = ($ref =~ s/\^\{\}$//);
1462                         # e.g. tags/v2.6.11 or heads/next
1463                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1464                                 $type = $1;
1465                                 $name = $2;
1466                         } else {
1467                                 $type = "ref";
1468                                 $name = $ref;
1469                         }
1470
1471                         my $class = $type;
1472                         $class .= " indirect" if $indirect;
1473
1474                         my $dest_action = "shortlog";
1475
1476                         if ($indirect) {
1477                                 $dest_action = "tag" unless $action eq "tag";
1478                         } elsif ($action =~ /^(history|(short)?log)$/) {
1479                                 $dest_action = $action;
1480                         }
1481
1482                         my $dest = "";
1483                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1484                         $dest .= $ref;
1485
1486                         my $link = $cgi->a({
1487                                 -href => href(
1488                                         action=>$dest_action,
1489                                         hash=>$dest
1490                                 )}, $name);
1491
1492                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1493                                 $link . "</span>";
1494                 }
1495         }
1496
1497         if ($markers) {
1498                 return ' <span class="refs">'. $markers . '</span>';
1499         } else {
1500                 return "";
1501         }
1502 }
1503
1504 # format, perhaps shortened and with markers, title line
1505 sub format_subject_html {
1506         my ($long, $short, $href, $extra) = @_;
1507         $extra = '' unless defined($extra);
1508
1509         if (length($short) < length($long)) {
1510                 $long =~ s/[[:cntrl:]]/?/g;
1511                 return $cgi->a({-href => $href, -class => "list subject",
1512                                 -title => to_utf8($long)},
1513                        esc_html($short) . $extra);
1514         } else {
1515                 return $cgi->a({-href => $href, -class => "list subject"},
1516                        esc_html($long)  . $extra);
1517         }
1518 }
1519
1520 # Rather than recomputing the url for an email multiple times, we cache it
1521 # after the first hit. This gives a visible benefit in views where the avatar
1522 # for the same email is used repeatedly (e.g. shortlog).
1523 # The cache is shared by all avatar engines (currently gravatar only), which
1524 # are free to use it as preferred. Since only one avatar engine is used for any
1525 # given page, there's no risk for cache conflicts.
1526 our %avatar_cache = ();
1527
1528 # Compute the picon url for a given email, by using the picon search service over at
1529 # http://www.cs.indiana.edu/picons/search.html
1530 sub picon_url {
1531         my $email = lc shift;
1532         if (!$avatar_cache{$email}) {
1533                 my ($user, $domain) = split('@', $email);
1534                 $avatar_cache{$email} =
1535                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1536                         "$domain/$user/" .
1537                         "users+domains+unknown/up/single";
1538         }
1539         return $avatar_cache{$email};
1540 }
1541
1542 # Compute the gravatar url for a given email, if it's not in the cache already.
1543 # Gravatar stores only the part of the URL before the size, since that's the
1544 # one computationally more expensive. This also allows reuse of the cache for
1545 # different sizes (for this particular engine).
1546 sub gravatar_url {
1547         my $email = lc shift;
1548         my $size = shift;
1549         $avatar_cache{$email} ||=
1550                 "http://www.gravatar.com/avatar/" .
1551                         Digest::MD5::md5_hex($email) . "?s=";
1552         return $avatar_cache{$email} . $size;
1553 }
1554
1555 # Insert an avatar for the given $email at the given $size if the feature
1556 # is enabled.
1557 sub git_get_avatar {
1558         my ($email, %opts) = @_;
1559         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1560         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1561         $opts{-size} ||= 'default';
1562         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1563         my $url = "";
1564         if ($git_avatar eq 'gravatar') {
1565                 $url = gravatar_url($email, $size);
1566         } elsif ($git_avatar eq 'picon') {
1567                 $url = picon_url($email);
1568         }
1569         # Other providers can be added by extending the if chain, defining $url
1570         # as needed. If no variant puts something in $url, we assume avatars
1571         # are completely disabled/unavailable.
1572         if ($url) {
1573                 return $pre_white .
1574                        "<img width=\"$size\" " .
1575                             "class=\"avatar\" " .
1576                             "src=\"$url\" " .
1577                             "alt=\"\" " .
1578                        "/>" . $post_white;
1579         } else {
1580                 return "";
1581         }
1582 }
1583
1584 # format the author name of the given commit with the given tag
1585 # the author name is chopped and escaped according to the other
1586 # optional parameters (see chop_str).
1587 sub format_author_html {
1588         my $tag = shift;
1589         my $co = shift;
1590         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1591         return "<$tag class=\"author\">" .
1592                git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1593                $author . "</$tag>";
1594 }
1595
1596 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1597 sub format_git_diff_header_line {
1598         my $line = shift;
1599         my $diffinfo = shift;
1600         my ($from, $to) = @_;
1601
1602         if ($diffinfo->{'nparents'}) {
1603                 # combined diff
1604                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1605                 if ($to->{'href'}) {
1606                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1607                                          esc_path($to->{'file'}));
1608                 } else { # file was deleted (no href)
1609                         $line .= esc_path($to->{'file'});
1610                 }
1611         } else {
1612                 # "ordinary" diff
1613                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1614                 if ($from->{'href'}) {
1615                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1616                                          'a/' . esc_path($from->{'file'}));
1617                 } else { # file was added (no href)
1618                         $line .= 'a/' . esc_path($from->{'file'});
1619                 }
1620                 $line .= ' ';
1621                 if ($to->{'href'}) {
1622                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1623                                          'b/' . esc_path($to->{'file'}));
1624                 } else { # file was deleted
1625                         $line .= 'b/' . esc_path($to->{'file'});
1626                 }
1627         }
1628
1629         return "<div class=\"diff header\">$line</div>\n";
1630 }
1631
1632 # format extended diff header line, before patch itself
1633 sub format_extended_diff_header_line {
1634         my $line = shift;
1635         my $diffinfo = shift;
1636         my ($from, $to) = @_;
1637
1638         # match <path>
1639         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1640                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1641                                        esc_path($from->{'file'}));
1642         }
1643         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1644                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1645                                  esc_path($to->{'file'}));
1646         }
1647         # match single <mode>
1648         if ($line =~ m/\s(\d{6})$/) {
1649                 $line .= '<span class="info"> (' .
1650                          file_type_long($1) .
1651                          ')</span>';
1652         }
1653         # match <hash>
1654         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1655                 # can match only for combined diff
1656                 $line = 'index ';
1657                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1658                         if ($from->{'href'}[$i]) {
1659                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1660                                                   -class=>"hash"},
1661                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1662                         } else {
1663                                 $line .= '0' x 7;
1664                         }
1665                         # separator
1666                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1667                 }
1668                 $line .= '..';
1669                 if ($to->{'href'}) {
1670                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1671                                          substr($diffinfo->{'to_id'},0,7));
1672                 } else {
1673                         $line .= '0' x 7;
1674                 }
1675
1676         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1677                 # can match only for ordinary diff
1678                 my ($from_link, $to_link);
1679                 if ($from->{'href'}) {
1680                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1681                                              substr($diffinfo->{'from_id'},0,7));
1682                 } else {
1683                         $from_link = '0' x 7;
1684                 }
1685                 if ($to->{'href'}) {
1686                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1687                                            substr($diffinfo->{'to_id'},0,7));
1688                 } else {
1689                         $to_link = '0' x 7;
1690                 }
1691                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1692                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1693         }
1694
1695         return $line . "<br/>\n";
1696 }
1697
1698 # format from-file/to-file diff header
1699 sub format_diff_from_to_header {
1700         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1701         my $line;
1702         my $result = '';
1703
1704         $line = $from_line;
1705         #assert($line =~ m/^---/) if DEBUG;
1706         # no extra formatting for "^--- /dev/null"
1707         if (! $diffinfo->{'nparents'}) {
1708                 # ordinary (single parent) diff
1709                 if ($line =~ m!^--- "?a/!) {
1710                         if ($from->{'href'}) {
1711                                 $line = '--- a/' .
1712                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1713                                                 esc_path($from->{'file'}));
1714                         } else {
1715                                 $line = '--- a/' .
1716                                         esc_path($from->{'file'});
1717                         }
1718                 }
1719                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1720
1721         } else {
1722                 # combined diff (merge commit)
1723                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1724                         if ($from->{'href'}[$i]) {
1725                                 $line = '--- ' .
1726                                         $cgi->a({-href=>href(action=>"blobdiff",
1727                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1728                                                              hash_parent_base=>$parents[$i],
1729                                                              file_parent=>$from->{'file'}[$i],
1730                                                              hash=>$diffinfo->{'to_id'},
1731                                                              hash_base=>$hash,
1732                                                              file_name=>$to->{'file'}),
1733                                                  -class=>"path",
1734                                                  -title=>"diff" . ($i+1)},
1735                                                 $i+1) .
1736                                         '/' .
1737                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1738                                                 esc_path($from->{'file'}[$i]));
1739                         } else {
1740                                 $line = '--- /dev/null';
1741                         }
1742                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1743                 }
1744         }
1745
1746         $line = $to_line;
1747         #assert($line =~ m/^\+\+\+/) if DEBUG;
1748         # no extra formatting for "^+++ /dev/null"
1749         if ($line =~ m!^\+\+\+ "?b/!) {
1750                 if ($to->{'href'}) {
1751                         $line = '+++ b/' .
1752                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1753                                         esc_path($to->{'file'}));
1754                 } else {
1755                         $line = '+++ b/' .
1756                                 esc_path($to->{'file'});
1757                 }
1758         }
1759         $result .= qq!<div class="diff to_file">$line</div>\n!;
1760
1761         return $result;
1762 }
1763
1764 # create note for patch simplified by combined diff
1765 sub format_diff_cc_simplified {
1766         my ($diffinfo, @parents) = @_;
1767         my $result = '';
1768
1769         $result .= "<div class=\"diff header\">" .
1770                    "diff --cc ";
1771         if (!is_deleted($diffinfo)) {
1772                 $result .= $cgi->a({-href => href(action=>"blob",
1773                                                   hash_base=>$hash,
1774                                                   hash=>$diffinfo->{'to_id'},
1775                                                   file_name=>$diffinfo->{'to_file'}),
1776                                     -class => "path"},
1777                                    esc_path($diffinfo->{'to_file'}));
1778         } else {
1779                 $result .= esc_path($diffinfo->{'to_file'});
1780         }
1781         $result .= "</div>\n" . # class="diff header"
1782                    "<div class=\"diff nodifferences\">" .
1783                    "Simple merge" .
1784                    "</div>\n"; # class="diff nodifferences"
1785
1786         return $result;
1787 }
1788
1789 # format patch (diff) line (not to be used for diff headers)
1790 sub format_diff_line {
1791         my $line = shift;
1792         my ($from, $to) = @_;
1793         my $diff_class = "";
1794
1795         chomp $line;
1796
1797         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1798                 # combined diff
1799                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1800                 if ($line =~ m/^\@{3}/) {
1801                         $diff_class = " chunk_header";
1802                 } elsif ($line =~ m/^\\/) {
1803                         $diff_class = " incomplete";
1804                 } elsif ($prefix =~ tr/+/+/) {
1805                         $diff_class = " add";
1806                 } elsif ($prefix =~ tr/-/-/) {
1807                         $diff_class = " rem";
1808                 }
1809         } else {
1810                 # assume ordinary diff
1811                 my $char = substr($line, 0, 1);
1812                 if ($char eq '+') {
1813                         $diff_class = " add";
1814                 } elsif ($char eq '-') {
1815                         $diff_class = " rem";
1816                 } elsif ($char eq '@') {
1817                         $diff_class = " chunk_header";
1818                 } elsif ($char eq "\\") {
1819                         $diff_class = " incomplete";
1820                 }
1821         }
1822         $line = untabify($line);
1823         if ($from && $to && $line =~ m/^\@{2} /) {
1824                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1825                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1826
1827                 $from_lines = 0 unless defined $from_lines;
1828                 $to_lines   = 0 unless defined $to_lines;
1829
1830                 if ($from->{'href'}) {
1831                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1832                                              -class=>"list"}, $from_text);
1833                 }
1834                 if ($to->{'href'}) {
1835                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1836                                              -class=>"list"}, $to_text);
1837                 }
1838                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1839                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1840                 return "<div class=\"diff$diff_class\">$line</div>\n";
1841         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1842                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1843                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1844
1845                 @from_text = split(' ', $ranges);
1846                 for (my $i = 0; $i < @from_text; ++$i) {
1847                         ($from_start[$i], $from_nlines[$i]) =
1848                                 (split(',', substr($from_text[$i], 1)), 0);
1849                 }
1850
1851                 $to_text   = pop @from_text;
1852                 $to_start  = pop @from_start;
1853                 $to_nlines = pop @from_nlines;
1854
1855                 $line = "<span class=\"chunk_info\">$prefix ";
1856                 for (my $i = 0; $i < @from_text; ++$i) {
1857                         if ($from->{'href'}[$i]) {
1858                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1859                                                   -class=>"list"}, $from_text[$i]);
1860                         } else {
1861                                 $line .= $from_text[$i];
1862                         }
1863                         $line .= " ";
1864                 }
1865                 if ($to->{'href'}) {
1866                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1867                                           -class=>"list"}, $to_text);
1868                 } else {
1869                         $line .= $to_text;
1870                 }
1871                 $line .= " $prefix</span>" .
1872                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1873                 return "<div class=\"diff$diff_class\">$line</div>\n";
1874         }
1875         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1876 }
1877
1878 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1879 # linked.  Pass the hash of the tree/commit to snapshot.
1880 sub format_snapshot_links {
1881         my ($hash) = @_;
1882         my $num_fmts = @snapshot_fmts;
1883         if ($num_fmts > 1) {
1884                 # A parenthesized list of links bearing format names.
1885                 # e.g. "snapshot (_tar.gz_ _zip_)"
1886                 return "snapshot (" . join(' ', map
1887                         $cgi->a({
1888                                 -href => href(
1889                                         action=>"snapshot",
1890                                         hash=>$hash,
1891                                         snapshot_format=>$_
1892                                 )
1893                         }, $known_snapshot_formats{$_}{'display'})
1894                 , @snapshot_fmts) . ")";
1895         } elsif ($num_fmts == 1) {
1896                 # A single "snapshot" link whose tooltip bears the format name.
1897                 # i.e. "_snapshot_"
1898                 my ($fmt) = @snapshot_fmts;
1899                 return
1900                         $cgi->a({
1901                                 -href => href(
1902                                         action=>"snapshot",
1903                                         hash=>$hash,
1904                                         snapshot_format=>$fmt
1905                                 ),
1906                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1907                         }, "snapshot");
1908         } else { # $num_fmts == 0
1909                 return undef;
1910         }
1911 }
1912
1913 ## ......................................................................
1914 ## functions returning values to be passed, perhaps after some
1915 ## transformation, to other functions; e.g. returning arguments to href()
1916
1917 # returns hash to be passed to href to generate gitweb URL
1918 # in -title key it returns description of link
1919 sub get_feed_info {
1920         my $format = shift || 'Atom';
1921         my %res = (action => lc($format));
1922
1923         # feed links are possible only for project views
1924         return unless (defined $project);
1925         # some views should link to OPML, or to generic project feed,
1926         # or don't have specific feed yet (so they should use generic)
1927         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1928
1929         my $branch;
1930         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1931         # from tag links; this also makes possible to detect branch links
1932         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1933             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1934                 $branch = $1;
1935         }
1936         # find log type for feed description (title)
1937         my $type = 'log';
1938         if (defined $file_name) {
1939                 $type  = "history of $file_name";
1940                 $type .= "/" if ($action eq 'tree');
1941                 $type .= " on '$branch'" if (defined $branch);
1942         } else {
1943                 $type = "log of $branch" if (defined $branch);
1944         }
1945
1946         $res{-title} = $type;
1947         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1948         $res{'file_name'} = $file_name;
1949
1950         return %res;
1951 }
1952
1953 ## ----------------------------------------------------------------------
1954 ## git utility subroutines, invoking git commands
1955
1956 # returns path to the core git executable and the --git-dir parameter as list
1957 sub git_cmd {
1958         return $GIT, '--git-dir='.$git_dir;
1959 }
1960
1961 # quote the given arguments for passing them to the shell
1962 # quote_command("command", "arg 1", "arg with ' and ! characters")
1963 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1964 # Try to avoid using this function wherever possible.
1965 sub quote_command {
1966         return join(' ',
1967                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
1968 }
1969
1970 # get HEAD ref of given project as hash
1971 sub git_get_head_hash {
1972         my $project = shift;
1973         my $o_git_dir = $git_dir;
1974         my $retval = undef;
1975         $git_dir = "$projectroot/$project";
1976         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1977                 my $head = <$fd>;
1978                 close $fd;
1979                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1980                         $retval = $1;
1981                 }
1982         }
1983         if (defined $o_git_dir) {
1984                 $git_dir = $o_git_dir;
1985         }
1986         return $retval;
1987 }
1988
1989 # get type of given object
1990 sub git_get_type {
1991         my $hash = shift;
1992
1993         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
1994         my $type = <$fd>;
1995         close $fd or return;
1996         chomp $type;
1997         return $type;
1998 }
1999
2000 # repository configuration
2001 our $config_file = '';
2002 our %config;
2003
2004 # store multiple values for single key as anonymous array reference
2005 # single values stored directly in the hash, not as [ <value> ]
2006 sub hash_set_multi {
2007         my ($hash, $key, $value) = @_;
2008
2009         if (!exists $hash->{$key}) {
2010                 $hash->{$key} = $value;
2011         } elsif (!ref $hash->{$key}) {
2012                 $hash->{$key} = [ $hash->{$key}, $value ];
2013         } else {
2014                 push @{$hash->{$key}}, $value;
2015         }
2016 }
2017
2018 # return hash of git project configuration
2019 # optionally limited to some section, e.g. 'gitweb'
2020 sub git_parse_project_config {
2021         my $section_regexp = shift;
2022         my %config;
2023
2024         local $/ = "\0";
2025
2026         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2027                 or return;
2028
2029         while (my $keyval = <$fh>) {
2030                 chomp $keyval;
2031                 my ($key, $value) = split(/\n/, $keyval, 2);
2032
2033                 hash_set_multi(\%config, $key, $value)
2034                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2035         }
2036         close $fh;
2037
2038         return %config;
2039 }
2040
2041 # convert config value to boolean: 'true' or 'false'
2042 # no value, number > 0, 'true' and 'yes' values are true
2043 # rest of values are treated as false (never as error)
2044 sub config_to_bool {
2045         my $val = shift;
2046
2047         return 1 if !defined $val;             # section.key
2048
2049         # strip leading and trailing whitespace
2050         $val =~ s/^\s+//;
2051         $val =~ s/\s+$//;
2052
2053         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2054                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2055 }
2056
2057 # convert config value to simple decimal number
2058 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2059 # to be multiplied by 1024, 1048576, or 1073741824
2060 sub config_to_int {
2061         my $val = shift;
2062
2063         # strip leading and trailing whitespace
2064         $val =~ s/^\s+//;
2065         $val =~ s/\s+$//;
2066
2067         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2068                 $unit = lc($unit);
2069                 # unknown unit is treated as 1
2070                 return $num * ($unit eq 'g' ? 1073741824 :
2071                                $unit eq 'm' ?    1048576 :
2072                                $unit eq 'k' ?       1024 : 1);
2073         }
2074         return $val;
2075 }
2076
2077 # convert config value to array reference, if needed
2078 sub config_to_multi {
2079         my $val = shift;
2080
2081         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2082 }
2083
2084 sub git_get_project_config {
2085         my ($key, $type) = @_;
2086
2087         # key sanity check
2088         return unless ($key);
2089         $key =~ s/^gitweb\.//;
2090         return if ($key =~ m/\W/);
2091
2092         # type sanity check
2093         if (defined $type) {
2094                 $type =~ s/^--//;
2095                 $type = undef
2096                         unless ($type eq 'bool' || $type eq 'int');
2097         }
2098
2099         # get config
2100         if (!defined $config_file ||
2101             $config_file ne "$git_dir/config") {
2102                 %config = git_parse_project_config('gitweb');
2103                 $config_file = "$git_dir/config";
2104         }
2105
2106         # check if config variable (key) exists
2107         return unless exists $config{"gitweb.$key"};
2108
2109         # ensure given type
2110         if (!defined $type) {
2111                 return $config{"gitweb.$key"};
2112         } elsif ($type eq 'bool') {
2113                 # backward compatibility: 'git config --bool' returns true/false
2114                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2115         } elsif ($type eq 'int') {
2116                 return config_to_int($config{"gitweb.$key"});
2117         }
2118         return $config{"gitweb.$key"};
2119 }
2120
2121 # get hash of given path at given ref
2122 sub git_get_hash_by_path {
2123         my $base = shift;
2124         my $path = shift || return undef;
2125         my $type = shift;
2126
2127         $path =~ s,/+$,,;
2128
2129         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2130                 or die_error(500, "Open git-ls-tree failed");
2131         my $line = <$fd>;
2132         close $fd or return undef;
2133
2134         if (!defined $line) {
2135                 # there is no tree or hash given by $path at $base
2136                 return undef;
2137         }
2138
2139         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2140         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2141         if (defined $type && $type ne $2) {
2142                 # type doesn't match
2143                 return undef;
2144         }
2145         return $3;
2146 }
2147
2148 # get path of entry with given hash at given tree-ish (ref)
2149 # used to get 'from' filename for combined diff (merge commit) for renames
2150 sub git_get_path_by_hash {
2151         my $base = shift || return;
2152         my $hash = shift || return;
2153
2154         local $/ = "\0";
2155
2156         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2157                 or return undef;
2158         while (my $line = <$fd>) {
2159                 chomp $line;
2160
2161                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2162                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2163                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2164                         close $fd;
2165                         return $1;
2166                 }
2167         }
2168         close $fd;
2169         return undef;
2170 }
2171
2172 ## ......................................................................
