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; "'$a'" } @_ );
1982 }
1983
1984 # get HEAD ref of given project as hash
1985 sub git_get_head_hash {
1986         return git_get_full_hash(shift, 'HEAD');
1987 }
1988
1989 sub git_get_full_hash {
1990         return git_get_hash(@_);
1991 }
1992
1993 sub git_get_short_hash {
1994         return git_get_hash(@_, '--short=7');
1995 }
1996
1997 sub git_get_hash {
1998         my ($project, $hash, @options) = @_;
1999         my $o_git_dir = $git_dir;
2000         my $retval = undef;
2001         $git_dir = "$projectroot/$project";
2002         if (open my $fd, '-|', git_cmd(), 'rev-parse',
2003             '--verify', '-q', @options, $hash) {
2004                 $retval = <$fd>;
2005                 chomp $retval if defined $retval;
2006                 close $fd;
2007         }
2008         if (defined $o_git_dir) {
2009                 $git_dir = $o_git_dir;
2010         }
2011         return $retval;
2012 }
2013
2014 # get type of given object
2015 sub git_get_type {
2016         my $hash = shift;
2017
2018         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2019         my $type = <$fd>;
2020         close $fd or return;
2021         chomp $type;
2022         return $type;
2023 }
2024
2025 # repository configuration
2026 our $config_file = '';
2027 our %config;
2028
2029 # store multiple values for single key as anonymous array reference
2030 # single values stored directly in the hash, not as [ <value> ]
2031 sub hash_set_multi {
2032         my ($hash, $key, $value) = @_;
2033
2034         if (!exists $hash->{$key}) {
2035                 $hash->{$key} = $value;
2036         } elsif (!ref $hash->{$key}) {
2037                 $hash->{$key} = [ $hash->{$key}, $value ];
2038         } else {
2039                 push @{$hash->{$key}}, $value;
2040         }
2041 }
2042
2043 # return hash of git project configuration
2044 # optionally limited to some section, e.g. 'gitweb'
2045 sub git_parse_project_config {
2046         my $section_regexp = shift;
2047         my %config;
2048
2049         local $/ = "\0";
2050
2051         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2052                 or return;
2053
2054         while (my $keyval = <$fh>) {
2055                 chomp $keyval;
2056                 my ($key, $value) = split(/\n/, $keyval, 2);
2057
2058                 hash_set_multi(\%config, $key, $value)
2059                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2060         }
2061         close $fh;
2062
2063         return %config;
2064 }
2065
2066 # convert config value to boolean: 'true' or 'false'
2067 # no value, number > 0, 'true' and 'yes' values are true
2068 # rest of values are treated as false (never as error)
2069 sub config_to_bool {
2070         my $val = shift;
2071
2072         return 1 if !defined $val;             # section.key
2073
2074         # strip leading and trailing whitespace
2075         $val =~ s/^\s+//;
2076         $val =~ s/\s+$//;
2077
2078         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2079                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2080 }
2081
2082 # convert config value to simple decimal number
2083 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2084 # to be multiplied by 1024, 1048576, or 1073741824
2085 sub config_to_int {
2086         my $val = shift;
2087
2088         # strip leading and trailing whitespace
2089         $val =~ s/^\s+//;
2090         $val =~ s/\s+$//;
2091
2092         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2093                 $unit = lc($unit);
2094                 # unknown unit is treated as 1
2095                 return $num * ($unit eq 'g' ? 1073741824 :
2096                                $unit eq 'm' ?    1048576 :
2097                                $unit eq 'k' ?       1024 : 1);
2098         }
2099         return $val;
2100 }
2101
2102 # convert config value to array reference, if needed
2103 sub config_to_multi {
2104         my $val = shift;
2105
2106         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2107 }
2108
2109 sub git_get_project_config {
2110         my ($key, $type) = @_;
2111
2112         # key sanity check
2113         return unless ($key);
2114         $key =~ s/^gitweb\.//;
2115         return if ($key =~ m/\W/);
2116
2117         # type sanity check
2118         if (defined $type) {
2119                 $type =~ s/^--//;
2120                 $type = undef
2121                         unless ($type eq 'bool' || $type eq 'int');
2122         }
2123
2124         # get config
2125         if (!defined $config_file ||
2126             $config_file ne "$git_dir/config") {
2127                 %config = git_parse_project_config('gitweb');
2128                 $config_file = "$git_dir/config";
2129         }
2130
2131         # check if config variable (key) exists
2132         return unless exists $config{"gitweb.$key"};
2133
2134         # ensure given type
2135         if (!defined $type) {
2136                 return $config{"gitweb.$key"};
2137         } elsif ($type eq 'bool') {
2138                 # backward compatibility: 'git config --bool' returns true/false
2139                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2140         } elsif ($type eq 'int') {
2141                 return config_to_int($config{"gitweb.$key"});
2142         }
2143         return $config{"gitweb.$key"};
2144 }
2145
2146 # get hash of given path at given ref
2147 sub git_get_hash_by_path {
2148         my $base = shift;
2149         my $path = shift || return undef;
2150         my $type = shift;
2151
2152         $path =~ s,/+$,,;
2153
2154         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2155                 or die_error(500, "Open git-ls-tree failed");
2156         my $line = <$fd>;
2157         close $fd or return undef;
2158
2159         if (!defined $line) {
2160                 # there is no tree or hash given by $path at $base
2161                 return undef;
2162         }
2163
2164         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2165         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2166         if (defined $type && $type ne $2) {
2167                 # type doesn't match
2168                 return undef;
2169         }
2170         return $3;
2171 }
2172
2173 # get path of entry with given hash at given tree-ish (ref)
2174 # used to get 'from' filename for combined diff (merge commit) for renames
2175 sub git_get_path_by_hash {
2176         my $base = shift || return;
2177         my $hash = shift || return;
2178
2179         local $/ = "\0";
2180
2181         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2182                 or return undef;
2183         while (my $line = <$fd>) {
2184                 chomp $line;
2185
2186                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2187                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2188                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2189                         close $fd;
2190                         return $1;
2191                 }
2192         }
2193         close $fd;
2194         return undef;
2195 }
2196
2197 ## ......................................................................
2198 ## git utility functions, directly accessing git repository
2199
2200 sub git_get_project_description {
2201         my $path = shift;
2202
2203         $git_dir = "$projectroot/$path";
2204         open my $fd, '<', "$git_dir/description"
2205                 or return git_get_project_config('description');
2206         my $descr = <$fd>;
2207         close $fd;
2208         if (defined $descr) {
2209                 chomp $descr;
2210         }
2211         return $descr;
2212 }
2213
2214 sub git_get_project_ctags {
2215         my $path = shift;
2216         my $ctags = {};
2217
2218         $git_dir = "$projectroot/$path";
2219         opendir my $dh, "$git_dir/ctags"
2220                 or return $ctags;
2221         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2222                 open my $ct, '<', $_ or next;
2223                 my $val = <$ct>;
2224                 chomp $val;
2225                 close $ct;
2226                 my $ctag = $_; $ctag =~ s#.*/##;
2227                 $ctags->{$ctag} = $val;
2228         }
2229         closedir $dh;
2230         $ctags;
2231 }
2232
2233 sub git_populate_project_tagcloud {
2234         my $ctags = shift;
2235
2236         # First, merge different-cased tags; tags vote on casing
2237         my %ctags_lc;
2238         foreach (keys %$ctags) {
2239                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2240                 if (not $ctags_lc{lc $_}->{topcount}
2241                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2242                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2243                         $ctags_lc{lc $_}->{topname} = $_;
2244                 }
2245         }
2246
2247         my $cloud;
2248         if (eval { require HTML::TagCloud; 1; }) {
2249                 $cloud = HTML::TagCloud->new;
2250                 foreach (sort keys %ctags_lc) {
2251                         # Pad the title with spaces so that the cloud looks
2252                         # less crammed.
2253                         my $title = $ctags_lc{$_}->{topname};
2254                         $title =~ s/ /&nbsp;/g;
2255                         $title =~ s/^/&nbsp;/g;
2256                         $title =~ s/$/&nbsp;/g;
2257                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2258                 }
2259         } else {
2260                 $cloud = \%ctags_lc;
2261         }
2262         $cloud;
2263 }
2264
2265 sub git_show_project_tagcloud {
2266         my ($cloud, $count) = @_;
2267         print STDERR ref($cloud)."..\n";
2268         if (ref $cloud eq 'HTML::TagCloud') {
2269                 return $cloud->html_and_css($count);
2270         } else {
2271                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2272                 return '<p align="center">' . join (', ', map {
2273                         "<a href=\"$home_link?by_tag=$_\">$cloud->{$_}->{topname}</a>"
2274                 } splice(@tags, 0, $count)) . '</p>';
2275         }
2276 }
2277
2278 sub git_get_project_url_list {
2279         my $path = shift;
2280
2281         $git_dir = "$projectroot/$path";
2282         open my $fd, '<', "$git_dir/cloneurl"
2283                 or return wantarray ?
2284                 @{ config_to_multi(git_get_project_config('url')) } :
2285                    config_to_multi(git_get_project_config('url'));
2286         my @git_project_url_list = map { chomp; $_ } <$fd>;
2287         close $fd;
2288
2289         return wantarray ? @git_project_url_list : \@git_project_url_list;
2290 }
2291
2292 sub git_get_projects_list {
2293         my ($filter) = @_;
2294         my @list;
2295
2296         $filter ||= '';
2297         $filter =~ s/\.git$//;
2298
2299         my $check_forks = gitweb_check_feature('forks');
2300
2301         if (-d $projects_list) {
2302                 # search in directory
2303                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2304                 # remove the trailing "/"
2305                 $dir =~ s!/+$!!;
2306                 my $pfxlen = length("$dir");
2307                 my $pfxdepth = ($dir =~ tr!/!!);
2308
2309                 File::Find::find({
2310                         follow_fast => 1, # follow symbolic links
2311                         follow_skip => 2, # ignore duplicates
2312                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2313                         wanted => sub {
2314                                 # skip project-list toplevel, if we get it.
2315                                 return if (m!^[/.]$!);
2316                                 # only directories can be git repositories
2317                                 return unless (-d $_);
2318                                 # don't traverse too deep (Find is super slow on os x)
2319                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2320                                         $File::Find::prune = 1;
2321                                         return;
2322                                 }
2323
2324                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2325                                 # we check related file in $projectroot
2326                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2327                                 if (check_export_ok("$projectroot/$path")) {
2328                                         push @list, { path => $path };
2329                                         $File::Find::prune = 1;
2330                                 }
2331                         },
2332                 }, "$dir");
2333
2334         } elsif (-f $projects_list) {
2335                 # read from file(url-encoded):
2336                 # 'git%2Fgit.git Linus+Torvalds'
2337                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2338                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2339                 my %paths;
2340                 open my $fd, '<', $projects_list or return;
2341         PROJECT:
2342                 while (my $line = <$fd>) {
2343                         chomp $line;
2344                         my ($path, $owner) = split ' ', $line;
2345                         $path = unescape($path);
2346                         $owner = unescape($owner);
2347                         if (!defined $path) {
2348                                 next;
2349                         }
2350                         if ($filter ne '') {
2351                                 # looking for forks;
2352                                 my $pfx = substr($path, 0, length($filter));
2353                                 if ($pfx ne $filter) {
2354                                         next PROJECT;
2355                                 }
2356                                 my $sfx = substr($path, length($filter));
2357                                 if ($sfx !~ /^\/.*\.git$/) {
2358                                         next PROJECT;
2359                                 }
2360                         } elsif ($check_forks) {
2361                         PATH:
2362                                 foreach my $filter (keys %paths) {
2363                                         # looking for forks;
2364                                         my $pfx = substr($path, 0, length($filter));
2365                                         if ($pfx ne $filter) {
2366                                                 next PATH;
2367                                         }
2368                                         my $sfx = substr($path, length($filter));
2369                                         if ($sfx !~ /^\/.*\.git$/) {
2370                                                 next PATH;
2371                                         }
2372                                         # is a fork, don't include it in
2373                                         # the list
2374                                         next PROJECT;
2375                                 }
2376                         }
2377                         if (check_export_ok("$projectroot/$path")) {
2378                                 my $pr = {
2379                                         path => $path,
2380                                         owner => to_utf8($owner),
2381                                 };
2382                                 push @list, $pr;
2383                                 (my $forks_path = $path) =~ s/\.git$//;
2384                                 $paths{$forks_path}++;
2385                         }
2386                 }
2387                 close $fd;
2388         }
2389         return @list;
2390 }
2391
2392 our $gitweb_project_owner = undef;
2393 sub git_get_project_list_from_file {
2394
2395         return if (defined $gitweb_project_owner);
2396
2397         $gitweb_project_owner = {};
2398         # read from file (url-encoded):
2399         # 'git%2Fgit.git Linus+Torvalds'
2400         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2401         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2402         if (-f $projects_list) {
2403                 open(my $fd, '<', $projects_list);
2404                 while (my $line = <$fd>) {
2405                         chomp $line;
2406                         my ($pr, $ow) = split ' ', $line;
2407                         $pr = unescape($pr);
2408                         $ow = unescape($ow);
2409                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2410                 }
2411                 close $fd;
2412         }
2413 }
2414
2415 sub git_get_project_owner {
2416         my $project = shift;
2417         my $owner;
2418
2419         return undef unless $project;
2420         $git_dir = "$projectroot/$project";
2421
2422         if (!defined $gitweb_project_owner) {
2423                 git_get_project_list_from_file();
2424         }
2425
2426         if (exists $gitweb_project_owner->{$project}) {
2427                 $owner = $gitweb_project_owner->{$project};
2428         }
2429         if (!defined $owner){
2430                 $owner = git_get_project_config('owner');
2431         }
2432         if (!defined $owner) {
2433                 $owner = get_file_owner("$git_dir");
2434         }
2435
2436         return $owner;
2437 }
2438
2439 sub git_get_last_activity {
2440         my ($path) = @_;
2441         my $fd;
2442
2443         $git_dir = "$projectroot/$path";
2444         open($fd, "-|", git_cmd(), 'for-each-ref',
2445              '--format=%(committer)',
2446              '--sort=-committerdate',
2447              '--count=1',
2448              'refs/heads') or return;
2449         my $most_recent = <$fd>;
2450         close $fd or return;
2451         if (defined $most_recent &&
2452             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2453                 my $timestamp = $1;
2454                 my $age = time - $timestamp;
2455                 return ($age, age_string($age));
2456         }
2457         return (undef, undef);
2458 }
2459
2460 sub git_get_references {
2461         my $type = shift || "";
2462         my %refs;
2463         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2464         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2465         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2466                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2467                 or return;
2468
2469         while (my $line = <$fd>) {
2470                 chomp $line;
2471                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2472                         if (defined $refs{$1}) {
2473                                 push @{$refs{$1}}, $2;
2474                         } else {
2475                                 $refs{$1} = [ $2 ];
2476                         }
2477                 }
2478         }
2479         close $fd or return;
2480         return \%refs;
2481 }
2482
2483 sub git_get_rev_name_tags {
2484         my $hash = shift || return undef;
2485
2486         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2487                 or return;
2488         my $name_rev = <$fd>;
2489         close $fd;
2490
2491         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2492                 return $1;
2493         } else {
2494                 # catches also '$hash undefined' output
2495                 return undef;
2496         }
2497 }
2498
2499 ## ----------------------------------------------------------------------
2500 ## parse to hash functions
2501
2502 sub parse_date {
2503         my $epoch = shift;
2504         my $tz = shift || "-0000";
2505
2506         my %date;
2507         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2508         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2509         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2510         $date{'hour'} = $hour;
2511         $date{'minute'} = $min;
2512         $date{'mday'} = $mday;
2513         $date{'day'} = $days[$wday];
2514         $date{'month'} = $months[$mon];
2515         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2516                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2517         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2518                              $mday, $months[$mon], $hour ,$min;
2519         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2520                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2521
2522         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2523         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2524         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2525         $date{'hour_local'} = $hour;
2526         $date{'minute_local'} = $min;
2527         $date{'tz_local'} = $tz;
2528         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2529                                   1900+$year, $mon+1, $mday,
2530                                   $hour, $min, $sec, $tz);
2531         return %date;
2532 }
2533
2534 sub parse_tag {
2535         my $tag_id = shift;
2536         my %tag;
2537         my @comment;
2538
2539         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2540         $tag{'id'} = $tag_id;
2541         while (my $line = <$fd>) {
2542                 chomp $line;
2543                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2544                         $tag{'object'} = $1;
2545                 } elsif ($line =~ m/^type (.+)$/) {
2546                         $tag{'type'} = $1;
2547                 } elsif ($line =~ m/^tag (.+)$/) {
2548                         $tag{'name'} = $1;
2549                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2550                         $tag{'author'} = $1;
2551                         $tag{'author_epoch'} = $2;
2552                         $tag{'author_tz'} = $3;
2553                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2554                                 $tag{'author_name'}  = $1;
2555                                 $tag{'author_email'} = $2;
2556                         } else {
2557                                 $tag{'author_name'} = $tag{'author'};
2558                         }
2559                 } elsif ($line =~ m/--BEGIN/) {
2560                         push @comment, $line;
2561                         last;
2562                 } elsif ($line eq "") {
2563                         last;
2564                 }
2565         }
2566         push @comment, <$fd>;
2567         $tag{'comment'} = \@comment;
2568         close $fd or return;
2569         if (!defined $tag{'name'}) {
2570                 return
2571         };
2572         return %tag
2573 }
2574
2575 sub parse_commit_text {
2576         my ($commit_text, $withparents) = @_;
2577         my @commit_lines = split '\n', $commit_text;
2578         my %co;
2579
2580         pop @commit_lines; # Remove '\0'
2581
2582         if (! @commit_lines) {
2583                 return;
2584         }
2585
2586         my $header = shift @commit_lines;
