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\-_.~()\/:@ ]+)/CGI::escape($1)/eg;
1087         $str =~ s/ /\+/g;
1088         return $str;
1089 }
1090
1091 # quote unsafe chars in whole URL, so some charactrs cannot be quoted
1092 sub esc_url {
1093         my $str = shift;
1094         $str =~ s/([^A-Za-z0-9\-_.~();\/;?:@&=])/sprintf("%%%02X", ord($1))/eg;
1095         $str =~ s/\+/%2B/g;
1096         $str =~ s/ /\+/g;
1097         return $str;
1098 }
1099
1100 # quote unsafe characters in HTML attributes
1101 sub esc_attr {
1102
1103         # for XHTML conformance escaping '"' to '&quot;' is not enough
1104         return esc_html(@_);
1105 }
1106
1107 # replace invalid utf8 character with SUBSTITUTION sequence
1108 sub esc_html {
1109         my $str = shift;
1110         my %opts = @_;
1111
1112         $str = to_utf8($str);
1113         $str = $cgi->escapeHTML($str);
1114         if ($opts{'-nbsp'}) {
1115                 $str =~ s/ /&nbsp;/g;
1116         }
1117         $str =~ s|([[:cntrl:]])|(($1 ne "\t") ? quot_cec($1) : $1)|eg;
1118         return $str;
1119 }
1120
1121 # quote control characters and escape filename to HTML
1122 sub esc_path {
1123         my $str = shift;
1124         my %opts = @_;
1125
1126         $str = to_utf8($str);
1127         $str = $cgi->escapeHTML($str);
1128         if ($opts{'-nbsp'}) {
1129                 $str =~ s/ /&nbsp;/g;
1130         }
1131         $str =~ s|([[:cntrl:]])|quot_cec($1)|eg;
1132         return $str;
1133 }
1134
1135 # Make control characters "printable", using character escape codes (CEC)
1136 sub quot_cec {
1137         my $cntrl = shift;
1138         my %opts = @_;
1139         my %es = ( # character escape codes, aka escape sequences
1140                 "\t" => '\t',   # tab            (HT)
1141                 "\n" => '\n',   # line feed      (LF)
1142                 "\r" => '\r',   # carrige return (CR)
1143                 "\f" => '\f',   # form feed      (FF)
1144                 "\b" => '\b',   # backspace      (BS)
1145                 "\a" => '\a',   # alarm (bell)   (BEL)
1146                 "\e" => '\e',   # escape         (ESC)
1147                 "\013" => '\v', # vertical tab   (VT)
1148                 "\000" => '\0', # nul character  (NUL)
1149         );
1150         my $chr = ( (exists $es{$cntrl})
1151                     ? $es{$cntrl}
1152                     : sprintf('\%2x', ord($cntrl)) );
1153         if ($opts{-nohtml}) {
1154                 return $chr;
1155         } else {
1156                 return "<span class=\"cntrl\">$chr</span>";
1157         }
1158 }
1159
1160 # Alternatively use unicode control pictures codepoints,
1161 # Unicode "printable representation" (PR)
1162 sub quot_upr {
1163         my $cntrl = shift;
1164         my %opts = @_;
1165
1166         my $chr = sprintf('&#%04d;', 0x2400+ord($cntrl));
1167         if ($opts{-nohtml}) {
1168                 return $chr;
1169         } else {
1170                 return "<span class=\"cntrl\">$chr</span>";
1171         }
1172 }
1173
1174 # git may return quoted and escaped filenames
1175 sub unquote {
1176         my $str = shift;
1177
1178         sub unq {
1179                 my $seq = shift;
1180                 my %es = ( # character escape codes, aka escape sequences
1181                         't' => "\t",   # tab            (HT, TAB)
1182                         'n' => "\n",   # newline        (NL)
1183                         'r' => "\r",   # return         (CR)
1184                         'f' => "\f",   # form feed      (FF)
1185                         'b' => "\b",   # backspace      (BS)
1186                         'a' => "\a",   # alarm (bell)   (BEL)
1187                         'e' => "\e",   # escape         (ESC)
1188                         'v' => "\013", # vertical tab   (VT)
1189                 );
1190
1191                 if ($seq =~ m/^[0-7]{1,3}$/) {
1192                         # octal char sequence
1193                         return chr(oct($seq));
1194                 } elsif (exists $es{$seq}) {
1195                         # C escape sequence, aka character escape code
1196                         return $es{$seq};
1197                 }
1198                 # quoted ordinary character
1199                 return $seq;
1200         }
1201
1202         if ($str =~ m/^"(.*)"$/) {
1203                 # needs unquoting
1204                 $str = $1;
1205                 $str =~ s/\\([^0-7]|[0-7]{1,3})/unq($1)/eg;
1206         }
1207         return $str;
1208 }
1209
1210 # escape tabs (convert tabs to spaces)
1211 sub untabify {
1212         my $line = shift;
1213
1214         while ((my $pos = index($line, "\t")) != -1) {
1215                 if (my $count = (8 - ($pos % 8))) {
1216                         my $spaces = ' ' x $count;
1217                         $line =~ s/\t/$spaces/;
1218                 }
1219         }
1220
1221         return $line;
1222 }
1223
1224 sub project_in_list {
1225         my $project = shift;
1226         my @list = git_get_projects_list();
1227         return @list && scalar(grep { $_->{'path'} eq $project } @list);
1228 }
1229
1230 ## ----------------------------------------------------------------------
1231 ## HTML aware string manipulation
1232
1233 # Try to chop given string on a word boundary between position
1234 # $len and $len+$add_len. If there is no word boundary there,
1235 # chop at $len+$add_len. Do not chop if chopped part plus ellipsis
1236 # (marking chopped part) would be longer than given string.
1237 sub chop_str {
1238         my $str = shift;
1239         my $len = shift;
1240         my $add_len = shift || 10;
1241         my $where = shift || 'right'; # 'left' | 'center' | 'right'
1242
1243         # Make sure perl knows it is utf8 encoded so we don't
1244         # cut in the middle of a utf8 multibyte char.
1245         $str = to_utf8($str);
1246
1247         # allow only $len chars, but don't cut a word if it would fit in $add_len
1248         # if it doesn't fit, cut it if it's still longer than the dots we would add
1249         # remove chopped character entities entirely
1250
1251         # when chopping in the middle, distribute $len into left and right part
1252         # return early if chopping wouldn't make string shorter
1253         if ($where eq 'center') {
1254                 return $str if ($len + 5 >= length($str)); # filler is length 5
1255                 $len = int($len/2);
1256         } else {
1257                 return $str if ($len + 4 >= length($str)); # filler is length 4
1258         }
1259
1260         # regexps: ending and beginning with word part up to $add_len
1261         my $endre = qr/.{$len}\w{0,$add_len}/;
1262         my $begre = qr/\w{0,$add_len}.{$len}/;
1263
1264         if ($where eq 'left') {
1265                 $str =~ m/^(.*?)($begre)$/;
1266                 my ($lead, $body) = ($1, $2);
1267                 if (length($lead) > 4) {
1268                         $body =~ s/^[^;]*;// if ($lead =~ m/&[^;]*$/);
1269                         $lead = " ...";
1270                 }
1271                 return "$lead$body";
1272
1273         } elsif ($where eq 'center') {
1274                 $str =~ m/^($endre)(.*)$/;
1275                 my ($left, $str)  = ($1, $2);
1276                 $str =~ m/^(.*?)($begre)$/;
1277                 my ($mid, $right) = ($1, $2);
1278                 if (length($mid) > 5) {
1279                         $left  =~ s/&[^;]*$//;
1280                         $right =~ s/^[^;]*;// if ($mid =~ m/&[^;]*$/);
1281                         $mid = " ... ";
1282                 }
1283                 return "$left$mid$right";
1284
1285         } else {
1286                 $str =~ m/^($endre)(.*)$/;
1287                 my $body = $1;
1288                 my $tail = $2;
1289                 if (length($tail) > 4) {
1290                         $body =~ s/&[^;]*$//;
1291                         $tail = "... ";
1292                 }
1293                 return "$body$tail";
1294         }
1295 }
1296
1297 # takes the same arguments as chop_str, but also wraps a <span> around the
1298 # result with a title attribute if it does get chopped. Additionally, the
1299 # string is HTML-escaped.