2173 ## git utility functions, directly accessing git repository
2174
2175 sub git_get_project_description {
2176         my $path = shift;
2177
2178         $git_dir = "$projectroot/$path";
2179         open my $fd, '<', "$git_dir/description"
2180                 or return git_get_project_config('description');
2181         my $descr = <$fd>;
2182         close $fd;
2183         if (defined $descr) {
2184                 chomp $descr;
2185         }
2186         return $descr;
2187 }
2188
2189 sub git_get_project_ctags {
2190         my $path = shift;
2191         my $ctags = {};
2192
2193         $git_dir = "$projectroot/$path";
2194         opendir my $dh, "$git_dir/ctags"
2195                 or return $ctags;
2196         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2197                 open my $ct, '<', $_ or next;
2198                 my $val = <$ct>;
2199                 chomp $val;
2200                 close $ct;
2201                 my $ctag = $_; $ctag =~ s#.*/##;
2202                 $ctags->{$ctag} = $val;
2203         }
2204         closedir $dh;
2205         $ctags;
2206 }
2207
2208 sub git_populate_project_tagcloud {
2209         my $ctags = shift;
2210
2211         # First, merge different-cased tags; tags vote on casing
2212         my %ctags_lc;
2213         foreach (keys %$ctags) {
2214                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2215                 if (not $ctags_lc{lc $_}->{topcount}
2216                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2217                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2218                         $ctags_lc{lc $_}->{topname} = $_;
2219                 }
2220         }
2221
2222         my $cloud;
2223         if (eval { require HTML::TagCloud; 1; }) {
2224                 $cloud = HTML::TagCloud->new;
2225                 foreach (sort keys %ctags_lc) {
2226                         # Pad the title with spaces so that the cloud looks
2227                         # less crammed.
2228                         my $title = $ctags_lc{$_}->{topname};
2229                         $title =~ s/ /&nbsp;/g;
2230                         $title =~ s/^/&nbsp;/g;
2231                         $title =~ s/$/&nbsp;/g;
2232                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2233                 }
2234         } else {
2235                 $cloud = \%ctags_lc;
2236         }
2237         $cloud;
2238 }
2239
2240 sub git_show_project_tagcloud {
2241         my ($cloud, $count) = @_;
2242         print STDERR ref($cloud)."..\n";
2243         if (ref $cloud eq 'HTML::TagCloud') {
2244                 return $cloud->html_and_css($count);
2245         } else {
2246                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2247                 return '<p align="center">' . join (', ', map {
2248                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2249                 } splice(@tags, 0, $count)) . '</p>';
2250         }
2251 }
2252
2253 sub git_get_project_url_list {
2254         my $path = shift;
2255
2256         $git_dir = "$projectroot/$path";
2257         open my $fd, '<', "$git_dir/cloneurl"
2258                 or return wantarray ?
2259                 @{ config_to_multi(git_get_project_config('url')) } :
2260                    config_to_multi(git_get_project_config('url'));
2261         my @git_project_url_list = map { chomp; $_ } <$fd>;
2262         close $fd;
2263
2264         return wantarray ? @git_project_url_list : \@git_project_url_list;
2265 }
2266
2267 sub git_get_projects_list {
2268         my ($filter) = @_;
2269         my @list;
2270
2271         $filter ||= '';
2272         $filter =~ s/\.git$//;
2273
2274         my $check_forks = gitweb_check_feature('forks');
2275
2276         if (-d $projects_list) {
2277                 # search in directory
2278                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2279                 # remove the trailing "/"
2280                 $dir =~ s!/+$!!;
2281                 my $pfxlen = length("$dir");
2282                 my $pfxdepth = ($dir =~ tr!/!!);
2283
2284                 File::Find::find({
2285                         follow_fast => 1, # follow symbolic links
2286                         follow_skip => 2, # ignore duplicates
2287                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2288                         wanted => sub {
2289                                 # skip project-list toplevel, if we get it.
2290                                 return if (m!^[/.]$!);
2291                                 # only directories can be git repositories
2292                                 return unless (-d $_);
2293                                 # don't traverse too deep (Find is super slow on os x)
2294                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2295                                         $File::Find::prune = 1;
2296                                         return;
2297                                 }
2298
2299                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2300                                 # we check related file in $projectroot
2301                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2302                                 if (check_export_ok("$projectroot/$path")) {
2303                                         push @list, { path => $path };
2304                                         $File::Find::prune = 1;
2305                                 }
2306                         },
2307                 }, "$dir");
2308
2309         } elsif (-f $projects_list) {
2310                 # read from file(url-encoded):
2311                 # 'git%2Fgit.git Linus+Torvalds'
2312                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2313                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2314                 my %paths;
2315                 open my $fd, '<', $projects_list or return;
2316         PROJECT:
2317                 while (my $line = <$fd>) {
2318                         chomp $line;
2319                         my ($path, $owner) = split ' ', $line;
2320                         $path = unescape($path);
2321                         $owner = unescape($owner);
2322                         if (!defined $path) {
2323                                 next;
2324                         }
2325                         if ($filter ne '') {
2326                                 # looking for forks;
2327                                 my $pfx = substr($path, 0, length($filter));
2328                                 if ($pfx ne $filter) {
2329                                         next PROJECT;
2330                                 }
2331                                 my $sfx = substr($path, length($filter));
2332                                 if ($sfx !~ /^\/.*\.git$/) {
2333                                         next PROJECT;
2334                                 }
2335                         } elsif ($check_forks) {
2336                         PATH:
2337                                 foreach my $filter (keys %paths) {
2338                                         # looking for forks;
2339                                         my $pfx = substr($path, 0, length($filter));
2340                                         if ($pfx ne $filter) {
2341                                                 next PATH;
2342                                         }
2343                                         my $sfx = substr($path, length($filter));
2344                                         if ($sfx !~ /^\/.*\.git$/) {
2345                                                 next PATH;
2346                                         }
2347                                         # is a fork, don't include it in
2348                                         # the list
2349                                         next PROJECT;
2350                                 }
2351                         }
2352                         if (check_export_ok("$projectroot/$path")) {
2353                                 my $pr = {
2354                                         path => $path,
2355                                         owner => to_utf8($owner),
2356                                 };
2357                                 push @list, $pr;
2358                                 (my $forks_path = $path) =~ s/\.git$//;
2359                                 $paths{$forks_path}++;
2360                         }
2361                 }
2362                 close $fd;
2363         }
2364         return @list;
2365 }
2366
2367 our $gitweb_project_owner = undef;
2368 sub git_get_project_list_from_file {
2369
2370         return if (defined $gitweb_project_owner);
2371
2372         $gitweb_project_owner = {};
2373         # read from file (url-encoded):
2374         # 'git%2Fgit.git Linus+Torvalds'
2375         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2376         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2377         if (-f $projects_list) {
2378                 open(my $fd, '<', $projects_list);
2379                 while (my $line = <$fd>) {
2380                         chomp $line;
2381                         my ($pr, $ow) = split ' ', $line;
2382                         $pr = unescape($pr);
2383                         $ow = unescape($ow);
2384                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2385                 }
2386                 close $fd;
2387         }
2388 }
2389
2390 sub git_get_project_owner {
2391         my $project = shift;
2392         my $owner;
2393
2394         return undef unless $project;
2395         $git_dir = "$projectroot/$project";
2396
2397         if (!defined $gitweb_project_owner) {
2398                 git_get_project_list_from_file();
2399         }
2400
2401         if (exists $gitweb_project_owner->{$project}) {
2402                 $owner = $gitweb_project_owner->{$project};
2403         }
2404         if (!defined $owner){
2405                 $owner = git_get_project_config('owner');
2406         }
2407         if (!defined $owner) {
2408                 $owner = get_file_owner("$git_dir");
2409         }
2410
2411         return $owner;
2412 }
2413
2414 sub git_get_last_activity {
2415         my ($path) = @_;
2416         my $fd;
2417
2418         $git_dir = "$projectroot/$path";
2419         open($fd, "-|", git_cmd(), 'for-each-ref',
2420              '--format=%(committer)',
2421              '--sort=-committerdate',
2422              '--count=1',
2423              'refs/heads') or return;
2424         my $most_recent = <$fd>;
2425         close $fd or return;
2426         if (defined $most_recent &&
2427             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2428                 my $timestamp = $1;
2429                 my $age = time - $timestamp;
2430                 return ($age, age_string($age));
2431         }
2432         return (undef, undef);
2433 }
2434
2435 sub git_get_references {
2436         my $type = shift || "";
2437         my %refs;
2438         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2439         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2440         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2441                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2442                 or return;
2443
2444         while (my $line = <$fd>) {
2445                 chomp $line;
2446                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2447                         if (defined $refs{$1}) {
2448                                 push @{$refs{$1}}, $2;
2449                         } else {
2450                                 $refs{$1} = [ $2 ];
2451                         }
2452                 }
2453         }
2454         close $fd or return;
2455         return \%refs;
2456 }
2457
2458 sub git_get_rev_name_tags {
2459         my $hash = shift || return undef;
2460
2461         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2462                 or return;
2463         my $name_rev = <$fd>;
2464         close $fd;
2465
2466         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2467                 return $1;
2468         } else {
2469                 # catches also '$hash undefined' output
2470                 return undef;
2471         }
2472 }
2473
2474 ## ----------------------------------------------------------------------
2475 ## parse to hash functions
2476
2477 sub parse_date {
2478         my $epoch = shift;
2479         my $tz = shift || "-0000";
2480
2481         my %date;
2482         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2483         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2484         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2485         $date{'hour'} = $hour;
2486         $date{'minute'} = $min;
2487         $date{'mday'} = $mday;
2488         $date{'day'} = $days[$wday];
2489         $date{'month'} = $months[$mon];
2490         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2491                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2492         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2493                              $mday, $months[$mon], $hour ,$min;
2494         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2495                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2496
2497         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2498         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2499         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2500         $date{'hour_local'} = $hour;
2501         $date{'minute_local'} = $min;
2502         $date{'tz_local'} = $tz;
2503         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2504                                   1900+$year, $mon+1, $mday,
2505                                   $hour, $min, $sec, $tz);
2506         return %date;
2507 }
2508
2509 sub parse_tag {
2510         my $tag_id = shift;
2511         my %tag;
2512         my @comment;
2513
2514         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2515         $tag{'id'} = $tag_id;
2516         while (my $line = <$fd>) {
2517                 chomp $line;
2518                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2519                         $tag{'object'} = $1;
2520                 } elsif ($line =~ m/^type (.+)$/) {
2521                         $tag{'type'} = $1;
2522                 } elsif ($line =~ m/^tag (.+)$/) {
2523                         $tag{'name'} = $1;
2524                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2525                         $tag{'author'} = $1;
2526                         $tag{'author_epoch'} = $2;
2527                         $tag{'author_tz'} = $3;
2528                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2529                                 $tag{'author_name'}  = $1;
2530                                 $tag{'author_email'} = $2;
2531                         } else {
2532                                 $tag{'author_name'} = $tag{'author'};
2533                         }
2534                 } elsif ($line =~ m/--BEGIN/) {
2535                         push @comment, $line;
2536                         last;
2537                 } elsif ($line eq "") {
2538                         last;
2539                 }
2540         }
2541         push @comment, <$fd>;
2542         $tag{'comment'} = \@comment;
2543         close $fd or return;
2544         if (!defined $tag{'name'}) {
2545                 return
2546         };
2547         return %tag
2548 }
2549
2550 sub parse_commit_text {
2551         my ($commit_text, $withparents) = @_;
2552         my @commit_lines = split '\n', $commit_text;
2553         my %co;
2554
2555         pop @commit_lines; # Remove '\0'
2556
2557         if (! @commit_lines) {
2558                 return;
2559         }
2560
2561         my $header = shift @commit_lines;
2562         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2563                 return;
2564         }
2565         ($co{'id'}, my @parents) = split ' ', $header;
2566         while (my $line = shift @commit_lines) {
2567                 last if $line eq "\n";
2568                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2569                         $co{'tree'} = $1;
2570                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2571                         push @parents, $1;
2572                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2573                         $co{'author'} = $1;
2574                         $co{'author_epoch'} = $2;
2575                         $co{'author_tz'} = $3;
2576                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2577                                 $co{'author_name'}  = $1;
2578                                 $co{'author_email'} = $2;
2579                         } else {
2580                                 $co{'author_name'} = $co{'author'};
2581                         }
2582                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2583                         $co{'committer'} = $1;
2584                         $co{'committer_epoch'} = $2;
2585                         $co{'committer_tz'} = $3;
2586                         $co{'committer_name'} = $co{'committer'};
2587                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2588                                 $co{'committer_name'}  = $1;
2589                                 $co{'committer_email'} = $2;
2590                         } else {
2591                                 $co{'committer_name'} = $co{'committer'};
2592                         }
2593                 }
2594         }
2595         if (!defined $co{'tree'}) {
2596                 return;
2597         };
2598         $co{'parents'} = \@parents;
2599         $co{'parent'} = $parents[0];
2600
2601         foreach my $title (@commit_lines) {
2602                 $title =~ s/^    //;
2603                 if ($title ne "") {
2604                         $co{'title'} = chop_str($title, 80, 5);
2605                         # remove leading stuff of merges to make the interesting part visible
2606                         if (length($title) > 50) {
2607                                 $title =~ s/^Automatic //;
2608                                 $title =~ s/^merge (of|with) /Merge ... /i;
2609                                 if (length($title) > 50) {
2610                                         $title =~ s/(http|rsync):\/\///;
2611                                 }
2612                                 if (length($title) > 50) {
2613                                         $title =~ s/(master|www|rsync)\.//;
2614                                 }
2615                                 if (length($title) > 50) {
2616                                         $title =~ s/kernel.org:?//;
2617                                 }
2618                                 if (length($title) > 50) {
2619                                         $title =~ s/\/pub\/scm//;
2620                                 }
2621                         }
2622                         $co{'title_short'} = chop_str($title, 50, 5);
2623                         last;
2624                 }
2625         }
2626         if (! defined $co{'title'} || $co{'title'} eq "") {
2627                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2628         }
2629         # remove added spaces
2630         foreach my $line (@commit_lines) {
2631                 $line =~ s/^    //;
2632         }
2633         $co{'comment'} = \@commit_lines;
2634
2635         my $age = time - $co{'committer_epoch'};
2636         $co{'age'} = $age;
2637         $co{'age_string'} = age_string($age);
2638         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2639         if ($age > 60*60*24*7*2) {
2640                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2641                 $co{'age_string_age'} = $co{'age_string'};
2642         } else {
2643                 $co{'age_string_date'} = $co{'age_string'};
2644                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2645         }
2646         return %co;
2647 }
2648
2649 sub parse_commit {
2650         my ($commit_id) = @_;
2651         my %co;
2652
2653         local $/ = "\0";
2654
2655         open my $fd, "-|", git_cmd(), "rev-list",
2656                 "--parents",
2657                 "--header",
2658                 "--max-count=1",
2659                 $commit_id,
2660                 "--",
2661                 or die_error(500, "Open git-rev-list failed");
2662         %co = parse_commit_text(<$fd>, 1);
2663         close $fd;
2664
2665         return %co;
2666 }
2667
2668 sub parse_commits {
2669         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2670         my @cos;
2671
2672         $maxcount ||= 1;
2673         $skip ||= 0;
2674
2675         local $/ = "\0";
2676
2677         open my $fd, "-|", git_cmd(), "rev-list",
2678                 "--header",
2679                 @args,
2680                 ("--max-count=" . $maxcount),
2681                 ("--skip=" . $skip),
2682                 @extra_options,
2683                 $commit_id,
2684                 "--",
2685                 ($filename ? ($filename) : ())
2686                 or die_error(500, "Open git-rev-list failed");
2687         while (my $line = <$fd>) {
2688                 my %co = parse_commit_text($line);
2689                 push @cos, \%co;
2690         }
2691         close $fd;
2692
2693         return wantarray ? @cos : \@cos;
2694 }
2695
2696 # parse line of git-diff-tree "raw" output
2697 sub parse_difftree_raw_line {
2698         my $line = shift;
2699         my %res;
2700
2701         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2702         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2703         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2704                 $res{'from_mode'} = $1;
2705                 $res{'to_mode'} = $2;
2706                 $res{'from_id'} = $3;
2707                 $res{'to_id'} = $4;
2708                 $res{'status'} = $5;
2709                 $res{'similarity'} = $6;
2710                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2711                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2712                 } else {
2713                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2714                 }
2715         }
2716         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2717         # combined diff (for merge commit)
2718         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2719                 $res{'nparents'}  = length($1);
2720                 $res{'from_mode'} = [ split(' ', $2) ];
2721                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2722                 $res{'from_id'} = [ split(' ', $3) ];
2723                 $res{'to_id'} = pop @{$res{'from_id'}};
2724                 $res{'status'} = [ split('', $4) ];
2725                 $res{'to_file'} = unquote($5);
2726         }
2727         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2728         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2729                 $res{'commit'} = $1;
2730         }
2731
2732         return wantarray ? %res : \%res;
2733 }
2734
2735 # wrapper: return parsed line of git-diff-tree "raw" output
2736 # (the argument might be raw line, or parsed info)
2737 sub parsed_difftree_line {
2738         my $line_or_ref = shift;
2739
2740         if (ref($line_or_ref) eq "HASH") {
2741                 # pre-parsed (or generated by hand)
2742                 return $line_or_ref;
2743         } else {
2744                 return parse_difftree_raw_line($line_or_ref);
2745         }
2746 }
2747
2748 # parse line of git-ls-tree output
2749 sub parse_ls_tree_line {
2750         my $line = shift;
2751         my %opts = @_;
2752         my %res;
2753
2754         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2755         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2756
2757         $res{'mode'} = $1;
2758         $res{'type'} = $2;
2759         $res{'hash'} = $3;
2760         if ($opts{'-z'}) {
2761                 $res{'name'} = $4;
2762         } else {
2763                 $res{'name'} = unquote($4);
2764         }
2765
2766         return wantarray ? %res : \%res;
2767 }
2768
2769 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2770 sub parse_from_to_diffinfo {
2771         my ($diffinfo, $from, $to, @parents) = @_;
2772
2773         if ($diffinfo->{'nparents'}) {
2774                 # combined diff
2775                 $from->{'file'} = [];
2776                 $from->{'href'} = [];
2777                 fill_from_file_info($diffinfo, @parents)
2778                         unless exists $diffinfo->{'from_file'};
2779                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2780                         $from->{'file'}[$i] =
2781                                 defined $diffinfo->{'from_file'}[$i] ?
