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'} = to_utf8($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'} = to_utf8($1);
2584                         $co{'committer_epoch'} = $2;
2585                         $co{'committer_tz'} = $3;
2586                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2587                                 $co{'committer_name'}  = $1;
2588                                 $co{'committer_email'} = $2;
2589                         } else {
2590                                 $co{'committer_name'} = $co{'committer'};
2591                         }
2592                 }
2593         }
2594         if (!defined $co{'tree'}) {
2595                 return;
2596         };
2597         $co{'parents'} = \@parents;
2598         $co{'parent'} = $parents[0];
2599
2600         foreach my $title (@commit_lines) {
2601                 $title =~ s/^    //;
2602                 if ($title ne "") {
2603                         $co{'title'} = chop_str($title, 80, 5);
2604                         # remove leading stuff of merges to make the interesting part visible
2605                         if (length($title) > 50) {
2606                                 $title =~ s/^Automatic //;
2607                                 $title =~ s/^merge (of|with) /Merge ... /i;
2608                                 if (length($title) > 50) {
2609                                         $title =~ s/(http|rsync):\/\///;
2610                                 }
2611                                 if (length($title) > 50) {
2612                                         $title =~ s/(master|www|rsync)\.//;
2613                                 }
2614                                 if (length($title) > 50) {
2615                                         $title =~ s/kernel.org:?//;
2616                                 }
2617                                 if (length($title) > 50) {
2618                                         $title =~ s/\/pub\/scm//;
2619                                 }
2620                         }
2621                         $co{'title_short'} = chop_str($title, 50, 5);
2622                         last;
2623                 }
2624         }
2625         if (! defined $co{'title'} || $co{'title'} eq "") {
2626                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2627         }
2628         # remove added spaces
2629         foreach my $line (@commit_lines) {
2630                 $line =~ s/^    //;
2631         }
2632         $co{'comment'} = \@commit_lines;
2633
2634         my $age = time - $co{'committer_epoch'};
2635         $co{'age'} = $age;
2636         $co{'age_string'} = age_string($age);
2637         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2638         if ($age > 60*60*24*7*2) {
2639                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2640                 $co{'age_string_age'} = $co{'age_string'};
2641         } else {
2642                 $co{'age_string_date'} = $co{'age_string'};
2643                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2644         }
2645         return %co;
2646 }
2647
2648 sub parse_commit {
2649         my ($commit_id) = @_;
2650         my %co;
2651
2652         local $/ = "\0";
2653
2654         open my $fd, "-|", git_cmd(), "rev-list",
2655                 "--parents",
2656                 "--header",
2657                 "--max-count=1",
2658                 $commit_id,
2659                 "--",
2660                 or die_error(500, "Open git-rev-list failed");
2661         %co = parse_commit_text(<$fd>, 1);
2662         close $fd;
2663
2664         return %co;
2665 }
2666
2667 sub parse_commits {
2668         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2669         my @cos;
2670
2671         $maxcount ||= 1;
2672         $skip ||= 0;
2673
2674         local $/ = "\0";
2675
2676         open my $fd, "-|", git_cmd(), "rev-list",
2677                 "--header",
2678                 @args,
2679                 ("--max-count=" . $maxcount),
2680                 ("--skip=" . $skip),
2681                 @extra_options,
2682                 $commit_id,
2683                 "--",
2684                 ($filename ? ($filename) : ())
2685                 or die_error(500, "Open git-rev-list failed");
2686         while (my $line = <$fd>) {
2687                 my %co = parse_commit_text($line);
2688                 push @cos, \%co;
2689         }
2690         close $fd;
2691
2692         return wantarray ? @cos : \@cos;
2693 }
2694
2695 # parse line of git-diff-tree "raw" output
2696 sub parse_difftree_raw_line {
2697         my $line = shift;
2698         my %res;
2699
2700         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2701         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2702         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2703                 $res{'from_mode'} = $1;
2704                 $res{'to_mode'} = $2;
2705                 $res{'from_id'} = $3;
2706                 $res{'to_id'} = $4;
2707                 $res{'status'} = $5;
2708                 $res{'similarity'} = $6;
2709                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2710                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2711                 } else {
2712                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2713                 }
2714         }
2715         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2716         # combined diff (for merge commit)
2717         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2718                 $res{'nparents'}  = length($1);
2719                 $res{'from_mode'} = [ split(' ', $2) ];
2720                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2721                 $res{'from_id'} = [ split(' ', $3) ];
2722                 $res{'to_id'} = pop @{$res{'from_id'}};
2723                 $res{'status'} = [ split('', $4) ];
2724                 $res{'to_file'} = unquote($5);
2725         }
2726         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2727         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2728                 $res{'commit'} = $1;
2729         }
2730
2731         return wantarray ? %res : \%res;
2732 }
2733
2734 # wrapper: return parsed line of git-diff-tree "raw" output
2735 # (the argument might be raw line, or parsed info)
2736 sub parsed_difftree_line {
2737         my $line_or_ref = shift;
2738
2739         if (ref($line_or_ref) eq "HASH") {
2740                 # pre-parsed (or generated by hand)
2741                 return $line_or_ref;
2742         } else {
2743                 return parse_difftree_raw_line($line_or_ref);
2744         }
2745 }
2746
2747 # parse line of git-ls-tree output
2748 sub parse_ls_tree_line {
2749         my $line = shift;
2750         my %opts = @_;
2751         my %res;
2752
2753         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2754         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2755
2756         $res{'mode'} = $1;
2757         $res{'type'} = $2;
2758         $res{'hash'} = $3;
2759         if ($opts{'-z'}) {
2760                 $res{'name'} = $4;
2761         } else {
2762                 $res{'name'} = unquote($4);
2763         }
2764
2765         return wantarray ? %res : \%res;
2766 }
2767
2768 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2769 sub parse_from_to_diffinfo {
2770         my ($diffinfo, $from, $to, @parents) = @_;
2771
2772         if ($diffinfo->{'nparents'}) {
2773                 # combined diff
2774                 $from->{'file'} = [];
2775                 $from->{'href'} = [];
2776                 fill_from_file_info($diffinfo, @parents)
2777                         unless exists $diffinfo->{'from_file'};
2778                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2779                         $from->{'file'}[$i] =
2780                                 defined $diffinfo->{'from_file'}[$i] ?
2781                                         $diffinfo->{'from_file'}[$i] :
2782                                         $diffinfo->{'to_file'};
2783                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2784                                 $from->{'href'}[$i] = href(action=>"blob",
2785                                                            hash_base=>$parents[$i],
2786                                                            hash=>$diffinfo->{'from_id'}[$i],
2787                                                            file_name=>$from->{'file'}[$i]);
2788                         } else {
2789                                 $from->{'href'}[$i] = undef;
2790                         }
2791                 }
2792         } else {
2793                 # ordinary (not combined) diff
2794                 $from->{'file'} = $diffinfo->{'from_file'};
2795                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2796                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2797                                                hash=>$diffinfo->{'from_id'},
2798                                                file_name=>$from->{'file'});
2799                 } else {
2800                         delete $from->{'href'};
2801                 }
2802         }
2803
2804         $to->{'file'} = $diffinfo->{'to_file'};
2805         if (!is_deleted($diffinfo)) { # file exists in result
2806                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2807                                      hash=>$diffinfo->{'to_id'},
2808                                      file_name=>$to->{'file'});
2809         } else {
2810                 delete $to->{'href'};
2811         }
2812 }
2813
2814 ## ......................................................................
2815 ## parse to array of hashes functions
2816
2817 sub git_get_heads_list {
2818         my $limit = shift;
2819         my @headslist;
2820
2821         open my $fd, '-|', git_cmd(), 'for-each-ref',
2822                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2823                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2824                 'refs/heads'
2825                 or return;
2826         while (my $line = <$fd>) {
2827                 my %ref_item;
2828
2829                 chomp $line;
2830                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2831                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2832                 my ($committer, $epoch, $tz) =
2833                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2834                 $ref_item{'fullname'}  = $name;
2835                 $name =~ s!^refs/heads/!!;
2836
2837                 $ref_item{'name'}  = $name;
2838                 $ref_item{'id'}    = $hash;
2839                 $ref_item{'title'} = $title || '(no commit message)';
2840                 $ref_item{'epoch'} = $epoch;
2841                 if ($epoch) {
2842                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2843                 } else {
2844                         $ref_item{'age'} = "unknown";
2845                 }
2846
2847                 push @headslist, \%ref_item;
2848         }
2849         close $fd;
2850
2851         return wantarray ? @headslist : \@headslist;
2852 }
2853
2854 sub git_get_tags_list {
2855         my $limit = shift;
2856         my @tagslist;
2857
2858         open my $fd, '-|', git_cmd(), 'for-each-ref',
2859                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2860                 '--format=%(objectname) %(objecttype) %(refname) '.
2861                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2862                 'refs/tags'
2863                 or return;
2864         while (my $line = <$fd>) {
2865                 my %ref_item;
2866
2867                 chomp $line;
2868                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2869                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2870                 my ($creator, $epoch, $tz) =
2871                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2872                 $ref_item{'fullname'} = $name;
2873                 $name =~ s!^refs/tags/!!;
2874
2875                 $ref_item{'type'} = $type;
2876                 $ref_item{'id'} = $id;
2877                 $ref_item{'name'} = $name;
2878                 if ($type eq "tag") {
2879                         $ref_item{'subject'} = $title;
2880                         $ref_item{'reftype'} = $reftype;
2881                         $ref_item{'refid'}   = $refid;
2882                 } else {
2883                         $ref_item{'reftype'} = $type;
2884                         $ref_item{'refid'}   = $id;
2885                 }
2886
2887                 if ($type eq "tag" || $type eq "commit") {
2888                         $ref_item{'epoch'} = $epoch;
2889                         if ($epoch) {
2890                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2891                         } else {
2892                                 $ref_item{'age'} = "unknown";
2893                         }
2894                 }
2895
2896                 push @tagslist, \%ref_item;
2897         }
2898         close $fd;
2899
2900         return wantarray ? @tagslist : \@tagslist;
2901 }
2902
2903 ## ----------------------------------------------------------------------
2904 ## filesystem-related functions
2905
2906 sub get_file_owner {
2907         my $path = shift;
2908
2909         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2910         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2911         if (!defined $gcos) {
2912                 return undef;
2913         }
2914         my $owner = $gcos;
2915         $owner =~ s/[,;].*$//;
2916         return to_utf8($owner);
2917 }
2918
2919 # assume that file exists
2920 sub insert_file {
2921         my $filename = shift;
2922
2923         open my $fd, '<', $filename;
2924         print map { to_utf8($_) } <$fd>;
2925         close $fd;
2926 }
2927
2928 ## ......................................................................
2929 ## mimetype related functions
2930
2931 sub mimetype_guess_file {
2932         my $filename = shift;
2933         my $mimemap = shift;
2934         -r $mimemap or return undef;
2935
2936         my %mimemap;
2937         open(my $mh, '<', $mimemap) or return undef;
2938         while (<$mh>) {
2939                 next if m/^#/; # skip comments
2940                 my ($mimetype, $exts) = split(/\t+/);
2941                 if (defined $exts) {
2942                         my @exts = split(/\s+/, $exts);
2943                         foreach my $ext (@exts) {
2944                                 $mimemap{$ext} = $mimetype;
2945                         }
2946                 }
2947         }
2948         close($mh);
2949
2950         $filename =~ /\.([^.]*)$/;
2951         return $mimemap{$1};
2952 }
2953
2954 sub mimetype_guess {
2955         my $filename = shift;
2956         my $mime;
2957         $filename =~ /\./ or return undef;
2958
2959         if ($mimetypes_file) {
2960                 my $file = $mimetypes_file;
2961                 if ($file !~ m!^/!) { # if it is relative path
2962                         # it is relative to project
2963                         $file = "$projectroot/$project/$file";
2964                 }
2965                 $mime = mimetype_guess_file($filename, $file);
2966         }
2967         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2968         return $mime;
2969 }
2970
2971 sub blob_mimetype {
2972         my $fd = shift;
2973         my $filename = shift;
2974
2975         if ($filename) {
2976                 my $mime = mimetype_guess($filename);
2977                 $mime and return $mime;
2978         }
2979
2980         # just in case
2981         return $default_blob_plain_mimetype unless $fd;
2982
2983         if (-T $fd) {
2984                 return 'text/plain';
2985         } elsif (! $filename) {
2986                 return 'application/octet-stream';
2987         } elsif ($filename =~ m/\.png$/i) {
2988                 return 'image/png';
2989         } elsif ($filename =~ m/\.gif$/i) {
2990                 return 'image/gif';
2991         } elsif ($filename =~ m/\.jpe?g$/i) {
2992                 return 'image/jpeg';
2993         } else {
2994                 return 'application/octet-stream';
2995         }
2996 }
2997
2998 sub blob_contenttype {
2999         my ($fd, $file_name, $type) = @_;
3000
3001         $type ||= blob_mimetype($fd, $file_name);
3002         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3003                 $type .= "; charset=$default_text_plain_charset";
3004         }
3005
3006         return $type;
3007 }
3008
3009 ## ======================================================================
3010 ## functions printing HTML: header, footer, error page
3011
3012 sub git_header_html {
3013         my $status = shift || "200 OK";
3014         my $expires = shift;
3015
3016         my $title = "$site_name";
3017         if (defined $project) {
3018                 $title .= " - " . to_utf8($project);
3019                 if (defined $action) {
3020                         $title .= "/$action";
3021                         if (defined $file_name) {
3022                                 $title .= " - " . esc_path($file_name);
3023                                 if ($action eq "tree" && $file_name !~ m|/$|) {
3024                                         $title .= "/";
3025                                 }
3026                         }
3027                 }
3028         }
3029         my $content_type;
3030         # require explicit support from the UA if we are to send the page as
3031         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3032         # we have to do this because MSIE sometimes globs '*/*', pretending to
3033         # support xhtml+xml but choking when it gets what it asked for.
3034         if (defined $cgi->http('HTTP_ACCEPT') &&
3035             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3036             $cgi->Accept('application/xhtml+xml') != 0) {
3037                 $content_type = 'application/xhtml+xml';
3038         } else {
3039                 $content_type = 'text/html';
3040         }
3041         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3042                            -status=> $status, -expires => $expires);
3043         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3044         print <<EOF;
3045 <?xml version="1.0" encoding="utf-8"?>
3046 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3047 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3048 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3049 <!-- git core binaries version $git_version -->
3050 <head>
3051 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3052 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3053 <meta name="robots" content="index, nofollow"/>
3054 <title>$title</title>
3055 EOF
3056         # the stylesheet, favicon etc urls won't work correctly with path_info
3057         # unless we set the appropriate base URL
3058         if ($ENV{'PATH_INFO'}) {
3059                 print "<base href=\"".esc_url($base_url)."\" />\n";
3060         }
3061         # print out each stylesheet that exist, providing backwards capability
3062         # for those people who defined $stylesheet in a config file
3063         if (defined $stylesheet) {
3064                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3065         } else {
3066                 foreach my $stylesheet (@stylesheets) {
3067                         next unless $stylesheet;
3068                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3069                 }
3070         }
3071         if (defined $project) {
3072                 my %href_params = get_feed_info();
3073                 if (!exists $href_params{'-title'}) {
3074                         $href_params{'-title'} = 'log';
3075                 }
3076
3077                 foreach my $format qw(RSS Atom) {
3078                         my $type = lc($format);
3079                         my %link_attr = (
3080                                 '-rel' => 'alternate',
3081                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3082                                 '-type' => "application/$type+xml"
3083                         );
3084
3085                         $href_params{'action'} = $type;
3086                         $link_attr{'-href'} = href(%href_params);
3087                         print "<link ".