2587         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2588                 return;
2589         }
2590         ($co{'id'}, my @parents) = split ' ', $header;
2591         while (my $line = shift @commit_lines) {
2592                 last if $line eq "\n";
2593                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2594                         $co{'tree'} = $1;
2595                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2596                         push @parents, $1;
2597                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2598                         $co{'author'} = to_utf8($1);
2599                         $co{'author_epoch'} = $2;
2600                         $co{'author_tz'} = $3;
2601                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2602                                 $co{'author_name'}  = $1;
2603                                 $co{'author_email'} = $2;
2604                         } else {
2605                                 $co{'author_name'} = $co{'author'};
2606                         }
2607                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2608                         $co{'committer'} = to_utf8($1);
2609                         $co{'committer_epoch'} = $2;
2610                         $co{'committer_tz'} = $3;
2611                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2612                                 $co{'committer_name'}  = $1;
2613                                 $co{'committer_email'} = $2;
2614                         } else {
2615                                 $co{'committer_name'} = $co{'committer'};
2616                         }
2617                 }
2618         }
2619         if (!defined $co{'tree'}) {
2620                 return;
2621         };
2622         $co{'parents'} = \@parents;
2623         $co{'parent'} = $parents[0];
2624
2625         foreach my $title (@commit_lines) {
2626                 $title =~ s/^    //;
2627                 if ($title ne "") {
2628                         $co{'title'} = chop_str($title, 80, 5);
2629                         # remove leading stuff of merges to make the interesting part visible
2630                         if (length($title) > 50) {
2631                                 $title =~ s/^Automatic //;
2632                                 $title =~ s/^merge (of|with) /Merge ... /i;
2633                                 if (length($title) > 50) {
2634                                         $title =~ s/(http|rsync):\/\///;
2635                                 }
2636                                 if (length($title) > 50) {
2637                                         $title =~ s/(master|www|rsync)\.//;
2638                                 }
2639                                 if (length($title) > 50) {
2640                                         $title =~ s/kernel.org:?//;
2641                                 }
2642                                 if (length($title) > 50) {
2643                                         $title =~ s/\/pub\/scm//;
2644                                 }
2645                         }
2646                         $co{'title_short'} = chop_str($title, 50, 5);
2647                         last;
2648                 }
2649         }
2650         if (! defined $co{'title'} || $co{'title'} eq "") {
2651                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2652         }
2653         # remove added spaces
2654         foreach my $line (@commit_lines) {
2655                 $line =~ s/^    //;
2656         }
2657         $co{'comment'} = \@commit_lines;
2658
2659         my $age = time - $co{'committer_epoch'};
2660         $co{'age'} = $age;
2661         $co{'age_string'} = age_string($age);
2662         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2663         if ($age > 60*60*24*7*2) {
2664                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2665                 $co{'age_string_age'} = $co{'age_string'};
2666         } else {
2667                 $co{'age_string_date'} = $co{'age_string'};
2668                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2669         }
2670         return %co;
2671 }
2672
2673 sub parse_commit {
2674         my ($commit_id) = @_;
2675         my %co;
2676
2677         local $/ = "\0";
2678
2679         open my $fd, "-|", git_cmd(), "rev-list",
2680                 "--parents",
2681                 "--header",
2682                 "--max-count=1",
2683                 $commit_id,
2684                 "--",
2685                 or die_error(500, "Open git-rev-list failed");
2686         %co = parse_commit_text(<$fd>, 1);
2687         close $fd;
2688
2689         return %co;
2690 }
2691
2692 sub parse_commits {
2693         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2694         my @cos;
2695
2696         $maxcount ||= 1;
2697         $skip ||= 0;
2698
2699         local $/ = "\0";
2700
2701         open my $fd, "-|", git_cmd(), "rev-list",
2702                 "--header",
2703                 @args,
2704                 ("--max-count=" . $maxcount),
2705                 ("--skip=" . $skip),
2706                 @extra_options,
2707                 $commit_id,
2708                 "--",
2709                 ($filename ? ($filename) : ())
2710                 or die_error(500, "Open git-rev-list failed");
2711         while (my $line = <$fd>) {
2712                 my %co = parse_commit_text($line);
2713                 push @cos, \%co;
2714         }
2715         close $fd;
2716
2717         return wantarray ? @cos : \@cos;
2718 }
2719
2720 # parse line of git-diff-tree "raw" output
2721 sub parse_difftree_raw_line {
2722         my $line = shift;
2723         my %res;
2724
2725         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2726         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2727         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2728                 $res{'from_mode'} = $1;
2729                 $res{'to_mode'} = $2;
2730                 $res{'from_id'} = $3;
2731                 $res{'to_id'} = $4;
2732                 $res{'status'} = $5;
2733                 $res{'similarity'} = $6;
2734                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2735                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2736                 } else {
2737                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2738                 }
2739         }
2740         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2741         # combined diff (for merge commit)
2742         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2743                 $res{'nparents'}  = length($1);
2744                 $res{'from_mode'} = [ split(' ', $2) ];
2745                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2746                 $res{'from_id'} = [ split(' ', $3) ];
2747                 $res{'to_id'} = pop @{$res{'from_id'}};
2748                 $res{'status'} = [ split('', $4) ];
2749                 $res{'to_file'} = unquote($5);
2750         }
2751         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2752         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2753                 $res{'commit'} = $1;
2754         }
2755
2756         return wantarray ? %res : \%res;
2757 }
2758
2759 # wrapper: return parsed line of git-diff-tree "raw" output
2760 # (the argument might be raw line, or parsed info)
2761 sub parsed_difftree_line {
2762         my $line_or_ref = shift;
2763
2764         if (ref($line_or_ref) eq "HASH") {
2765                 # pre-parsed (or generated by hand)
2766                 return $line_or_ref;
2767         } else {
2768                 return parse_difftree_raw_line($line_or_ref);
2769         }
2770 }
2771
2772 # parse line of git-ls-tree output
2773 sub parse_ls_tree_line {
2774         my $line = shift;
2775         my %opts = @_;
2776         my %res;
2777
2778         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2779         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2780
2781         $res{'mode'} = $1;
2782         $res{'type'} = $2;
2783         $res{'hash'} = $3;
2784         if ($opts{'-z'}) {
2785                 $res{'name'} = $4;
2786         } else {
2787                 $res{'name'} = unquote($4);
2788         }
2789
2790         return wantarray ? %res : \%res;
2791 }
2792
2793 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2794 sub parse_from_to_diffinfo {
2795         my ($diffinfo, $from, $to, @parents) = @_;
2796
2797         if ($diffinfo->{'nparents'}) {
2798                 # combined diff
2799                 $from->{'file'} = [];
2800                 $from->{'href'} = [];
2801                 fill_from_file_info($diffinfo, @parents)
2802                         unless exists $diffinfo->{'from_file'};
2803                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2804                         $from->{'file'}[$i] =
2805                                 defined $diffinfo->{'from_file'}[$i] ?
2806                                         $diffinfo->{'from_file'}[$i] :
2807                                         $diffinfo->{'to_file'};
2808                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2809                                 $from->{'href'}[$i] = href(action=>"blob",
2810                                                            hash_base=>$parents[$i],
2811                                                            hash=>$diffinfo->{'from_id'}[$i],
2812                                                            file_name=>$from->{'file'}[$i]);
2813                         } else {
2814                                 $from->{'href'}[$i] = undef;
2815                         }
2816                 }
2817         } else {
2818                 # ordinary (not combined) diff
2819                 $from->{'file'} = $diffinfo->{'from_file'};
2820                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2821                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2822                                                hash=>$diffinfo->{'from_id'},
2823                                                file_name=>$from->{'file'});
2824                 } else {
2825                         delete $from->{'href'};
2826                 }
2827         }
2828
2829         $to->{'file'} = $diffinfo->{'to_file'};
2830         if (!is_deleted($diffinfo)) { # file exists in result
2831                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2832                                      hash=>$diffinfo->{'to_id'},
2833                                      file_name=>$to->{'file'});
2834         } else {
2835                 delete $to->{'href'};
2836         }
2837 }
2838
2839 ## ......................................................................
2840 ## parse to array of hashes functions
2841
2842 sub git_get_heads_list {
2843         my $limit = shift;
2844         my @headslist;
2845
2846         open my $fd, '-|', git_cmd(), 'for-each-ref',
2847                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2848                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2849                 'refs/heads'
2850                 or return;
2851         while (my $line = <$fd>) {
2852                 my %ref_item;
2853
2854                 chomp $line;
2855                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2856                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2857                 my ($committer, $epoch, $tz) =
2858                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2859                 $ref_item{'fullname'}  = $name;
2860                 $name =~ s!^refs/heads/!!;
2861
2862                 $ref_item{'name'}  = $name;
2863                 $ref_item{'id'}    = $hash;
2864                 $ref_item{'title'} = $title || '(no commit message)';
2865                 $ref_item{'epoch'} = $epoch;
2866                 if ($epoch) {
2867                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2868                 } else {
2869                         $ref_item{'age'} = "unknown";
2870                 }
2871
2872                 push @headslist, \%ref_item;
2873         }
2874         close $fd;
2875
2876         return wantarray ? @headslist : \@headslist;
2877 }
2878
2879 sub git_get_tags_list {
2880         my $limit = shift;
2881         my @tagslist;
2882
2883         open my $fd, '-|', git_cmd(), 'for-each-ref',
2884                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2885                 '--format=%(objectname) %(objecttype) %(refname) '.
2886                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2887                 'refs/tags'
2888                 or return;
2889         while (my $line = <$fd>) {
2890                 my %ref_item;
2891
2892                 chomp $line;
2893                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2894                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2895                 my ($creator, $epoch, $tz) =
2896                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2897                 $ref_item{'fullname'} = $name;
2898                 $name =~ s!^refs/tags/!!;
2899
2900                 $ref_item{'type'} = $type;
2901                 $ref_item{'id'} = $id;
2902                 $ref_item{'name'} = $name;
2903                 if ($type eq "tag") {
2904                         $ref_item{'subject'} = $title;
2905                         $ref_item{'reftype'} = $reftype;
2906                         $ref_item{'refid'}   = $refid;
2907                 } else {
2908                         $ref_item{'reftype'} = $type;
2909                         $ref_item{'refid'}   = $id;
2910                 }
2911
2912                 if ($type eq "tag" || $type eq "commit") {
2913                         $ref_item{'epoch'} = $epoch;
2914                         if ($epoch) {
2915                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2916                         } else {
2917                                 $ref_item{'age'} = "unknown";
2918                         }
2919                 }
2920
2921                 push @tagslist, \%ref_item;
2922         }
2923         close $fd;
2924
2925         return wantarray ? @tagslist : \@tagslist;
2926 }
2927
2928 ## ----------------------------------------------------------------------
2929 ## filesystem-related functions
2930
2931 sub get_file_owner {
2932         my $path = shift;
2933
2934         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2935         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2936         if (!defined $gcos) {
2937                 return undef;
2938         }
2939         my $owner = $gcos;
2940         $owner =~ s/[,;].*$//;
2941         return to_utf8($owner);
2942 }
2943
2944 # assume that file exists
2945 sub insert_file {
2946         my $filename = shift;
2947
2948         open my $fd, '<', $filename;
2949         print map { to_utf8($_) } <$fd>;
2950         close $fd;
2951 }
2952
2953 ## ......................................................................
2954 ## mimetype related functions
2955
2956 sub mimetype_guess_file {
2957         my $filename = shift;
2958         my $mimemap = shift;
2959         -r $mimemap or return undef;
2960
2961         my %mimemap;
2962         open(my $mh, '<', $mimemap) or return undef;
2963         while (<$mh>) {
2964                 next if m/^#/; # skip comments
2965                 my ($mimetype, $exts) = split(/\t+/);
2966                 if (defined $exts) {
2967                         my @exts = split(/\s+/, $exts);
2968                         foreach my $ext (@exts) {
2969                                 $mimemap{$ext} = $mimetype;
2970                         }
2971                 }
2972         }
2973         close($mh);
2974
2975         $filename =~ /\.([^.]*)$/;
2976         return $mimemap{$1};
2977 }
2978
2979 sub mimetype_guess {
2980         my $filename = shift;
2981         my $mime;
2982         $filename =~ /\./ or return undef;
2983
2984         if ($mimetypes_file) {
2985                 my $file = $mimetypes_file;
2986                 if ($file !~ m!^/!) { # if it is relative path
2987                         # it is relative to project
2988                         $file = "$projectroot/$project/$file";
2989                 }
2990                 $mime = mimetype_guess_file($filename, $file);
2991         }
2992         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2993         return $mime;
2994 }
2995
2996 sub blob_mimetype {
2997         my $fd = shift;
2998         my $filename = shift;
2999
3000         if ($filename) {
3001                 my $mime = mimetype_guess($filename);
3002                 $mime and return $mime;
3003         }
3004
3005         # just in case
3006         return $default_blob_plain_mimetype unless $fd;
3007
3008         if (-T $fd) {
3009                 return 'text/plain';
3010         } elsif (! $filename) {
3011                 return 'application/octet-stream';
3012         } elsif ($filename =~ m/\.png$/i) {
3013                 return 'image/png';
3014         } elsif ($filename =~ m/\.gif$/i) {
3015                 return 'image/gif';
3016         } elsif ($filename =~ m/\.jpe?g$/i) {
3017                 return 'image/jpeg';
3018         } else {
3019                 return 'application/octet-stream';
3020         }
3021 }
3022
3023 sub blob_contenttype {
3024         my ($fd, $file_name, $type) = @_;
3025
3026         $type ||= blob_mimetype($fd, $file_name);
3027         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3028                 $type .= "; charset=$default_text_plain_charset";
3029         }
3030
3031         return $type;
3032 }
3033
3034 ## ======================================================================
3035 ## functions printing HTML: header, footer, error page
3036
3037 sub git_header_html {
3038         my $status = shift || "200 OK";
3039         my $expires = shift;
3040
3041         my $title = "$site_name";
3042         if (defined $project) {
3043                 $title .= " - " . to_utf8($project);
3044                 if (defined $action) {
3045                         $title .= "/$action";
3046                         if (defined $file_name) {
3047                                 $title .= " - " . esc_path($file_name);
3048                                 if ($action eq "tree" && $file_name !~ m|/$|) {
3049                                         $title .= "/";
3050                                 }
3051                         }
3052                 }
3053         }
3054         my $content_type;
3055         # require explicit support from the UA if we are to send the page as
3056         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3057         # we have to do this because MSIE sometimes globs '*/*', pretending to
3058         # support xhtml+xml but choking when it gets what it asked for.
3059         if (defined $cgi->http('HTTP_ACCEPT') &&
3060             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3061             $cgi->Accept('application/xhtml+xml') != 0) {
3062                 $content_type = 'application/xhtml+xml';
3063         } else {
3064                 $content_type = 'text/html';
3065         }
3066         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3067                            -status=> $status, -expires => $expires);
3068         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3069         print <<EOF;
3070 <?xml version="1.0" encoding="utf-8"?>
3071 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3072 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3073 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3074 <!-- git core binaries version $git_version -->
3075 <head>
3076 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3077 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3078 <meta name="robots" content="index, nofollow"/>
3079 <title>$title</title>
3080 EOF
3081         # the stylesheet, favicon etc urls won't work correctly with path_info
3082         # unless we set the appropriate base URL
3083         if ($ENV{'PATH_INFO'}) {
3084                 print "<base href=\"".esc_url($base_url)."\" />\n";
3085         }
3086         # print out each stylesheet that exist, providing backwards capability
3087         # for those people who defined $stylesheet in a config file
3088         if (defined $stylesheet) {
3089                 print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3090         } else {
3091                 foreach my $stylesheet (@stylesheets) {
3092                         next unless $stylesheet;
3093                         print '<link rel="stylesheet" type="text/css" href="'.$stylesheet.'"/>'."\n";
3094                 }
3095         }
3096         if (defined $project) {
3097                 my %href_params = get_feed_info();
3098                 if (!exists $href_params{'-title'}) {
3099                         $href_params{'-title'} = 'log';
3100                 }
3101
3102                 foreach my $format qw(RSS Atom) {
3103                         my $type = lc($format);
3104                         my %link_attr = (
3105                                 '-rel' => 'alternate',
3106                                 '-title' => "$project - $href_params{'-title'} - $format feed",
3107                                 '-type' => "application/$type+xml"
3108                         );
3109
3110                         $href_params{'action'} = $type;
3111                         $link_attr{'-href'} = href(%href_params);
3112                         print "<link ".
3113                               "rel=\"$link_attr{'-rel'}\" ".
3114                               "title=\"$link_attr{'-title'}\" ".
3115                               "href=\"$link_attr{'-href'}\" ".
3116                               "type=\"$link_attr{'-type'}\" ".
3117                               "/>\n";
3118
3119                         $href_params{'extra_options'} = '--no-merges';
3120                         $link_attr{'-href'} = href(%href_params);
3121                         $link_attr{'-title'} .= ' (no merges)';
3122                         print "<link ".
3123                               "rel=\"$link_attr{'-rel'}\" ".
3124                               "title=\"$link_attr{'-title'}\" ".
3125                               "href=\"$link_attr{'-href'}\" ".
3126                               "type=\"$link_attr{'-type'}\" ".
3127                               "/>\n";
3128                 }
3129
3130         } else {
3131                 printf('<link rel="alternate" title="%s projects list" '.
3132                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3133                        $site_name, href(project=>undef, action=>"project_index"));
3134                 printf('<link rel="alternate" title="%s projects feeds" '.
3135                        'href="%s" type="text/x-opml" />'."\n",
3136                        $site_name, href(project=>undef, action=>"opml"));
3137         }
3138         if (defined $favicon) {
3139                 print qq(<link rel="shortcut icon" href="$favicon" type="image/png" />\n);
3140         }
3141
3142         print "</head>\n" .
