gitweb/gitweb.perl

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