3088                               "rel=\"$link_attr{'-rel'}\" ".
3089                               "title=\"$link_attr{'-title'}\" ".
3090                               "href=\"$link_attr{'-href'}\" ".
3091                               "type=\"$link_attr{'-type'}\" ".
3092                               "/>\n";
3093
3094                         $href_params{'extra_options'} = '--no-merges';
3095                         $link_attr{'-href'} = href(%href_params);
3096                         $link_attr{'-title'} .= ' (no merges)';
3097                         print "<link ".
3098                               "rel=\"$link_attr{'-rel'}\" ".
3099                               "title=\"$link_attr{'-title'}\" ".
3100                               "href=\"$link_attr{'-href'}\" ".
3101                               "type=\"$link_attr{'-type'}\" ".
3102                               "/>\n";
3103                 }
3104
3105         } else {
3106                 printf('<link rel="alternate" title="%s projects list" '.
3107                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3108                        $site_name, href(project=>undef, action=>"project_index"));
3109                 printf('<link rel="alternate" title="%s projects feeds" '.
3110                        'href="%s" type="text/x-opml" />'."\n",
3111                        $site_name, href(project=>undef, action=>"opml"));
3112         }
3113         if (defined $favicon) {
3114                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3115         }
3116
3117         print "</head>\n" .
3118               "<body>\n";
3119
3120         if (-f $site_header) {
3121                 insert_file($site_header);
3122         }
3123
3124         print "<div class=\"page_header\">\n" .
3125               $cgi->a({-href => esc_url($logo_url),
3126                        -title => $logo_label},
3127                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3128         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3129         if (defined $project) {
3130                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3131                 if (defined $action) {
3132                         print " / $action";
3133                 }
3134                 print "\n";
3135         }
3136         print "</div>\n";
3137
3138         my $have_search = gitweb_check_feature('search');
3139         if (defined $project && $have_search) {
3140                 if (!defined $searchtext) {
3141                         $searchtext = "";
3142                 }
3143                 my $search_hash;
3144                 if (defined $hash_base) {
3145                         $search_hash = $hash_base;
3146                 } elsif (defined $hash) {
3147                         $search_hash = $hash;
3148                 } else {
3149                         $search_hash = "HEAD";
3150                 }
3151                 my $action = $my_uri;
3152                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3153                 if ($use_pathinfo) {
3154                         $action .= "/".esc_url($project);
3155                 }
3156                 print $cgi->startform(-method => "get", -action => $action) .
3157                       "<div class=\"search\">\n" .
3158                       (!$use_pathinfo &&
3159                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3160                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3161                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3162                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3163                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3164                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3165                       " search:\n",
3166                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3167                       "<span title=\"Extended regular expression\">" .
3168                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3169                                      -checked => $search_use_regexp) .
3170                       "</span>" .
3171                       "</div>" .
3172                       $cgi->end_form() . "\n";
3173         }
3174 }
3175
3176 sub git_footer_html {
3177         my $feed_class = 'rss_logo';
3178
3179         print "<div class=\"page_footer\">\n";
3180         if (defined $project) {
3181                 my $descr = git_get_project_description($project);
3182                 if (defined $descr) {
3183                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3184                 }
3185
3186                 my %href_params = get_feed_info();
3187                 if (!%href_params) {
3188                         $feed_class .= ' generic';
3189                 }
3190                 $href_params{'-title'} ||= 'log';
3191
3192                 foreach my $format qw(RSS Atom) {
3193                         $href_params{'action'} = lc($format);
3194                         print $cgi->a({-href => href(%href_params),
3195                                       -title => "$href_params{'-title'} $format feed",
3196                                       -class => $feed_class}, $format)."\n";
3197                 }
3198
3199         } else {
3200                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3201                               -class => $feed_class}, "OPML") . " ";
3202                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3203                               -class => $feed_class}, "TXT") . "\n";
3204         }
3205         print "</div>\n"; # class="page_footer"
3206
3207         if (-f $site_footer) {
3208                 insert_file($site_footer);
3209         }
3210
3211         print "</body>\n" .
3212               "</html>";
3213 }
3214
3215 # die_error(<http_status_code>, <error_message>)
3216 # Example: die_error(404, 'Hash not found')
3217 # By convention, use the following status codes (as defined in RFC 2616):
3218 # 400: Invalid or missing CGI parameters, or
3219 #      requested object exists but has wrong type.
3220 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3221 #      this server or project.
3222 # 404: Requested object/revision/project doesn't exist.
3223 # 500: The server isn't configured properly, or
3224 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3225 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3226 sub die_error {
3227         my $status = shift || 500;
3228         my $error = shift || "Internal server error";
3229
3230         my %http_responses = (400 => '400 Bad Request',
3231                               403 => '403 Forbidden',
3232                               404 => '404 Not Found',
3233                               500 => '500 Internal Server Error');
3234         git_header_html($http_responses{$status});
3235         print <<EOF;
3236 <div class="page_body">
3237 <br /><br />
3238 $status - $error
3239 <br />
3240 </div>
3241 EOF
3242         git_footer_html();
3243         exit;
3244 }
3245
3246 ## ----------------------------------------------------------------------
3247 ## functions printing or outputting HTML: navigation
3248
3249 sub git_print_page_nav {
3250         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3251         $extra = '' if !defined $extra; # pager or formats
3252
3253         my @navs = qw(summary shortlog log commit commitdiff tree);
3254         if ($suppress) {
3255                 @navs = grep { $_ ne $suppress } @navs;
3256         }
3257
3258         my %arg = map { $_ => {action=>$_} } @navs;
3259         if (defined $head) {
3260                 for (qw(commit commitdiff)) {
3261                         $arg{$_}{'hash'} = $head;
3262                 }
3263                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3264                         for (qw(shortlog log)) {
3265                                 $arg{$_}{'hash'} = $head;
3266                         }
3267                 }
3268         }
3269
3270         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3271         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3272
3273         my @actions = gitweb_get_feature('actions');
3274         my %repl = (
3275                 '%' => '%',
3276                 'n' => $project,         # project name
3277                 'f' => $git_dir,         # project path within filesystem
3278                 'h' => $treehead || '',  # current hash ('h' parameter)
3279                 'b' => $treebase || '',  # hash base ('hb' parameter)
3280         );
3281         while (@actions) {
3282                 my ($label, $link, $pos) = splice(@actions,0,3);
3283                 # insert
3284                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3285                 # munch munch
3286                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3287                 $arg{$label}{'_href'} = $link;
3288         }
3289
3290         print "<div class=\"page_nav\">\n" .
3291                 (join " | ",
3292                  map { $_ eq $current ?
3293                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3294                  } @navs);
3295         print "<br/>\n$extra<br/>\n" .
3296               "</div>\n";
3297 }
3298
3299 sub format_paging_nav {
3300         my ($action, $hash, $head, $page, $has_next_link) = @_;
3301         my $paging_nav;
3302
3303
3304         if ($hash ne $head || $page) {
3305                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3306         } else {
3307                 $paging_nav .= "HEAD";
3308         }
3309
3310         if ($page > 0) {
3311                 $paging_nav .= " &sdot; " .
3312                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3313                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3314         } else {
3315                 $paging_nav .= " &sdot; prev";
3316         }
3317
3318         if ($has_next_link) {
3319                 $paging_nav .= " &sdot; " .
3320                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3321                                  -accesskey => "n", -title => "Alt-n"}, "next");
3322         } else {
3323                 $paging_nav .= " &sdot; next";
3324         }
3325
3326         return $paging_nav;
3327 }
3328
3329 ## ......................................................................
3330 ## functions printing or outputting HTML: div
3331
3332 sub git_print_header_div {
3333         my ($action, $title, $hash, $hash_base) = @_;
3334         my %args = ();
3335
3336         $args{'action'} = $action;
3337         $args{'hash'} = $hash if $hash;
3338         $args{'hash_base'} = $hash_base if $hash_base;
3339
3340         print "<div class=\"header\">\n" .
3341               $cgi->a({-href => href(%args), -class => "title"},
3342               $title ? $title : $action) .
3343               "\n</div>\n";
3344 }
3345
3346 sub print_local_time {
3347         my %date = @_;
3348         if ($date{'hour_local'} < 6) {
3349                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3350                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3351         } else {
3352                 printf(" (%02d:%02d %s)",
3353                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3354         }
3355 }
3356
3357 # Outputs the author name and date in long form
3358 sub git_print_authorship {
3359         my $co = shift;
3360         my %opts = @_;
3361         my $tag = $opts{-tag} || 'div';
3362
3363         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3364         print "<$tag class=\"author_date\">" .
3365               esc_html($co->{'author_name'}) .
3366               " [$ad{'rfc2822'}";
3367         print_local_time(%ad) if ($opts{-localtime});
3368         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3369                   . "</$tag>\n";
3370 }
3371
3372 # Outputs table rows containing the full author or committer information,
3373 # in the format expected for 'commit' view (& similia).
3374 # Parameters are a commit hash reference, followed by the list of people
3375 # to output information for. If the list is empty it defalts to both
3376 # author and committer.
3377 sub git_print_authorship_rows {
3378         my $co = shift;
3379         # too bad we can't use @people = @_ || ('author', 'committer')
3380         my @people = @_;
3381         @people = ('author', 'committer') unless @people;
3382         foreach my $who (@people) {
3383                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3384                 print "<tr><td>$who</td><td>" . esc_html($co->{$who}) . "</td>" .
3385                       "<td rowspan=\"2\">" .
3386                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3387                       "</td></tr>\n" .
3388                       "<tr>" .
3389                       "<td></td><td> $wd{'rfc2822'}";
3390                 print_local_time(%wd);
3391                 print "</td>" .
3392                       "</tr>\n";
3393         }
3394 }
3395
3396 sub git_print_page_path {
3397         my $name = shift;
3398         my $type = shift;
3399         my $hb = shift;
3400
3401
3402         print "<div class=\"page_path\">";
3403         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3404                       -title => 'tree root'}, to_utf8("[$project]"));
3405         print " / ";
3406         if (defined $name) {
3407                 my @dirname = split '/', $name;
3408                 my $basename = pop @dirname;
3409                 my $fullname = '';
3410
3411                 foreach my $dir (@dirname) {
3412                         $fullname .= ($fullname ? '/' : '') . $dir;
3413                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3414                                                      hash_base=>$hb),
3415                                       -title => $fullname}, esc_path($dir));
3416                         print " / ";
3417                 }
3418                 if (defined $type && $type eq 'blob') {
3419                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3420                                                      hash_base=>$hb),
3421                                       -title => $name}, esc_path($basename));
3422                 } elsif (defined $type && $type eq 'tree') {
3423                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3424                                                      hash_base=>$hb),
3425                                       -title => $name}, esc_path($basename));
3426                         print " / ";
3427                 } else {
3428                         print esc_path($basename);
3429                 }
3430         }
3431         print "<br/></div>\n";
3432 }
3433
3434 sub git_print_log {
3435         my $log = shift;
3436         my %opts = @_;
3437
3438         if ($opts{'-remove_title'}) {
3439                 # remove title, i.e. first line of log
3440                 shift @$log;
3441         }
3442         # remove leading empty lines
3443         while (defined $log->[0] && $log->[0] eq "") {
3444                 shift @$log;
3445         }
3446
3447         # print log
3448         my $signoff = 0;
3449         my $empty = 0;
3450         foreach my $line (@$log) {
3451                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3452                         $signoff = 1;
3453                         $empty = 0;
3454                         if (! $opts{'-remove_signoff'}) {
3455                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3456                                 next;
3457                         } else {
3458                                 # remove signoff lines
3459                                 next;
3460                         }
3461                 } else {
3462                         $signoff = 0;
3463                 }
3464
3465                 # print only one empty line
3466                 # do not print empty line after signoff
3467                 if ($line eq "") {
3468                         next if ($empty || $signoff);
3469                         $empty = 1;
3470                 } else {
3471                         $empty = 0;
3472                 }
3473
3474                 print format_log_line_html($line) . "<br/>\n";
3475         }
3476
3477         if ($opts{'-final_empty_line'}) {
3478                 # end with single empty line
3479                 print "<br/>\n" unless $empty;
3480         }
3481 }
3482
3483 # return link target (what link points to)
3484 sub git_get_link_target {
3485         my $hash = shift;
3486         my $link_target;
3487
3488         # read link
3489         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3490                 or return;
3491         {
3492                 local $/ = undef;
3493                 $link_target = <$fd>;
3494         }
3495         close $fd
3496                 or return;
3497
3498         return $link_target;
3499 }
3500
3501 # given link target, and the directory (basedir) the link is in,
3502 # return target of link relative to top directory (top tree);
3503 # return undef if it is not possible (including absolute links).
3504 sub normalize_link_target {
3505         my ($link_target, $basedir) = @_;
3506
3507         # absolute symlinks (beginning with '/') cannot be normalized
3508         return if (substr($link_target, 0, 1) eq '/');
3509
3510         # normalize link target to path from top (root) tree (dir)
3511         my $path;
3512         if ($basedir) {
3513                 $path = $basedir . '/' . $link_target;
3514         } else {
3515                 # we are in top (root) tree (dir)
3516                 $path = $link_target;
3517         }
3518
3519         # remove //, /./, and /../
3520         my @path_parts;
3521         foreach my $part (split('/', $path)) {
3522                 # discard '.' and ''
3523                 next if (!$part || $part eq '.');
3524                 # handle '..'
3525                 if ($part eq '..') {
3526                         if (@path_parts) {
3527                                 pop @path_parts;
3528                         } else {
3529                                 # link leads outside repository (outside top dir)
3530                                 return;
3531                         }
3532                 } else {
3533                         push @path_parts, $part;
3534                 }
3535         }
3536         $path = join('/', @path_parts);
3537
3538         return $path;
3539 }
3540
3541 # print tree entry (row of git_tree), but without encompassing <tr> element
3542 sub git_print_tree_entry {
3543         my ($t, $basedir, $hash_base, $have_blame) = @_;
3544
3545         my %base_key = ();
3546         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3547
3548         # The format of a table row is: mode list link.  Where mode is
3549         # the mode of the entry, list is the name of the entry, an href,
3550         # and link is the action links of the entry.
3551
3552         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3553         if ($t->{'type'} eq "blob") {
3554                 print "<td class=\"list\">" .
3555                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3556                                                file_name=>"$basedir$t->{'name'}", %base_key),
3557                                 -class => "list"}, esc_path($t->{'name'}));
3558                 if (S_ISLNK(oct $t->{'mode'})) {
3559                         my $link_target = git_get_link_target($t->{'hash'});
3560                         if ($link_target) {
3561                                 my $norm_target = normalize_link_target($link_target, $basedir);
3562                                 if (defined $norm_target) {
3563                                         print " -> " .