3143               "<body>\n";
3144
3145         if (-f $site_header) {
3146                 insert_file($site_header);
3147         }
3148
3149         print "<div class=\"page_header\">\n" .
3150               $cgi->a({-href => esc_url($logo_url),
3151                        -title => $logo_label},
3152                       qq(<img src="$logo" width="72" height="27" alt="git" class="logo"/>));
3153         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3154         if (defined $project) {
3155                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3156                 if (defined $action) {
3157                         print " / $action";
3158                 }
3159                 print "\n";
3160         }
3161         print "</div>\n";
3162
3163         my $have_search = gitweb_check_feature('search');
3164         if (defined $project && $have_search) {
3165                 if (!defined $searchtext) {
3166                         $searchtext = "";
3167                 }
3168                 my $search_hash;
3169                 if (defined $hash_base) {
3170                         $search_hash = $hash_base;
3171                 } elsif (defined $hash) {
3172                         $search_hash = $hash;
3173                 } else {
3174                         $search_hash = "HEAD";
3175                 }
3176                 my $action = $my_uri;
3177                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3178                 if ($use_pathinfo) {
3179                         $action .= "/".esc_url($project);
3180                 }
3181                 print $cgi->startform(-method => "get", -action => $action) .
3182                       "<div class=\"search\">\n" .
3183                       (!$use_pathinfo &&
3184                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3185                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3186                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3187                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3188                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3189                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3190                       " search:\n",
3191                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3192                       "<span title=\"Extended regular expression\">" .
3193                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3194                                      -checked => $search_use_regexp) .
3195                       "</span>" .
3196                       "</div>" .
3197                       $cgi->end_form() . "\n";
3198         }
3199 }
3200
3201 sub git_footer_html {
3202         my $feed_class = 'rss_logo';
3203
3204         print "<div class=\"page_footer\">\n";
3205         if (defined $project) {
3206                 my $descr = git_get_project_description($project);
3207                 if (defined $descr) {
3208                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3209                 }
3210
3211                 my %href_params = get_feed_info();
3212                 if (!%href_params) {
3213                         $feed_class .= ' generic';
3214                 }
3215                 $href_params{'-title'} ||= 'log';
3216
3217                 foreach my $format qw(RSS Atom) {
3218                         $href_params{'action'} = lc($format);
3219                         print $cgi->a({-href => href(%href_params),
3220                                       -title => "$href_params{'-title'} $format feed",
3221                                       -class => $feed_class}, $format)."\n";
3222                 }
3223
3224         } else {
3225                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3226                               -class => $feed_class}, "OPML") . " ";
3227                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3228                               -class => $feed_class}, "TXT") . "\n";
3229         }
3230         print "</div>\n"; # class="page_footer"
3231
3232         if (-f $site_footer) {
3233                 insert_file($site_footer);
3234         }
3235
3236         print "</body>\n" .
3237               "</html>";
3238 }
3239
3240 # die_error(<http_status_code>, <error_message>)
3241 # Example: die_error(404, 'Hash not found')
3242 # By convention, use the following status codes (as defined in RFC 2616):
3243 # 400: Invalid or missing CGI parameters, or
3244 #      requested object exists but has wrong type.
3245 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3246 #      this server or project.
3247 # 404: Requested object/revision/project doesn't exist.
3248 # 500: The server isn't configured properly, or
3249 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3250 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3251 sub die_error {
3252         my $status = shift || 500;
3253         my $error = shift || "Internal server error";
3254
3255         my %http_responses = (400 => '400 Bad Request',
3256                               403 => '403 Forbidden',
3257                               404 => '404 Not Found',
3258                               500 => '500 Internal Server Error');
3259         git_header_html($http_responses{$status});
3260         print <<EOF;
3261 <div class="page_body">
3262 <br /><br />
3263 $status - $error
3264 <br />
3265 </div>
3266 EOF
3267         git_footer_html();
3268         exit;
3269 }
3270
3271 ## ----------------------------------------------------------------------
3272 ## functions printing or outputting HTML: navigation
3273
3274 sub git_print_page_nav {
3275         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3276         $extra = '' if !defined $extra; # pager or formats
3277
3278         my @navs = qw(summary shortlog log commit commitdiff tree);
3279         if ($suppress) {
3280                 @navs = grep { $_ ne $suppress } @navs;
3281         }
3282
3283         my %arg = map { $_ => {action=>$_} } @navs;
3284         if (defined $head) {
3285                 for (qw(commit commitdiff)) {
3286                         $arg{$_}{'hash'} = $head;
3287                 }
3288                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3289                         for (qw(shortlog log)) {
3290                                 $arg{$_}{'hash'} = $head;
3291                         }
3292                 }
3293         }
3294
3295         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3296         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3297
3298         my @actions = gitweb_get_feature('actions');
3299         my %repl = (
3300                 '%' => '%',
3301                 'n' => $project,         # project name
3302                 'f' => $git_dir,         # project path within filesystem
3303                 'h' => $treehead || '',  # current hash ('h' parameter)
3304                 'b' => $treebase || '',  # hash base ('hb' parameter)
3305         );
3306         while (@actions) {
3307                 my ($label, $link, $pos) = splice(@actions,0,3);
3308                 # insert
3309                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3310                 # munch munch
3311                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3312                 $arg{$label}{'_href'} = $link;
3313         }
3314
3315         print "<div class=\"page_nav\">\n" .
3316                 (join " | ",
3317                  map { $_ eq $current ?
3318                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3319                  } @navs);
3320         print "<br/>\n$extra<br/>\n" .
3321               "</div>\n";
3322 }
3323
3324 sub format_paging_nav {
3325         my ($action, $hash, $head, $page, $has_next_link) = @_;
3326         my $paging_nav;
3327
3328
3329         if ($hash ne $head || $page) {
3330                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3331         } else {
3332                 $paging_nav .= "HEAD";
3333         }
3334
3335         if ($page > 0) {
3336                 $paging_nav .= " &sdot; " .
3337                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3338                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3339         } else {
3340                 $paging_nav .= " &sdot; prev";
3341         }
3342
3343         if ($has_next_link) {
3344                 $paging_nav .= " &sdot; " .
3345                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3346                                  -accesskey => "n", -title => "Alt-n"}, "next");
3347         } else {
3348                 $paging_nav .= " &sdot; next";
3349         }
3350
3351         return $paging_nav;
3352 }
3353
3354 ## ......................................................................
3355 ## functions printing or outputting HTML: div
3356
3357 sub git_print_header_div {
3358         my ($action, $title, $hash, $hash_base) = @_;
3359         my %args = ();
3360
3361         $args{'action'} = $action;
3362         $args{'hash'} = $hash if $hash;
3363         $args{'hash_base'} = $hash_base if $hash_base;
3364
3365         print "<div class=\"header\">\n" .
3366               $cgi->a({-href => href(%args), -class => "title"},
3367               $title ? $title : $action) .
3368               "\n</div>\n";
3369 }
3370
3371 sub print_local_time {
3372         my %date = @_;
3373         if ($date{'hour_local'} < 6) {
3374                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3375                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3376         } else {
3377                 printf(" (%02d:%02d %s)",
3378                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3379         }
3380 }
3381
3382 # Outputs the author name and date in long form
3383 sub git_print_authorship {
3384         my $co = shift;
3385         my %opts = @_;
3386         my $tag = $opts{-tag} || 'div';
3387
3388         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3389         print "<$tag class=\"author_date\">" .
3390               esc_html($co->{'author_name'}) .
3391               " [$ad{'rfc2822'}";
3392         print_local_time(%ad) if ($opts{-localtime});
3393         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3394                   . "</$tag>\n";
3395 }
3396
3397 # Outputs table rows containing the full author or committer information,
3398 # in the format expected for 'commit' view (& similia).
3399 # Parameters are a commit hash reference, followed by the list of people
3400 # to output information for. If the list is empty it defalts to both
3401 # author and committer.
3402 sub git_print_authorship_rows {
3403         my $co = shift;
3404         # too bad we can't use @people = @_ || ('author', 'committer')
3405         my @people = @_;
3406         @people = ('author', 'committer') unless @people;
3407         foreach my $who (@people) {
3408                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3409                 print "<tr><td>$who</td><td>" . esc_html($co->{$who}) . "</td>" .
3410                       "<td rowspan=\"2\">" .
3411                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3412                       "</td></tr>\n" .
3413                       "<tr>" .
3414                       "<td></td><td> $wd{'rfc2822'}";
3415                 print_local_time(%wd);
3416                 print "</td>" .
3417                       "</tr>\n";
3418         }
3419 }
3420
3421 sub git_print_page_path {
3422         my $name = shift;
3423         my $type = shift;
3424         my $hb = shift;
3425
3426
3427         print "<div class=\"page_path\">";
3428         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3429                       -title => 'tree root'}, to_utf8("[$project]"));
3430         print " / ";
3431         if (defined $name) {
3432                 my @dirname = split '/', $name;
3433                 my $basename = pop @dirname;
3434                 my $fullname = '';
3435
3436                 foreach my $dir (@dirname) {
3437                         $fullname .= ($fullname ? '/' : '') . $dir;
3438                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3439                                                      hash_base=>$hb),
3440                                       -title => $fullname}, esc_path($dir));
3441                         print " / ";
3442                 }
3443                 if (defined $type && $type eq 'blob') {
3444                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3445                                                      hash_base=>$hb),
3446                                       -title => $name}, esc_path($basename));
3447                 } elsif (defined $type && $type eq 'tree') {
3448                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3449                                                      hash_base=>$hb),
3450                                       -title => $name}, esc_path($basename));
3451                         print " / ";
3452                 } else {
3453                         print esc_path($basename);
3454                 }
3455         }
3456         print "<br/></div>\n";
3457 }
3458
3459 sub git_print_log {
3460         my $log = shift;
3461         my %opts = @_;
3462
3463         if ($opts{'-remove_title'}) {
3464                 # remove title, i.e. first line of log
3465                 shift @$log;
3466         }
3467         # remove leading empty lines
3468         while (defined $log->[0] && $log->[0] eq "") {
3469                 shift @$log;
3470         }
3471
3472         # print log
3473         my $signoff = 0;
3474         my $empty = 0;
3475         foreach my $line (@$log) {
3476                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3477                         $signoff = 1;
3478                         $empty = 0;
3479                         if (! $opts{'-remove_signoff'}) {
3480                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3481                                 next;
3482                         } else {
3483                                 # remove signoff lines
3484                                 next;
3485                         }
3486                 } else {
3487                         $signoff = 0;
3488                 }
3489
3490                 # print only one empty line
3491                 # do not print empty line after signoff
3492                 if ($line eq "") {
3493                         next if ($empty || $signoff);
3494                         $empty = 1;
3495                 } else {
3496                         $empty = 0;
3497                 }
3498
3499                 print format_log_line_html($line) . "<br/>\n";
3500         }
3501
3502         if ($opts{'-final_empty_line'}) {
3503                 # end with single empty line
3504                 print "<br/>\n" unless $empty;
3505         }
3506 }
3507
3508 # return link target (what link points to)
3509 sub git_get_link_target {
3510         my $hash = shift;
3511         my $link_target;
3512
3513         # read link
3514         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3515                 or return;
3516         {
3517                 local $/ = undef;
3518                 $link_target = <$fd>;
3519         }
3520         close $fd
3521                 or return;
3522
3523         return $link_target;
3524 }
3525
3526 # given link target, and the directory (basedir) the link is in,
3527 # return target of link relative to top directory (top tree);
3528 # return undef if it is not possible (including absolute links).
3529 sub normalize_link_target {
3530         my ($link_target, $basedir) = @_;
3531
3532         # absolute symlinks (beginning with '/') cannot be normalized
3533         return if (substr($link_target, 0, 1) eq '/');
3534
3535         # normalize link target to path from top (root) tree (dir)
3536         my $path;
3537         if ($basedir) {
3538                 $path = $basedir . '/' . $link_target;
3539         } else {
3540                 # we are in top (root) tree (dir)
3541                 $path = $link_target;
3542         }
3543
3544         # remove //, /./, and /../
3545         my @path_parts;
3546         foreach my $part (split('/', $path)) {
3547                 # discard '.' and ''
3548                 next if (!$part || $part eq '.');
3549                 # handle '..'
3550                 if ($part eq '..') {
3551                         if (@path_parts) {
3552                                 pop @path_parts;
3553                         } else {
3554                                 # link leads outside repository (outside top dir)
3555                                 return;
3556                         }
3557                 } else {
3558                         push @path_parts, $part;
3559                 }
3560         }
3561         $path = join('/', @path_parts);
3562
3563         return $path;
3564 }
3565
3566 # print tree entry (row of git_tree), but without encompassing <tr> element
3567 sub git_print_tree_entry {
3568         my ($t, $basedir, $hash_base, $have_blame) = @_;
3569
3570         my %base_key = ();
3571         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3572
3573         # The format of a table row is: mode list link.  Where mode is
3574         # the mode of the entry, list is the name of the entry, an href,
3575         # and link is the action links of the entry.
3576
3577         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3578         if ($t->{'type'} eq "blob") {
3579                 print "<td class=\"list\">" .
3580                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3581                                                file_name=>"$basedir$t->{'name'}", %base_key),
3582                                 -class => "list"}, esc_path($t->{'name'}));
3583                 if (S_ISLNK(oct $t->{'mode'})) {
3584                         my $link_target = git_get_link_target($t->{'hash'});
3585                         if ($link_target) {
3586                                 my $norm_target = normalize_link_target($link_target, $basedir);
3587                                 if (defined $norm_target) {
3588                                         print " -> " .
3589                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3590                                                                      file_name=>$norm_target),
3591                                                        -title => $norm_target}, esc_path($link_target));
3592                                 } else {
3593                                         print " -> " . esc_path($link_target);
3594                                 }
3595                         }
3596                 }
3597                 print "</td>\n";
3598                 print "<td class=\"link\">";
3599                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3600                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3601                               "blob");
3602                 if ($have_blame) {
3603                         print " | " .
3604                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3605                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3606                                       "blame");
3607                 }
3608                 if (defined $hash_base) {
3609                         print " | " .
3610                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3611                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3612                                       "history");
3613                 }
3614                 print " | " .
3615                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3616                                                file_name=>"$basedir$t->{'name'}")},
3617                                 "raw");
3618                 print "</td>\n";
3619
3620         } elsif ($t->{'type'} eq "tree") {
3621                 print "<td class=\"list\">";
3622                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3623                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3624                               esc_path($t->{'name'}));
3625                 print "</td>\n";
3626                 print "<td class=\"link\">";
3627                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3628                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3629                               "tree");
3630                 if (defined $hash_base) {
3631                         print " | " .
3632                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3633                                                      file_name=>"$basedir$t->{'name'}")},
3634                                       "history");
3635                 }
3636                 print "</td>\n";
3637         } else {
3638                 # unknown object: we can only present history for it
3639                 # (this includes 'commit' object, i.e. submodule support)
3640                 print "<td class=\"list\">" .
3641                       esc_path($t->{'name'}) .
3642                       "</td>\n";
3643                 print "<td class=\"link\">";
3644                 if (defined $hash_base) {
3645                         print $cgi->a({-href => href(action=>"history",
3646                                                      hash_base=>$hash_base,
3647                                                      file_name=>"$basedir$t->{'name'}")},
3648                                       "history");
3649                 }
3650                 print "</td>\n";
3651         }
3652 }
3653
3654 ## ......................................................................
3655 ## functions printing large fragments of HTML
3656
3657 # get pre-image filenames for merge (combined) diff
3658 sub fill_from_file_info {
3659         my ($diff, @parents) = @_;
3660
3661         $diff->{'from_file'} = [ ];
3662         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3663         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3664                 if ($diff->{'status'}[$i] eq 'R' ||
3665                     $diff->{'status'}[$i] eq 'C') {
3666                         $diff->{'from_file'}[$i] =
3667                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3668                 }
3669         }
3670
3671         return $diff;
3672 }
3673
3674 # is current raw difftree line of file deletion
3675 sub is_deleted {
3676         my $diffinfo = shift;
3677
3678         return $diffinfo->{'to_id'} eq ('0' x 40);
3679 }
3680
3681 # does patch correspond to [previous] difftree raw line
3682 # $diffinfo  - hashref of parsed raw diff format
3683 # $patchinfo - hashref of parsed patch diff format
3684 #              (the same keys as in $diffinfo)
3685 sub is_patch_split {
3686         my ($diffinfo, $patchinfo) = @_;
3687
3688         return defined $diffinfo && defined $patchinfo
3689                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3690 }
3691
3692
3693 sub git_difftree_body {
3694         my ($difftree, $hash, @parents) = @_;
3695         my ($parent) = $parents[0];
3696         my $have_blame = gitweb_check_feature('blame');
3697         print "<div class=\"list_head\">\n";
3698         if ($#{$difftree} > 10) {
3699                 print(($#{$difftree} + 1) . " files changed:\n");
3700         }
3701         print "</div>\n";
3702
3703         print "<table class=\"" .
3704               (@parents > 1 ? "combined " : "") .
3705               "diff_tree\">\n";
3706
3707         # header only for combined diff in 'commitdiff' view
3708         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3709         if ($has_header) {
3710                 # table header
3711                 print "<thead><tr>\n" .
3712                        "<th></th><th></th>\n"; # filename, patchN link
3713                 for (my $i = 0; $i < @parents; $i++) {
3714                         my $par = $parents[$i];
3715                         print "<th>" .
3716                               $cgi->a({-href => href(action=>"commitdiff",
3717                                                      hash=>$hash, hash_parent=>$par),
3718                                        -title => 'commitdiff to parent number ' .
3719                                                   ($i+1) . ': ' . substr($par,0,7)},
3720                                       $i+1) .