1300 sub chop_and_escape_str {
1301         my ($str) = @_;
1302
1303         my $chopped = chop_str(@_);
1304         if ($chopped eq $str) {
1305                 return esc_html($chopped);
1306         } else {
1307                 $str =~ s/[[:cntrl:]]/?/g;
1308                 return $cgi->span({-title=>$str}, esc_html($chopped));
1309         }
1310 }
1311
1312 ## ----------------------------------------------------------------------
1313 ## functions returning short strings
1314
1315 # CSS class for given age value (in seconds)
1316 sub age_class {
1317         my $age = shift;
1318
1319         if (!defined $age) {
1320                 return "noage";
1321         } elsif ($age < 60*60*2) {
1322                 return "age0";
1323         } elsif ($age < 60*60*24*2) {
1324                 return "age1";
1325         } else {
1326                 return "age2";
1327         }
1328 }
1329
1330 # convert age in seconds to "nn units ago" string
1331 sub age_string {
1332         my $age = shift;
1333         my $age_str;
1334
1335         if ($age > 60*60*24*365*2) {
1336                 $age_str = (int $age/60/60/24/365);
1337                 $age_str .= " years ago";
1338         } elsif ($age > 60*60*24*(365/12)*2) {
1339                 $age_str = int $age/60/60/24/(365/12);
1340                 $age_str .= " months ago";
1341         } elsif ($age > 60*60*24*7*2) {
1342                 $age_str = int $age/60/60/24/7;
1343                 $age_str .= " weeks ago";
1344         } elsif ($age > 60*60*24*2) {
1345                 $age_str = int $age/60/60/24;
1346                 $age_str .= " days ago";
1347         } elsif ($age > 60*60*2) {
1348                 $age_str = int $age/60/60;
1349                 $age_str .= " hours ago";
1350         } elsif ($age > 60*2) {
1351                 $age_str = int $age/60;
1352                 $age_str .= " min ago";
1353         } elsif ($age > 2) {
1354                 $age_str = int $age;
1355                 $age_str .= " sec ago";
1356         } else {
1357                 $age_str .= " right now";
1358         }
1359         return $age_str;
1360 }
1361
1362 use constant {
1363         S_IFINVALID => 0030000,
1364         S_IFGITLINK => 0160000,
1365 };
1366
1367 # submodule/subproject, a commit object reference
1368 sub S_ISGITLINK {
1369         my $mode = shift;
1370
1371         return (($mode & S_IFMT) == S_IFGITLINK)
1372 }
1373
1374 # convert file mode in octal to symbolic file mode string
1375 sub mode_str {
1376         my $mode = oct shift;
1377
1378         if (S_ISGITLINK($mode)) {
1379                 return 'm---------';
1380         } elsif (S_ISDIR($mode & S_IFMT)) {
1381                 return 'drwxr-xr-x';
1382         } elsif (S_ISLNK($mode)) {
1383                 return 'lrwxrwxrwx';
1384         } elsif (S_ISREG($mode)) {
1385                 # git cares only about the executable bit
1386                 if ($mode & S_IXUSR) {
1387                         return '-rwxr-xr-x';
1388                 } else {
1389                         return '-rw-r--r--';
1390                 };
1391         } else {
1392                 return '----------';
1393         }
1394 }
1395
1396 # convert file mode in octal to file type string
1397 sub file_type {
1398         my $mode = shift;
1399
1400         if ($mode !~ m/^[0-7]+$/) {
1401                 return $mode;
1402         } else {
1403                 $mode = oct $mode;
1404         }
1405
1406         if (S_ISGITLINK($mode)) {
1407                 return "submodule";
1408         } elsif (S_ISDIR($mode & S_IFMT)) {
1409                 return "directory";
1410         } elsif (S_ISLNK($mode)) {
1411                 return "symlink";
1412         } elsif (S_ISREG($mode)) {
1413                 return "file";
1414         } else {
1415                 return "unknown";
1416         }
1417 }
1418
1419 # convert file mode in octal to file type description string
1420 sub file_type_long {
1421         my $mode = shift;
1422
1423         if ($mode !~ m/^[0-7]+$/) {
1424                 return $mode;
1425         } else {
1426                 $mode = oct $mode;
1427         }
1428
1429         if (S_ISGITLINK($mode)) {
1430                 return "submodule";
1431         } elsif (S_ISDIR($mode & S_IFMT)) {
1432                 return "directory";
1433         } elsif (S_ISLNK($mode)) {
1434                 return "symlink";
1435         } elsif (S_ISREG($mode)) {
1436                 if ($mode & S_IXUSR) {
1437                         return "executable";
1438                 } else {
1439                         return "file";
1440                 };
1441         } else {
1442                 return "unknown";
1443         }
1444 }
1445
1446
1447 ## ----------------------------------------------------------------------
1448 ## functions returning short HTML fragments, or transforming HTML fragments
1449 ## which don't belong to other sections
1450
1451 # format line of commit message.
1452 sub format_log_line_html {
1453         my $line = shift;
1454
1455         $line = esc_html($line, -nbsp=>1);
1456         $line =~ s{\b([0-9a-fA-F]{8,40})\b}{
1457                 $cgi->a({-href => href(action=>"object", hash=>$1),
1458                                         -class => "text"}, $1);
1459         }eg;
1460
1461         return $line;
1462 }
1463
1464 # format marker of refs pointing to given object
1465
1466 # the destination action is chosen based on object type and current context:
1467 # - for annotated tags, we choose the tag view unless it's the current view
1468 #   already, in which case we go to shortlog view
1469 # - for other refs, we keep the current view if we're in history, shortlog or
1470 #   log view, and select shortlog otherwise
1471 sub format_ref_marker {
1472         my ($refs, $id) = @_;
1473         my $markers = '';
1474
1475         if (defined $refs->{$id}) {
1476                 foreach my $ref (@{$refs->{$id}}) {
1477                         # this code exploits the fact that non-lightweight tags are the
1478                         # only indirect objects, and that they are the only objects for which
1479                         # we want to use tag instead of shortlog as action
1480                         my ($type, $name) = qw();
1481                         my $indirect = ($ref =~ s/\^\{\}$//);
1482                         # e.g. tags/v2.6.11 or heads/next
1483                         if ($ref =~ m!^(.*?)s?/(.*)$!) {
1484                                 $type = $1;
1485                                 $name = $2;
1486                         } else {
1487                                 $type = "ref";
1488                                 $name = $ref;
1489                         }
1490
1491                         my $class = $type;
1492                         $class .= " indirect" if $indirect;
1493
1494                         my $dest_action = "shortlog";
1495
1496                         if ($indirect) {
1497                                 $dest_action = "tag" unless $action eq "tag";
1498                         } elsif ($action =~ /^(history|(short)?log)$/) {
1499                                 $dest_action = $action;
1500                         }
1501
1502                         my $dest = "";
1503                         $dest .= "refs/" unless $ref =~ m!^refs/!;
1504                         $dest .= $ref;
1505
1506                         my $link = $cgi->a({
1507                                 -href => href(
1508                                         action=>$dest_action,
1509                                         hash=>$dest
1510                                 )}, $name);
1511
1512                         $markers .= " <span class=\"".esc_attr($class)."\" title=\"".esc_attr($ref)."\">" .