3564                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3565                                                                      file_name=>$norm_target),
3566                                                        -title => $norm_target}, esc_path($link_target));
3567                                 } else {
3568                                         print " -> " . esc_path($link_target);
3569                                 }
3570                         }
3571                 }
3572                 print "</td>\n";
3573                 print "<td class=\"link\">";
3574                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3575                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3576                               "blob");
3577                 if ($have_blame) {
3578                         print " | " .
3579                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3580                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3581                                       "blame");
3582                 }
3583                 if (defined $hash_base) {
3584                         print " | " .
3585                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3586                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3587                                       "history");
3588                 }
3589                 print " | " .
3590                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3591                                                file_name=>"$basedir$t->{'name'}")},
3592                                 "raw");
3593                 print "</td>\n";
3594
3595         } elsif ($t->{'type'} eq "tree") {
3596                 print "<td class=\"list\">";
3597                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3598                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3599                               esc_path($t->{'name'}));
3600                 print "</td>\n";
3601                 print "<td class=\"link\">";
3602                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3603                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3604                               "tree");
3605                 if (defined $hash_base) {
3606                         print " | " .
3607                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3608                                                      file_name=>"$basedir$t->{'name'}")},
3609                                       "history");
3610                 }
3611                 print "</td>\n";
3612         } else {
3613                 # unknown object: we can only present history for it
3614                 # (this includes 'commit' object, i.e. submodule support)
3615                 print "<td class=\"list\">" .
3616                       esc_path($t->{'name'}) .
3617                       "</td>\n";
3618                 print "<td class=\"link\">";
3619                 if (defined $hash_base) {
3620                         print $cgi->a({-href => href(action=>"history",
3621                                                      hash_base=>$hash_base,
3622                                                      file_name=>"$basedir$t->{'name'}")},
3623                                       "history");
3624                 }
3625                 print "</td>\n";
3626         }
3627 }
3628
3629 ## ......................................................................
3630 ## functions printing large fragments of HTML
3631
3632 # get pre-image filenames for merge (combined) diff
3633 sub fill_from_file_info {
3634         my ($diff, @parents) = @_;
3635
3636         $diff->{'from_file'} = [ ];
3637         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3638         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3639                 if ($diff->{'status'}[$i] eq 'R' ||
3640                     $diff->{'status'}[$i] eq 'C') {
3641                         $diff->{'from_file'}[$i] =
3642                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3643                 }
3644         }
3645
3646         return $diff;
3647 }
3648
3649 # is current raw difftree line of file deletion
3650 sub is_deleted {
3651         my $diffinfo = shift;
3652
3653         return $diffinfo->{'to_id'} eq ('0' x 40);
3654 }
3655
3656 # does patch correspond to [previous] difftree raw line
3657 # $diffinfo  - hashref of parsed raw diff format
3658 # $patchinfo - hashref of parsed patch diff format
3659 #              (the same keys as in $diffinfo)
3660 sub is_patch_split {
3661         my ($diffinfo, $patchinfo) = @_;
3662
3663         return defined $diffinfo && defined $patchinfo
3664                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3665 }
3666
3667
3668 sub git_difftree_body {
3669         my ($difftree, $hash, @parents) = @_;
3670         my ($parent) = $parents[0];
3671         my $have_blame = gitweb_check_feature('blame');
3672         print "<div class=\"list_head\">\n";
3673         if ($#{$difftree} > 10) {
3674                 print(($#{$difftree} + 1) . " files changed:\n");
3675         }
3676         print "</div>\n";
3677
3678         print "<table class=\"" .
3679               (@parents > 1 ? "combined " : "") .
3680               "diff_tree\">\n";
3681
3682         # header only for combined diff in 'commitdiff' view
3683         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3684         if ($has_header) {
3685                 # table header
3686                 print "<thead><tr>\n" .
3687                        "<th></th><th></th>\n"; # filename, patchN link
3688                 for (my $i = 0; $i < @parents; $i++) {
3689                         my $par = $parents[$i];
3690                         print "<th>" .
3691                               $cgi->a({-href => href(action=>"commitdiff",
3692                                                      hash=>$hash, hash_parent=>$par),
3693                                        -title => 'commitdiff to parent number ' .
3694                                                   ($i+1) . ': ' . substr($par,0,7)},
3695                                       $i+1) .
3696                               "&nbsp;</th>\n";
3697                 }
3698                 print "</tr></thead>\n<tbody>\n";
3699         }
3700
3701         my $alternate = 1;
3702         my $patchno = 0;
3703         foreach my $line (@{$difftree}) {
3704                 my $diff = parsed_difftree_line($line);
3705
3706                 if ($alternate) {
3707                         print "<tr class=\"dark\">\n";
3708                 } else {
3709                         print "<tr class=\"light\">\n";
3710                 }
3711                 $alternate ^= 1;
3712
3713                 if (exists $diff->{'nparents'}) { # combined diff
3714
3715                         fill_from_file_info($diff, @parents)
3716                                 unless exists $diff->{'from_file'};
3717
3718                         if (!is_deleted($diff)) {
3719                                 # file exists in the result (child) commit
3720                                 print "<td>" .
3721                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3722                                                              file_name=>$diff->{'to_file'},
3723                                                              hash_base=>$hash),
3724                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3725                                       "</td>\n";
3726                         } else {
3727                                 print "<td>" .
3728                                       esc_path($diff->{'to_file'}) .
3729                                       "</td>\n";
3730                         }
3731
3732                         if ($action eq 'commitdiff') {
3733                                 # link to patch
3734                                 $patchno++;
3735                                 print "<td class=\"link\">" .
3736                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3737                                       " | " .
3738                                       "</td>\n";
3739                         }
3740
3741                         my $has_history = 0;
3742                         my $not_deleted = 0;
3743                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3744                                 my $hash_parent = $parents[$i];
3745                                 my $from_hash = $diff->{'from_id'}[$i];
3746                                 my $from_path = $diff->{'from_file'}[$i];
3747                                 my $status = $diff->{'status'}[$i];
3748
3749                                 $has_history ||= ($status ne 'A');
3750                                 $not_deleted ||= ($status ne 'D');
3751
3752                                 if ($status eq 'A') {
3753                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3754                                 } elsif ($status eq 'D') {
3755                                         print "<td class=\"link\">" .
3756                                               $cgi->a({-href => href(action=>"blob",
3757                                                                      hash_base=>$hash,
3758                                                                      hash=>$from_hash,
3759                                                                      file_name=>$from_path)},
3760                                                       "blob" . ($i+1)) .
3761                                               " | </td>\n";
3762                                 } else {
3763                                         if ($diff->{'to_id'} eq $from_hash) {
3764                                                 print "<td class=\"link nochange\">";
3765                                         } else {
3766                                                 print "<td class=\"link\">";
3767                                         }
3768                                         print $cgi->a({-href => href(action=>"blobdiff",
3769                                                                      hash=>$diff->{'to_id'},
3770                                                                      hash_parent=>$from_hash,
3771                                                                      hash_base=>$hash,
3772                                                                      hash_parent_base=>$hash_parent,
3773                                                                      file_name=>$diff->{'to_file'},
3774                                                                      file_parent=>$from_path)},
3775                                                       "diff" . ($i+1)) .
3776                                               " | </td>\n";
3777                                 }
3778                         }
3779
3780                         print "<td class=\"link\">";
3781                         if ($not_deleted) {
3782                                 print $cgi->a({-href => href(action=>"blob",
3783                                                              hash=>$diff->{'to_id'},
3784                                                              file_name=>$diff->{'to_file'},
3785                                                              hash_base=>$hash)},
3786                                               "blob");
3787                                 print " | " if ($has_history);
3788                         }
3789                         if ($has_history) {
3790                                 print $cgi->a({-href => href(action=>"history",
3791                                                              file_name=>$diff->{'to_file'},
3792                                                              hash_base=>$hash)},
3793                                               "history");
3794                         }
3795                         print "</td>\n";
3796
3797                         print "</tr>\n";
3798                         next; # instead of 'else' clause, to avoid extra indent
3799                 }
3800                 # else ordinary diff
3801
3802                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3803                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3804                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3805                         $to_mode_oct = oct $diff->{'to_mode'};
3806                         if (S_ISREG($to_mode_oct)) { # only for regular file
3807                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3808                         }
3809                         $to_file_type = file_type($diff->{'to_mode'});
3810                 }
3811                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3812                         $from_mode_oct = oct $diff->{'from_mode'};
3813                         if (S_ISREG($to_mode_oct)) { # only for regular file
3814                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3815                         }
3816                         $from_file_type = file_type($diff->{'from_mode'});
3817                 }
3818
3819                 if ($diff->{'status'} eq "A") { # created
3820                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3821                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3822                         $mode_chng   .= "]</span>";
3823                         print "<td>";
3824                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3825                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3826                                       -class => "list"}, esc_path($diff->{'file'}));
3827                         print "</td>\n";
3828                         print "<td>$mode_chng</td>\n";
3829                         print "<td class=\"link\">";
3830                         if ($action eq 'commitdiff') {
3831                                 # link to patch
3832                                 $patchno++;
3833                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3834                                 print " | ";
3835                         }
3836                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3837                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3838                                       "blob");
3839                         print "</td>\n";
3840
3841                 } elsif ($diff->{'status'} eq "D") { # deleted
3842                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3843                         print "<td>";
3844                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3845                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3846                                        -class => "list"}, esc_path($diff->{'file'}));
3847                         print "</td>\n";
3848                         print "<td>$mode_chng</td>\n";
3849                         print "<td class=\"link\">";
3850                         if ($action eq 'commitdiff') {
3851                                 # link to patch
3852                                 $patchno++;
3853                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3854                                 print " | ";
3855                         }
3856                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3857                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3858                                       "blob") . " | ";
3859                         if ($have_blame) {
3860                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3861                                                              file_name=>$diff->{'file'})},
3862                                               "blame") . " | ";
3863                         }
3864                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3865                                                      file_name=>$diff->{'file'})},
3866                                       "history");
3867                         print "</td>\n";
3868
3869                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3870                         my $mode_chnge = "";
3871                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3872                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3873                                 if ($from_file_type ne $to_file_type) {
3874                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3875                                 }
3876                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3877                                         if ($from_mode_str && $to_mode_str) {
3878                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3879                                         } elsif ($to_mode_str) {
3880                                                 $mode_chnge .= " mode: $to_mode_str";
3881                                         }
3882                                 }
3883                                 $mode_chnge .= "]</span>\n";
3884                         }
3885                         print "<td>";
3886                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3887                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3888                                       -class => "list"}, esc_path($diff->{'file'}));
3889                         print "</td>\n";
3890                         print "<td>$mode_chnge</td>\n";
3891                         print "<td class=\"link\">";
3892                         if ($action eq 'commitdiff') {
3893                                 # link to patch
3894                                 $patchno++;
3895                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3896                                       " | ";
3897                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3898                                 # "commit" view and modified file (not onlu mode changed)
3899                                 print $cgi->a({-href => href(action=>"blobdiff",
3900                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3901                                                              hash_base=>$hash, hash_parent_base=>$parent,
3902                                                              file_name=>$diff->{'file'})},
3903                                               "diff") .
3904                                       " | ";
3905                         }
3906                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3907                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3908                                        "blob") . " | ";
3909                         if ($have_blame) {
3910                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3911                                                              file_name=>$diff->{'file'})},
3912                                               "blame") . " | ";
3913                         }
3914                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3915                                                      file_name=>$diff->{'file'})},
3916                                       "history");
3917                         print "</td>\n";
3918
3919                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3920                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3921                         my $nstatus = $status_name{$diff->{'status'}};
3922                         my $mode_chng = "";
3923                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3924                                 # mode also for directories, so we cannot use $to_mode_str
3925                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3926                         }
3927                         print "<td>" .
3928                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3929                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3930                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3931                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3932                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3933                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3934                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3935                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3936                               "<td class=\"link\">";
3937                         if ($action eq 'commitdiff') {
3938                                 # link to patch
3939                                 $patchno++;
3940                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3941                                       " | ";
3942                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3943                                 # "commit" view and modified file (not only pure rename or copy)
3944                                 print $cgi->a({-href => href(action=>"blobdiff",
3945                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3946                                                              hash_base=>$hash, hash_parent_base=>$parent,
3947                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3948                                               "diff") .