3721                               "&nbsp;</th>\n";
3722                 }
3723                 print "</tr></thead>\n<tbody>\n";
3724         }
3725
3726         my $alternate = 1;
3727         my $patchno = 0;
3728         foreach my $line (@{$difftree}) {
3729                 my $diff = parsed_difftree_line($line);
3730
3731                 if ($alternate) {
3732                         print "<tr class=\"dark\">\n";
3733                 } else {
3734                         print "<tr class=\"light\">\n";
3735                 }
3736                 $alternate ^= 1;
3737
3738                 if (exists $diff->{'nparents'}) { # combined diff
3739
3740                         fill_from_file_info($diff, @parents)
3741                                 unless exists $diff->{'from_file'};
3742
3743                         if (!is_deleted($diff)) {
3744                                 # file exists in the result (child) commit
3745                                 print "<td>" .
3746                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3747                                                              file_name=>$diff->{'to_file'},
3748                                                              hash_base=>$hash),
3749                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3750                                       "</td>\n";
3751                         } else {
3752                                 print "<td>" .
3753                                       esc_path($diff->{'to_file'}) .
3754                                       "</td>\n";
3755                         }
3756
3757                         if ($action eq 'commitdiff') {
3758                                 # link to patch
3759                                 $patchno++;
3760                                 print "<td class=\"link\">" .
3761                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3762                                       " | " .
3763                                       "</td>\n";
3764                         }
3765
3766                         my $has_history = 0;
3767                         my $not_deleted = 0;
3768                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3769                                 my $hash_parent = $parents[$i];
3770                                 my $from_hash = $diff->{'from_id'}[$i];
3771                                 my $from_path = $diff->{'from_file'}[$i];
3772                                 my $status = $diff->{'status'}[$i];
3773
3774                                 $has_history ||= ($status ne 'A');
3775                                 $not_deleted ||= ($status ne 'D');
3776
3777                                 if ($status eq 'A') {
3778                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3779                                 } elsif ($status eq 'D') {
3780                                         print "<td class=\"link\">" .
3781                                               $cgi->a({-href => href(action=>"blob",
3782                                                                      hash_base=>$hash,
3783                                                                      hash=>$from_hash,
3784                                                                      file_name=>$from_path)},
3785                                                       "blob" . ($i+1)) .
3786                                               " | </td>\n";
3787                                 } else {
3788                                         if ($diff->{'to_id'} eq $from_hash) {
3789                                                 print "<td class=\"link nochange\">";
3790                                         } else {
3791                                                 print "<td class=\"link\">";
3792                                         }
3793                                         print $cgi->a({-href => href(action=>"blobdiff",
3794                                                                      hash=>$diff->{'to_id'},
3795                                                                      hash_parent=>$from_hash,
3796                                                                      hash_base=>$hash,
3797                                                                      hash_parent_base=>$hash_parent,
3798                                                                      file_name=>$diff->{'to_file'},
3799                                                                      file_parent=>$from_path)},
3800                                                       "diff" . ($i+1)) .
3801                                               " | </td>\n";
3802                                 }
3803                         }
3804
3805                         print "<td class=\"link\">";
3806                         if ($not_deleted) {
3807                                 print $cgi->a({-href => href(action=>"blob",
3808                                                              hash=>$diff->{'to_id'},
3809                                                              file_name=>$diff->{'to_file'},
3810                                                              hash_base=>$hash)},
3811                                               "blob");
3812                                 print " | " if ($has_history);
3813                         }
3814                         if ($has_history) {
3815                                 print $cgi->a({-href => href(action=>"history",
3816                                                              file_name=>$diff->{'to_file'},
3817                                                              hash_base=>$hash)},
3818                                               "history");
3819                         }
3820                         print "</td>\n";
3821
3822                         print "</tr>\n";
3823                         next; # instead of 'else' clause, to avoid extra indent
3824                 }
3825                 # else ordinary diff
3826
3827                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3828                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3829                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3830                         $to_mode_oct = oct $diff->{'to_mode'};
3831                         if (S_ISREG($to_mode_oct)) { # only for regular file
3832                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3833                         }
3834                         $to_file_type = file_type($diff->{'to_mode'});
3835                 }
3836                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3837                         $from_mode_oct = oct $diff->{'from_mode'};
3838                         if (S_ISREG($to_mode_oct)) { # only for regular file
3839                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3840                         }
3841                         $from_file_type = file_type($diff->{'from_mode'});
3842                 }
3843
3844                 if ($diff->{'status'} eq "A") { # created
3845                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3846                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3847                         $mode_chng   .= "]</span>";
3848                         print "<td>";
3849                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3850                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3851                                       -class => "list"}, esc_path($diff->{'file'}));
3852                         print "</td>\n";
3853                         print "<td>$mode_chng</td>\n";
3854                         print "<td class=\"link\">";
3855                         if ($action eq 'commitdiff') {
3856                                 # link to patch
3857                                 $patchno++;
3858                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3859                                 print " | ";
3860                         }
3861                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3862                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3863                                       "blob");
3864                         print "</td>\n";
3865
3866                 } elsif ($diff->{'status'} eq "D") { # deleted
3867                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3868                         print "<td>";
3869                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3870                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3871                                        -class => "list"}, esc_path($diff->{'file'}));
3872                         print "</td>\n";
3873                         print "<td>$mode_chng</td>\n";
3874                         print "<td class=\"link\">";
3875                         if ($action eq 'commitdiff') {
3876                                 # link to patch
3877                                 $patchno++;
3878                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3879                                 print " | ";
3880                         }
3881                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3882                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3883                                       "blob") . " | ";
3884                         if ($have_blame) {
3885                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3886                                                              file_name=>$diff->{'file'})},
3887                                               "blame") . " | ";
3888                         }
3889                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3890                                                      file_name=>$diff->{'file'})},
3891                                       "history");
3892                         print "</td>\n";
3893
3894                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3895                         my $mode_chnge = "";
3896                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3897                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3898                                 if ($from_file_type ne $to_file_type) {
3899                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3900                                 }
3901                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3902                                         if ($from_mode_str && $to_mode_str) {
3903                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3904                                         } elsif ($to_mode_str) {
3905                                                 $mode_chnge .= " mode: $to_mode_str";
3906                                         }
3907                                 }
3908                                 $mode_chnge .= "]</span>\n";
3909                         }
3910                         print "<td>";
3911                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3912                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3913                                       -class => "list"}, esc_path($diff->{'file'}));
3914                         print "</td>\n";
3915                         print "<td>$mode_chnge</td>\n";
3916                         print "<td class=\"link\">";
3917                         if ($action eq 'commitdiff') {
3918                                 # link to patch
3919                                 $patchno++;
3920                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3921                                       " | ";
3922                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3923                                 # "commit" view and modified file (not onlu mode changed)
3924                                 print $cgi->a({-href => href(action=>"blobdiff",
3925                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3926                                                              hash_base=>$hash, hash_parent_base=>$parent,
3927                                                              file_name=>$diff->{'file'})},
3928                                               "diff") .
3929                                       " | ";
3930                         }
3931                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3932                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3933                                        "blob") . " | ";
3934                         if ($have_blame) {
3935                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3936                                                              file_name=>$diff->{'file'})},
3937                                               "blame") . " | ";
3938                         }
3939                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3940                                                      file_name=>$diff->{'file'})},
3941                                       "history");
3942                         print "</td>\n";
3943
3944                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3945                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3946                         my $nstatus = $status_name{$diff->{'status'}};
3947                         my $mode_chng = "";
3948                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3949                                 # mode also for directories, so we cannot use $to_mode_str
3950                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3951                         }
3952                         print "<td>" .
3953                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3954                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3955                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3956                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3957                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3958                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3959                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3960                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3961                               "<td class=\"link\">";
3962                         if ($action eq 'commitdiff') {
3963                                 # link to patch
3964                                 $patchno++;
3965                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3966                                       " | ";
3967                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3968                                 # "commit" view and modified file (not only pure rename or copy)
3969                                 print $cgi->a({-href => href(action=>"blobdiff",
3970                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3971                                                              hash_base=>$hash, hash_parent_base=>$parent,
3972                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3973                                               "diff") .
3974                                       " | ";
3975                         }
3976                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3977                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3978                                       "blob") . " | ";
3979                         if ($have_blame) {
3980                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3981                                                              file_name=>$diff->{'to_file'})},
3982                                               "blame") . " | ";
3983                         }
3984                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3985                                                     file_name=>$diff->{'to_file'})},
3986                                       "history");
3987                         print "</td>\n";
3988
3989                 } # we should not encounter Unmerged (U) or Unknown (X) status
3990                 print "</tr>\n";
3991         }
3992         print "</tbody>" if $has_header;
3993         print "</table>\n";
3994 }
3995
3996 sub git_patchset_body {
3997         my ($fd, $difftree, $hash, @hash_parents) = @_;
3998         my ($hash_parent) = $hash_parents[0];
3999
4000         my $is_combined = (@hash_parents > 1);
4001         my $patch_idx = 0;
4002         my $patch_number = 0;
4003         my $patch_line;
4004         my $diffinfo;
4005         my $to_name;
4006         my (%from, %to);
4007
4008         print "<div class=\"patchset\">\n";
4009
4010         # skip to first patch
4011         while ($patch_line = <$fd>) {
4012                 chomp $patch_line;
4013
4014                 last if ($patch_line =~ m/^diff /);
4015         }
4016
4017  PATCH:
4018         while ($patch_line) {
4019
4020                 # parse "git diff" header line
4021                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4022                         # $1 is from_name, which we do not use
4023                         $to_name = unquote($2);
4024                         $to_name =~ s!^b/!!;
4025                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4026                         # $1 is 'cc' or 'combined', which we do not use
4027                         $to_name = unquote($2);
4028                 } else {
4029                         $to_name = undef;
4030                 }
4031
4032                 # check if current patch belong to current raw line
4033                 # and parse raw git-diff line if needed
4034                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4035                         # this is continuation of a split patch
4036                         print "<div class=\"patch cont\">\n";
4037                 } else {
4038                         # advance raw git-diff output if needed
4039                         $patch_idx++ if defined $diffinfo;
4040
4041                         # read and prepare patch information
4042                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4043
4044                         # compact combined diff output can have some patches skipped
4045                         # find which patch (using pathname of result) we are at now;
4046                         if ($is_combined) {
4047                                 while ($to_name ne $diffinfo->{'to_file'}) {
4048                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4049                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4050                                               "</div>\n";  # class="patch"
4051
4052                                         $patch_idx++;
4053                                         $patch_number++;
4054
4055                                         last if $patch_idx > $#$difftree;
4056                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4057                                 }
4058                         }
4059
4060                         # modifies %from, %to hashes
4061                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4062
4063                         # this is first patch for raw difftree line with $patch_idx index
4064                         # we index @$difftree array from 0, but number patches from 1
4065                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4066                 }
4067
4068                 # git diff header
4069                 #assert($patch_line =~ m/^diff /) if DEBUG;
4070                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4071                 $patch_number++;
4072                 # print "git diff" header
4073                 print format_git_diff_header_line($patch_line, $diffinfo,
4074                                                   \%from, \%to);
4075
4076                 # print extended diff header
4077                 print "<div class=\"diff extended_header\">\n";
4078         EXTENDED_HEADER:
4079                 while ($patch_line = <$fd>) {
4080                         chomp $patch_line;
4081
4082                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4083
4084                         print format_extended_diff_header_line($patch_line, $diffinfo,
4085                                                                \%from, \%to);
4086                 }
4087                 print "</div>\n"; # class="diff extended_header"
4088
4089                 # from-file/to-file diff header
4090                 if (! $patch_line) {
4091                         print "</div>\n"; # class="patch"
4092                         last PATCH;
4093                 }
4094                 next PATCH if ($patch_line =~ m/^diff /);
4095                 #assert($patch_line =~ m/^---/) if DEBUG;
4096
4097                 my $last_patch_line = $patch_line;
4098                 $patch_line = <$fd>;
4099                 chomp $patch_line;
4100                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4101
4102                 print format_diff_from_to_header($last_patch_line, $patch_line,
4103                                                  $diffinfo, \%from, \%to,
4104                                                  @hash_parents);
4105
4106                 # the patch itself
4107         LINE:
4108                 while ($patch_line = <$fd>) {
4109                         chomp $patch_line;
4110
4111                         next PATCH if ($patch_line =~ m/^diff /);
4112
4113                         print format_diff_line($patch_line, \%from, \%to);
4114                 }
4115
4116         } continue {
4117                 print "</div>\n"; # class="patch"
4118         }
4119
4120         # for compact combined (--cc) format, with chunk and patch simpliciaction
4121         # patchset might be empty, but there might be unprocessed raw lines
4122         for (++$patch_idx if $patch_number > 0;
4123              $patch_idx < @$difftree;
4124              ++$patch_idx) {
4125                 # read and prepare patch information
4126                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4127
4128                 # generate anchor for "patch" links in difftree / whatchanged part
4129                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4130                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4131                       "</div>\n";  # class="patch"
4132
4133                 $patch_number++;
4134         }
4135
4136         if ($patch_number == 0) {
4137                 if (@hash_parents > 1) {
4138                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4139                 } else {
4140                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4141                 }
4142         }
4143
4144         print "</div>\n"; # class="patchset"
4145 }
4146
4147 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4148
4149 # fills project list info (age, description, owner, forks) for each
4150 # project in the list, removing invalid projects from returned list
4151 # NOTE: modifies $projlist, but does not remove entries from it
4152 sub fill_project_list_info {
4153         my ($projlist, $check_forks) = @_;
4154         my @projects;
4155
4156         my $show_ctags = gitweb_check_feature('ctags');
4157  PROJECT:
4158         foreach my $pr (@$projlist) {
4159                 my (@activity) = git_get_last_activity($pr->{'path'});
4160                 unless (@activity) {
4161                         next PROJECT;
4162                 }
4163                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4164                 if (!defined $pr->{'descr'}) {
4165                         my $descr = git_get_project_description($pr->{'path'}) || "";
4166                         $descr = to_utf8($descr);
4167                         $pr->{'descr_long'} = $descr;
4168                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4169                 }
4170                 if (!defined $pr->{'owner'}) {
4171                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4172                 }
4173                 if ($check_forks) {
4174                         my $pname = $pr->{'path'};
4175                         if (($pname =~ s/\.git$//) &&
4176                             ($pname !~ /\/$/) &&
4177                             (-d "$projectroot/$pname")) {
4178                                 $pr->{'forks'} = "-d $projectroot/$pname";
4179                         } else {
4180                                 $pr->{'forks'} = 0;
4181                         }
4182                 }
4183                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4184                 push @projects, $pr;
4185         }
4186
4187         return @projects;
4188 }
4189
4190 # print 'sort by' <th> element, generating 'sort by $name' replay link
4191 # if that order is not selected
4192 sub print_sort_th {
4193         my ($name, $order, $header) = @_;
4194         $header ||= ucfirst($name);
4195
4196         if ($order eq $name) {
4197                 print "<th>$header</th>\n";
4198         } else {
4199                 print "<th>" .
4200                       $cgi->a({-href => href(-replay=>1, order=>$name),
4201                                -class => "header"}, $header) .
4202                       "</th>\n";
4203         }
4204 }
4205
4206 sub git_project_list_body {
4207         # actually uses global variable $project
4208         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4209
4210         my $check_forks = gitweb_check_feature('forks');
4211         my @projects = fill_project_list_info($projlist, $check_forks);
4212
4213         $order ||= $default_projects_order;
4214         $from = 0 unless defined $from;
4215         $to = $#projects if (!defined $to || $#projects < $to);
4216
4217         my %order_info = (
4218                 project => { key => 'path', type => 'str' },
4219                 descr => { key => 'descr_long', type => 'str' },
4220                 owner => { key => 'owner', type => 'str' },
4221                 age => { key => 'age', type => 'num' }
4222         );
4223         my $oi = $order_info{$order};
4224         if ($oi->{'type'} eq 'str') {
4225                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4226         } else {
4227                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4228         }
4229
4230         my $show_ctags = gitweb_check_feature('ctags');
4231         if ($show_ctags) {
4232                 my %ctags;
4233                 foreach my $p (@projects) {
4234                         foreach my $ct (keys %{$p->{'ctags'}}) {
4235                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4236                         }
4237                 }
4238                 my $cloud = git_populate_project_tagcloud(\%ctags);
4239                 print git_show_project_tagcloud($cloud, 64);
4240         }
4241
4242         print "<table class=\"project_list\">\n";
4243         unless ($no_header) {
4244                 print "<tr>\n";
4245                 if ($check_forks) {
4246                         print "<th></th>\n";
4247                 }
4248                 print_sort_th('project', $order, 'Project');
4249                 print_sort_th('descr', $order, 'Description');
4250                 print_sort_th('owner', $order, 'Owner');
4251                 print_sort_th('age', $order, 'Last Change');
4252                 print "<th></th>\n" . # for links
4253                       "</tr>\n";
4254         }
4255         my $alternate = 1;
4256         my $tagfilter = $cgi->param('by_tag');
4257         for (my $i = $from; $i <= $to; $i++) {
4258                 my $pr = $projects[$i];
4259
4260                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4261                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4262                         and not $pr->{'descr_long'} =~ /$searchtext/;
4263                 # Weed out forks or non-matching entries of search
4264                 if ($check_forks) {
4265                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4266                         $forkbase="^$forkbase" if $forkbase;
4267                         next if not $searchtext and not $tagfilter and $show_ctags
4268                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4269                 }
4270
4271                 if ($alternate) {
4272                         print "<tr class=\"dark\">\n";
4273                 } else {
4274                         print "<tr class=\"light\">\n";
4275                 }
4276                 $alternate ^= 1;
4277                 if ($check_forks) {
4278                         print "<td>";
4279                         if ($pr->{'forks'}) {
4280                                 print "<!-- $pr->{'forks'} -->\n";
4281                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4282                         }
4283                         print "</td>\n";
4284                 }
4285                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4286                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4287                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4288                                         -class => "list", -title => $pr->{'descr_long'}},
4289                                         esc_html($pr->{'descr'})) . "</td>\n" .
