git.oblomov.eu Git - git/blob - 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         #       'disabled' => boolean (optional)}
 165         #
 166         'tgz' => {
 167                 'display' => 'tar.gz',
 168                 'type' => 'application/x-gzip',
 169                 'suffix' => '.tar.gz',
 170                 'format' => 'tar',
 171                 'compressor' => ['gzip']},
 172
 173         'tbz2' => {
 174                 'display' => 'tar.bz2',
 175                 'type' => 'application/x-bzip2',
 176                 'suffix' => '.tar.bz2',
 177                 'format' => 'tar',
 178                 'compressor' => ['bzip2']},
 179
 180         'txz' => {
 181                 'display' => 'tar.xz',
 182                 'type' => 'application/x-xz',
 183                 'suffix' => '.tar.xz',
 184                 'format' => 'tar',
 185                 'compressor' => ['xz'],
 186                 'disabled' => 1},
 187
 188         'zip' => {
 189                 'display' => 'zip',
 190                 'type' => 'application/x-zip',
 191                 'suffix' => '.zip',
 192                 'format' => 'zip'},
 193 );
 194
 195 # Aliases so we understand old gitweb.snapshot values in repository
 196 # configuration.
 197 our %known_snapshot_format_aliases = (
 198         'gzip'  => 'tgz',
 199         'bzip2' => 'tbz2',
 200         'xz'    => 'txz',
 201
 202         # backward compatibility: legacy gitweb config support
 203         'x-gzip' => undef, 'gz' => undef,
 204         'x-bzip2' => undef, 'bz2' => undef,
 205         'x-zip' => undef, '' => undef,
 206 );
 207
 208 # Pixel sizes for icons and avatars. If the default font sizes or lineheights
 209 # are changed, it may be appropriate to change these values too via
 210 # $GITWEB_CONFIG.
 211 our %avatar_size = (
 212         'default' => 16,
 213         'double'  => 32
 214 );
 215
 216 # You define site-wide feature defaults here; override them with
 217 # $GITWEB_CONFIG as necessary.
 218 our %feature = (
 219         # feature => {
 220         #       'sub' => feature-sub (subroutine),
 221         #       'override' => allow-override (boolean),
 222         #       'default' => [ default options...] (array reference)}
 223         #
 224         # if feature is overridable (it means that allow-override has true value),
 225         # then feature-sub will be called with default options as parameters;
 226         # return value of feature-sub indicates if to enable specified feature
 227         #
 228         # if there is no 'sub' key (no feature-sub), then feature cannot be
 229         # overriden
 230         #
 231         # use gitweb_get_feature(<feature>) to retrieve the <feature> value
 232         # (an array) or gitweb_check_feature(<feature>) to check if <feature>
 233         # is enabled
 234
 235         # Enable the 'blame' blob view, showing the last commit that modified
 236         # each line in the file. This can be very CPU-intensive.
 237
 238         # To enable system wide have in $GITWEB_CONFIG
 239         # $feature{'blame'}{'default'} = [1];
 240         # To have project specific config enable override in $GITWEB_CONFIG
 241         # $feature{'blame'}{'override'} = 1;
 242         # and in project config gitweb.blame = 0|1;
 243         'blame' => {
 244                 'sub' => sub { feature_bool('blame', @_) },
 245                 'override' => 0,
 246                 'default' => [0]},
 247
 248         # Enable the 'snapshot' link, providing a compressed archive of any
 249         # tree. This can potentially generate high traffic if you have large
 250         # project.
 251
 252         # Value is a list of formats defined in %known_snapshot_formats that
 253         # you wish to offer.
 254         # To disable system wide have in $GITWEB_CONFIG
 255         # $feature{'snapshot'}{'default'} = [];
 256         # To have project specific config enable override in $GITWEB_CONFIG
 257         # $feature{'snapshot'}{'override'} = 1;
 258         # and in project config, a comma-separated list of formats or "none"
 259         # to disable.  Example: gitweb.snapshot = tbz2,zip;
 260         'snapshot' => {
 261                 'sub' => \&feature_snapshot,
 262                 'override' => 0,
 263                 'default' => ['tgz']},
 264
 265         # Enable text search, which will list the commits which match author,
 266         # committer or commit text to a given string.  Enabled by default.
 267         # Project specific override is not supported.
 268         'search' => {
 269                 'override' => 0,
 270                 'default' => [1]},
 271
 272         # Enable grep search, which will list the files in currently selected
 273         # tree containing the given string. Enabled by default. This can be
 274         # potentially CPU-intensive, of course.
 275
 276         # To enable system wide have in $GITWEB_CONFIG
 277         # $feature{'grep'}{'default'} = [1];
 278         # To have project specific config enable override in $GITWEB_CONFIG
 279         # $feature{'grep'}{'override'} = 1;
 280         # and in project config gitweb.grep = 0|1;
 281         'grep' => {
 282                 'sub' => sub { feature_bool('grep', @_) },
 283                 'override' => 0,
 284                 'default' => [1]},
 285
 286         # Enable the pickaxe search, which will list the commits that modified
 287         # a given string in a file. This can be practical and quite faster
 288         # alternative to 'blame', but still potentially CPU-intensive.
 289
 290         # To enable system wide have in $GITWEB_CONFIG
 291         # $feature{'pickaxe'}{'default'} = [1];
 292         # To have project specific config enable override in $GITWEB_CONFIG
 293         # $feature{'pickaxe'}{'override'} = 1;
 294         # and in project config gitweb.pickaxe = 0|1;
 295         'pickaxe' => {
 296                 'sub' => sub { feature_bool('pickaxe', @_) },
 297                 'override' => 0,
 298                 'default' => [1]},
 299
 300         # Make gitweb use an alternative format of the URLs which can be
 301         # more readable and natural-looking: project name is embedded
 302         # directly in the path and the query string contains other
 303         # auxiliary information. All gitweb installations recognize
 304         # URL in either format; this configures in which formats gitweb
 305         # generates links.
 306
 307         # To enable system wide have in $GITWEB_CONFIG
 308         # $feature{'pathinfo'}{'default'} = [1];
 309         # Project specific override is not supported.
 310
 311         # Note that you will need to change the default location of CSS,
 312         # favicon, logo and possibly other files to an absolute URL. Also,
 313         # if gitweb.cgi serves as your indexfile, you will need to force
 314         # $my_uri to contain the script name in your $GITWEB_CONFIG.
 315         'pathinfo' => {
 316                 'override' => 0,
 317                 'default' => [0]},
 318
 319         # Make gitweb consider projects in project root subdirectories
 320         # to be forks of existing projects. Given project $projname.git,
 321         # projects matching $projname/*.git will not be shown in the main
 322         # projects list, instead a '+' mark will be added to $projname
 323         # there and a 'forks' view will be enabled for the project, listing
 324         # all the forks. If project list is taken from a file, forks have
 325         # to be listed after the main project.
 326
 327         # To enable system wide have in $GITWEB_CONFIG
 328         # $feature{'forks'}{'default'} = [1];
 329         # Project specific override is not supported.
 330         'forks' => {
 331                 'override' => 0,
 332                 'default' => [0]},
 333
 334         # Insert custom links to the action bar of all project pages.
 335         # This enables you mainly to link to third-party scripts integrating
 336         # into gitweb; e.g. git-browser for graphical history representation
 337         # or custom web-based repository administration interface.
 338
 339         # The 'default' value consists of a list of triplets in the form
 340         # (label, link, position) where position is the label after which
 341         # to insert the link and link is a format string where %n expands
 342         # to the project name, %f to the project path within the filesystem,
 343         # %h to the current hash (h gitweb parameter) and %b to the current
 344         # hash base (hb gitweb parameter); %% expands to %.
 345
 346         # To enable system wide have in $GITWEB_CONFIG e.g.
 347         # $feature{'actions'}{'default'} = [('graphiclog',
 348         #       '/git-browser/by-commit.html?r=%n', 'summary')];
 349         # Project specific override is not supported.
 350         'actions' => {
 351                 'override' => 0,
 352                 'default' => []},
 353
 354         # Allow gitweb scan project content tags described in ctags/
 355         # of project repository, and display the popular Web 2.0-ish
 356         # "tag cloud" near the project list. Note that this is something
 357         # COMPLETELY different from the normal Git tags.
 358
 359         # gitweb by itself can show existing tags, but it does not handle
 360         # tagging itself; you need an external application for that.
 361         # For an example script, check Girocco's cgi/tagproj.cgi.
 362         # You may want to install the HTML::TagCloud Perl module to get
 363         # a pretty tag cloud instead of just a list of tags.
 364
 365         # To enable system wide have in $GITWEB_CONFIG
 366         # $feature{'ctags'}{'default'} = ['path_to_tag_script'];
 367         # Project specific override is not supported.
 368         'ctags' => {
 369                 'override' => 0,
 370                 'default' => [0]},
 371
 372         # The maximum number of patches in a patchset generated in patch
 373         # view. Set this to 0 or undef to disable patch view, or to a
 374         # negative number to remove any limit.
 375
 376         # To disable system wide have in $GITWEB_CONFIG
 377         # $feature{'patches'}{'default'} = [0];
 378         # To have project specific config enable override in $GITWEB_CONFIG
 379         # $feature{'patches'}{'override'} = 1;
 380         # and in project config gitweb.patches = 0|n;
 381         # where n is the maximum number of patches allowed in a patchset.
 382         'patches' => {
 383                 'sub' => \&feature_patches,
 384                 'override' => 0,
 385                 'default' => [16]},
 386
 387         # Avatar support. When this feature is enabled, views such as
 388         # shortlog or commit will display an avatar associated with
 389         # the email of the committer(s) and/or author(s).
 390
 391         # Currently available providers are gravatar and picon.
 392         # If an unknown provider is specified, the feature is disabled.
 393
 394         # Gravatar depends on Digest::MD5.
 395         # Picon currently relies on the indiana.edu database.
 396
 397         # To enable system wide have in $GITWEB_CONFIG
 398         # $feature{'avatar'}{'default'} = ['<provider>'];
 399         # where <provider> is either gravatar or picon.
 400         # To have project specific config enable override in $GITWEB_CONFIG
 401         # $feature{'avatar'}{'override'} = 1;
 402         # and in project config gitweb.avatar = <provider>;
 403         'avatar' => {
 404                 'sub' => \&feature_avatar,
 405                 'override' => 0,
 406                 'default' => ['']},
 407 );
 408
 409 sub gitweb_get_feature {
 410         my ($name) = @_;
 411         return unless exists $feature{$name};
 412         my ($sub, $override, @defaults) = (
 413                 $feature{$name}{'sub'},
 414                 $feature{$name}{'override'},
 415                 @{$feature{$name}{'default'}});
 416         if (!$override) { return @defaults; }
 417         if (!defined $sub) {
 418                 warn "feature $name is not overridable";
 419                 return @defaults;
 420         }
 421         return $sub->(@defaults);
 422 }
 423
 424 # A wrapper to check if a given feature is enabled.
 425 # With this, you can say
 426 #
 427 #   my $bool_feat = gitweb_check_feature('bool_feat');
 428 #   gitweb_check_feature('bool_feat') or somecode;
 429 #
 430 # instead of
 431 #
 432 #   my ($bool_feat) = gitweb_get_feature('bool_feat');
 433 #   (gitweb_get_feature('bool_feat'))[0] or somecode;
 434 #
 435 sub gitweb_check_feature {
 436         return (gitweb_get_feature(@_))[0];
 437 }
 438
 439
 440 sub feature_bool {
 441         my $key = shift;
 442         my ($val) = git_get_project_config($key, '--bool');
 443
 444         if (!defined $val) {
 445                 return ($_[0]);
 446         } elsif ($val eq 'true') {
 447                 return (1);
 448         } elsif ($val eq 'false') {
 449                 return (0);
 450         }
 451 }
 452
 453 sub feature_snapshot {
 454         my (@fmts) = @_;
 455
 456         my ($val) = git_get_project_config('snapshot');
 457
 458         if ($val) {
 459                 @fmts = ($val eq 'none' ? () : split /\s*[,\s]\s*/, $val);
 460         }
 461
 462         return @fmts;
 463 }
 464
 465 sub feature_patches {
 466         my @val = (git_get_project_config('patches', '--int'));
 467
 468         if (@val) {
 469                 return @val;
 470         }
 471
 472         return ($_[0]);
 473 }
 474
 475 sub feature_avatar {
 476         my @val = (git_get_project_config('avatar'));
 477
 478         return @val ? @val : @_;
 479 }
 480
 481 # checking HEAD file with -e is fragile if the repository was
 482 # initialized long time ago (i.e. symlink HEAD) and was pack-ref'ed
 483 # and then pruned.
 484 sub check_head_link {
 485         my ($dir) = @_;
 486         my $headfile = "$dir/HEAD";
 487         return ((-e $headfile) ||
 488                 (-l $headfile && readlink($headfile) =~ /^refs\/heads\//));
 489 }
 490
 491 sub check_export_ok {
 492         my ($dir) = @_;
 493         return (check_head_link($dir) &&
 494                 (!$export_ok || -e "$dir/$export_ok") &&
 495                 (!$export_auth_hook || $export_auth_hook->($dir)));
 496 }
 497
 498 # process alternate names for backward compatibility
 499 # filter out unsupported (unknown) snapshot formats
 500 sub filter_snapshot_fmts {
 501         my @fmts = @_;
 502
 503         @fmts = map {
 504                 exists $known_snapshot_format_aliases{$_} ?
 505                        $known_snapshot_format_aliases{$_} : $_} @fmts;
 506         @fmts = grep {
 507                 exists $known_snapshot_formats{$_} &&
 508                 !$known_snapshot_formats{$_}{'disabled'}} @fmts;
 509 }
 510
 511 our $GITWEB_CONFIG = $ENV{'GITWEB_CONFIG'} || "++GITWEB_CONFIG++";
 512 if (-e $GITWEB_CONFIG) {
 513         do $GITWEB_CONFIG;
 514 } else {
 515         our $GITWEB_CONFIG_SYSTEM = $ENV{'GITWEB_CONFIG_SYSTEM'} || "++GITWEB_CONFIG_SYSTEM++";
 516         do $GITWEB_CONFIG_SYSTEM if -e $GITWEB_CONFIG_SYSTEM;
 517 }
 518
 519 # version of the core git binary
 520 our $git_version = qx("$GIT" --version) =~ m/git version (.*)$/ ? $1 : "unknown";
 521
 522 $projects_list ||= $projectroot;
 523
 524 # ======================================================================
 525 # input validation and dispatch
 526
 527 # input parameters can be collected from a variety of sources (presently, CGI
 528 # and PATH_INFO), so we define an %input_params hash that collects them all
 529 # together during validation: this allows subsequent uses (e.g. href()) to be
 530 # agnostic of the parameter origin
 531
 532 our %input_params = ();
 533
 534 # input parameters are stored with the long parameter name as key. This will
 535 # also be used in the href subroutine to convert parameters to their CGI
 536 # equivalent, and since the href() usage is the most frequent one, we store
 537 # the name -> CGI key mapping here, instead of the reverse.
 538 #
 539 # XXX: Warning: If you touch this, check the search form for updating,
 540 # too.
 541
 542 our @cgi_param_mapping = (
 543         project => "p",
 544         action => "a",
 545         file_name => "f",
 546         file_parent => "fp",
 547         hash => "h",
 548         hash_parent => "hp",
 549         hash_base => "hb",
 550         hash_parent_base => "hpb",
 551         page => "pg",
 552         order => "o",
 553         searchtext => "s",
 554         searchtype => "st",
 555         snapshot_format => "sf",
 556         extra_options => "opt",
 557         search_use_regexp => "sr",
 558 );
 559 our %cgi_param_mapping = @cgi_param_mapping;
 560
 561 # we will also need to know the possible actions, for validation
 562 our %actions = (
 563         "blame" => \&git_blame,
 564         "blobdiff" => \&git_blobdiff,
 565         "blobdiff_plain" => \&git_blobdiff_plain,
 566         "blob" => \&git_blob,
 567         "blob_plain" => \&git_blob_plain,
 568         "commitdiff" => \&git_commitdiff,
 569         "commitdiff_plain" => \&git_commitdiff_plain,
 570         "commit" => \&git_commit,
 571         "forks" => \&git_forks,
 572         "heads" => \&git_heads,
 573         "history" => \&git_history,
 574         "log" => \&git_log,
 575         "patch" => \&git_patch,
 576         "patches" => \&git_patches,
 577         "rss" => \&git_rss,
 578         "atom" => \&git_atom,
 579         "search" => \&git_search,
 580         "search_help" => \&git_search_help,
 581         "shortlog" => \&git_shortlog,
 582         "summary" => \&git_summary,
 583         "tag" => \&git_tag,
 584         "tags" => \&git_tags,
 585         "tree" => \&git_tree,
 586         "snapshot" => \&git_snapshot,
 587         "object" => \&git_object,
 588         # those below don't need $project
 589         "opml" => \&git_opml,
 590         "project_list" => \&git_project_list,
 591         "project_index" => \&git_project_index,
 592 );
 593
 594 # finally, we have the hash of allowed extra_options for the commands that
 595 # allow them
 596 our %allowed_options = (
 597         "--no-merges" => [ qw(rss atom log shortlog history) ],
 598 );
 599
 600 # fill %input_params with the CGI parameters. All values except for 'opt'
 601 # should be single values, but opt can be an array. We should probably
 602 # build an array of parameters that can be multi-valued, but since for the time
 603 # being it's only this one, we just single it out
 604 while (my ($name, $symbol) = each %cgi_param_mapping) {
 605         if ($symbol eq 'opt') {
 606                 $input_params{$name} = [ $cgi->param($symbol) ];
 607         } else {
 608                 $input_params{$name} = $cgi->param($symbol);
 609         }
 610 }
 611
 612 # now read PATH_INFO and update the parameter list for missing parameters
 613 sub evaluate_path_info {
 614         return if defined $input_params{'project'};
 615         return if !$path_info;
 616         $path_info =~ s,^/+,,;
 617         return if !$path_info;
 618
 619         # find which part of PATH_INFO is project
 620         my $project = $path_info;
 621         $project =~ s,/+$,,;
 622         while ($project && !check_head_link("$projectroot/$project")) {
 623                 $project =~ s,/*[^/]*$,,;
 624         }
 625         return unless $project;
 626         $input_params{'project'} = $project;
 627
 628         # do not change any parameters if an action is given using the query string
 629         return if $input_params{'action'};
 630         $path_info =~ s,^\Q$project\E/*,,;
 631
 632         # next, check if we have an action
 633         my $action = $path_info;
 634         $action =~ s,/.*$,,;
 635         if (exists $actions{$action}) {
 636                 $path_info =~ s,^$action/*,,;
 637                 $input_params{'action'} = $action;
 638         }
 639
 640         # list of actions that want hash_base instead of hash, but can have no
 641         # pathname (f) parameter
 642         my @wants_base = (
 643                 'tree',
 644                 'history',
 645         );
 646
 647         # we want to catch
 648         # [$hash_parent_base[:$file_parent]..]$hash_parent[:$file_name]
 649         my ($parentrefname, $parentpathname, $refname, $pathname) =
 650                 ($path_info =~ /^(?:(.+?)(?::(.+))?\.\.)?(.+?)(?::(.+))?$/);
 651
 652         # first, analyze the 'current' part
 653         if (defined $pathname) {
 654                 # we got "branch:filename" or "branch:dir/"
 655                 # we could use git_get_type(branch:pathname), but:
 656                 # - it needs $git_dir
 657                 # - it does a git() call
 658                 # - the convention of terminating directories with a slash
 659                 #   makes it superfluous
 660                 # - embedding the action in the PATH_INFO would make it even
 661                 #   more superfluous
 662                 $pathname =~ s,^/+,,;
 663                 if (!$pathname || substr($pathname, -1) eq "/") {
 664                         $input_params{'action'} ||= "tree";
 665                         $pathname =~ s,/$,,;
 666                 } else {
 667                         # the default action depends on whether we had parent info
 668                         # or not
 669                         if ($parentrefname) {
 670                                 $input_params{'action'} ||= "blobdiff_plain";
 671                         } else {
 672                                 $input_params{'action'} ||= "blob_plain";
 673                         }
 674                 }
 675                 $input_params{'hash_base'} ||= $refname;
 676                 $input_params{'file_name'} ||= $pathname;
 677         } elsif (defined $refname) {
 678                 # we got "branch". In this case we have to choose if we have to
 679                 # set hash or hash_base.
 680                 #
 681                 # Most of the actions without a pathname only want hash to be
 682                 # set, except for the ones specified in @wants_base that want
 683                 # hash_base instead. It should also be noted that hand-crafted
 684                 # links having 'history' as an action and no pathname or hash
 685                 # set will fail, but that happens regardless of PATH_INFO.
 686                 $input_params{'action'} ||= "shortlog";
 687                 if (grep { $_ eq $input_params{'action'} } @wants_base) {
 688                         $input_params{'hash_base'} ||= $refname;
 689                 } else {
 690                         $input_params{'hash'} ||= $refname;
 691                 }
 692         }
 693
 694         # next, handle the 'parent' part, if present
 695         if (defined $parentrefname) {
 696                 # a missing pathspec defaults to the 'current' filename, allowing e.g.
 697                 # someproject/blobdiff/oldrev..newrev:/filename
 698                 if ($parentpathname) {
 699                         $parentpathname =~ s,^/+,,;
 700                         $parentpathname =~ s,/$,,;
 701                         $input_params{'file_parent'} ||= $parentpathname;
 702                 } else {
 703                         $input_params{'file_parent'} ||= $input_params{'file_name'};
 704                 }
 705                 # we assume that hash_parent_base is wanted if a path was specified,
 706                 # or if the action wants hash_base instead of hash
 707                 if (defined $input_params{'file_parent'} ||
 708                         grep { $_ eq $input_params{'action'} } @wants_base) {
 709                         $input_params{'hash_parent_base'} ||= $parentrefname;
 710                 } else {
 711                         $input_params{'hash_parent'} ||= $parentrefname;
 712                 }
 713         }
 714
 715         # for the snapshot action, we allow URLs in the form
 716         # $project/snapshot/$hash.ext
 717         # where .ext determines the snapshot and gets removed from the
 718         # passed $refname to provide the $hash.
 719         #
 720         # To be able to tell that $refname includes the format extension, we
 721         # require the following two conditions to be satisfied:
 722         # - the hash input parameter MUST have been set from the $refname part
 723         #   of the URL (i.e. they must be equal)
 724         # - the snapshot format MUST NOT have been defined already (e.g. from
 725         #   CGI parameter sf)
 726         # It's also useless to try any matching unless $refname has a dot,
 727         # so we check for that too
 728         if (defined $input_params{'action'} &&
 729                 $input_params{'action'} eq 'snapshot' &&
 730                 defined $refname && index($refname, '.') != -1 &&
 731                 $refname eq $input_params{'hash'} &&
 732                 !defined $input_params{'snapshot_format'}) {
 733                 # We loop over the known snapshot formats, checking for
 734                 # extensions. Allowed extensions are both the defined suffix
 735                 # (which includes the initial dot already) and the snapshot
 736                 # format key itself, with a prepended dot
 737                 while (my ($fmt, $opt) = each %known_snapshot_formats) {
 738                         my $hash = $refname;
 739                         unless ($hash =~ s/(\Q$opt->{'suffix'}\E|\Q.$fmt\E)$//) {
 740                                 next;
 741                         }
 742                         my $sfx = $1;
 743                         # a valid suffix was found, so set the snapshot format
 744                         # and reset the hash parameter
 745                         $input_params{'snapshot_format'} = $fmt;
 746                         $input_params{'hash'} = $hash;
 747                         # we also set the format suffix to the one requested
 748                         # in the URL: this way a request for e.g. .tgz returns
 749                         # a .tgz instead of a .tar.gz
 750                         $known_snapshot_formats{$fmt}{'suffix'} = $sfx;
 751                         last;
 752                 }
 753         }
 754 }
 755 evaluate_path_info();
 756
 757 our $action = $input_params{'action'};
 758 if (defined $action) {
 759         if (!validate_action($action)) {
 760                 die_error(400, "Invalid action parameter");
 761         }
 762 }
 763
 764 # parameters which are pathnames
 765 our $project = $input_params{'project'};
 766 if (defined $project) {
 767         if (!validate_project($project)) {
 768                 undef $project;
 769                 die_error(404, "No such project");
 770         }
 771 }
 772
 773 our $file_name = $input_params{'file_name'};
 774 if (defined $file_name) {
 775         if (!validate_pathname($file_name)) {
 776                 die_error(400, "Invalid file parameter");
 777         }
 778 }
 779
 780 our $file_parent = $input_params{'file_parent'};
 781 if (defined $file_parent) {
 782         if (!validate_pathname($file_parent)) {
 783                 die_error(400, "Invalid file parent parameter");
 784         }
 785 }
 786
 787 # parameters which are refnames
 788 our $hash = $input_params{'hash'};
 789 if (defined $hash) {
 790         if (!validate_refname($hash)) {
 791                 die_error(400, "Invalid hash parameter");
 792         }
 793 }
 794
 795 our $hash_parent = $input_params{'hash_parent'};
 796 if (defined $hash_parent) {
 797         if (!validate_refname($hash_parent)) {
 798                 die_error(400, "Invalid hash parent parameter");
 799         }
 800 }
 801
 802 our $hash_base = $input_params{'hash_base'};
 803 if (defined $hash_base) {
 804         if (!validate_refname($hash_base)) {
 805                 die_error(400, "Invalid hash base parameter");
 806         }
 807 }
 808
 809 our @extra_options = @{$input_params{'extra_options'}};
 810 # @extra_options is always defined, since it can only be (currently) set from
 811 # CGI, and $cgi->param() returns the empty array in array context if the param
 812 # is not set
 813 foreach my $opt (@extra_options) {
 814         if (not exists $allowed_options{$opt}) {
 815                 die_error(400, "Invalid option parameter");
 816         }
 817         if (not grep(/^$action$/, @{$allowed_options{$opt}})) {
 818                 die_error(400, "Invalid option parameter for this action");
 819         }
 820 }
 821
 822 our $hash_parent_base = $input_params{'hash_parent_base'};
 823 if (defined $hash_parent_base) {
 824         if (!validate_refname($hash_parent_base)) {
 825                 die_error(400, "Invalid hash parent base parameter");
 826         }
 827 }
 828
 829 # other parameters
 830 our $page = $input_params{'page'};
 831 if (defined $page) {
 832         if ($page =~ m/[^0-9]/) {
 833                 die_error(400, "Invalid page parameter");
 834         }
 835 }
 836
 837 our $searchtype = $input_params{'searchtype'};
 838 if (defined $searchtype) {
 839         if ($searchtype =~ m/[^a-z]/) {
 840                 die_error(400, "Invalid searchtype parameter");
 841         }
 842 }
 843
 844 our $search_use_regexp = $input_params{'search_use_regexp'};
 845
 846 our $searchtext = $input_params{'searchtext'};
 847 our $search_regexp;
 848 if (defined $searchtext) {
 849         if (length($searchtext) < 2) {
 850                 die_error(403, "At least two characters are required for search parameter");
 851         }
 852         $search_regexp = $search_use_regexp ? $searchtext : quotemeta $searchtext;
 853 }
 854
 855 # path to the current git repository
 856 our $git_dir;
 857 $git_dir = "$projectroot/$project" if $project;
 858
 859 # list of supported snapshot formats
 860 our @snapshot_fmts = gitweb_get_feature('snapshot');
 861 @snapshot_fmts = filter_snapshot_fmts(@snapshot_fmts);
 862
 863 # check that the avatar feature is set to a known provider name,
 864 # and for each provider check if the dependencies are satisfied.