3949                                       " | ";
3950                         }
3951                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3952                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3953                                       "blob") . " | ";
3954                         if ($have_blame) {
3955                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3956                                                              file_name=>$diff->{'to_file'})},
3957                                               "blame") . " | ";
3958                         }
3959                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3960                                                     file_name=>$diff->{'to_file'})},
3961                                       "history");
3962                         print "</td>\n";
3963
3964                 } # we should not encounter Unmerged (U) or Unknown (X) status
3965                 print "</tr>\n";
3966         }
3967         print "</tbody>" if $has_header;
3968         print "</table>\n";
3969 }
3970
3971 sub git_patchset_body {
3972         my ($fd, $difftree, $hash, @hash_parents) = @_;
3973         my ($hash_parent) = $hash_parents[0];
3974
3975         my $is_combined = (@hash_parents > 1);
3976         my $patch_idx = 0;
3977         my $patch_number = 0;
3978         my $patch_line;
3979         my $diffinfo;
3980         my $to_name;
3981         my (%from, %to);
3982
3983         print "<div class=\"patchset\">\n";
3984
3985         # skip to first patch
3986         while ($patch_line = <$fd>) {
3987                 chomp $patch_line;
3988
3989                 last if ($patch_line =~ m/^diff /);
3990         }
3991
3992  PATCH:
3993         while ($patch_line) {
3994
3995                 # parse "git diff" header line
3996                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
3997                         # $1 is from_name, which we do not use
3998                         $to_name = unquote($2);
3999                         $to_name =~ s!^b/!!;
4000                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4001                         # $1 is 'cc' or 'combined', which we do not use
4002                         $to_name = unquote($2);
4003                 } else {
4004                         $to_name = undef;
4005                 }
4006
4007                 # check if current patch belong to current raw line
4008                 # and parse raw git-diff line if needed
4009                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4010                         # this is continuation of a split patch
4011                         print "<div class=\"patch cont\">\n";
4012                 } else {
4013                         # advance raw git-diff output if needed
4014                         $patch_idx++ if defined $diffinfo;
4015
4016                         # read and prepare patch information
4017                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4018
4019                         # compact combined diff output can have some patches skipped
4020                         # find which patch (using pathname of result) we are at now;
4021                         if ($is_combined) {
4022                                 while ($to_name ne $diffinfo->{'to_file'}) {
4023                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4024                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4025                                               "</div>\n";  # class="patch"
4026
4027                                         $patch_idx++;
4028                                         $patch_number++;
4029
4030                                         last if $patch_idx > $#$difftree;
4031                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4032                                 }
4033                         }
4034
4035                         # modifies %from, %to hashes
4036                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4037
4038                         # this is first patch for raw difftree line with $patch_idx index
4039                         # we index @$difftree array from 0, but number patches from 1
4040                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4041                 }
4042
4043                 # git diff header
4044                 #assert($patch_line =~ m/^diff /) if DEBUG;
4045                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4046                 $patch_number++;
4047                 # print "git diff" header
4048                 print format_git_diff_header_line($patch_line, $diffinfo,
4049                                                   \%from, \%to);
4050
4051                 # print extended diff header
4052                 print "<div class=\"diff extended_header\">\n";
4053         EXTENDED_HEADER:
4054                 while ($patch_line = <$fd>) {
4055                         chomp $patch_line;
4056
4057                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4058
4059                         print format_extended_diff_header_line($patch_line, $diffinfo,
4060                                                                \%from, \%to);
4061                 }
4062                 print "</div>\n"; # class="diff extended_header"
4063
4064                 # from-file/to-file diff header
4065                 if (! $patch_line) {
4066                         print "</div>\n"; # class="patch"
4067                         last PATCH;
4068                 }
4069                 next PATCH if ($patch_line =~ m/^diff /);
4070                 #assert($patch_line =~ m/^---/) if DEBUG;
4071
4072                 my $last_patch_line = $patch_line;
4073                 $patch_line = <$fd>;
4074                 chomp $patch_line;
4075                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4076
4077                 print format_diff_from_to_header($last_patch_line, $patch_line,
4078                                                  $diffinfo, \%from, \%to,
4079                                                  @hash_parents);
4080
4081                 # the patch itself
4082         LINE:
4083                 while ($patch_line = <$fd>) {
4084                         chomp $patch_line;
4085
4086                         next PATCH if ($patch_line =~ m/^diff /);
4087
4088                         print format_diff_line($patch_line, \%from, \%to);
4089                 }
4090
4091         } continue {
4092                 print "</div>\n"; # class="patch"
4093         }
4094
4095         # for compact combined (--cc) format, with chunk and patch simpliciaction
4096         # patchset might be empty, but there might be unprocessed raw lines
4097         for (++$patch_idx if $patch_number > 0;
4098              $patch_idx < @$difftree;
4099              ++$patch_idx) {
4100                 # read and prepare patch information
4101                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4102
4103                 # generate anchor for "patch" links in difftree / whatchanged part
4104                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4105                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4106                       "</div>\n";  # class="patch"
4107
4108                 $patch_number++;
4109         }
4110
4111         if ($patch_number == 0) {
4112                 if (@hash_parents > 1) {
4113                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4114                 } else {
4115                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4116                 }
4117         }
4118
4119         print "</div>\n"; # class="patchset"
4120 }
4121
4122 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4123
4124 # fills project list info (age, description, owner, forks) for each
4125 # project in the list, removing invalid projects from returned list
4126 # NOTE: modifies $projlist, but does not remove entries from it
4127 sub fill_project_list_info {
4128         my ($projlist, $check_forks) = @_;
4129         my @projects;
4130
4131         my $show_ctags = gitweb_check_feature('ctags');
4132  PROJECT:
4133         foreach my $pr (@$projlist) {
4134                 my (@activity) = git_get_last_activity($pr->{'path'});
4135                 unless (@activity) {
4136                         next PROJECT;
4137                 }
4138                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4139                 if (!defined $pr->{'descr'}) {
4140                         my $descr = git_get_project_description($pr->{'path'}) || "";
4141                         $descr = to_utf8($descr);
4142                         $pr->{'descr_long'} = $descr;
4143                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4144                 }
4145                 if (!defined $pr->{'owner'}) {
4146                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4147                 }
4148                 if ($check_forks) {
4149                         my $pname = $pr->{'path'};
4150                         if (($pname =~ s/\.git$//) &&
4151                             ($pname !~ /\/$/) &&
4152                             (-d "$projectroot/$pname")) {
4153                                 $pr->{'forks'} = "-d $projectroot/$pname";
4154                         } else {
4155                                 $pr->{'forks'} = 0;
4156                         }
4157                 }
4158                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4159                 push @projects, $pr;
4160         }
4161
4162         return @projects;
4163 }
4164
4165 # print 'sort by' <th> element, generating 'sort by $name' replay link
4166 # if that order is not selected
4167 sub print_sort_th {
4168         my ($name, $order, $header) = @_;
4169         $header ||= ucfirst($name);
4170
4171         if ($order eq $name) {
4172                 print "<th>$header</th>\n";
4173         } else {
4174                 print "<th>" .
4175                       $cgi->a({-href => href(-replay=>1, order=>$name),
4176                                -class => "header"}, $header) .
4177                       "</th>\n";
4178         }
4179 }
4180
4181 sub git_project_list_body {
4182         # actually uses global variable $project
4183         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4184
4185         my $check_forks = gitweb_check_feature('forks');
4186         my @projects = fill_project_list_info($projlist, $check_forks);
4187
4188         $order ||= $default_projects_order;
4189         $from = 0 unless defined $from;
4190         $to = $#projects if (!defined $to || $#projects < $to);
4191
4192         my %order_info = (
4193                 project => { key => 'path', type => 'str' },
4194                 descr => { key => 'descr_long', type => 'str' },
4195                 owner => { key => 'owner', type => 'str' },
4196                 age => { key => 'age', type => 'num' }
4197         );
4198         my $oi = $order_info{$order};
4199         if ($oi->{'type'} eq 'str') {
4200                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4201         } else {
4202                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4203         }
4204
4205         my $show_ctags = gitweb_check_feature('ctags');
4206         if ($show_ctags) {
4207                 my %ctags;
4208                 foreach my $p (@projects) {
4209                         foreach my $ct (keys %{$p->{'ctags'}}) {
4210                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4211                         }
4212                 }
4213                 my $cloud = git_populate_project_tagcloud(\%ctags);
4214                 print git_show_project_tagcloud($cloud, 64);
4215         }
4216
4217         print "<table class=\"project_list\">\n";
4218         unless ($no_header) {
4219                 print "<tr>\n";
4220                 if ($check_forks) {
4221                         print "<th></th>\n";
4222                 }
4223                 print_sort_th('project', $order, 'Project');
4224                 print_sort_th('descr', $order, 'Description');
4225                 print_sort_th('owner', $order, 'Owner');
4226                 print_sort_th('age', $order, 'Last Change');
4227                 print "<th></th>\n" . # for links
4228                       "</tr>\n";
4229         }
4230         my $alternate = 1;
4231         my $tagfilter = $cgi->param('by_tag');
4232         for (my $i = $from; $i <= $to; $i++) {
4233                 my $pr = $projects[$i];
4234
4235                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4236                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4237                         and not $pr->{'descr_long'} =~ /$searchtext/;
4238                 # Weed out forks or non-matching entries of search
4239                 if ($check_forks) {
4240                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4241                         $forkbase="^$forkbase" if $forkbase;
4242                         next if not $searchtext and not $tagfilter and $show_ctags
4243                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4244                 }
4245
4246                 if ($alternate) {
4247                         print "<tr class=\"dark\">\n";
4248                 } else {
4249                         print "<tr class=\"light\">\n";
4250                 }
4251                 $alternate ^= 1;
4252                 if ($check_forks) {
4253                         print "<td>";
4254                         if ($pr->{'forks'}) {
4255                                 print "<!-- $pr->{'forks'} -->\n";
4256                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4257                         }
4258                         print "</td>\n";
4259                 }
4260                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4261                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4262                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4263                                         -class => "list", -title => $pr->{'descr_long'}},
4264                                         esc_html($pr->{'descr'})) . "</td>\n" .
4265                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4266                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4267                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4268                       "<td class=\"link\">" .
4269                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4270                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4271                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4272                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4273                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4274                       "</td>\n" .
4275                       "</tr>\n";
4276         }
4277         if (defined $extra) {
4278                 print "<tr>\n";
4279                 if ($check_forks) {
4280                         print "<td></td>\n";
4281                 }
4282                 print "<td colspan=\"5\">$extra</td>\n" .
4283                       "</tr>\n";
4284         }
4285         print "</table>\n";
4286 }
4287
4288 sub git_shortlog_body {
4289         # uses global variable $project
4290         my ($commitlist, $from, $to, $refs, $extra) = @_;
4291
4292         $from = 0 unless defined $from;
4293         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4294
4295         print "<table class=\"shortlog\">\n";
4296         my $alternate = 1;
4297         for (my $i = $from; $i <= $to; $i++) {
4298                 my %co = %{$commitlist->[$i]};
4299                 my $commit = $co{'id'};
4300                 my $ref = format_ref_marker($refs, $commit);
4301                 if ($alternate) {
4302                         print "<tr class=\"dark\">\n";
4303                 } else {
4304                         print "<tr class=\"light\">\n";
4305                 }
4306                 $alternate ^= 1;
4307                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4308                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4309                       format_author_html('td', \%co, 10) . "<td>";
4310                 print format_subject_html($co{'title'}, $co{'title_short'},
4311                                           href(action=>"commit", hash=>$commit), $ref);
4312                 print "</td>\n" .
4313                       "<td class=\"link\">" .
4314                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4315                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4316                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4317                 my $snapshot_links = format_snapshot_links($commit);
4318                 if (defined $snapshot_links) {
4319                         print " | " . $snapshot_links;
4320                 }
4321                 print "</td>\n" .
4322                       "</tr>\n";
4323         }
4324         if (defined $extra) {
4325                 print "<tr>\n" .
4326                       "<td colspan=\"4\">$extra</td>\n" .
4327                       "</tr>\n";
4328         }
4329         print "</table>\n";
4330 }
4331
4332 sub git_history_body {
4333         # Warning: assumes constant type (blob or tree) during history
4334         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4335
4336         $from = 0 unless defined $from;
4337         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4338
4339         print "<table class=\"history\">\n";
4340         my $alternate = 1;
4341         for (my $i = $from; $i <= $to; $i++) {
4342                 my %co = %{$commitlist->[$i]};
4343                 if (!%co) {
4344                         next;
4345                 }
4346                 my $commit = $co{'id'};
4347
4348                 my $ref = format_ref_marker($refs, $commit);
4349
4350                 if ($alternate) {
4351                         print "<tr class=\"dark\">\n";
4352                 } else {
4353                         print "<tr class=\"light\">\n";
4354                 }
4355                 $alternate ^= 1;
4356                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4357         # shortlog:   format_author_html('td', \%co, 10)
4358                       format_author_html('td', \%co, 15, 3) . "<td>";
4359                 # originally git_history used chop_str($co{'title'}, 50)
4360                 print format_subject_html($co{'title'}, $co{'title_short'},
4361                                           href(action=>"commit", hash=>$commit), $ref);
4362                 print "</td>\n" .
4363                       "<td class=\"link\">" .
4364                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4365                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4366
4367                 if ($ftype eq 'blob') {
4368                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4369                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4370                         if (defined $blob_current && defined $blob_parent &&
4371                                         $blob_current ne $blob_parent) {
4372                                 print " | " .
4373                                         $cgi->a({-href => href(action=>"blobdiff",
4374                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4375                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4376                                                                file_name=>$file_name)},
4377                                                 "diff to current");
4378                         }
4379                 }
4380                 print "</td>\n" .
4381                       "</tr>\n";
4382         }
4383         if (defined $extra) {
4384                 print "<tr>\n" .
4385                       "<td colspan=\"4\">$extra</td>\n" .
4386                       "</tr>\n";
4387         }
4388         print "</table>\n";
4389 }
4390
4391 sub git_tags_body {
4392         # uses global variable $project
4393         my ($taglist, $from, $to, $extra) = @_;
4394         $from = 0 unless defined $from;
4395         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4396
4397         print "<table class=\"tags\">\n";
4398         my $alternate = 1;
4399         for (my $i = $from; $i <= $to; $i++) {
4400                 my $entry = $taglist->[$i];
4401                 my %tag = %$entry;
4402                 my $comment = $tag{'subject'};
4403                 my $comment_short;
4404                 if (defined $comment) {
4405                         $comment_short = chop_str($comment, 30, 5);
4406                 }
4407                 if ($alternate) {
4408                         print "<tr class=\"dark\">\n";
4409                 } else {
4410                         print "<tr class=\"light\">\n";
4411                 }
4412                 $alternate ^= 1;
4413                 if (defined $tag{'age'}) {
4414                         print "<td><i>$tag{'age'}</i></td>\n";
4415                 } else {
4416                         print "<td></td>\n";
4417                 }
4418                 print "<td>" .
4419                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4420                                -class => "list name"}, esc_html($tag{'name'})) .
4421                       "</td>\n" .
4422                       "<td>";
4423                 if (defined $comment) {
4424                         print format_subject_html($comment, $comment_short,
4425                                                   href(action=>"tag", hash=>$tag{'id'}));
4426                 }
4427                 print "</td>\n" .
4428                       "<td class=\"selflink\">";
4429                 if ($tag{'type'} eq "tag") {
4430                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4431                 } else {
4432                         print "&nbsp;";
4433                 }
4434                 print "</td>\n" .
4435                       "<td class=\"link\">" . " | " .
4436                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4437                 if ($tag{'reftype'} eq "commit") {
4438                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4439                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4440                 } elsif ($tag{'reftype'} eq "blob") {
4441                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4442                 }
4443                 print "</td>\n" .
4444                       "</tr>";
4445         }
4446         if (defined $extra) {
4447                 print "<tr>\n" .
4448                       "<td colspan=\"5\">$extra</td>\n" .
4449                       "</tr>\n";
4450         }
4451         print "</table>\n";
4452 }
4453
4454 sub git_heads_body {
4455         # uses global variable $project
4456         my ($headlist, $head, $from, $to, $extra) = @_;
4457         $from = 0 unless defined $from;
4458         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4459
4460         print "<table class=\"heads\">\n";
4461         my $alternate = 1;
4462         for (my $i = $from; $i <= $to; $i++) {
4463                 my $entry = $headlist->[$i];
4464                 my %ref = %$entry;
4465                 my $curr = $ref{'id'} eq $head;
4466                 if ($alternate) {
4467                         print "<tr class=\"dark\">\n";
4468                 } else {
4469                         print "<tr class=\"light\">\n";
4470                 }
4471                 $alternate ^= 1;
4472                 print "<td><i>$ref{'age'}</i></td>\n" .
4473                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4474                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4475                                -class => "list name"},esc_html($ref{'name'})) .
4476                       "</td>\n" .
4477                       "<td class=\"link\">" .
4478                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4479                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4480                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4481                       "</td>\n" .
4482                       "</tr>";
4483         }
4484         if (defined $extra) {
4485                 print "<tr>\n" .
4486                       "<td colspan=\"3\">$extra</td>\n" .
4487                       "</tr>\n";
4488         }
4489         print "</table>\n";
4490 }
4491
4492 sub git_search_grep_body {
4493         my ($commitlist, $from, $to, $extra) = @_;
4494         $from = 0 unless defined $from;
4495         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4496
4497         print "<table class=\"commit_search\">\n";
4498         my $alternate = 1;
4499         for (my $i = $from; $i <= $to; $i++) {
4500                 my %co = %{$commitlist->[$i]};
4501                 if (!%co) {
4502                         next;
4503                 }
4504                 my $commit = $co{'id'};
4505                 if ($alternate) {
4506                         print "<tr class=\"dark\">\n";
4507                 } else {
4508                         print "<tr class=\"light\">\n";
4509                 }
4510                 $alternate ^= 1;
4511                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4512                       format_author_html('td', \%co, 15, 5) .
4513                       "<td>" .