4290                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4291                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4292                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4293                       "<td class=\"link\">" .
4294                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4295                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4296                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4297                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4298                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4299                       "</td>\n" .
4300                       "</tr>\n";
4301         }
4302         if (defined $extra) {
4303                 print "<tr>\n";
4304                 if ($check_forks) {
4305                         print "<td></td>\n";
4306                 }
4307                 print "<td colspan=\"5\">$extra</td>\n" .
4308                       "</tr>\n";
4309         }
4310         print "</table>\n";
4311 }
4312
4313 sub git_shortlog_body {
4314         # uses global variable $project
4315         my ($commitlist, $from, $to, $refs, $extra) = @_;
4316
4317         $from = 0 unless defined $from;
4318         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4319
4320         print "<table class=\"shortlog\">\n";
4321         my $alternate = 1;
4322         for (my $i = $from; $i <= $to; $i++) {
4323                 my %co = %{$commitlist->[$i]};
4324                 my $commit = $co{'id'};
4325                 my $ref = format_ref_marker($refs, $commit);
4326                 if ($alternate) {
4327                         print "<tr class=\"dark\">\n";
4328                 } else {
4329                         print "<tr class=\"light\">\n";
4330                 }
4331                 $alternate ^= 1;
4332                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4333                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4334                       format_author_html('td', \%co, 10) . "<td>";
4335                 print format_subject_html($co{'title'}, $co{'title_short'},
4336                                           href(action=>"commit", hash=>$commit), $ref);
4337                 print "</td>\n" .
4338                       "<td class=\"link\">" .
4339                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4340                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4341                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4342                 my $snapshot_links = format_snapshot_links($commit);
4343                 if (defined $snapshot_links) {
4344                         print " | " . $snapshot_links;
4345                 }
4346                 print "</td>\n" .
4347                       "</tr>\n";
4348         }
4349         if (defined $extra) {
4350                 print "<tr>\n" .
4351                       "<td colspan=\"4\">$extra</td>\n" .
4352                       "</tr>\n";
4353         }
4354         print "</table>\n";
4355 }
4356
4357 sub git_history_body {
4358         # Warning: assumes constant type (blob or tree) during history
4359         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4360
4361         $from = 0 unless defined $from;
4362         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4363
4364         print "<table class=\"history\">\n";
4365         my $alternate = 1;
4366         for (my $i = $from; $i <= $to; $i++) {
4367                 my %co = %{$commitlist->[$i]};
4368                 if (!%co) {
4369                         next;
4370                 }
4371                 my $commit = $co{'id'};
4372
4373                 my $ref = format_ref_marker($refs, $commit);
4374
4375                 if ($alternate) {
4376                         print "<tr class=\"dark\">\n";
4377                 } else {
4378                         print "<tr class=\"light\">\n";
4379                 }
4380                 $alternate ^= 1;
4381                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4382         # shortlog:   format_author_html('td', \%co, 10)
4383                       format_author_html('td', \%co, 15, 3) . "<td>";
4384                 # originally git_history used chop_str($co{'title'}, 50)
4385                 print format_subject_html($co{'title'}, $co{'title_short'},
4386                                           href(action=>"commit", hash=>$commit), $ref);
4387                 print "</td>\n" .
4388                       "<td class=\"link\">" .
4389                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4390                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4391
4392                 if ($ftype eq 'blob') {
4393                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4394                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4395                         if (defined $blob_current && defined $blob_parent &&
4396                                         $blob_current ne $blob_parent) {
4397                                 print " | " .
4398                                         $cgi->a({-href => href(action=>"blobdiff",
4399                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4400                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4401                                                                file_name=>$file_name)},
4402                                                 "diff to current");
4403                         }
4404                 }
4405                 print "</td>\n" .
4406                       "</tr>\n";
4407         }
4408         if (defined $extra) {
4409                 print "<tr>\n" .
4410                       "<td colspan=\"4\">$extra</td>\n" .
4411                       "</tr>\n";
4412         }
4413         print "</table>\n";
4414 }
4415
4416 sub git_tags_body {
4417         # uses global variable $project
4418         my ($taglist, $from, $to, $extra) = @_;
4419         $from = 0 unless defined $from;
4420         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4421
4422         print "<table class=\"tags\">\n";
4423         my $alternate = 1;
4424         for (my $i = $from; $i <= $to; $i++) {
4425                 my $entry = $taglist->[$i];
4426                 my %tag = %$entry;
4427                 my $comment = $tag{'subject'};
4428                 my $comment_short;
4429                 if (defined $comment) {
4430                         $comment_short = chop_str($comment, 30, 5);
4431                 }
4432                 if ($alternate) {
4433                         print "<tr class=\"dark\">\n";
4434                 } else {
4435                         print "<tr class=\"light\">\n";
4436                 }
4437                 $alternate ^= 1;
4438                 if (defined $tag{'age'}) {
4439                         print "<td><i>$tag{'age'}</i></td>\n";
4440                 } else {
4441                         print "<td></td>\n";
4442                 }
4443                 print "<td>" .
4444                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4445                                -class => "list name"}, esc_html($tag{'name'})) .
4446                       "</td>\n" .
4447                       "<td>";
4448                 if (defined $comment) {
4449                         print format_subject_html($comment, $comment_short,
4450                                                   href(action=>"tag", hash=>$tag{'id'}));
4451                 }
4452                 print "</td>\n" .
4453                       "<td class=\"selflink\">";
4454                 if ($tag{'type'} eq "tag") {
4455                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4456                 } else {
4457                         print "&nbsp;";
4458                 }
4459                 print "</td>\n" .
4460                       "<td class=\"link\">" . " | " .
4461                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4462                 if ($tag{'reftype'} eq "commit") {
4463                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4464                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4465                 } elsif ($tag{'reftype'} eq "blob") {
4466                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4467                 }
4468                 print "</td>\n" .
4469                       "</tr>";
4470         }
4471         if (defined $extra) {
4472                 print "<tr>\n" .
4473                       "<td colspan=\"5\">$extra</td>\n" .
4474                       "</tr>\n";
4475         }
4476         print "</table>\n";
4477 }
4478
4479 sub git_heads_body {
4480         # uses global variable $project
4481         my ($headlist, $head, $from, $to, $extra) = @_;
4482         $from = 0 unless defined $from;
4483         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4484
4485         print "<table class=\"heads\">\n";
4486         my $alternate = 1;
4487         for (my $i = $from; $i <= $to; $i++) {
4488                 my $entry = $headlist->[$i];
4489                 my %ref = %$entry;
4490                 my $curr = $ref{'id'} eq $head;
4491                 if ($alternate) {
4492                         print "<tr class=\"dark\">\n";
4493                 } else {
4494                         print "<tr class=\"light\">\n";
4495                 }
4496                 $alternate ^= 1;
4497                 print "<td><i>$ref{'age'}</i></td>\n" .
4498                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4499                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4500                                -class => "list name"},esc_html($ref{'name'})) .
4501                       "</td>\n" .
4502                       "<td class=\"link\">" .
4503                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4504                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4505                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4506                       "</td>\n" .
4507                       "</tr>";
4508         }
4509         if (defined $extra) {
4510                 print "<tr>\n" .
4511                       "<td colspan=\"3\">$extra</td>\n" .
4512                       "</tr>\n";
4513         }
4514         print "</table>\n";
4515 }
4516
4517 sub git_search_grep_body {
4518         my ($commitlist, $from, $to, $extra) = @_;
4519         $from = 0 unless defined $from;
4520         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4521
4522         print "<table class=\"commit_search\">\n";
4523         my $alternate = 1;
4524         for (my $i = $from; $i <= $to; $i++) {
4525                 my %co = %{$commitlist->[$i]};
4526                 if (!%co) {
4527                         next;
4528                 }
4529                 my $commit = $co{'id'};
4530                 if ($alternate) {
4531                         print "<tr class=\"dark\">\n";
4532                 } else {
4533                         print "<tr class=\"light\">\n";
4534                 }
4535                 $alternate ^= 1;
4536                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4537                       format_author_html('td', \%co, 15, 5) .
4538                       "<td>" .
4539                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4540                                -class => "list subject"},
4541                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4542                 my $comment = $co{'comment'};
4543                 foreach my $line (@$comment) {
4544                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4545                                 my ($lead, $match, $trail) = ($1, $2, $3);
4546                                 $match = chop_str($match, 70, 5, 'center');
4547                                 my $contextlen = int((80 - length($match))/2);
4548                                 $contextlen = 30 if ($contextlen > 30);
4549                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4550                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4551
4552                                 $lead  = esc_html($lead);
4553                                 $match = esc_html($match);
4554                                 $trail = esc_html($trail);
4555
4556                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4557                         }
4558                 }
4559                 print "</td>\n" .
4560                       "<td class=\"link\">" .
4561                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4562                       " | " .
4563                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4564                       " | " .
4565                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4566                 print "</td>\n" .
4567                       "</tr>\n";
4568         }
4569         if (defined $extra) {
4570                 print "<tr>\n" .
4571                       "<td colspan=\"3\">$extra</td>\n" .
4572                       "</tr>\n";
4573         }
4574         print "</table>\n";
4575 }
4576
4577 ## ======================================================================
4578 ## ======================================================================
4579 ## actions
4580
4581 sub git_project_list {
4582         my $order = $input_params{'order'};
4583         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4584                 die_error(400, "Unknown order parameter");
4585         }
4586
4587         my @list = git_get_projects_list();
4588         if (!@list) {
4589                 die_error(404, "No projects found");
4590         }
4591
4592         git_header_html();
4593         if (-f $home_text) {
4594                 print "<div class=\"index_include\">\n";
4595                 insert_file($home_text);
4596                 print "</div>\n";
4597         }
4598         print $cgi->startform(-method => "get") .
4599               "<p class=\"projsearch\">Search:\n" .
4600               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4601               "</p>" .
4602               $cgi->end_form() . "\n";
4603         git_project_list_body(\@list, $order);
4604         git_footer_html();
4605 }
4606
4607 sub git_forks {
4608         my $order = $input_params{'order'};
4609         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4610                 die_error(400, "Unknown order parameter");
4611         }
4612
4613         my @list = git_get_projects_list($project);
4614         if (!@list) {
4615                 die_error(404, "No forks found");
4616         }
4617
4618         git_header_html();
4619         git_print_page_nav('','');
4620         git_print_header_div('summary', "$project forks");
4621         git_project_list_body(\@list, $order);
4622         git_footer_html();
4623 }
4624
4625 sub git_project_index {
4626         my @projects = git_get_projects_list($project);
4627
4628         print $cgi->header(
4629                 -type => 'text/plain',
4630                 -charset => 'utf-8',
4631                 -content_disposition => 'inline; filename="index.aux"');
4632
4633         foreach my $pr (@projects) {
4634                 if (!exists $pr->{'owner'}) {
4635                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4636                 }
4637
4638                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4639                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4640                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4641                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4642                 $path  =~ s/ /\+/g;
4643                 $owner =~ s/ /\+/g;
4644
4645                 print "$path $owner\n";
4646         }
4647 }
4648
4649 sub git_summary {
4650         my $descr = git_get_project_description($project) || "none";
4651         my %co = parse_commit("HEAD");
4652         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4653         my $head = $co{'id'};
4654
4655         my $owner = git_get_project_owner($project);
4656
4657         my $refs = git_get_references();
4658         # These get_*_list functions return one more to allow us to see if
4659         # there are more ...
4660         my @taglist  = git_get_tags_list(16);
4661         my @headlist = git_get_heads_list(16);
4662         my @forklist;
4663         my $check_forks = gitweb_check_feature('forks');
4664
4665         if ($check_forks) {
4666                 @forklist = git_get_projects_list($project);
4667         }
4668
4669         git_header_html();
4670         git_print_page_nav('summary','', $head);
4671
4672         print "<div class=\"title\">&nbsp;</div>\n";
4673         print "<table class=\"projects_list\">\n" .
4674               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4675               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4676         if (defined $cd{'rfc2822'}) {
4677                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4678         }
4679
4680         # use per project git URL list in $projectroot/$project/cloneurl
4681         # or make project git URL from git base URL and project name
4682         my $url_tag = "URL";
4683         my @url_list = git_get_project_url_list($project);
4684         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4685         foreach my $git_url (@url_list) {
4686                 next unless $git_url;
4687                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4688                 $url_tag = "";
4689         }
4690
4691         # Tag cloud
4692         my $show_ctags = gitweb_check_feature('ctags');
4693         if ($show_ctags) {
4694                 my $ctags = git_get_project_ctags($project);
4695                 my $cloud = git_populate_project_tagcloud($ctags);
4696                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4697                 print "</td>\n<td>" unless %$ctags;
4698                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4699                 print "</td>\n<td>" if %$ctags;
4700                 print git_show_project_tagcloud($cloud, 48);
4701                 print "</td></tr>";
4702         }
4703
4704         print "</table>\n";
4705
4706         # If XSS prevention is on, we don't include README.html.
4707         # TODO: Allow a readme in some safe format.
4708         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4709                 print "<div class=\"title\">readme</div>\n" .
4710                       "<div class=\"readme\">\n";
4711                 insert_file("$projectroot/$project/README.html");
4712                 print "\n</div>\n"; # class="readme"
4713         }
4714
4715         # we need to request one more than 16 (0..15) to check if
4716         # those 16 are all
4717         my @commitlist = $head ? parse_commits($head, 17) : ();
4718         if (@commitlist) {
4719                 git_print_header_div('shortlog');
4720                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4721                                   $#commitlist <=  15 ? undef :
4722                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4723         }
4724
4725         if (@taglist) {
4726                 git_print_header_div('tags');
4727                 git_tags_body(\@taglist, 0, 15,
4728                               $#taglist <=  15 ? undef :
4729                               $cgi->a({-href => href(action=>"tags")}, "..."));
4730         }
4731
4732         if (@headlist) {
4733                 git_print_header_div('heads');
4734                 git_heads_body(\@headlist, $head, 0, 15,
4735                                $#headlist <= 15 ? undef :
4736                                $cgi->a({-href => href(action=>"heads")}, "..."));
4737         }
4738
4739         if (@forklist) {
4740                 git_print_header_div('forks');
4741                 git_project_list_body(\@forklist, 'age', 0, 15,
4742                                       $#forklist <= 15 ? undef :
4743                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4744                                       'no_header');
4745         }
4746
4747         git_footer_html();
4748 }
4749
4750 sub git_tag {
4751         my $head = git_get_head_hash($project);
4752         git_header_html();
4753         git_print_page_nav('','', $head,undef,$head);
4754         my %tag = parse_tag($hash);
4755
4756         if (! %tag) {
4757                 die_error(404, "Unknown tag object");
4758         }
4759
4760         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4761         print "<div class=\"title_text\">\n" .
4762               "<table class=\"object_header\">\n" .
4763               "<tr>\n" .
4764               "<td>object</td>\n" .
4765               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4766                                $tag{'object'}) . "</td>\n" .
4767               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4768                                               $tag{'type'}) . "</td>\n" .
4769               "</tr>\n";
4770         if (defined($tag{'author'})) {
4771                 git_print_authorship_rows(\%tag, 'author');
4772         }
4773         print "</table>\n\n" .
4774               "</div>\n";
4775         print "<div class=\"page_body\">";
4776         my $comment = $tag{'comment'};
4777         foreach my $line (@$comment) {
4778                 chomp $line;
4779                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4780         }
4781         print "</div>\n";
4782         git_footer_html();
4783 }
4784
4785 sub git_blame {
4786         # permissions
4787         gitweb_check_feature('blame')
4788                 or die_error(403, "Blame view not allowed");
4789
4790         # error checking
4791         die_error(400, "No file name given") unless $file_name;
4792         $hash_base ||= git_get_head_hash($project);
4793         die_error(404, "Couldn't find base commit") unless $hash_base;
4794         my %co = parse_commit($hash_base)
4795                 or die_error(404, "Commit not found");
4796         my $ftype = "blob";
4797         if (!defined $hash) {
4798                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4799                         or die_error(404, "Error looking up file");
4800         } else {
4801                 $ftype = git_get_type($hash);
4802                 if ($ftype !~ "blob") {
4803                         die_error(400, "Object is not a blob");
4804                 }
4805         }
4806
4807         # run git-blame --porcelain
4808         open my $fd, "-|", git_cmd(), "blame", '-p',
4809                 $hash_base, '--', $file_name
4810                 or die_error(500, "Open git-blame failed");
4811
4812         # page header
4813         git_header_html();
4814         my $formats_nav =
4815                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4816                         "blob") .
4817                 " | " .
4818                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4819                         "history") .
4820                 " | " .
4821                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4822                         "HEAD");
4823         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4824         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4825         git_print_page_path($file_name, $ftype, $hash_base);
4826
4827         # page body
4828         my @rev_color = qw(light dark);
4829         my $num_colors = scalar(@rev_color);
4830         my $current_color = 0;
4831         my %metainfo = ();
4832
4833         print <<HTML;
4834 <div class="page_body">
4835 <table class="blame">
4836 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4837 HTML
4838  LINE:
4839         while (my $line = <$fd>) {
4840                 chomp $line;
4841                 # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
4842                 # no <lines in group> for subsequent lines in group of lines
4843                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4844                    ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
4845                 if (!exists $metainfo{$full_rev}) {
4846                         $metainfo{$full_rev} = { 'nprevious' => 0 };
4847                 }
4848                 my $meta = $metainfo{$full_rev};
4849                 my $data;
4850                 while ($data = <$fd>) {
4851                         chomp $data;
4852                         last if ($data =~ s/^\t//); # contents of line
4853                         if ($data =~ /^(\S+)(?: (.*))?$/) {
4854                                 $meta->{$1} = $2 unless exists $meta->{$1};
4855                         }
4856                         if ($data =~ /^previous /) {
4857                                 $meta->{'nprevious'}++;
4858                         }
4859                 }
4860                 my $short_rev = substr($full_rev, 0, 8);
4861                 my $author = $meta->{'author'};
4862                 my %date =
4863                         parse_date($meta->{'author-time'}, $meta->{'author-tz'});
4864                 my $date = $date{'iso-tz'};
4865                 if ($group_size) {
4866                         $current_color = ($current_color + 1) % $num_colors;
4867                 }
4868                 my $tr_class = $rev_color[$current_color];
4869                 $tr_class .= ' boundary' if (exists $meta->{'boundary'});
4870                 $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
4871                 $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
4872                 print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
4873                 if ($group_size) {
4874                         print "<td class=\"sha1\"";
4875                         print " title=\"". esc_html($author) . ", $date\"";
4876                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4877                         print ">";
4878                         print $cgi->a({-href => href(action=>"commit",
4879                                                      hash=>$full_rev,
4880                                                      file_name=>$file_name)},
4881                                       esc_html($short_rev));
4882                         if ($group_size >= 2) {
4883                                 my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
4884                                 if (@author_initials) {
4885                                         print "<br />" .