 865 # if the provider name is invalid or the dependencies are not met,
 866 # reset $git_avatar to the empty string.
 867 our ($git_avatar) = gitweb_get_feature('avatar');
 868 if ($git_avatar eq 'gravatar') {
 869         $git_avatar = '' unless (eval { require Digest::MD5; 1; });
 870 } elsif ($git_avatar eq 'picon') {
 871         # no dependencies
 872 } else {
 873         $git_avatar = '';
 874 }
 875
 876 # dispatch
 877 if (!defined $action) {
 878         if (defined $hash) {
 879                 $action = git_get_type($hash);
 880         } elsif (defined $hash_base && defined $file_name) {
 881                 $action = git_get_type("$hash_base:$file_name");
 882         } elsif (defined $project) {
 883                 $action = 'summary';
 884         } else {
 885                 $action = 'project_list';
 886         }
 887 }
 888 if (!defined($actions{$action})) {
 889         die_error(400, "Unknown action");
 890 }
 891 if ($action !~ m/^(?:opml|project_list|project_index)$/ &&
 892     !$project) {
 893         die_error(400, "Project needed");
 894 }
 895 $actions{$action}->();
 896 exit;
 897
 898 ## ======================================================================
 899 ## action links
 900
 901 sub href {
 902         my %params = @_;
 903         # default is to use -absolute url() i.e. $my_uri
 904         my $href = $params{-full} ? $my_url : $my_uri;
 905
 906         $params{'project'} = $project unless exists $params{'project'};
 907
 908         if ($params{-replay}) {
 909                 while (my ($name, $symbol) = each %cgi_param_mapping) {
 910                         if (!exists $params{$name}) {
 911                                 $params{$name} = $input_params{$name};
 912                         }
 913                 }
 914         }
 915
 916         my $use_pathinfo = gitweb_check_feature('pathinfo');
 917         if ($use_pathinfo and defined $params{'project'}) {
 918                 # try to put as many parameters as possible in PATH_INFO:
 919                 #   - project name
 920                 #   - action
 921                 #   - hash_parent or hash_parent_base:/file_parent
 922                 #   - hash or hash_base:/filename
 923                 #   - the snapshot_format as an appropriate suffix
 924
 925                 # When the script is the root DirectoryIndex for the domain,
 926                 # $href here would be something like http://gitweb.example.com/
 927                 # Thus, we strip any trailing / from $href, to spare us double
 928                 # slashes in the final URL
 929                 $href =~ s,/$,,;
 930
 931                 # Then add the project name, if present
 932                 $href .= "/".esc_url($params{'project'});
 933                 delete $params{'project'};
 934
 935                 # since we destructively absorb parameters, we keep this
 936                 # boolean that remembers if we're handling a snapshot
 937                 my $is_snapshot = $params{'action'} eq 'snapshot';
 938
 939                 # Summary just uses the project path URL, any other action is
 940                 # added to the URL
 941                 if (defined $params{'action'}) {
 942                         $href .= "/".esc_url($params{'action'}) unless $params{'action'} eq 'summary';
 943                         delete $params{'action'};
 944                 }
 945
 946                 # Next, we put hash_parent_base:/file_parent..hash_base:/file_name,
 947                 # stripping nonexistent or useless pieces
 948                 $href .= "/" if ($params{'hash_base'} || $params{'hash_parent_base'}
 949                         || $params{'hash_parent'} || $params{'hash'});
 950                 if (defined $params{'hash_base'}) {
 951                         if (defined $params{'hash_parent_base'}) {
 952                                 $href .= esc_url($params{'hash_parent_base'});
 953                                 # skip the file_parent if it's the same as the file_name
 954                                 if (defined $params{'file_parent'}) {
 955                                         if (defined $params{'file_name'} && $params{'file_parent'} eq $params{'file_name'}) {
 956                                                 delete $params{'file_parent'};
 957                                         } elsif ($params{'file_parent'} !~ /\.\./) {
 958                                                 $href .= ":/".esc_url($params{'file_parent'});
 959                                                 delete $params{'file_parent'};
 960                                         }
 961                                 }
 962                                 $href .= "..";
 963                                 delete $params{'hash_parent'};
 964                                 delete $params{'hash_parent_base'};
 965                         } elsif (defined $params{'hash_parent'}) {
 966                                 $href .= esc_url($params{'hash_parent'}). "..";
 967                                 delete $params{'hash_parent'};
 968                         }
 969
 970                         $href .= esc_url($params{'hash_base'});
 971                         if (defined $params{'file_name'} && $params{'file_name'} !~ /\.\./) {
 972                                 $href .= ":/".esc_url($params{'file_name'});
 973                                 delete $params{'file_name'};
 974                         }
 975                         delete $params{'hash'};
 976                         delete $params{'hash_base'};
 977                 } elsif (defined $params{'hash'}) {
 978                         $href .= esc_url($params{'hash'});
 979                         delete $params{'hash'};
 980                 }
 981
 982                 # If the action was a snapshot, we can absorb the
 983                 # snapshot_format parameter too
 984                 if ($is_snapshot) {
 985                         my $fmt = $params{'snapshot_format'};
 986                         # snapshot_format should always be defined when href()
 987                         # is called, but just in case some code forgets, we
 988                         # fall back to the default
 989                         $fmt ||= $snapshot_fmts[0];
 990                         $href .= $known_snapshot_formats{$fmt}{'suffix'};
 991                         delete $params{'snapshot_format'};
 992                 }
 993         }
 994
 995         # now encode the parameters explicitly
 996         my @result = ();
 997         for (my $i = 0; $i < @cgi_param_mapping; $i += 2) {
 998                 my ($name, $symbol) = ($cgi_param_mapping[$i], $cgi_param_mapping[$i+1]);
 999                 if (defined $params{$name}) {
1000                         if (ref($params{$name}) eq "ARRAY") {
1001                                 foreach my $par (@{$params{$name}}) {
1002                                         push @result, $symbol . "=" . esc_param($par);
1003                                 }
1004                         } else {
1005                                 push @result, $symbol . "=" . esc_param($params{$name});
1006                         }
1007                 }
1008         }
1009         $href .= "?" . join(';', @result) if scalar @result;
1010
1011         return $href;
1012 }
1013
1014
1015 ## ======================================================================
1016 ## validation, quoting/unquoting and escaping
1017
1018 sub validate_action {
1019         my $input = shift || return undef;
1020         return undef unless exists $actions{$input};
1021         return $input;
1022 }
1023
1024 sub validate_project {
1025         my $input = shift || return undef;
1026         if (!validate_pathname($input) ||
1027                 !(-d "$projectroot/$input") ||
1028                 !check_export_ok("$projectroot/$input") ||
1029                 ($strict_export && !project_in_list($input))) {
1030                 return undef;
1031         } else {
1032                 return $input;
1033         }
1034 }
1035
1036 sub validate_pathname {
1037         my $input = shift || return undef;
1038
1039         # no '.' or '..' as elements of path, i.e. no '.' nor '..'
1040         # at the beginning, at the end, and between slashes.
1041         # also this catches doubled slashes
1042         if ($input =~ m!(^|/)(|\.|\.\.)(/|$)!) {
1043                 return undef;
1044         }
1045         # no null characters
1046         if ($input =~ m!\0!) {
1047                 return undef;
1048         }
1049         return $input;
1050 }
1051
1052 sub validate_refname {
1053         my $input = shift || return undef;
1054
1055         # textual hashes are O.K.
1056         if ($input =~ m/^[0-9a-fA-F]{40}$/) {
1057                 return $input;
1058         }
1059         # it must be correct pathname
1060         $input = validate_pathname($input)
1061                 or return undef;
1062         # restrictions on ref name according to git-check-ref-format
1063         if ($input =~ m!(/\.|\.\.|[\000-\040\177 ~^:?*\[]|/$)!) {
1064                 return undef;
1065         }
1066         return $input;
1067 }
1068
1069 # decode sequences of octets in utf8 into Perl's internal form,
1070 # which is utf-8 with utf8 flag set if needed.  gitweb writes out
1071 # in utf-8 thanks to "binmode STDOUT, ':utf8'" at beginning
1072 sub to_utf8 {
1073         my $str = shift;
1074         if (utf8::valid($str)) {
1075                 utf8::decode($str);
1076                 return $str;
1077         } else {
1078                 return decode($fallback_encoding, $str, Encode::FB_DEFAULT);
1079         }
1080 }
1081
1082 # quote unsafe chars, but keep the slash, even when it's not
1083 # correct, but quoted slashes look too horrible in bookmarks
1084 sub esc_param {
1085         my $str = shift;
1086         $str =~ s/([^A-Za-z0-9\-_.~()\/:@])/sprintf("%%%02X", ord($1))/eg;
1087         $str =~ s/\+/%2B/g;
1088         $str =~ s/ /\+/g;
1089         return $str;
1090 }
1091
1092 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1093 sub esc_url {
1094         my $str = shift;
1095         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1096         $str =~ s/\+/%2B/g;
1097         $str =~ s/ /\+/g;
1098         return $str;
1099 }
1100
1101 # replace invalid utf8 character with SUBSTITUTION sequence
1102 sub esc_html {
1103         my $str = shift;
1104         my %opts = @_;
1105
1106         $str = to_utf8($str);
1107         $str = $cgi->escapeHTML($str);
1108         if ($opts{'-nbsp'}) {
1109                 $str =~ s/ /&nbsp;/g;
1110         }
1111         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1112         return $str;
1113 }
1114
1115 # quote control characters and escape filename to HTML
1116 sub esc_path {
1117         my $str = shift;
1118         my %opts = @_;
1119
1120         $str = to_utf8($str);
1121         $str = $cgi->escapeHTML($str);
1122         if ($opts{'-nbsp'}) {
1123                 $str =~ s/ /&nbsp;/g;
1124         }
1125         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1126         return $str;
1127 }
1128
1129 # Make control characters "printable", using character escape codes (CEC)
1130 sub quot_cec {
1131         my $cntrl = shift;
1132         my %opts = @_;
1133         my %es = ( # character escape codes, aka escape sequences
1134                 "\t" => '\t',   # tab            (HT)
1135                 "\n" => '\n',   # line feed      (LF)
1136                 "\r" => '\r',   # carrige return (CR)
1137                 "\f" => '\f',   # form feed      (FF)
1138                 "\b" => '\b',   # backspace      (BS)
1139                 "\a" => '\a',   # alarm (bell)   (BEL)
1140                 "\e" => '\e',   # escape         (ESC)
1141                 "\013" => '\v', # vertical tab   (VT)
1142                 "\000" => '\0', # nul character  (NUL)
1143         );
1144         my $chr = ( (exists $es{$cntrl})
1145                     ? $es{$cntrl}
1146                     : sprintf('\%2x', ord($cntrl)) );
1147         if ($opts{-nohtml}) {
1148                 return $chr;
1149         } else {
1150                 return "<span class=\"cntrl\">$chr</span>";
1151         }
1152 }
1153
1154 # Alternatively use unicode control pictures codepoints,
1155 # Unicode "printable representation" (PR)
1156 sub quot_upr {
1157         my $cntrl = shift;
1158         my %opts = @_;
1159
1160         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1161         if ($opts{-nohtml}) {
1162                 return $chr;
1163         } else {
1164                 return "<span class=\"cntrl\">$chr</span>";
1165         }
1166 }
1167
1168 # git may return quoted and escaped filenames
1169 sub unquote {
1170         my $str = shift;
1171
1172         sub unq {
1173                 my $seq = shift;
1174                 my %es = ( # character escape codes, aka escape sequences
1175                         't' => "\t",   # tab            (HT, TAB)
1176                         'n' => "\n",   # newline        (NL)
1177                         'r' => "\r",   # return         (CR)
1178                         'f' => "\f",   # form feed      (FF)
1179                         'b' => "\b",   # backspace      (BS)
1180                         'a' => "\a",   # alarm (bell)   (BEL)
1181                         'e' => "\e",   # escape         (ESC)
1182                         'v' => "\013", # vertical tab   (VT)
1183                 );
1184
1185                 if ($seq =~ m/^[0-7]{1,3}$/) {
1186                         # octal char sequence
1187                         return chr(oct($seq));
1188                 } elsif (exists $es{$seq}) {
1189                         # C escape sequence, aka character escape code
1190                         return $es{$seq};
1191                 }
1192                 # quoted ordinary character
1193                 return $seq;
1194         }
1195
1196         if ($str =~ m/^"(.*)"$/) {
1197                 # needs unquoting
1198                 $str = $1;
1199                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1200         }
1201         return $str;
1202 }
1203
1204 # escape tabs (convert tabs to spaces)
1205 sub untabify {
1206         my $line = shift;
1207
1208         while ((my $pos = index($line, "\t")) != -1) {
1209                 if (my $count = (8 - ($pos % 8))) {
1210                         my $spaces = ' ' x $count;
1211                         $line =~ s/\t/$spaces/;
1212                 }
1213         }
1214
1215         return $line;
1216 }
1217
1218 sub project_in_list {
1219         my $project = shift;
1220         my @list = git_get_projects_list();
1221         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1222 }
1223
1224 ## ----------------------------------------------------------------------
1225 ## HTML aware string manipulation
1226
1227 # Try to chop given string on a word boundary between position
1228 # $len and $len+$add_len. If there is no word boundary there,
1229 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1230 # (marking chopped part) would be longer than given string.
1231 sub chop_str {
1232         my $str = shift;
1233         my $len = shift;
1234         my $add_len = shift || 10;
1235         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1236
1237         # Make sure perl knows it is utf8 encoded so we don't
1238         # cut in the middle of a utf8 multibyte char.
1239         $str = to_utf8($str);
1240
1241         # allow only $len chars, but don't cut a word if it would fit in $add_len
1242         # if it doesn't fit, cut it if it's still longer than the dots we would add
1243         # remove chopped character entities entirely
1244
1245         # when chopping in the middle, distribute $len into left and right part
1246         # return early if chopping wouldn't make string shorter
1247         if ($where eq 'center') {
1248                 return $str if ($len + 5 >= length($str)); # filler is length 5
1249                 $len = int($len/2);
1250         } else {
1251                 return $str if ($len + 4 >= length($str)); # filler is length 4
1252         }
1253
1254         # regexps: ending and beginning with word part up to $add_len
1255         my $endre = qr/.{$len}\w{0,$add_len}/;
1256         my $begre = qr/\w{0,$add_len}.{$len}/;
1257
1258         if ($where eq 'left') {
1259                 $str =~ m/^(.*?)($begre)$/;
1260                 my ($lead, $body) = ($1, $2);
1261                 if (length($lead) > 4) {
1262                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
1263                         $lead = " ...";
1264                 }
1265                 return "$lead$body";
1266
1267         } elsif ($where eq 'center') {
1268                 $str =~ m/^($endre)(.*)$/;
1269                 my ($left, $str)  = ($1, $2);
1270                 $str =~ m/^(.*?)($begre)$/;
1271                 my ($mid, $right) = ($1, $2);
1272                 if (length($mid) > 5) {
1273                         $left  =~ s/&[^;]*$//;
1274                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
1275                         $mid = " ... ";
1276                 }
1277                 return "$left$mid$right";
1278
1279         } else {
1280                 $str =~ m/^($endre)(.*)$/;
1281                 my $body = $1;
1282                 my $tail = $2;
1283                 if (length($tail) > 4) {
1284                         $body =~ s/&[^;]*$//;
1285                         $tail = "... ";
1286                 }
1287                 return "$body$tail";
1288         }
1289 }
1290
1291 # takes the same arguments as chop_str, but also wraps a <span> around the
1292 # result with a title attribute if it does get chopped. Additionally, the
1293 # string is HTML-escaped.
1294 sub chop_and_escape_str {
1295         my ($str) = @_;
1296
1297         my $chopped = chop_str(@_);
1298         if ($chopped eq $str) {
1299                 return esc_html($chopped);
1300         } else {
1301                 $str =~ s/[[:cntrl:]]/?/g;
1302                 return $cgi->span({-title=>$str}, esc_html($chopped));
1303         }
1304 }
1305
1306 ## ----------------------------------------------------------------------
1307 ## functions returning short strings
1308
1309 # CSS class for given age value (in seconds)
1310 sub age_class {
1311         my $age = shift;
1312
1313         if (!defined $age) {
1314                 return "noage";
1315         } elsif ($age < 60*60*2) {
1316                 return "age0";
1317         } elsif ($age < 60*60*24*2) {
1318                 return "age1";
1319         } else {
1320                 return "age2";
1321         }
1322 }
1323
1324 # convert age in seconds to "nn units ago" string
1325 sub age_string {
1326         my $age = shift;
1327         my $age_str;
1328
1329         if ($age > 60*60*24*365*2) {
1330                 $age_str = (int $age/60/60/24/365);
1331                 $age_str .= " years ago";
1332         } elsif ($age > 60*60*24*(365/12)*2) {
1333                 $age_str = int $age/60/60/24/(365/12);
1334                 $age_str .= " months ago";
1335         } elsif ($age > 60*60*24*7*2) {
1336                 $age_str = int $age/60/60/24/7;
1337                 $age_str .= " weeks ago";
1338         } elsif ($age > 60*60*24*2) {
1339                 $age_str = int $age/60/60/24;
1340                 $age_str .= " days ago";
1341         } elsif ($age > 60*60*2) {
1342                 $age_str = int $age/60/60;
1343                 $age_str .= " hours ago";
1344         } elsif ($age > 60*2) {
1345                 $age_str = int $age/60;
1346                 $age_str .= " min ago";
1347         } elsif ($age > 2) {
1348                 $age_str = int $age;
1349                 $age_str .= " sec ago";
1350         } else {
1351                 $age_str .= " right now";
1352         }
1353         return $age_str;
1354 }
1355
1356 use constant {
1357         S_IFINVALID => 0030000,
1358         S_IFGITLINK => 0160000,
1359 };
1360
1361 # submodule/subproject, a commit object reference
1362 sub S_ISGITLINK {
1363         my $mode = shift;
1364
1365         return (($mode & S_IFMT) == S_IFGITLINK)
1366 }
1367
1368 # convert file mode in octal to symbolic file mode string
1369 sub mode_str {
1370         my $mode = oct shift;
1371
1372         if (S_ISGITLINK($mode)) {
1373                 return 'm---------';
1374         } elsif (S_ISDIR($mode & S_IFMT)) {
1375                 return 'drwxr-xr-x';
1376         } elsif (S_ISLNK($mode)) {
1377                 return 'lrwxrwxrwx';
1378         } elsif (S_ISREG($mode)) {
1379                 # git cares only about the executable bit
1380                 if ($mode & S_IXUSR) {
1381                         return '-rwxr-xr-x';
1382                 } else {
1383                         return '-rw-r--r--';
1384                 };
1385         } else {
1386                 return '----------';
1387         }
1388 }
1389
1390 # convert file mode in octal to file type string
1391 sub file_type {
1392         my $mode = shift;
1393
1394         if ($mode !~ m/^[0-7]+$/) {
1395                 return $mode;
1396         } else {
1397                 $mode = oct $mode;
1398         }
1399
1400         if (S_ISGITLINK($mode)) {
1401                 return "submodule";
1402         } elsif (S_ISDIR($mode & S_IFMT)) {
1403                 return "directory";
1404         } elsif (S_ISLNK($mode)) {
1405                 return "symlink";
1406         } elsif (S_ISREG($mode)) {
1407                 return "file";
1408         } else {
1409                 return "unknown";
1410         }
1411 }
1412
1413 # convert file mode in octal to file type description string
1414 sub file_type_long {
1415         my $mode = shift;
1416
1417         if ($mode !~ m/^[0-7]+$/) {
1418                 return $mode;
1419         } else {
1420                 $mode = oct $mode;
1421         }
1422
1423         if (S_ISGITLINK($mode)) {
1424                 return "submodule";
1425         } elsif (S_ISDIR($mode & S_IFMT)) {
1426                 return "directory";
1427         } elsif (S_ISLNK($mode)) {
1428                 return "symlink";
1429         } elsif (S_ISREG($mode)) {
1430                 if ($mode & S_IXUSR) {
1431                         return "executable";
1432                 } else {
1433                         return "file";
1434                 };
1435         } else {
1436                 return "unknown";
1437         }
1438 }
1439
1440
1441 ## ----------------------------------------------------------------------
1442 ## functions returning short HTML fragments, or transforming HTML fragments
1443 ## which don't belong to other sections
1444
1445 # format line of commit message.
1446 sub format_log_line_html {
1447         my $line = shift;
1448
1449         $line = esc_html($line, -nbsp=>1);
1450         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1451                 $cgi->a({-href => href(action=>"object", hash=>$1),
1452                                         -class => "text"}, $1);
1453         }eg;
1454
1455         return $line;
1456 }
1457
1458 # format marker of refs pointing to given object
1459
1460 # the destination action is chosen based on object type and current context:
1461 # - for annotated tags, we choose the tag view unless it's the current view
1462 #   already, in which case we go to shortlog view
1463 # - for other refs, we keep the current view if we're in history, shortlog or
1464 #   log view, and select shortlog otherwise
1465 sub format_ref_marker {
1466         my ($refs, $id) = @_;
1467         my $markers = '';
1468
1469         if (defined $refs->{$id}) {
1470                 foreach my $ref (@{$refs->{$id}}) {
1471                         # this code exploits the fact that non-lightweight tags are the
1472                         # only indirect objects, and that they are the only objects for which
1473                         # we want to use tag instead of shortlog as action
1474                         my ($type, $name) = qw();
1475                         my $indirect = ($ref =~ s/\^\{\}$//);
1476                         # e.g. tags/v2.6.11 or heads/next
1477                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1478                                 $type = $1;
1479                                 $name = $2;
1480                         } else {
1481                                 $type = "ref";
1482                                 $name = $ref;
1483                         }
1484
1485                         my $class = $type;
1486                         $class .= " indirect" if $indirect;
1487
1488                         my $dest_action = "shortlog";
1489
1490                         if ($indirect) {
1491                                 $dest_action = "tag" unless $action eq "tag";
1492                         } elsif ($action =~ /^(history|(short)?log)$/) {
1493                                 $dest_action = $action;
1494                         }
1495
1496                         my $dest = "";
1497                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1498                         $dest .= $ref;
1499
1500                         my $link = $cgi->a({
1501                                 -href => href(
1502                                         action=>$dest_action,
1503                                         hash=>$dest
1504                                 )}, $name);
1505
1506                         $markers .= " <span class=\"$class\" title=\"$ref\">" .
1507                                 $link . "</span>";
1508                 }
1509         }
1510
1511         if ($markers) {
1512                 return ' <span class="refs">'. $markers . '</span>';
1513         } else {
1514                 return "";
1515         }
1516 }
1517
1518 # format, perhaps shortened and with markers, title line
1519 sub format_subject_html {
1520         my ($long, $short, $href, $extra) = @_;
1521         $extra = '' unless defined($extra);
1522
1523         if (length($short) < length($long)) {
1524                 $long =~ s/[[:cntrl:]]/?/g;
1525                 return $cgi->a({-href => $href, -class => "list subject",
1526                                 -title => to_utf8($long)},
1527                        esc_html($short)) . $extra;
1528         } else {
1529                 return $cgi->a({-href => $href, -class => "list subject"},
1530                        esc_html($long)) . $extra;
1531         }
1532 }
1533
1534 # Rather than recomputing the url for an email multiple times, we cache it
1535 # after the first hit. This gives a visible benefit in views where the avatar
1536 # for the same email is used repeatedly (e.g. shortlog).
1537 # The cache is shared by all avatar engines (currently gravatar only), which
1538 # are free to use it as preferred. Since only one avatar engine is used for any
1539 # given page, there's no risk for cache conflicts.