4514                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4515                                -class => "list subject"},
4516                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4517                 my $comment = $co{'comment'};
4518                 foreach my $line (@$comment) {
4519                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4520                                 my ($lead, $match, $trail) = ($1, $2, $3);
4521                                 $match = chop_str($match, 70, 5, 'center');
4522                                 my $contextlen = int((80 - length($match))/2);
4523                                 $contextlen = 30 if ($contextlen > 30);
4524                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4525                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4526
4527                                 $lead  = esc_html($lead);
4528                                 $match = esc_html($match);
4529                                 $trail = esc_html($trail);
4530
4531                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4532                         }
4533                 }
4534                 print "</td>\n" .
4535                       "<td class=\"link\">" .
4536                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4537                       " | " .
4538                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4539                       " | " .
4540                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4541                 print "</td>\n" .
4542                       "</tr>\n";
4543         }
4544         if (defined $extra) {
4545                 print "<tr>\n" .
4546                       "<td colspan=\"3\">$extra</td>\n" .
4547                       "</tr>\n";
4548         }
4549         print "</table>\n";
4550 }
4551
4552 ## ======================================================================
4553 ## ======================================================================
4554 ## actions
4555
4556 sub git_project_list {
4557         my $order = $input_params{'order'};
4558         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4559                 die_error(400, "Unknown order parameter");
4560         }
4561
4562         my @list = git_get_projects_list();
4563         if (!@list) {
4564                 die_error(404, "No projects found");
4565         }
4566
4567         git_header_html();
4568         if (-f $home_text) {
4569                 print "<div class=\"index_include\">\n";
4570                 insert_file($home_text);
4571                 print "</div>\n";
4572         }
4573         print $cgi->startform(-method => "get") .
4574               "<p class=\"projsearch\">Search:\n" .
4575               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4576               "</p>" .
4577               $cgi->end_form() . "\n";
4578         git_project_list_body(\@list, $order);
4579         git_footer_html();
4580 }
4581
4582 sub git_forks {
4583         my $order = $input_params{'order'};
4584         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4585                 die_error(400, "Unknown order parameter");
4586         }
4587
4588         my @list = git_get_projects_list($project);
4589         if (!@list) {
4590                 die_error(404, "No forks found");
4591         }
4592
4593         git_header_html();
4594         git_print_page_nav('','');
4595         git_print_header_div('summary', "$project forks");
4596         git_project_list_body(\@list, $order);
4597         git_footer_html();
4598 }
4599
4600 sub git_project_index {
4601         my @projects = git_get_projects_list($project);
4602
4603         print $cgi->header(
4604                 -type => 'text/plain',
4605                 -charset => 'utf-8',
4606                 -content_disposition => 'inline; filename="index.aux"');
4607
4608         foreach my $pr (@projects) {
4609                 if (!exists $pr->{'owner'}) {
4610                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4611                 }
4612
4613                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4614                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4615                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4616                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4617                 $path  =~ s/ /\+/g;
4618                 $owner =~ s/ /\+/g;
4619
4620                 print "$path $owner\n";
4621         }
4622 }
4623
4624 sub git_summary {
4625         my $descr = git_get_project_description($project) || "none";
4626         my %co = parse_commit("HEAD");
4627         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4628         my $head = $co{'id'};
4629
4630         my $owner = git_get_project_owner($project);
4631
4632         my $refs = git_get_references();
4633         # These get_*_list functions return one more to allow us to see if
4634         # there are more ...
4635         my @taglist  = git_get_tags_list(16);
4636         my @headlist = git_get_heads_list(16);
4637         my @forklist;
4638         my $check_forks = gitweb_check_feature('forks');
4639
4640         if ($check_forks) {
4641                 @forklist = git_get_projects_list($project);
4642         }
4643
4644         git_header_html();
4645         git_print_page_nav('summary','', $head);
4646
4647         print "<div class=\"title\">&nbsp;</div>\n";
4648         print "<table class=\"projects_list\">\n" .
4649               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4650               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4651         if (defined $cd{'rfc2822'}) {
4652                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4653         }
4654
4655         # use per project git URL list in $projectroot/$project/cloneurl
4656         # or make project git URL from git base URL and project name
4657         my $url_tag = "URL";
4658         my @url_list = git_get_project_url_list($project);
4659         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4660         foreach my $git_url (@url_list) {
4661                 next unless $git_url;
4662                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4663                 $url_tag = "";
4664         }
4665
4666         # Tag cloud
4667         my $show_ctags = gitweb_check_feature('ctags');
4668         if ($show_ctags) {
4669                 my $ctags = git_get_project_ctags($project);
4670                 my $cloud = git_populate_project_tagcloud($ctags);
4671                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4672                 print "</td>\n<td>" unless %$ctags;
4673                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4674                 print "</td>\n<td>" if %$ctags;
4675                 print git_show_project_tagcloud($cloud, 48);
4676                 print "</td></tr>";
4677         }
4678
4679         print "</table>\n";
4680
4681         # If XSS prevention is on, we don't include README.html.
4682         # TODO: Allow a readme in some safe format.
4683         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4684                 print "<div class=\"title\">readme</div>\n" .
4685                       "<div class=\"readme\">\n";
4686                 insert_file("$projectroot/$project/README.html");
4687                 print "\n</div>\n"; # class="readme"
4688         }
4689
4690         # we need to request one more than 16 (0..15) to check if
4691         # those 16 are all
4692         my @commitlist = $head ? parse_commits($head, 17) : ();
4693         if (@commitlist) {
4694                 git_print_header_div('shortlog');
4695                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4696                                   $#commitlist <=  15 ? undef :
4697                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4698         }
4699
4700         if (@taglist) {
4701                 git_print_header_div('tags');
4702                 git_tags_body(\@taglist, 0, 15,
4703                               $#taglist <=  15 ? undef :
4704                               $cgi->a({-href => href(action=>"tags")}, "..."));
4705         }
4706
4707         if (@headlist) {
4708                 git_print_header_div('heads');
4709                 git_heads_body(\@headlist, $head, 0, 15,
4710                                $#headlist <= 15 ? undef :
4711                                $cgi->a({-href => href(action=>"heads")}, "..."));
4712         }
4713
4714         if (@forklist) {
4715                 git_print_header_div('forks');
4716                 git_project_list_body(\@forklist, 'age', 0, 15,
4717                                       $#forklist <= 15 ? undef :
4718                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4719                                       'no_header');
4720         }
4721
4722         git_footer_html();
4723 }
4724
4725 sub git_tag {
4726         my $head = git_get_head_hash($project);
4727         git_header_html();
4728         git_print_page_nav('','', $head,undef,$head);
4729         my %tag = parse_tag($hash);
4730
4731         if (! %tag) {
4732                 die_error(404, "Unknown tag object");
4733         }
4734
4735         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4736         print "<div class=\"title_text\">\n" .
4737               "<table class=\"object_header\">\n" .
4738               "<tr>\n" .
4739               "<td>object</td>\n" .
4740               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4741                                $tag{'object'}) . "</td>\n" .
4742               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4743                                               $tag{'type'}) . "</td>\n" .
4744               "</tr>\n";
4745         if (defined($tag{'author'})) {
4746                 git_print_authorship_rows(\%tag, 'author');
4747         }
4748         print "</table>\n\n" .
4749               "</div>\n";
4750         print "<div class=\"page_body\">";
4751         my $comment = $tag{'comment'};
4752         foreach my $line (@$comment) {
4753                 chomp $line;
4754                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4755         }
4756         print "</div>\n";
4757         git_footer_html();
4758 }
4759
4760 sub git_blame {
4761         # permissions
4762         gitweb_check_feature('blame')
4763                 or die_error(403, "Blame view not allowed");
4764
4765         # error checking
4766         die_error(400, "No file name given") unless $file_name;
4767         $hash_base ||= git_get_head_hash($project);
4768         die_error(404, "Couldn't find base commit") unless $hash_base;
4769         my %co = parse_commit($hash_base)
4770                 or die_error(404, "Commit not found");
4771         my $ftype = "blob";
4772         if (!defined $hash) {
4773                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4774                         or die_error(404, "Error looking up file");
4775         } else {
4776                 $ftype = git_get_type($hash);
4777                 if ($ftype !~ "blob") {
4778                         die_error(400, "Object is not a blob");
4779                 }
4780         }
4781
4782         # run git-blame --porcelain
4783         open my $fd, "-|", git_cmd(), "blame", '-p',
4784                 $hash_base, '--', $file_name
4785                 or die_error(500, "Open git-blame failed");
4786
4787         # page header
4788         git_header_html();
4789         my $formats_nav =
4790                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4791                         "blob") .
4792                 " | " .
4793                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4794                         "history") .
4795                 " | " .
4796                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4797                         "HEAD");
4798         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4799         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4800         git_print_page_path($file_name, $ftype, $hash_base);
4801
4802         # page body
4803         my @rev_color = qw(light2 dark2);
4804         my $num_colors = scalar(@rev_color);
4805         my $current_color = 0;
4806         my %metainfo = ();
4807
4808         print <<HTML;
4809 <div class="page_body">
4810 <table class="blame">
4811 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4812 HTML
4813  LINE:
4814         while (my $line = <$fd>) {
4815                 chomp $line;
4816                 # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
4817                 # no <lines in group> for subsequent lines in group of lines
4818                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4819                    ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
4820                 if (!exists $metainfo{$full_rev}) {
4821                         $metainfo{$full_rev} = {};
4822                 }
4823                 my $meta = $metainfo{$full_rev};
4824                 my $data;
4825                 while ($data = <$fd>) {
4826                         chomp $data;
4827                         last if ($data =~ s/^\t//); # contents of line
4828                         if ($data =~ /^(\S+) (.*)$/) {
4829                                 $meta->{$1} = $2;
4830                         }
4831                 }
4832                 my $short_rev = substr($full_rev, 0, 8);
4833                 my $author = $meta->{'author'};
4834                 my %date =
4835                         parse_date($meta->{'author-time'}, $meta->{'author-tz'});
4836                 my $date = $date{'iso-tz'};
4837                 if ($group_size) {
4838                         $current_color = ($current_color + 1) % $num_colors;
4839                 }
4840                 print "<tr id=\"l$lineno\" class=\"$rev_color[$current_color]\">\n";
4841                 if ($group_size) {
4842                         print "<td class=\"sha1\"";
4843                         print " title=\"". esc_html($author) . ", $date\"";
4844                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4845                         print ">";
4846                         print $cgi->a({-href => href(action=>"commit",
4847                                                      hash=>$full_rev,
4848                                                      file_name=>$file_name)},
4849                                       esc_html($short_rev));
4850                         print "</td>\n";
4851                 }
4852                 my $parent_commit;
4853                 if (!exists $meta->{'parent'}) {
4854                         open (my $dd, "-|", git_cmd(), "rev-parse", "$full_rev^")
4855                                 or die_error(500, "Open git-rev-parse failed");
4856                         $parent_commit = <$dd>;
4857                         close $dd;
4858                         chomp($parent_commit);
4859                         $meta->{'parent'} = $parent_commit;
4860                 } else {
4861                         $parent_commit = $meta->{'parent'};
4862                 }
4863                 my $blamed = href(action => 'blame',
4864                                   file_name => $meta->{'filename'},
4865                                   hash_base => $parent_commit);
4866                 print "<td class=\"linenr\">";
4867                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4868                                 -class => "linenr" },
4869                               esc_html($lineno));
4870                 print "</td>";
4871                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4872                 print "</tr>\n";
4873         }
4874         print "</table>\n";
4875         print "</div>";
4876         close $fd
4877                 or print "Reading blob failed\n";
4878
4879         # page footer
4880         git_footer_html();
4881 }
4882
4883 sub git_tags {
4884         my $head = git_get_head_hash($project);
4885         git_header_html();
4886         git_print_page_nav('','', $head,undef,$head);
4887         git_print_header_div('summary', $project);
4888
4889         my @tagslist = git_get_tags_list();
4890         if (@tagslist) {
4891                 git_tags_body(\@tagslist);
4892         }
4893         git_footer_html();
4894 }
4895
4896 sub git_heads {
4897         my $head = git_get_head_hash($project);
4898         git_header_html();
4899         git_print_page_nav('','', $head,undef,$head);
4900         git_print_header_div('summary', $project);
4901
4902         my @headslist = git_get_heads_list();
4903         if (@headslist) {
4904                 git_heads_body(\@headslist, $head);
4905         }
4906         git_footer_html();
4907 }
4908
4909 sub git_blob_plain {
4910         my $type = shift;
4911         my $expires;
4912
4913         if (!defined $hash) {
4914                 if (defined $file_name) {
4915                         my $base = $hash_base || git_get_head_hash($project);
4916                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4917                                 or die_error(404, "Cannot find file");
4918                 } else {
4919                         die_error(400, "No file name defined");
4920                 }
4921         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4922                 # blobs defined by non-textual hash id's can be cached
4923                 $expires = "+1d";
4924         }
4925
4926         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4927                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4928
4929         # content-type (can include charset)
4930         $type = blob_contenttype($fd, $file_name, $type);
4931
4932         # "save as" filename, even when no $file_name is given
4933         my $save_as = "$hash";
4934         if (defined $file_name) {
4935                 $save_as = $file_name;
4936         } elsif ($type =~ m/^text\//) {
4937                 $save_as .= '.txt';
4938         }
4939
4940         # With XSS prevention on, blobs of all types except a few known safe
4941         # ones are served with "Content-Disposition: attachment" to make sure
4942         # they don't run in our security domain.  For certain image types,
4943         # blob view writes an <img> tag referring to blob_plain view, and we
4944         # want to be sure not to break that by serving the image as an
4945         # attachment (though Firefox 3 doesn't seem to care).
4946         my $sandbox = $prevent_xss &&
4947                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
4948
4949         print $cgi->header(
4950                 -type => $type,
4951                 -expires => $expires,
4952                 -content_disposition =>
4953                         ($sandbox ? 'attachment' : 'inline')
4954                         . '; filename="' . $save_as . '"');
4955         local $/ = undef;
4956         binmode STDOUT, ':raw';
4957         print <$fd>;
4958         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4959         close $fd;
4960 }
4961
4962 sub git_blob {
4963         my $expires;
4964
4965         if (!defined $hash) {
4966                 if (defined $file_name) {
4967                         my $base = $hash_base || git_get_head_hash($project);
4968                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4969                                 or die_error(404, "Cannot find file");
4970                 } else {
4971                         die_error(400, "No file name defined");
4972                 }
4973         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4974                 # blobs defined by non-textual hash id's can be cached
4975                 $expires = "+1d";
4976         }
4977
4978         my $have_blame = gitweb_check_feature('blame');
4979         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4980                 or die_error(500, "Couldn't cat $file_name, $hash");
4981         my $mimetype = blob_mimetype($fd, $file_name);
4982         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
4983                 close $fd;
4984                 return git_blob_plain($mimetype);
4985         }
4986         # we can have blame only for text/* mimetype
4987         $have_blame &&= ($mimetype =~ m!^text/!);
4988
4989         git_header_html(undef, $expires);
4990         my $formats_nav = '';
4991         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
4992                 if (defined $file_name) {
4993                         if ($have_blame) {
4994                                 $formats_nav .=
4995                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
4996                                                 "blame") .
4997                                         " | ";
4998                         }
4999                         $formats_nav .=
5000                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5001                                         "history") .
5002                                 " | " .
5003                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5004                                         "raw") .
5005                                 " | " .