4886                                               esc_html(join('', @author_initials));
4887                                         #           or join('.', ...)
4888                                 }
4889                         }
4890                         print "</td>\n";
4891                 }
4892                 # 'previous' <sha1 of parent commit> <filename at commit>
4893                 if (exists $meta->{'previous'} &&
4894                     $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
4895                         $meta->{'parent'} = $1;
4896                         $meta->{'file_parent'} = unquote($2);
4897                 }
4898                 my $linenr_commit =
4899                         exists($meta->{'parent'}) ?
4900                         $meta->{'parent'} : $full_rev;
4901                 my $linenr_filename =
4902                         exists($meta->{'file_parent'}) ?
4903                         $meta->{'file_parent'} : unquote($meta->{'filename'});
4904                 my $blamed = href(action => 'blame',
4905                                   file_name => $linenr_filename,
4906                                   hash_base => $linenr_commit);
4907                 print "<td class=\"linenr\">";
4908                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4909                                 -class => "linenr" },
4910                               esc_html($lineno));
4911                 print "</td>";
4912                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4913                 print "</tr>\n";
4914         }
4915         print "</table>\n";
4916         print "</div>";
4917         close $fd
4918                 or print "Reading blob failed\n";
4919
4920         # page footer
4921         git_footer_html();
4922 }
4923
4924 sub git_tags {
4925         my $head = git_get_head_hash($project);
4926         git_header_html();
4927         git_print_page_nav('','', $head,undef,$head);
4928         git_print_header_div('summary', $project);
4929
4930         my @tagslist = git_get_tags_list();
4931         if (@tagslist) {
4932                 git_tags_body(\@tagslist);
4933         }
4934         git_footer_html();
4935 }
4936
4937 sub git_heads {
4938         my $head = git_get_head_hash($project);
4939         git_header_html();
4940         git_print_page_nav('','', $head,undef,$head);
4941         git_print_header_div('summary', $project);
4942
4943         my @headslist = git_get_heads_list();
4944         if (@headslist) {
4945                 git_heads_body(\@headslist, $head);
4946         }
4947         git_footer_html();
4948 }
4949
4950 sub git_blob_plain {
4951         my $type = shift;
4952         my $expires;
4953
4954         if (!defined $hash) {
4955                 if (defined $file_name) {
4956                         my $base = $hash_base || git_get_head_hash($project);
4957                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4958                                 or die_error(404, "Cannot find file");
4959                 } else {
4960                         die_error(400, "No file name defined");
4961                 }
4962         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4963                 # blobs defined by non-textual hash id's can be cached
4964                 $expires = "+1d";
4965         }
4966
4967         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4968                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4969
4970         # content-type (can include charset)
4971         $type = blob_contenttype($fd, $file_name, $type);
4972
4973         # "save as" filename, even when no $file_name is given
4974         my $save_as = "$hash";
4975         if (defined $file_name) {
4976                 $save_as = $file_name;
4977         } elsif ($type =~ m/^text\//) {
4978                 $save_as .= '.txt';
4979         }
4980
4981         # With XSS prevention on, blobs of all types except a few known safe
4982         # ones are served with "Content-Disposition: attachment" to make sure
4983         # they don't run in our security domain.  For certain image types,
4984         # blob view writes an <img> tag referring to blob_plain view, and we
4985         # want to be sure not to break that by serving the image as an
4986         # attachment (though Firefox 3 doesn't seem to care).
4987         my $sandbox = $prevent_xss &&
4988                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
4989
4990         print $cgi->header(
4991                 -type => $type,
4992                 -expires => $expires,
4993                 -content_disposition =>
4994                         ($sandbox ? 'attachment' : 'inline')
4995                         . '; filename="' . $save_as . '"');
4996         local $/ = undef;
4997         binmode STDOUT, ':raw';
4998         print <$fd>;
4999         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5000         close $fd;
5001 }
5002
5003 sub git_blob {
5004         my $expires;
5005
5006         if (!defined $hash) {
5007                 if (defined $file_name) {
5008                         my $base = $hash_base || git_get_head_hash($project);
5009                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5010                                 or die_error(404, "Cannot find file");
5011                 } else {
5012                         die_error(400, "No file name defined");
5013                 }
5014         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5015                 # blobs defined by non-textual hash id's can be cached
5016                 $expires = "+1d";
5017         }
5018
5019         my $have_blame = gitweb_check_feature('blame');
5020         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5021                 or die_error(500, "Couldn't cat $file_name, $hash");
5022         my $mimetype = blob_mimetype($fd, $file_name);
5023         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5024                 close $fd;
5025                 return git_blob_plain($mimetype);
5026         }
5027         # we can have blame only for text/* mimetype
5028         $have_blame &&= ($mimetype =~ m!^text/!);
5029
5030         git_header_html(undef, $expires);
5031         my $formats_nav = '';
5032         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5033                 if (defined $file_name) {
5034                         if ($have_blame) {
5035                                 $formats_nav .=
5036                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5037                                                 "blame") .
5038                                         " | ";
5039                         }
5040                         $formats_nav .=
5041                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5042                                         "history") .
5043                                 " | " .
5044                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5045                                         "raw") .
5046                                 " | " .
5047                                 $cgi->a({-href => href(action=>"blob",
5048                                                        hash_base=>"HEAD", file_name=>$file_name)},
5049                                         "HEAD");
5050                 } else {
5051                         $formats_nav .=
5052                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5053                                         "raw");
5054                 }
5055                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5056                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5057         } else {
5058                 print "<div class=\"page_nav\">\n" .
5059                       "<br/><br/></div>\n" .
5060                       "<div class=\"title\">$hash</div>\n";
5061         }
5062         git_print_page_path($file_name, "blob", $hash_base);
5063         print "<div class=\"page_body\">\n";
5064         if ($mimetype =~ m!^image/!) {
5065                 print qq!<img type="$mimetype"!;
5066                 if ($file_name) {
5067                         print qq! alt="$file_name" title="$file_name"!;
5068                 }
5069                 print qq! src="! .
5070                       href(action=>"blob_plain", hash=>$hash,
5071                            hash_base=>$hash_base, file_name=>$file_name) .
5072                       qq!" />\n!;
5073         } else {
5074                 my $nr;
5075                 while (my $line = <$fd>) {
5076                         chomp $line;
5077                         $nr++;
5078                         $line = untabify($line);
5079                         printf "<div class=\"pre\"><a id=\"l%i\" href=\"#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
5080                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
5081                 }
5082         }
5083         close $fd
5084                 or print "Reading blob failed.\n";
5085         print "</div>";
5086         git_footer_html();
5087 }
5088
5089 sub git_tree {
5090         if (!defined $hash_base) {
5091                 $hash_base = "HEAD";
5092         }
5093         if (!defined $hash) {
5094                 if (defined $file_name) {
5095                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5096                 } else {
5097                         $hash = $hash_base;
5098                 }
5099         }
5100         die_error(404, "No such tree") unless defined($hash);
5101
5102         my @entries = ();
5103         {
5104                 local $/ = "\0";
5105                 open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
5106                         or die_error(500, "Open git-ls-tree failed");
5107                 @entries = map { chomp; $_ } <$fd>;
5108                 close $fd
5109                         or die_error(404, "Reading tree failed");
5110         }
5111
5112         my $refs = git_get_references();
5113         my $ref = format_ref_marker($refs, $hash_base);
5114         git_header_html();
5115         my $basedir = '';
5116         my $have_blame = gitweb_check_feature('blame');
5117         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5118                 my @views_nav = ();
5119                 if (defined $file_name) {
5120                         push @views_nav,
5121                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5122                                         "history"),
5123                                 $cgi->a({-href => href(action=>"tree",
5124                                                        hash_base=>"HEAD", file_name=>$file_name)},
5125                                         "HEAD"),
5126                 }
5127                 my $snapshot_links = format_snapshot_links($hash);
5128                 if (defined $snapshot_links) {
5129                         # FIXME: Should be available when we have no hash base as well.
5130                         push @views_nav, $snapshot_links;
5131                 }
5132                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
5133                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5134         } else {
5135                 undef $hash_base;
5136                 print "<div class=\"page_nav\">\n";
5137                 print "<br/><br/></div>\n";
5138                 print "<div class=\"title\">$hash</div>\n";
5139         }
5140         if (defined $file_name) {
5141                 $basedir = $file_name;
5142                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5143                         $basedir .= '/';
5144                 }
5145                 git_print_page_path($file_name, 'tree', $hash_base);
5146         }
5147         print "<div class=\"page_body\">\n";
5148         print "<table class=\"tree\">\n";
5149         my $alternate = 1;
5150         # '..' (top directory) link if possible
5151         if (defined $hash_base &&
5152             defined $file_name && $file_name =~ m![^/]+$!) {
5153                 if ($alternate) {
5154                         print "<tr class=\"dark\">\n";
5155                 } else {
5156                         print "<tr class=\"light\">\n";
5157                 }
5158                 $alternate ^= 1;
5159
5160                 my $up = $file_name;
5161                 $up =~ s!/?[^/]+$!!;
5162                 undef $up unless $up;
5163                 # based on git_print_tree_entry
5164                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5165                 print '<td class="list">';
5166                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
5167                                              file_name=>$up)},
5168                               "..");
5169                 print "</td>\n";
5170                 print "<td class=\"link\"></td>\n";
5171
5172                 print "</tr>\n";
5173         }
5174         foreach my $line (@entries) {
5175                 my %t = parse_ls_tree_line($line, -z => 1);
5176
5177                 if ($alternate) {
5178                         print "<tr class=\"dark\">\n";
5179                 } else {
5180                         print "<tr class=\"light\">\n";
5181                 }
5182                 $alternate ^= 1;
5183
5184                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5185
5186                 print "</tr>\n";
5187         }
5188         print "</table>\n" .
5189               "</div>";
5190         git_footer_html();
5191 }
5192
5193 sub snapshot_name {
5194         my ($project, $hash) = @_;
5195
5196         # path/to/project.git  -> project
5197         # path/to/project/.git -> project
5198         my $name = to_utf8($project);
5199         $name =~ s,([^/])/*\.git$,$1,;
5200         $name = basename($name);
5201         # sanitize name
5202         $name =~ s/[[:cntrl:]]/?/g;
5203
5204         my $ver = $hash;
5205         if ($hash =~ /^[0-9a-fA-F]+$/) {
5206                 # shorten SHA-1 hash
5207                 my $full_hash = git_get_full_hash($project, $hash);
5208                 if ($full_hash =~ /^$hash/ && length($hash) > 7) {
5209                         $ver = git_get_short_hash($project, $hash);
5210                 }
5211         } elsif ($hash =~ m!^refs/tags/(.*)$!) {
5212                 # tags don't need shortened SHA-1 hash
5213                 $ver = $1;
5214         } else {
5215                 # branches and other need shortened SHA-1 hash
5216                 if ($hash =~ m!^refs/(?:heads|remotes)/(.*)$!) {
5217                         $ver = $1;
5218                 }
5219                 $ver .= '-' . git_get_short_hash($project, $hash);
5220         }
5221         # in case of hierarchical branch names
5222         $ver =~ s!/!.!g;
5223
5224         # name = project-version_string
5225         $name = "$name-$ver";
5226
5227         return wantarray ? ($name, $name) : $name;
5228 }
5229
5230 sub git_snapshot {
5231         my $format = $input_params{'snapshot_format'};
5232         if (!@snapshot_fmts) {
5233                 die_error(403, "Snapshots not allowed");
5234         }
5235         # default to first supported snapshot format
5236         $format ||= $snapshot_fmts[0];
5237         if ($format !~ m/^[a-z0-9]+$/) {
5238                 die_error(400, "Invalid snapshot format parameter");
5239         } elsif (!exists($known_snapshot_formats{$format})) {
5240                 die_error(400, "Unknown snapshot format");
5241         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5242                 die_error(403, "Snapshot format not allowed");
5243         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5244                 die_error(403, "Unsupported snapshot format");
5245         }
5246
5247         my $type = git_get_type("$hash^{}");
5248         if (!$type) {
5249                 die_error(404, 'Object does not exist');
5250         }  elsif ($type eq 'blob') {
5251                 die_error(400, 'Object is not a tree-ish');
5252         }
5253
5254         my ($name, $prefix) = snapshot_name($project, $hash);
5255         my $filename = "$name$known_snapshot_formats{$format}{'suffix'}";
5256         my $cmd = quote_command(
5257                 git_cmd(), 'archive',
5258                 "--format=$known_snapshot_formats{$format}{'format'}",
5259                 "--prefix=$prefix/", $hash);
5260         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5261                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5262         }
5263
5264         $filename =~ s/(["\\])/\\$1/g;
5265         print $cgi->header(
5266                 -type => $known_snapshot_formats{$format}{'type'},
5267                 -content_disposition => 'inline; filename="' . $filename . '"',
5268                 -status => '200 OK');
5269
5270         open my $fd, "-|", $cmd
5271                 or die_error(500, "Execute git-archive failed");
5272         binmode STDOUT, ':raw';
5273         print <$fd>;
5274         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5275         close $fd;
5276 }
5277
5278 sub git_log {
5279         my $head = git_get_head_hash($project);
5280         if (!defined $hash) {
5281                 $hash = $head;
5282         }
5283         if (!defined $page) {
5284                 $page = 0;
5285         }
5286         my $refs = git_get_references();
5287
5288         my @commitlist = parse_commits($hash, 101, (100 * $page));
5289
5290         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
5291
5292         my ($patch_max) = gitweb_get_feature('patches');
5293         if ($patch_max) {
5294                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5295                         $paging_nav .= " &sdot; " .
5296                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5297                                         "patches");
5298                 }
5299         }
5300
5301         git_header_html();
5302         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5303
5304         if (!@commitlist) {
5305                 my %co = parse_commit($hash);
5306
5307                 git_print_header_div('summary', $project);
5308                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5309         }
5310         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5311         for (my $i = 0; $i <= $to; $i++) {
5312                 my %co = %{$commitlist[$i]};
5313                 next if !%co;
5314                 my $commit = $co{'id'};
5315                 my $ref = format_ref_marker($refs, $commit);
5316                 my %ad = parse_date($co{'author_epoch'});
5317                 git_print_header_div('commit',
5318                                "<span class=\"age\">$co{'age_string'}</span>" .
5319                                esc_html($co{'title'}) . $ref,
5320                                $commit);
5321                 print "<div class=\"title_text\">\n" .
5322                       "<div class=\"log_link\">\n" .
5323                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5324                       " | " .
5325                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5326                       " | " .
5327                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5328                       "<br/>\n" .
5329                       "</div>\n";
5330                       git_print_authorship(\%co, -tag => 'span');
5331                       print "<br/>\n</div>\n";
5332
5333                 print "<div class=\"log_body\">\n";
5334                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5335                 print "</div>\n";
5336         }
5337         if ($#commitlist >= 100) {
5338                 print "<div class=\"page_nav\">\n";
5339                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5340                                -accesskey => "n", -title => "Alt-n"}, "next");
5341                 print "</div>\n";
5342         }
5343         git_footer_html();
5344 }
5345
5346 sub git_commit {
5347         $hash ||= $hash_base || "HEAD";
5348         my %co = parse_commit($hash)
5349             or die_error(404, "Unknown commit object");
5350
5351         my $parent  = $co{'parent'};
5352         my $parents = $co{'parents'}; # listref
5353
5354         # we need to prepare $formats_nav before any parameter munging
5355         my $formats_nav;
5356         if (!defined $parent) {
5357                 # --root commitdiff
5358                 $formats_nav .= '(initial)';
5359         } elsif (@$parents == 1) {
5360                 # single parent commit
5361                 $formats_nav .=
5362                         '(parent: ' .
5363                         $cgi->a({-href => href(action=>"commit",
5364                                                hash=>$parent)},
5365                                 esc_html(substr($parent, 0, 7))) .
5366                         ')';
5367         } else {
5368                 # merge commit
5369                 $formats_nav .=
5370                         '(merge: ' .
5371                         join(' ', map {
5372                                 $cgi->a({-href => href(action=>"commit",
5373                                                        hash=>$_)},
5374                                         esc_html(substr($_, 0, 7)));
5375                         } @$parents ) .
5376                         ')';
5377         }
5378         if (gitweb_check_feature('patches')) {
5379                 $formats_nav .= " | " .
5380                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5381                                 "patch");
5382         }
5383
5384         if (!defined $parent) {
5385                 $parent = "--root";
5386         }
5387         my @difftree;
5388         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5389                 @diff_opts,
5390                 (@$parents <= 1 ? $parent : '-c'),
5391                 $hash, "--"
5392                 or die_error(500, "Open git-diff-tree failed");
5393         @difftree = map { chomp; $_ } <$fd>;
5394         close $fd or die_error(404, "Reading git-diff-tree failed");
5395
5396         # non-textual hash id's can be cached
5397         my $expires;
5398         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5399                 $expires = "+1d";
5400         }
5401         my $refs = git_get_references();
5402         my $ref = format_ref_marker($refs, $co{'id'});
5403
5404         git_header_html(undef, $expires);
5405         git_print_page_nav('commit', '',
5406                            $hash, $co{'tree'}, $hash,
5407                            $formats_nav);
5408
5409         if (defined $co{'parent'}) {
5410                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5411         } else {
5412                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5413         }
5414         print "<div class=\"title_text\">\n" .