1540 our %avatar_cache = ();
1541
1542 # Compute the picon url for a given email, by using the picon search service over at
1543 # http://www.cs.indiana.edu/picons/search.html
1544 sub picon_url {
1545         my $email = lc shift;
1546         if (!$avatar_cache{$email}) {
1547                 my ($user, $domain) = split('@', $email);
1548                 $avatar_cache{$email} =
1549                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1550                         "$domain/$user/" .
1551                         "users+domains+unknown/up/single";
1552         }
1553         return $avatar_cache{$email};
1554 }
1555
1556 # Compute the gravatar url for a given email, if it's not in the cache already.
1557 # Gravatar stores only the part of the URL before the size, since that's the
1558 # one computationally more expensive. This also allows reuse of the cache for
1559 # different sizes (for this particular engine).
1560 sub gravatar_url {
1561         my $email = lc shift;
1562         my $size = shift;
1563         $avatar_cache{$email} ||=
1564                 "http://www.gravatar.com/avatar/" .
1565                         Digest::MD5::md5_hex($email) . "?s=";
1566         return $avatar_cache{$email} . $size;
1567 }
1568
1569 # Insert an avatar for the given $email at the given $size if the feature
1570 # is enabled.
1571 sub git_get_avatar {
1572         my ($email, %opts) = @_;
1573         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1574         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1575         $opts{-size} ||= 'default';
1576         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1577         my $url = "";
1578         if ($git_avatar eq 'gravatar') {
1579                 $url = gravatar_url($email, $size);
1580         } elsif ($git_avatar eq 'picon') {
1581                 $url = picon_url($email);
1582         }
1583         # Other providers can be added by extending the if chain, defining $url
1584         # as needed. If no variant puts something in $url, we assume avatars
1585         # are completely disabled/unavailable.
1586         if ($url) {
1587                 return $pre_white .
1588                        "<img width=\"$size\" " .
1589                             "class=\"avatar\" " .
1590                             "src=\"$url\" " .
1591                             "alt=\"\" " .
1592                        "/>" . $post_white;
1593         } else {
1594                 return "";
1595         }
1596 }
1597
1598 # format the author name of the given commit with the given tag
1599 # the author name is chopped and escaped according to the other
1600 # optional parameters (see chop_str).
1601 sub format_author_html {
1602         my $tag = shift;
1603         my $co = shift;
1604         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1605         return "<$tag class=\"author\">" .
1606                git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1607                $author . "</$tag>";
1608 }
1609
1610 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1611 sub format_git_diff_header_line {
1612         my $line = shift;
1613         my $diffinfo = shift;
1614         my ($from, $to) = @_;
1615
1616         if ($diffinfo->{'nparents'}) {
1617                 # combined diff
1618                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1619                 if ($to->{'href'}) {
1620                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1621                                          esc_path($to->{'file'}));
1622                 } else { # file was deleted (no href)
1623                         $line .= esc_path($to->{'file'});
1624                 }
1625         } else {
1626                 # "ordinary" diff
1627                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1628                 if ($from->{'href'}) {
1629                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1630                                          'a/' . esc_path($from->{'file'}));
1631                 } else { # file was added (no href)
1632                         $line .= 'a/' . esc_path($from->{'file'});
1633                 }
1634                 $line .= ' ';
1635                 if ($to->{'href'}) {
1636                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1637                                          'b/' . esc_path($to->{'file'}));
1638                 } else { # file was deleted
1639                         $line .= 'b/' . esc_path($to->{'file'});
1640                 }
1641         }
1642
1643         return "<div class=\"diff header\">$line</div>\n";
1644 }
1645
1646 # format extended diff header line, before patch itself
1647 sub format_extended_diff_header_line {
1648         my $line = shift;
1649         my $diffinfo = shift;
1650         my ($from, $to) = @_;
1651
1652         # match <path>
1653         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1654                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1655                                        esc_path($from->{'file'}));
1656         }
1657         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1658                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1659                                  esc_path($to->{'file'}));
1660         }
1661         # match single <mode>
1662         if ($line =~ m/\s(\d{6})$/) {
1663                 $line .= '<span class="info"> (' .
1664                          file_type_long($1) .
1665                          ')</span>';
1666         }
1667         # match <hash>
1668         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1669                 # can match only for combined diff
1670                 $line = 'index ';
1671                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1672                         if ($from->{'href'}[$i]) {
1673                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1674                                                   -class=>"hash"},
1675                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1676                         } else {
1677                                 $line .= '0' x 7;
1678                         }
1679                         # separator
1680                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1681                 }
1682                 $line .= '..';
1683                 if ($to->{'href'}) {
1684                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1685                                          substr($diffinfo->{'to_id'},0,7));
1686                 } else {
1687                         $line .= '0' x 7;
1688                 }
1689
1690         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1691                 # can match only for ordinary diff
1692                 my ($from_link, $to_link);
1693                 if ($from->{'href'}) {
1694                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1695                                              substr($diffinfo->{'from_id'},0,7));
1696                 } else {
1697                         $from_link = '0' x 7;
1698                 }
1699                 if ($to->{'href'}) {
1700                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1701                                            substr($diffinfo->{'to_id'},0,7));
1702                 } else {
1703                         $to_link = '0' x 7;
1704                 }
1705                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1706                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1707         }
1708
1709         return $line . "<br/>\n";
1710 }
1711
1712 # format from-file/to-file diff header
1713 sub format_diff_from_to_header {
1714         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1715         my $line;
1716         my $result = '';
1717
1718         $line = $from_line;
1719         #assert($line =~ m/^---/) if DEBUG;
1720         # no extra formatting for "^--- /dev/null"
1721         if (! $diffinfo->{'nparents'}) {
1722                 # ordinary (single parent) diff
1723                 if ($line =~ m!^--- "?a/!) {
1724                         if ($from->{'href'}) {
1725                                 $line = '--- a/' .
1726                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1727                                                 esc_path($from->{'file'}));
1728                         } else {
1729                                 $line = '--- a/' .
1730                                         esc_path($from->{'file'});
1731                         }
1732                 }
1733                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1734
1735         } else {
1736                 # combined diff (merge commit)
1737                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1738                         if ($from->{'href'}[$i]) {
1739                                 $line = '--- ' .
1740                                         $cgi->a({-href=>href(action=>"blobdiff",
1741                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1742                                                              hash_parent_base=>$parents[$i],
1743                                                              file_parent=>$from->{'file'}[$i],
1744                                                              hash=>$diffinfo->{'to_id'},
1745                                                              hash_base=>$hash,
1746                                                              file_name=>$to->{'file'}),
1747                                                  -class=>"path",
1748                                                  -title=>"diff" . ($i+1)},
1749                                                 $i+1) .
1750                                         '/' .
1751                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1752                                                 esc_path($from->{'file'}[$i]));
1753                         } else {
1754                                 $line = '--- /dev/null';
1755                         }
1756                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1757                 }
1758         }
1759
1760         $line = $to_line;
1761         #assert($line =~ m/^\+\+\+/) if DEBUG;
1762         # no extra formatting for "^+++ /dev/null"
1763         if ($line =~ m!^\+\+\+ "?b/!) {
1764                 if ($to->{'href'}) {
1765                         $line = '+++ b/' .
1766                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1767                                         esc_path($to->{'file'}));
1768                 } else {
1769                         $line = '+++ b/' .
1770                                 esc_path($to->{'file'});
1771                 }
1772         }
1773         $result .= qq!<div class="diff to_file">$line</div>\n!;
1774
1775         return $result;
1776 }
1777
1778 # create note for patch simplified by combined diff
1779 sub format_diff_cc_simplified {
1780         my ($diffinfo, @parents) = @_;
1781         my $result = '';
1782
1783         $result .= "<div class=\"diff header\">" .
1784                    "diff --cc ";
1785         if (!is_deleted($diffinfo)) {
1786                 $result .= $cgi->a({-href => href(action=>"blob",
1787                                                   hash_base=>$hash,
1788                                                   hash=>$diffinfo->{'to_id'},
1789                                                   file_name=>$diffinfo->{'to_file'}),
1790                                     -class => "path"},
1791                                    esc_path($diffinfo->{'to_file'}));
1792         } else {
1793                 $result .= esc_path($diffinfo->{'to_file'});
1794         }
1795         $result .= "</div>\n" . # class="diff header"
1796                    "<div class=\"diff nodifferences\">" .
1797                    "Simple merge" .
1798                    "</div>\n"; # class="diff nodifferences"
1799
1800         return $result;
1801 }
1802
1803 # format patch (diff) line (not to be used for diff headers)
1804 sub format_diff_line {
1805         my $line = shift;
1806         my ($from, $to) = @_;
1807         my $diff_class = "";
1808
1809         chomp $line;
1810
1811         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1812                 # combined diff
1813                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1814                 if ($line =~ m/^\@{3}/) {
1815                         $diff_class = " chunk_header";
1816                 } elsif ($line =~ m/^\\/) {
1817                         $diff_class = " incomplete";
1818                 } elsif ($prefix =~ tr/+/+/) {
1819                         $diff_class = " add";
1820                 } elsif ($prefix =~ tr/-/-/) {
1821                         $diff_class = " rem";
1822                 }
1823         } else {
1824                 # assume ordinary diff
1825                 my $char = substr($line, 0, 1);
1826                 if ($char eq '+') {
1827                         $diff_class = " add";
1828                 } elsif ($char eq '-') {
1829                         $diff_class = " rem";
1830                 } elsif ($char eq '@') {
1831                         $diff_class = " chunk_header";
1832                 } elsif ($char eq "\\") {
1833                         $diff_class = " incomplete";
1834                 }
1835         }
1836         $line = untabify($line);
1837         if ($from && $to && $line =~ m/^\@{2} /) {
1838                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1839                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1840
1841                 $from_lines = 0 unless defined $from_lines;
1842                 $to_lines   = 0 unless defined $to_lines;
1843
1844                 if ($from->{'href'}) {
1845                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1846                                              -class=>"list"}, $from_text);
1847                 }
1848                 if ($to->{'href'}) {
1849                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1850                                              -class=>"list"}, $to_text);
1851                 }
1852                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1853                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1854                 return "<div class=\"diff$diff_class\">$line</div>\n";
1855         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1856                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1857                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1858
1859                 @from_text = split(' ', $ranges);
1860                 for (my $i = 0; $i < @from_text; ++$i) {
1861                         ($from_start[$i], $from_nlines[$i]) =
1862                                 (split(',', substr($from_text[$i], 1)), 0);
1863                 }
1864
1865                 $to_text   = pop @from_text;
1866                 $to_start  = pop @from_start;
1867                 $to_nlines = pop @from_nlines;
1868
1869                 $line = "<span class=\"chunk_info\">$prefix ";
1870                 for (my $i = 0; $i < @from_text; ++$i) {
1871                         if ($from->{'href'}[$i]) {
1872                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1873                                                   -class=>"list"}, $from_text[$i]);
1874                         } else {
1875                                 $line .= $from_text[$i];
1876                         }
1877                         $line .= " ";
1878                 }
1879                 if ($to->{'href'}) {
1880                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1881                                           -class=>"list"}, $to_text);
1882                 } else {
1883                         $line .= $to_text;
1884                 }
1885                 $line .= " $prefix</span>" .
1886                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1887                 return "<div class=\"diff$diff_class\">$line</div>\n";
1888         }
1889         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1890 }
1891
1892 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1893 # linked.  Pass the hash of the tree/commit to snapshot.
1894 sub format_snapshot_links {
1895         my ($hash) = @_;
1896         my $num_fmts = @snapshot_fmts;
1897         if ($num_fmts > 1) {
1898                 # A parenthesized list of links bearing format names.
1899                 # e.g. "snapshot (_tar.gz_ _zip_)"
1900                 return "snapshot (" . join(' ', map
1901                         $cgi->a({
1902                                 -href => href(
1903                                         action=>"snapshot",
1904                                         hash=>$hash,
1905                                         snapshot_format=>$_
1906                                 )
1907                         }, $known_snapshot_formats{$_}{'display'})
1908                 , @snapshot_fmts) . ")";
1909         } elsif ($num_fmts == 1) {
1910                 # A single "snapshot" link whose tooltip bears the format name.
1911                 # i.e. "_snapshot_"
1912                 my ($fmt) = @snapshot_fmts;
1913                 return
1914                         $cgi->a({
1915                                 -href => href(
1916                                         action=>"snapshot",
1917                                         hash=>$hash,
1918                                         snapshot_format=>$fmt
1919                                 ),
1920                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1921                         }, "snapshot");
1922         } else { # $num_fmts == 0
1923                 return undef;
1924         }
1925 }
1926
1927 ## ......................................................................
1928 ## functions returning values to be passed, perhaps after some
1929 ## transformation, to other functions; e.g. returning arguments to href()
1930
1931 # returns hash to be passed to href to generate gitweb URL
1932 # in -title key it returns description of link
1933 sub get_feed_info {
1934         my $format = shift || 'Atom';
1935         my %res = (action => lc($format));
1936
1937         # feed links are possible only for project views
1938         return unless (defined $project);
1939         # some views should link to OPML, or to generic project feed,
1940         # or don't have specific feed yet (so they should use generic)
1941         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1942
1943         my $branch;
1944         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1945         # from tag links; this also makes possible to detect branch links
1946         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1947             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1948                 $branch = $1;
1949         }
1950         # find log type for feed description (title)
1951         my $type = 'log';
1952         if (defined $file_name) {
1953                 $type  = "history of $file_name";
1954                 $type .= "/" if ($action eq 'tree');
1955                 $type .= " on '$branch'" if (defined $branch);
1956         } else {
1957                 $type = "log of $branch" if (defined $branch);
1958         }
1959
1960         $res{-title} = $type;
1961         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1962         $res{'file_name'} = $file_name;
1963
1964         return %res;
1965 }
1966
1967 ## ----------------------------------------------------------------------
1968 ## git utility subroutines, invoking git commands
1969
1970 # returns path to the core git executable and the --git-dir parameter as list
1971 sub git_cmd {
1972         return $GIT, '--git-dir='.$git_dir;
1973 }
1974
1975 # quote the given arguments for passing them to the shell
1976 # quote_command("command", "arg 1", "arg with ' and ! characters")
1977 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1978 # Try to avoid using this function wherever possible.
1979 sub quote_command {
1980         return join(' ',
1981                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
1982 }
1983
1984 # get HEAD ref of given project as hash
1985 sub git_get_head_hash {
1986         my $project = shift;
1987         my $o_git_dir = $git_dir;
1988         my $retval = undef;
1989         $git_dir = "$projectroot/$project";
1990         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1991                 my $head = <$fd>;
1992                 close $fd;
1993                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
1994                         $retval = $1;
1995                 }
1996         }
1997         if (defined $o_git_dir) {
1998                 $git_dir = $o_git_dir;
1999         }
2000         return $retval;
2001 }
2002
2003 # get type of given object
2004 sub git_get_type {
2005         my $hash = shift;
2006
2007         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2008         my $type = <$fd>;
2009         close $fd or return;
2010         chomp $type;
2011         return $type;
2012 }
2013
2014 # repository configuration
2015 our $config_file = '';
2016 our %config;
2017
2018 # store multiple values for single key as anonymous array reference
2019 # single values stored directly in the hash, not as [ <value> ]
2020 sub hash_set_multi {
2021         my ($hash, $key, $value) = @_;
2022
2023         if (!exists $hash->{$key}) {
2024                 $hash->{$key} = $value;
2025         } elsif (!ref $hash->{$key}) {
2026                 $hash->{$key} = [ $hash->{$key}, $value ];
2027         } else {
2028                 push @{$hash->{$key}}, $value;
2029         }
2030 }
2031
2032 # return hash of git project configuration
2033 # optionally limited to some section, e.g. 'gitweb'
2034 sub git_parse_project_config {
2035         my $section_regexp = shift;
2036         my %config;
2037
2038         local $/ = "\0";
2039
2040         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2041                 or return;
2042
2043         while (my $keyval = <$fh>) {
2044                 chomp $keyval;
2045                 my ($key, $value) = split(/\n/, $keyval, 2);
2046
2047                 hash_set_multi(\%config, $key, $value)
2048                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2049         }
2050         close $fh;
2051
2052         return %config;
2053 }
2054
2055 # convert config value to boolean: 'true' or 'false'
2056 # no value, number > 0, 'true' and 'yes' values are true
2057 # rest of values are treated as false (never as error)
2058 sub config_to_bool {
2059         my $val = shift;
2060
2061         return 1 if !defined $val;             # section.key
2062
2063         # strip leading and trailing whitespace
2064         $val =~ s/^\s+//;
2065         $val =~ s/\s+$//;
2066
2067         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2068                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2069 }
2070
2071 # convert config value to simple decimal number
2072 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2073 # to be multiplied by 1024, 1048576, or 1073741824
2074 sub config_to_int {
2075         my $val = shift;
2076
2077         # strip leading and trailing whitespace
2078         $val =~ s/^\s+//;
2079         $val =~ s/\s+$//;
2080
2081         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2082                 $unit = lc($unit);
2083                 # unknown unit is treated as 1
2084                 return $num * ($unit eq 'g' ? 1073741824 :
2085                                $unit eq 'm' ?    1048576 :
2086                                $unit eq 'k' ?       1024 : 1);
2087         }
2088         return $val;
2089 }
2090
2091 # convert config value to array reference, if needed
2092 sub config_to_multi {
2093         my $val = shift;
2094
2095         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2096 }
2097
2098 sub git_get_project_config {
2099         my ($key, $type) = @_;
2100
2101         # key sanity check
2102         return unless ($key);
2103         $key =~ s/^gitweb\.//;
2104         return if ($key =~ m/\W/);
2105
2106         # type sanity check
2107         if (defined $type) {
2108                 $type =~ s/^--//;
2109                 $type = undef
2110                         unless ($type eq 'bool' || $type eq 'int');
2111         }
2112
2113         # get config
2114         if (!defined $config_file ||
2115             $config_file ne "$git_dir/config") {
2116                 %config = git_parse_project_config('gitweb');
2117                 $config_file = "$git_dir/config";
2118         }
2119
2120         # check if config variable (key) exists
2121         return unless exists $config{"gitweb.$key"};
2122
2123         # ensure given type
2124         if (!defined $type) {
2125                 return $config{"gitweb.$key"};
2126         } elsif ($type eq 'bool') {
2127                 # backward compatibility: 'git config --bool' returns true/false
2128                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2129         } elsif ($type eq 'int') {
2130                 return config_to_int($config{"gitweb.$key"});
2131         }
2132         return $config{"gitweb.$key"};
2133 }
2134
2135 # get hash of given path at given ref
2136 sub git_get_hash_by_path {
2137         my $base = shift;
2138         my $path = shift || return undef;
2139         my $type = shift;
2140
2141         $path =~ s,/+$,,;
2142
2143         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2144                 or die_error(500, "Open git-ls-tree failed");
2145         my $line = <$fd>;
2146         close $fd or return undef;
2147
2148         if (!defined $line) {
2149                 # there is no tree or hash given by $path at $base
2150                 return undef;
2151         }
2152
2153         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2154         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2155         if (defined $type && $type ne $2) {
2156                 # type doesn't match
2157                 return undef;
2158         }
2159         return $3;
2160 }
2161
2162 # get path of entry with given hash at given tree-ish (ref)
2163 # used to get 'from' filename for combined diff (merge commit) for renames
2164 sub git_get_path_by_hash {
2165         my $base = shift || return;
2166         my $hash = shift || return;
2167
2168         local $/ = "\0";
2169
2170         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2171                 or return undef;
2172         while (my $line = <$fd>) {
2173                 chomp $line;
2174
2175                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2176                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2177                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2178                         close $fd;
2179                         return $1;
2180                 }
2181         }
2182         close $fd;
2183         return undef;
2184 }
2185
2186 ## ......................................................................
2187 ## git utility functions, directly accessing git repository
2188
2189 sub git_get_project_description {
2190         my $path = shift;
2191
2192         $git_dir = "$projectroot/$path";
2193         open my $fd, '<', "$git_dir/description"
2194                 or return git_get_project_config('description');
2195         my $descr = <$fd>;
2196         close $fd;
2197         if (defined $descr) {
2198                 chomp $descr;
2199         }
2200         return $descr;
2201 }
2202
2203 sub git_get_project_ctags {
2204         my $path = shift;
2205         my $ctags = {};
2206
2207         $git_dir = "$projectroot/$path";
2208         opendir my $dh, "$git_dir/ctags"
2209                 or return $ctags;
2210         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2211                 open my $ct, '<', $_ or next;
2212                 my $val = <$ct>;
2213                 chomp $val;
2214                 close $ct;
2215                 my $ctag = $_; $ctag =~ s#.*/##;
2216                 $ctags->{$ctag} = $val;
2217         }
2218         closedir $dh;
2219         $ctags;
2220 }
2221
2222 sub git_populate_project_tagcloud {
2223         my $ctags = shift;
2224
2225         # First, merge different-cased tags; tags vote on casing
2226         my %ctags_lc;
2227         foreach (keys %$ctags) {
2228                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2229                 if (not $ctags_lc{lc $_}->{topcount}
2230                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2231                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2232                         $ctags_lc{lc $_}->{topname} = $_;
2233                 }
2234         }
2235
2236         my $cloud;
2237         if (eval { require HTML::TagCloud; 1; }) {
2238                 $cloud = HTML::TagCloud->new;
2239                 foreach (sort keys %ctags_lc) {
2240                         # Pad the title with spaces so that the cloud looks
2241                         # less crammed.
2242                         my $title = $ctags_lc{$_}->{topname};
2243                         $title =~ s/ /&nbsp;/g;
2244                         $title =~ s/^/&nbsp;/g;
2245                         $title =~ s/$/&nbsp;/g;
2246                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2247                 }
2248         } else {
2249                 $cloud = \%ctags_lc;
2250         }
2251         $cloud;
2252 }
2253
2254 sub git_show_project_tagcloud {
2255         my ($cloud, $count) = @_;
2256         print STDERR ref($cloud)."..\n";
2257         if (ref $cloud eq 'HTML::TagCloud') {
2258                 return $cloud->html_and_css($count);
2259         } else {
2260                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2261                 return '<p align="center">' . join (', ', map {
2262                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2263                 } splice(@tags, 0, $count)) . '</p>';
2264         }
2265 }
2266
2267 sub git_get_project_url_list {
2268         my $path = shift;
2269
2270         $git_dir = "$projectroot/$path";
2271         open my $fd, '<', "$git_dir/cloneurl"
2272                 or return wantarray ?
2273                 @{ config_to_multi(git_get_project_config('url')) } :
2274                    config_to_multi(git_get_project_config('url'));
2275         my @git_project_url_list = map { chomp; $_ } <$fd>;
2276         close $fd;
2277
2278         return wantarray ? @git_project_url_list : \@git_project_url_list;
2279 }
2280
2281 sub git_get_projects_list {
2282         my ($filter) = @_;
2283         my @list;
2284
2285         $filter ||= '';
2286         $filter =~ s/\.git$//;
2287
2288         my $check_forks = gitweb_check_feature('forks');
2289
2290         if (-d $projects_list) {
2291                 # search in directory
2292                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2293                 # remove the trailing "/"
2294                 $dir =~ s!/+$!!;
2295                 my $pfxlen = length("$dir");
2296                 my $pfxdepth = ($dir =~ tr!/!!);
2297
2298                 File::Find::find({
2299                         follow_fast => 1, # follow symbolic links
2300                         follow_skip => 2, # ignore duplicates
2301                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2302                         wanted => sub {
2303                                 # skip project-list toplevel, if we get it.