5006                                 $cgi->a({-href => href(action=>"blob",
5007                                                        hash_base=>"HEAD", file_name=>$file_name)},
5008                                         "HEAD");
5009                 } else {
5010                         $formats_nav .=
5011                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5012                                         "raw");
5013                 }
5014                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5015                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5016         } else {
5017                 print "<div class=\"page_nav\">\n" .
5018                       "<br/><br/></div>\n" .
5019                       "<div class=\"title\">$hash</div>\n";
5020         }
5021         git_print_page_path($file_name, "blob", $hash_base);
5022         print "<div class=\"page_body\">\n";
5023         if ($mimetype =~ m!^image/!) {
5024                 print qq!<img type="$mimetype"!;
5025                 if ($file_name) {
5026                         print qq! alt="$file_name" title="$file_name"!;
5027                 }
5028                 print qq! src="! .
5029                       href(action=>"blob_plain", hash=>$hash,
5030                            hash_base=>$hash_base, file_name=>$file_name) .
5031                       qq!" />\n!;
5032         } else {
5033                 my $nr;
5034                 while (my $line = <$fd>) {
5035                         chomp $line;
5036                         $nr++;
5037                         $line = untabify($line);
5038                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
5039                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
5040                 }
5041         }
5042         close $fd
5043                 or print "Reading blob failed.\n";
5044         print "</div>";
5045         git_footer_html();
5046 }
5047
5048 sub git_tree {
5049         if (!defined $hash_base) {
5050                 $hash_base = "HEAD";
5051         }
5052         if (!defined $hash) {
5053                 if (defined $file_name) {
5054                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5055                 } else {
5056                         $hash = $hash_base;
5057                 }
5058         }
5059         die_error(404, "No such tree") unless defined($hash);
5060
5061         my @entries = ();
5062         {
5063                 local $/ = "\0";
5064                 open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
5065                         or die_error(500, "Open git-ls-tree failed");
5066                 @entries = map { chomp; $_ } <$fd>;
5067                 close $fd
5068                         or die_error(404, "Reading tree failed");
5069         }
5070
5071         my $refs = git_get_references();
5072         my $ref = format_ref_marker($refs, $hash_base);
5073         git_header_html();
5074         my $basedir = '';
5075         my $have_blame = gitweb_check_feature('blame');
5076         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5077                 my @views_nav = ();
5078                 if (defined $file_name) {
5079                         push @views_nav,
5080                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5081                                         "history"),
5082                                 $cgi->a({-href => href(action=>"tree",
5083                                                        hash_base=>"HEAD", file_name=>$file_name)},
5084                                         "HEAD"),
5085                 }
5086                 my $snapshot_links = format_snapshot_links($hash);
5087                 if (defined $snapshot_links) {
5088                         # FIXME: Should be available when we have no hash base as well.
5089                         push @views_nav, $snapshot_links;
5090                 }
5091                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
5092                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5093         } else {
5094                 undef $hash_base;
5095                 print "<div class=\"page_nav\">\n";
5096                 print "<br/><br/></div>\n";
5097                 print "<div class=\"title\">$hash</div>\n";
5098         }
5099         if (defined $file_name) {
5100                 $basedir = $file_name;
5101                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5102                         $basedir .= '/';
5103                 }
5104                 git_print_page_path($file_name, 'tree', $hash_base);
5105         }
5106         print "<div class=\"page_body\">\n";
5107         print "<table class=\"tree\">\n";
5108         my $alternate = 1;
5109         # '..' (top directory) link if possible
5110         if (defined $hash_base &&
5111             defined $file_name && $file_name =~ m![^/]+$!) {
5112                 if ($alternate) {
5113                         print "<tr class=\"dark\">\n";
5114                 } else {
5115                         print "<tr class=\"light\">\n";
5116                 }
5117                 $alternate ^= 1;
5118
5119                 my $up = $file_name;
5120                 $up =~ s!/?[^/]+$!!;
5121                 undef $up unless $up;
5122                 # based on git_print_tree_entry
5123                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5124                 print '<td class="list">';
5125                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
5126                                              file_name=>$up)},
5127                               "..");
5128                 print "</td>\n";
5129                 print "<td class=\"link\"></td>\n";
5130
5131                 print "</tr>\n";
5132         }
5133         foreach my $line (@entries) {
5134                 my %t = parse_ls_tree_line($line, -z => 1);
5135
5136                 if ($alternate) {
5137                         print "<tr class=\"dark\">\n";
5138                 } else {
5139                         print "<tr class=\"light\">\n";
5140                 }
5141                 $alternate ^= 1;
5142
5143                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5144
5145                 print "</tr>\n";
5146         }
5147         print "</table>\n" .
5148               "</div>";
5149         git_footer_html();
5150 }
5151
5152 sub git_snapshot {
5153         my $format = $input_params{'snapshot_format'};
5154         if (!@snapshot_fmts) {
5155                 die_error(403, "Snapshots not allowed");
5156         }
5157         # default to first supported snapshot format
5158         $format ||= $snapshot_fmts[0];
5159         if ($format !~ m/^[a-z0-9]+$/) {
5160                 die_error(400, "Invalid snapshot format parameter");
5161         } elsif (!exists($known_snapshot_formats{$format})) {
5162                 die_error(400, "Unknown snapshot format");
5163         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5164                 die_error(403, "Unsupported snapshot format");
5165         }
5166
5167         if (!defined $hash) {
5168                 $hash = git_get_head_hash($project);
5169         }
5170
5171         my $name = $project;
5172         $name =~ s,([^/])/*\.git$,$1,;
5173         $name = basename($name);
5174         my $filename = to_utf8($name);
5175         $name =~ s/\047/\047\\\047\047/g;
5176         my $cmd;
5177         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
5178         $cmd = quote_command(
5179                 git_cmd(), 'archive',
5180                 "--format=$known_snapshot_formats{$format}{'format'}",
5181                 "--prefix=$name/", $hash);
5182         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5183                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5184         }
5185
5186         print $cgi->header(
5187                 -type => $known_snapshot_formats{$format}{'type'},
5188                 -content_disposition => 'inline; filename="' . "$filename" . '"',
5189                 -status => '200 OK');
5190
5191         open my $fd, "-|", $cmd
5192                 or die_error(500, "Execute git-archive failed");
5193         binmode STDOUT, ':raw';
5194         print <$fd>;
5195         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5196         close $fd;
5197 }
5198
5199 sub git_log {
5200         my $head = git_get_head_hash($project);
5201         if (!defined $hash) {
5202                 $hash = $head;
5203         }
5204         if (!defined $page) {
5205                 $page = 0;
5206         }
5207         my $refs = git_get_references();
5208
5209         my @commitlist = parse_commits($hash, 101, (100 * $page));
5210
5211         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
5212
5213         my ($patch_max) = gitweb_get_feature('patches');
5214         if ($patch_max) {
5215                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5216                         $paging_nav .= " &sdot; " .
5217                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5218                                         "patches");
5219                 }
5220         }
5221
5222         git_header_html();
5223         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5224
5225         if (!@commitlist) {
5226                 my %co = parse_commit($hash);
5227
5228                 git_print_header_div('summary', $project);
5229                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5230         }
5231         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5232         for (my $i = 0; $i <= $to; $i++) {
5233                 my %co = %{$commitlist[$i]};
5234                 next if !%co;
5235                 my $commit = $co{'id'};
5236                 my $ref = format_ref_marker($refs, $commit);
5237                 my %ad = parse_date($co{'author_epoch'});
5238                 git_print_header_div('commit',
5239                                "<span class=\"age\">$co{'age_string'}</span>" .
5240                                esc_html($co{'title'}) . $ref,
5241                                $commit);
5242                 print "<div class=\"title_text\">\n" .
5243                       "<div class=\"log_link\">\n" .
5244                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5245                       " | " .
5246                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5247                       " | " .
5248                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5249                       "<br/>\n" .
5250                       "</div>\n";
5251                       git_print_authorship(\%co, -tag => 'span');
5252                       print "<br/>\n</div>\n";
5253
5254                 print "<div class=\"log_body\">\n";
5255                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5256                 print "</div>\n";
5257         }
5258         if ($#commitlist >= 100) {
5259                 print "<div class=\"page_nav\">\n";
5260                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5261                                -accesskey => "n", -title => "Alt-n"}, "next");
5262                 print "</div>\n";
5263         }
5264         git_footer_html();
5265 }
5266
5267 sub git_commit {
5268         $hash ||= $hash_base || "HEAD";
5269         my %co = parse_commit($hash)
5270             or die_error(404, "Unknown commit object");
5271
5272         my $parent  = $co{'parent'};
5273         my $parents = $co{'parents'}; # listref
5274
5275         # we need to prepare $formats_nav before any parameter munging
5276         my $formats_nav;
5277         if (!defined $parent) {
5278                 # --root commitdiff
5279                 $formats_nav .= '(initial)';
5280         } elsif (@$parents == 1) {
5281                 # single parent commit
5282                 $formats_nav .=
5283                         '(parent: ' .
5284                         $cgi->a({-href => href(action=>"commit",
5285                                                hash=>$parent)},
5286                                 esc_html(substr($parent, 0, 7))) .
5287                         ')';
5288         } else {
5289                 # merge commit
5290                 $formats_nav .=
5291                         '(merge: ' .
5292                         join(' ', map {
5293                                 $cgi->a({-href => href(action=>"commit",
5294                                                        hash=>$_)},
5295                                         esc_html(substr($_, 0, 7)));
5296                         } @$parents ) .
5297                         ')';
5298         }
5299         if (gitweb_check_feature('patches')) {
5300                 $formats_nav .= " | " .
5301                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5302                                 "patch");
5303         }
5304
5305         if (!defined $parent) {
5306                 $parent = "--root";
5307         }
5308         my @difftree;
5309         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5310                 @diff_opts,
5311                 (@$parents <= 1 ? $parent : '-c'),
5312                 $hash, "--"
5313                 or die_error(500, "Open git-diff-tree failed");
5314         @difftree = map { chomp; $_ } <$fd>;
5315         close $fd or die_error(404, "Reading git-diff-tree failed");
5316
5317         # non-textual hash id's can be cached
5318         my $expires;
5319         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5320                 $expires = "+1d";
5321         }
5322         my $refs = git_get_references();
5323         my $ref = format_ref_marker($refs, $co{'id'});
5324
5325         git_header_html(undef, $expires);
5326         git_print_page_nav('commit', '',
5327                            $hash, $co{'tree'}, $hash,
5328                            $formats_nav);
5329
5330         if (defined $co{'parent'}) {
5331                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5332         } else {
5333                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5334         }
5335         print "<div class=\"title_text\">\n" .
5336               "<table class=\"object_header\">\n";
5337         git_print_authorship_rows(\%co);
5338         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5339         print "<tr>" .
5340               "<td>tree</td>" .
5341               "<td class=\"sha1\">" .
5342               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5343                        class => "list"}, $co{'tree'}) .
5344               "</td>" .
5345               "<td class=\"link\">" .
5346               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5347                       "tree");
5348         my $snapshot_links = format_snapshot_links($hash);
5349         if (defined $snapshot_links) {
5350                 print " | " . $snapshot_links;
5351         }
5352         print "</td>" .
5353               "</tr>\n";
5354
5355         foreach my $par (@$parents) {
5356                 print "<tr>" .
5357                       "<td>parent</td>" .
5358                       "<td class=\"sha1\">" .
5359                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5360                                class => "list"}, $par) .
5361                       "</td>" .
5362                       "<td class=\"link\">" .
5363                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5364                       " | " .
5365                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5366                       "</td>" .
5367                       "</tr>\n";
5368         }
5369         print "</table>".
5370               "</div>\n";
5371
5372         print "<div class=\"page_body\">\n";
5373         git_print_log($co{'comment'});
5374         print "</div>\n";
5375
5376         git_difftree_body(\@difftree, $hash, @$parents);
5377
5378         git_footer_html();
5379 }
5380
5381 sub git_object {
5382         # object is defined by:
5383         # - hash or hash_base alone
5384         # - hash_base and file_name
5385         my $type;
5386
5387         # - hash or hash_base alone
5388         if ($hash || ($hash_base && !defined $file_name)) {
5389                 my $object_id = $hash || $hash_base;
5390
5391                 open my $fd, "-|", quote_command(
5392                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5393                         or die_error(404, "Object does not exist");
5394                 $type = <$fd>;
5395                 chomp $type;
5396                 close $fd
5397                         or die_error(404, "Object does not exist");
5398
5399         # - hash_base and file_name
5400         } elsif ($hash_base && defined $file_name) {
5401                 $file_name =~ s,/+$,,;
5402
5403                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5404                         or die_error(404, "Base object does not exist");
5405
5406                 # here errors should not hapen
5407                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5408                         or die_error(500, "Open git-ls-tree failed");
5409                 my $line = <$fd>;
5410                 close $fd;
5411
5412                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5413                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5414                         die_error(404, "File or directory for given base does not exist");
5415                 }
5416                 $type = $2;
5417                 $hash = $3;
5418         } else {
5419                 die_error(400, "Not enough information to find object");
5420         }
5421
5422         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5423                                           hash=>$hash, hash_base=>$hash_base,
5424                                           file_name=>$file_name),
5425                              -status => '302 Found');
5426 }
5427
5428 sub git_blobdiff {
5429         my $format = shift || 'html';
5430
5431         my $fd;
5432         my @difftree;
5433         my %diffinfo;
5434         my $expires;
5435
5436         # preparing $fd and %diffinfo for git_patchset_body
5437         # new style URI
5438         if (defined $hash_base && defined $hash_parent_base) {
5439                 if (defined $file_name) {
5440                         # read raw output
5441                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5442                                 $hash_parent_base, $hash_base,
5443                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5444                                 or die_error(500, "Open git-diff-tree failed");
5445                         @difftree = map { chomp; $_ } <$fd>;
5446                         close $fd
5447                                 or die_error(404, "Reading git-diff-tree failed");
5448                         @difftree
5449                                 or die_error(404, "Blob diff not found");
5450
5451                 } elsif (defined $hash &&
5452                          $hash =~ /[0-9a-fA-F]{40}/) {
5453                         # try to find filename from $hash
5454
5455                         # read filtered raw output
5456                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5457                                 $hash_parent_base, $hash_base, "--"
5458                                 or die_error(500, "Open git-diff-tree failed");
5459                         @difftree =
5460                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5461                                 # $hash == to_id
5462                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5463                                 map { chomp; $_ } <$fd>;
5464                         close $fd
5465                                 or die_error(404, "Reading git-diff-tree failed");
5466                         @difftree
5467                                 or die_error(404, "Blob diff not found");
5468
5469                 } else {
5470                         die_error(400, "Missing one of the blob diff parameters");
5471                 }
5472
5473                 if (@difftree > 1) {
5474                         die_error(400, "Ambiguous blob diff specification");
5475                 }
5476
5477                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5478                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5479                 $file_name   ||= $diffinfo{'to_file'};
5480
5481                 $hash_parent ||= $diffinfo{'from_id'};
5482                 $hash        ||= $diffinfo{'to_id'};
5483
5484                 # non-textual hash id's can be cached
5485                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5486                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5487                         $expires = '+1d';
5488                 }
5489
5490                 # open patch output
5491                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5492                         '-p', ($format eq 'html' ? "--full-index" : ()),
5493                         $hash_parent_base, $hash_base,
5494                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5495                         or die_error(500, "Open git-diff-tree failed");
5496         }
5497
5498         # old/legacy style URI -- not generated anymore since 1.4.3.