2782                                         $diffinfo->{'from_file'}[$i] :
2783                                         $diffinfo->{'to_file'};
2784                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2785                                 $from->{'href'}[$i] = href(action=>"blob",
2786                                                            hash_base=>$parents[$i],
2787                                                            hash=>$diffinfo->{'from_id'}[$i],
2788                                                            file_name=>$from->{'file'}[$i]);
2789                         } else {
2790                                 $from->{'href'}[$i] = undef;
2791                         }
2792                 }
2793         } else {
2794                 # ordinary (not combined) diff
2795                 $from->{'file'} = $diffinfo->{'from_file'};
2796                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2797                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2798                                                hash=>$diffinfo->{'from_id'},
2799                                                file_name=>$from->{'file'});
2800                 } else {
2801                         delete $from->{'href'};
2802                 }
2803         }
2804
2805         $to->{'file'} = $diffinfo->{'to_file'};
2806         if (!is_deleted($diffinfo)) { # file exists in result
2807                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2808                                      hash=>$diffinfo->{'to_id'},
2809                                      file_name=>$to->{'file'});
2810         } else {
2811                 delete $to->{'href'};
2812         }
2813 }
2814
2815 ## ......................................................................
2816 ## parse to array of hashes functions
2817
2818 sub git_get_heads_list {
2819         my $limit = shift;
2820         my @headslist;
2821
2822         open my $fd, '-|', git_cmd(), 'for-each-ref',
2823                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2824                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2825                 'refs/heads'
2826                 or return;
2827         while (my $line = <$fd>) {
2828                 my %ref_item;
2829
2830                 chomp $line;
2831                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2832                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2833                 my ($committer, $epoch, $tz) =
2834                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2835                 $ref_item{'fullname'}  = $name;
2836                 $name =~ s!^refs/heads/!!;
2837
2838                 $ref_item{'name'}  = $name;
2839                 $ref_item{'id'}    = $hash;
2840                 $ref_item{'title'} = $title || '(no commit message)';
2841                 $ref_item{'epoch'} = $epoch;
2842                 if ($epoch) {
2843                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2844                 } else {
2845                         $ref_item{'age'} = "unknown";
2846                 }
2847
2848                 push @headslist, \%ref_item;
2849         }
2850         close $fd;
2851
2852         return wantarray ? @headslist : \@headslist;
2853 }
2854
2855 sub git_get_tags_list {
2856         my $limit = shift;
2857         my @tagslist;
2858
2859         open my $fd, '-|', git_cmd(), 'for-each-ref',
2860                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2861                 '--format=%(objectname) %(objecttype) %(refname) '.
2862                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2863                 'refs/tags'
2864                 or return;
2865         while (my $line = <$fd>) {
2866                 my %ref_item;
2867
2868                 chomp $line;
2869                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2870                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2871                 my ($creator, $epoch, $tz) =
2872                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2873                 $ref_item{'fullname'} = $name;
2874                 $name =~ s!^refs/tags/!!;
2875
2876                 $ref_item{'type'} = $type;
2877                 $ref_item{'id'} = $id;
2878                 $ref_item{'name'} = $name;
2879                 if ($type eq "tag") {
2880                         $ref_item{'subject'} = $title;
2881                         $ref_item{'reftype'} = $reftype;
2882                         $ref_item{'refid'}   = $refid;
2883                 } else {
2884                         $ref_item{'reftype'} = $type;
2885                         $ref_item{'refid'}   = $id;
2886                 }
2887
2888                 if ($type eq "tag" || $type eq "commit") {
2889                         $ref_item{'epoch'} = $epoch;
2890                         if ($epoch) {
2891                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2892                         } else {
2893                                 $ref_item{'age'} = "unknown";
2894                         }
2895                 }
2896
2897                 push @tagslist, \%ref_item;
2898         }
2899         close $fd;
2900
2901         return wantarray ? @tagslist : \@tagslist;
2902 }
2903
2904 ## ----------------------------------------------------------------------
2905 ## filesystem-related functions
2906
2907 sub get_file_owner {
2908         my $path = shift;
2909
2910         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2911         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2912         if (!defined $gcos) {
2913                 return undef;
2914         }
2915         my $owner = $gcos;
2916         $owner =~ s/[,;].*$//;
2917         return to_utf8($owner);
2918 }
2919
2920 # assume that file exists
2921 sub insert_file {
2922         my $filename = shift;
2923
2924         open my $fd, '<', $filename;
2925         print map { to_utf8($_) } <$fd>;
2926         close $fd;
2927 }
2928
2929 ## ......................................................................
2930 ## mimetype related functions
2931
2932 sub mimetype_guess_file {
2933         my $filename = shift;
2934         my $mimemap = shift;
2935         -r $mimemap or return undef;
2936
2937         my %mimemap;
2938         open(my $mh, '<', $mimemap) or return undef;
2939         while (<$mh>) {
2940                 next if m/^#/; # skip comments
2941                 my ($mimetype, $exts) = split(/\t+/);
2942                 if (defined $exts) {
2943                         my @exts = split(/\s+/, $exts);
2944                         foreach my $ext (@exts) {
2945                                 $mimemap{$ext} = $mimetype;
2946                         }
2947                 }
2948         }
2949         close($mh);
2950
2951         $filename =~ /\.([^.]*)$/;
2952         return $mimemap{$1};
2953 }
2954
2955 sub mimetype_guess {
2956         my $filename = shift;
2957         my $mime;
2958         $filename =~ /\./ or return undef;
2959
2960         if ($mimetypes_file) {
2961                 my $file = $mimetypes_file;
2962                 if ($file !~ m!^/!) { # if it is relative path
2963                         # it is relative to project
2964                         $file = "$projectroot/$project/$file";
2965                 }
2966                 $mime = mimetype_guess_file($filename, $file);
2967         }
2968         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2969         return $mime;
2970 }
2971
2972 sub blob_mimetype {
2973         my $fd = shift;
2974         my $filename = shift;
2975
2976         if ($filename) {
2977                 my $mime = mimetype_guess($filename);
2978                 $mime and return $mime;
2979         }
2980
2981         # just in case
2982         return $default_blob_plain_mimetype unless $fd;
2983
2984         if (-T $fd) {
2985                 return 'text/plain';
2986         } elsif (! $filename) {
2987                 return 'application/octet-stream';
2988         } elsif ($filename =~ m/\.png$/i) {
2989                 return 'image/png';
2990         } elsif ($filename =~ m/\.gif$/i) {
2991                 return 'image/gif';
2992         } elsif ($filename =~ m/\.jpe?g$/i) {
2993                 return 'image/jpeg';
2994         } else {
2995                 return 'application/octet-stream';
2996         }
2997 }
2998
2999 sub blob_contenttype {
3000         my ($fd, $file_name, $type) = @_;
3001
3002         $type ||= blob_mimetype($fd, $file_name);
3003         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3004                 $type .= "; charset=$default_text_plain_charset";
3005         }
3006
3007         return $type;
3008 }
3009
3010 ## ======================================================================
3011 ## functions printing HTML: header, footer, error page
3012
3013 sub git_header_html {
3014         my $status = shift || "200 OK";
3015         my $expires = shift;
3016
3017         my $title = "$site_name";
3018         if (defined $project) {
3019                 $title .= " - " . to_utf8($project);
3020                 if (defined $action) {
3021                         $title .= "/$action";
3022                         if (defined $file_name) {
3023                                 $title .= " - " . esc_path($file_name);
3024                                 if ($action eq "tree" && $file_name !~ m|/$|) {
3025                                         $title .= "/";
3026                                 }
3027                         }
3028                 }
3029         }
3030         my $content_type;
3031         # require explicit support from the UA if we are to send the page as
3032         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3033         # we have to do this because MSIE sometimes globs '*/*', pretending to
3034         # support xhtml+xml but choking when it gets what it asked for.
3035         if (defined $cgi->http('HTTP_ACCEPT') &&
3036             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3037             $cgi->Accept('application/xhtml+xml') != 0) {
3038                 $content_type = 'application/xhtml+xml';
3039         } else {
3040                 $content_type = 'text/html';
3041         }
3042         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3043                            -status=> $status, -expires => $expires);
3044         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3045         print <<EOF;
3046 <?xml version="1.0" encoding="utf-8"?>
3047 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3048 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3049 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3050 <!-- git core binaries version $git_version -->
3051 <head>
3052 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3053 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3054 <meta name="robots" content="index, nofollow"/>
3055 <title>$title</title>
3056 EOF
3057         # the stylesheet, favicon etc urls won't work correctly with path_info
3058         # unless we set the appropriate base URL
3059         if ($ENV{'PATH_INFO'}) {
3060                 print "<base href=\"".esc_url($base_url)."\" />\n";
3061         }
3062         # print out each stylesheet that exist, providing backwards capability
3063         # for those people who defined $stylesheet in a config file
3064         if (defined $stylesheet) {
3065                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3066         } else {
3067                 foreach my $stylesheet (@stylesheets) {
3068                         next unless $stylesheet;
3069                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3070                 }
3071         }
3072         if (defined $project) {
3073                 my %href_params = get_feed_info();
3074                 if (!exists $href_params{'-title'}) {
3075                         $href_params{'-title'} = 'log';
3076                 }
3077
3078                 foreach my $format qw(RSS Atom) {
3079                         my $type = lc($format);
3080                         my %link_attr = (
3081                                 '-rel' => 'alternate',
3082                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3083                                 '-type' => "application/$type+xml"
3084                         );
3085
3086                         $href_params{'action'} = $type;
3087                         $link_attr{'-href'} = href(%href_params);
3088                         print "<link ".
3089                               "rel=\"$link_attr{'-rel'}\" ".
3090                               "title=\"$link_attr{'-title'}\" ".
3091                               "href=\"$link_attr{'-href'}\" ".
3092                               "type=\"$link_attr{'-type'}\" ".
3093                               "/>\n";
3094
3095                         $href_params{'extra_options'} = '--no-merges';
3096                         $link_attr{'-href'} = href(%href_params);
3097                         $link_attr{'-title'} .= ' (no merges)';
3098                         print "<link ".
3099                               "rel=\"$link_attr{'-rel'}\" ".
3100                               "title=\"$link_attr{'-title'}\" ".
3101                               "href=\"$link_attr{'-href'}\" ".
3102                               "type=\"$link_attr{'-type'}\" ".
3103                               "/>\n";
3104                 }
3105
3106         } else {
3107                 printf('<link rel="alternate" title="%s projects list" '.
3108                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3109                        $site_name, href(project=>undef, action=>"project_index"));
3110                 printf('<link rel="alternate" title="%s projects feeds" '.
3111                        'href="%s" type="text/x-opml" />'."\n",
3112                        $site_name, href(project=>undef, action=>"opml"));
3113         }
3114         if (defined $favicon) {
3115                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3116         }
3117
3118         print "</head>\n" .
3119               "<body>\n";
3120
3121         if (-f $site_header) {
3122                 insert_file($site_header);
3123         }
3124
3125         print "<div class=\"page_header\">\n" .
3126               $cgi->a({-href => esc_url($logo_url),
3127                        -title => $logo_label},
3128                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3129         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3130         if (defined $project) {
3131                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3132                 if (defined $action) {
3133                         print " / $action";
3134                 }
3135                 print "\n";
3136         }
3137         print "</div>\n";
3138
3139         my $have_search = gitweb_check_feature('search');
3140         if (defined $project && $have_search) {
3141                 if (!defined $searchtext) {
3142                         $searchtext = "";
3143                 }
3144                 my $search_hash;
3145                 if (defined $hash_base) {
3146                         $search_hash = $hash_base;
3147                 } elsif (defined $hash) {
3148                         $search_hash = $hash;
3149                 } else {
3150                         $search_hash = "HEAD";
3151                 }
3152                 my $action = $my_uri;
3153                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3154                 if ($use_pathinfo) {
3155                         $action .= "/".esc_url($project);
3156                 }
3157                 print $cgi->startform(-method => "get", -action => $action) .
3158                       "<div class=\"search\">\n" .
3159                       (!$use_pathinfo &&
3160                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3161                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3162                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3163                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3164                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3165                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3166                       " search:\n",
3167                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3168                       "<span title=\"Extended regular expression\">" .
3169                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3170                                      -checked => $search_use_regexp) .
3171                       "</span>" .
3172                       "</div>" .
3173                       $cgi->end_form() . "\n";
3174         }
3175 }
3176
3177 sub git_footer_html {
3178         my $feed_class = 'rss_logo';
3179
3180         print "<div class=\"page_footer\">\n";
3181         if (defined $project) {
3182                 my $descr = git_get_project_description($project);
3183                 if (defined $descr) {
3184                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3185                 }
3186
3187                 my %href_params = get_feed_info();
3188                 if (!%href_params) {
3189                         $feed_class .= ' generic';
3190                 }
3191                 $href_params{'-title'} ||= 'log';
3192
3193                 foreach my $format qw(RSS Atom) {
3194                         $href_params{'action'} = lc($format);
3195                         print $cgi->a({-href => href(%href_params),
3196                                       -title => "$href_params{'-title'} $format feed",
3197                                       -class => $feed_class}, $format)."\n";
3198                 }
3199
3200         } else {
3201                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3202                               -class => $feed_class}, "OPML") . " ";
3203                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3204                               -class => $feed_class}, "TXT") . "\n";
3205         }
3206         print "</div>\n"; # class="page_footer"
3207
3208         if (-f $site_footer) {
3209                 insert_file($site_footer);
3210         }
3211
3212         print "</body>\n" .
3213               "</html>";
3214 }
3215
3216 # die_error(<http_status_code>, <error_message>)
3217 # Example: die_error(404, 'Hash not found')
3218 # By convention, use the following status codes (as defined in RFC 2616):
3219 # 400: Invalid or missing CGI parameters, or
3220 #      requested object exists but has wrong type.
3221 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3222 #      this server or project.
3223 # 404: Requested object/revision/project doesn't exist.
3224 # 500: The server isn't configured properly, or
3225 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3226 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3227 sub die_error {
3228         my $status = shift || 500;
3229         my $error = shift || "Internal server error";
3230
3231         my %http_responses = (400 => '400 Bad Request',
3232                               403 => '403 Forbidden',
3233                               404 => '404 Not Found',
3234                               500 => '500 Internal Server Error');
3235         git_header_html($http_responses{$status});
3236         print <<EOF;
3237 <div class="page_body">
3238 <br /><br />
3239 $status - $error
3240 <br />
3241 </div>
3242 EOF
3243         git_footer_html();
3244         exit;
3245 }
3246
3247 ## ----------------------------------------------------------------------
3248 ## functions printing or outputting HTML: navigation
3249
3250 sub git_print_page_nav {
3251         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3252         $extra = '' if !defined $extra; # pager or formats
3253
3254         my @navs = qw(summary shortlog log commit commitdiff tree);
3255         if ($suppress) {
3256                 @navs = grep { $_ ne $suppress } @navs;
3257         }
3258
3259         my %arg = map { $_ => {action=>$_} } @navs;
3260         if (defined $head) {
3261                 for (qw(commit commitdiff)) {
3262                         $arg{$_}{'hash'} = $head;
3263                 }
3264                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3265                         for (qw(shortlog log)) {
3266                                 $arg{$_}{'hash'} = $head;
3267                         }
3268                 }
3269         }
3270
3271         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3272         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3273
3274         my @actions = gitweb_get_feature('actions');
3275         my %repl = (
3276                 '%' => '%',
3277                 'n' => $project,         # project name
3278                 'f' => $git_dir,         # project path within filesystem
3279                 'h' => $treehead || '',  # current hash ('h' parameter)
3280                 'b' => $treebase || '',  # hash base ('hb' parameter)
3281         );
3282         while (@actions) {
3283                 my ($label, $link, $pos) = splice(@actions,0,3);
3284                 # insert
3285                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3286                 # munch munch
3287                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3288                 $arg{$label}{'_href'} = $link;
3289         }
3290
3291         print "<div class=\"page_nav\">\n" .
3292                 (join " | ",
3293                  map { $_ eq $current ?
3294                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3295                  } @navs);
3296         print "<br/>\n$extra<br/>\n" .
3297               "</div>\n";
3298 }
3299
3300 sub format_paging_nav {
3301         my ($action, $hash, $head, $page, $has_next_link) = @_;
3302         my $paging_nav;
3303
3304
3305         if ($hash ne $head || $page) {
3306                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3307         } else {
3308                 $paging_nav .= "HEAD";
3309         }
3310
3311         if ($page > 0) {
3312                 $paging_nav .= " &sdot; " .
3313                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3314                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3315         } else {
3316                 $paging_nav .= " &sdot; prev";
3317         }
3318
3319         if ($has_next_link) {
3320                 $paging_nav .= " &sdot; " .
3321                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3322                                  -accesskey => "n", -title => "Alt-n"}, "next");
3323         } else {
3324                 $paging_nav .= " &sdot; next";
3325         }
3326
3327         return $paging_nav;
3328 }
3329
3330 ## ......................................................................
3331 ## functions printing or outputting HTML: div
3332
3333 sub git_print_header_div {
3334         my ($action, $title, $hash, $hash_base) = @_;
3335         my %args = ();
3336
3337         $args{'action'} = $action;
3338         $args{'hash'} = $hash if $hash;
3339         $args{'hash_base'} = $hash_base if $hash_base;
3340
3341         print "<div class=\"header\">\n" .
3342               $cgi->a({-href => href(%args), -class => "title"},
3343               $title ? $title : $action) .
3344               "\n</div>\n";
3345 }
3346
3347 sub print_local_time {
3348         my %date = @_;
3349         if ($date{'hour_local'} < 6) {
3350                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3351                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3352         } else {
3353                 printf(" (%02d:%02d %s)",
3354                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3355         }
3356 }
3357
3358 # Outputs the author name and date in long form
3359 sub git_print_authorship {
3360         my $co = shift;
3361         my %opts = @_;
3362         my $tag = $opts{-tag} || 'div';
3363
3364         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3365         print "<$tag class=\"author_date\">" .
3366               esc_html($co->{'author_name'}) .