2304                                 return if (m!^[/.]$!);
2305                                 # only directories can be git repositories
2306                                 return unless (-d $_);
2307                                 # don't traverse too deep (Find is super slow on os x)
2308                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2309                                         $File::Find::prune = 1;
2310                                         return;
2311                                 }
2312
2313                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2314                                 # we check related file in $projectroot
2315                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2316                                 if (check_export_ok("$projectroot/$path")) {
2317                                         push @list, { path => $path };
2318                                         $File::Find::prune = 1;
2319                                 }
2320                         },
2321                 }, "$dir");
2322
2323         } elsif (-f $projects_list) {
2324                 # read from file(url-encoded):
2325                 # 'git%2Fgit.git Linus+Torvalds'
2326                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2327                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2328                 my %paths;
2329                 open my $fd, '<', $projects_list or return;
2330         PROJECT:
2331                 while (my $line = <$fd>) {
2332                         chomp $line;
2333                         my ($path, $owner) = split ' ', $line;
2334                         $path = unescape($path);
2335                         $owner = unescape($owner);
2336                         if (!defined $path) {
2337                                 next;
2338                         }
2339                         if ($filter ne '') {
2340                                 # looking for forks;
2341                                 my $pfx = substr($path, 0, length($filter));
2342                                 if ($pfx ne $filter) {
2343                                         next PROJECT;
2344                                 }
2345                                 my $sfx = substr($path, length($filter));
2346                                 if ($sfx !~ /^\/.*\.git$/) {
2347                                         next PROJECT;
2348                                 }
2349                         } elsif ($check_forks) {
2350                         PATH:
2351                                 foreach my $filter (keys %paths) {
2352                                         # looking for forks;
2353                                         my $pfx = substr($path, 0, length($filter));
2354                                         if ($pfx ne $filter) {
2355                                                 next PATH;
2356                                         }
2357                                         my $sfx = substr($path, length($filter));
2358                                         if ($sfx !~ /^\/.*\.git$/) {
2359                                                 next PATH;
2360                                         }
2361                                         # is a fork, don't include it in
2362                                         # the list
2363                                         next PROJECT;
2364                                 }
2365                         }
2366                         if (check_export_ok("$projectroot/$path")) {
2367                                 my $pr = {
2368                                         path => $path,
2369                                         owner => to_utf8($owner),
2370                                 };
2371                                 push @list, $pr;
2372                                 (my $forks_path = $path) =~ s/\.git$//;
2373                                 $paths{$forks_path}++;
2374                         }
2375                 }
2376                 close $fd;
2377         }
2378         return @list;
2379 }
2380
2381 our $gitweb_project_owner = undef;
2382 sub git_get_project_list_from_file {
2383
2384         return if (defined $gitweb_project_owner);
2385
2386         $gitweb_project_owner = {};
2387         # read from file (url-encoded):
2388         # 'git%2Fgit.git Linus+Torvalds'
2389         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2390         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2391         if (-f $projects_list) {
2392                 open(my $fd, '<', $projects_list);
2393                 while (my $line = <$fd>) {
2394                         chomp $line;
2395                         my ($pr, $ow) = split ' ', $line;
2396                         $pr = unescape($pr);
2397                         $ow = unescape($ow);
2398                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2399                 }
2400                 close $fd;
2401         }
2402 }
2403
2404 sub git_get_project_owner {
2405         my $project = shift;
2406         my $owner;
2407
2408         return undef unless $project;
2409         $git_dir = "$projectroot/$project";
2410
2411         if (!defined $gitweb_project_owner) {
2412                 git_get_project_list_from_file();
2413         }
2414
2415         if (exists $gitweb_project_owner->{$project}) {
2416                 $owner = $gitweb_project_owner->{$project};
2417         }
2418         if (!defined $owner){
2419                 $owner = git_get_project_config('owner');
2420         }
2421         if (!defined $owner) {
2422                 $owner = get_file_owner("$git_dir");
2423         }
2424
2425         return $owner;
2426 }
2427
2428 sub git_get_last_activity {
2429         my ($path) = @_;
2430         my $fd;
2431
2432         $git_dir = "$projectroot/$path";
2433         open($fd, "-|", git_cmd(), 'for-each-ref',
2434              '--format=%(committer)',
2435              '--sort=-committerdate',
2436              '--count=1',
2437              'refs/heads') or return;
2438         my $most_recent = <$fd>;
2439         close $fd or return;
2440         if (defined $most_recent &&
2441             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2442                 my $timestamp = $1;
2443                 my $age = time - $timestamp;
2444                 return ($age, age_string($age));
2445         }
2446         return (undef, undef);
2447 }
2448
2449 sub git_get_references {
2450         my $type = shift || "";
2451         my %refs;
2452         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2453         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2454         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2455                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2456                 or return;
2457
2458         while (my $line = <$fd>) {
2459                 chomp $line;
2460                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2461                         if (defined $refs{$1}) {
2462                                 push @{$refs{$1}}, $2;
2463                         } else {
2464                                 $refs{$1} = [ $2 ];
2465                         }
2466                 }
2467         }
2468         close $fd or return;
2469         return \%refs;
2470 }
2471
2472 sub git_get_rev_name_tags {
2473         my $hash = shift || return undef;
2474
2475         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2476                 or return;
2477         my $name_rev = <$fd>;
2478         close $fd;
2479
2480         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2481                 return $1;
2482         } else {
2483                 # catches also '$hash undefined' output
2484                 return undef;
2485         }
2486 }
2487
2488 ## ----------------------------------------------------------------------
2489 ## parse to hash functions
2490
2491 sub parse_date {
2492         my $epoch = shift;
2493         my $tz = shift || "-0000";
2494
2495         my %date;
2496         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2497         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2498         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2499         $date{'hour'} = $hour;
2500         $date{'minute'} = $min;
2501         $date{'mday'} = $mday;
2502         $date{'day'} = $days[$wday];
2503         $date{'month'} = $months[$mon];
2504         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2505                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2506         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2507                              $mday, $months[$mon], $hour ,$min;
2508         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2509                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2510
2511         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2512         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2513         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2514         $date{'hour_local'} = $hour;
2515         $date{'minute_local'} = $min;
2516         $date{'tz_local'} = $tz;
2517         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2518                                   1900+$year, $mon+1, $mday,
2519                                   $hour, $min, $sec, $tz);
2520         return %date;
2521 }
2522
2523 sub parse_tag {
2524         my $tag_id = shift;
2525         my %tag;
2526         my @comment;
2527
2528         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2529         $tag{'id'} = $tag_id;
2530         while (my $line = <$fd>) {
2531                 chomp $line;
2532                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2533                         $tag{'object'} = $1;
2534                 } elsif ($line =~ m/^type (.+)$/) {
2535                         $tag{'type'} = $1;
2536                 } elsif ($line =~ m/^tag (.+)$/) {
2537                         $tag{'name'} = $1;
2538                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2539                         $tag{'author'} = $1;
2540                         $tag{'author_epoch'} = $2;
2541                         $tag{'author_tz'} = $3;
2542                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2543                                 $tag{'author_name'}  = $1;
2544                                 $tag{'author_email'} = $2;
2545                         } else {
2546                                 $tag{'author_name'} = $tag{'author'};
2547                         }
2548                 } elsif ($line =~ m/--BEGIN/) {
2549                         push @comment, $line;
2550                         last;
2551                 } elsif ($line eq "") {
2552                         last;
2553                 }
2554         }
2555         push @comment, <$fd>;
2556         $tag{'comment'} = \@comment;
2557         close $fd or return;
2558         if (!defined $tag{'name'}) {
2559                 return
2560         };
2561         return %tag
2562 }
2563
2564 sub parse_commit_text {
2565         my ($commit_text, $withparents) = @_;
2566         my @commit_lines = split '\n', $commit_text;
2567         my %co;
2568
2569         pop @commit_lines; # Remove '\0'
2570
2571         if (! @commit_lines) {
2572                 return;
2573         }
2574
2575         my $header = shift @commit_lines;
2576         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2577                 return;
2578         }
2579         ($co{'id'}, my @parents) = split ' ', $header;
2580         while (my $line = shift @commit_lines) {
2581                 last if $line eq "\n";
2582                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2583                         $co{'tree'} = $1;
2584                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2585                         push @parents, $1;
2586                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2587                         $co{'author'} = to_utf8($1);
2588                         $co{'author_epoch'} = $2;
2589                         $co{'author_tz'} = $3;
2590                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2591                                 $co{'author_name'}  = $1;
2592                                 $co{'author_email'} = $2;
2593                         } else {
2594                                 $co{'author_name'} = $co{'author'};
2595                         }
2596                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2597                         $co{'committer'} = to_utf8($1);
2598                         $co{'committer_epoch'} = $2;
2599                         $co{'committer_tz'} = $3;
2600                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2601                                 $co{'committer_name'}  = $1;
2602                                 $co{'committer_email'} = $2;
2603                         } else {
2604                                 $co{'committer_name'} = $co{'committer'};
2605                         }
2606                 }
2607         }
2608         if (!defined $co{'tree'}) {
2609                 return;
2610         };
2611         $co{'parents'} = \@parents;
2612         $co{'parent'} = $parents[0];
2613
2614         foreach my $title (@commit_lines) {
2615                 $title =~ s/^    //;
2616                 if ($title ne "") {
2617                         $co{'title'} = chop_str($title, 80, 5);
2618                         # remove leading stuff of merges to make the interesting part visible
2619                         if (length($title) > 50) {
2620                                 $title =~ s/^Automatic //;
2621                                 $title =~ s/^merge (of|with) /Merge ... /i;
2622                                 if (length($title) > 50) {
2623                                         $title =~ s/(http|rsync):\/\///;
2624                                 }
2625                                 if (length($title) > 50) {
2626                                         $title =~ s/(master|www|rsync)\.//;
2627                                 }
2628                                 if (length($title) > 50) {
2629                                         $title =~ s/kernel.org:?//;
2630                                 }
2631                                 if (length($title) > 50) {
2632                                         $title =~ s/\/pub\/scm//;
2633                                 }
2634                         }
2635                         $co{'title_short'} = chop_str($title, 50, 5);
2636                         last;
2637                 }
2638         }
2639         if (! defined $co{'title'} || $co{'title'} eq "") {
2640                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2641         }
2642         # remove added spaces
2643         foreach my $line (@commit_lines) {
2644                 $line =~ s/^    //;
2645         }
2646         $co{'comment'} = \@commit_lines;
2647
2648         my $age = time - $co{'committer_epoch'};
2649         $co{'age'} = $age;
2650         $co{'age_string'} = age_string($age);
2651         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2652         if ($age > 60*60*24*7*2) {
2653                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2654                 $co{'age_string_age'} = $co{'age_string'};
2655         } else {
2656                 $co{'age_string_date'} = $co{'age_string'};
2657                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2658         }
2659         return %co;
2660 }
2661
2662 sub parse_commit {
2663         my ($commit_id) = @_;
2664         my %co;
2665
2666         local $/ = "\0";
2667
2668         open my $fd, "-|", git_cmd(), "rev-list",
2669                 "--parents",
2670                 "--header",
2671                 "--max-count=1",
2672                 $commit_id,
2673                 "--",
2674                 or die_error(500, "Open git-rev-list failed");
2675         %co = parse_commit_text(<$fd>, 1);
2676         close $fd;
2677
2678         return %co;
2679 }
2680
2681 sub parse_commits {
2682         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2683         my @cos;
2684
2685         $maxcount ||= 1;
2686         $skip ||= 0;
2687
2688         local $/ = "\0";
2689
2690         open my $fd, "-|", git_cmd(), "rev-list",
2691                 "--header",
2692                 @args,
2693                 ("--max-count=" . $maxcount),
2694                 ("--skip=" . $skip),
2695                 @extra_options,
2696                 $commit_id,
2697                 "--",
2698                 ($filename ? ($filename) : ())
2699                 or die_error(500, "Open git-rev-list failed");
2700         while (my $line = <$fd>) {
2701                 my %co = parse_commit_text($line);
2702                 push @cos, \%co;
2703         }
2704         close $fd;
2705
2706         return wantarray ? @cos : \@cos;
2707 }
2708
2709 # parse line of git-diff-tree "raw" output
2710 sub parse_difftree_raw_line {
2711         my $line = shift;
2712         my %res;
2713
2714         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2715         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2716         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2717                 $res{'from_mode'} = $1;
2718                 $res{'to_mode'} = $2;
2719                 $res{'from_id'} = $3;
2720                 $res{'to_id'} = $4;
2721                 $res{'status'} = $5;
2722                 $res{'similarity'} = $6;
2723                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2724                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2725                 } else {
2726                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2727                 }
2728         }
2729         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2730         # combined diff (for merge commit)
2731         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2732                 $res{'nparents'}  = length($1);
2733                 $res{'from_mode'} = [ split(' ', $2) ];
2734                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2735                 $res{'from_id'} = [ split(' ', $3) ];
2736                 $res{'to_id'} = pop @{$res{'from_id'}};
2737                 $res{'status'} = [ split('', $4) ];
2738                 $res{'to_file'} = unquote($5);
2739         }
2740         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2741         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2742                 $res{'commit'} = $1;
2743         }
2744
2745         return wantarray ? %res : \%res;
2746 }
2747
2748 # wrapper: return parsed line of git-diff-tree "raw" output
2749 # (the argument might be raw line, or parsed info)
2750 sub parsed_difftree_line {
2751         my $line_or_ref = shift;
2752
2753         if (ref($line_or_ref) eq "HASH") {
2754                 # pre-parsed (or generated by hand)
2755                 return $line_or_ref;
2756         } else {
2757                 return parse_difftree_raw_line($line_or_ref);
2758         }
2759 }
2760
2761 # parse line of git-ls-tree output
2762 sub parse_ls_tree_line {
2763         my $line = shift;
2764         my %opts = @_;
2765         my %res;
2766
2767         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2768         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2769
2770         $res{'mode'} = $1;
2771         $res{'type'} = $2;
2772         $res{'hash'} = $3;
2773         if ($opts{'-z'}) {
2774                 $res{'name'} = $4;
2775         } else {
2776                 $res{'name'} = unquote($4);
2777         }
2778
2779         return wantarray ? %res : \%res;
2780 }
2781
2782 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2783 sub parse_from_to_diffinfo {
2784         my ($diffinfo, $from, $to, @parents) = @_;
2785
2786         if ($diffinfo->{'nparents'}) {
2787                 # combined diff
2788                 $from->{'file'} = [];
2789                 $from->{'href'} = [];
2790                 fill_from_file_info($diffinfo, @parents)
2791                         unless exists $diffinfo->{'from_file'};
2792                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2793                         $from->{'file'}[$i] =
2794                                 defined $diffinfo->{'from_file'}[$i] ?
2795                                         $diffinfo->{'from_file'}[$i] :
2796                                         $diffinfo->{'to_file'};
2797                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2798                                 $from->{'href'}[$i] = href(action=>"blob",
2799                                                            hash_base=>$parents[$i],
2800                                                            hash=>$diffinfo->{'from_id'}[$i],
2801                                                            file_name=>$from->{'file'}[$i]);
2802                         } else {
2803                                 $from->{'href'}[$i] = undef;
2804                         }
2805                 }
2806         } else {
2807                 # ordinary (not combined) diff
2808                 $from->{'file'} = $diffinfo->{'from_file'};
2809                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2810                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2811                                                hash=>$diffinfo->{'from_id'},
2812                                                file_name=>$from->{'file'});
2813                 } else {
2814                         delete $from->{'href'};
2815                 }
2816         }
2817
2818         $to->{'file'} = $diffinfo->{'to_file'};
2819         if (!is_deleted($diffinfo)) { # file exists in result
2820                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2821                                      hash=>$diffinfo->{'to_id'},
2822                                      file_name=>$to->{'file'});
2823         } else {
2824                 delete $to->{'href'};
2825         }
2826 }
2827
2828 ## ......................................................................
2829 ## parse to array of hashes functions
2830
2831 sub git_get_heads_list {
2832         my $limit = shift;
2833         my @headslist;
2834
2835         open my $fd, '-|', git_cmd(), 'for-each-ref',
2836                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2837                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2838                 'refs/heads'
2839                 or return;
2840         while (my $line = <$fd>) {
2841                 my %ref_item;
2842
2843                 chomp $line;
2844                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2845                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2846                 my ($committer, $epoch, $tz) =
2847                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2848                 $ref_item{'fullname'}  = $name;
2849                 $name =~ s!^refs/heads/!!;
2850
2851                 $ref_item{'name'}  = $name;
2852                 $ref_item{'id'}    = $hash;
2853                 $ref_item{'title'} = $title || '(no commit message)';
2854                 $ref_item{'epoch'} = $epoch;
2855                 if ($epoch) {
2856                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2857                 } else {
2858                         $ref_item{'age'} = "unknown";
2859                 }
2860
2861                 push @headslist, \%ref_item;
2862         }
2863         close $fd;
2864
2865         return wantarray ? @headslist : \@headslist;
2866 }
2867
2868 sub git_get_tags_list {
2869         my $limit = shift;
2870         my @tagslist;
2871
2872         open my $fd, '-|', git_cmd(), 'for-each-ref',
2873                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2874                 '--format=%(objectname) %(objecttype) %(refname) '.
2875                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2876                 'refs/tags'
2877                 or return;
2878         while (my $line = <$fd>) {
2879                 my %ref_item;
2880
2881                 chomp $line;
2882                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2883                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2884                 my ($creator, $epoch, $tz) =
2885                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2886                 $ref_item{'fullname'} = $name;
2887                 $name =~ s!^refs/tags/!!;
2888
2889                 $ref_item{'type'} = $type;
2890                 $ref_item{'id'} = $id;
2891                 $ref_item{'name'} = $name;
2892                 if ($type eq "tag") {
2893                         $ref_item{'subject'} = $title;
2894                         $ref_item{'reftype'} = $reftype;
2895                         $ref_item{'refid'}   = $refid;
2896                 } else {
2897                         $ref_item{'reftype'} = $type;
2898                         $ref_item{'refid'}   = $id;
2899                 }
2900
2901                 if ($type eq "tag" || $type eq "commit") {
2902                         $ref_item{'epoch'} = $epoch;
2903                         if ($epoch) {
2904                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2905                         } else {
2906                                 $ref_item{'age'} = "unknown";
2907                         }
2908                 }
2909
2910                 push @tagslist, \%ref_item;
2911         }
2912         close $fd;
2913
2914         return wantarray ? @tagslist : \@tagslist;
2915 }
2916
2917 ## ----------------------------------------------------------------------
2918 ## filesystem-related functions
2919
2920 sub get_file_owner {
2921         my $path = shift;
2922
2923         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2924         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2925         if (!defined $gcos) {
2926                 return undef;
2927         }
2928         my $owner = $gcos;
2929         $owner =~ s/[,;].*$//;
2930         return to_utf8($owner);
2931 }
2932
2933 # assume that file exists
2934 sub insert_file {
2935         my $filename = shift;
2936
2937         open my $fd, '<', $filename;
2938         print map { to_utf8($_) } <$fd>;
2939         close $fd;
2940 }
2941
2942 ## ......................................................................
2943 ## mimetype related functions
2944
2945 sub mimetype_guess_file {
2946         my $filename = shift;
2947         my $mimemap = shift;
2948         -r $mimemap or return undef;
2949
2950         my %mimemap;
2951         open(my $mh, '<', $mimemap) or return undef;
2952         while (<$mh>) {
2953                 next if m/^#/; # skip comments
2954                 my ($mimetype, $exts) = split(/\t+/);
2955                 if (defined $exts) {
2956                         my @exts = split(/\s+/, $exts);
2957                         foreach my $ext (@exts) {
2958                                 $mimemap{$ext} = $mimetype;
2959                         }
2960                 }
2961         }
2962         close($mh);
2963
2964         $filename =~ /\.([^.]*)$/;
2965         return $mimemap{$1};
2966 }
2967
2968 sub mimetype_guess {
2969         my $filename = shift;
2970         my $mime;
2971         $filename =~ /\./ or return undef;
2972
2973         if ($mimetypes_file) {
2974                 my $file = $mimetypes_file;
2975                 if ($file !~ m!^/!) { # if it is relative path
2976                         # it is relative to project
2977                         $file = "$projectroot/$project/$file";
2978                 }
2979                 $mime = mimetype_guess_file($filename, $file);
2980         }
2981         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2982         return $mime;
2983 }
2984
2985 sub blob_mimetype {
2986         my $fd = shift;
2987         my $filename = shift;
2988
2989         if ($filename) {
2990                 my $mime = mimetype_guess($filename);
2991                 $mime and return $mime;
2992         }
2993
2994         # just in case
2995         return $default_blob_plain_mimetype unless $fd;
2996
2997         if (-T $fd) {
2998                 return 'text/plain';
2999         } elsif (! $filename) {
3000                 return 'application/octet-stream';
3001         } elsif ($filename =~ m/\.png$/i) {
3002                 return 'image/png';
3003         } elsif ($filename =~ m/\.gif$/i) {
3004                 return 'image/gif';
3005         } elsif ($filename =~ m/\.jpe?g$/i) {
3006                 return 'image/jpeg';
3007         } else {
3008                 return 'application/octet-stream';
3009         }
3010 }
3011
3012 sub blob_contenttype {
3013         my ($fd, $file_name, $type) = @_;
3014
3015         $type ||= blob_mimetype($fd, $file_name);
3016         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3017                 $type .= "; charset=$default_text_plain_charset";
3018         }
3019
3020         return $type;
3021 }
3022
3023 ## ======================================================================
3024 ## functions printing HTML: header, footer, error page
3025
3026 sub git_header_html {
3027         my $status = shift || "200 OK";
3028         my $expires = shift;
3029
3030         my $title = "$site_name";
3031         if (defined $project) {
3032                 $title .= " - " . to_utf8($project);
3033                 if (defined $action) {
3034                         $title .= "/$action";
3035                         if (defined $file_name) {
3036                                 $title .= " - " . esc_path($file_name);
3037                                 if ($action eq "tree" && $file_name !~ m|/$|) {
3038                                         $title .= "/";
3039                                 }
3040                         }
3041                 }
3042         }
3043         my $content_type;
3044         # require explicit support from the UA if we are to send the page as
3045         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3046         # we have to do this because MSIE sometimes globs '*/*', pretending to
3047         # support xhtml+xml but choking when it gets what it asked for.
3048         if (defined $cgi->http('HTTP_ACCEPT') &&
3049             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3050             $cgi->Accept('application/xhtml+xml') != 0) {
3051                 $content_type = 'application/xhtml+xml';
3052         } else {
3053                 $content_type = 'text/html';
3054         }
3055         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3056                            -status=> $status, -expires => $expires);
3057         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3058         print <<EOF;
3059 <?xml version="1.0" encoding="utf-8"?>
3060 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3061 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3062 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3063 <!-- git core binaries version $git_version -->
3064 <head>
3065 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3066 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3067 <meta name="robots" content="index, nofollow"/>
3068 <title>$title</title>
3069 EOF
3070         # the stylesheet, favicon etc urls won't work correctly with path_info
3071         # unless we set the appropriate base URL
3072         if ($ENV{'PATH_INFO'}) {
3073                 print "<base href=\"".esc_url($base_url)."\" />\n";
3074         }
3075         # print out each stylesheet that exist, providing backwards capability
3076         # for those people who defined $stylesheet in a config file
3077         if (defined $stylesheet) {
3078                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3079         } else {
3080                 foreach my $stylesheet (@stylesheets) {
3081                         next unless $stylesheet;
3082                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3083                 }
3084         }
3085         if (defined $project) {
3086                 my %href_params = get_feed_info();
3087                 if (!exists $href_params{'-title'}) {
3088                         $href_params{'-title'} = 'log';
3089                 }
3090
3091                 foreach my $format qw(RSS Atom) {
3092                         my $type = lc($format);
3093                         my %link_attr = (
3094                                 '-rel' => 'alternate',
3095                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3096                                 '-type' => "application/$type+xml"
3097                         );
3098
3099                         $href_params{'action'} = $type;
3100                         $link_attr{'-href'} = href(%href_params);
3101                         print "<link ".
3102                               "rel=\"$link_attr{'-rel'}\" ".
3103                               "title=\"$link_attr{'-title'}\" ".
3104                               "href=\"$link_attr{'-href'}\" ".
3105                               "type=\"$link_attr{'-type'}\" ".
3106                               "/>\n";
3107
3108                         $href_params{'extra_options'} = '--no-merges';
3109                         $link_attr{'-href'} = href(%href_params);
3110                         $link_attr{'-title'} .= ' (no merges)';
3111                         print "<link ".
3112                               "rel=\"$link_attr{'-rel'}\" ".
3113                               "title=\"$link_attr{'-title'}\" ".
3114                               "href=\"$link_attr{'-href'}\" ".
3115                               "type=\"$link_attr{'-type'}\" ".
3116                               "/>\n";
3117                 }
3118
3119         } else {
3120                 printf('<link rel="alternate" title="%s projects list" '.
3121                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3122                        $site_name, href(project=>undef, action=>"project_index"));
3123                 printf('<link rel="alternate" title="%s projects feeds" '.
3124                        'href="%s" type="text/x-opml" />'."\n",
3125                        $site_name, href(project=>undef, action=>"opml"));
3126         }
3127         if (defined $favicon) {
3128                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3129         }
3130
3131         print "</head>\n" .
3132               "<body>\n";
3133
3134         if (-f $site_header) {
3135                 insert_file($site_header);
3136         }
3137
3138         print "<div class=\"page_header\">\n" .
3139               $cgi->a({-href => esc_url($logo_url),
3140                        -title => $logo_label},
3141                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3142         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3143         if (defined $project) {
3144                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3145                 if (defined $action) {
3146                         print " / $action";
3147                 }
3148                 print "\n";
3149         }
3150         print "</div>\n";
3151
3152         my $have_search = gitweb_check_feature('search');
3153         if (defined $project && $have_search) {
3154                 if (!defined $searchtext) {
3155                         $searchtext = "";
3156                 }
3157                 my $search_hash;
3158                 if (defined $hash_base) {
3159                         $search_hash = $hash_base;
3160                 } elsif (defined $hash) {
3161                         $search_hash = $hash;
3162                 } else {
3163                         $search_hash = "HEAD";
3164                 }
3165                 my $action = $my_uri;
3166                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3167                 if ($use_pathinfo) {
3168                         $action .= "/".esc_url($project);
3169                 }
3170                 print $cgi->startform(-method => "get", -action => $action) .
3171                       "<div class=\"search\">\n" .
3172                       (!$use_pathinfo &&
3173                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3174                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3175                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3176                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3177                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3178                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3179                       " search:\n",
3180                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3181                       "<span title=\"Extended regular expression\">" .
3182                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3183                                      -checked => $search_use_regexp) .
3184                       "</span>" .
3185                       "</div>" .
3186                       $cgi->end_form() . "\n";
3187         }
3188 }
3189
3190 sub git_footer_html {
3191         my $feed_class = 'rss_logo';
3192
3193         print "<div class=\"page_footer\">\n";
3194         if (defined $project) {
3195                 my $descr = git_get_project_description($project);
3196                 if (defined $descr) {
3197                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3198                 }
3199
3200                 my %href_params = get_feed_info();
3201                 if (!%href_params) {
3202                         $feed_class .= ' generic';
3203                 }
3204                 $href_params{'-title'} ||= 'log';
3205
3206                 foreach my $format qw(RSS Atom) {
3207                         $href_params{'action'} = lc($format);
3208                         print $cgi->a({-href => href(%href_params),
3209                                       -title => "$href_params{'-title'} $format feed",
3210                                       -class => $feed_class}, $format)."\n";
3211                 }
3212
3213         } else {
3214                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3215                               -class => $feed_class}, "OPML") . " ";
3216                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3217                               -class => $feed_class}, "TXT") . "\n";
3218         }
3219         print "</div>\n"; # class="page_footer"
3220
3221         if (-f $site_footer) {
3222                 insert_file($site_footer);
3223         }
3224
3225         print "</body>\n" .