1513                                 $link . "</span>";
1514                 }
1515         }
1516
1517         if ($markers) {
1518                 return ' <span class="refs">'. $markers . '</span>';
1519         } else {
1520                 return "";
1521         }
1522 }
1523
1524 # format, perhaps shortened and with markers, title line
1525 sub format_subject_html {
1526         my ($long, $short, $href, $extra) = @_;
1527         $extra = '' unless defined($extra);
1528
1529         if (length($short) < length($long)) {
1530                 $long =~ s/[[:cntrl:]]/?/g;
1531                 return $cgi->a({-href => $href, -class => "list subject",
1532                                 -title => to_utf8($long)},
1533                        esc_html($short)) . $extra;
1534         } else {
1535                 return $cgi->a({-href => $href, -class => "list subject"},
1536                        esc_html($long)) . $extra;
1537         }
1538 }
1539
1540 # Rather than recomputing the url for an email multiple times, we cache it
1541 # after the first hit. This gives a visible benefit in views where the avatar
1542 # for the same email is used repeatedly (e.g. shortlog).
1543 # The cache is shared by all avatar engines (currently gravatar only), which
1544 # are free to use it as preferred. Since only one avatar engine is used for any
1545 # given page, there's no risk for cache conflicts.
1546 our %avatar_cache = ();
1547
1548 # Compute the picon url for a given email, by using the picon search service over at
1549 # http://www.cs.indiana.edu/picons/search.html
1550 sub picon_url {
1551         my $email = lc shift;
1552         if (!$avatar_cache{$email}) {
1553                 my ($user, $domain) = split('@', $email);
1554                 $avatar_cache{$email} =
1555                         "http://www.cs.indiana.edu/cgi-pub/kinzler/piconsearch.cgi/" .
1556                         "$domain/$user/" .
1557                         "users+domains+unknown/up/single";
1558         }
1559         return $avatar_cache{$email};
1560 }
1561
1562 # Compute the gravatar url for a given email, if it's not in the cache already.
1563 # Gravatar stores only the part of the URL before the size, since that's the
1564 # one computationally more expensive. This also allows reuse of the cache for
1565 # different sizes (for this particular engine).
1566 sub gravatar_url {
1567         my $email = lc shift;
1568         my $size = shift;
1569         $avatar_cache{$email} ||=
1570                 "http://www.gravatar.com/avatar/" .
1571                         Digest::MD5::md5_hex($email) . "?s=";
1572         return $avatar_cache{$email} . $size;
1573 }
1574
1575 # Insert an avatar for the given $email at the given $size if the feature
1576 # is enabled.
1577 sub git_get_avatar {
1578         my ($email, %opts) = @_;
1579         my $pre_white  = ($opts{-pad_before} ? "&nbsp;" : "");
1580         my $post_white = ($opts{-pad_after}  ? "&nbsp;" : "");
1581         $opts{-size} ||= 'default';
1582         my $size = $avatar_size{$opts{-size}} || $avatar_size{'default'};
1583         my $url = "";
1584         if ($git_avatar eq 'gravatar') {
1585                 $url = gravatar_url($email, $size);
1586         } elsif ($git_avatar eq 'picon') {
1587                 $url = picon_url($email);
1588         }
1589         # Other providers can be added by extending the if chain, defining $url
1590         # as needed. If no variant puts something in $url, we assume avatars
1591         # are completely disabled/unavailable.
1592         if ($url) {
1593                 return $pre_white .
1594                        "<img width=\"$size\" " .
1595                             "class=\"avatar\" " .
1596                             "src=\"".esc_url($url)."\" " .
1597                             "alt=\"\" " .
1598                        "/>" . $post_white;
1599         } else {
1600                 return "";
1601         }
1602 }
1603
1604 # format the author name of the given commit with the given tag
1605 # the author name is chopped and escaped according to the other
1606 # optional parameters (see chop_str).
1607 sub format_author_html {
1608         my $tag = shift;
1609         my $co = shift;
1610         my $author = chop_and_escape_str($co->{'author_name'}, @_);
1611         return "<$tag class=\"author\">" .
1612                git_get_avatar($co->{'author_email'}, -pad_after => 1) .
1613                $author . "</$tag>";
1614 }
1615
1616 # format git diff header line, i.e. "diff --(git|combined|cc) ..."
1617 sub format_git_diff_header_line {
1618         my $line = shift;
1619         my $diffinfo = shift;
1620         my ($from, $to) = @_;
1621
1622         if ($diffinfo->{'nparents'}) {
1623                 # combined diff
1624                 $line =~ s!^(diff (.*?) )"?.*$!$1!;
1625                 if ($to->{'href'}) {
1626                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1627                                          esc_path($to->{'file'}));
1628                 } else { # file was deleted (no href)
1629                         $line .= esc_path($to->{'file'});
1630                 }
1631         } else {
1632                 # "ordinary" diff
1633                 $line =~ s!^(diff (.*?) )"?a/.*$!$1!;
1634                 if ($from->{'href'}) {
1635                         $line .= $cgi->a({-href => $from->{'href'}, -class => "path"},
1636                                          'a/' . esc_path($from->{'file'}));
1637                 } else { # file was added (no href)
1638                         $line .= 'a/' . esc_path($from->{'file'});
1639                 }
1640                 $line .= ' ';
1641                 if ($to->{'href'}) {
1642                         $line .= $cgi->a({-href => $to->{'href'}, -class => "path"},
1643                                          'b/' . esc_path($to->{'file'}));
1644                 } else { # file was deleted
1645                         $line .= 'b/' . esc_path($to->{'file'});
1646                 }
1647         }
1648
1649         return "<div class=\"diff header\">$line</div>\n";
1650 }
1651
1652 # format extended diff header line, before patch itself
1653 sub format_extended_diff_header_line {
1654         my $line = shift;
1655         my $diffinfo = shift;
1656         my ($from, $to) = @_;
1657
1658         # match <path>
1659         if ($line =~ s!^((copy|rename) from ).*$!$1! && $from->{'href'}) {
1660                 $line .= $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1661                                        esc_path($from->{'file'}));
1662         }
1663         if ($line =~ s!^((copy|rename) to ).*$!$1! && $to->{'href'}) {
1664                 $line .= $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1665                                  esc_path($to->{'file'}));
1666         }
1667         # match single <mode>
1668         if ($line =~ m/\s(\d{6})$/) {
1669                 $line .= '<span class="info"> (' .