5415               "<table class=\"object_header\">\n";
5416         git_print_authorship_rows(\%co);
5417         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5418         print "<tr>" .
5419               "<td>tree</td>" .
5420               "<td class=\"sha1\">" .
5421               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5422                        class => "list"}, $co{'tree'}) .
5423               "</td>" .
5424               "<td class=\"link\">" .
5425               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5426                       "tree");
5427         my $snapshot_links = format_snapshot_links($hash);
5428         if (defined $snapshot_links) {
5429                 print " | " . $snapshot_links;
5430         }
5431         print "</td>" .
5432               "</tr>\n";
5433
5434         foreach my $par (@$parents) {
5435                 print "<tr>" .
5436                       "<td>parent</td>" .
5437                       "<td class=\"sha1\">" .
5438                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5439                                class => "list"}, $par) .
5440                       "</td>" .
5441                       "<td class=\"link\">" .
5442                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5443                       " | " .
5444                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5445                       "</td>" .
5446                       "</tr>\n";
5447         }
5448         print "</table>".
5449               "</div>\n";
5450
5451         print "<div class=\"page_body\">\n";
5452         git_print_log($co{'comment'});
5453         print "</div>\n";
5454
5455         git_difftree_body(\@difftree, $hash, @$parents);
5456
5457         git_footer_html();
5458 }
5459
5460 sub git_object {
5461         # object is defined by:
5462         # - hash or hash_base alone
5463         # - hash_base and file_name
5464         my $type;
5465
5466         # - hash or hash_base alone
5467         if ($hash || ($hash_base && !defined $file_name)) {
5468                 my $object_id = $hash || $hash_base;
5469
5470                 open my $fd, "-|", quote_command(
5471                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5472                         or die_error(404, "Object does not exist");
5473                 $type = <$fd>;
5474                 chomp $type;
5475                 close $fd
5476                         or die_error(404, "Object does not exist");
5477
5478         # - hash_base and file_name
5479         } elsif ($hash_base && defined $file_name) {
5480                 $file_name =~ s,/+$,,;
5481
5482                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5483                         or die_error(404, "Base object does not exist");
5484
5485                 # here errors should not hapen
5486                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5487                         or die_error(500, "Open git-ls-tree failed");
5488                 my $line = <$fd>;
5489                 close $fd;
5490
5491                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5492                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5493                         die_error(404, "File or directory for given base does not exist");
5494                 }
5495                 $type = $2;
5496                 $hash = $3;
5497         } else {
5498                 die_error(400, "Not enough information to find object");
5499         }
5500
5501         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5502                                           hash=>$hash, hash_base=>$hash_base,
5503                                           file_name=>$file_name),
5504                              -status => '302 Found');
5505 }
5506
5507 sub git_blobdiff {
5508         my $format = shift || 'html';
5509
5510         my $fd;
5511         my @difftree;
5512         my %diffinfo;
5513         my $expires;
5514
5515         # preparing $fd and %diffinfo for git_patchset_body
5516         # new style URI
5517         if (defined $hash_base && defined $hash_parent_base) {
5518                 if (defined $file_name) {
5519                         # read raw output
5520                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5521                                 $hash_parent_base, $hash_base,
5522                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5523                                 or die_error(500, "Open git-diff-tree failed");
5524                         @difftree = map { chomp; $_ } <$fd>;
5525                         close $fd
5526                                 or die_error(404, "Reading git-diff-tree failed");
5527                         @difftree
5528                                 or die_error(404, "Blob diff not found");
5529
5530                 } elsif (defined $hash &&
5531                          $hash =~ /[0-9a-fA-F]{40}/) {
5532                         # try to find filename from $hash
5533
5534                         # read filtered raw output
5535                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5536                                 $hash_parent_base, $hash_base, "--"
5537                                 or die_error(500, "Open git-diff-tree failed");
5538                         @difftree =
5539                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5540                                 # $hash == to_id
5541                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5542                                 map { chomp; $_ } <$fd>;
5543                         close $fd
5544                                 or die_error(404, "Reading git-diff-tree failed");
5545                         @difftree
5546                                 or die_error(404, "Blob diff not found");
5547
5548                 } else {
5549                         die_error(400, "Missing one of the blob diff parameters");
5550                 }
5551
5552                 if (@difftree > 1) {
5553                         die_error(400, "Ambiguous blob diff specification");
5554                 }
5555
5556                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5557                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5558                 $file_name   ||= $diffinfo{'to_file'};
5559
5560                 $hash_parent ||= $diffinfo{'from_id'};
5561                 $hash        ||= $diffinfo{'to_id'};
5562
5563                 # non-textual hash id's can be cached
5564                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5565                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5566                         $expires = '+1d';
5567                 }
5568
5569                 # open patch output
5570                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5571                         '-p', ($format eq 'html' ? "--full-index" : ()),
5572                         $hash_parent_base, $hash_base,
5573                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5574                         or die_error(500, "Open git-diff-tree failed");
5575         }
5576
5577         # old/legacy style URI -- not generated anymore since 1.4.3.
5578         if (!%diffinfo) {
5579                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5580         }
5581
5582         # header
5583         if ($format eq 'html') {
5584                 my $formats_nav =
5585                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5586                                 "raw");
5587                 git_header_html(undef, $expires);
5588                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5589                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5590                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5591                 } else {
5592                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5593                         print "<div class=\"title\">$hash vs $hash_parent</div>\n";
5594                 }
5595                 if (defined $file_name) {
5596                         git_print_page_path($file_name, "blob", $hash_base);
5597                 } else {
5598                         print "<div class=\"page_path\"></div>\n";
5599                 }
5600
5601         } elsif ($format eq 'plain') {
5602                 print $cgi->header(
5603                         -type => 'text/plain',
5604                         -charset => 'utf-8',
5605                         -expires => $expires,
5606                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5607
5608                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5609
5610         } else {
5611                 die_error(400, "Unknown blobdiff format");
5612         }
5613
5614         # patch
5615         if ($format eq 'html') {
5616                 print "<div class=\"page_body\">\n";
5617
5618                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5619                 close $fd;
5620
5621                 print "</div>\n"; # class="page_body"
5622                 git_footer_html();
5623
5624         } else {
5625                 while (my $line = <$fd>) {
5626                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5627                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5628
5629                         print $line;
5630
5631                         last if $line =~ m!^\+\+\+!;
5632                 }
5633                 local $/ = undef;
5634                 print <$fd>;
5635                 close $fd;
5636         }
5637 }
5638
5639 sub git_blobdiff_plain {
5640         git_blobdiff('plain');
5641 }
5642
5643 sub git_commitdiff {
5644         my %params = @_;
5645         my $format = $params{-format} || 'html';
5646
5647         my ($patch_max) = gitweb_get_feature('patches');
5648         if ($format eq 'patch') {
5649                 die_error(403, "Patch view not allowed") unless $patch_max;
5650         }
5651
5652         $hash ||= $hash_base || "HEAD";
5653         my %co = parse_commit($hash)
5654             or die_error(404, "Unknown commit object");
5655
5656         # choose format for commitdiff for merge
5657         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5658                 $hash_parent = '--cc';
5659         }
5660         # we need to prepare $formats_nav before almost any parameter munging
5661         my $formats_nav;
5662         if ($format eq 'html') {
5663                 $formats_nav =
5664                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5665                                 "raw");
5666                 if ($patch_max) {
5667                         $formats_nav .= " | " .
5668                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5669                                         "patch");
5670                 }
5671
5672                 if (defined $hash_parent &&
5673                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5674                         # commitdiff with two commits given
5675                         my $hash_parent_short = $hash_parent;
5676                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5677                                 $hash_parent_short = substr($hash_parent, 0, 7);
5678                         }
5679                         $formats_nav .=
5680                                 ' (from';
5681                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5682                                 if ($co{'parents'}[$i] eq $hash_parent) {
5683                                         $formats_nav .= ' parent ' . ($i+1);
5684                                         last;
5685                                 }
5686                         }
5687                         $formats_nav .= ': ' .
5688                                 $cgi->a({-href => href(action=>"commitdiff",
5689                                                        hash=>$hash_parent)},
5690                                         esc_html($hash_parent_short)) .
5691                                 ')';
5692                 } elsif (!$co{'parent'}) {
5693                         # --root commitdiff
5694                         $formats_nav .= ' (initial)';
5695                 } elsif (scalar @{$co{'parents'}} == 1) {
5696                         # single parent commit
5697                         $formats_nav .=
5698                                 ' (parent: ' .
5699                                 $cgi->a({-href => href(action=>"commitdiff",
5700                                                        hash=>$co{'parent'})},
5701                                         esc_html(substr($co{'parent'}, 0, 7))) .
5702                                 ')';
5703                 } else {
5704                         # merge commit
5705                         if ($hash_parent eq '--cc') {
5706                                 $formats_nav .= ' | ' .
5707                                         $cgi->a({-href => href(action=>"commitdiff",
5708                                                                hash=>$hash, hash_parent=>'-c')},
5709                                                 'combined');
5710                         } else { # $hash_parent eq '-c'
5711                                 $formats_nav .= ' | ' .
5712                                         $cgi->a({-href => href(action=>"commitdiff",
5713                                                                hash=>$hash, hash_parent=>'--cc')},
5714                                                 'compact');
5715                         }
5716                         $formats_nav .=
5717                                 ' (merge: ' .
5718                                 join(' ', map {
5719                                         $cgi->a({-href => href(action=>"commitdiff",
5720                                                                hash=>$_)},
5721                                                 esc_html(substr($_, 0, 7)));
5722                                 } @{$co{'parents'}} ) .
5723                                 ')';
5724                 }
5725         }
5726
5727         my $hash_parent_param = $hash_parent;
5728         if (!defined $hash_parent_param) {
5729                 # --cc for multiple parents, --root for parentless
5730                 $hash_parent_param =
5731                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5732         }
5733
5734         # read commitdiff
5735         my $fd;
5736         my @difftree;
5737         if ($format eq 'html') {
5738                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5739                         "--no-commit-id", "--patch-with-raw", "--full-index",
5740                         $hash_parent_param, $hash, "--"
5741                         or die_error(500, "Open git-diff-tree failed");
5742
5743                 while (my $line = <$fd>) {
5744                         chomp $line;
5745                         # empty line ends raw part of diff-tree output
5746                         last unless $line;
5747                         push @difftree, scalar parse_difftree_raw_line($line);
5748                 }
5749
5750         } elsif ($format eq 'plain') {
5751                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5752                         '-p', $hash_parent_param, $hash, "--"
5753                         or die_error(500, "Open git-diff-tree failed");
5754         } elsif ($format eq 'patch') {
5755                 # For commit ranges, we limit the output to the number of
5756                 # patches specified in the 'patches' feature.
5757                 # For single commits, we limit the output to a single patch,
5758                 # diverging from the git-format-patch default.
5759                 my @commit_spec = ();
5760                 if ($hash_parent) {
5761                         if ($patch_max > 0) {
5762                                 push @commit_spec, "-$patch_max";
5763                         }
5764                         push @commit_spec, '-n', "$hash_parent..$hash";
5765                 } else {
5766                         if ($params{-single}) {
5767                                 push @commit_spec, '-1';
5768                         } else {
5769                                 if ($patch_max > 0) {
5770                                         push @commit_spec, "-$patch_max";
5771                                 }
5772                                 push @commit_spec, "-n";
5773                         }
5774                         push @commit_spec, '--root', $hash;
5775                 }
5776                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5777                         '--stdout', @commit_spec
5778                         or die_error(500, "Open git-format-patch failed");
5779         } else {
5780                 die_error(400, "Unknown commitdiff format");
5781         }
5782
5783         # non-textual hash id's can be cached
5784         my $expires;
5785         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5786                 $expires = "+1d";
5787         }
5788
5789         # write commit message
5790         if ($format eq 'html') {
5791                 my $refs = git_get_references();
5792                 my $ref = format_ref_marker($refs, $co{'id'});
5793
5794                 git_header_html(undef, $expires);
5795                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5796                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5797                 print "<div class=\"title_text\">\n" .
5798                       "<table class=\"object_header\">\n";
5799                 git_print_authorship_rows(\%co);
5800                 print "</table>".
5801                       "</div>\n";
5802                 print "<div class=\"page_body\">\n";
5803                 if (@{$co{'comment'}} > 1) {
5804                         print "<div class=\"log\">\n";
5805                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5806                         print "</div>\n"; # class="log"
5807                 }
5808
5809         } elsif ($format eq 'plain') {
5810                 my $refs = git_get_references("tags");
5811                 my $tagname = git_get_rev_name_tags($hash);
5812                 my $filename = basename($project) . "-$hash.patch";
5813
5814                 print $cgi->header(
5815                         -type => 'text/plain',
5816                         -charset => 'utf-8',
5817                         -expires => $expires,
5818                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5819                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5820                 print "From: " . to_utf8($co{'author'}) . "\n";
5821                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5822                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5823
5824                 print "X-Git-Tag: $tagname\n" if $tagname;
5825                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5826
5827                 foreach my $line (@{$co{'comment'}}) {
5828                         print to_utf8($line) . "\n";
5829                 }
5830                 print "---\n\n";
5831         } elsif ($format eq 'patch') {
5832                 my $filename = basename($project) . "-$hash.patch";
5833
5834                 print $cgi->header(
5835                         -type => 'text/plain',
5836                         -charset => 'utf-8',
5837                         -expires => $expires,
5838                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5839         }
5840
5841         # write patch
5842         if ($format eq 'html') {
5843                 my $use_parents = !defined $hash_parent ||
5844                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5845                 git_difftree_body(\@difftree, $hash,
5846                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5847                 print "<br/>\n";
5848
5849                 git_patchset_body($fd, \@difftree, $hash,
5850                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5851                 close $fd;
5852                 print "</div>\n"; # class="page_body"
5853                 git_footer_html();
5854
5855         } elsif ($format eq 'plain') {
5856                 local $/ = undef;
5857                 print <$fd>;
5858                 close $fd
5859                         or print "Reading git-diff-tree failed\n";
5860         } elsif ($format eq 'patch') {
5861                 local $/ = undef;
5862                 print <$fd>;
5863                 close $fd
5864                         or print "Reading git-format-patch failed\n";
5865         }
5866 }
5867
5868 sub git_commitdiff_plain {
5869         git_commitdiff(-format => 'plain');
5870 }
5871
5872 # format-patch-style patches
5873 sub git_patch {
5874         git_commitdiff(-format => 'patch', -single=> 1);
5875 }
5876
5877 sub git_patches {
5878         git_commitdiff(-format => 'patch');
5879 }
5880
5881 sub git_history {
5882         if (!defined $hash_base) {
5883                 $hash_base = git_get_head_hash($project);
5884         }
5885         if (!defined $page) {
5886                 $page = 0;
5887         }
5888         my $ftype;
5889         my %co = parse_commit($hash_base)
5890             or die_error(404, "Unknown commit object");
5891
5892         my $refs = git_get_references();
5893         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5894
5895         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5896                                        $file_name, "--full-history")
5897             or die_error(404, "No such file or directory on given branch");
5898
5899         if (!defined $hash && defined $file_name) {
5900                 # some commits could have deleted file in question,
5901                 # and not have it in tree, but one of them has to have it
5902                 for (my $i = 0; $i <= @commitlist; $i++) {
5903                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5904                         last if defined $hash;
5905                 }
5906         }
5907         if (defined $hash) {
5908                 $ftype = git_get_type($hash);
5909         }
5910         if (!defined $ftype) {
5911                 die_error(500, "Unknown type of object");
5912         }
5913
5914         my $paging_nav = '';
5915         if ($page > 0) {
5916                 $paging_nav .=
5917                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5918                                                file_name=>$file_name)},
5919                                 "first");
5920                 $paging_nav .= " &sdot; " .
5921                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5922                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5923         } else {
5924                 $paging_nav .= "first";
5925                 $paging_nav .= " &sdot; prev";
5926         }
5927         my $next_link = '';
5928         if ($#commitlist >= 100) {
5929                 $next_link =
5930                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5931                                  -accesskey => "n", -title => "Alt-n"}, "next");
5932                 $paging_nav .= " &sdot; $next_link";
5933         } else {
5934                 $paging_nav .= " &sdot; next";
5935         }
5936
5937         git_header_html();
5938         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5939         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5940         git_print_page_path($file_name, $ftype, $hash_base);
5941
5942         git_history_body(\@commitlist, 0, 99,
5943                          $refs, $hash_base, $ftype, $next_link);
5944
5945         git_footer_html();
5946 }
5947
5948 sub git_search {
5949         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5950         if (!defined $searchtext) {
5951                 die_error(400, "Text field is empty");
5952         }
5953         if (!defined $hash) {
5954                 $hash = git_get_head_hash($project);
5955         }
5956         my %co = parse_commit($hash);
5957         if (!%co) {
5958                 die_error(404, "Unknown commit object");
5959         }
5960         if (!defined $page) {
5961                 $page = 0;
5962         }
5963
5964         $searchtype ||= 'commit';
5965         if ($searchtype eq 'pickaxe') {
5966                 # pickaxe may take all resources of your box and run for several minutes
5967                 # with every query - so decide by yourself how public you make this feature
5968                 gitweb_check_feature('pickaxe')
5969                     or die_error(403, "Pickaxe is disabled");
5970         }
5971         if ($searchtype eq 'grep') {
5972                 gitweb_check_feature('grep')
5973                     or die_error(403, "Grep is disabled");
5974         }
5975
5976         git_header_html();
5977
5978         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5979                 my $greptype;
5980                 if ($searchtype eq 'commit') {
5981                         $greptype = "--grep=";
5982                 } elsif ($searchtype eq 'author') {
5983                         $greptype = "--author=";
5984                 } elsif ($searchtype eq 'committer') {
5985                         $greptype = "--committer=";
5986                 }
5987                 $greptype .= $searchtext;
5988                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5989                                                $greptype, '--regexp-ignore-case',
5990                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5991
5992                 my $paging_nav = '';
5993                 if ($page > 0) {
5994                         $paging_nav .=
5995                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5996                                                        searchtext=>$searchtext,
5997                                                        searchtype=>$searchtype)},
5998                                         "first");
5999                         $paging_nav .= " &sdot; " .