3226               "</html>";
3227 }
3228
3229 # die_error(<http_status_code>, <error_message>)
3230 # Example: die_error(404, 'Hash not found')
3231 # By convention, use the following status codes (as defined in RFC 2616):
3232 # 400: Invalid or missing CGI parameters, or
3233 #      requested object exists but has wrong type.
3234 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3235 #      this server or project.
3236 # 404: Requested object/revision/project doesn't exist.
3237 # 500: The server isn't configured properly, or
3238 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3239 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3240 sub die_error {
3241         my $status = shift || 500;
3242         my $error = shift || "Internal server error";
3243
3244         my %http_responses = (400 => '400 Bad Request',
3245                               403 => '403 Forbidden',
3246                               404 => '404 Not Found',
3247                               500 => '500 Internal Server Error');
3248         git_header_html($http_responses{$status});
3249         print <<EOF;
3250 <div class="page_body">
3251 <br /><br />
3252 $status - $error
3253 <br />
3254 </div>
3255 EOF
3256         git_footer_html();
3257         exit;
3258 }
3259
3260 ## ----------------------------------------------------------------------
3261 ## functions printing or outputting HTML: navigation
3262
3263 sub git_print_page_nav {
3264         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3265         $extra = '' if !defined $extra; # pager or formats
3266
3267         my @navs = qw(summary shortlog log commit commitdiff tree);
3268         if ($suppress) {
3269                 @navs = grep { $_ ne $suppress } @navs;
3270         }
3271
3272         my %arg = map { $_ => {action=>$_} } @navs;
3273         if (defined $head) {
3274                 for (qw(commit commitdiff)) {
3275                         $arg{$_}{'hash'} = $head;
3276                 }
3277                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3278                         for (qw(shortlog log)) {
3279                                 $arg{$_}{'hash'} = $head;
3280                         }
3281                 }
3282         }
3283
3284         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3285         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3286
3287         my @actions = gitweb_get_feature('actions');
3288         my %repl = (
3289                 '%' => '%',
3290                 'n' => $project,         # project name
3291                 'f' => $git_dir,         # project path within filesystem
3292                 'h' => $treehead || '',  # current hash ('h' parameter)
3293                 'b' => $treebase || '',  # hash base ('hb' parameter)
3294         );
3295         while (@actions) {
3296                 my ($label, $link, $pos) = splice(@actions,0,3);
3297                 # insert
3298                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3299                 # munch munch
3300                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3301                 $arg{$label}{'_href'} = $link;
3302         }
3303
3304         print "<div class=\"page_nav\">\n" .
3305                 (join " | ",
3306                  map { $_ eq $current ?
3307                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3308                  } @navs);
3309         print "<br/>\n$extra<br/>\n" .
3310               "</div>\n";
3311 }
3312
3313 sub format_paging_nav {
3314         my ($action, $hash, $head, $page, $has_next_link) = @_;
3315         my $paging_nav;
3316
3317
3318         if ($hash ne $head || $page) {
3319                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3320         } else {
3321                 $paging_nav .= "HEAD";
3322         }
3323
3324         if ($page > 0) {
3325                 $paging_nav .= " &sdot; " .
3326                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3327                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3328         } else {
3329                 $paging_nav .= " &sdot; prev";
3330         }
3331
3332         if ($has_next_link) {
3333                 $paging_nav .= " &sdot; " .
3334                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3335                                  -accesskey => "n", -title => "Alt-n"}, "next");
3336         } else {
3337                 $paging_nav .= " &sdot; next";
3338         }
3339
3340         return $paging_nav;
3341 }
3342
3343 ## ......................................................................
3344 ## functions printing or outputting HTML: div
3345
3346 sub git_print_header_div {
3347         my ($action, $title, $hash, $hash_base) = @_;
3348         my %args = ();
3349
3350         $args{'action'} = $action;
3351         $args{'hash'} = $hash if $hash;
3352         $args{'hash_base'} = $hash_base if $hash_base;
3353
3354         print "<div class=\"header\">\n" .
3355               $cgi->a({-href => href(%args), -class => "title"},
3356               $title ? $title : $action) .
3357               "\n</div>\n";
3358 }
3359
3360 sub print_local_time {
3361         my %date = @_;
3362         if ($date{'hour_local'} < 6) {
3363                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3364                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3365         } else {
3366                 printf(" (%02d:%02d %s)",
3367                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3368         }
3369 }
3370
3371 # Outputs the author name and date in long form
3372 sub git_print_authorship {
3373         my $co = shift;
3374         my %opts = @_;
3375         my $tag = $opts{-tag} || 'div';
3376
3377         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3378         print "<$tag class=\"author_date\">" .
3379               esc_html($co->{'author_name'}) .
3380               " [$ad{'rfc2822'}";
3381         print_local_time(%ad) if ($opts{-localtime});
3382         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3383                   . "</$tag>\n";
3384 }
3385
3386 # Outputs table rows containing the full author or committer information,
3387 # in the format expected for 'commit' view (& similia).
3388 # Parameters are a commit hash reference, followed by the list of people
3389 # to output information for. If the list is empty it defalts to both
3390 # author and committer.
3391 sub git_print_authorship_rows {
3392         my $co = shift;
3393         # too bad we can't use @people = @_ || ('author', 'committer')
3394         my @people = @_;
3395         @people = ('author', 'committer') unless @people;
3396         foreach my $who (@people) {
3397                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3398                 print "<tr><td>$who</td><td>" . esc_html($co->{$who}) . "</td>" .
3399                       "<td rowspan=\"2\">" .
3400                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3401                       "</td></tr>\n" .
3402                       "<tr>" .
3403                       "<td></td><td> $wd{'rfc2822'}";
3404                 print_local_time(%wd);
3405                 print "</td>" .
3406                       "</tr>\n";
3407         }
3408 }
3409
3410 sub git_print_page_path {
3411         my $name = shift;
3412         my $type = shift;
3413         my $hb = shift;
3414
3415
3416         print "<div class=\"page_path\">";
3417         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3418                       -title => 'tree root'}, to_utf8("[$project]"));
3419         print " / ";
3420         if (defined $name) {
3421                 my @dirname = split '/', $name;
3422                 my $basename = pop @dirname;
3423                 my $fullname = '';
3424
3425                 foreach my $dir (@dirname) {
3426                         $fullname .= ($fullname ? '/' : '') . $dir;
3427                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3428                                                      hash_base=>$hb),
3429                                       -title => $fullname}, esc_path($dir));
3430                         print " / ";
3431                 }
3432                 if (defined $type && $type eq 'blob') {
3433                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3434                                                      hash_base=>$hb),
3435                                       -title => $name}, esc_path($basename));
3436                 } elsif (defined $type && $type eq 'tree') {
3437                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3438                                                      hash_base=>$hb),
3439                                       -title => $name}, esc_path($basename));
3440                         print " / ";
3441                 } else {
3442                         print esc_path($basename);
3443                 }
3444         }
3445         print "<br/></div>\n";
3446 }
3447
3448 sub git_print_log {
3449         my $log = shift;
3450         my %opts = @_;
3451
3452         if ($opts{'-remove_title'}) {
3453                 # remove title, i.e. first line of log
3454                 shift @$log;
3455         }
3456         # remove leading empty lines
3457         while (defined $log->[0] && $log->[0] eq "") {
3458                 shift @$log;
3459         }
3460
3461         # print log
3462         my $signoff = 0;
3463         my $empty = 0;
3464         foreach my $line (@$log) {
3465                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3466                         $signoff = 1;
3467                         $empty = 0;
3468                         if (! $opts{'-remove_signoff'}) {
3469                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3470                                 next;
3471                         } else {
3472                                 # remove signoff lines
3473                                 next;
3474                         }
3475                 } else {
3476                         $signoff = 0;
3477                 }
3478
3479                 # print only one empty line
3480                 # do not print empty line after signoff
3481                 if ($line eq "") {
3482                         next if ($empty || $signoff);
3483                         $empty = 1;
3484                 } else {
3485                         $empty = 0;
3486                 }
3487
3488                 print format_log_line_html($line) . "<br/>\n";
3489         }
3490
3491         if ($opts{'-final_empty_line'}) {
3492                 # end with single empty line
3493                 print "<br/>\n" unless $empty;
3494         }
3495 }
3496
3497 # return link target (what link points to)
3498 sub git_get_link_target {
3499         my $hash = shift;
3500         my $link_target;
3501
3502         # read link
3503         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3504                 or return;
3505         {
3506                 local $/ = undef;
3507                 $link_target = <$fd>;
3508         }
3509         close $fd
3510                 or return;
3511
3512         return $link_target;
3513 }
3514
3515 # given link target, and the directory (basedir) the link is in,
3516 # return target of link relative to top directory (top tree);
3517 # return undef if it is not possible (including absolute links).
3518 sub normalize_link_target {
3519         my ($link_target, $basedir) = @_;
3520
3521         # absolute symlinks (beginning with '/') cannot be normalized
3522         return if (substr($link_target, 0, 1) eq '/');
3523
3524         # normalize link target to path from top (root) tree (dir)
3525         my $path;
3526         if ($basedir) {
3527                 $path = $basedir . '/' . $link_target;
3528         } else {
3529                 # we are in top (root) tree (dir)
3530                 $path = $link_target;
3531         }
3532
3533         # remove //, /./, and /../
3534         my @path_parts;
3535         foreach my $part (split('/', $path)) {
3536                 # discard '.' and ''
3537                 next if (!$part || $part eq '.');
3538                 # handle '..'
3539                 if ($part eq '..') {
3540                         if (@path_parts) {
3541                                 pop @path_parts;
3542                         } else {
3543                                 # link leads outside repository (outside top dir)
3544                                 return;
3545                         }
3546                 } else {
3547                         push @path_parts, $part;
3548                 }
3549         }
3550         $path = join('/', @path_parts);
3551
3552         return $path;
3553 }
3554
3555 # print tree entry (row of git_tree), but without encompassing <tr> element
3556 sub git_print_tree_entry {
3557         my ($t, $basedir, $hash_base, $have_blame) = @_;
3558
3559         my %base_key = ();
3560         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3561
3562         # The format of a table row is: mode list link.  Where mode is
3563         # the mode of the entry, list is the name of the entry, an href,
3564         # and link is the action links of the entry.
3565
3566         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3567         if ($t->{'type'} eq "blob") {
3568                 print "<td class=\"list\">" .
3569                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3570                                                file_name=>"$basedir$t->{'name'}", %base_key),
3571                                 -class => "list"}, esc_path($t->{'name'}));
3572                 if (S_ISLNK(oct $t->{'mode'})) {
3573                         my $link_target = git_get_link_target($t->{'hash'});
3574                         if ($link_target) {
3575                                 my $norm_target = normalize_link_target($link_target, $basedir);
3576                                 if (defined $norm_target) {
3577                                         print " -> " .
3578                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3579                                                                      file_name=>$norm_target),
3580                                                        -title => $norm_target}, esc_path($link_target));
3581                                 } else {
3582                                         print " -> " . esc_path($link_target);
3583                                 }
3584                         }
3585                 }
3586                 print "</td>\n";
3587                 print "<td class=\"link\">";
3588                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3589                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3590                               "blob");
3591                 if ($have_blame) {
3592                         print " | " .
3593                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3594                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3595                                       "blame");
3596                 }
3597                 if (defined $hash_base) {
3598                         print " | " .
3599                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3600                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3601                                       "history");
3602                 }
3603                 print " | " .
3604                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3605                                                file_name=>"$basedir$t->{'name'}")},
3606                                 "raw");
3607                 print "</td>\n";
3608
3609         } elsif ($t->{'type'} eq "tree") {
3610                 print "<td class=\"list\">";
3611                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3612                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3613                               esc_path($t->{'name'}));
3614                 print "</td>\n";
3615                 print "<td class=\"link\">";
3616                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3617                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3618                               "tree");
3619                 if (defined $hash_base) {
3620                         print " | " .
3621                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3622                                                      file_name=>"$basedir$t->{'name'}")},
3623                                       "history");
3624                 }
3625                 print "</td>\n";
3626         } else {
3627                 # unknown object: we can only present history for it
3628                 # (this includes 'commit' object, i.e. submodule support)
3629                 print "<td class=\"list\">" .
3630                       esc_path($t->{'name'}) .
3631                       "</td>\n";
3632                 print "<td class=\"link\">";
3633                 if (defined $hash_base) {
3634                         print $cgi->a({-href => href(action=>"history",
3635                                                      hash_base=>$hash_base,
3636                                                      file_name=>"$basedir$t->{'name'}")},
3637                                       "history");
3638                 }
3639                 print "</td>\n";
3640         }
3641 }
3642
3643 ## ......................................................................
3644 ## functions printing large fragments of HTML
3645
3646 # get pre-image filenames for merge (combined) diff
3647 sub fill_from_file_info {
3648         my ($diff, @parents) = @_;
3649
3650         $diff->{'from_file'} = [ ];
3651         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3652         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3653                 if ($diff->{'status'}[$i] eq 'R' ||
3654                     $diff->{'status'}[$i] eq 'C') {
3655                         $diff->{'from_file'}[$i] =
3656                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3657                 }
3658         }
3659
3660         return $diff;
3661 }
3662
3663 # is current raw difftree line of file deletion
3664 sub is_deleted {
3665         my $diffinfo = shift;
3666
3667         return $diffinfo->{'to_id'} eq ('0' x 40);
3668 }
3669
3670 # does patch correspond to [previous] difftree raw line
3671 # $diffinfo  - hashref of parsed raw diff format
3672 # $patchinfo - hashref of parsed patch diff format
3673 #              (the same keys as in $diffinfo)
3674 sub is_patch_split {
3675         my ($diffinfo, $patchinfo) = @_;
3676
3677         return defined $diffinfo && defined $patchinfo
3678                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3679 }
3680
3681
3682 sub git_difftree_body {
3683         my ($difftree, $hash, @parents) = @_;
3684         my ($parent) = $parents[0];
3685         my $have_blame = gitweb_check_feature('blame');
3686         print "<div class=\"list_head\">\n";
3687         if ($#{$difftree} > 10) {
3688                 print(($#{$difftree} + 1) . " files changed:\n");
3689         }
3690         print "</div>\n";
3691
3692         print "<table class=\"" .
3693               (@parents > 1 ? "combined " : "") .
3694               "diff_tree\">\n";
3695
3696         # header only for combined diff in 'commitdiff' view
3697         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3698         if ($has_header) {
3699                 # table header
3700                 print "<thead><tr>\n" .
3701                        "<th></th><th></th>\n"; # filename, patchN link
3702                 for (my $i = 0; $i < @parents; $i++) {
3703                         my $par = $parents[$i];
3704                         print "<th>" .
3705                               $cgi->a({-href => href(action=>"commitdiff",
3706                                                      hash=>$hash, hash_parent=>$par),
3707                                        -title => 'commitdiff to parent number ' .
3708                                                   ($i+1) . ': ' . substr($par,0,7)},
3709                                       $i+1) .
3710                               "&nbsp;</th>\n";
3711                 }
3712                 print "</tr></thead>\n<tbody>\n";
3713         }
3714
3715         my $alternate = 1;
3716         my $patchno = 0;
3717         foreach my $line (@{$difftree}) {
3718                 my $diff = parsed_difftree_line($line);
3719
3720                 if ($alternate) {
3721                         print "<tr class=\"dark\">\n";
3722                 } else {
3723                         print "<tr class=\"light\">\n";
3724                 }
3725                 $alternate ^= 1;
3726
3727                 if (exists $diff->{'nparents'}) { # combined diff
3728
3729                         fill_from_file_info($diff, @parents)
3730                                 unless exists $diff->{'from_file'};
3731
3732                         if (!is_deleted($diff)) {
3733                                 # file exists in the result (child) commit
3734                                 print "<td>" .
3735                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3736                                                              file_name=>$diff->{'to_file'},
3737                                                              hash_base=>$hash),
3738                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3739                                       "</td>\n";
3740                         } else {
3741                                 print "<td>" .
3742                                       esc_path($diff->{'to_file'}) .
3743                                       "</td>\n";
3744                         }
3745
3746                         if ($action eq 'commitdiff') {
3747                                 # link to patch
3748                                 $patchno++;
3749                                 print "<td class=\"link\">" .
3750                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3751                                       " | " .
3752                                       "</td>\n";
3753                         }
3754
3755                         my $has_history = 0;
3756                         my $not_deleted = 0;
3757                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3758                                 my $hash_parent = $parents[$i];
3759                                 my $from_hash = $diff->{'from_id'}[$i];
3760                                 my $from_path = $diff->{'from_file'}[$i];
3761                                 my $status = $diff->{'status'}[$i];
3762
3763                                 $has_history ||= ($status ne 'A');
3764                                 $not_deleted ||= ($status ne 'D');
3765
3766                                 if ($status eq 'A') {
3767                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3768                                 } elsif ($status eq 'D') {
3769                                         print "<td class=\"link\">" .
3770                                               $cgi->a({-href => href(action=>"blob",
3771                                                                      hash_base=>$hash,
3772                                                                      hash=>$from_hash,
3773                                                                      file_name=>$from_path)},
3774                                                       "blob" . ($i+1)) .
3775                                               " | </td>\n";
3776                                 } else {
3777                                         if ($diff->{'to_id'} eq $from_hash) {
3778                                                 print "<td class=\"link nochange\">";
3779                                         } else {
3780                                                 print "<td class=\"link\">";
3781                                         }
3782                                         print $cgi->a({-href => href(action=>"blobdiff",
3783                                                                      hash=>$diff->{'to_id'},
3784                                                                      hash_parent=>$from_hash,
3785                                                                      hash_base=>$hash,
3786                                                                      hash_parent_base=>$hash_parent,
3787                                                                      file_name=>$diff->{'to_file'},
3788                                                                      file_parent=>$from_path)},
3789                                                       "diff" . ($i+1)) .
3790                                               " | </td>\n";
3791                                 }
3792                         }
3793
3794                         print "<td class=\"link\">";
3795                         if ($not_deleted) {
3796                                 print $cgi->a({-href => href(action=>"blob",
3797                                                              hash=>$diff->{'to_id'},
3798                                                              file_name=>$diff->{'to_file'},
3799                                                              hash_base=>$hash)},
3800                                               "blob");
3801                                 print " | " if ($has_history);
3802                         }
3803                         if ($has_history) {
3804                                 print $cgi->a({-href => href(action=>"history",
3805                                                              file_name=>$diff->{'to_file'},
3806                                                              hash_base=>$hash)},
3807                                               "history");
3808                         }
3809                         print "</td>\n";
3810
3811                         print "</tr>\n";
3812                         next; # instead of 'else' clause, to avoid extra indent
3813                 }
3814                 # else ordinary diff
3815
3816                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3817                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3818                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3819                         $to_mode_oct = oct $diff->{'to_mode'};
3820                         if (S_ISREG($to_mode_oct)) { # only for regular file
3821                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3822                         }
3823                         $to_file_type = file_type($diff->{'to_mode'});
3824                 }
3825                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3826                         $from_mode_oct = oct $diff->{'from_mode'};
3827                         if (S_ISREG($to_mode_oct)) { # only for regular file
3828                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3829                         }
3830                         $from_file_type = file_type($diff->{'from_mode'});
3831                 }
3832
3833                 if ($diff->{'status'} eq "A") { # created
3834                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3835                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3836                         $mode_chng   .= "]</span>";
3837                         print "<td>";
3838                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3839                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3840                                       -class => "list"}, esc_path($diff->{'file'}));
3841                         print "</td>\n";
3842                         print "<td>$mode_chng</td>\n";
3843                         print "<td class=\"link\">";
3844                         if ($action eq 'commitdiff') {
3845                                 # link to patch
3846                                 $patchno++;
3847                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3848                                 print " | ";
3849                         }
3850                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3851                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3852                                       "blob");
3853                         print "</td>\n";
3854
3855                 } elsif ($diff->{'status'} eq "D") { # deleted
3856                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3857                         print "<td>";
3858                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3859                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3860                                        -class => "list"}, esc_path($diff->{'file'}));
3861                         print "</td>\n";
3862                         print "<td>$mode_chng</td>\n";
3863                         print "<td class=\"link\">";
3864                         if ($action eq 'commitdiff') {
3865                                 # link to patch
3866                                 $patchno++;
3867                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3868                                 print " | ";
3869                         }
3870                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3871                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3872                                       "blob") . " | ";
3873                         if ($have_blame) {
3874                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3875                                                              file_name=>$diff->{'file'})},
3876                                               "blame") . " | ";
3877                         }
3878                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3879                                                      file_name=>$diff->{'file'})},
3880                                       "history");
3881                         print "</td>\n";
3882
3883                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3884                         my $mode_chnge = "";
3885                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3886                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3887                                 if ($from_file_type ne $to_file_type) {
3888                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3889                                 }
3890                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3891                                         if ($from_mode_str && $to_mode_str) {
3892                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3893                                         } elsif ($to_mode_str) {
3894                                                 $mode_chnge .= " mode: $to_mode_str";
3895                                         }
3896                                 }
3897                                 $mode_chnge .= "]</span>\n";
3898                         }
3899                         print "<td>";
3900                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3901                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3902                                       -class => "list"}, esc_path($diff->{'file'}));
3903                         print "</td>\n";
3904                         print "<td>$mode_chnge</td>\n";
3905                         print "<td class=\"link\">";
3906                         if ($action eq 'commitdiff') {
3907                                 # link to patch
3908                                 $patchno++;
3909                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3910                                       " | ";
3911                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3912                                 # "commit" view and modified file (not onlu mode changed)
3913                                 print $cgi->a({-href => href(action=>"blobdiff",
3914                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3915                                                              hash_base=>$hash, hash_parent_base=>$parent,
3916                                                              file_name=>$diff->{'file'})},
3917                                               "diff") .
3918                                       " | ";
3919                         }
3920                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3921                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3922                                        "blob") . " | ";
3923                         if ($have_blame) {
3924                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3925                                                              file_name=>$diff->{'file'})},
3926                                               "blame") . " | ";
3927                         }
3928                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3929                                                      file_name=>$diff->{'file'})},
3930                                       "history");
3931                         print "</td>\n";
3932
3933                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3934                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3935                         my $nstatus = $status_name{$diff->{'status'}};
3936                         my $mode_chng = "";
3937                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3938                                 # mode also for directories, so we cannot use $to_mode_str
3939                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3940                         }
3941                         print "<td>" .
3942                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3943                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3944                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3945                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3946                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3947                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3948                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3949                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3950                               "<td class=\"link\">";
3951                         if ($action eq 'commitdiff') {
3952                                 # link to patch
3953                                 $patchno++;
3954                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3955                                       " | ";
3956                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3957                                 # "commit" view and modified file (not only pure rename or copy)
3958                                 print $cgi->a({-href => href(action=>"blobdiff",
3959                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3960                                                              hash_base=>$hash, hash_parent_base=>$parent,
3961                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3962                                               "diff") .