1670                          file_type_long($1) .
1671                          ')</span>';
1672         }
1673         # match <hash>
1674         if ($line =~ m/^index [0-9a-fA-F]{40},[0-9a-fA-F]{40}/) {
1675                 # can match only for combined diff
1676                 $line = 'index ';
1677                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1678                         if ($from->{'href'}[$i]) {
1679                                 $line .= $cgi->a({-href=>$from->{'href'}[$i],
1680                                                   -class=>"hash"},
1681                                                  substr($diffinfo->{'from_id'}[$i],0,7));
1682                         } else {
1683                                 $line .= '0' x 7;
1684                         }
1685                         # separator
1686                         $line .= ',' if ($i < $diffinfo->{'nparents'} - 1);
1687                 }
1688                 $line .= '..';
1689                 if ($to->{'href'}) {
1690                         $line .= $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1691                                          substr($diffinfo->{'to_id'},0,7));
1692                 } else {
1693                         $line .= '0' x 7;
1694                 }
1695
1696         } elsif ($line =~ m/^index [0-9a-fA-F]{40}..[0-9a-fA-F]{40}/) {
1697                 # can match only for ordinary diff
1698                 my ($from_link, $to_link);
1699                 if ($from->{'href'}) {
1700                         $from_link = $cgi->a({-href=>$from->{'href'}, -class=>"hash"},
1701                                              substr($diffinfo->{'from_id'},0,7));
1702                 } else {
1703                         $from_link = '0' x 7;
1704                 }
1705                 if ($to->{'href'}) {
1706                         $to_link = $cgi->a({-href=>$to->{'href'}, -class=>"hash"},
1707                                            substr($diffinfo->{'to_id'},0,7));
1708                 } else {
1709                         $to_link = '0' x 7;
1710                 }
1711                 my ($from_id, $to_id) = ($diffinfo->{'from_id'}, $diffinfo->{'to_id'});
1712                 $line =~ s!$from_id\.\.$to_id!$from_link..$to_link!;
1713         }
1714
1715         return $line . "<br/>\n";
1716 }
1717
1718 # format from-file/to-file diff header
1719 sub format_diff_from_to_header {
1720         my ($from_line, $to_line, $diffinfo, $from, $to, @parents) = @_;
1721         my $line;
1722         my $result = '';
1723
1724         $line = $from_line;
1725         #assert($line =~ m/^---/) if DEBUG;
1726         # no extra formatting for "^--- /dev/null"
1727         if (! $diffinfo->{'nparents'}) {
1728                 # ordinary (single parent) diff
1729                 if ($line =~ m!^--- "?a/!) {
1730                         if ($from->{'href'}) {
1731                                 $line = '--- a/' .
1732                                         $cgi->a({-href=>$from->{'href'}, -class=>"path"},
1733                                                 esc_path($from->{'file'}));
1734                         } else {
1735                                 $line = '--- a/' .
1736                                         esc_path($from->{'file'});
1737                         }
1738                 }
1739                 $result .= qq!<div class="diff from_file">$line</div>\n!;
1740
1741         } else {
1742                 # combined diff (merge commit)
1743                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
1744                         if ($from->{'href'}[$i]) {
1745                                 $line = '--- ' .
1746                                         $cgi->a({-href=>href(action=>"blobdiff",
1747                                                              hash_parent=>$diffinfo->{'from_id'}[$i],
1748                                                              hash_parent_base=>$parents[$i],
1749                                                              file_parent=>$from->{'file'}[$i],
1750                                                              hash=>$diffinfo->{'to_id'},
1751                                                              hash_base=>$hash,
1752                                                              file_name=>$to->{'file'}),
1753                                                  -class=>"path",
1754                                                  -title=>"diff" . ($i+1)},
1755                                                 $i+1) .
1756                                         '/' .
1757                                         $cgi->a({-href=>$from->{'href'}[$i], -class=>"path"},
1758                                                 esc_path($from->{'file'}[$i]));
1759                         } else {
1760                                 $line = '--- /dev/null';
1761                         }
1762                         $result .= qq!<div class="diff from_file">$line</div>\n!;
1763                 }
1764         }
1765
1766         $line = $to_line;
1767         #assert($line =~ m/^\+\+\+/) if DEBUG;
1768         # no extra formatting for "^+++ /dev/null"
1769         if ($line =~ m!^\+\+\+ "?b/!) {
1770                 if ($to->{'href'}) {
1771                         $line = '+++ b/' .
1772                                 $cgi->a({-href=>$to->{'href'}, -class=>"path"},
1773                                         esc_path($to->{'file'}));
1774                 } else {
1775                         $line = '+++ b/' .
1776                                 esc_path($to->{'file'});
1777                 }
1778         }
1779         $result .= qq!<div class="diff to_file">$line</div>\n!;
1780
1781         return $result;
1782 }
1783
1784 # create note for patch simplified by combined diff
1785 sub format_diff_cc_simplified {
1786         my ($diffinfo, @parents) = @_;
1787         my $result = '';
1788
1789         $result .= "<div class=\"diff header\">" .
1790                    "diff --cc ";
1791         if (!is_deleted($diffinfo)) {
1792                 $result .= $cgi->a({-href => href(action=>"blob",
1793                                                   hash_base=>$hash,
1794                                                   hash=>$diffinfo->{'to_id'},
1795                                                   file_name=>$diffinfo->{'to_file'}),
1796                                     -class => "path"},
1797                                    esc_path($diffinfo->{'to_file'}));
1798         } else {
1799                 $result .= esc_path($diffinfo->{'to_file'});
1800         }
1801         $result .= "</div>\n" . # class="diff header"
1802                    "<div class=\"diff nodifferences\">" .
1803                    "Simple merge" .
1804                    "</div>\n"; # class="diff nodifferences"
1805
1806         return $result;
1807 }
1808
1809 # format patch (diff) line (not to be used for diff headers)
1810 sub format_diff_line {
1811         my $line = shift;
1812         my ($from, $to) = @_;
1813         my $diff_class = "";
1814
1815         chomp $line;
1816
1817         if ($from && $to && ref($from->{'href'}) eq "ARRAY") {
1818                 # combined diff
1819                 my $prefix = substr($line, 0, scalar @{$from->{'href'}});
1820                 if ($line =~ m/^\@{3}/) {
1821                         $diff_class = " chunk_header";
1822                 } elsif ($line =~ m/^\\/) {
1823                         $diff_class = " incomplete";
1824                 } elsif ($prefix =~ tr/+/+/) {
1825                         $diff_class = " add";
1826                 } elsif ($prefix =~ tr/-/-/) {
1827                         $diff_class = " rem";
1828                 }
1829         } else {
1830                 # assume ordinary diff
1831                 my $char = substr($line, 0, 1);
1832                 if ($char eq '+') {
1833                         $diff_class = " add";
1834                 } elsif ($char eq '-') {
1835                         $diff_class = " rem";
1836                 } elsif ($char eq '@') {
1837                         $diff_class = " chunk_header";
1838                 } elsif ($char eq "\\") {
1839                         $diff_class = " incomplete";
1840                 }
1841         }
1842         $line = untabify($line);
1843         if ($from && $to && $line =~ m/^\@{2} /) {
1844                 my ($from_text, $from_start, $from_lines, $to_text, $to_start, $to_lines, $section) =
1845                         $line =~ m/^\@{2} (-(\d+)(?:,(\d+))?) (\+(\d+)(?:,(\d+))?) \@{2}(.*)$/;
1846
1847                 $from_lines = 0 unless defined $from_lines;
1848                 $to_lines   = 0 unless defined $to_lines;
1849
1850                 if ($from->{'href'}) {
1851                         $from_text = $cgi->a({-href=>"$from->{'href'}#l$from_start",
1852                                              -class=>"list"}, $from_text);
1853                 }
1854                 if ($to->{'href'}) {
1855                         $to_text   = $cgi->a({-href=>"$to->{'href'}#l$to_start",
1856                                              -class=>"list"}, $to_text);
1857                 }
1858                 $line = "<span class=\"chunk_info\">@@ $from_text $to_text @@</span>" .