3367               " [$ad{'rfc2822'}";
3368         print_local_time(%ad) if ($opts{-localtime});
3369         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3370                   . "</$tag>\n";
3371 }
3372
3373 # Outputs table rows containing the full author or committer information,
3374 # in the format expected for 'commit' view (& similia).
3375 # Parameters are a commit hash reference, followed by the list of people
3376 # to output information for. If the list is empty it defalts to both
3377 # author and committer.
3378 sub git_print_authorship_rows {
3379         my $co = shift;
3380         # too bad we can't use @people = @_ || ('author', 'committer')
3381         my @people = @_;
3382         @people = ('author', 'committer') unless @people;
3383         foreach my $who (@people) {
3384                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3385                 print "<tr><td>$who</td><td>" . esc_html($co->{$who}) . "</td>" .
3386                       "<td rowspan=\"2\">" .
3387                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3388                       "</td></tr>\n" .
3389                       "<tr>" .
3390                       "<td></td><td> $wd{'rfc2822'}";
3391                 print_local_time(%wd);
3392                 print "</td>" .
3393                       "</tr>\n";
3394         }
3395 }
3396
3397 sub git_print_page_path {
3398         my $name = shift;
3399         my $type = shift;
3400         my $hb = shift;
3401
3402
3403         print "<div class=\"page_path\">";
3404         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3405                       -title => 'tree root'}, to_utf8("[$project]"));
3406         print " / ";
3407         if (defined $name) {
3408                 my @dirname = split '/', $name;
3409                 my $basename = pop @dirname;
3410                 my $fullname = '';
3411
3412                 foreach my $dir (@dirname) {
3413                         $fullname .= ($fullname ? '/' : '') . $dir;
3414                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3415                                                      hash_base=>$hb),
3416                                       -title => $fullname}, esc_path($dir));
3417                         print " / ";
3418                 }
3419                 if (defined $type && $type eq 'blob') {
3420                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3421                                                      hash_base=>$hb),
3422                                       -title => $name}, esc_path($basename));
3423                 } elsif (defined $type && $type eq 'tree') {
3424                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3425                                                      hash_base=>$hb),
3426                                       -title => $name}, esc_path($basename));
3427                         print " / ";
3428                 } else {
3429                         print esc_path($basename);
3430                 }
3431         }
3432         print "<br/></div>\n";
3433 }
3434
3435 sub git_print_log {
3436         my $log = shift;
3437         my %opts = @_;
3438
3439         if ($opts{'-remove_title'}) {
3440                 # remove title, i.e. first line of log
3441                 shift @$log;
3442         }
3443         # remove leading empty lines
3444         while (defined $log->[0] && $log->[0] eq "") {
3445                 shift @$log;
3446         }
3447
3448         # print log
3449         my $signoff = 0;
3450         my $empty = 0;
3451         foreach my $line (@$log) {
3452                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3453                         $signoff = 1;
3454                         $empty = 0;
3455                         if (! $opts{'-remove_signoff'}) {
3456                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3457                                 next;
3458                         } else {
3459                                 # remove signoff lines
3460                                 next;
3461                         }
3462                 } else {
3463                         $signoff = 0;
3464                 }
3465
3466                 # print only one empty line
3467                 # do not print empty line after signoff
3468                 if ($line eq "") {
3469                         next if ($empty || $signoff);
3470                         $empty = 1;
3471                 } else {
3472                         $empty = 0;
3473                 }
3474
3475                 print format_log_line_html($line) . "<br/>\n";
3476         }
3477
3478         if ($opts{'-final_empty_line'}) {
3479                 # end with single empty line
3480                 print "<br/>\n" unless $empty;
3481         }
3482 }
3483
3484 # return link target (what link points to)
3485 sub git_get_link_target {
3486         my $hash = shift;
3487         my $link_target;
3488
3489         # read link
3490         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3491                 or return;
3492         {
3493                 local $/ = undef;
3494                 $link_target = <$fd>;
3495         }
3496         close $fd
3497                 or return;
3498
3499         return $link_target;
3500 }
3501
3502 # given link target, and the directory (basedir) the link is in,
3503 # return target of link relative to top directory (top tree);
3504 # return undef if it is not possible (including absolute links).
3505 sub normalize_link_target {
3506         my ($link_target, $basedir) = @_;
3507
3508         # absolute symlinks (beginning with '/') cannot be normalized
3509         return if (substr($link_target, 0, 1) eq '/');
3510
3511         # normalize link target to path from top (root) tree (dir)
3512         my $path;
3513         if ($basedir) {
3514                 $path = $basedir . '/' . $link_target;
3515         } else {
3516                 # we are in top (root) tree (dir)
3517                 $path = $link_target;
3518         }
3519
3520         # remove //, /./, and /../
3521         my @path_parts;
3522         foreach my $part (split('/', $path)) {
3523                 # discard '.' and ''
3524                 next if (!$part || $part eq '.');
3525                 # handle '..'
3526                 if ($part eq '..') {
3527                         if (@path_parts) {
3528                                 pop @path_parts;
3529                         } else {
3530                                 # link leads outside repository (outside top dir)
3531                                 return;
3532                         }
3533                 } else {
3534                         push @path_parts, $part;
3535                 }
3536         }
3537         $path = join('/', @path_parts);
3538
3539         return $path;
3540 }
3541
3542 # print tree entry (row of git_tree), but without encompassing <tr> element
3543 sub git_print_tree_entry {
3544         my ($t, $basedir, $hash_base, $have_blame) = @_;
3545
3546         my %base_key = ();
3547         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3548
3549         # The format of a table row is: mode list link.  Where mode is
3550         # the mode of the entry, list is the name of the entry, an href,
3551         # and link is the action links of the entry.
3552
3553         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3554         if ($t->{'type'} eq "blob") {
3555                 print "<td class=\"list\">" .
3556                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3557                                                file_name=>"$basedir$t->{'name'}", %base_key),
3558                                 -class => "list"}, esc_path($t->{'name'}));
3559                 if (S_ISLNK(oct $t->{'mode'})) {
3560                         my $link_target = git_get_link_target($t->{'hash'});
3561                         if ($link_target) {
3562                                 my $norm_target = normalize_link_target($link_target, $basedir);
3563                                 if (defined $norm_target) {
3564                                         print " -> " .
3565                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3566                                                                      file_name=>$norm_target),
3567                                                        -title => $norm_target}, esc_path($link_target));
3568                                 } else {
3569                                         print " -> " . esc_path($link_target);
3570                                 }
3571                         }
3572                 }
3573                 print "</td>\n";
3574                 print "<td class=\"link\">";
3575                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3576                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3577                               "blob");
3578                 if ($have_blame) {
3579                         print " | " .
3580                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3581                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3582                                       "blame");
3583                 }
3584                 if (defined $hash_base) {
3585                         print " | " .
3586                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3587                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3588                                       "history");
3589                 }
3590                 print " | " .
3591                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3592                                                file_name=>"$basedir$t->{'name'}")},
3593                                 "raw");
3594                 print "</td>\n";
3595
3596         } elsif ($t->{'type'} eq "tree") {
3597                 print "<td class=\"list\">";
3598                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3599                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3600                               esc_path($t->{'name'}));
3601                 print "</td>\n";
3602                 print "<td class=\"link\">";
3603                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3604                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3605                               "tree");
3606                 if (defined $hash_base) {
3607                         print " | " .
3608                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3609                                                      file_name=>"$basedir$t->{'name'}")},
3610                                       "history");
3611                 }
3612                 print "</td>\n";
3613         } else {
3614                 # unknown object: we can only present history for it
3615                 # (this includes 'commit' object, i.e. submodule support)
3616                 print "<td class=\"list\">" .
3617                       esc_path($t->{'name'}) .
3618                       "</td>\n";
3619                 print "<td class=\"link\">";
3620                 if (defined $hash_base) {
3621                         print $cgi->a({-href => href(action=>"history",
3622                                                      hash_base=>$hash_base,
3623                                                      file_name=>"$basedir$t->{'name'}")},
3624                                       "history");
3625                 }
3626                 print "</td>\n";
3627         }
3628 }
3629
3630 ## ......................................................................
3631 ## functions printing large fragments of HTML
3632
3633 # get pre-image filenames for merge (combined) diff
3634 sub fill_from_file_info {
3635         my ($diff, @parents) = @_;
3636
3637         $diff->{'from_file'} = [ ];
3638         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3639         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3640                 if ($diff->{'status'}[$i] eq 'R' ||
3641                     $diff->{'status'}[$i] eq 'C') {
3642                         $diff->{'from_file'}[$i] =
3643                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3644                 }
3645         }
3646
3647         return $diff;
3648 }
3649
3650 # is current raw difftree line of file deletion
3651 sub is_deleted {
3652         my $diffinfo = shift;
3653
3654         return $diffinfo->{'to_id'} eq ('0' x 40);
3655 }
3656
3657 # does patch correspond to [previous] difftree raw line
3658 # $diffinfo  - hashref of parsed raw diff format
3659 # $patchinfo - hashref of parsed patch diff format
3660 #              (the same keys as in $diffinfo)
3661 sub is_patch_split {
3662         my ($diffinfo, $patchinfo) = @_;
3663
3664         return defined $diffinfo && defined $patchinfo
3665                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3666 }
3667
3668
3669 sub git_difftree_body {
3670         my ($difftree, $hash, @parents) = @_;
3671         my ($parent) = $parents[0];
3672         my $have_blame = gitweb_check_feature('blame');
3673         print "<div class=\"list_head\">\n";
3674         if ($#{$difftree} > 10) {
3675                 print(($#{$difftree} + 1) . " files changed:\n");
3676         }
3677         print "</div>\n";
3678
3679         print "<table class=\"" .
3680               (@parents > 1 ? "combined " : "") .
3681               "diff_tree\">\n";
3682
3683         # header only for combined diff in 'commitdiff' view
3684         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3685         if ($has_header) {
3686                 # table header
3687                 print "<thead><tr>\n" .
3688                        "<th></th><th></th>\n"; # filename, patchN link
3689                 for (my $i = 0; $i < @parents; $i++) {
3690                         my $par = $parents[$i];
3691                         print "<th>" .
3692                               $cgi->a({-href => href(action=>"commitdiff",
3693                                                      hash=>$hash, hash_parent=>$par),
3694                                        -title => 'commitdiff to parent number ' .
3695                                                   ($i+1) . ': ' . substr($par,0,7)},
3696                                       $i+1) .
3697                               "&nbsp;</th>\n";
3698                 }
3699                 print "</tr></thead>\n<tbody>\n";
3700         }
3701
3702         my $alternate = 1;
3703         my $patchno = 0;
3704         foreach my $line (@{$difftree}) {
3705                 my $diff = parsed_difftree_line($line);
3706
3707                 if ($alternate) {
3708                         print "<tr class=\"dark\">\n";
3709                 } else {
3710                         print "<tr class=\"light\">\n";
3711                 }
3712                 $alternate ^= 1;
3713
3714                 if (exists $diff->{'nparents'}) { # combined diff
3715
3716                         fill_from_file_info($diff, @parents)
3717                                 unless exists $diff->{'from_file'};
3718
3719                         if (!is_deleted($diff)) {
3720                                 # file exists in the result (child) commit
3721                                 print "<td>" .
3722                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3723                                                              file_name=>$diff->{'to_file'},
3724                                                              hash_base=>$hash),
3725                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3726                                       "</td>\n";
3727                         } else {
3728                                 print "<td>" .
3729                                       esc_path($diff->{'to_file'}) .
3730                                       "</td>\n";
3731                         }
3732
3733                         if ($action eq 'commitdiff') {
3734                                 # link to patch
3735                                 $patchno++;
3736                                 print "<td class=\"link\">" .
3737                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3738                                       " | " .
3739                                       "</td>\n";
3740                         }
3741
3742                         my $has_history = 0;
3743                         my $not_deleted = 0;
3744                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3745                                 my $hash_parent = $parents[$i];
3746                                 my $from_hash = $diff->{'from_id'}[$i];
3747                                 my $from_path = $diff->{'from_file'}[$i];
3748                                 my $status = $diff->{'status'}[$i];
3749
3750                                 $has_history ||= ($status ne 'A');
3751                                 $not_deleted ||= ($status ne 'D');
3752
3753                                 if ($status eq 'A') {
3754                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3755                                 } elsif ($status eq 'D') {
3756                                         print "<td class=\"link\">" .
3757                                               $cgi->a({-href => href(action=>"blob",
3758                                                                      hash_base=>$hash,
3759                                                                      hash=>$from_hash,
3760                                                                      file_name=>$from_path)},
3761                                                       "blob" . ($i+1)) .
3762                                               " | </td>\n";
3763                                 } else {
3764                                         if ($diff->{'to_id'} eq $from_hash) {
3765                                                 print "<td class=\"link nochange\">";
3766                                         } else {
3767                                                 print "<td class=\"link\">";
3768                                         }
3769                                         print $cgi->a({-href => href(action=>"blobdiff",
3770                                                                      hash=>$diff->{'to_id'},
3771                                                                      hash_parent=>$from_hash,
3772                                                                      hash_base=>$hash,
3773                                                                      hash_parent_base=>$hash_parent,
3774                                                                      file_name=>$diff->{'to_file'},
3775                                                                      file_parent=>$from_path)},
3776                                                       "diff" . ($i+1)) .
3777                                               " | </td>\n";
3778                                 }
3779                         }
3780
3781                         print "<td class=\"link\">";
3782                         if ($not_deleted) {
3783                                 print $cgi->a({-href => href(action=>"blob",
3784                                                              hash=>$diff->{'to_id'},
3785                                                              file_name=>$diff->{'to_file'},
3786                                                              hash_base=>$hash)},
3787                                               "blob");
3788                                 print " | " if ($has_history);
3789                         }
3790                         if ($has_history) {
3791                                 print $cgi->a({-href => href(action=>"history",
3792                                                              file_name=>$diff->{'to_file'},
3793                                                              hash_base=>$hash)},
3794                                               "history");
3795                         }
3796                         print "</td>\n";
3797
3798                         print "</tr>\n";
3799                         next; # instead of 'else' clause, to avoid extra indent
3800                 }
3801                 # else ordinary diff
3802
3803                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3804                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3805                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3806                         $to_mode_oct = oct $diff->{'to_mode'};
3807                         if (S_ISREG($to_mode_oct)) { # only for regular file
3808                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3809                         }
3810                         $to_file_type = file_type($diff->{'to_mode'});
3811                 }
3812                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3813                         $from_mode_oct = oct $diff->{'from_mode'};
3814                         if (S_ISREG($to_mode_oct)) { # only for regular file
3815                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3816                         }
3817                         $from_file_type = file_type($diff->{'from_mode'});
3818                 }
3819
3820                 if ($diff->{'status'} eq "A") { # created
3821                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3822                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3823                         $mode_chng   .= "]</span>";
3824                         print "<td>";
3825                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3826                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3827                                       -class => "list"}, esc_path($diff->{'file'}));
3828                         print "</td>\n";
3829                         print "<td>$mode_chng</td>\n";
3830                         print "<td class=\"link\">";
3831                         if ($action eq 'commitdiff') {
3832                                 # link to patch
3833                                 $patchno++;
3834                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3835                                 print " | ";
3836                         }
3837                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3838                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3839                                       "blob");
3840                         print "</td>\n";
3841
3842                 } elsif ($diff->{'status'} eq "D") { # deleted
3843                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3844                         print "<td>";
3845                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3846                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3847                                        -class => "list"}, esc_path($diff->{'file'}));
3848                         print "</td>\n";
3849                         print "<td>$mode_chng</td>\n";
3850                         print "<td class=\"link\">";
3851                         if ($action eq 'commitdiff') {
3852                                 # link to patch
3853                                 $patchno++;
3854                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3855                                 print " | ";
3856                         }
3857                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3858                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3859                                       "blob") . " | ";
3860                         if ($have_blame) {
3861                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3862                                                              file_name=>$diff->{'file'})},
3863                                               "blame") . " | ";
3864                         }
3865                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3866                                                      file_name=>$diff->{'file'})},
3867                                       "history");
3868                         print "</td>\n";
3869
3870                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3871                         my $mode_chnge = "";
3872                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3873                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3874                                 if ($from_file_type ne $to_file_type) {
3875                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3876                                 }
3877                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3878                                         if ($from_mode_str && $to_mode_str) {
3879                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3880                                         } elsif ($to_mode_str) {
3881                                                 $mode_chnge .= " mode: $to_mode_str";
3882                                         }
3883                                 }
3884                                 $mode_chnge .= "]</span>\n";
3885                         }
3886                         print "<td>";
3887                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3888                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3889                                       -class => "list"}, esc_path($diff->{'file'}));
3890                         print "</td>\n";
3891                         print "<td>$mode_chnge</td>\n";
3892                         print "<td class=\"link\">";
3893                         if ($action eq 'commitdiff') {
3894                                 # link to patch
3895                                 $patchno++;
3896                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3897                                       " | ";
3898                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3899                                 # "commit" view and modified file (not onlu mode changed)
3900                                 print $cgi->a({-href => href(action=>"blobdiff",
3901                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3902                                                              hash_base=>$hash, hash_parent_base=>$parent,
3903                                                              file_name=>$diff->{'file'})},
3904                                               "diff") .
3905                                       " | ";
3906                         }
3907                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3908                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3909                                        "blob") . " | ";
3910                         if ($have_blame) {
3911                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3912                                                              file_name=>$diff->{'file'})},
3913                                               "blame") . " | ";
3914                         }
3915                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3916                                                      file_name=>$diff->{'file'})},
3917                                       "history");
3918                         print "</td>\n";
3919
3920                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3921                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3922                         my $nstatus = $status_name{$diff->{'status'}};
3923                         my $mode_chng = "";
3924                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3925                                 # mode also for directories, so we cannot use $to_mode_str
3926                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3927                         }
3928                         print "<td>" .
3929                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3930                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3931                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3932                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3933                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3934                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3935                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3936                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3937                               "<td class=\"link\">";
3938                         if ($action eq 'commitdiff') {
3939                                 # link to patch
3940                                 $patchno++;
3941                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3942                                       " | ";
3943                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3944                                 # "commit" view and modified file (not only pure rename or copy)
3945                                 print $cgi->a({-href => href(action=>"blobdiff",
3946                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3947                                                              hash_base=>$hash, hash_parent_base=>$parent,
3948                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3949                                               "diff") .