3963                                       " | ";
3964                         }
3965                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3966                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3967                                       "blob") . " | ";
3968                         if ($have_blame) {
3969                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3970                                                              file_name=>$diff->{'to_file'})},
3971                                               "blame") . " | ";
3972                         }
3973                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3974                                                     file_name=>$diff->{'to_file'})},
3975                                       "history");
3976                         print "</td>\n";
3977
3978                 } # we should not encounter Unmerged (U) or Unknown (X) status
3979                 print "</tr>\n";
3980         }
3981         print "</tbody>" if $has_header;
3982         print "</table>\n";
3983 }
3984
3985 sub git_patchset_body {
3986         my ($fd, $difftree, $hash, @hash_parents) = @_;
3987         my ($hash_parent) = $hash_parents[0];
3988
3989         my $is_combined = (@hash_parents > 1);
3990         my $patch_idx = 0;
3991         my $patch_number = 0;
3992         my $patch_line;
3993         my $diffinfo;
3994         my $to_name;
3995         my (%from, %to);
3996
3997         print "<div class=\"patchset\">\n";
3998
3999         # skip to first patch
4000         while ($patch_line = <$fd>) {
4001                 chomp $patch_line;
4002
4003                 last if ($patch_line =~ m/^diff /);
4004         }
4005
4006  PATCH:
4007         while ($patch_line) {
4008
4009                 # parse "git diff" header line
4010                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4011                         # $1 is from_name, which we do not use
4012                         $to_name = unquote($2);
4013                         $to_name =~ s!^b/!!;
4014                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4015                         # $1 is 'cc' or 'combined', which we do not use
4016                         $to_name = unquote($2);
4017                 } else {
4018                         $to_name = undef;
4019                 }
4020
4021                 # check if current patch belong to current raw line
4022                 # and parse raw git-diff line if needed
4023                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4024                         # this is continuation of a split patch
4025                         print "<div class=\"patch cont\">\n";
4026                 } else {
4027                         # advance raw git-diff output if needed
4028                         $patch_idx++ if defined $diffinfo;
4029
4030                         # read and prepare patch information
4031                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4032
4033                         # compact combined diff output can have some patches skipped
4034                         # find which patch (using pathname of result) we are at now;
4035                         if ($is_combined) {
4036                                 while ($to_name ne $diffinfo->{'to_file'}) {
4037                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4038                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4039                                               "</div>\n";  # class="patch"
4040
4041                                         $patch_idx++;
4042                                         $patch_number++;
4043
4044                                         last if $patch_idx > $#$difftree;
4045                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4046                                 }
4047                         }
4048
4049                         # modifies %from, %to hashes
4050                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4051
4052                         # this is first patch for raw difftree line with $patch_idx index
4053                         # we index @$difftree array from 0, but number patches from 1
4054                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4055                 }
4056
4057                 # git diff header
4058                 #assert($patch_line =~ m/^diff /) if DEBUG;
4059                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4060                 $patch_number++;
4061                 # print "git diff" header
4062                 print format_git_diff_header_line($patch_line, $diffinfo,
4063                                                   \%from, \%to);
4064
4065                 # print extended diff header
4066                 print "<div class=\"diff extended_header\">\n";
4067         EXTENDED_HEADER:
4068                 while ($patch_line = <$fd>) {
4069                         chomp $patch_line;
4070
4071                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4072
4073                         print format_extended_diff_header_line($patch_line, $diffinfo,
4074                                                                \%from, \%to);
4075                 }
4076                 print "</div>\n"; # class="diff extended_header"
4077
4078                 # from-file/to-file diff header
4079                 if (! $patch_line) {
4080                         print "</div>\n"; # class="patch"
4081                         last PATCH;
4082                 }
4083                 next PATCH if ($patch_line =~ m/^diff /);
4084                 #assert($patch_line =~ m/^---/) if DEBUG;
4085
4086                 my $last_patch_line = $patch_line;
4087                 $patch_line = <$fd>;
4088                 chomp $patch_line;
4089                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4090
4091                 print format_diff_from_to_header($last_patch_line, $patch_line,
4092                                                  $diffinfo, \%from, \%to,
4093                                                  @hash_parents);
4094
4095                 # the patch itself
4096         LINE:
4097                 while ($patch_line = <$fd>) {
4098                         chomp $patch_line;
4099
4100                         next PATCH if ($patch_line =~ m/^diff /);
4101
4102                         print format_diff_line($patch_line, \%from, \%to);
4103                 }
4104
4105         } continue {
4106                 print "</div>\n"; # class="patch"
4107         }
4108
4109         # for compact combined (--cc) format, with chunk and patch simpliciaction
4110         # patchset might be empty, but there might be unprocessed raw lines
4111         for (++$patch_idx if $patch_number > 0;
4112              $patch_idx < @$difftree;
4113              ++$patch_idx) {
4114                 # read and prepare patch information
4115                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4116
4117                 # generate anchor for "patch" links in difftree / whatchanged part
4118                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4119                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4120                       "</div>\n";  # class="patch"
4121
4122                 $patch_number++;
4123         }
4124
4125         if ($patch_number == 0) {
4126                 if (@hash_parents > 1) {
4127                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4128                 } else {
4129                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4130                 }
4131         }
4132
4133         print "</div>\n"; # class="patchset"
4134 }
4135
4136 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4137
4138 # fills project list info (age, description, owner, forks) for each
4139 # project in the list, removing invalid projects from returned list
4140 # NOTE: modifies $projlist, but does not remove entries from it
4141 sub fill_project_list_info {
4142         my ($projlist, $check_forks) = @_;
4143         my @projects;
4144
4145         my $show_ctags = gitweb_check_feature('ctags');
4146  PROJECT:
4147         foreach my $pr (@$projlist) {
4148                 my (@activity) = git_get_last_activity($pr->{'path'});
4149                 unless (@activity) {
4150                         next PROJECT;
4151                 }
4152                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4153                 if (!defined $pr->{'descr'}) {
4154                         my $descr = git_get_project_description($pr->{'path'}) || "";
4155                         $descr = to_utf8($descr);
4156                         $pr->{'descr_long'} = $descr;
4157                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4158                 }
4159                 if (!defined $pr->{'owner'}) {
4160                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4161                 }
4162                 if ($check_forks) {
4163                         my $pname = $pr->{'path'};
4164                         if (($pname =~ s/\.git$//) &&
4165                             ($pname !~ /\/$/) &&
4166                             (-d "$projectroot/$pname")) {
4167                                 $pr->{'forks'} = "-d $projectroot/$pname";
4168                         } else {
4169                                 $pr->{'forks'} = 0;
4170                         }
4171                 }
4172                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4173                 push @projects, $pr;
4174         }
4175
4176         return @projects;
4177 }
4178
4179 # print 'sort by' <th> element, generating 'sort by $name' replay link
4180 # if that order is not selected
4181 sub print_sort_th {
4182         my ($name, $order, $header) = @_;
4183         $header ||= ucfirst($name);
4184
4185         if ($order eq $name) {
4186                 print "<th>$header</th>\n";
4187         } else {
4188                 print "<th>" .
4189                       $cgi->a({-href => href(-replay=>1, order=>$name),
4190                                -class => "header"}, $header) .
4191                       "</th>\n";
4192         }
4193 }
4194
4195 sub git_project_list_body {
4196         # actually uses global variable $project
4197         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4198
4199         my $check_forks = gitweb_check_feature('forks');
4200         my @projects = fill_project_list_info($projlist, $check_forks);
4201
4202         $order ||= $default_projects_order;
4203         $from = 0 unless defined $from;
4204         $to = $#projects if (!defined $to || $#projects < $to);
4205
4206         my %order_info = (
4207                 project => { key => 'path', type => 'str' },
4208                 descr => { key => 'descr_long', type => 'str' },
4209                 owner => { key => 'owner', type => 'str' },
4210                 age => { key => 'age', type => 'num' }
4211         );
4212         my $oi = $order_info{$order};
4213         if ($oi->{'type'} eq 'str') {
4214                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4215         } else {
4216                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4217         }
4218
4219         my $show_ctags = gitweb_check_feature('ctags');
4220         if ($show_ctags) {
4221                 my %ctags;
4222                 foreach my $p (@projects) {
4223                         foreach my $ct (keys %{$p->{'ctags'}}) {
4224                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4225                         }
4226                 }
4227                 my $cloud = git_populate_project_tagcloud(\%ctags);
4228                 print git_show_project_tagcloud($cloud, 64);
4229         }
4230
4231         print "<table class=\"project_list\">\n";
4232         unless ($no_header) {
4233                 print "<tr>\n";
4234                 if ($check_forks) {
4235                         print "<th></th>\n";
4236                 }
4237                 print_sort_th('project', $order, 'Project');
4238                 print_sort_th('descr', $order, 'Description');
4239                 print_sort_th('owner', $order, 'Owner');
4240                 print_sort_th('age', $order, 'Last Change');
4241                 print "<th></th>\n" . # for links
4242                       "</tr>\n";
4243         }
4244         my $alternate = 1;
4245         my $tagfilter = $cgi->param('by_tag');
4246         for (my $i = $from; $i <= $to; $i++) {
4247                 my $pr = $projects[$i];
4248
4249                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4250                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4251                         and not $pr->{'descr_long'} =~ /$searchtext/;
4252                 # Weed out forks or non-matching entries of search
4253                 if ($check_forks) {
4254                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4255                         $forkbase="^$forkbase" if $forkbase;
4256                         next if not $searchtext and not $tagfilter and $show_ctags
4257                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4258                 }
4259
4260                 if ($alternate) {
4261                         print "<tr class=\"dark\">\n";
4262                 } else {
4263                         print "<tr class=\"light\">\n";
4264                 }
4265                 $alternate ^= 1;
4266                 if ($check_forks) {
4267                         print "<td>";
4268                         if ($pr->{'forks'}) {
4269                                 print "<!-- $pr->{'forks'} -->\n";
4270                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4271                         }
4272                         print "</td>\n";
4273                 }
4274                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4275                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4276                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4277                                         -class => "list", -title => $pr->{'descr_long'}},
4278                                         esc_html($pr->{'descr'})) . "</td>\n" .
4279                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4280                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4281                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4282                       "<td class=\"link\">" .
4283                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4284                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4285                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4286                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4287                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4288                       "</td>\n" .
4289                       "</tr>\n";
4290         }
4291         if (defined $extra) {
4292                 print "<tr>\n";
4293                 if ($check_forks) {
4294                         print "<td></td>\n";
4295                 }
4296                 print "<td colspan=\"5\">$extra</td>\n" .
4297                       "</tr>\n";
4298         }
4299         print "</table>\n";
4300 }
4301
4302 sub git_shortlog_body {
4303         # uses global variable $project
4304         my ($commitlist, $from, $to, $refs, $extra) = @_;
4305
4306         $from = 0 unless defined $from;
4307         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4308
4309         print "<table class=\"shortlog\">\n";
4310         my $alternate = 1;
4311         for (my $i = $from; $i <= $to; $i++) {
4312                 my %co = %{$commitlist->[$i]};
4313                 my $commit = $co{'id'};
4314                 my $ref = format_ref_marker($refs, $commit);
4315                 if ($alternate) {
4316                         print "<tr class=\"dark\">\n";
4317                 } else {
4318                         print "<tr class=\"light\">\n";
4319                 }
4320                 $alternate ^= 1;
4321                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4322                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4323                       format_author_html('td', \%co, 10) . "<td>";
4324                 print format_subject_html($co{'title'}, $co{'title_short'},
4325                                           href(action=>"commit", hash=>$commit), $ref);
4326                 print "</td>\n" .
4327                       "<td class=\"link\">" .
4328                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4329                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4330                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4331                 my $snapshot_links = format_snapshot_links($commit);
4332                 if (defined $snapshot_links) {
4333                         print " | " . $snapshot_links;
4334                 }
4335                 print "</td>\n" .
4336                       "</tr>\n";
4337         }
4338         if (defined $extra) {
4339                 print "<tr>\n" .
4340                       "<td colspan=\"4\">$extra</td>\n" .
4341                       "</tr>\n";
4342         }
4343         print "</table>\n";
4344 }
4345
4346 sub git_history_body {
4347         # Warning: assumes constant type (blob or tree) during history
4348         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4349
4350         $from = 0 unless defined $from;
4351         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4352
4353         print "<table class=\"history\">\n";
4354         my $alternate = 1;
4355         for (my $i = $from; $i <= $to; $i++) {
4356                 my %co = %{$commitlist->[$i]};
4357                 if (!%co) {
4358                         next;
4359                 }
4360                 my $commit = $co{'id'};
4361
4362                 my $ref = format_ref_marker($refs, $commit);
4363
4364                 if ($alternate) {
4365                         print "<tr class=\"dark\">\n";
4366                 } else {
4367                         print "<tr class=\"light\">\n";
4368                 }
4369                 $alternate ^= 1;
4370                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4371         # shortlog:   format_author_html('td', \%co, 10)
4372                       format_author_html('td', \%co, 15, 3) . "<td>";
4373                 # originally git_history used chop_str($co{'title'}, 50)
4374                 print format_subject_html($co{'title'}, $co{'title_short'},
4375                                           href(action=>"commit", hash=>$commit), $ref);
4376                 print "</td>\n" .
4377                       "<td class=\"link\">" .
4378                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4379                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4380
4381                 if ($ftype eq 'blob') {
4382                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4383                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4384                         if (defined $blob_current && defined $blob_parent &&
4385                                         $blob_current ne $blob_parent) {
4386                                 print " | " .
4387                                         $cgi->a({-href => href(action=>"blobdiff",
4388                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4389                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4390                                                                file_name=>$file_name)},
4391                                                 "diff to current");
4392                         }
4393                 }
4394                 print "</td>\n" .
4395                       "</tr>\n";
4396         }
4397         if (defined $extra) {
4398                 print "<tr>\n" .
4399                       "<td colspan=\"4\">$extra</td>\n" .
4400                       "</tr>\n";
4401         }
4402         print "</table>\n";
4403 }
4404
4405 sub git_tags_body {
4406         # uses global variable $project
4407         my ($taglist, $from, $to, $extra) = @_;
4408         $from = 0 unless defined $from;
4409         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4410
4411         print "<table class=\"tags\">\n";
4412         my $alternate = 1;
4413         for (my $i = $from; $i <= $to; $i++) {
4414                 my $entry = $taglist->[$i];
4415                 my %tag = %$entry;
4416                 my $comment = $tag{'subject'};
4417                 my $comment_short;
4418                 if (defined $comment) {
4419                         $comment_short = chop_str($comment, 30, 5);
4420                 }
4421                 if ($alternate) {
4422                         print "<tr class=\"dark\">\n";
4423                 } else {
4424                         print "<tr class=\"light\">\n";
4425                 }
4426                 $alternate ^= 1;
4427                 if (defined $tag{'age'}) {
4428                         print "<td><i>$tag{'age'}</i></td>\n";
4429                 } else {
4430                         print "<td></td>\n";
4431                 }
4432                 print "<td>" .
4433                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4434                                -class => "list name"}, esc_html($tag{'name'})) .
4435                       "</td>\n" .
4436                       "<td>";
4437                 if (defined $comment) {
4438                         print format_subject_html($comment, $comment_short,
4439                                                   href(action=>"tag", hash=>$tag{'id'}));
4440                 }
4441                 print "</td>\n" .
4442                       "<td class=\"selflink\">";
4443                 if ($tag{'type'} eq "tag") {
4444                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4445                 } else {
4446                         print "&nbsp;";
4447                 }
4448                 print "</td>\n" .
4449                       "<td class=\"link\">" . " | " .
4450                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4451                 if ($tag{'reftype'} eq "commit") {
4452                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4453                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4454                 } elsif ($tag{'reftype'} eq "blob") {
4455                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4456                 }
4457                 print "</td>\n" .
4458                       "</tr>";
4459         }
4460         if (defined $extra) {
4461                 print "<tr>\n" .
4462                       "<td colspan=\"5\">$extra</td>\n" .
4463                       "</tr>\n";
4464         }
4465         print "</table>\n";
4466 }
4467
4468 sub git_heads_body {
4469         # uses global variable $project
4470         my ($headlist, $head, $from, $to, $extra) = @_;
4471         $from = 0 unless defined $from;
4472         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4473
4474         print "<table class=\"heads\">\n";
4475         my $alternate = 1;
4476         for (my $i = $from; $i <= $to; $i++) {
4477                 my $entry = $headlist->[$i];
4478                 my %ref = %$entry;
4479                 my $curr = $ref{'id'} eq $head;
4480                 if ($alternate) {
4481                         print "<tr class=\"dark\">\n";
4482                 } else {
4483                         print "<tr class=\"light\">\n";
4484                 }
4485                 $alternate ^= 1;
4486                 print "<td><i>$ref{'age'}</i></td>\n" .
4487                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4488                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4489                                -class => "list name"},esc_html($ref{'name'})) .
4490                       "</td>\n" .
4491                       "<td class=\"link\">" .
4492                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4493                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4494                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4495                       "</td>\n" .
4496                       "</tr>";
4497         }
4498         if (defined $extra) {
4499                 print "<tr>\n" .
4500                       "<td colspan=\"3\">$extra</td>\n" .
4501                       "</tr>\n";
4502         }
4503         print "</table>\n";
4504 }
4505
4506 sub git_search_grep_body {
4507         my ($commitlist, $from, $to, $extra) = @_;
4508         $from = 0 unless defined $from;
4509         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4510
4511         print "<table class=\"commit_search\">\n";
4512         my $alternate = 1;
4513         for (my $i = $from; $i <= $to; $i++) {
4514                 my %co = %{$commitlist->[$i]};
4515                 if (!%co) {
4516                         next;
4517                 }
4518                 my $commit = $co{'id'};
4519                 if ($alternate) {
4520                         print "<tr class=\"dark\">\n";
4521                 } else {
4522                         print "<tr class=\"light\">\n";
4523                 }
4524                 $alternate ^= 1;
4525                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4526                       format_author_html('td', \%co, 15, 5) .
4527                       "<td>" .
4528                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4529                                -class => "list subject"},
4530                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4531                 my $comment = $co{'comment'};
4532                 foreach my $line (@$comment) {
4533                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4534                                 my ($lead, $match, $trail) = ($1, $2, $3);
4535                                 $match = chop_str($match, 70, 5, 'center');
4536                                 my $contextlen = int((80 - length($match))/2);
4537                                 $contextlen = 30 if ($contextlen > 30);
4538                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4539                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4540
4541                                 $lead  = esc_html($lead);
4542                                 $match = esc_html($match);
4543                                 $trail = esc_html($trail);
4544
4545                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4546                         }
4547                 }
4548                 print "</td>\n" .
4549                       "<td class=\"link\">" .
4550                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4551                       " | " .
4552                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4553                       " | " .
4554                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4555                 print "</td>\n" .
4556                       "</tr>\n";
4557         }
4558         if (defined $extra) {
4559                 print "<tr>\n" .
4560                       "<td colspan=\"3\">$extra</td>\n" .
4561                       "</tr>\n";
4562         }
4563         print "</table>\n";
4564 }
4565
4566 ## ======================================================================
4567 ## ======================================================================
4568 ## actions
4569
4570 sub git_project_list {
4571         my $order = $input_params{'order'};
4572         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4573                 die_error(400, "Unknown order parameter");
4574         }
4575
4576         my @list = git_get_projects_list();
4577         if (!@list) {
4578                 die_error(404, "No projects found");
4579         }
4580
4581         git_header_html();
4582         if (-f $home_text) {
4583                 print "<div class=\"index_include\">\n";
4584                 insert_file($home_text);
4585                 print "</div>\n";
4586         }
4587         print $cgi->startform(-method => "get") .
4588               "<p class=\"projsearch\">Search:\n" .
4589               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4590               "</p>" .
4591               $cgi->end_form() . "\n";
4592         git_project_list_body(\@list, $order);
4593         git_footer_html();
4594 }
4595
4596 sub git_forks {
4597         my $order = $input_params{'order'};
4598         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4599                 die_error(400, "Unknown order parameter");
4600         }
4601
4602         my @list = git_get_projects_list($project);
4603         if (!@list) {
4604                 die_error(404, "No forks found");
4605         }
4606
4607         git_header_html();
4608         git_print_page_nav('','');
4609         git_print_header_div('summary', "$project forks");
4610         git_project_list_body(\@list, $order);
4611         git_footer_html();
4612 }
4613
4614 sub git_project_index {
4615         my @projects = git_get_projects_list($project);
4616
4617         print $cgi->header(
4618                 -type => 'text/plain',
4619                 -charset => 'utf-8',
4620                 -content_disposition => 'inline; filename="index.aux"');
4621
4622         foreach my $pr (@projects) {
4623                 if (!exists $pr->{'owner'}) {
4624                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4625                 }
4626
4627                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4628                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4629                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4630                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4631                 $path  =~ s/ /\+/g;
4632                 $owner =~ s/ /\+/g;
4633
4634                 print "$path $owner\n";
4635         }
4636 }
4637
4638 sub git_summary {
4639         my $descr = git_get_project_description($project) || "none";
4640         my %co = parse_commit("HEAD");
4641         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4642         my $head = $co{'id'};
4643
4644         my $owner = git_get_project_owner($project);
4645
4646         my $refs = git_get_references();
4647         # These get_*_list functions return one more to allow us to see if
4648         # there are more ...
4649         my @taglist  = git_get_tags_list(16);
4650         my @headlist = git_get_heads_list(16);
4651         my @forklist;
4652         my $check_forks = gitweb_check_feature('forks');
4653
4654         if ($check_forks) {
4655                 @forklist = git_get_projects_list($project);
4656         }
4657
4658         git_header_html();
4659         git_print_page_nav('summary','', $head);
4660
4661         print "<div class=\"title\">&nbsp;</div>\n";
4662         print "<table class=\"projects_list\">\n" .
4663               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4664               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4665         if (defined $cd{'rfc2822'}) {
4666                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4667         }
4668
4669         # use per project git URL list in $projectroot/$project/cloneurl
4670         # or make project git URL from git base URL and project name
4671         my $url_tag = "URL";
4672         my @url_list = git_get_project_url_list($project);
4673         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4674         foreach my $git_url (@url_list) {
4675                 next unless $git_url;
4676                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4677                 $url_tag = "";
4678         }
4679
4680         # Tag cloud
4681         my $show_ctags = gitweb_check_feature('ctags');
4682         if ($show_ctags) {
4683                 my $ctags = git_get_project_ctags($project);
4684                 my $cloud = git_populate_project_tagcloud($ctags);
4685                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4686                 print "</td>\n<td>" unless %$ctags;
4687                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4688                 print "</td>\n<td>" if %$ctags;
4689                 print git_show_project_tagcloud($cloud, 48);
4690                 print "</td></tr>";
4691         }
4692
4693         print "</table>\n";
4694
4695         # If XSS prevention is on, we don't include README.html.
4696         # TODO: Allow a readme in some safe format.
4697         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4698                 print "<div class=\"title\">readme</div>\n" .
4699                       "<div class=\"readme\">\n";
4700                 insert_file("$projectroot/$project/README.html");
4701                 print "\n</div>\n"; # class="readme"
4702         }
4703
4704         # we need to request one more than 16 (0..15) to check if
4705         # those 16 are all
4706         my @commitlist = $head ? parse_commits($head, 17) : ();
4707         if (@commitlist) {
4708                 git_print_header_div('shortlog');
4709                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4710                                   $#commitlist <=  15 ? undef :
4711                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4712         }
4713
4714         if (@taglist) {
4715                 git_print_header_div('tags');
4716                 git_tags_body(\@taglist, 0, 15,
4717                               $#taglist <=  15 ? undef :
4718                               $cgi->a({-href => href(action=>"tags")}, "..."));
4719         }
4720
4721         if (@headlist) {
4722                 git_print_header_div('heads');
4723                 git_heads_body(\@headlist, $head, 0, 15,
4724                                $#headlist <= 15 ? undef :
4725                                $cgi->a({-href => href(action=>"heads")}, "..."));
4726         }
4727
4728         if (@forklist) {
4729                 git_print_header_div('forks');
4730                 git_project_list_body(\@forklist, 'age', 0, 15,
4731                                       $#forklist <= 15 ? undef :
4732                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4733                                       'no_header');
4734         }
4735
4736         git_footer_html();
4737 }
4738
4739 sub git_tag {
4740         my $head = git_get_head_hash($project);
4741         git_header_html();
4742         git_print_page_nav('','', $head,undef,$head);
4743         my %tag = parse_tag($hash);
4744
4745         if (! %tag) {
4746                 die_error(404, "Unknown tag object");
4747         }
4748
4749         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4750         print "<div class=\"title_text\">\n" .
4751               "<table class=\"object_header\">\n" .
4752               "<tr>\n" .
4753               "<td>object</td>\n" .
4754               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4755                                $tag{'object'}) . "</td>\n" .
4756               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4757                                               $tag{'type'}) . "</td>\n" .
4758               "</tr>\n";
4759         if (defined($tag{'author'})) {
4760                 git_print_authorship_rows(\%tag, 'author');
4761         }
4762         print "</table>\n\n" .
4763               "</div>\n";
4764         print "<div class=\"page_body\">";
4765         my $comment = $tag{'comment'};
4766         foreach my $line (@$comment) {
4767                 chomp $line;
4768                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4769         }
4770         print "</div>\n";
4771         git_footer_html();
4772 }
4773
4774 sub git_blame {
4775         # permissions
4776         gitweb_check_feature('blame')
4777                 or die_error(403, "Blame view not allowed");
4778
4779         # error checking
4780         die_error(400, "No file name given") unless $file_name;
4781         $hash_base ||= git_get_head_hash($project);
4782         die_error(404, "Couldn't find base commit") unless $hash_base;
4783         my %co = parse_commit($hash_base)
4784                 or die_error(404, "Commit not found");
4785         my $ftype = "blob";
4786         if (!defined $hash) {
4787                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4788                         or die_error(404, "Error looking up file");
4789         } else {
4790                 $ftype = git_get_type($hash);
4791                 if ($ftype !~ "blob") {
4792                         die_error(400, "Object is not a blob");
4793                 }
4794         }
4795
4796         # run git-blame --porcelain
4797         open my $fd, "-|", git_cmd(), "blame", '-p',
4798                 $hash_base, '--', $file_name
4799                 or die_error(500, "Open git-blame failed");
4800
4801         # page header
4802         git_header_html();
4803         my $formats_nav =
4804                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4805                         "blob") .
4806                 " | " .
4807                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4808                         "history") .
4809                 " | " .
4810                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4811                         "HEAD");
4812         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4813         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4814         git_print_page_path($file_name, $ftype, $hash_base);
4815
4816         # page body
4817         my @rev_color = qw(light dark);
4818         my $num_colors = scalar(@rev_color);
4819         my $current_color = 0;
4820         my %metainfo = ();
4821
4822         print <<HTML;
4823 <div class="page_body">
4824 <table class="blame">
4825 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4826 HTML
4827  LINE:
4828         while (my $line = <$fd>) {
4829                 chomp $line;
4830                 # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
4831                 # no <lines in group> for subsequent lines in group of lines
4832                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4833                    ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
4834                 if (!exists $metainfo{$full_rev}) {
4835                         $metainfo{$full_rev} = { 'nprevious' => 0 };
4836                 }
4837                 my $meta = $metainfo{$full_rev};
4838                 my $data;
4839                 while ($data = <$fd>) {
4840                         chomp $data;
4841                         last if ($data =~ s/^\t//); # contents of line
4842                         if ($data =~ /^(\S+)(?: (.*))?$/) {
4843                                 $meta->{$1} = $2 unless exists $meta->{$1};
4844                         }
4845                         if ($data =~ /^previous /) {
4846                                 $meta->{'nprevious'}++;
4847                         }
4848                 }
4849                 my $short_rev = substr($full_rev, 0, 8);
4850                 my $author = $meta->{'author'};
4851                 my %date =
4852                         parse_date($meta->{'author-time'}, $meta->{'author-tz'});
4853                 my $date = $date{'iso-tz'};
4854                 if ($group_size) {
4855                         $current_color = ($current_color + 1) % $num_colors;
4856                 }
4857                 my $tr_class = $rev_color[$current_color];
4858                 $tr_class .= ' boundary' if (exists $meta->{'boundary'});
4859                 $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
4860                 $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
4861                 print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
4862                 if ($group_size) {
4863                         print "<td class=\"sha1\"";
4864                         print " title=\"". esc_html($author) . ", $date\"";
4865                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4866                         print ">";
4867                         print $cgi->a({-href => href(action=>"commit",
4868                                                      hash=>$full_rev,
4869                                                      file_name=>$file_name)},
4870                                       esc_html($short_rev));
4871                         if ($group_size >= 2) {
4872                                 my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
4873                                 if (@author_initials) {
4874                                         print "<br />" .
