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