5499         if (!%diffinfo) {
5500                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5501         }
5502
5503         # header
5504         if ($format eq 'html') {
5505                 my $formats_nav =
5506                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5507                                 "raw");
5508                 git_header_html(undef, $expires);
5509                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5510                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5511                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5512                 } else {
5513                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5514                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5515                 }
5516                 if (defined $file_name) {
5517                         git_print_page_path($file_name, "blob", $hash_base);
5518                 } else {
5519                         print "<div class=\"page_path\"></div>\n";
5520                 }
5521
5522         } elsif ($format eq 'plain') {
5523                 print $cgi->header(
5524                         -type => 'text/plain',
5525                         -charset => 'utf-8',
5526                         -expires => $expires,
5527                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5528
5529                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5530
5531         } else {
5532                 die_error(400, "Unknown blobdiff format");
5533         }
5534
5535         # patch
5536         if ($format eq 'html') {
5537                 print "<div class=\"page_body\">\n";
5538
5539                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5540                 close $fd;
5541
5542                 print "</div>\n"; # class="page_body"
5543                 git_footer_html();
5544
5545         } else {
5546                 while (my $line = <$fd>) {
5547                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5548                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5549
5550                         print $line;
5551
5552                         last if $line =~ m!^\+\+\+!;
5553                 }
5554                 local $/ = undef;
5555                 print <$fd>;
5556                 close $fd;
5557         }
5558 }
5559
5560 sub git_blobdiff_plain {
5561         git_blobdiff('plain');
5562 }
5563
5564 sub git_commitdiff {
5565         my %params = @_;
5566         my $format = $params{-format} || 'html';
5567
5568         my ($patch_max) = gitweb_get_feature('patches');
5569         if ($format eq 'patch') {
5570                 die_error(403, "Patch view not allowed") unless $patch_max;
5571         }
5572
5573         $hash ||= $hash_base || "HEAD";
5574         my %co = parse_commit($hash)
5575             or die_error(404, "Unknown commit object");
5576
5577         # choose format for commitdiff for merge
5578         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5579                 $hash_parent = '--cc';
5580         }
5581         # we need to prepare $formats_nav before almost any parameter munging
5582         my $formats_nav;
5583         if ($format eq 'html') {
5584                 $formats_nav =
5585                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5586                                 "raw");
5587                 if ($patch_max) {
5588                         $formats_nav .= " | " .
5589                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5590                                         "patch");
5591                 }
5592
5593                 if (defined $hash_parent &&
5594                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5595                         # commitdiff with two commits given
5596                         my $hash_parent_short = $hash_parent;
5597                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5598                                 $hash_parent_short = substr($hash_parent, 0, 7);
5599                         }
5600                         $formats_nav .=
5601                                 ' (from';
5602                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5603                                 if ($co{'parents'}[$i] eq $hash_parent) {
5604                                         $formats_nav .= ' parent ' . ($i+1);
5605                                         last;
5606                                 }
5607                         }
5608                         $formats_nav .= ': ' .
5609                                 $cgi->a({-href => href(action=>"commitdiff",
5610                                                        hash=>$hash_parent)},
5611                                         esc_html($hash_parent_short)) .
5612                                 ')';
5613                 } elsif (!$co{'parent'}) {
5614                         # --root commitdiff
5615                         $formats_nav .= ' (initial)';
5616                 } elsif (scalar @{$co{'parents'}} == 1) {
5617                         # single parent commit
5618                         $formats_nav .=
5619                                 ' (parent: ' .
5620                                 $cgi->a({-href => href(action=>"commitdiff",
5621                                                        hash=>$co{'parent'})},
5622                                         esc_html(substr($co{'parent'}, 0, 7))) .
5623                                 ')';
5624                 } else {
5625                         # merge commit
5626                         if ($hash_parent eq '--cc') {
5627                                 $formats_nav .= ' | ' .
5628                                         $cgi->a({-href => href(action=>"commitdiff",
5629                                                                hash=>$hash, hash_parent=>'-c')},
5630                                                 'combined');
5631                         } else { # $hash_parent eq '-c'
5632                                 $formats_nav .= ' | ' .
5633                                         $cgi->a({-href => href(action=>"commitdiff",
5634                                                                hash=>$hash, hash_parent=>'--cc')},
5635                                                 'compact');
5636                         }
5637                         $formats_nav .=
5638                                 ' (merge: ' .
5639                                 join(' ', map {
5640                                         $cgi->a({-href => href(action=>"commitdiff",
5641                                                                hash=>$_)},
5642                                                 esc_html(substr($_, 0, 7)));
5643                                 } @{$co{'parents'}} ) .
5644                                 ')';
5645                 }
5646         }
5647
5648         my $hash_parent_param = $hash_parent;
5649         if (!defined $hash_parent_param) {
5650                 # --cc for multiple parents, --root for parentless
5651                 $hash_parent_param =
5652                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5653         }
5654
5655         # read commitdiff
5656         my $fd;
5657         my @difftree;
5658         if ($format eq 'html') {
5659                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5660                         "--no-commit-id", "--patch-with-raw", "--full-index",
5661                         $hash_parent_param, $hash, "--"
5662                         or die_error(500, "Open git-diff-tree failed");
5663
5664                 while (my $line = <$fd>) {
5665                         chomp $line;
5666                         # empty line ends raw part of diff-tree output
5667                         last unless $line;
5668                         push @difftree, scalar parse_difftree_raw_line($line);
5669                 }
5670
5671         } elsif ($format eq 'plain') {
5672                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5673                         '-p', $hash_parent_param, $hash, "--"
5674                         or die_error(500, "Open git-diff-tree failed");
5675         } elsif ($format eq 'patch') {
5676                 # For commit ranges, we limit the output to the number of
5677                 # patches specified in the 'patches' feature.
5678                 # For single commits, we limit the output to a single patch,
5679                 # diverging from the git-format-patch default.
5680                 my @commit_spec = ();
5681                 if ($hash_parent) {
5682                         if ($patch_max > 0) {
5683                                 push @commit_spec, "-$patch_max";
5684                         }
5685                         push @commit_spec, '-n', "$hash_parent..$hash";
5686                 } else {
5687                         if ($params{-single}) {
5688                                 push @commit_spec, '-1';
5689                         } else {
5690                                 if ($patch_max > 0) {
5691                                         push @commit_spec, "-$patch_max";
5692                                 }
5693                                 push @commit_spec, "-n";
5694                         }
5695                         push @commit_spec, '--root', $hash;
5696                 }
5697                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5698                         '--stdout', @commit_spec
5699                         or die_error(500, "Open git-format-patch failed");
5700         } else {
5701                 die_error(400, "Unknown commitdiff format");
5702         }
5703
5704         # non-textual hash id's can be cached
5705         my $expires;
5706         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5707                 $expires = "+1d";
5708         }
5709
5710         # write commit message
5711         if ($format eq 'html') {
5712                 my $refs = git_get_references();
5713                 my $ref = format_ref_marker($refs, $co{'id'});
5714
5715                 git_header_html(undef, $expires);
5716                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5717                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5718                 print "<div class=\"title_text\">\n" .
5719                       "<table class=\"object_header\">\n";
5720                 git_print_authorship_rows(\%co);
5721                 print "</table>".
5722                       "</div>\n";
5723                 print "<div class=\"page_body\">\n";
5724                 if (@{$co{'comment'}} > 1) {
5725                         print "<div class=\"log\">\n";
5726                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5727                         print "</div>\n"; # class="log"
5728                 }
5729
5730         } elsif ($format eq 'plain') {
5731                 my $refs = git_get_references("tags");
5732                 my $tagname = git_get_rev_name_tags($hash);
5733                 my $filename = basename($project) . "-$hash.patch";
5734
5735                 print $cgi->header(
5736                         -type => 'text/plain',
5737                         -charset => 'utf-8',
5738                         -expires => $expires,
5739                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5740                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5741                 print "From: " . to_utf8($co{'author'}) . "\n";
5742                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5743                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5744
5745                 print "X-Git-Tag: $tagname\n" if $tagname;
5746                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5747
5748                 foreach my $line (@{$co{'comment'}}) {
5749                         print to_utf8($line) . "\n";
5750                 }
5751                 print "---\n\n";
5752         } elsif ($format eq 'patch') {
5753                 my $filename = basename($project) . "-$hash.patch";
5754
5755                 print $cgi->header(
5756                         -type => 'text/plain',
5757                         -charset => 'utf-8',
5758                         -expires => $expires,
5759                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5760         }
5761
5762         # write patch
5763         if ($format eq 'html') {
5764                 my $use_parents = !defined $hash_parent ||
5765                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5766                 git_difftree_body(\@difftree, $hash,
5767                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5768                 print "<br/>\n";
5769
5770                 git_patchset_body($fd, \@difftree, $hash,
5771                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5772                 close $fd;
5773                 print "</div>\n"; # class="page_body"
5774                 git_footer_html();
5775
5776         } elsif ($format eq 'plain') {
5777                 local $/ = undef;
5778                 print <$fd>;
5779                 close $fd
5780                         or print "Reading git-diff-tree failed\n";
5781         } elsif ($format eq 'patch') {
5782                 local $/ = undef;
5783                 print <$fd>;
5784                 close $fd
5785                         or print "Reading git-format-patch failed\n";
5786         }
5787 }
5788
5789 sub git_commitdiff_plain {
5790         git_commitdiff(-format => 'plain');
5791 }
5792
5793 # format-patch-style patches
5794 sub git_patch {
5795         git_commitdiff(-format => 'patch', -single=> 1);
5796 }
5797
5798 sub git_patches {
5799         git_commitdiff(-format => 'patch');
5800 }
5801
5802 sub git_history {
5803         if (!defined $hash_base) {
5804                 $hash_base = git_get_head_hash($project);
5805         }
5806         if (!defined $page) {
5807                 $page = 0;
5808         }
5809         my $ftype;
5810         my %co = parse_commit($hash_base)
5811             or die_error(404, "Unknown commit object");
5812
5813         my $refs = git_get_references();
5814         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5815
5816         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5817                                        $file_name, "--full-history")
5818             or die_error(404, "No such file or directory on given branch");
5819
5820         if (!defined $hash && defined $file_name) {
5821                 # some commits could have deleted file in question,
5822                 # and not have it in tree, but one of them has to have it
5823                 for (my $i = 0; $i <= @commitlist; $i++) {
5824                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5825                         last if defined $hash;
5826                 }
5827         }
5828         if (defined $hash) {
5829                 $ftype = git_get_type($hash);
5830         }
5831         if (!defined $ftype) {
5832                 die_error(500, "Unknown type of object");
5833         }
5834
5835         my $paging_nav = '';
5836         if ($page > 0) {
5837                 $paging_nav .=
5838                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5839                                                file_name=>$file_name)},
5840                                 "first");
5841                 $paging_nav .= " &sdot; " .
5842                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5843                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5844         } else {
5845                 $paging_nav .= "first";
5846                 $paging_nav .= " &sdot; prev";
5847         }
5848         my $next_link = '';
5849         if ($#commitlist >= 100) {
5850                 $next_link =
5851                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5852                                  -accesskey => "n", -title => "Alt-n"}, "next");
5853                 $paging_nav .= " &sdot; $next_link";
5854         } else {
5855                 $paging_nav .= " &sdot; next";
5856         }
5857
5858         git_header_html();
5859         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5860         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5861         git_print_page_path($file_name, $ftype, $hash_base);
5862
5863         git_history_body(\@commitlist, 0, 99,
5864                          $refs, $hash_base, $ftype, $next_link);
5865
5866         git_footer_html();
5867 }
5868
5869 sub git_search {
5870         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5871         if (!defined $searchtext) {
5872                 die_error(400, "Text field is empty");
5873         }
5874         if (!defined $hash) {
5875                 $hash = git_get_head_hash($project);
5876         }
5877         my %co = parse_commit($hash);
5878         if (!%co) {
5879                 die_error(404, "Unknown commit object");
5880         }
5881         if (!defined $page) {
5882                 $page = 0;
5883         }
5884
5885         $searchtype ||= 'commit';
5886         if ($searchtype eq 'pickaxe') {
5887                 # pickaxe may take all resources of your box and run for several minutes
5888                 # with every query - so decide by yourself how public you make this feature
5889                 gitweb_check_feature('pickaxe')
5890                     or die_error(403, "Pickaxe is disabled");
5891         }
5892         if ($searchtype eq 'grep') {
5893                 gitweb_check_feature('grep')
5894                     or die_error(403, "Grep is disabled");
5895         }
5896
5897         git_header_html();
5898
5899         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5900                 my $greptype;
5901                 if ($searchtype eq 'commit') {
5902                         $greptype = "--grep=";
5903                 } elsif ($searchtype eq 'author') {
5904                         $greptype = "--author=";
5905                 } elsif ($searchtype eq 'committer') {
5906                         $greptype = "--committer=";
5907                 }
5908                 $greptype .= $searchtext;
5909                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5910                                                $greptype, '--regexp-ignore-case',
5911                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5912
5913                 my $paging_nav = '';
5914                 if ($page > 0) {
5915                         $paging_nav .=
5916                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5917                                                        searchtext=>$searchtext,
5918                                                        searchtype=>$searchtype)},
5919                                         "first");
5920                         $paging_nav .= " &sdot; " .
5921                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5922                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5923                 } else {
5924                         $paging_nav .= "first";
5925                         $paging_nav .= " &sdot; prev";
5926                 }
5927                 my $next_link = '';
5928                 if ($#commitlist >= 100) {
5929                         $next_link =
5930                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5931                                          -accesskey => "n", -title => "Alt-n"}, "next");
5932                         $paging_nav .= " &sdot; $next_link";
5933                 } else {
5934                         $paging_nav .= " &sdot; next";
5935                 }
5936
5937                 if ($#commitlist >= 100) {
5938                 }
5939
5940                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5941                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5942                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5943         }
5944
5945         if ($searchtype eq 'pickaxe') {
5946                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5947                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5948
5949                 print "<table class=\"pickaxe search\">\n";
5950                 my $alternate = 1;
5951                 local $/ = "\n";
5952                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5953                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5954                         ($search_use_regexp ? '--pickaxe-regex' : ());
5955                 undef %co;
5956                 my @files;
5957                 while (my $line = <$fd>) {
5958                         chomp $line;
5959                         next unless $line;
5960
5961                         my %set = parse_difftree_raw_line($line);
5962                         if (defined $set{'commit'}) {
5963                                 # finish previous commit
5964                                 if (%co) {
5965                                         print "</td>\n" .
5966                                               "<td class=\"link\">" .
5967                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
5968                                               " | " .
5969                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
5970                                         print "</td>\n" .
5971                                               "</tr>\n";
5972                                 }
5973
5974                                 if ($alternate) {
5975                                         print "<tr class=\"dark\">\n";
5976                                 } else {
5977                                         print "<tr class=\"light\">\n";
5978                                 }
5979                                 $alternate ^= 1;
5980                                 %co = parse_commit($set{'commit'});
5981                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
5982                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
5983                                       "<td><i>$author</i></td>\n" .