4875                                               esc_html(join('', @author_initials));
4876                                         #           or join('.', ...)
4877                                 }
4878                         }
4879                         print "</td>\n";
4880                 }
4881                 # 'previous' <sha1 of parent commit> <filename at commit>
4882                 if (exists $meta->{'previous'} &&
4883                     $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
4884                         $meta->{'parent'} = $1;
4885                         $meta->{'file_parent'} = unquote($2);
4886                 }
4887                 my $linenr_commit =
4888                         exists($meta->{'parent'}) ?
4889                         $meta->{'parent'} : $full_rev;
4890                 my $linenr_filename =
4891                         exists($meta->{'file_parent'}) ?
4892                         $meta->{'file_parent'} : unquote($meta->{'filename'});
4893                 my $blamed = href(action => 'blame',
4894                                   file_name => $linenr_filename,
4895                                   hash_base => $linenr_commit);
4896                 print "<td class=\"linenr\">";
4897                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4898                                 -class => "linenr" },
4899                               esc_html($lineno));
4900                 print "</td>";
4901                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4902                 print "</tr>\n";
4903         }
4904         print "</table>\n";
4905         print "</div>";
4906         close $fd
4907                 or print "Reading blob failed\n";
4908
4909         # page footer
4910         git_footer_html();
4911 }
4912
4913 sub git_tags {
4914         my $head = git_get_head_hash($project);
4915         git_header_html();
4916         git_print_page_nav('','', $head,undef,$head);
4917         git_print_header_div('summary', $project);
4918
4919         my @tagslist = git_get_tags_list();
4920         if (@tagslist) {
4921                 git_tags_body(\@tagslist);
4922         }
4923         git_footer_html();
4924 }
4925
4926 sub git_heads {
4927         my $head = git_get_head_hash($project);
4928         git_header_html();
4929         git_print_page_nav('','', $head,undef,$head);
4930         git_print_header_div('summary', $project);
4931
4932         my @headslist = git_get_heads_list();
4933         if (@headslist) {
4934                 git_heads_body(\@headslist, $head);
4935         }
4936         git_footer_html();
4937 }
4938
4939 sub git_blob_plain {
4940         my $type = shift;
4941         my $expires;
4942
4943         if (!defined $hash) {
4944                 if (defined $file_name) {
4945                         my $base = $hash_base || git_get_head_hash($project);
4946                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4947                                 or die_error(404, "Cannot find file");
4948                 } else {
4949                         die_error(400, "No file name defined");
4950                 }
4951         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4952                 # blobs defined by non-textual hash id's can be cached
4953                 $expires = "+1d";
4954         }
4955
4956         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4957                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4958
4959         # content-type (can include charset)
4960         $type = blob_contenttype($fd, $file_name, $type);
4961
4962         # "save as" filename, even when no $file_name is given
4963         my $save_as = "$hash";
4964         if (defined $file_name) {
4965                 $save_as = $file_name;
4966         } elsif ($type =~ m/^text\//) {
4967                 $save_as .= '.txt';
4968         }
4969
4970         # With XSS prevention on, blobs of all types except a few known safe
4971         # ones are served with "Content-Disposition: attachment" to make sure
4972         # they don't run in our security domain.  For certain image types,
4973         # blob view writes an <img> tag referring to blob_plain view, and we
4974         # want to be sure not to break that by serving the image as an
4975         # attachment (though Firefox 3 doesn't seem to care).
4976         my $sandbox = $prevent_xss &&
4977                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
4978
4979         print $cgi->header(
4980                 -type => $type,
4981                 -expires => $expires,
4982                 -content_disposition =>
4983                         ($sandbox ? 'attachment' : 'inline')
4984                         . '; filename="' . $save_as . '"');
4985         local $/ = undef;
4986         binmode STDOUT, ':raw';
4987         print <$fd>;
4988         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4989         close $fd;
4990 }
4991
4992 sub git_blob {
4993         my $expires;
4994
4995         if (!defined $hash) {
4996                 if (defined $file_name) {
4997                         my $base = $hash_base || git_get_head_hash($project);
4998                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4999                                 or die_error(404, "Cannot find file");
5000                 } else {
5001                         die_error(400, "No file name defined");
5002                 }
5003         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5004                 # blobs defined by non-textual hash id's can be cached
5005                 $expires = "+1d";
5006         }
5007
5008         my $have_blame = gitweb_check_feature('blame');
5009         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5010                 or die_error(500, "Couldn't cat $file_name, $hash");
5011         my $mimetype = blob_mimetype($fd, $file_name);
5012         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5013                 close $fd;
5014                 return git_blob_plain($mimetype);
5015         }
5016         # we can have blame only for text/* mimetype
5017         $have_blame &&= ($mimetype =~ m!^text/!);
5018
5019         git_header_html(undef, $expires);
5020         my $formats_nav = '';
5021         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5022                 if (defined $file_name) {
5023                         if ($have_blame) {
5024                                 $formats_nav .=
5025                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5026                                                 "blame") .
5027                                         " | ";
5028                         }
5029                         $formats_nav .=
5030                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5031                                         "history") .
5032                                 " | " .
5033                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5034                                         "raw") .
5035                                 " | " .
5036                                 $cgi->a({-href => href(action=>"blob",
5037                                                        hash_base=>"HEAD", file_name=>$file_name)},
5038                                         "HEAD");
5039                 } else {
5040                         $formats_nav .=
5041                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5042                                         "raw");
5043                 }
5044                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5045                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5046         } else {
5047                 print "<div class=\"page_nav\">\n" .
5048                       "<br/><br/></div>\n" .
5049                       "<div class=\"title\">$hash</div>\n";
5050         }
5051         git_print_page_path($file_name, "blob", $hash_base);
5052         print "<div class=\"page_body\">\n";
5053         if ($mimetype =~ m!^image/!) {
5054                 print qq!<img type="$mimetype"!;
5055                 if ($file_name) {
5056                         print qq! alt="$file_name" title="$file_name"!;
5057                 }
5058                 print qq! src="! .
5059                       href(action=>"blob_plain", hash=>$hash,
5060                            hash_base=>$hash_base, file_name=>$file_name) .
5061                       qq!" />\n!;
5062         } else {
5063                 my $nr;
5064                 while (my $line = <$fd>) {
5065                         chomp $line;
5066                         $nr++;
5067                         $line = untabify($line);
5068                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
5069                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
5070                 }
5071         }
5072         close $fd
5073                 or print "Reading blob failed.\n";
5074         print "</div>";
5075         git_footer_html();
5076 }
5077
5078 sub git_tree {
5079         if (!defined $hash_base) {
5080                 $hash_base = "HEAD";
5081         }
5082         if (!defined $hash) {
5083                 if (defined $file_name) {
5084                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5085                 } else {
5086                         $hash = $hash_base;
5087                 }
5088         }
5089         die_error(404, "No such tree") unless defined($hash);
5090
5091         my @entries = ();
5092         {
5093                 local $/ = "\0";
5094                 open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
5095                         or die_error(500, "Open git-ls-tree failed");
5096                 @entries = map { chomp; $_ } <$fd>;
5097                 close $fd
5098                         or die_error(404, "Reading tree failed");
5099         }
5100
5101         my $refs = git_get_references();
5102         my $ref = format_ref_marker($refs, $hash_base);
5103         git_header_html();
5104         my $basedir = '';
5105         my $have_blame = gitweb_check_feature('blame');
5106         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5107                 my @views_nav = ();
5108                 if (defined $file_name) {
5109                         push @views_nav,
5110                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5111                                         "history"),
5112                                 $cgi->a({-href => href(action=>"tree",
5113                                                        hash_base=>"HEAD", file_name=>$file_name)},
5114                                         "HEAD"),
5115                 }
5116                 my $snapshot_links = format_snapshot_links($hash);
5117                 if (defined $snapshot_links) {
5118                         # FIXME: Should be available when we have no hash base as well.
5119                         push @views_nav, $snapshot_links;
5120                 }
5121                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
5122                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5123         } else {
5124                 undef $hash_base;
5125                 print "<div class=\"page_nav\">\n";
5126                 print "<br/><br/></div>\n";
5127                 print "<div class=\"title\">$hash</div>\n";
5128         }
5129         if (defined $file_name) {
5130                 $basedir = $file_name;
5131                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5132                         $basedir .= '/';
5133                 }
5134                 git_print_page_path($file_name, 'tree', $hash_base);
5135         }
5136         print "<div class=\"page_body\">\n";
5137         print "<table class=\"tree\">\n";
5138         my $alternate = 1;
5139         # '..' (top directory) link if possible
5140         if (defined $hash_base &&
5141             defined $file_name && $file_name =~ m![^/]+$!) {
5142                 if ($alternate) {
5143                         print "<tr class=\"dark\">\n";
5144                 } else {
5145                         print "<tr class=\"light\">\n";
5146                 }
5147                 $alternate ^= 1;
5148
5149                 my $up = $file_name;
5150                 $up =~ s!/?[^/]+$!!;
5151                 undef $up unless $up;
5152                 # based on git_print_tree_entry
5153                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5154                 print '<td class="list">';
5155                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
5156                                              file_name=>$up)},
5157                               "..");
5158                 print "</td>\n";
5159                 print "<td class=\"link\"></td>\n";
5160
5161                 print "</tr>\n";
5162         }
5163         foreach my $line (@entries) {
5164                 my %t = parse_ls_tree_line($line, -z => 1);
5165
5166                 if ($alternate) {
5167                         print "<tr class=\"dark\">\n";
5168                 } else {
5169                         print "<tr class=\"light\">\n";
5170                 }
5171                 $alternate ^= 1;
5172
5173                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5174
5175                 print "</tr>\n";
5176         }
5177         print "</table>\n" .
5178               "</div>";
5179         git_footer_html();
5180 }
5181
5182 sub git_snapshot {
5183         my $format = $input_params{'snapshot_format'};
5184         if (!@snapshot_fmts) {
5185                 die_error(403, "Snapshots not allowed");
5186         }
5187         # default to first supported snapshot format
5188         $format ||= $snapshot_fmts[0];
5189         if ($format !~ m/^[a-z0-9]+$/) {
5190                 die_error(400, "Invalid snapshot format parameter");
5191         } elsif (!exists($known_snapshot_formats{$format})) {
5192                 die_error(400, "Unknown snapshot format");
5193         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5194                 die_error(403, "Snapshot format not allowed");
5195         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5196                 die_error(403, "Unsupported snapshot format");
5197         }
5198
5199         my $type = git_get_type("$hash^{}");
5200         if (!$type) {
5201                 die_error(404, 'Object does not exist');
5202         }  elsif ($type eq 'blob') {
5203                 die_error(400, 'Object is not a tree-ish');
5204         }
5205
5206         my $name = $project;
5207         $name =~ s,([^/])/*\.git$,$1,;
5208         $name = basename($name);
5209         my $filename = to_utf8($name);
5210         $name =~ s/\047/\047\\\047\047/g;
5211         my $cmd;
5212         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
5213         $cmd = quote_command(
5214                 git_cmd(), 'archive',
5215                 "--format=$known_snapshot_formats{$format}{'format'}",
5216                 "--prefix=$name/", $hash);
5217         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5218                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5219         }
5220
5221         print $cgi->header(
5222                 -type => $known_snapshot_formats{$format}{'type'},
5223                 -content_disposition => 'inline; filename="' . "$filename" . '"',
5224                 -status => '200 OK');
5225
5226         open my $fd, "-|", $cmd
5227                 or die_error(500, "Execute git-archive failed");
5228         binmode STDOUT, ':raw';
5229         print <$fd>;
5230         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5231         close $fd;
5232 }
5233
5234 sub git_log {
5235         my $head = git_get_head_hash($project);
5236         if (!defined $hash) {
5237                 $hash = $head;
5238         }
5239         if (!defined $page) {
5240                 $page = 0;
5241         }
5242         my $refs = git_get_references();
5243
5244         my @commitlist = parse_commits($hash, 101, (100 * $page));
5245
5246         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
5247
5248         my ($patch_max) = gitweb_get_feature('patches');
5249         if ($patch_max) {
5250                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5251                         $paging_nav .= " &sdot; " .
5252                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5253                                         "patches");
5254                 }
5255         }
5256
5257         git_header_html();
5258         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5259
5260         if (!@commitlist) {
5261                 my %co = parse_commit($hash);
5262
5263                 git_print_header_div('summary', $project);
5264                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5265         }
5266         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5267         for (my $i = 0; $i <= $to; $i++) {
5268                 my %co = %{$commitlist[$i]};
5269                 next if !%co;
5270                 my $commit = $co{'id'};
5271                 my $ref = format_ref_marker($refs, $commit);
5272                 my %ad = parse_date($co{'author_epoch'});
5273                 git_print_header_div('commit',
5274                                "<span class=\"age\">$co{'age_string'}</span>" .
5275                                esc_html($co{'title'}) . $ref,
5276                                $commit);
5277                 print "<div class=\"title_text\">\n" .
5278                       "<div class=\"log_link\">\n" .
5279                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5280                       " | " .
5281                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5282                       " | " .
5283                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5284                       "<br/>\n" .
5285                       "</div>\n";
5286                       git_print_authorship(\%co, -tag => 'span');
5287                       print "<br/>\n</div>\n";
5288
5289                 print "<div class=\"log_body\">\n";
5290                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5291                 print "</div>\n";
5292         }
5293         if ($#commitlist >= 100) {
5294                 print "<div class=\"page_nav\">\n";
5295                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5296                                -accesskey => "n", -title => "Alt-n"}, "next");
5297                 print "</div>\n";
5298         }
5299         git_footer_html();
5300 }
5301
5302 sub git_commit {
5303         $hash ||= $hash_base || "HEAD";
5304         my %co = parse_commit($hash)
5305             or die_error(404, "Unknown commit object");
5306
5307         my $parent  = $co{'parent'};
5308         my $parents = $co{'parents'}; # listref
5309
5310         # we need to prepare $formats_nav before any parameter munging
5311         my $formats_nav;
5312         if (!defined $parent) {
5313                 # --root commitdiff
5314                 $formats_nav .= '(initial)';
5315         } elsif (@$parents == 1) {
5316                 # single parent commit
5317                 $formats_nav .=
5318                         '(parent: ' .
5319                         $cgi->a({-href => href(action=>"commit",
5320                                                hash=>$parent)},
5321                                 esc_html(substr($parent, 0, 7))) .
5322                         ')';
5323         } else {
5324                 # merge commit
5325                 $formats_nav .=
5326                         '(merge: ' .
5327                         join(' ', map {
5328                                 $cgi->a({-href => href(action=>"commit",
5329                                                        hash=>$_)},
5330                                         esc_html(substr($_, 0, 7)));
5331                         } @$parents ) .
5332                         ')';
5333         }
5334         if (gitweb_check_feature('patches')) {
5335                 $formats_nav .= " | " .
5336                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5337                                 "patch");
5338         }
5339
5340         if (!defined $parent) {
5341                 $parent = "--root";
5342         }
5343         my @difftree;
5344         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5345                 @diff_opts,
5346                 (@$parents <= 1 ? $parent : '-c'),
5347                 $hash, "--"
5348                 or die_error(500, "Open git-diff-tree failed");
5349         @difftree = map { chomp; $_ } <$fd>;
5350         close $fd or die_error(404, "Reading git-diff-tree failed");
5351
5352         # non-textual hash id's can be cached
5353         my $expires;
5354         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5355                 $expires = "+1d";
5356         }
5357         my $refs = git_get_references();
5358         my $ref = format_ref_marker($refs, $co{'id'});
5359
5360         git_header_html(undef, $expires);
5361         git_print_page_nav('commit', '',
5362                            $hash, $co{'tree'}, $hash,
5363                            $formats_nav);
5364
5365         if (defined $co{'parent'}) {
5366                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5367         } else {
5368                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5369         }
5370         print "<div class=\"title_text\">\n" .
5371               "<table class=\"object_header\">\n";
5372         git_print_authorship_rows(\%co);
5373         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5374         print "<tr>" .
5375               "<td>tree</td>" .
5376               "<td class=\"sha1\">" .
5377               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5378                        class => "list"}, $co{'tree'}) .
5379               "</td>" .
5380               "<td class=\"link\">" .
5381               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5382                       "tree");
5383         my $snapshot_links = format_snapshot_links($hash);
5384         if (defined $snapshot_links) {
5385                 print " | " . $snapshot_links;
5386         }
5387         print "</td>" .
5388               "</tr>\n";
5389
5390         foreach my $par (@$parents) {
5391                 print "<tr>" .
5392                       "<td>parent</td>" .
5393                       "<td class=\"sha1\">" .
5394                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5395                                class => "list"}, $par) .
5396                       "</td>" .
5397                       "<td class=\"link\">" .
5398                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5399                       " | " .
5400                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5401                       "</td>" .
5402                       "</tr>\n";
5403         }
5404         print "</table>".
5405               "</div>\n";
5406
5407         print "<div class=\"page_body\">\n";
5408         git_print_log($co{'comment'});
5409         print "</div>\n";
5410
5411         git_difftree_body(\@difftree, $hash, @$parents);
5412
5413         git_footer_html();
5414 }
5415
5416 sub git_object {
5417         # object is defined by:
5418         # - hash or hash_base alone
5419         # - hash_base and file_name
5420         my $type;
5421
5422         # - hash or hash_base alone
5423         if ($hash || ($hash_base && !defined $file_name)) {
5424                 my $object_id = $hash || $hash_base;
5425
5426                 open my $fd, "-|", quote_command(
5427                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5428                         or die_error(404, "Object does not exist");
5429                 $type = <$fd>;
5430                 chomp $type;
5431                 close $fd
5432                         or die_error(404, "Object does not exist");
5433
5434         # - hash_base and file_name
5435         } elsif ($hash_base && defined $file_name) {
5436                 $file_name =~ s,/+$,,;
5437
5438                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5439                         or die_error(404, "Base object does not exist");
5440
5441                 # here errors should not hapen
5442                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5443                         or die_error(500, "Open git-ls-tree failed");
5444                 my $line = <$fd>;
5445                 close $fd;
5446
5447                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5448                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5449                         die_error(404, "File or directory for given base does not exist");
5450                 }
5451                 $type = $2;
5452                 $hash = $3;
5453         } else {
5454                 die_error(400, "Not enough information to find object");
5455         }
5456
5457         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5458                                           hash=>$hash, hash_base=>$hash_base,
5459                                           file_name=>$file_name),
5460                              -status => '302 Found');
5461 }
5462
5463 sub git_blobdiff {
5464         my $format = shift || 'html';
5465
5466         my $fd;
5467         my @difftree;
5468         my %diffinfo;
5469         my $expires;
5470
5471         # preparing $fd and %diffinfo for git_patchset_body
5472         # new style URI
5473         if (defined $hash_base && defined $hash_parent_base) {
5474                 if (defined $file_name) {
5475                         # read raw output
5476                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5477                                 $hash_parent_base, $hash_base,
5478                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5479                                 or die_error(500, "Open git-diff-tree failed");
5480                         @difftree = map { chomp; $_ } <$fd>;
5481                         close $fd
5482                                 or die_error(404, "Reading git-diff-tree failed");
5483                         @difftree
5484                                 or die_error(404, "Blob diff not found");
5485
5486                 } elsif (defined $hash &&
5487                          $hash =~ /[0-9a-fA-F]{40}/) {
5488                         # try to find filename from $hash
5489
5490                         # read filtered raw output
5491                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5492                                 $hash_parent_base, $hash_base, "--"
5493                                 or die_error(500, "Open git-diff-tree failed");
5494                         @difftree =
5495                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5496                                 # $hash == to_id
5497                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5498                                 map { chomp; $_ } <$fd>;
5499                         close $fd
5500                                 or die_error(404, "Reading git-diff-tree failed");
5501                         @difftree
5502                                 or die_error(404, "Blob diff not found");
5503
5504                 } else {
5505                         die_error(400, "Missing one of the blob diff parameters");
5506                 }
5507
5508                 if (@difftree > 1) {
5509                         die_error(400, "Ambiguous blob diff specification");
5510                 }
5511
5512                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5513                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5514                 $file_name   ||= $diffinfo{'to_file'};
5515
5516                 $hash_parent ||= $diffinfo{'from_id'};
5517                 $hash        ||= $diffinfo{'to_id'};
5518
5519                 # non-textual hash id's can be cached
5520                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5521                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5522                         $expires = '+1d';
5523                 }
5524
5525                 # open patch output
5526                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5527                         '-p', ($format eq 'html' ? "--full-index" : ()),
5528                         $hash_parent_base, $hash_base,
5529                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5530                         or die_error(500, "Open git-diff-tree failed");
5531         }
5532
5533         # old/legacy style URI -- not generated anymore since 1.4.3.
5534         if (!%diffinfo) {
5535                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5536         }
5537
5538         # header
5539         if ($format eq 'html') {
5540                 my $formats_nav =
5541                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5542                                 "raw");
5543                 git_header_html(undef, $expires);
5544                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5545                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5546                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5547                 } else {
5548                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5549                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5550                 }
5551                 if (defined $file_name) {
5552                         git_print_page_path($file_name, "blob", $hash_base);
5553                 } else {
5554                         print "<div class=\"page_path\"></div>\n";
5555                 }
5556
5557         } elsif ($format eq 'plain') {
5558                 print $cgi->header(
5559                         -type => 'text/plain',
5560                         -charset => 'utf-8',
5561                         -expires => $expires,
5562                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5563
5564                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5565
5566         } else {
5567                 die_error(400, "Unknown blobdiff format");
5568         }
5569
5570         # patch
5571         if ($format eq 'html') {
5572                 print "<div class=\"page_body\">\n";
5573
5574                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5575                 close $fd;
5576
5577                 print "</div>\n"; # class="page_body"
5578                 git_footer_html();
5579
5580         } else {
5581                 while (my $line = <$fd>) {
5582                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5583                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5584
5585                         print $line;
5586
5587                         last if $line =~ m!^\+\+\+!;
5588                 }
5589                 local $/ = undef;
5590                 print <$fd>;
5591                 close $fd;
5592         }
5593 }
5594
5595 sub git_blobdiff_plain {
5596         git_blobdiff('plain');
5597 }
5598
5599 sub git_commitdiff {
5600         my %params = @_;
5601         my $format = $params{-format} || 'html';
5602
5603         my ($patch_max) = gitweb_get_feature('patches');
5604         if ($format eq 'patch') {
5605                 die_error(403, "Patch view not allowed") unless $patch_max;
5606         }
5607
5608         $hash ||= $hash_base || "HEAD";
5609         my %co = parse_commit($hash)
5610             or die_error(404, "Unknown commit object");
5611
5612         # choose format for commitdiff for merge
5613         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5614                 $hash_parent = '--cc';
5615         }
5616         # we need to prepare $formats_nav before almost any parameter munging
5617         my $formats_nav;
5618         if ($format eq 'html') {
5619                 $formats_nav =
5620                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5621                                 "raw");
5622                 if ($patch_max) {
5623                         $formats_nav .= " | " .
5624                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5625                                         "patch");
5626                 }
5627
5628                 if (defined $hash_parent &&
5629                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5630                         # commitdiff with two commits given
5631                         my $hash_parent_short = $hash_parent;
5632                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5633                                 $hash_parent_short = substr($hash_parent, 0, 7);
5634                         }
5635                         $formats_nav .=
5636                                 ' (from';
5637                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5638                                 if ($co{'parents'}[$i] eq $hash_parent) {
5639                                         $formats_nav .= ' parent ' . ($i+1);
5640                                         last;
5641                                 }
5642                         }
5643                         $formats_nav .= ': ' .
5644                                 $cgi->a({-href => href(action=>"commitdiff",
5645                                                        hash=>$hash_parent)},
5646                                         esc_html($hash_parent_short)) .
5647                                 ')';
5648                 } elsif (!$co{'parent'}) {
5649                         # --root commitdiff
5650                         $formats_nav .= ' (initial)';
5651                 } elsif (scalar @{$co{'parents'}} == 1) {
5652                         # single parent commit
5653                         $formats_nav .=
5654                                 ' (parent: ' .
5655                                 $cgi->a({-href => href(action=>"commitdiff",
5656                                                        hash=>$co{'parent'})},
5657                                         esc_html(substr($co{'parent'}, 0, 7))) .
5658                                 ')';
5659                 } else {
5660                         # merge commit
5661                         if ($hash_parent eq '--cc') {
5662                                 $formats_nav .= ' | ' .
5663                                         $cgi->a({-href => href(action=>"commitdiff",
5664                                                                hash=>$hash, hash_parent=>'-c')},
5665                                                 'combined');
5666                         } else { # $hash_parent eq '-c'
5667                                 $formats_nav .= ' | ' .
5668                                         $cgi->a({-href => href(action=>"commitdiff",
5669                                                                hash=>$hash, hash_parent=>'--cc')},
5670                                                 'compact');
5671                         }
5672                         $formats_nav .=
5673                                 ' (merge: ' .