3950                                       " | ";
3951                         }
3952                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3953                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3954                                       "blob") . " | ";
3955                         if ($have_blame) {
3956                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3957                                                              file_name=>$diff->{'to_file'})},
3958                                               "blame") . " | ";
3959                         }
3960                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3961                                                     file_name=>$diff->{'to_file'})},
3962                                       "history");
3963                         print "</td>\n";
3964
3965                 } # we should not encounter Unmerged (U) or Unknown (X) status
3966                 print "</tr>\n";
3967         }
3968         print "</tbody>" if $has_header;
3969         print "</table>\n";
3970 }
3971
3972 sub git_patchset_body {
3973         my ($fd, $difftree, $hash, @hash_parents) = @_;
3974         my ($hash_parent) = $hash_parents[0];
3975
3976         my $is_combined = (@hash_parents > 1);
3977         my $patch_idx = 0;
3978         my $patch_number = 0;
3979         my $patch_line;
3980         my $diffinfo;
3981         my $to_name;
3982         my (%from, %to);
3983
3984         print "<div class=\"patchset\">\n";
3985
3986         # skip to first patch
3987         while ($patch_line = <$fd>) {
3988                 chomp $patch_line;
3989
3990                 last if ($patch_line =~ m/^diff /);
3991         }
3992
3993  PATCH:
3994         while ($patch_line) {
3995
3996                 # parse "git diff" header line
3997                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3998                         # $1 is from_name, which we do not use
3999                         $to_name = unquote($2);
4000                         $to_name =~ s!^b/!!;
4001                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4002                         # $1 is 'cc' or 'combined', which we do not use
4003                         $to_name = unquote($2);
4004                 } else {
4005                         $to_name = undef;
4006                 }
4007
4008                 # check if current patch belong to current raw line
4009                 # and parse raw git-diff line if needed
4010                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4011                         # this is continuation of a split patch
4012                         print "<div class=\"patch cont\">\n";
4013                 } else {
4014                         # advance raw git-diff output if needed
4015                         $patch_idx++ if defined $diffinfo;
4016
4017                         # read and prepare patch information
4018                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4019
4020                         # compact combined diff output can have some patches skipped
4021                         # find which patch (using pathname of result) we are at now;
4022                         if ($is_combined) {
4023                                 while ($to_name ne $diffinfo->{'to_file'}) {
4024                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4025                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4026                                               "</div>\n";  # class="patch"
4027
4028                                         $patch_idx++;
4029                                         $patch_number++;
4030
4031                                         last if $patch_idx > $#$difftree;
4032                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4033                                 }
4034                         }
4035
4036                         # modifies %from, %to hashes
4037                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4038
4039                         # this is first patch for raw difftree line with $patch_idx index
4040                         # we index @$difftree array from 0, but number patches from 1
4041                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4042                 }
4043
4044                 # git diff header
4045                 #assert($patch_line =~ m/^diff /) if DEBUG;
4046                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4047                 $patch_number++;
4048                 # print "git diff" header
4049                 print format_git_diff_header_line($patch_line, $diffinfo,
4050                                                   \%from, \%to);
4051
4052                 # print extended diff header
4053                 print "<div class=\"diff extended_header\">\n";
4054         EXTENDED_HEADER:
4055                 while ($patch_line = <$fd>) {
4056                         chomp $patch_line;
4057
4058                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4059
4060                         print format_extended_diff_header_line($patch_line, $diffinfo,
4061                                                                \%from, \%to);
4062                 }
4063                 print "</div>\n"; # class="diff extended_header"
4064
4065                 # from-file/to-file diff header
4066                 if (! $patch_line) {
4067                         print "</div>\n"; # class="patch"
4068                         last PATCH;
4069                 }
4070                 next PATCH if ($patch_line =~ m/^diff /);
4071                 #assert($patch_line =~ m/^---/) if DEBUG;
4072
4073                 my $last_patch_line = $patch_line;
4074                 $patch_line = <$fd>;
4075                 chomp $patch_line;
4076                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4077
4078                 print format_diff_from_to_header($last_patch_line, $patch_line,
4079                                                  $diffinfo, \%from, \%to,
4080                                                  @hash_parents);
4081
4082                 # the patch itself
4083         LINE:
4084                 while ($patch_line = <$fd>) {
4085                         chomp $patch_line;
4086
4087                         next PATCH if ($patch_line =~ m/^diff /);
4088
4089                         print format_diff_line($patch_line, \%from, \%to);
4090                 }
4091
4092         } continue {
4093                 print "</div>\n"; # class="patch"
4094         }
4095
4096         # for compact combined (--cc) format, with chunk and patch simpliciaction
4097         # patchset might be empty, but there might be unprocessed raw lines
4098         for (++$patch_idx if $patch_number > 0;
4099              $patch_idx < @$difftree;
4100              ++$patch_idx) {
4101                 # read and prepare patch information
4102                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4103
4104                 # generate anchor for "patch" links in difftree / whatchanged part
4105                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4106                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4107                       "</div>\n";  # class="patch"
4108
4109                 $patch_number++;
4110         }
4111
4112         if ($patch_number == 0) {
4113                 if (@hash_parents > 1) {
4114                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4115                 } else {
4116                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4117                 }
4118         }
4119
4120         print "</div>\n"; # class="patchset"
4121 }
4122
4123 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4124
4125 # fills project list info (age, description, owner, forks) for each
4126 # project in the list, removing invalid projects from returned list
4127 # NOTE: modifies $projlist, but does not remove entries from it
4128 sub fill_project_list_info {
4129         my ($projlist, $check_forks) = @_;
4130         my @projects;
4131
4132         my $show_ctags = gitweb_check_feature('ctags');
4133  PROJECT:
4134         foreach my $pr (@$projlist) {
4135                 my (@activity) = git_get_last_activity($pr->{'path'});
4136                 unless (@activity) {
4137                         next PROJECT;
4138                 }
4139                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4140                 if (!defined $pr->{'descr'}) {
4141                         my $descr = git_get_project_description($pr->{'path'}) || "";
4142                         $descr = to_utf8($descr);
4143                         $pr->{'descr_long'} = $descr;
4144                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4145                 }
4146                 if (!defined $pr->{'owner'}) {
4147                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4148                 }
4149                 if ($check_forks) {
4150                         my $pname = $pr->{'path'};
4151                         if (($pname =~ s/\.git$//) &&
4152                             ($pname !~ /\/$/) &&
4153                             (-d "$projectroot/$pname")) {
4154                                 $pr->{'forks'} = "-d $projectroot/$pname";
4155                         } else {
4156                                 $pr->{'forks'} = 0;
4157                         }
4158                 }
4159                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4160                 push @projects, $pr;
4161         }
4162
4163         return @projects;
4164 }
4165
4166 # print 'sort by' <th> element, generating 'sort by $name' replay link
4167 # if that order is not selected
4168 sub print_sort_th {
4169         my ($name, $order, $header) = @_;
4170         $header ||= ucfirst($name);
4171
4172         if ($order eq $name) {
4173                 print "<th>$header</th>\n";
4174         } else {
4175                 print "<th>" .
4176                       $cgi->a({-href => href(-replay=>1, order=>$name),
4177                                -class => "header"}, $header) .
4178                       "</th>\n";
4179         }
4180 }
4181
4182 sub git_project_list_body {
4183         # actually uses global variable $project
4184         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4185
4186         my $check_forks = gitweb_check_feature('forks');
4187         my @projects = fill_project_list_info($projlist, $check_forks);
4188
4189         $order ||= $default_projects_order;
4190         $from = 0 unless defined $from;
4191         $to = $#projects if (!defined $to || $#projects < $to);
4192
4193         my %order_info = (
4194                 project => { key => 'path', type => 'str' },
4195                 descr => { key => 'descr_long', type => 'str' },
4196                 owner => { key => 'owner', type => 'str' },
4197                 age => { key => 'age', type => 'num' }
4198         );
4199         my $oi = $order_info{$order};
4200         if ($oi->{'type'} eq 'str') {
4201                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4202         } else {
4203                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4204         }
4205
4206         my $show_ctags = gitweb_check_feature('ctags');
4207         if ($show_ctags) {
4208                 my %ctags;
4209                 foreach my $p (@projects) {
4210                         foreach my $ct (keys %{$p->{'ctags'}}) {
4211                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4212                         }
4213                 }
4214                 my $cloud = git_populate_project_tagcloud(\%ctags);
4215                 print git_show_project_tagcloud($cloud, 64);
4216         }
4217
4218         print "<table class=\"project_list\">\n";
4219         unless ($no_header) {
4220                 print "<tr>\n";
4221                 if ($check_forks) {
4222                         print "<th></th>\n";
4223                 }
4224                 print_sort_th('project', $order, 'Project');
4225                 print_sort_th('descr', $order, 'Description');
4226                 print_sort_th('owner', $order, 'Owner');
4227                 print_sort_th('age', $order, 'Last Change');
4228                 print "<th></th>\n" . # for links
4229                       "</tr>\n";
4230         }
4231         my $alternate = 1;
4232         my $tagfilter = $cgi->param('by_tag');
4233         for (my $i = $from; $i <= $to; $i++) {
4234                 my $pr = $projects[$i];
4235
4236                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4237                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4238                         and not $pr->{'descr_long'} =~ /$searchtext/;
4239                 # Weed out forks or non-matching entries of search
4240                 if ($check_forks) {
4241                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4242                         $forkbase="^$forkbase" if $forkbase;
4243                         next if not $searchtext and not $tagfilter and $show_ctags
4244                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4245                 }
4246
4247                 if ($alternate) {
4248                         print "<tr class=\"dark\">\n";
4249                 } else {
4250                         print "<tr class=\"light\">\n";
4251                 }
4252                 $alternate ^= 1;
4253                 if ($check_forks) {
4254                         print "<td>";
4255                         if ($pr->{'forks'}) {
4256                                 print "<!-- $pr->{'forks'} -->\n";
4257                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4258                         }
4259                         print "</td>\n";
4260                 }
4261                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4262                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4263                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4264                                         -class => "list", -title => $pr->{'descr_long'}},
4265                                         esc_html($pr->{'descr'})) . "</td>\n" .
4266                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4267                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4268                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4269                       "<td class=\"link\">" .
4270                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4271                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4272                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4273                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4274                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4275                       "</td>\n" .
4276                       "</tr>\n";
4277         }
4278         if (defined $extra) {
4279                 print "<tr>\n";
4280                 if ($check_forks) {
4281                         print "<td></td>\n";
4282                 }
4283                 print "<td colspan=\"5\">$extra</td>\n" .
4284                       "</tr>\n";
4285         }
4286         print "</table>\n";
4287 }
4288
4289 sub git_shortlog_body {
4290         # uses global variable $project
4291         my ($commitlist, $from, $to, $refs, $extra) = @_;
4292
4293         $from = 0 unless defined $from;
4294         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4295
4296         print "<table class=\"shortlog\">\n";
4297         my $alternate = 1;
4298         for (my $i = $from; $i <= $to; $i++) {
4299                 my %co = %{$commitlist->[$i]};
4300                 my $commit = $co{'id'};
4301                 my $ref = format_ref_marker($refs, $commit);
4302                 if ($alternate) {
4303                         print "<tr class=\"dark\">\n";
4304                 } else {
4305                         print "<tr class=\"light\">\n";
4306                 }
4307                 $alternate ^= 1;
4308                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4309                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4310                       format_author_html('td', \%co, 10) . "<td>";
4311                 print format_subject_html($co{'title'}, $co{'title_short'},
4312                                           href(action=>"commit", hash=>$commit), $ref);
4313                 print "</td>\n" .
4314                       "<td class=\"link\">" .
4315                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4316                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4317                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4318                 my $snapshot_links = format_snapshot_links($commit);
4319                 if (defined $snapshot_links) {
4320                         print " | " . $snapshot_links;
4321                 }
4322                 print "</td>\n" .
4323                       "</tr>\n";
4324         }
4325         if (defined $extra) {
4326                 print "<tr>\n" .
4327                       "<td colspan=\"4\">$extra</td>\n" .
4328                       "</tr>\n";
4329         }
4330         print "</table>\n";
4331 }
4332
4333 sub git_history_body {
4334         # Warning: assumes constant type (blob or tree) during history
4335         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4336
4337         $from = 0 unless defined $from;
4338         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4339
4340         print "<table class=\"history\">\n";
4341         my $alternate = 1;
4342         for (my $i = $from; $i <= $to; $i++) {
4343                 my %co = %{$commitlist->[$i]};
4344                 if (!%co) {
4345                         next;
4346                 }
4347                 my $commit = $co{'id'};
4348
4349                 my $ref = format_ref_marker($refs, $commit);
4350
4351                 if ($alternate) {
4352                         print "<tr class=\"dark\">\n";
4353                 } else {
4354                         print "<tr class=\"light\">\n";
4355                 }
4356                 $alternate ^= 1;
4357                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4358         # shortlog:   format_author_html('td', \%co, 10)
4359                       format_author_html('td', \%co, 15, 3) . "<td>";
4360                 # originally git_history used chop_str($co{'title'}, 50)
4361                 print format_subject_html($co{'title'}, $co{'title_short'},
4362                                           href(action=>"commit", hash=>$commit), $ref);
4363                 print "</td>\n" .
4364                       "<td class=\"link\">" .
4365                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4366                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4367
4368                 if ($ftype eq 'blob') {
4369                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4370                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4371                         if (defined $blob_current && defined $blob_parent &&
4372                                         $blob_current ne $blob_parent) {
4373                                 print " | " .
4374                                         $cgi->a({-href => href(action=>"blobdiff",
4375                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4376                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4377                                                                file_name=>$file_name)},
4378                                                 "diff to current");
4379                         }
4380                 }
4381                 print "</td>\n" .
4382                       "</tr>\n";
4383         }
4384         if (defined $extra) {
4385                 print "<tr>\n" .
4386                       "<td colspan=\"4\">$extra</td>\n" .
4387                       "</tr>\n";
4388         }
4389         print "</table>\n";
4390 }
4391
4392 sub git_tags_body {
4393         # uses global variable $project
4394         my ($taglist, $from, $to, $extra) = @_;
4395         $from = 0 unless defined $from;
4396         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4397
4398         print "<table class=\"tags\">\n";
4399         my $alternate = 1;
4400         for (my $i = $from; $i <= $to; $i++) {
4401                 my $entry = $taglist->[$i];
4402                 my %tag = %$entry;
4403                 my $comment = $tag{'subject'};
4404                 my $comment_short;
4405                 if (defined $comment) {
4406                         $comment_short = chop_str($comment, 30, 5);
4407                 }
4408                 if ($alternate) {
4409                         print "<tr class=\"dark\">\n";
4410                 } else {
4411                         print "<tr class=\"light\">\n";
4412                 }
4413                 $alternate ^= 1;
4414                 if (defined $tag{'age'}) {
4415                         print "<td><i>$tag{'age'}</i></td>\n";
4416                 } else {
4417                         print "<td></td>\n";
4418                 }
4419                 print "<td>" .
4420                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4421                                -class => "list name"}, esc_html($tag{'name'})) .
4422                       "</td>\n" .
4423                       "<td>";
4424                 if (defined $comment) {
4425                         print format_subject_html($comment, $comment_short,
4426                                                   href(action=>"tag", hash=>$tag{'id'}));
4427                 }
4428                 print "</td>\n" .
4429                       "<td class=\"selflink\">";
4430                 if ($tag{'type'} eq "tag") {
4431                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4432                 } else {
4433                         print "&nbsp;";
4434                 }
4435                 print "</td>\n" .
4436                       "<td class=\"link\">" . " | " .
4437                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4438                 if ($tag{'reftype'} eq "commit") {
4439                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4440                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4441                 } elsif ($tag{'reftype'} eq "blob") {
4442                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4443                 }
4444                 print "</td>\n" .
4445                       "</tr>";
4446         }
4447         if (defined $extra) {
4448                 print "<tr>\n" .
4449                       "<td colspan=\"5\">$extra</td>\n" .
4450                       "</tr>\n";
4451         }
4452         print "</table>\n";
4453 }
4454
4455 sub git_heads_body {
4456         # uses global variable $project
4457         my ($headlist, $head, $from, $to, $extra) = @_;
4458         $from = 0 unless defined $from;
4459         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4460
4461         print "<table class=\"heads\">\n";
4462         my $alternate = 1;
4463         for (my $i = $from; $i <= $to; $i++) {
4464                 my $entry = $headlist->[$i];
4465                 my %ref = %$entry;
4466                 my $curr = $ref{'id'} eq $head;
4467                 if ($alternate) {
4468                         print "<tr class=\"dark\">\n";
4469                 } else {
4470                         print "<tr class=\"light\">\n";
4471                 }
4472                 $alternate ^= 1;
4473                 print "<td><i>$ref{'age'}</i></td>\n" .
4474                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4475                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4476                                -class => "list name"},esc_html($ref{'name'})) .
4477                       "</td>\n" .
4478                       "<td class=\"link\">" .
4479                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4480                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4481                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4482                       "</td>\n" .
4483                       "</tr>";
4484         }
4485         if (defined $extra) {
4486                 print "<tr>\n" .
4487                       "<td colspan=\"3\">$extra</td>\n" .
4488                       "</tr>\n";
4489         }
4490         print "</table>\n";
4491 }
4492
4493 sub git_search_grep_body {
4494         my ($commitlist, $from, $to, $extra) = @_;
4495         $from = 0 unless defined $from;
4496         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4497
4498         print "<table class=\"commit_search\">\n";
4499         my $alternate = 1;
4500         for (my $i = $from; $i <= $to; $i++) {
4501                 my %co = %{$commitlist->[$i]};
4502                 if (!%co) {
4503                         next;
4504                 }
4505                 my $commit = $co{'id'};
4506                 if ($alternate) {
4507                         print "<tr class=\"dark\">\n";
4508                 } else {
4509                         print "<tr class=\"light\">\n";
4510                 }
4511                 $alternate ^= 1;
4512                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4513                       format_author_html('td', \%co, 15, 5) .
4514                       "<td>" .
4515                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4516                                -class => "list subject"},
4517                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4518                 my $comment = $co{'comment'};
4519                 foreach my $line (@$comment) {
4520                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4521                                 my ($lead, $match, $trail) = ($1, $2, $3);
4522                                 $match = chop_str($match, 70, 5, 'center');
4523                                 my $contextlen = int((80 - length($match))/2);
4524                                 $contextlen = 30 if ($contextlen > 30);
4525                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4526                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4527
4528                                 $lead  = esc_html($lead);
4529                                 $match = esc_html($match);
4530                                 $trail = esc_html($trail);
4531
4532                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4533                         }
4534                 }
4535                 print "</td>\n" .
4536                       "<td class=\"link\">" .
4537                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4538                       " | " .
4539                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4540                       " | " .
4541                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4542                 print "</td>\n" .
4543                       "</tr>\n";
4544         }
4545         if (defined $extra) {
4546                 print "<tr>\n" .
4547                       "<td colspan=\"3\">$extra</td>\n" .
4548                       "</tr>\n";
4549         }
4550         print "</table>\n";
4551 }
4552
4553 ## ======================================================================
4554 ## ======================================================================
4555 ## actions
4556
4557 sub git_project_list {
4558         my $order = $input_params{'order'};
4559         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4560                 die_error(400, "Unknown order parameter");
4561         }
4562
4563         my @list = git_get_projects_list();
4564         if (!@list) {
4565                 die_error(404, "No projects found");
4566         }
4567
4568         git_header_html();
4569         if (-f $home_text) {
4570                 print "<div class=\"index_include\">\n";
4571                 insert_file($home_text);
4572                 print "</div>\n";
4573         }
4574         print $cgi->startform(-method => "get") .
4575               "<p class=\"projsearch\">Search:\n" .
4576               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4577               "</p>" .
4578               $cgi->end_form() . "\n";
4579         git_project_list_body(\@list, $order);
4580         git_footer_html();
4581 }
4582
4583 sub git_forks {
4584         my $order = $input_params{'order'};
4585         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4586                 die_error(400, "Unknown order parameter");
4587         }
4588
4589         my @list = git_get_projects_list($project);
4590         if (!@list) {
4591                 die_error(404, "No forks found");
4592         }
4593
4594         git_header_html();
4595         git_print_page_nav('','');
4596         git_print_header_div('summary', "$project forks");
4597         git_project_list_body(\@list, $order);
4598         git_footer_html();
4599 }
4600
4601 sub git_project_index {
4602         my @projects = git_get_projects_list($project);
4603
4604         print $cgi->header(
4605                 -type => 'text/plain',
4606                 -charset => 'utf-8',
4607                 -content_disposition => 'inline; filename="index.aux"');
4608
4609         foreach my $pr (@projects) {
4610                 if (!exists $pr->{'owner'}) {
4611                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4612                 }
4613
4614                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4615                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4616                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4617                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4618                 $path  =~ s/ /\+/g;
4619                 $owner =~ s/ /\+/g;
4620
4621                 print "$path $owner\n";
4622         }
4623 }
4624
4625 sub git_summary {
4626         my $descr = git_get_project_description($project) || "none";
4627         my %co = parse_commit("HEAD");
4628         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4629         my $head = $co{'id'};
4630
4631         my $owner = git_get_project_owner($project);
4632
4633         my $refs = git_get_references();
4634         # These get_*_list functions return one more to allow us to see if
4635         # there are more ...