6000                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
6001                                          -accesskey => "p", -title => "Alt-p"}, "prev");
6002                 } else {
6003                         $paging_nav .= "first";
6004                         $paging_nav .= " &sdot; prev";
6005                 }
6006                 my $next_link = '';
6007                 if ($#commitlist >= 100) {
6008                         $next_link =
6009                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
6010                                          -accesskey => "n", -title => "Alt-n"}, "next");
6011                         $paging_nav .= " &sdot; $next_link";
6012                 } else {
6013                         $paging_nav .= " &sdot; next";
6014                 }
6015
6016                 if ($#commitlist >= 100) {
6017                 }
6018
6019                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
6020                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6021                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
6022         }
6023
6024         if ($searchtype eq 'pickaxe') {
6025                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6026                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6027
6028                 print "<table class=\"pickaxe search\">\n";
6029                 my $alternate = 1;
6030                 local $/ = "\n";
6031                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
6032                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
6033                         ($search_use_regexp ? '--pickaxe-regex' : ());
6034                 undef %co;
6035                 my @files;
6036                 while (my $line = <$fd>) {
6037                         chomp $line;
6038                         next unless $line;
6039
6040                         my %set = parse_difftree_raw_line($line);
6041                         if (defined $set{'commit'}) {
6042                                 # finish previous commit
6043                                 if (%co) {
6044                                         print "</td>\n" .
6045                                               "<td class=\"link\">" .
6046                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6047                                               " | " .
6048                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6049                                         print "</td>\n" .
6050                                               "</tr>\n";
6051                                 }
6052
6053                                 if ($alternate) {
6054                                         print "<tr class=\"dark\">\n";
6055                                 } else {
6056                                         print "<tr class=\"light\">\n";
6057                                 }
6058                                 $alternate ^= 1;
6059                                 %co = parse_commit($set{'commit'});
6060                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6061                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6062                                       "<td><i>$author</i></td>\n" .
6063                                       "<td>" .
6064                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6065                                               -class => "list subject"},
6066                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6067                         } elsif (defined $set{'to_id'}) {
6068                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6069
6070                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6071                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6072                                               -class => "list"},
6073                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6074                                       "<br/>\n";
6075                         }
6076                 }
6077                 close $fd;
6078
6079                 # finish last commit (warning: repetition!)
6080                 if (%co) {
6081                         print "</td>\n" .
6082                               "<td class=\"link\">" .
6083                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6084                               " | " .
6085                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6086                         print "</td>\n" .
6087                               "</tr>\n";
6088                 }
6089
6090                 print "</table>\n";
6091         }
6092
6093         if ($searchtype eq 'grep') {
6094                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6095                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6096
6097                 print "<table class=\"grep_search\">\n";
6098                 my $alternate = 1;
6099                 my $matches = 0;
6100                 local $/ = "\n";
6101                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6102                         $search_use_regexp ? ('-E', '-i') : '-F',
6103                         $searchtext, $co{'tree'};
6104                 my $lastfile = '';
6105                 while (my $line = <$fd>) {
6106                         chomp $line;
6107                         my ($file, $lno, $ltext, $binary);
6108                         last if ($matches++ > 1000);
6109                         if ($line =~ /^Binary file (.+) matches$/) {
6110                                 $file = $1;
6111                                 $binary = 1;
6112                         } else {
6113                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6114                         }
6115                         if ($file ne $lastfile) {
6116                                 $lastfile and print "</td></tr>\n";
6117                                 if ($alternate++) {
6118                                         print "<tr class=\"dark\">\n";
6119                                 } else {
6120                                         print "<tr class=\"light\">\n";
6121                                 }
6122                                 print "<td class=\"list\">".
6123                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6124                                                                file_name=>"$file"),
6125                                                 -class => "list"}, esc_path($file));
6126                                 print "</td><td>\n";
6127                                 $lastfile = $file;
6128                         }
6129                         if ($binary) {
6130                                 print "<div class=\"binary\">Binary file</div>\n";
6131                         } else {
6132                                 $ltext = untabify($ltext);
6133                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6134                                         $ltext = esc_html($1, -nbsp=>1);
6135                                         $ltext .= '<span class="match">';
6136                                         $ltext .= esc_html($2, -nbsp=>1);
6137                                         $ltext .= '</span>';
6138                                         $ltext .= esc_html($3, -nbsp=>1);
6139                                 } else {
6140                                         $ltext = esc_html($ltext, -nbsp=>1);
6141                                 }
6142                                 print "<div class=\"pre\">" .
6143                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6144                                                                file_name=>"$file").'#l'.$lno,
6145                                                 -class => "linenr"}, sprintf('%4i', $lno))
6146                                         . ' ' .  $ltext . "</div>\n";
6147                         }
6148                 }
6149                 if ($lastfile) {
6150                         print "</td></tr>\n";
6151                         if ($matches > 1000) {
6152                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6153                         }
6154                 } else {
6155                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6156                 }
6157                 close $fd;
6158
6159                 print "</table>\n";
6160         }
6161         git_footer_html();
6162 }
6163
6164 sub git_search_help {
6165         git_header_html();
6166         git_print_page_nav('','', $hash,$hash,$hash);
6167         print <<EOT;
6168 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6169 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6170 the pattern entered is recognized as the POSIX extended
6171 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6172 insensitive).</p>
6173 <dl>
6174 <dt><b>commit</b></dt>
6175 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6176 EOT
6177         my $have_grep = gitweb_check_feature('grep');
6178         if ($have_grep) {
6179                 print <<EOT;
6180 <dt><b>grep</b></dt>
6181 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6182     a different one) are searched for the given pattern. On large trees, this search can take
6183 a while and put some strain on the server, so please use it with some consideration. Note that
6184 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6185 case-sensitive.</dd>
6186 EOT
6187         }
6188         print <<EOT;
6189 <dt><b>author</b></dt>
6190 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6191 <dt><b>committer</b></dt>
6192 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6193 EOT
6194         my $have_pickaxe = gitweb_check_feature('pickaxe');
6195         if ($have_pickaxe) {
6196                 print <<EOT;
6197 <dt><b>pickaxe</b></dt>
6198 <dd>All commits that caused the string to appear or disappear from any file (changes that
6199 added, removed or "modified" the string) will be listed. This search can take a while and
6200 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6201 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6202 EOT
6203         }
6204         print "</dl>\n";
6205         git_footer_html();
6206 }
6207
6208 sub git_shortlog {
6209         my $head = git_get_head_hash($project);
6210         if (!defined $hash) {
6211                 $hash = $head;
6212         }
6213         if (!defined $page) {
6214                 $page = 0;
6215         }
6216         my $refs = git_get_references();
6217
6218         my $commit_hash = $hash;
6219         if (defined $hash_parent) {
6220                 $commit_hash = "$hash_parent..$hash";
6221         }
6222         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
6223
6224         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
6225         my $next_link = '';
6226         if ($#commitlist >= 100) {
6227                 $next_link =
6228                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6229                                  -accesskey => "n", -title => "Alt-n"}, "next");
6230         }
6231         my $patch_max = gitweb_check_feature('patches');
6232         if ($patch_max) {
6233                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6234                         $paging_nav .= " &sdot; " .
6235                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6236                                         "patches");
6237                 }
6238         }
6239
6240         git_header_html();
6241         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
6242         git_print_header_div('summary', $project);
6243
6244         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
6245
6246         git_footer_html();
6247 }
6248
6249 ## ......................................................................
6250 ## feeds (RSS, Atom; OPML)
6251
6252 sub git_feed {
6253         my $format = shift || 'atom';
6254         my $have_blame = gitweb_check_feature('blame');
6255
6256         # Atom: http://www.atomenabled.org/developers/syndication/
6257         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6258         if ($format ne 'rss' && $format ne 'atom') {
6259                 die_error(400, "Unknown web feed format");
6260         }
6261
6262         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6263         my $head = $hash || 'HEAD';
6264         my @commitlist = parse_commits($head, 150, 0, $file_name);
6265
6266         my %latest_commit;
6267         my %latest_date;
6268         my $content_type = "application/$format+xml";
6269         if (defined $cgi->http('HTTP_ACCEPT') &&
6270                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6271                 # browser (feed reader) prefers text/xml
6272                 $content_type = 'text/xml';
6273         }
6274         if (defined($commitlist[0])) {
6275                 %latest_commit = %{$commitlist[0]};
6276                 my $latest_epoch = $latest_commit{'committer_epoch'};
6277                 %latest_date   = parse_date($latest_epoch);
6278                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6279                 if (defined $if_modified) {
6280                         my $since;
6281                         if (eval { require HTTP::Date; 1; }) {
6282                                 $since = HTTP::Date::str2time($if_modified);
6283                         } elsif (eval { require Time::ParseDate; 1; }) {
6284                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6285                         }
6286                         if (defined $since && $latest_epoch <= $since) {
6287                                 print $cgi->header(
6288                                         -type => $content_type,
6289                                         -charset => 'utf-8',
6290                                         -last_modified => $latest_date{'rfc2822'},
6291                                         -status => '304 Not Modified');
6292                                 return;
6293                         }
6294                 }
6295                 print $cgi->header(
6296                         -type => $content_type,
6297                         -charset => 'utf-8',
6298                         -last_modified => $latest_date{'rfc2822'});
6299         } else {
6300                 print $cgi->header(
6301                         -type => $content_type,
6302                         -charset => 'utf-8');
6303         }
6304
6305         # Optimization: skip generating the body if client asks only
6306         # for Last-Modified date.
6307         return if ($cgi->request_method() eq 'HEAD');
6308
6309         # header variables
6310         my $title = "$site_name - $project/$action";
6311         my $feed_type = 'log';
6312         if (defined $hash) {
6313                 $title .= " - '$hash'";
6314                 $feed_type = 'branch log';
6315                 if (defined $file_name) {
6316                         $title .= " :: $file_name";
6317                         $feed_type = 'history';
6318                 }
6319         } elsif (defined $file_name) {
6320                 $title .= " - $file_name";
6321                 $feed_type = 'history';
6322         }
6323         $title .= " $feed_type";
6324         my $descr = git_get_project_description($project);
6325         if (defined $descr) {
6326                 $descr = esc_html($descr);
6327         } else {
6328                 $descr = "$project " .
6329                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6330                          " feed";
6331         }
6332         my $owner = git_get_project_owner($project);
6333         $owner = esc_html($owner);
6334
6335         #header
6336         my $alt_url;
6337         if (defined $file_name) {
6338                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6339         } elsif (defined $hash) {
6340                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6341         } else {
6342                 $alt_url = href(-full=>1, action=>"summary");
6343         }
6344         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6345         if ($format eq 'rss') {
6346                 print <<XML;
6347 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6348 <channel>
6349 XML
6350                 print "<title>$title</title>\n" .
6351                       "<link>$alt_url</link>\n" .
6352                       "<description>$descr</description>\n" .
6353                       "<language>en</language>\n" .
6354                       # project owner is responsible for 'editorial' content
6355                       "<managingEditor>$owner</managingEditor>\n";
6356                 if (defined $logo || defined $favicon) {
6357                         # prefer the logo to the favicon, since RSS
6358                         # doesn't allow both
6359                         my $img = esc_url($logo || $favicon);
6360                         print "<image>\n" .
6361                               "<url>$img</url>\n" .
6362                               "<title>$title</title>\n" .
6363                               "<link>$alt_url</link>\n" .
6364                               "</image>\n";
6365                 }
6366                 if (%latest_date) {
6367                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6368                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6369                 }
6370                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6371         } elsif ($format eq 'atom') {
6372                 print <<XML;
6373 <feed xmlns="http://www.w3.org/2005/Atom">
6374 XML
6375                 print "<title>$title</title>\n" .
6376                       "<subtitle>$descr</subtitle>\n" .
6377                       '<link rel="alternate" type="text/html" href="' .
6378                       $alt_url . '" />' . "\n" .
6379                       '<link rel="self" type="' . $content_type . '" href="' .
6380                       $cgi->self_url() . '" />' . "\n" .
6381                       "<id>" . href(-full=>1) . "</id>\n" .
6382                       # use project owner for feed author
6383                       "<author><name>$owner</name></author>\n";
6384                 if (defined $favicon) {
6385                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6386                 }
6387                 if (defined $logo_url) {
6388                         # not twice as wide as tall: 72 x 27 pixels
6389                         print "<logo>" . esc_url($logo) . "</logo>\n";
6390                 }
6391                 if (! %latest_date) {
6392                         # dummy date to keep the feed valid until commits trickle in:
6393                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6394                 } else {
6395                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6396                 }
6397                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6398         }
6399
6400         # contents
6401         for (my $i = 0; $i <= $#commitlist; $i++) {
6402                 my %co = %{$commitlist[$i]};
6403                 my $commit = $co{'id'};
6404                 # we read 150, we always show 30 and the ones more recent than 48 hours
6405                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6406                         last;
6407                 }
6408                 my %cd = parse_date($co{'author_epoch'});
6409
6410                 # get list of changed files
6411                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6412                         $co{'parent'} || "--root",
6413                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6414                         or next;
6415                 my @difftree = map { chomp; $_ } <$fd>;
6416                 close $fd
6417                         or next;
6418
6419                 # print element (entry, item)
6420                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6421                 if ($format eq 'rss') {
6422                         print "<item>\n" .
6423                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6424                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6425                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6426                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6427                               "<link>$co_url</link>\n" .
6428                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6429                               "<content:encoded>" .
6430                               "<![CDATA[\n";
6431                 } elsif ($format eq 'atom') {
6432                         print "<entry>\n" .
6433                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6434                               "<updated>$cd{'iso-8601'}</updated>\n" .
6435                               "<author>\n" .
6436                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6437                         if ($co{'author_email'}) {
6438                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6439                         }
6440                         print "</author>\n" .
6441                               # use committer for contributor
6442                               "<contributor>\n" .
6443                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6444                         if ($co{'committer_email'}) {
6445                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6446                         }
6447                         print "</contributor>\n" .
6448                               "<published>$cd{'iso-8601'}</published>\n" .
6449                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6450                               "<id>$co_url</id>\n" .
6451                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6452                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6453                 }
6454                 my $comment = $co{'comment'};
6455                 print "<pre>\n";
6456                 foreach my $line (@$comment) {
6457                         $line = esc_html($line);
6458                         print "$line\n";
6459                 }
6460                 print "</pre><ul>\n";
6461                 foreach my $difftree_line (@difftree) {
6462                         my %difftree = parse_difftree_raw_line($difftree_line);
6463                         next if !$difftree{'from_id'};
6464
6465                         my $file = $difftree{'file'} || $difftree{'to_file'};
6466
6467                         print "<li>" .
6468                               "[" .
6469                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6470                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6471                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6472                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6473                                       -title => "diff"}, 'D');
6474                         if ($have_blame) {
6475                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6476                                                              file_name=>$file, hash_base=>$commit),
6477                                               -title => "blame"}, 'B');
6478                         }
6479                         # if this is not a feed of a file history
6480                         if (!defined $file_name || $file_name ne $file) {
6481                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6482                                                              file_name=>$file, hash=>$commit),
6483                                               -title => "history"}, 'H');
6484                         }
6485                         $file = esc_path($file);
6486                         print "] ".
6487                               "$file</li>\n";
6488                 }
6489                 if ($format eq 'rss') {
6490                         print "</ul>]]>\n" .
6491                               "</content:encoded>\n" .
6492                               "</item>\n";
6493                 } elsif ($format eq 'atom') {
6494                         print "</ul>\n</div>\n" .
6495                               "</content>\n" .
6496                               "</entry>\n";
6497                 }
6498         }
6499
6500         # end of feed
6501         if ($format eq 'rss') {
6502                 print "</channel>\n</rss>\n";
6503         } elsif ($format eq 'atom') {
6504                 print "</feed>\n";
6505         }
6506 }
6507
6508 sub git_rss {
6509         git_feed('rss');
6510 }
6511
6512 sub git_atom {
6513         git_feed('atom');
6514 }
6515
6516 sub git_opml {
6517         my @list = git_get_projects_list();
6518
6519         print $cgi->header(
6520                 -type => 'text/xml',
6521                 -charset => 'utf-8',
6522                 -content_disposition => 'inline; filename="opml.xml"');
6523
6524         print <<XML;
6525 <?xml version="1.0" encoding="utf-8"?>
6526 <opml version="1.0">
6527 <head>
6528   <title>$site_name OPML Export</title>
6529 </head>
6530 <body>
6531 <outline text="git RSS feeds">
6532 XML
6533
6534         foreach my $pr (@list) {
6535                 my %proj = %$pr;
6536                 my $head = git_get_head_hash($proj{'path'});
6537                 if (!defined $head) {
6538                         next;
6539                 }
6540                 $git_dir = "$projectroot/$proj{'path'}";
6541                 my %co = parse_commit($head);
6542                 if (!%co) {
6543                         next;
6544                 }
6545
6546                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6547                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6548                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6549                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6550         }
6551         print <<XML;
6552 </outline>
6553 </body>
6554 </opml>
6555 XML
6556 }