5674                                 join(' ', map {
5675                                         $cgi->a({-href => href(action=>"commitdiff",
5676                                                                hash=>$_)},
5677                                                 esc_html(substr($_, 0, 7)));
5678                                 } @{$co{'parents'}} ) .
5679                                 ')';
5680                 }
5681         }
5682
5683         my $hash_parent_param = $hash_parent;
5684         if (!defined $hash_parent_param) {
5685                 # --cc for multiple parents, --root for parentless
5686                 $hash_parent_param =
5687                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5688         }
5689
5690         # read commitdiff
5691         my $fd;
5692         my @difftree;
5693         if ($format eq 'html') {
5694                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5695                         "--no-commit-id", "--patch-with-raw", "--full-index",
5696                         $hash_parent_param, $hash, "--"
5697                         or die_error(500, "Open git-diff-tree failed");
5698
5699                 while (my $line = <$fd>) {
5700                         chomp $line;
5701                         # empty line ends raw part of diff-tree output
5702                         last unless $line;
5703                         push @difftree, scalar parse_difftree_raw_line($line);
5704                 }
5705
5706         } elsif ($format eq 'plain') {
5707                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5708                         '-p', $hash_parent_param, $hash, "--"
5709                         or die_error(500, "Open git-diff-tree failed");
5710         } elsif ($format eq 'patch') {
5711                 # For commit ranges, we limit the output to the number of
5712                 # patches specified in the 'patches' feature.
5713                 # For single commits, we limit the output to a single patch,
5714                 # diverging from the git-format-patch default.
5715                 my @commit_spec = ();
5716                 if ($hash_parent) {
5717                         if ($patch_max > 0) {
5718                                 push @commit_spec, "-$patch_max";
5719                         }
5720                         push @commit_spec, '-n', "$hash_parent..$hash";
5721                 } else {
5722                         if ($params{-single}) {
5723                                 push @commit_spec, '-1';
5724                         } else {
5725                                 if ($patch_max > 0) {
5726                                         push @commit_spec, "-$patch_max";
5727                                 }
5728                                 push @commit_spec, "-n";
5729                         }
5730                         push @commit_spec, '--root', $hash;
5731                 }
5732                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5733                         '--stdout', @commit_spec
5734                         or die_error(500, "Open git-format-patch failed");
5735         } else {
5736                 die_error(400, "Unknown commitdiff format");
5737         }
5738
5739         # non-textual hash id's can be cached
5740         my $expires;
5741         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5742                 $expires = "+1d";
5743         }
5744
5745         # write commit message
5746         if ($format eq 'html') {
5747                 my $refs = git_get_references();
5748                 my $ref = format_ref_marker($refs, $co{'id'});
5749
5750                 git_header_html(undef, $expires);
5751                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5752                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5753                 print "<div class=\"title_text\">\n" .
5754                       "<table class=\"object_header\">\n";
5755                 git_print_authorship_rows(\%co);
5756                 print "</table>".
5757                       "</div>\n";
5758                 print "<div class=\"page_body\">\n";
5759                 if (@{$co{'comment'}} > 1) {
5760                         print "<div class=\"log\">\n";
5761                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5762                         print "</div>\n"; # class="log"
5763                 }
5764
5765         } elsif ($format eq 'plain') {
5766                 my $refs = git_get_references("tags");
5767                 my $tagname = git_get_rev_name_tags($hash);
5768                 my $filename = basename($project) . "-$hash.patch";
5769
5770                 print $cgi->header(
5771                         -type => 'text/plain',
5772                         -charset => 'utf-8',
5773                         -expires => $expires,
5774                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5775                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5776                 print "From: " . to_utf8($co{'author'}) . "\n";
5777                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5778                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5779
5780                 print "X-Git-Tag: $tagname\n" if $tagname;
5781                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5782
5783                 foreach my $line (@{$co{'comment'}}) {
5784                         print to_utf8($line) . "\n";
5785                 }
5786                 print "---\n\n";
5787         } elsif ($format eq 'patch') {
5788                 my $filename = basename($project) . "-$hash.patch";
5789
5790                 print $cgi->header(
5791                         -type => 'text/plain',
5792                         -charset => 'utf-8',
5793                         -expires => $expires,
5794                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5795         }
5796
5797         # write patch
5798         if ($format eq 'html') {
5799                 my $use_parents = !defined $hash_parent ||
5800                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5801                 git_difftree_body(\@difftree, $hash,
5802                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5803                 print "<br/>\n";
5804
5805                 git_patchset_body($fd, \@difftree, $hash,
5806                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5807                 close $fd;
5808                 print "</div>\n"; # class="page_body"
5809                 git_footer_html();
5810
5811         } elsif ($format eq 'plain') {
5812                 local $/ = undef;
5813                 print <$fd>;
5814                 close $fd
5815                         or print "Reading git-diff-tree failed\n";
5816         } elsif ($format eq 'patch') {
5817                 local $/ = undef;
5818                 print <$fd>;
5819                 close $fd
5820                         or print "Reading git-format-patch failed\n";
5821         }
5822 }
5823
5824 sub git_commitdiff_plain {
5825         git_commitdiff(-format => 'plain');
5826 }
5827
5828 # format-patch-style patches
5829 sub git_patch {
5830         git_commitdiff(-format => 'patch', -single=> 1);
5831 }
5832
5833 sub git_patches {
5834         git_commitdiff(-format => 'patch');
5835 }
5836
5837 sub git_history {
5838         if (!defined $hash_base) {
5839                 $hash_base = git_get_head_hash($project);
5840         }
5841         if (!defined $page) {
5842                 $page = 0;
5843         }
5844         my $ftype;
5845         my %co = parse_commit($hash_base)
5846             or die_error(404, "Unknown commit object");
5847
5848         my $refs = git_get_references();
5849         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5850
5851         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5852                                        $file_name, "--full-history")
5853             or die_error(404, "No such file or directory on given branch");
5854
5855         if (!defined $hash && defined $file_name) {
5856                 # some commits could have deleted file in question,
5857                 # and not have it in tree, but one of them has to have it
5858                 for (my $i = 0; $i <= @commitlist; $i++) {
5859                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5860                         last if defined $hash;
5861                 }
5862         }
5863         if (defined $hash) {
5864                 $ftype = git_get_type($hash);
5865         }
5866         if (!defined $ftype) {
5867                 die_error(500, "Unknown type of object");
5868         }
5869
5870         my $paging_nav = '';
5871         if ($page > 0) {
5872                 $paging_nav .=
5873                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5874                                                file_name=>$file_name)},
5875                                 "first");
5876                 $paging_nav .= " &sdot; " .
5877                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5878                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5879         } else {
5880                 $paging_nav .= "first";
5881                 $paging_nav .= " &sdot; prev";
5882         }
5883         my $next_link = '';
5884         if ($#commitlist >= 100) {
5885                 $next_link =
5886                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5887                                  -accesskey => "n", -title => "Alt-n"}, "next");
5888                 $paging_nav .= " &sdot; $next_link";
5889         } else {
5890                 $paging_nav .= " &sdot; next";
5891         }
5892
5893         git_header_html();
5894         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5895         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5896         git_print_page_path($file_name, $ftype, $hash_base);
5897
5898         git_history_body(\@commitlist, 0, 99,
5899                          $refs, $hash_base, $ftype, $next_link);
5900
5901         git_footer_html();
5902 }
5903
5904 sub git_search {
5905         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5906         if (!defined $searchtext) {
5907                 die_error(400, "Text field is empty");
5908         }
5909         if (!defined $hash) {
5910                 $hash = git_get_head_hash($project);
5911         }
5912         my %co = parse_commit($hash);
5913         if (!%co) {
5914                 die_error(404, "Unknown commit object");
5915         }
5916         if (!defined $page) {
5917                 $page = 0;
5918         }
5919
5920         $searchtype ||= 'commit';
5921         if ($searchtype eq 'pickaxe') {
5922                 # pickaxe may take all resources of your box and run for several minutes
5923                 # with every query - so decide by yourself how public you make this feature
5924                 gitweb_check_feature('pickaxe')
5925                     or die_error(403, "Pickaxe is disabled");
5926         }
5927         if ($searchtype eq 'grep') {
5928                 gitweb_check_feature('grep')
5929                     or die_error(403, "Grep is disabled");
5930         }
5931
5932         git_header_html();
5933
5934         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5935                 my $greptype;
5936                 if ($searchtype eq 'commit') {
5937                         $greptype = "--grep=";
5938                 } elsif ($searchtype eq 'author') {
5939                         $greptype = "--author=";
5940                 } elsif ($searchtype eq 'committer') {
5941                         $greptype = "--committer=";
5942                 }
5943                 $greptype .= $searchtext;
5944                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5945                                                $greptype, '--regexp-ignore-case',
5946                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5947
5948                 my $paging_nav = '';
5949                 if ($page > 0) {
5950                         $paging_nav .=
5951                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5952                                                        searchtext=>$searchtext,
5953                                                        searchtype=>$searchtype)},
5954                                         "first");
5955                         $paging_nav .= " &sdot; " .
5956                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5957                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5958                 } else {
5959                         $paging_nav .= "first";
5960                         $paging_nav .= " &sdot; prev";
5961                 }
5962                 my $next_link = '';
5963                 if ($#commitlist >= 100) {
5964                         $next_link =
5965                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5966                                          -accesskey => "n", -title => "Alt-n"}, "next");
5967                         $paging_nav .= " &sdot; $next_link";
5968                 } else {
5969                         $paging_nav .= " &sdot; next";
5970                 }
5971
5972                 if ($#commitlist >= 100) {
5973                 }
5974
5975                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5976                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5977                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5978         }
5979
5980         if ($searchtype eq 'pickaxe') {
5981                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5982                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5983
5984                 print "<table class=\"pickaxe search\">\n";
5985                 my $alternate = 1;
5986                 local $/ = "\n";
5987                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5988                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5989                         ($search_use_regexp ? '--pickaxe-regex' : ());
5990                 undef %co;
5991                 my @files;
5992                 while (my $line = <$fd>) {
5993                         chomp $line;
5994                         next unless $line;
5995
5996                         my %set = parse_difftree_raw_line($line);
5997                         if (defined $set{'commit'}) {
5998                                 # finish previous commit
5999                                 if (%co) {
6000                                         print "</td>\n" .
6001                                               "<td class=\"link\">" .
6002                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6003                                               " | " .
6004                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6005                                         print "</td>\n" .
6006                                               "</tr>\n";
6007                                 }
6008
6009                                 if ($alternate) {
6010                                         print "<tr class=\"dark\">\n";
6011                                 } else {
6012                                         print "<tr class=\"light\">\n";
6013                                 }
6014                                 $alternate ^= 1;
6015                                 %co = parse_commit($set{'commit'});
6016                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6017                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6018                                       "<td><i>$author</i></td>\n" .
6019                                       "<td>" .
6020                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6021                                               -class => "list subject"},
6022                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6023                         } elsif (defined $set{'to_id'}) {
6024                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6025
6026                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6027                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6028                                               -class => "list"},
6029                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6030                                       "<br/>\n";
6031                         }
6032                 }
6033                 close $fd;
6034
6035                 # finish last commit (warning: repetition!)
6036                 if (%co) {
6037                         print "</td>\n" .
6038                               "<td class=\"link\">" .
6039                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6040                               " | " .
6041                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6042                         print "</td>\n" .
6043                               "</tr>\n";
6044                 }
6045
6046                 print "</table>\n";
6047         }
6048
6049         if ($searchtype eq 'grep') {
6050                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6051                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6052
6053                 print "<table class=\"grep_search\">\n";
6054                 my $alternate = 1;
6055                 my $matches = 0;
6056                 local $/ = "\n";
6057                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6058                         $search_use_regexp ? ('-E', '-i') : '-F',
6059                         $searchtext, $co{'tree'};
6060                 my $lastfile = '';
6061                 while (my $line = <$fd>) {
6062                         chomp $line;
6063                         my ($file, $lno, $ltext, $binary);
6064                         last if ($matches++ > 1000);
6065                         if ($line =~ /^Binary file (.+) matches$/) {
6066                                 $file = $1;
6067                                 $binary = 1;
6068                         } else {
6069                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6070                         }
6071                         if ($file ne $lastfile) {
6072                                 $lastfile and print "</td></tr>\n";
6073                                 if ($alternate++) {
6074                                         print "<tr class=\"dark\">\n";
6075                                 } else {
6076                                         print "<tr class=\"light\">\n";
6077                                 }
6078                                 print "<td class=\"list\">".
6079                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6080                                                                file_name=>"$file"),
6081                                                 -class => "list"}, esc_path($file));
6082                                 print "</td><td>\n";
6083                                 $lastfile = $file;
6084                         }
6085                         if ($binary) {
6086                                 print "<div class=\"binary\">Binary file</div>\n";
6087                         } else {
6088                                 $ltext = untabify($ltext);
6089                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6090                                         $ltext = esc_html($1, -nbsp=>1);
6091                                         $ltext .= '<span class="match">';
6092                                         $ltext .= esc_html($2, -nbsp=>1);
6093                                         $ltext .= '</span>';
6094                                         $ltext .= esc_html($3, -nbsp=>1);
6095                                 } else {
6096                                         $ltext = esc_html($ltext, -nbsp=>1);
6097                                 }
6098                                 print "<div class=\"pre\">" .
6099                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6100                                                                file_name=>"$file").'#l'.$lno,
6101                                                 -class => "linenr"}, sprintf('%4i', $lno))
6102                                         . ' ' .  $ltext . "</div>\n";
6103                         }
6104                 }
6105                 if ($lastfile) {
6106                         print "</td></tr>\n";
6107                         if ($matches > 1000) {
6108                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6109                         }
6110                 } else {
6111                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6112                 }
6113                 close $fd;
6114
6115                 print "</table>\n";
6116         }
6117         git_footer_html();
6118 }
6119
6120 sub git_search_help {
6121         git_header_html();
6122         git_print_page_nav('','', $hash,$hash,$hash);
6123         print <<EOT;
6124 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6125 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6126 the pattern entered is recognized as the POSIX extended
6127 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6128 insensitive).</p>
6129 <dl>
6130 <dt><b>commit</b></dt>
6131 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6132 EOT
6133         my $have_grep = gitweb_check_feature('grep');
6134         if ($have_grep) {
6135                 print <<EOT;
6136 <dt><b>grep</b></dt>
6137 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6138     a different one) are searched for the given pattern. On large trees, this search can take
6139 a while and put some strain on the server, so please use it with some consideration. Note that
6140 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6141 case-sensitive.</dd>
6142 EOT
6143         }
6144         print <<EOT;
6145 <dt><b>author</b></dt>
6146 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6147 <dt><b>committer</b></dt>
6148 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6149 EOT
6150         my $have_pickaxe = gitweb_check_feature('pickaxe');
6151         if ($have_pickaxe) {
6152                 print <<EOT;
6153 <dt><b>pickaxe</b></dt>
6154 <dd>All commits that caused the string to appear or disappear from any file (changes that
6155 added, removed or "modified" the string) will be listed. This search can take a while and
6156 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6157 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6158 EOT
6159         }
6160         print "</dl>\n";
6161         git_footer_html();
6162 }
6163
6164 sub git_shortlog {
6165         my $head = git_get_head_hash($project);
6166         if (!defined $hash) {
6167                 $hash = $head;
6168         }
6169         if (!defined $page) {
6170                 $page = 0;
6171         }
6172         my $refs = git_get_references();
6173
6174         my $commit_hash = $hash;
6175         if (defined $hash_parent) {
6176                 $commit_hash = "$hash_parent..$hash";
6177         }
6178         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
6179
6180         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
6181         my $next_link = '';
6182         if ($#commitlist >= 100) {
6183                 $next_link =
6184                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6185                                  -accesskey => "n", -title => "Alt-n"}, "next");
6186         }
6187         my $patch_max = gitweb_check_feature('patches');
6188         if ($patch_max) {
6189                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6190                         $paging_nav .= " &sdot; " .
6191                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6192                                         "patches");
6193                 }
6194         }
6195
6196         git_header_html();
6197         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
6198         git_print_header_div('summary', $project);
6199
6200         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
6201
6202         git_footer_html();
6203 }
6204
6205 ## ......................................................................
6206 ## feeds (RSS, Atom; OPML)
6207
6208 sub git_feed {
6209         my $format = shift || 'atom';
6210         my $have_blame = gitweb_check_feature('blame');
6211
6212         # Atom: http://www.atomenabled.org/developers/syndication/
6213         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6214         if ($format ne 'rss' && $format ne 'atom') {
6215                 die_error(400, "Unknown web feed format");
6216         }
6217
6218         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6219         my $head = $hash || 'HEAD';
6220         my @commitlist = parse_commits($head, 150, 0, $file_name);
6221
6222         my %latest_commit;
6223         my %latest_date;
6224         my $content_type = "application/$format+xml";
6225         if (defined $cgi->http('HTTP_ACCEPT') &&
6226                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6227                 # browser (feed reader) prefers text/xml
6228                 $content_type = 'text/xml';
6229         }
6230         if (defined($commitlist[0])) {
6231                 %latest_commit = %{$commitlist[0]};
6232                 my $latest_epoch = $latest_commit{'committer_epoch'};
6233                 %latest_date   = parse_date($latest_epoch);
6234                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6235                 if (defined $if_modified) {
6236                         my $since;
6237                         if (eval { require HTTP::Date; 1; }) {
6238                                 $since = HTTP::Date::str2time($if_modified);
6239                         } elsif (eval { require Time::ParseDate; 1; }) {
6240                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6241                         }
6242                         if (defined $since && $latest_epoch <= $since) {
6243                                 print $cgi->header(
6244                                         -type => $content_type,
6245                                         -charset => 'utf-8',
6246                                         -last_modified => $latest_date{'rfc2822'},
6247                                         -status => '304 Not Modified');
6248                                 return;
6249                         }
6250                 }
6251                 print $cgi->header(
6252                         -type => $content_type,
6253                         -charset => 'utf-8',
6254                         -last_modified => $latest_date{'rfc2822'});
6255         } else {
6256                 print $cgi->header(
6257                         -type => $content_type,
6258                         -charset => 'utf-8');
6259         }
6260
6261         # Optimization: skip generating the body if client asks only
6262         # for Last-Modified date.
6263         return if ($cgi->request_method() eq 'HEAD');
6264
6265         # header variables
6266         my $title = "$site_name - $project/$action";
6267         my $feed_type = 'log';
6268         if (defined $hash) {
6269                 $title .= " - '$hash'";
6270                 $feed_type = 'branch log';
6271                 if (defined $file_name) {
6272                         $title .= " :: $file_name";
6273                         $feed_type = 'history';
6274                 }
6275         } elsif (defined $file_name) {
6276                 $title .= " - $file_name";
6277                 $feed_type = 'history';
6278         }
6279         $title .= " $feed_type";
6280         my $descr = git_get_project_description($project);
6281         if (defined $descr) {
6282                 $descr = esc_html($descr);
6283         } else {
6284                 $descr = "$project " .
6285                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6286                          " feed";
6287         }
6288         my $owner = git_get_project_owner($project);
6289         $owner = esc_html($owner);
6290
6291         #header
6292         my $alt_url;
6293         if (defined $file_name) {
6294                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6295         } elsif (defined $hash) {
6296                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6297         } else {
6298                 $alt_url = href(-full=>1, action=>"summary");
6299         }
6300         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6301         if ($format eq 'rss') {
6302                 print <<XML;
6303 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6304 <channel>
6305 XML
6306                 print "<title>$title</title>\n" .
6307                       "<link>$alt_url</link>\n" .
6308                       "<description>$descr</description>\n" .
6309                       "<language>en</language>\n" .
6310                       # project owner is responsible for 'editorial' content
6311                       "<managingEditor>$owner</managingEditor>\n";
6312                 if (defined $logo || defined $favicon) {
6313                         # prefer the logo to the favicon, since RSS
6314                         # doesn't allow both
6315                         my $img = esc_url($logo || $favicon);
6316                         print "<image>\n" .
6317                               "<url>$img</url>\n" .
6318                               "<title>$title</title>\n" .
6319                               "<link>$alt_url</link>\n" .
6320                               "</image>\n";
6321                 }
6322                 if (%latest_date) {
6323                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6324                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6325                 }
6326                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6327         } elsif ($format eq 'atom') {
6328                 print <<XML;
6329 <feed xmlns="http://www.w3.org/2005/Atom">
6330 XML
6331                 print "<title>$title</title>\n" .
6332                       "<subtitle>$descr</subtitle>\n" .
6333                       '<link rel="alternate" type="text/html" href="' .
6334                       $alt_url . '" />' . "\n" .
6335                       '<link rel="self" type="' . $content_type . '" href="' .
6336                       $cgi->self_url() . '" />' . "\n" .
6337                       "<id>" . href(-full=>1) . "</id>\n" .
6338                       # use project owner for feed author
6339                       "<author><name>$owner</name></author>\n";
6340                 if (defined $favicon) {
6341                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6342                 }
6343                 if (defined $logo_url) {
6344                         # not twice as wide as tall: 72 x 27 pixels
6345                         print "<logo>" . esc_url($logo) . "</logo>\n";
6346                 }
6347                 if (! %latest_date) {
6348                         # dummy date to keep the feed valid until commits trickle in:
6349                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6350                 } else {
6351                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6352                 }
6353                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6354         }
6355
6356         # contents
6357         for (my $i = 0; $i <= $#commitlist; $i++) {
6358                 my %co = %{$commitlist[$i]};
6359                 my $commit = $co{'id'};
6360                 # we read 150, we always show 30 and the ones more recent than 48 hours
6361                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6362                         last;
6363                 }
6364                 my %cd = parse_date($co{'author_epoch'});
6365
6366                 # get list of changed files
6367                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6368                         $co{'parent'} || "--root",
6369                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6370                         or next;
6371                 my @difftree = map { chomp; $_ } <$fd>;
6372                 close $fd
6373                         or next;
6374
6375                 # print element (entry, item)
6376                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6377                 if ($format eq 'rss') {
6378                         print "<item>\n" .
6379                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6380                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6381                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6382                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6383                               "<link>$co_url</link>\n" .
6384                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6385                               "<content:encoded>" .
6386                               "<![CDATA[\n";
6387                 } elsif ($format eq 'atom') {
6388                         print "<entry>\n" .
6389                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6390                               "<updated>$cd{'iso-8601'}</updated>\n" .
6391                               "<author>\n" .
6392                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6393                         if ($co{'author_email'}) {
6394                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6395                         }
6396                         print "</author>\n" .
6397                               # use committer for contributor
6398                               "<contributor>\n" .
6399                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6400                         if ($co{'committer_email'}) {
6401                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6402                         }
6403                         print "</contributor>\n" .
6404                               "<published>$cd{'iso-8601'}</published>\n" .
6405                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6406                               "<id>$co_url</id>\n" .
6407                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6408                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6409                 }
6410                 my $comment = $co{'comment'};
6411                 print "<pre>\n";
6412                 foreach my $line (@$comment) {
6413                         $line = esc_html($line);
6414                         print "$line\n";
6415                 }
6416                 print "</pre><ul>\n";
6417                 foreach my $difftree_line (@difftree) {
6418                         my %difftree = parse_difftree_raw_line($difftree_line);
6419                         next if !$difftree{'from_id'};
6420
6421                         my $file = $difftree{'file'} || $difftree{'to_file'};
6422
6423                         print "<li>" .
6424                               "[" .
6425                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6426                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6427                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6428                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6429                                       -title => "diff"}, 'D');
6430                         if ($have_blame) {
6431                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6432                                                              file_name=>$file, hash_base=>$commit),
6433                                               -title => "blame"}, 'B');
6434                         }
6435                         # if this is not a feed of a file history
6436                         if (!defined $file_name || $file_name ne $file) {
6437                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6438                                                              file_name=>$file, hash=>$commit),
6439                                               -title => "history"}, 'H');
6440                         }
6441                         $file = esc_path($file);
6442                         print "] ".
6443                               "$file</li>\n";
6444                 }
6445                 if ($format eq 'rss') {
6446                         print "</ul>]]>\n" .
6447                               "</content:encoded>\n" .
6448                               "</item>\n";
6449                 } elsif ($format eq 'atom') {
6450                         print "</ul>\n</div>\n" .
6451                               "</content>\n" .
6452                               "</entry>\n";
6453                 }
6454         }
6455
6456         # end of feed
6457         if ($format eq 'rss') {
6458                 print "</channel>\n</rss>\n";
6459         } elsif ($format eq 'atom') {
6460                 print "</feed>\n";
6461         }
6462 }
6463
6464 sub git_rss {
6465         git_feed('rss');
6466 }
6467
6468 sub git_atom {
6469         git_feed('atom');
6470 }
6471
6472 sub git_opml {
6473         my @list = git_get_projects_list();
6474
6475         print $cgi->header(
6476                 -type => 'text/xml',
6477                 -charset => 'utf-8',
6478                 -content_disposition => 'inline; filename="opml.xml"');
6479
6480         print <<XML;
6481 <?xml version="1.0" encoding="utf-8"?>
6482 <opml version="1.0">
6483 <head>
6484   <title>$site_name OPML Export</title>
6485 </head>
6486 <body>
6487 <outline text="git RSS feeds">
6488 XML
6489
6490         foreach my $pr (@list) {
6491                 my %proj = %$pr;
6492                 my $head = git_get_head_hash($proj{'path'});
6493                 if (!defined $head) {
6494                         next;
6495                 }
6496                 $git_dir = "$projectroot/$proj{'path'}";
6497                 my %co = parse_commit($head);
6498                 if (!%co) {
6499                         next;
6500                 }
6501
6502                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6503                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6504                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6505                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6506         }
6507         print <<XML;
6508 </outline>
6509 </body>
6510 </opml>
6511 XML
6512 }