4636         my @taglist  = git_get_tags_list(16);
4637         my @headlist = git_get_heads_list(16);
4638         my @forklist;
4639         my $check_forks = gitweb_check_feature('forks');
4640
4641         if ($check_forks) {
4642                 @forklist = git_get_projects_list($project);
4643         }
4644
4645         git_header_html();
4646         git_print_page_nav('summary','', $head);
4647
4648         print "<div class=\"title\">&nbsp;</div>\n";
4649         print "<table class=\"projects_list\">\n" .
4650               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4651               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4652         if (defined $cd{'rfc2822'}) {
4653                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4654         }
4655
4656         # use per project git URL list in $projectroot/$project/cloneurl
4657         # or make project git URL from git base URL and project name
4658         my $url_tag = "URL";
4659         my @url_list = git_get_project_url_list($project);
4660         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4661         foreach my $git_url (@url_list) {
4662                 next unless $git_url;
4663                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4664                 $url_tag = "";
4665         }
4666
4667         # Tag cloud
4668         my $show_ctags = gitweb_check_feature('ctags');
4669         if ($show_ctags) {
4670                 my $ctags = git_get_project_ctags($project);
4671                 my $cloud = git_populate_project_tagcloud($ctags);
4672                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4673                 print "</td>\n<td>" unless %$ctags;
4674                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4675                 print "</td>\n<td>" if %$ctags;
4676                 print git_show_project_tagcloud($cloud, 48);
4677                 print "</td></tr>";
4678         }
4679
4680         print "</table>\n";
4681
4682         # If XSS prevention is on, we don't include README.html.
4683         # TODO: Allow a readme in some safe format.
4684         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4685                 print "<div class=\"title\">readme</div>\n" .
4686                       "<div class=\"readme\">\n";
4687                 insert_file("$projectroot/$project/README.html");
4688                 print "\n</div>\n"; # class="readme"
4689         }
4690
4691         # we need to request one more than 16 (0..15) to check if
4692         # those 16 are all
4693         my @commitlist = $head ? parse_commits($head, 17) : ();
4694         if (@commitlist) {
4695                 git_print_header_div('shortlog');
4696                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4697                                   $#commitlist <=  15 ? undef :
4698                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4699         }
4700
4701         if (@taglist) {
4702                 git_print_header_div('tags');
4703                 git_tags_body(\@taglist, 0, 15,
4704                               $#taglist <=  15 ? undef :
4705                               $cgi->a({-href => href(action=>"tags")}, "..."));
4706         }
4707
4708         if (@headlist) {
4709                 git_print_header_div('heads');
4710                 git_heads_body(\@headlist, $head, 0, 15,
4711                                $#headlist <= 15 ? undef :
4712                                $cgi->a({-href => href(action=>"heads")}, "..."));
4713         }
4714
4715         if (@forklist) {
4716                 git_print_header_div('forks');
4717                 git_project_list_body(\@forklist, 'age', 0, 15,
4718                                       $#forklist <= 15 ? undef :
4719                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4720                                       'no_header');
4721         }
4722
4723         git_footer_html();
4724 }
4725
4726 sub git_tag {
4727         my $head = git_get_head_hash($project);
4728         git_header_html();
4729         git_print_page_nav('','', $head,undef,$head);
4730         my %tag = parse_tag($hash);
4731
4732         if (! %tag) {
4733                 die_error(404, "Unknown tag object");
4734         }
4735
4736         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4737         print "<div class=\"title_text\">\n" .
4738               "<table class=\"object_header\">\n" .
4739               "<tr>\n" .
4740               "<td>object</td>\n" .
4741               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4742                                $tag{'object'}) . "</td>\n" .
4743               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4744                                               $tag{'type'}) . "</td>\n" .
4745               "</tr>\n";
4746         if (defined($tag{'author'})) {
4747                 git_print_authorship_rows(\%tag, 'author');
4748         }
4749         print "</table>\n\n" .
4750               "</div>\n";
4751         print "<div class=\"page_body\">";
4752         my $comment = $tag{'comment'};
4753         foreach my $line (@$comment) {
4754                 chomp $line;
4755                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4756         }
4757         print "</div>\n";
4758         git_footer_html();
4759 }
4760
4761 sub git_blame {
4762         # permissions
4763         gitweb_check_feature('blame')
4764                 or die_error(403, "Blame view not allowed");
4765
4766         # error checking
4767         die_error(400, "No file name given") unless $file_name;
4768         $hash_base ||= git_get_head_hash($project);
4769         die_error(404, "Couldn't find base commit") unless $hash_base;
4770         my %co = parse_commit($hash_base)
4771                 or die_error(404, "Commit not found");
4772         my $ftype = "blob";
4773         if (!defined $hash) {
4774                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4775                         or die_error(404, "Error looking up file");
4776         } else {
4777                 $ftype = git_get_type($hash);
4778                 if ($ftype !~ "blob") {
4779                         die_error(400, "Object is not a blob");
4780                 }
4781         }
4782
4783         # run git-blame --porcelain
4784         open my $fd, "-|", git_cmd(), "blame", '-p',
4785                 $hash_base, '--', $file_name
4786                 or die_error(500, "Open git-blame failed");
4787
4788         # page header
4789         git_header_html();
4790         my $formats_nav =
4791                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4792                         "blob") .
4793                 " | " .
4794                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4795                         "history") .
4796                 " | " .
4797                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4798                         "HEAD");
4799         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4800         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4801         git_print_page_path($file_name, $ftype, $hash_base);
4802
4803         # page body
4804         my @rev_color = qw(light2 dark2);
4805         my $num_colors = scalar(@rev_color);
4806         my $current_color = 0;
4807         my %metainfo = ();
4808
4809         print <<HTML;
4810 <div class="page_body">
4811 <table class="blame">
4812 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4813 HTML
4814  LINE:
4815         while (my $line = <$fd>) {
4816                 chomp $line;
4817                 # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
4818                 # no <lines in group> for subsequent lines in group of lines
4819                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4820                    ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
4821                 if (!exists $metainfo{$full_rev}) {
4822                         $metainfo{$full_rev} = { 'nprevious' => 0 };
4823                 }
4824                 my $meta = $metainfo{$full_rev};
4825                 my $data;
4826                 while ($data = <$fd>) {
4827                         chomp $data;
4828                         last if ($data =~ s/^\t//); # contents of line
4829                         if ($data =~ /^(\S+)(?: (.*))?$/) {
4830                                 $meta->{$1} = $2 unless exists $meta->{$1};
4831                         }
4832                         if ($data =~ /^previous /) {
4833                                 $meta->{'nprevious'}++;
4834                         }
4835                 }
4836                 my $short_rev = substr($full_rev, 0, 8);
4837                 my $author = $meta->{'author'};
4838                 my %date =
4839                         parse_date($meta->{'author-time'}, $meta->{'author-tz'});
4840                 my $date = $date{'iso-tz'};
4841                 if ($group_size) {
4842                         $current_color = ($current_color + 1) % $num_colors;
4843                 }
4844                 my $tr_class = $rev_color[$current_color];
4845                 $tr_class .= ' boundary' if (exists $meta->{'boundary'});
4846                 $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
4847                 $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
4848                 print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
4849                 if ($group_size) {
4850                         print "<td class=\"sha1\"";
4851                         print " title=\"". esc_html($author) . ", $date\"";
4852                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4853                         print ">";
4854                         print $cgi->a({-href => href(action=>"commit",
4855                                                      hash=>$full_rev,
4856                                                      file_name=>$file_name)},
4857                                       esc_html($short_rev));
4858                         print "</td>\n";
4859                 }
4860                 # 'previous' <sha1 of parent commit> <filename at commit>
4861                 if (exists $meta->{'previous'} &&
4862                     $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
4863                         $meta->{'parent'} = $1;
4864                         $meta->{'file_parent'} = unquote($2);
4865                 }
4866                 my $linenr_commit =
4867                         exists($meta->{'parent'}) ?
4868                         $meta->{'parent'} : $full_rev;
4869                 my $linenr_filename =
4870                         exists($meta->{'file_parent'}) ?
4871                         $meta->{'file_parent'} : unquote($meta->{'filename'});
4872                 my $blamed = href(action => 'blame',
4873                                   file_name => $linenr_filename,
4874                                   hash_base => $linenr_commit);
4875                 print "<td class=\"linenr\">";
4876                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4877                                 -class => "linenr" },
4878                               esc_html($lineno));
4879                 print "</td>";
4880                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4881                 print "</tr>\n";
4882         }
4883         print "</table>\n";
4884         print "</div>";
4885         close $fd
4886                 or print "Reading blob failed\n";
4887
4888         # page footer
4889         git_footer_html();
4890 }
4891
4892 sub git_tags {
4893         my $head = git_get_head_hash($project);
4894         git_header_html();
4895         git_print_page_nav('','', $head,undef,$head);
4896         git_print_header_div('summary', $project);
4897
4898         my @tagslist = git_get_tags_list();
4899         if (@tagslist) {
4900                 git_tags_body(\@tagslist);
4901         }
4902         git_footer_html();
4903 }
4904
4905 sub git_heads {
4906         my $head = git_get_head_hash($project);
4907         git_header_html();
4908         git_print_page_nav('','', $head,undef,$head);
4909         git_print_header_div('summary', $project);
4910
4911         my @headslist = git_get_heads_list();
4912         if (@headslist) {
4913                 git_heads_body(\@headslist, $head);
4914         }
4915         git_footer_html();
4916 }
4917
4918 sub git_blob_plain {
4919         my $type = shift;
4920         my $expires;
4921
4922         if (!defined $hash) {
4923                 if (defined $file_name) {
4924                         my $base = $hash_base || git_get_head_hash($project);
4925                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4926                                 or die_error(404, "Cannot find file");
4927                 } else {
4928                         die_error(400, "No file name defined");
4929                 }
4930         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4931                 # blobs defined by non-textual hash id's can be cached
4932                 $expires = "+1d";
4933         }
4934
4935         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4936                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4937
4938         # content-type (can include charset)
4939         $type = blob_contenttype($fd, $file_name, $type);
4940
4941         # "save as" filename, even when no $file_name is given
4942         my $save_as = "$hash";
4943         if (defined $file_name) {
4944                 $save_as = $file_name;
4945         } elsif ($type =~ m/^text\//) {
4946                 $save_as .= '.txt';
4947         }
4948
4949         # With XSS prevention on, blobs of all types except a few known safe
4950         # ones are served with "Content-Disposition: attachment" to make sure
4951         # they don't run in our security domain.  For certain image types,
4952         # blob view writes an <img> tag referring to blob_plain view, and we
4953         # want to be sure not to break that by serving the image as an
4954         # attachment (though Firefox 3 doesn't seem to care).
4955         my $sandbox = $prevent_xss &&
4956                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
4957
4958         print $cgi->header(
4959                 -type => $type,
4960                 -expires => $expires,
4961                 -content_disposition =>
4962                         ($sandbox ? 'attachment' : 'inline')
4963                         . '; filename="' . $save_as . '"');
4964         local $/ = undef;
4965         binmode STDOUT, ':raw';
4966         print <$fd>;
4967         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4968         close $fd;
4969 }
4970
4971 sub git_blob {
4972         my $expires;
4973
4974         if (!defined $hash) {
4975                 if (defined $file_name) {
4976                         my $base = $hash_base || git_get_head_hash($project);
4977                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4978                                 or die_error(404, "Cannot find file");
4979                 } else {
4980                         die_error(400, "No file name defined");
4981                 }
4982         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4983                 # blobs defined by non-textual hash id's can be cached
4984                 $expires = "+1d";
4985         }
4986
4987         my $have_blame = gitweb_check_feature('blame');
4988         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4989                 or die_error(500, "Couldn't cat $file_name, $hash");
4990         my $mimetype = blob_mimetype($fd, $file_name);
4991         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4992                 close $fd;
4993                 return git_blob_plain($mimetype);
4994         }
4995         # we can have blame only for text/* mimetype
4996         $have_blame &&= ($mimetype =~ m!^text/!);
4997
4998         git_header_html(undef, $expires);
4999         my $formats_nav = '';
5000         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5001                 if (defined $file_name) {
5002                         if ($have_blame) {
5003                                 $formats_nav .=
5004                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5005                                                 "blame") .
5006                                         " | ";
5007                         }
5008                         $formats_nav .=
5009                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5010                                         "history") .
5011                                 " | " .
5012                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5013                                         "raw") .
5014                                 " | " .
5015                                 $cgi->a({-href => href(action=>"blob",
5016                                                        hash_base=>"HEAD", file_name=>$file_name)},
5017                                         "HEAD");
5018                 } else {
5019                         $formats_nav .=
5020                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5021                                         "raw");
5022                 }
5023                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5024                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5025         } else {
5026                 print "<div class=\"page_nav\">\n" .
5027                       "<br/><br/></div>\n" .
5028                       "<div class=\"title\">$hash</div>\n";
5029         }
5030         git_print_page_path($file_name, "blob", $hash_base);
5031         print "<div class=\"page_body\">\n";
5032         if ($mimetype =~ m!^image/!) {
5033                 print qq!<img type="$mimetype"!;
5034                 if ($file_name) {
5035                         print qq! alt="$file_name" title="$file_name"!;
5036                 }
5037                 print qq! src="! .
5038                       href(action=>"blob_plain", hash=>$hash,
5039                            hash_base=>$hash_base, file_name=>$file_name) .
5040                       qq!" />\n!;
5041         } else {
5042                 my $nr;
5043                 while (my $line = <$fd>) {
5044                         chomp $line;
5045                         $nr++;
5046                         $line = untabify($line);
5047                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
5048                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
5049                 }
5050         }
5051         close $fd
5052                 or print "Reading blob failed.\n";
5053         print "</div>";
5054         git_footer_html();
5055 }
5056
5057 sub git_tree {
5058         if (!defined $hash_base) {
5059                 $hash_base = "HEAD";
5060         }
5061         if (!defined $hash) {
5062                 if (defined $file_name) {
5063                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5064                 } else {
5065                         $hash = $hash_base;
5066                 }
5067         }
5068         die_error(404, "No such tree") unless defined($hash);
5069
5070         my @entries = ();
5071         {
5072                 local $/ = "\0";
5073                 open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
5074                         or die_error(500, "Open git-ls-tree failed");
5075                 @entries = map { chomp; $_ } <$fd>;
5076                 close $fd
5077                         or die_error(404, "Reading tree failed");
5078         }
5079
5080         my $refs = git_get_references();
5081         my $ref = format_ref_marker($refs, $hash_base);
5082         git_header_html();
5083         my $basedir = '';
5084         my $have_blame = gitweb_check_feature('blame');
5085         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5086                 my @views_nav = ();
5087                 if (defined $file_name) {
5088                         push @views_nav,
5089                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5090                                         "history"),
5091                                 $cgi->a({-href => href(action=>"tree",
5092                                                        hash_base=>"HEAD", file_name=>$file_name)},
5093                                         "HEAD"),
5094                 }
5095                 my $snapshot_links = format_snapshot_links($hash);
5096                 if (defined $snapshot_links) {
5097                         # FIXME: Should be available when we have no hash base as well.
5098                         push @views_nav, $snapshot_links;
5099                 }
5100                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
5101                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5102         } else {
5103                 undef $hash_base;
5104                 print "<div class=\"page_nav\">\n";
5105                 print "<br/><br/></div>\n";
5106                 print "<div class=\"title\">$hash</div>\n";
5107         }
5108         if (defined $file_name) {
5109                 $basedir = $file_name;
5110                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5111                         $basedir .= '/';
5112                 }
5113                 git_print_page_path($file_name, 'tree', $hash_base);
5114         }
5115         print "<div class=\"page_body\">\n";
5116         print "<table class=\"tree\">\n";
5117         my $alternate = 1;
5118         # '..' (top directory) link if possible
5119         if (defined $hash_base &&
5120             defined $file_name && $file_name =~ m![^/]+$!) {
5121                 if ($alternate) {
5122                         print "<tr class=\"dark\">\n";
5123                 } else {
5124                         print "<tr class=\"light\">\n";
5125                 }
5126                 $alternate ^= 1;
5127
5128                 my $up = $file_name;
5129                 $up =~ s!/?[^/]+$!!;
5130                 undef $up unless $up;
5131                 # based on git_print_tree_entry
5132                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5133                 print '<td class="list">';
5134                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
5135                                              file_name=>$up)},
5136                               "..");
5137                 print "</td>\n";
5138                 print "<td class=\"link\"></td>\n";
5139
5140                 print "</tr>\n";
5141         }
5142         foreach my $line (@entries) {
5143                 my %t = parse_ls_tree_line($line, -z => 1);
5144
5145                 if ($alternate) {
5146                         print "<tr class=\"dark\">\n";
5147                 } else {
5148                         print "<tr class=\"light\">\n";
5149                 }
5150                 $alternate ^= 1;
5151
5152                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5153
5154                 print "</tr>\n";
5155         }
5156         print "</table>\n" .
5157               "</div>";
5158         git_footer_html();
5159 }
5160
5161 sub git_snapshot {
5162         my $format = $input_params{'snapshot_format'};
5163         if (!@snapshot_fmts) {
5164                 die_error(403, "Snapshots not allowed");
5165         }
5166         # default to first supported snapshot format
5167         $format ||= $snapshot_fmts[0];
5168         if ($format !~ m/^[a-z0-9]+$/) {
5169                 die_error(400, "Invalid snapshot format parameter");
5170         } elsif (!exists($known_snapshot_formats{$format})) {
5171                 die_error(400, "Unknown snapshot format");
5172         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5173                 die_error(403, "Unsupported snapshot format");
5174         }
5175
5176         if (!defined $hash) {
5177                 $hash = git_get_head_hash($project);
5178         }
5179
5180         my $name = $project;
5181         $name =~ s,([^/])/*\.git$,$1,;
5182         $name = basename($name);
5183         my $filename = to_utf8($name);
5184         $name =~ s/\047/\047\\\047\047/g;
5185         my $cmd;
5186         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
5187         $cmd = quote_command(
5188                 git_cmd(), 'archive',
5189                 "--format=$known_snapshot_formats{$format}{'format'}",
5190                 "--prefix=$name/", $hash);
5191         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5192                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5193         }
5194
5195         print $cgi->header(
5196                 -type => $known_snapshot_formats{$format}{'type'},
5197                 -content_disposition => 'inline; filename="' . "$filename" . '"',
5198                 -status => '200 OK');
5199
5200         open my $fd, "-|", $cmd
5201                 or die_error(500, "Execute git-archive failed");
5202         binmode STDOUT, ':raw';
5203         print <$fd>;
5204         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5205         close $fd;
5206 }
5207
5208 sub git_log {
5209         my $head = git_get_head_hash($project);
5210         if (!defined $hash) {
5211                 $hash = $head;
5212         }
5213         if (!defined $page) {
5214                 $page = 0;
5215         }
5216         my $refs = git_get_references();
5217
5218         my @commitlist = parse_commits($hash, 101, (100 * $page));
5219
5220         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
5221
5222         my ($patch_max) = gitweb_get_feature('patches');
5223         if ($patch_max) {
5224                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5225                         $paging_nav .= " &sdot; " .