1859                         "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1860                 return "<div class=\"diff$diff_class\">$line</div>\n";
1861         } elsif ($from && $to && $line =~ m/^\@{3}/) {
1862                 my ($prefix, $ranges, $section) = $line =~ m/^(\@+) (.*?) \@+(.*)$/;
1863                 my (@from_text, @from_start, @from_nlines, $to_text, $to_start, $to_nlines);
1864
1865                 @from_text = split(' ', $ranges);
1866                 for (my $i = 0; $i < @from_text; ++$i) {
1867                         ($from_start[$i], $from_nlines[$i]) =
1868                                 (split(',', substr($from_text[$i], 1)), 0);
1869                 }
1870
1871                 $to_text   = pop @from_text;
1872                 $to_start  = pop @from_start;
1873                 $to_nlines = pop @from_nlines;
1874
1875                 $line = "<span class=\"chunk_info\">$prefix ";
1876                 for (my $i = 0; $i < @from_text; ++$i) {
1877                         if ($from->{'href'}[$i]) {
1878                                 $line .= $cgi->a({-href=>"$from->{'href'}[$i]#l$from_start[$i]",
1879                                                   -class=>"list"}, $from_text[$i]);
1880                         } else {
1881                                 $line .= $from_text[$i];
1882                         }
1883                         $line .= " ";
1884                 }
1885                 if ($to->{'href'}) {
1886                         $line .= $cgi->a({-href=>"$to->{'href'}#l$to_start",
1887                                           -class=>"list"}, $to_text);
1888                 } else {
1889                         $line .= $to_text;
1890                 }
1891                 $line .= " $prefix</span>" .
1892                          "<span class=\"section\">" . esc_html($section, -nbsp=>1) . "</span>";
1893                 return "<div class=\"diff$diff_class\">$line</div>\n";
1894         }
1895         return "<div class=\"diff$diff_class\">" . esc_html($line, -nbsp=>1) . "</div>\n";
1896 }
1897
1898 # Generates undef or something like "_snapshot_" or "snapshot (_tbz2_ _zip_)",
1899 # linked.  Pass the hash of the tree/commit to snapshot.
1900 sub format_snapshot_links {
1901         my ($hash) = @_;
1902         my $num_fmts = @snapshot_fmts;
1903         if ($num_fmts > 1) {
1904                 # A parenthesized list of links bearing format names.
1905                 # e.g. "snapshot (_tar.gz_ _zip_)"
1906                 return "snapshot (" . join(' ', map
1907                         $cgi->a({
1908                                 -href => href(
1909                                         action=>"snapshot",
1910                                         hash=>$hash,
1911                                         snapshot_format=>$_
1912                                 )
1913                         }, $known_snapshot_formats{$_}{'display'})
1914                 , @snapshot_fmts) . ")";
1915         } elsif ($num_fmts == 1) {
1916                 # A single "snapshot" link whose tooltip bears the format name.
1917                 # i.e. "_snapshot_"
1918                 my ($fmt) = @snapshot_fmts;
1919                 return
1920                         $cgi->a({
1921                                 -href => href(
1922                                         action=>"snapshot",
1923                                         hash=>$hash,
1924                                         snapshot_format=>$fmt
1925                                 ),
1926                                 -title => "in format: $known_snapshot_formats{$fmt}{'display'}"
1927                         }, "snapshot");
1928         } else { # $num_fmts == 0
1929                 return undef;
1930         }
1931 }
1932
1933 ## ......................................................................
1934 ## functions returning values to be passed, perhaps after some
1935 ## transformation, to other functions; e.g. returning arguments to href()
1936
1937 # returns hash to be passed to href to generate gitweb URL
1938 # in -title key it returns description of link
1939 sub get_feed_info {
1940         my $format = shift || 'Atom';
1941         my %res = (action => lc($format));
1942
1943         # feed links are possible only for project views
1944         return unless (defined $project);
1945         # some views should link to OPML, or to generic project feed,
1946         # or don't have specific feed yet (so they should use generic)
1947         return if ($action =~ /^(?:tags|heads|forks|tag|search)$/x);
1948
1949         my $branch;
1950         # branches refs uses 'refs/heads/' prefix (fullname) to differentiate
1951         # from tag links; this also makes possible to detect branch links
1952         if ((defined $hash_base && $hash_base =~ m!^refs/heads/(.*)$!) ||
1953             (defined $hash      && $hash      =~ m!^refs/heads/(.*)$!)) {
1954                 $branch = $1;
1955         }
1956         # find log type for feed description (title)
1957         my $type = 'log';
1958         if (defined $file_name) {
1959                 $type  = "history of $file_name";
1960                 $type .= "/" if ($action eq 'tree');
1961                 $type .= " on '$branch'" if (defined $branch);
1962         } else {
1963                 $type = "log of $branch" if (defined $branch);
1964         }
1965
1966         $res{-title} = $type;
1967         $res{'hash'} = (defined $branch ? "refs/heads/$branch" : undef);
1968         $res{'file_name'} = $file_name;
1969
1970         return %res;
1971 }
1972
1973 ## ----------------------------------------------------------------------
1974 ## git utility subroutines, invoking git commands
1975
1976 # returns path to the core git executable and the --git-dir parameter as list
1977 sub git_cmd {
1978         return $GIT, '--git-dir='.$git_dir;
1979 }
1980
1981 # quote the given arguments for passing them to the shell
1982 # quote_command("command", "arg 1", "arg with ' and ! characters")
1983 # => "'command' 'arg 1' 'arg with '\'' and '\!' characters'"
1984 # Try to avoid using this function wherever possible.