5984                                       "<td>" .
5985                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
5986                                               -class => "list subject"},
5987                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
5988                         } elsif (defined $set{'to_id'}) {
5989                                 next if ($set{'to_id'} =~ m/^0{40}$/);
5990
5991                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
5992                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
5993                                               -class => "list"},
5994                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
5995                                       "<br/>\n";
5996                         }
5997                 }
5998                 close $fd;
5999
6000                 # finish last commit (warning: repetition!)
6001                 if (%co) {
6002                         print "</td>\n" .
6003                               "<td class=\"link\">" .
6004                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6005                               " | " .
6006                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6007                         print "</td>\n" .
6008                               "</tr>\n";
6009                 }
6010
6011                 print "</table>\n";
6012         }
6013
6014         if ($searchtype eq 'grep') {
6015                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6016                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6017
6018                 print "<table class=\"grep_search\">\n";
6019                 my $alternate = 1;
6020                 my $matches = 0;
6021                 local $/ = "\n";
6022                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6023                         $search_use_regexp ? ('-E', '-i') : '-F',
6024                         $searchtext, $co{'tree'};
6025                 my $lastfile = '';
6026                 while (my $line = <$fd>) {
6027                         chomp $line;
6028                         my ($file, $lno, $ltext, $binary);
6029                         last if ($matches++ > 1000);
6030                         if ($line =~ /^Binary file (.+) matches$/) {
6031                                 $file = $1;
6032                                 $binary = 1;
6033                         } else {
6034                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6035                         }
6036                         if ($file ne $lastfile) {
6037                                 $lastfile and print "</td></tr>\n";
6038                                 if ($alternate++) {
6039                                         print "<tr class=\"dark\">\n";
6040                                 } else {
6041                                         print "<tr class=\"light\">\n";
6042                                 }
6043                                 print "<td class=\"list\">".
6044                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6045                                                                file_name=>"$file"),
6046                                                 -class => "list"}, esc_path($file));
6047                                 print "</td><td>\n";
6048                                 $lastfile = $file;
6049                         }
6050                         if ($binary) {
6051                                 print "<div class=\"binary\">Binary file</div>\n";
6052                         } else {
6053                                 $ltext = untabify($ltext);
6054                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6055                                         $ltext = esc_html($1, -nbsp=>1);
6056                                         $ltext .= '<span class="match">';
6057                                         $ltext .= esc_html($2, -nbsp=>1);
6058                                         $ltext .= '</span>';
6059                                         $ltext .= esc_html($3, -nbsp=>1);
6060                                 } else {
6061                                         $ltext = esc_html($ltext, -nbsp=>1);
6062                                 }
6063                                 print "<div class=\"pre\">" .
6064                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6065                                                                file_name=>"$file").'#l'.$lno,
6066                                                 -class => "linenr"}, sprintf('%4i', $lno))
6067                                         . ' ' .  $ltext . "</div>\n";
6068                         }
6069                 }
6070                 if ($lastfile) {
6071                         print "</td></tr>\n";
6072                         if ($matches > 1000) {
6073                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6074                         }
6075                 } else {
6076                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6077                 }
6078                 close $fd;
6079
6080                 print "</table>\n";
6081         }
6082         git_footer_html();
6083 }
6084
6085 sub git_search_help {
6086         git_header_html();
6087         git_print_page_nav('','', $hash,$hash,$hash);
6088         print <<EOT;
6089 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6090 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6091 the pattern entered is recognized as the POSIX extended
6092 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6093 insensitive).</p>
6094 <dl>
6095 <dt><b>commit</b></dt>
6096 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6097 EOT
6098         my $have_grep = gitweb_check_feature('grep');
6099         if ($have_grep) {
6100                 print <<EOT;
6101 <dt><b>grep</b></dt>
6102 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6103     a different one) are searched for the given pattern. On large trees, this search can take
6104 a while and put some strain on the server, so please use it with some consideration. Note that
6105 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6106 case-sensitive.</dd>
6107 EOT
6108         }
6109         print <<EOT;
6110 <dt><b>author</b></dt>
6111 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6112 <dt><b>committer</b></dt>
6113 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6114 EOT
6115         my $have_pickaxe = gitweb_check_feature('pickaxe');
6116         if ($have_pickaxe) {
6117                 print <<EOT;
6118 <dt><b>pickaxe</b></dt>
6119 <dd>All commits that caused the string to appear or disappear from any file (changes that
6120 added, removed or "modified" the string) will be listed. This search can take a while and
6121 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6122 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6123 EOT
6124         }
6125         print "</dl>\n";
6126         git_footer_html();
6127 }
6128
6129 sub git_shortlog {
6130         my $head = git_get_head_hash($project);
6131         if (!defined $hash) {
6132                 $hash = $head;
6133         }
6134         if (!defined $page) {
6135                 $page = 0;
6136         }
6137         my $refs = git_get_references();
6138
6139         my $commit_hash = $hash;
6140         if (defined $hash_parent) {
6141                 $commit_hash = "$hash_parent..$hash";
6142         }
6143         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
6144
6145         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
6146         my $next_link = '';
6147         if ($#commitlist >= 100) {
6148                 $next_link =
6149                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6150                                  -accesskey => "n", -title => "Alt-n"}, "next");
6151         }
6152         my $patch_max = gitweb_check_feature('patches');
6153         if ($patch_max) {
6154                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6155                         $paging_nav .= " &sdot; " .
6156                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6157                                         "patches");
6158                 }
6159         }
6160
6161         git_header_html();
6162         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
6163         git_print_header_div('summary', $project);
6164
6165         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
6166
6167         git_footer_html();
6168 }
6169
6170 ## ......................................................................
6171 ## feeds (RSS, Atom; OPML)
6172
6173 sub git_feed {
6174         my $format = shift || 'atom';
6175         my $have_blame = gitweb_check_feature('blame');
6176
6177         # Atom: http://www.atomenabled.org/developers/syndication/
6178         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6179         if ($format ne 'rss' && $format ne 'atom') {
6180                 die_error(400, "Unknown web feed format");
6181         }
6182
6183         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6184         my $head = $hash || 'HEAD';
6185         my @commitlist = parse_commits($head, 150, 0, $file_name);
6186
6187         my %latest_commit;
6188         my %latest_date;
6189         my $content_type = "application/$format+xml";
6190         if (defined $cgi->http('HTTP_ACCEPT') &&
6191                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6192                 # browser (feed reader) prefers text/xml
6193                 $content_type = 'text/xml';
6194         }
6195         if (defined($commitlist[0])) {
6196                 %latest_commit = %{$commitlist[0]};
6197                 my $latest_epoch = $latest_commit{'committer_epoch'};
6198                 %latest_date   = parse_date($latest_epoch);
6199                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6200                 if (defined $if_modified) {
6201                         my $since;
6202                         if (eval { require HTTP::Date; 1; }) {
6203                                 $since = HTTP::Date::str2time($if_modified);
6204                         } elsif (eval { require Time::ParseDate; 1; }) {
6205                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6206                         }
6207                         if (defined $since && $latest_epoch <= $since) {
6208                                 print $cgi->header(
6209                                         -type => $content_type,
6210                                         -charset => 'utf-8',
6211                                         -last_modified => $latest_date{'rfc2822'},
6212                                         -status => '304 Not Modified');
6213                                 return;
6214                         }
6215                 }
6216                 print $cgi->header(
6217                         -type => $content_type,
6218                         -charset => 'utf-8',
6219                         -last_modified => $latest_date{'rfc2822'});
6220         } else {
6221                 print $cgi->header(
6222                         -type => $content_type,
6223                         -charset => 'utf-8');
6224         }
6225
6226         # Optimization: skip generating the body if client asks only
6227         # for Last-Modified date.
6228         return if ($cgi->request_method() eq 'HEAD');
6229
6230         # header variables
6231         my $title = "$site_name - $project/$action";
6232         my $feed_type = 'log';
6233         if (defined $hash) {
6234                 $title .= " - '$hash'";
6235                 $feed_type = 'branch log';
6236                 if (defined $file_name) {
6237                         $title .= " :: $file_name";
6238                         $feed_type = 'history';
6239                 }
6240         } elsif (defined $file_name) {
6241                 $title .= " - $file_name";
6242                 $feed_type = 'history';
6243         }
6244         $title .= " $feed_type";
6245         my $descr = git_get_project_description($project);
6246         if (defined $descr) {
6247                 $descr = esc_html($descr);
6248         } else {
6249                 $descr = "$project " .
6250                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6251                          " feed";
6252         }
6253         my $owner = git_get_project_owner($project);
6254         $owner = esc_html($owner);
6255
6256         #header
6257         my $alt_url;
6258         if (defined $file_name) {
6259                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6260         } elsif (defined $hash) {
6261                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6262         } else {
6263                 $alt_url = href(-full=>1, action=>"summary");
6264         }
6265         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6266         if ($format eq 'rss') {
6267                 print <<XML;
6268 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6269 <channel>
6270 XML
6271                 print "<title>$title</title>\n" .
6272                       "<link>$alt_url</link>\n" .
6273                       "<description>$descr</description>\n" .
6274                       "<language>en</language>\n" .
6275                       # project owner is responsible for 'editorial' content
6276                       "<managingEditor>$owner</managingEditor>\n";
6277                 if (defined $logo || defined $favicon) {
6278                         # prefer the logo to the favicon, since RSS
6279                         # doesn't allow both
6280                         my $img = esc_url($logo || $favicon);
6281                         print "<image>\n" .
6282                               "<url>$img</url>\n" .
6283                               "<title>$title</title>\n" .
6284                               "<link>$alt_url</link>\n" .
6285                               "</image>\n";
6286                 }
6287                 if (%latest_date) {
6288                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6289                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6290                 }
6291                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6292         } elsif ($format eq 'atom') {
6293                 print <<XML;
6294 <feed xmlns="http://www.w3.org/2005/Atom">
6295 XML
6296                 print "<title>$title</title>\n" .
6297                       "<subtitle>$descr</subtitle>\n" .
6298                       '<link rel="alternate" type="text/html" href="' .
6299                       $alt_url . '" />' . "\n" .
6300                       '<link rel="self" type="' . $content_type . '" href="' .
6301                       $cgi->self_url() . '" />' . "\n" .
6302                       "<id>" . href(-full=>1) . "</id>\n" .
6303                       # use project owner for feed author
6304                       "<author><name>$owner</name></author>\n";
6305                 if (defined $favicon) {
6306                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6307                 }
6308                 if (defined $logo_url) {
6309                         # not twice as wide as tall: 72 x 27 pixels
6310                         print "<logo>" . esc_url($logo) . "</logo>\n";
6311                 }
6312                 if (! %latest_date) {
6313                         # dummy date to keep the feed valid until commits trickle in:
6314                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6315                 } else {
6316                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6317                 }
6318                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6319         }
6320
6321         # contents
6322         for (my $i = 0; $i <= $#commitlist; $i++) {
6323                 my %co = %{$commitlist[$i]};
6324                 my $commit = $co{'id'};
6325                 # we read 150, we always show 30 and the ones more recent than 48 hours
6326                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6327                         last;
6328                 }
6329                 my %cd = parse_date($co{'author_epoch'});
6330
6331                 # get list of changed files
6332                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6333                         $co{'parent'} || "--root",
6334                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6335                         or next;
6336                 my @difftree = map { chomp; $_ } <$fd>;
6337                 close $fd
6338                         or next;
6339
6340                 # print element (entry, item)
6341                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6342                 if ($format eq 'rss') {
6343                         print "<item>\n" .
6344                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6345                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6346                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6347                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6348                               "<link>$co_url</link>\n" .
6349                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6350                               "<content:encoded>" .
6351                               "<![CDATA[\n";
6352                 } elsif ($format eq 'atom') {
6353                         print "<entry>\n" .
6354                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6355                               "<updated>$cd{'iso-8601'}</updated>\n" .
6356                               "<author>\n" .
6357                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6358                         if ($co{'author_email'}) {
6359                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6360                         }
6361                         print "</author>\n" .
6362                               # use committer for contributor
6363                               "<contributor>\n" .
6364                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6365                         if ($co{'committer_email'}) {
6366                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6367                         }
6368                         print "</contributor>\n" .
6369                               "<published>$cd{'iso-8601'}</published>\n" .
6370                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6371                               "<id>$co_url</id>\n" .
6372                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6373                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6374                 }
6375                 my $comment = $co{'comment'};
6376                 print "<pre>\n";
6377                 foreach my $line (@$comment) {
6378                         $line = esc_html($line);
6379                         print "$line\n";
6380                 }
6381                 print "</pre><ul>\n";
6382                 foreach my $difftree_line (@difftree) {
6383                         my %difftree = parse_difftree_raw_line($difftree_line);
6384                         next if !$difftree{'from_id'};
6385
6386                         my $file = $difftree{'file'} || $difftree{'to_file'};
6387
6388                         print "<li>" .
6389                               "[" .
6390                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6391                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6392                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6393                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6394                                       -title => "diff"}, 'D');
6395                         if ($have_blame) {
6396                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6397                                                              file_name=>$file, hash_base=>$commit),
6398                                               -title => "blame"}, 'B');
6399                         }
6400                         # if this is not a feed of a file history
6401                         if (!defined $file_name || $file_name ne $file) {
6402                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6403                                                              file_name=>$file, hash=>$commit),
6404                                               -title => "history"}, 'H');
6405                         }
6406                         $file = esc_path($file);
6407                         print "] ".
6408                               "$file</li>\n";
6409                 }
6410                 if ($format eq 'rss') {
6411                         print "</ul>]]>\n" .
6412                               "</content:encoded>\n" .
6413                               "</item>\n";
6414                 } elsif ($format eq 'atom') {
6415                         print "</ul>\n</div>\n" .
6416                               "</content>\n" .
6417                               "</entry>\n";
6418                 }
6419         }
6420
6421         # end of feed
6422         if ($format eq 'rss') {
6423                 print "</channel>\n</rss>\n";
6424         } elsif ($format eq 'atom') {
6425                 print "</feed>\n";
6426         }
6427 }
6428
6429 sub git_rss {
6430         git_feed('rss');
6431 }
6432
6433 sub git_atom {
6434         git_feed('atom');
6435 }
6436
6437 sub git_opml {
6438         my @list = git_get_projects_list();
6439
6440         print $cgi->header(
6441                 -type => 'text/xml',
6442                 -charset => 'utf-8',
6443                 -content_disposition => 'inline; filename="opml.xml"');
6444
6445         print <<XML;
6446 <?xml version="1.0" encoding="utf-8"?>
6447 <opml version="1.0">
6448 <head>
6449   <title>$site_name OPML Export</title>
6450 </head>
6451 <body>
6452 <outline text="git RSS feeds">
6453 XML
6454
6455         foreach my $pr (@list) {
6456                 my %proj = %$pr;
6457                 my $head = git_get_head_hash($proj{'path'});
6458                 if (!defined $head) {
6459                         next;
6460                 }
6461                 $git_dir = "$projectroot/$proj{'path'}";
6462                 my %co = parse_commit($head);
6463                 if (!%co) {
6464                         next;
6465                 }
6466
6467                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6468                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6469                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6470                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6471         }
6472         print <<XML;
6473 </outline>
6474 </body>
6475 </opml>
6476 XML
6477 }