5226                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5227                                         "patches");
5228                 }
5229         }
5230
5231         git_header_html();
5232         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5233
5234         if (!@commitlist) {
5235                 my %co = parse_commit($hash);
5236
5237                 git_print_header_div('summary', $project);
5238                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5239         }
5240         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5241         for (my $i = 0; $i <= $to; $i++) {
5242                 my %co = %{$commitlist[$i]};
5243                 next if !%co;
5244                 my $commit = $co{'id'};
5245                 my $ref = format_ref_marker($refs, $commit);
5246                 my %ad = parse_date($co{'author_epoch'});
5247                 git_print_header_div('commit',
5248                                "<span class=\"age\">$co{'age_string'}</span>" .
5249                                esc_html($co{'title'}) . $ref,
5250                                $commit);
5251                 print "<div class=\"title_text\">\n" .
5252                       "<div class=\"log_link\">\n" .
5253                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5254                       " | " .
5255                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5256                       " | " .
5257                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5258                       "<br/>\n" .
5259                       "</div>\n";
5260                       git_print_authorship(\%co, -tag => 'span');
5261                       print "<br/>\n</div>\n";
5262
5263                 print "<div class=\"log_body\">\n";
5264                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5265                 print "</div>\n";
5266         }
5267         if ($#commitlist >= 100) {
5268                 print "<div class=\"page_nav\">\n";
5269                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5270                                -accesskey => "n", -title => "Alt-n"}, "next");
5271                 print "</div>\n";
5272         }
5273         git_footer_html();
5274 }
5275
5276 sub git_commit {
5277         $hash ||= $hash_base || "HEAD";
5278         my %co = parse_commit($hash)
5279             or die_error(404, "Unknown commit object");
5280
5281         my $parent  = $co{'parent'};
5282         my $parents = $co{'parents'}; # listref
5283
5284         # we need to prepare $formats_nav before any parameter munging
5285         my $formats_nav;
5286         if (!defined $parent) {
5287                 # --root commitdiff
5288                 $formats_nav .= '(initial)';
5289         } elsif (@$parents == 1) {
5290                 # single parent commit
5291                 $formats_nav .=
5292                         '(parent: ' .
5293                         $cgi->a({-href => href(action=>"commit",
5294                                                hash=>$parent)},
5295                                 esc_html(substr($parent, 0, 7))) .
5296                         ')';
5297         } else {
5298                 # merge commit
5299                 $formats_nav .=
5300                         '(merge: ' .
5301                         join(' ', map {
5302                                 $cgi->a({-href => href(action=>"commit",
5303                                                        hash=>$_)},
5304                                         esc_html(substr($_, 0, 7)));
5305                         } @$parents ) .
5306                         ')';
5307         }
5308         if (gitweb_check_feature('patches')) {
5309                 $formats_nav .= " | " .
5310                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5311                                 "patch");
5312         }
5313
5314         if (!defined $parent) {
5315                 $parent = "--root";
5316         }
5317         my @difftree;
5318         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5319                 @diff_opts,
5320                 (@$parents <= 1 ? $parent : '-c'),
5321                 $hash, "--"
5322                 or die_error(500, "Open git-diff-tree failed");
5323         @difftree = map { chomp; $_ } <$fd>;
5324         close $fd or die_error(404, "Reading git-diff-tree failed");
5325
5326         # non-textual hash id's can be cached
5327         my $expires;
5328         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5329                 $expires = "+1d";
5330         }
5331         my $refs = git_get_references();
5332         my $ref = format_ref_marker($refs, $co{'id'});
5333
5334         git_header_html(undef, $expires);
5335         git_print_page_nav('commit', '',
5336                            $hash, $co{'tree'}, $hash,
5337                            $formats_nav);
5338
5339         if (defined $co{'parent'}) {
5340                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5341         } else {
5342                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5343         }
5344         print "<div class=\"title_text\">\n" .
5345               "<table class=\"object_header\">\n";
5346         git_print_authorship_rows(\%co);
5347         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5348         print "<tr>" .
5349               "<td>tree</td>" .
5350               "<td class=\"sha1\">" .
5351               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5352                        class => "list"}, $co{'tree'}) .
5353               "</td>" .
5354               "<td class=\"link\">" .
5355               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5356                       "tree");
5357         my $snapshot_links = format_snapshot_links($hash);
5358         if (defined $snapshot_links) {
5359                 print " | " . $snapshot_links;
5360         }
5361         print "</td>" .
5362               "</tr>\n";
5363
5364         foreach my $par (@$parents) {
5365                 print "<tr>" .
5366                       "<td>parent</td>" .
5367                       "<td class=\"sha1\">" .
5368                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5369                                class => "list"}, $par) .
5370                       "</td>" .
5371                       "<td class=\"link\">" .
5372                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5373                       " | " .
5374                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5375                       "</td>" .
5376                       "</tr>\n";
5377         }
5378         print "</table>".
5379               "</div>\n";
5380
5381         print "<div class=\"page_body\">\n";
5382         git_print_log($co{'comment'});
5383         print "</div>\n";
5384
5385         git_difftree_body(\@difftree, $hash, @$parents);
5386
5387         git_footer_html();
5388 }
5389
5390 sub git_object {
5391         # object is defined by:
5392         # - hash or hash_base alone
5393         # - hash_base and file_name
5394         my $type;
5395
5396         # - hash or hash_base alone
5397         if ($hash || ($hash_base && !defined $file_name)) {
5398                 my $object_id = $hash || $hash_base;
5399
5400                 open my $fd, "-|", quote_command(
5401                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5402                         or die_error(404, "Object does not exist");
5403                 $type = <$fd>;
5404                 chomp $type;
5405                 close $fd
5406                         or die_error(404, "Object does not exist");
5407
5408         # - hash_base and file_name
5409         } elsif ($hash_base && defined $file_name) {
5410                 $file_name =~ s,/+$,,;
5411
5412                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5413                         or die_error(404, "Base object does not exist");
5414
5415                 # here errors should not hapen
5416                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5417                         or die_error(500, "Open git-ls-tree failed");
5418                 my $line = <$fd>;
5419                 close $fd;
5420
5421                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5422                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5423                         die_error(404, "File or directory for given base does not exist");
5424                 }
5425                 $type = $2;
5426                 $hash = $3;
5427         } else {
5428                 die_error(400, "Not enough information to find object");
5429         }
5430
5431         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5432                                           hash=>$hash, hash_base=>$hash_base,
5433                                           file_name=>$file_name),
5434                              -status => '302 Found');
5435 }
5436
5437 sub git_blobdiff {
5438         my $format = shift || 'html';
5439
5440         my $fd;
5441         my @difftree;
5442         my %diffinfo;
5443         my $expires;
5444
5445         # preparing $fd and %diffinfo for git_patchset_body
5446         # new style URI
5447         if (defined $hash_base && defined $hash_parent_base) {
5448                 if (defined $file_name) {
5449                         # read raw output
5450                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5451                                 $hash_parent_base, $hash_base,
5452                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5453                                 or die_error(500, "Open git-diff-tree failed");
5454                         @difftree = map { chomp; $_ } <$fd>;
5455                         close $fd
5456                                 or die_error(404, "Reading git-diff-tree failed");
5457                         @difftree
5458                                 or die_error(404, "Blob diff not found");
5459
5460                 } elsif (defined $hash &&
5461                          $hash =~ /[0-9a-fA-F]{40}/) {
5462                         # try to find filename from $hash
5463
5464                         # read filtered raw output
5465                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5466                                 $hash_parent_base, $hash_base, "--"
5467                                 or die_error(500, "Open git-diff-tree failed");
5468                         @difftree =
5469                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5470                                 # $hash == to_id
5471                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5472                                 map { chomp; $_ } <$fd>;
5473                         close $fd
5474                                 or die_error(404, "Reading git-diff-tree failed");
5475                         @difftree
5476                                 or die_error(404, "Blob diff not found");
5477
5478                 } else {
5479                         die_error(400, "Missing one of the blob diff parameters");
5480                 }
5481
5482                 if (@difftree > 1) {
5483                         die_error(400, "Ambiguous blob diff specification");
5484                 }
5485
5486                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5487                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5488                 $file_name   ||= $diffinfo{'to_file'};
5489
5490                 $hash_parent ||= $diffinfo{'from_id'};
5491                 $hash        ||= $diffinfo{'to_id'};
5492
5493                 # non-textual hash id's can be cached
5494                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5495                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5496                         $expires = '+1d';
5497                 }
5498
5499                 # open patch output
5500                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5501                         '-p', ($format eq 'html' ? "--full-index" : ()),
5502                         $hash_parent_base, $hash_base,
5503                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5504                         or die_error(500, "Open git-diff-tree failed");
5505         }
5506
5507         # old/legacy style URI -- not generated anymore since 1.4.3.
5508         if (!%diffinfo) {
5509                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5510         }
5511
5512         # header
5513         if ($format eq 'html') {
5514                 my $formats_nav =
5515                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5516                                 "raw");
5517                 git_header_html(undef, $expires);
5518                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5519                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5520                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5521                 } else {
5522                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5523                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5524                 }
5525                 if (defined $file_name) {
5526                         git_print_page_path($file_name, "blob", $hash_base);
5527                 } else {
5528                         print "<div class=\"page_path\"></div>\n";
5529                 }
5530
5531         } elsif ($format eq 'plain') {
5532                 print $cgi->header(
5533                         -type => 'text/plain',
5534                         -charset => 'utf-8',
5535                         -expires => $expires,
5536                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5537
5538                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5539
5540         } else {
5541                 die_error(400, "Unknown blobdiff format");
5542         }
5543
5544         # patch
5545         if ($format eq 'html') {
5546                 print "<div class=\"page_body\">\n";
5547
5548                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5549                 close $fd;
5550
5551                 print "</div>\n"; # class="page_body"
5552                 git_footer_html();
5553
5554         } else {
5555                 while (my $line = <$fd>) {
5556                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5557                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5558
5559                         print $line;
5560
5561                         last if $line =~ m!^\+\+\+!;
5562                 }
5563                 local $/ = undef;
5564                 print <$fd>;
5565                 close $fd;
5566         }
5567 }
5568
5569 sub git_blobdiff_plain {
5570         git_blobdiff('plain');
5571 }
5572
5573 sub git_commitdiff {
5574         my %params = @_;
5575         my $format = $params{-format} || 'html';
5576
5577         my ($patch_max) = gitweb_get_feature('patches');
5578         if ($format eq 'patch') {
5579                 die_error(403, "Patch view not allowed") unless $patch_max;
5580         }
5581
5582         $hash ||= $hash_base || "HEAD";
5583         my %co = parse_commit($hash)
5584             or die_error(404, "Unknown commit object");
5585
5586         # choose format for commitdiff for merge
5587         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5588                 $hash_parent = '--cc';
5589         }
5590         # we need to prepare $formats_nav before almost any parameter munging
5591         my $formats_nav;
5592         if ($format eq 'html') {
5593                 $formats_nav =
5594                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5595                                 "raw");
5596                 if ($patch_max) {
5597                         $formats_nav .= " | " .
5598                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5599                                         "patch");
5600                 }
5601
5602                 if (defined $hash_parent &&
5603                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5604                         # commitdiff with two commits given
5605                         my $hash_parent_short = $hash_parent;
5606                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5607                                 $hash_parent_short = substr($hash_parent, 0, 7);
5608                         }
5609                         $formats_nav .=
5610                                 ' (from';
5611                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5612                                 if ($co{'parents'}[$i] eq $hash_parent) {
5613                                         $formats_nav .= ' parent ' . ($i+1);
5614                                         last;
5615                                 }
5616                         }
5617                         $formats_nav .= ': ' .
5618                                 $cgi->a({-href => href(action=>"commitdiff",
5619                                                        hash=>$hash_parent)},
5620                                         esc_html($hash_parent_short)) .
5621                                 ')';
5622                 } elsif (!$co{'parent'}) {
5623                         # --root commitdiff
5624                         $formats_nav .= ' (initial)';
5625                 } elsif (scalar @{$co{'parents'}} == 1) {
5626                         # single parent commit
5627                         $formats_nav .=
5628                                 ' (parent: ' .
5629                                 $cgi->a({-href => href(action=>"commitdiff",
5630                                                        hash=>$co{'parent'})},
5631                                         esc_html(substr($co{'parent'}, 0, 7))) .
5632                                 ')';
5633                 } else {
5634                         # merge commit
5635                         if ($hash_parent eq '--cc') {
5636                                 $formats_nav .= ' | ' .
5637                                         $cgi->a({-href => href(action=>"commitdiff",
5638                                                                hash=>$hash, hash_parent=>'-c')},
5639                                                 'combined');
5640                         } else { # $hash_parent eq '-c'
5641                                 $formats_nav .= ' | ' .
5642                                         $cgi->a({-href => href(action=>"commitdiff",
5643                                                                hash=>$hash, hash_parent=>'--cc')},
5644                                                 'compact');
5645                         }
5646                         $formats_nav .=
5647                                 ' (merge: ' .
5648                                 join(' ', map {
5649                                         $cgi->a({-href => href(action=>"commitdiff",
5650                                                                hash=>$_)},
5651                                                 esc_html(substr($_, 0, 7)));
5652                                 } @{$co{'parents'}} ) .
5653                                 ')';
5654                 }
5655         }
5656
5657         my $hash_parent_param = $hash_parent;
5658         if (!defined $hash_parent_param) {
5659                 # --cc for multiple parents, --root for parentless
5660                 $hash_parent_param =
5661                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5662         }
5663
5664         # read commitdiff
5665         my $fd;
5666         my @difftree;
5667         if ($format eq 'html') {
5668                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5669                         "--no-commit-id", "--patch-with-raw", "--full-index",
5670                         $hash_parent_param, $hash, "--"
5671                         or die_error(500, "Open git-diff-tree failed");
5672
5673                 while (my $line = <$fd>) {
5674                         chomp $line;
5675                         # empty line ends raw part of diff-tree output
5676                         last unless $line;
5677                         push @difftree, scalar parse_difftree_raw_line($line);
5678                 }
5679
5680         } elsif ($format eq 'plain') {
5681                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5682                         '-p', $hash_parent_param, $hash, "--"
5683                         or die_error(500, "Open git-diff-tree failed");
5684         } elsif ($format eq 'patch') {
5685                 # For commit ranges, we limit the output to the number of
5686                 # patches specified in the 'patches' feature.
5687                 # For single commits, we limit the output to a single patch,
5688                 # diverging from the git-format-patch default.
5689                 my @commit_spec = ();
5690                 if ($hash_parent) {
5691                         if ($patch_max > 0) {
5692                                 push @commit_spec, "-$patch_max";
5693                         }
5694                         push @commit_spec, '-n', "$hash_parent..$hash";
5695                 } else {
5696                         if ($params{-single}) {
5697                                 push @commit_spec, '-1';
5698                         } else {
5699                                 if ($patch_max > 0) {
5700                                         push @commit_spec, "-$patch_max";
5701                                 }
5702                                 push @commit_spec, "-n";
5703                         }
5704                         push @commit_spec, '--root', $hash;
5705                 }
5706                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5707                         '--stdout', @commit_spec
5708                         or die_error(500, "Open git-format-patch failed");
5709         } else {
5710                 die_error(400, "Unknown commitdiff format");
5711         }
5712
5713         # non-textual hash id's can be cached
5714         my $expires;
5715         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5716                 $expires = "+1d";
5717         }
5718
5719         # write commit message
5720         if ($format eq 'html') {
5721                 my $refs = git_get_references();
5722                 my $ref = format_ref_marker($refs, $co{'id'});
5723
5724                 git_header_html(undef, $expires);
5725                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5726                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5727                 print "<div class=\"title_text\">\n" .
5728                       "<table class=\"object_header\">\n";
5729                 git_print_authorship_rows(\%co);
5730                 print "</table>".
5731                       "</div>\n";
5732                 print "<div class=\"page_body\">\n";
5733                 if (@{$co{'comment'}} > 1) {
5734                         print "<div class=\"log\">\n";
5735                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5736                         print "</div>\n"; # class="log"
5737                 }
5738
5739         } elsif ($format eq 'plain') {
5740                 my $refs = git_get_references("tags");
5741                 my $tagname = git_get_rev_name_tags($hash);
5742                 my $filename = basename($project) . "-$hash.patch";
5743
5744                 print $cgi->header(
5745                         -type => 'text/plain',
5746                         -charset => 'utf-8',
5747                         -expires => $expires,
5748                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5749                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5750                 print "From: " . to_utf8($co{'author'}) . "\n";
5751                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5752                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5753
5754                 print "X-Git-Tag: $tagname\n" if $tagname;
5755                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5756
5757                 foreach my $line (@{$co{'comment'}}) {
5758                         print to_utf8($line) . "\n";
5759                 }
5760                 print "---\n\n";
5761         } elsif ($format eq 'patch') {
5762                 my $filename = basename($project) . "-$hash.patch";
5763
5764                 print $cgi->header(
5765                         -type => 'text/plain',
5766                         -charset => 'utf-8',
5767                         -expires => $expires,
5768                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5769         }
5770
5771         # write patch
5772         if ($format eq 'html') {
5773                 my $use_parents = !defined $hash_parent ||
5774                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5775                 git_difftree_body(\@difftree, $hash,
5776                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5777                 print "<br/>\n";
5778
5779                 git_patchset_body($fd, \@difftree, $hash,
5780                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5781                 close $fd;
5782                 print "</div>\n"; # class="page_body"
5783                 git_footer_html();
5784
5785         } elsif ($format eq 'plain') {
5786                 local $/ = undef;
5787                 print <$fd>;
5788                 close $fd
5789                         or print "Reading git-diff-tree failed\n";
5790         } elsif ($format eq 'patch') {
5791                 local $/ = undef;
5792                 print <$fd>;
5793                 close $fd
5794                         or print "Reading git-format-patch failed\n";
5795         }
5796 }
5797
5798 sub git_commitdiff_plain {
5799         git_commitdiff(-format => 'plain');
5800 }
5801
5802 # format-patch-style patches
5803 sub git_patch {
5804         git_commitdiff(-format => 'patch', -single=> 1);
5805 }
5806
5807 sub git_patches {
5808         git_commitdiff(-format => 'patch');
5809 }
5810
5811 sub git_history {
5812         if (!defined $hash_base) {
5813                 $hash_base = git_get_head_hash($project);
5814         }
5815         if (!defined $page) {
5816                 $page = 0;
5817         }
5818         my $ftype;
5819         my %co = parse_commit($hash_base)
5820             or die_error(404, "Unknown commit object");
5821
5822         my $refs = git_get_references();
5823         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5824
5825         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5826                                        $file_name, "--full-history")
5827             or die_error(404, "No such file or directory on given branch");
5828
5829         if (!defined $hash && defined $file_name) {
5830                 # some commits could have deleted file in question,
5831                 # and not have it in tree, but one of them has to have it
5832                 for (my $i = 0; $i <= @commitlist; $i++) {
5833                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5834                         last if defined $hash;
5835                 }
5836         }
5837         if (defined $hash) {
5838                 $ftype = git_get_type($hash);
5839         }
5840         if (!defined $ftype) {
5841                 die_error(500, "Unknown type of object");
5842         }
5843
5844         my $paging_nav = '';
5845         if ($page > 0) {
5846                 $paging_nav .=
5847                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5848                                                file_name=>$file_name)},
5849                                 "first");
5850                 $paging_nav .= " &sdot; " .