1985 sub quote_command {
1986         return join(' ',
1987                 map { my $a = $_; $a =~ s/(['!])/'\\$1'/g; "'$a'" } @_ );
1988 }
1989
1990 # get HEAD ref of given project as hash
1991 sub git_get_head_hash {
1992         my $project = shift;
1993         my $o_git_dir = $git_dir;
1994         my $retval = undef;
1995         $git_dir = "$projectroot/$project";
1996         if (open my $fd, "-|", git_cmd(), "rev-parse", "--verify", "HEAD") {
1997                 my $head = <$fd>;
1998                 close $fd;
1999                 if (defined $head && $head =~ /^([0-9a-fA-F]{40})$/) {
2000                         $retval = $1;
2001                 }
2002         }
2003         if (defined $o_git_dir) {
2004                 $git_dir = $o_git_dir;
2005         }
2006         return $retval;
2007 }
2008
2009 # get type of given object
2010 sub git_get_type {
2011         my $hash = shift;
2012
2013         open my $fd, "-|", git_cmd(), "cat-file", '-t', $hash or return;
2014         my $type = <$fd>;
2015         close $fd or return;
2016         chomp $type;
2017         return $type;
2018 }
2019
2020 # repository configuration
2021 our $config_file = '';
2022 our %config;
2023
2024 # store multiple values for single key as anonymous array reference
2025 # single values stored directly in the hash, not as [ <value> ]
2026 sub hash_set_multi {
2027         my ($hash, $key, $value) = @_;
2028
2029         if (!exists $hash->{$key}) {
2030                 $hash->{$key} = $value;
2031         } elsif (!ref $hash->{$key}) {
2032                 $hash->{$key} = [ $hash->{$key}, $value ];
2033         } else {
2034                 push @{$hash->{$key}}, $value;
2035         }
2036 }
2037
2038 # return hash of git project configuration
2039 # optionally limited to some section, e.g. 'gitweb'
2040 sub git_parse_project_config {
2041         my $section_regexp = shift;
2042         my %config;
2043
2044         local $/ = "\0";
2045
2046         open my $fh, "-|", git_cmd(), "config", '-z', '-l',
2047                 or return;
2048
2049         while (my $keyval = <$fh>) {
2050                 chomp $keyval;
2051                 my ($key, $value) = split(/\n/, $keyval, 2);
2052
2053                 hash_set_multi(\%config, $key, $value)
2054                         if (!defined $section_regexp || $key =~ /^(?:$section_regexp)\./o);
2055         }
2056         close $fh;
2057
2058         return %config;
2059 }
2060
2061 # convert config value to boolean: 'true' or 'false'
2062 # no value, number > 0, 'true' and 'yes' values are true
2063 # rest of values are treated as false (never as error)
2064 sub config_to_bool {
2065         my $val = shift;
2066
2067         return 1 if !defined $val;             # section.key
2068
2069         # strip leading and trailing whitespace
2070         $val =~ s/^\s+//;
2071         $val =~ s/\s+$//;
2072
2073         return (($val =~ /^\d+$/ && $val) ||   # section.key = 1
2074                 ($val =~ /^(?:true|yes)$/i));  # section.key = true
2075 }
2076
2077 # convert config value to simple decimal number
2078 # an optional value suffix of 'k', 'm', or 'g' will cause the value
2079 # to be multiplied by 1024, 1048576, or 1073741824
2080 sub config_to_int {
2081         my $val = shift;
2082
2083         # strip leading and trailing whitespace
2084         $val =~ s/^\s+//;
2085         $val =~ s/\s+$//;
2086
2087         if (my ($num, $unit) = ($val =~ /^([0-9]*)([kmg])$/i)) {
2088                 $unit = lc($unit);
2089                 # unknown unit is treated as 1
2090                 return $num * ($unit eq 'g' ? 1073741824 :
2091                                $unit eq 'm' ?    1048576 :
2092                                $unit eq 'k' ?       1024 : 1);
2093         }
2094         return $val;
2095 }
2096
2097 # convert config value to array reference, if needed
2098 sub config_to_multi {
2099         my $val = shift;
2100
2101         return ref($val) ? $val : (defined($val) ? [ $val ] : []);
2102 }
2103
2104 sub git_get_project_config {
2105         my ($key, $type) = @_;
2106
2107         # key sanity check
2108         return unless ($key);
2109         $key =~ s/^gitweb\.//;
2110         return if ($key =~ m/\W/);
2111
2112         # type sanity check
2113         if (defined $type) {
2114                 $type =~ s/^--//;
2115                 $type = undef
2116                         unless ($type eq 'bool' || $type eq 'int');
2117         }
2118
2119         # get config
2120         if (!defined $config_file ||
2121             $config_file ne "$git_dir/config") {
2122                 %config = git_parse_project_config('gitweb');
2123                 $config_file = "$git_dir/config";
2124         }
2125
2126         # check if config variable (key) exists
2127         return unless exists $config{"gitweb.$key"};
2128
2129         # ensure given type
2130         if (!defined $type) {
2131                 return $config{"gitweb.$key"};
2132         } elsif ($type eq 'bool') {
2133                 # backward compatibility: 'git config --bool' returns true/false
2134                 return config_to_bool($config{"gitweb.$key"}) ? 'true' : 'false';
2135         } elsif ($type eq 'int') {
2136                 return config_to_int($config{"gitweb.$key"});
2137         }
2138         return $config{"gitweb.$key"};
2139 }
2140
2141 # get hash of given path at given ref
2142 sub git_get_hash_by_path {
2143         my $base = shift;
2144         my $path = shift || return undef;
2145         my $type = shift;
2146
2147         $path =~ s,/+$,,;
2148
2149         open my $fd, "-|", git_cmd(), "ls-tree", $base, "--", $path
2150                 or die_error(500, "Open git-ls-tree failed");
2151         my $line = <$fd>;
2152         close $fd or return undef;
2153
2154         if (!defined $line) {
2155                 # there is no tree or hash given by $path at $base
2156                 return undef;
2157         }
2158
2159         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2160         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/;
2161         if (defined $type && $type ne $2) {
2162                 # type doesn't match
2163                 return undef;
2164         }
2165         return $3;
2166 }
2167
2168 # get path of entry with given hash at given tree-ish (ref)
2169 # used to get 'from' filename for combined diff (merge commit) for renames
2170 sub git_get_path_by_hash {
2171         my $base = shift || return;
2172         my $hash = shift || return;
2173
2174         local $/ = "\0";
2175
2176         open my $fd, "-|", git_cmd(), "ls-tree", '-r', '-t', '-z', $base
2177                 or return undef;
2178         while (my $line = <$fd>) {
2179                 chomp $line;
2180
2181                 #'040000 tree 595596a6a9117ddba9fe379b6b012b558bac8423  gitweb'
2182                 #'100644 blob e02e90f0429be0d2a69b76571101f20b8f75530f  gitweb/README'
2183                 if ($line =~ m/(?:[0-9]+) (?:.+) $hash\t(.+)$/) {
2184                         close $fd;
2185                         return $1;
2186                 }
2187         }
2188         close $fd;
2189         return undef;
2190 }
2191
2192 ## ......................................................................
2193 ## git utility functions, directly accessing git repository
2194
2195 sub git_get_project_description {
2196         my $path = shift;
2197
2198         $git_dir = "$projectroot/$path";
2199         open my $fd, '<', "$git_dir/description"
2200                 or return git_get_project_config('description');
2201         my $descr = <$fd>;
2202         close $fd;
2203         if (defined $descr) {
2204                 chomp $descr;
2205         }
2206         return $descr;
2207 }
2208
2209 sub git_get_project_ctags {
2210         my $path = shift;
2211         my $ctags = {};
2212
2213         $git_dir = "$projectroot/$path";
2214         opendir my $dh, "$git_dir/ctags"
2215                 or return $ctags;
2216         foreach (grep { -f $_ } map { "$git_dir/ctags/$_" } readdir($dh)) {
2217                 open my $ct, '<', $_ or next;
2218                 my $val = <$ct>;
2219                 chomp $val;
2220                 close $ct;
2221                 my $ctag = $_; $ctag =~ s#.*/##;
2222                 $ctags->{$ctag} = $val;
2223         }
2224         closedir $dh;
2225         $ctags;
2226 }
2227
2228 sub git_populate_project_tagcloud {
2229         my $ctags = shift;
2230
2231         # First, merge different-cased tags; tags vote on casing
2232         my %ctags_lc;
2233         foreach (keys %$ctags) {
2234                 $ctags_lc{lc $_}->{count} += $ctags->{$_};
2235                 if (not $ctags_lc{lc $_}->{topcount}
2236                     or $ctags_lc{lc $_}->{topcount} < $ctags->{$_}) {
2237                         $ctags_lc{lc $_}->{topcount} = $ctags->{$_};
2238                         $ctags_lc{lc $_}->{topname} = $_;
2239                 }
2240         }
2241
2242         my $cloud;
2243         if (eval { require HTML::TagCloud; 1; }) {
2244                 $cloud = HTML::TagCloud->new;
2245                 foreach (sort keys %ctags_lc) {
2246                         # Pad the title with spaces so that the cloud looks
2247                         # less crammed.
2248                         my $title = $ctags_lc{$_}->{topname};
2249                         $title =~ s/ /&nbsp;/g;
2250                         $title =~ s/^/&nbsp;/g;
2251                         $title =~ s/$/&nbsp;/g;
2252                         $cloud->add($title, $home_link."?by_tag=".$_, $ctags_lc{$_}->{count});
2253                 }
2254         } else {
2255                 $cloud = \%ctags_lc;
2256         }
2257         $cloud;
2258 }
2259
2260 sub git_show_project_tagcloud {
2261         my ($cloud, $count) = @_;
2262         print STDERR ref($cloud)."..\n";
2263         if (ref $cloud eq 'HTML::TagCloud') {
2264                 return $cloud->html_and_css($count);
2265         } else {
2266                 my @tags = sort { $cloud->{$a}->{count} <=> $cloud->{$b}->{count} } keys %$cloud;
2267                 return '<p align="center">' . join (', ', map {
2268                         $cgi->a({-href=>"$home_link?by_tag=$_"}, $cloud->{$_}->{topname})
2269                 } splice(@tags, 0, $count)) . '</p>';
2270         }
2271 }
2272
2273 sub git_get_project_url_list {
2274         my $path = shift;
2275
2276         $git_dir = "$projectroot/$path";
2277         open my $fd, '<', "$git_dir/cloneurl"
2278                 or return wantarray ?
2279                 @{ config_to_multi(git_get_project_config('url')) } :
2280                    config_to_multi(git_get_project_config('url'));
2281         my @git_project_url_list = map { chomp; $_ } <$fd>;
2282         close $fd;
2283
2284         return wantarray ? @git_project_url_list : \@git_project_url_list;
2285 }
2286
2287 sub git_get_projects_list {
2288         my ($filter) = @_;
2289         my @list;
2290
2291         $filter ||= '';
2292         $filter =~ s/\.git$//;
2293
2294         my $check_forks = gitweb_check_feature('forks');
2295
2296         if (-d $projects_list) {
2297                 # search in directory
2298                 my $dir = $projects_list . ($filter ? "/$filter" : '');
2299                 # remove the trailing "/"
2300                 $dir =~ s!/+$!!;
2301                 my $pfxlen = length("$dir");
2302                 my $pfxdepth = ($dir =~ tr!/!!);
2303
2304                 File::Find::find({
2305                         follow_fast => 1, # follow symbolic links
2306                         follow_skip => 2, # ignore duplicates
2307                         dangling_symlinks => 0, # ignore dangling symlinks, silently
2308                         wanted => sub {
2309                                 # skip project-list toplevel, if we get it.
2310                                 return if (m!^[/.]$!);
2311                                 # only directories can be git repositories
2312                                 return unless (-d $_);
2313                                 # don't traverse too deep (Find is super slow on os x)
2314                                 if (($File::Find::name =~ tr!/!!) - $pfxdepth > $project_maxdepth) {
2315                                         $File::Find::prune = 1;
2316                                         return;
2317                                 }
2318
2319                                 my $subdir = substr($File::Find::name, $pfxlen + 1);
2320                                 # we check related file in $projectroot
2321                                 my $path = ($filter ? "$filter/" : '') . $subdir;
2322                                 if (check_export_ok("$projectroot/$path")) {
2323                                         push @list, { path => $path };
2324                                         $File::Find::prune = 1;
2325                                 }
2326                         },
2327                 }, "$dir");
2328
2329         } elsif (-f $projects_list) {
2330                 # read from file(url-encoded):
2331                 # 'git%2Fgit.git Linus+Torvalds'
2332                 # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2333                 # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2334                 my %paths;
2335                 open my $fd, '<', $projects_list or return;
2336         PROJECT:
2337                 while (my $line = <$fd>) {
2338                         chomp $line;
2339                         my ($path, $owner) = split ' ', $line;
2340                         $path = unescape($path);
2341                         $owner = unescape($owner);
2342                         if (!defined $path) {
2343                                 next;
2344                         }
2345                         if ($filter ne '') {
2346                                 # looking for forks;
2347                                 my $pfx = substr($path, 0, length($filter));
2348                                 if ($pfx ne $filter) {
2349                                         next PROJECT;
2350                                 }
2351                                 my $sfx = substr($path, length($filter));
2352                                 if ($sfx !~ /^\/.*\.git$/) {
2353                                         next PROJECT;
2354                                 }
2355                         } elsif ($check_forks) {
2356                         PATH:
2357                                 foreach my $filter (keys %paths) {
2358                                         # looking for forks;
2359                                         my $pfx = substr($path, 0, length($filter));
2360                                         if ($pfx ne $filter) {
2361                                                 next PATH;
2362                                         }
2363                                         my $sfx = substr($path, length($filter));
2364                                         if ($sfx !~ /^\/.*\.git$/) {
2365                                                 next PATH;
2366                                         }
2367                                         # is a fork, don't include it in
2368                                         # the list
2369                                         next PROJECT;
2370                                 }
2371                         }
2372                         if (check_export_ok("$projectroot/$path")) {
2373                                 my $pr = {
2374                                         path => $path,
2375                                         owner => to_utf8($owner),
2376                                 };
2377                                 push @list, $pr;
2378                                 (my $forks_path = $path) =~ s/\.git$//;
2379                                 $paths{$forks_path}++;
2380                         }
2381                 }
2382                 close $fd;
2383         }
2384         return @list;
2385 }
2386
2387 our $gitweb_project_owner = undef;
2388 sub git_get_project_list_from_file {
2389
2390         return if (defined $gitweb_project_owner);
2391
2392         $gitweb_project_owner = {};
2393         # read from file (url-encoded):
2394         # 'git%2Fgit.git Linus+Torvalds'
2395         # 'libs%2Fklibc%2Fklibc.git H.+Peter+Anvin'
2396         # 'linux%2Fhotplug%2Fudev.git Greg+Kroah-Hartman'
2397         if (-f $projects_list) {
2398                 open(my $fd, '<', $projects_list);
2399                 while (my $line = <$fd>) {
2400                         chomp $line;
2401                         my ($pr, $ow) = split ' ', $line;
2402                         $pr = unescape($pr);