5851                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5852                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5853         } else {
5854                 $paging_nav .= "first";
5855                 $paging_nav .= " &sdot; prev";
5856         }
5857         my $next_link = '';
5858         if ($#commitlist >= 100) {
5859                 $next_link =
5860                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5861                                  -accesskey => "n", -title => "Alt-n"}, "next");
5862                 $paging_nav .= " &sdot; $next_link";
5863         } else {
5864                 $paging_nav .= " &sdot; next";
5865         }
5866
5867         git_header_html();
5868         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5869         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5870         git_print_page_path($file_name, $ftype, $hash_base);
5871
5872         git_history_body(\@commitlist, 0, 99,
5873                          $refs, $hash_base, $ftype, $next_link);
5874
5875         git_footer_html();
5876 }
5877
5878 sub git_search {
5879         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5880         if (!defined $searchtext) {
5881                 die_error(400, "Text field is empty");
5882         }
5883         if (!defined $hash) {
5884                 $hash = git_get_head_hash($project);
5885         }
5886         my %co = parse_commit($hash);
5887         if (!%co) {
5888                 die_error(404, "Unknown commit object");
5889         }
5890         if (!defined $page) {
5891                 $page = 0;
5892         }
5893
5894         $searchtype ||= 'commit';
5895         if ($searchtype eq 'pickaxe') {
5896                 # pickaxe may take all resources of your box and run for several minutes
5897                 # with every query - so decide by yourself how public you make this feature
5898                 gitweb_check_feature('pickaxe')
5899                     or die_error(403, "Pickaxe is disabled");
5900         }
5901         if ($searchtype eq 'grep') {
5902                 gitweb_check_feature('grep')
5903                     or die_error(403, "Grep is disabled");
5904         }
5905
5906         git_header_html();
5907
5908         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5909                 my $greptype;
5910                 if ($searchtype eq 'commit') {
5911                         $greptype = "--grep=";
5912                 } elsif ($searchtype eq 'author') {
5913                         $greptype = "--author=";
5914                 } elsif ($searchtype eq 'committer') {
5915                         $greptype = "--committer=";
5916                 }
5917                 $greptype .= $searchtext;
5918                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5919                                                $greptype, '--regexp-ignore-case',
5920                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5921
5922                 my $paging_nav = '';
5923                 if ($page > 0) {
5924                         $paging_nav .=
5925                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5926                                                        searchtext=>$searchtext,
5927                                                        searchtype=>$searchtype)},
5928                                         "first");
5929                         $paging_nav .= " &sdot; " .
5930                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5931                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5932                 } else {
5933                         $paging_nav .= "first";
5934                         $paging_nav .= " &sdot; prev";
5935                 }
5936                 my $next_link = '';
5937                 if ($#commitlist >= 100) {
5938                         $next_link =
5939                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5940                                          -accesskey => "n", -title => "Alt-n"}, "next");
5941                         $paging_nav .= " &sdot; $next_link";
5942                 } else {
5943                         $paging_nav .= " &sdot; next";
5944                 }
5945
5946                 if ($#commitlist >= 100) {
5947                 }
5948
5949                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5950                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5951                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5952         }
5953
5954         if ($searchtype eq 'pickaxe') {
5955                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5956                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5957
5958                 print "<table class=\"pickaxe search\">\n";
5959                 my $alternate = 1;
5960                 local $/ = "\n";
5961                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5962                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5963                         ($search_use_regexp ? '--pickaxe-regex' : ());
5964                 undef %co;
5965                 my @files;
5966                 while (my $line = <$fd>) {
5967                         chomp $line;
5968                         next unless $line;
5969
5970                         my %set = parse_difftree_raw_line($line);
5971                         if (defined $set{'commit'}) {
5972                                 # finish previous commit
5973                                 if (%co) {
5974                                         print "</td>\n" .
5975                                               "<td class=\"link\">" .
5976                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5977                                               " | " .
5978                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5979                                         print "</td>\n" .
5980                                               "</tr>\n";
5981                                 }
5982
5983                                 if ($alternate) {
5984                                         print "<tr class=\"dark\">\n";
5985                                 } else {
5986                                         print "<tr class=\"light\">\n";
5987                                 }
5988                                 $alternate ^= 1;
5989                                 %co = parse_commit($set{'commit'});
5990                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5991                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5992                                       "<td><i>$author</i></td>\n" .
5993                                       "<td>" .
5994                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5995                                               -class => "list subject"},
5996                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5997                         } elsif (defined $set{'to_id'}) {
5998                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5999
6000                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6001                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6002                                               -class => "list"},
6003                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6004                                       "<br/>\n";
6005                         }
6006                 }
6007                 close $fd;
6008
6009                 # finish last commit (warning: repetition!)
6010                 if (%co) {
6011                         print "</td>\n" .
6012                               "<td class=\"link\">" .
6013                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6014                               " | " .
6015                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6016                         print "</td>\n" .
6017                               "</tr>\n";
6018                 }
6019
6020                 print "</table>\n";
6021         }
6022
6023         if ($searchtype eq 'grep') {
6024                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6025                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6026
6027                 print "<table class=\"grep_search\">\n";
6028                 my $alternate = 1;
6029                 my $matches = 0;
6030                 local $/ = "\n";
6031                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6032                         $search_use_regexp ? ('-E', '-i') : '-F',
6033                         $searchtext, $co{'tree'};
6034                 my $lastfile = '';
6035                 while (my $line = <$fd>) {
6036                         chomp $line;
6037                         my ($file, $lno, $ltext, $binary);
6038                         last if ($matches++ > 1000);
6039                         if ($line =~ /^Binary file (.+) matches$/) {
6040                                 $file = $1;
6041                                 $binary = 1;
6042                         } else {
6043                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6044                         }
6045                         if ($file ne $lastfile) {
6046                                 $lastfile and print "</td></tr>\n";
6047                                 if ($alternate++) {
6048                                         print "<tr class=\"dark\">\n";
6049                                 } else {
6050                                         print "<tr class=\"light\">\n";
6051                                 }
6052                                 print "<td class=\"list\">".
6053                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6054                                                                file_name=>"$file"),
6055                                                 -class => "list"}, esc_path($file));
6056                                 print "</td><td>\n";
6057                                 $lastfile = $file;
6058                         }
6059                         if ($binary) {
6060                                 print "<div class=\"binary\">Binary file</div>\n";
6061                         } else {
6062                                 $ltext = untabify($ltext);
6063                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6064                                         $ltext = esc_html($1, -nbsp=>1);
6065                                         $ltext .= '<span class="match">';
6066                                         $ltext .= esc_html($2, -nbsp=>1);
6067                                         $ltext .= '</span>';
6068                                         $ltext .= esc_html($3, -nbsp=>1);
6069                                 } else {
6070                                         $ltext = esc_html($ltext, -nbsp=>1);
6071                                 }
6072                                 print "<div class=\"pre\">" .
6073                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6074                                                                file_name=>"$file").'#l'.$lno,
6075                                                 -class => "linenr"}, sprintf('%4i', $lno))
6076                                         . ' ' .  $ltext . "</div>\n";
6077                         }
6078                 }
6079                 if ($lastfile) {
6080                         print "</td></tr>\n";
6081                         if ($matches > 1000) {
6082                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6083                         }
6084                 } else {
6085                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6086                 }
6087                 close $fd;
6088
6089                 print "</table>\n";
6090         }
6091         git_footer_html();
6092 }
6093
6094 sub git_search_help {
6095         git_header_html();
6096         git_print_page_nav('','', $hash,$hash,$hash);
6097         print <<EOT;
6098 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6099 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6100 the pattern entered is recognized as the POSIX extended
6101 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6102 insensitive).</p>
6103 <dl>
6104 <dt><b>commit</b></dt>
6105 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6106 EOT
6107         my $have_grep = gitweb_check_feature('grep');
6108         if ($have_grep) {
6109                 print <<EOT;
6110 <dt><b>grep</b></dt>
6111 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6112     a different one) are searched for the given pattern. On large trees, this search can take
6113 a while and put some strain on the server, so please use it with some consideration. Note that
6114 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6115 case-sensitive.</dd>
6116 EOT
6117         }
6118         print <<EOT;
6119 <dt><b>author</b></dt>
6120 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6121 <dt><b>committer</b></dt>
6122 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6123 EOT
6124         my $have_pickaxe = gitweb_check_feature('pickaxe');
6125         if ($have_pickaxe) {
6126                 print <<EOT;
6127 <dt><b>pickaxe</b></dt>
6128 <dd>All commits that caused the string to appear or disappear from any file (changes that
6129 added, removed or "modified" the string) will be listed. This search can take a while and
6130 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6131 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6132 EOT
6133         }
6134         print "</dl>\n";
6135         git_footer_html();
6136 }
6137
6138 sub git_shortlog {
6139         my $head = git_get_head_hash($project);
6140         if (!defined $hash) {
6141                 $hash = $head;
6142         }
6143         if (!defined $page) {
6144                 $page = 0;
6145         }
6146         my $refs = git_get_references();
6147
6148         my $commit_hash = $hash;
6149         if (defined $hash_parent) {
6150                 $commit_hash = "$hash_parent..$hash";
6151         }
6152         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
6153
6154         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
6155         my $next_link = '';
6156         if ($#commitlist >= 100) {
6157                 $next_link =
6158                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6159                                  -accesskey => "n", -title => "Alt-n"}, "next");
6160         }
6161         my $patch_max = gitweb_check_feature('patches');
6162         if ($patch_max) {
6163                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6164                         $paging_nav .= " &sdot; " .
6165                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6166                                         "patches");
6167                 }
6168         }
6169
6170         git_header_html();
6171         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
6172         git_print_header_div('summary', $project);
6173
6174         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
6175
6176         git_footer_html();
6177 }
6178
6179 ## ......................................................................
6180 ## feeds (RSS, Atom; OPML)
6181
6182 sub git_feed {
6183         my $format = shift || 'atom';
6184         my $have_blame = gitweb_check_feature('blame');
6185
6186         # Atom: http://www.atomenabled.org/developers/syndication/
6187         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6188         if ($format ne 'rss' && $format ne 'atom') {
6189                 die_error(400, "Unknown web feed format");
6190         }
6191
6192         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6193         my $head = $hash || 'HEAD';
6194         my @commitlist = parse_commits($head, 150, 0, $file_name);
6195
6196         my %latest_commit;
6197         my %latest_date;
6198         my $content_type = "application/$format+xml";
6199         if (defined $cgi->http('HTTP_ACCEPT') &&
6200                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6201                 # browser (feed reader) prefers text/xml
6202                 $content_type = 'text/xml';
6203         }
6204         if (defined($commitlist[0])) {
6205                 %latest_commit = %{$commitlist[0]};
6206                 my $latest_epoch = $latest_commit{'committer_epoch'};
6207                 %latest_date   = parse_date($latest_epoch);
6208                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6209                 if (defined $if_modified) {
6210                         my $since;
6211                         if (eval { require HTTP::Date; 1; }) {
6212                                 $since = HTTP::Date::str2time($if_modified);
6213                         } elsif (eval { require Time::ParseDate; 1; }) {
6214                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6215                         }
6216                         if (defined $since && $latest_epoch <= $since) {
6217                                 print $cgi->header(
6218                                         -type => $content_type,
6219                                         -charset => 'utf-8',
6220                                         -last_modified => $latest_date{'rfc2822'},
6221                                         -status => '304 Not Modified');
6222                                 return;
6223                         }
6224                 }
6225                 print $cgi->header(
6226                         -type => $content_type,
6227                         -charset => 'utf-8',
6228                         -last_modified => $latest_date{'rfc2822'});
6229         } else {
6230                 print $cgi->header(
6231                         -type => $content_type,
6232                         -charset => 'utf-8');
6233         }
6234
6235         # Optimization: skip generating the body if client asks only
6236         # for Last-Modified date.
6237         return if ($cgi->request_method() eq 'HEAD');
6238
6239         # header variables
6240         my $title = "$site_name - $project/$action";
6241         my $feed_type = 'log';
6242         if (defined $hash) {
6243                 $title .= " - '$hash'";
6244                 $feed_type = 'branch log';
6245                 if (defined $file_name) {
6246                         $title .= " :: $file_name";
6247                         $feed_type = 'history';
6248                 }
6249         } elsif (defined $file_name) {
6250                 $title .= " - $file_name";
6251                 $feed_type = 'history';
6252         }
6253         $title .= " $feed_type";
6254         my $descr = git_get_project_description($project);
6255         if (defined $descr) {
6256                 $descr = esc_html($descr);
6257         } else {
6258                 $descr = "$project " .
6259                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6260                          " feed";
6261         }
6262         my $owner = git_get_project_owner($project);
6263         $owner = esc_html($owner);
6264
6265         #header
6266         my $alt_url;
6267         if (defined $file_name) {
6268                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6269         } elsif (defined $hash) {
6270                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6271         } else {
6272                 $alt_url = href(-full=>1, action=>"summary");
6273         }
6274         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6275         if ($format eq 'rss') {
6276                 print <<XML;
6277 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6278 <channel>
6279 XML
6280                 print "<title>$title</title>\n" .
6281                       "<link>$alt_url</link>\n" .
6282                       "<description>$descr</description>\n" .
6283                       "<language>en</language>\n" .
6284                       # project owner is responsible for 'editorial' content
6285                       "<managingEditor>$owner</managingEditor>\n";
6286                 if (defined $logo || defined $favicon) {
6287                         # prefer the logo to the favicon, since RSS
6288                         # doesn't allow both
6289                         my $img = esc_url($logo || $favicon);
6290                         print "<image>\n" .
6291                               "<url>$img</url>\n" .
6292                               "<title>$title</title>\n" .
6293                               "<link>$alt_url</link>\n" .
6294                               "</image>\n";
6295                 }
6296                 if (%latest_date) {
6297                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6298                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6299                 }
6300                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6301         } elsif ($format eq 'atom') {
6302                 print <<XML;
6303 <feed xmlns="http://www.w3.org/2005/Atom">
6304 XML
6305                 print "<title>$title</title>\n" .
6306                       "<subtitle>$descr</subtitle>\n" .
6307                       '<link rel="alternate" type="text/html" href="' .
6308                       $alt_url . '" />' . "\n" .
6309                       '<link rel="self" type="' . $content_type . '" href="' .
6310                       $cgi->self_url() . '" />' . "\n" .
6311                       "<id>" . href(-full=>1) . "</id>\n" .
6312                       # use project owner for feed author
6313                       "<author><name>$owner</name></author>\n";
6314                 if (defined $favicon) {
6315                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6316                 }
6317                 if (defined $logo_url) {
6318                         # not twice as wide as tall: 72 x 27 pixels
6319                         print "<logo>" . esc_url($logo) . "</logo>\n";
6320                 }
6321                 if (! %latest_date) {
6322                         # dummy date to keep the feed valid until commits trickle in:
6323                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6324                 } else {
6325                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6326                 }
6327                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6328         }
6329
6330         # contents
6331         for (my $i = 0; $i <= $#commitlist; $i++) {
6332                 my %co = %{$commitlist[$i]};
6333                 my $commit = $co{'id'};
6334                 # we read 150, we always show 30 and the ones more recent than 48 hours
6335                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6336                         last;
6337                 }
6338                 my %cd = parse_date($co{'author_epoch'});
6339
6340                 # get list of changed files
6341                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6342                         $co{'parent'} || "--root",
6343                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6344                         or next;
6345                 my @difftree = map { chomp; $_ } <$fd>;
6346                 close $fd
6347                         or next;
6348
6349                 # print element (entry, item)
6350                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6351                 if ($format eq 'rss') {
6352                         print "<item>\n" .
6353                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6354                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6355                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6356                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6357                               "<link>$co_url</link>\n" .
6358                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6359                               "<content:encoded>" .
6360                               "<![CDATA[\n";
6361                 } elsif ($format eq 'atom') {
6362                         print "<entry>\n" .
6363                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6364                               "<updated>$cd{'iso-8601'}</updated>\n" .
6365                               "<author>\n" .
6366                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6367                         if ($co{'author_email'}) {
6368                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6369                         }
6370                         print "</author>\n" .
6371                               # use committer for contributor
6372                               "<contributor>\n" .
6373                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6374                         if ($co{'committer_email'}) {
6375                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6376                         }
6377                         print "</contributor>\n" .
6378                               "<published>$cd{'iso-8601'}</published>\n" .
6379                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6380                               "<id>$co_url</id>\n" .
6381                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6382                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6383                 }
6384                 my $comment = $co{'comment'};
6385                 print "<pre>\n";
6386                 foreach my $line (@$comment) {
6387                         $line = esc_html($line);
6388                         print "$line\n";
6389                 }
6390                 print "</pre><ul>\n";
6391                 foreach my $difftree_line (@difftree) {
6392                         my %difftree = parse_difftree_raw_line($difftree_line);
6393                         next if !$difftree{'from_id'};
6394
6395                         my $file = $difftree{'file'} || $difftree{'to_file'};
6396
6397                         print "<li>" .
6398                               "[" .
6399                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6400                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6401                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6402                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6403                                       -title => "diff"}, 'D');
6404                         if ($have_blame) {
6405                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6406                                                              file_name=>$file, hash_base=>$commit),
6407                                               -title => "blame"}, 'B');
6408                         }
6409                         # if this is not a feed of a file history
6410                         if (!defined $file_name || $file_name ne $file) {
6411                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6412                                                              file_name=>$file, hash=>$commit),
6413                                               -title => "history"}, 'H');
6414                         }
6415                         $file = esc_path($file);
6416                         print "] ".
6417                               "$file</li>\n";
6418                 }
6419                 if ($format eq 'rss') {
6420                         print "</ul>]]>\n" .
6421                               "</content:encoded>\n" .
6422                               "</item>\n";
6423                 } elsif ($format eq 'atom') {
6424                         print "</ul>\n</div>\n" .
6425                               "</content>\n" .
6426                               "</entry>\n";
6427                 }
6428         }
6429
6430         # end of feed
6431         if ($format eq 'rss') {
6432                 print "</channel>\n</rss>\n";
6433         } elsif ($format eq 'atom') {
6434                 print "</feed>\n";
6435         }
6436 }
6437
6438 sub git_rss {
6439         git_feed('rss');
6440 }
6441
6442 sub git_atom {
6443         git_feed('atom');
6444 }
6445
6446 sub git_opml {
6447         my @list = git_get_projects_list();
6448
6449         print $cgi->header(
6450                 -type => 'text/xml',
6451                 -charset => 'utf-8',
6452                 -content_disposition => 'inline; filename="opml.xml"');
6453
6454         print <<XML;
6455 <?xml version="1.0" encoding="utf-8"?>
6456 <opml version="1.0">
6457 <head>
6458   <title>$site_name OPML Export</title>
6459 </head>
6460 <body>
6461 <outline text="git RSS feeds">
6462 XML
6463
6464         foreach my $pr (@list) {
6465                 my %proj = %$pr;
6466                 my $head = git_get_head_hash($proj{'path'});
6467                 if (!defined $head) {
6468                         next;
6469                 }
6470                 $git_dir = "$projectroot/$proj{'path'}";
6471                 my %co = parse_commit($head);
6472                 if (!%co) {
6473                         next;
6474                 }
6475
6476                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6477                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6478                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6479                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6480         }
6481         print <<XML;
6482 </outline>
6483 </body>
6484 </opml>
6485 XML
6486 }