2403                         $ow = unescape($ow);
2404                         $gitweb_project_owner->{$pr} = to_utf8($ow);
2405                 }
2406                 close $fd;
2407         }
2408 }
2409
2410 sub git_get_project_owner {
2411         my $project = shift;
2412         my $owner;
2413
2414         return undef unless $project;
2415         $git_dir = "$projectroot/$project";
2416
2417         if (!defined $gitweb_project_owner) {
2418                 git_get_project_list_from_file();
2419         }
2420
2421         if (exists $gitweb_project_owner->{$project}) {
2422                 $owner = $gitweb_project_owner->{$project};
2423         }
2424         if (!defined $owner){
2425                 $owner = git_get_project_config('owner');
2426         }
2427         if (!defined $owner) {
2428                 $owner = get_file_owner("$git_dir");
2429         }
2430
2431         return $owner;
2432 }
2433
2434 sub git_get_last_activity {
2435         my ($path) = @_;
2436         my $fd;
2437
2438         $git_dir = "$projectroot/$path";
2439         open($fd, "-|", git_cmd(), 'for-each-ref',
2440              '--format=%(committer)',
2441              '--sort=-committerdate',
2442              '--count=1',
2443              'refs/heads') or return;
2444         my $most_recent = <$fd>;
2445         close $fd or return;
2446         if (defined $most_recent &&
2447             $most_recent =~ / (\d+) [-+][01]\d\d\d$/) {
2448                 my $timestamp = $1;
2449                 my $age = time - $timestamp;
2450                 return ($age, age_string($age));
2451         }
2452         return (undef, undef);
2453 }
2454
2455 sub git_get_references {
2456         my $type = shift || "";
2457         my %refs;
2458         # 5dc01c595e6c6ec9ccda4f6f69c131c0dd945f8c refs/tags/v2.6.11
2459         # c39ae07f393806ccf406ef966e9a15afc43cc36a refs/tags/v2.6.11^{}
2460         open my $fd, "-|", git_cmd(), "show-ref", "--dereference",
2461                 ($type ? ("--", "refs/$type") : ()) # use -- <pattern> if $type
2462                 or return;
2463
2464         while (my $line = <$fd>) {
2465                 chomp $line;
2466                 if ($line =~ m!^([0-9a-fA-F]{40})\srefs/($type.*)$!) {
2467                         if (defined $refs{$1}) {
2468                                 push @{$refs{$1}}, $2;
2469                         } else {
2470                                 $refs{$1} = [ $2 ];
2471                         }
2472                 }
2473         }
2474         close $fd or return;
2475         return \%refs;
2476 }
2477
2478 sub git_get_rev_name_tags {
2479         my $hash = shift || return undef;
2480
2481         open my $fd, "-|", git_cmd(), "name-rev", "--tags", $hash
2482                 or return;
2483         my $name_rev = <$fd>;
2484         close $fd;
2485
2486         if ($name_rev =~ m|^$hash tags/(.*)$|) {
2487                 return $1;
2488         } else {
2489                 # catches also '$hash undefined' output
2490                 return undef;
2491         }
2492 }
2493
2494 ## ----------------------------------------------------------------------
2495 ## parse to hash functions
2496
2497 sub parse_date {
2498         my $epoch = shift;
2499         my $tz = shift || "-0000";
2500
2501         my %date;
2502         my @months = ("Jan", "Feb", "Mar", "Apr", "May", "Jun", "Jul", "Aug", "Sep", "Oct", "Nov", "Dec");
2503         my @days = ("Sun", "Mon", "Tue", "Wed", "Thu", "Fri", "Sat");
2504         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($epoch);
2505         $date{'hour'} = $hour;
2506         $date{'minute'} = $min;
2507         $date{'mday'} = $mday;
2508         $date{'day'} = $days[$wday];
2509         $date{'month'} = $months[$mon];
2510         $date{'rfc2822'}   = sprintf "%s, %d %s %4d %02d:%02d:%02d +0000",
2511                              $days[$wday], $mday, $months[$mon], 1900+$year, $hour ,$min, $sec;
2512         $date{'mday-time'} = sprintf "%d %s %02d:%02d",
2513                              $mday, $months[$mon], $hour ,$min;
2514         $date{'iso-8601'}  = sprintf "%04d-%02d-%02dT%02d:%02d:%02dZ",
2515                              1900+$year, 1+$mon, $mday, $hour ,$min, $sec;
2516
2517         $tz =~ m/^([+\-][0-9][0-9])([0-9][0-9])$/;
2518         my $local = $epoch + ((int $1 + ($2/60)) * 3600);
2519         ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($local);
2520         $date{'hour_local'} = $hour;
2521         $date{'minute_local'} = $min;
2522         $date{'tz_local'} = $tz;
2523         $date{'iso-tz'} = sprintf("%04d-%02d-%02d %02d:%02d:%02d %s",
2524                                   1900+$year, $mon+1, $mday,
2525                                   $hour, $min, $sec, $tz);
2526         return %date;
2527 }
2528
2529 sub parse_tag {
2530         my $tag_id = shift;
2531         my %tag;
2532         my @comment;
2533
2534         open my $fd, "-|", git_cmd(), "cat-file", "tag", $tag_id or return;
2535         $tag{'id'} = $tag_id;
2536         while (my $line = <$fd>) {
2537                 chomp $line;
2538                 if ($line =~ m/^object ([0-9a-fA-F]{40})$/) {
2539                         $tag{'object'} = $1;
2540                 } elsif ($line =~ m/^type (.+)$/) {
2541                         $tag{'type'} = $1;
2542                 } elsif ($line =~ m/^tag (.+)$/) {
2543                         $tag{'name'} = $1;
2544                 } elsif ($line =~ m/^tagger (.*) ([0-9]+) (.*)$/) {
2545                         $tag{'author'} = $1;
2546                         $tag{'author_epoch'} = $2;
2547                         $tag{'author_tz'} = $3;
2548                         if ($tag{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2549                                 $tag{'author_name'}  = $1;
2550                                 $tag{'author_email'} = $2;
2551                         } else {
2552                                 $tag{'author_name'} = $tag{'author'};
2553                         }
2554                 } elsif ($line =~ m/--BEGIN/) {
2555                         push @comment, $line;
2556                         last;
2557                 } elsif ($line eq "") {
2558                         last;
2559                 }
2560         }
2561         push @comment, <$fd>;
2562         $tag{'comment'} = \@comment;
2563         close $fd or return;
2564         if (!defined $tag{'name'}) {
2565                 return
2566         };
2567         return %tag
2568 }
2569
2570 sub parse_commit_text {
2571         my ($commit_text, $withparents) = @_;
2572         my @commit_lines = split '\n', $commit_text;
2573         my %co;
2574
2575         pop @commit_lines; # Remove '\0'
2576
2577         if (! @commit_lines) {
2578                 return;
2579         }
2580
2581         my $header = shift @commit_lines;
2582         if ($header !~ m/^[0-9a-fA-F]{40}/) {
2583                 return;
2584         }
2585         ($co{'id'}, my @parents) = split ' ', $header;
2586         while (my $line = shift @commit_lines) {
2587                 last if $line eq "\n";
2588                 if ($line =~ m/^tree ([0-9a-fA-F]{40})$/) {
2589                         $co{'tree'} = $1;
2590                 } elsif ((!defined $withparents) && ($line =~ m/^parent ([0-9a-fA-F]{40})$/)) {
2591                         push @parents, $1;
2592                 } elsif ($line =~ m/^author (.*) ([0-9]+) (.*)$/) {
2593                         $co{'author'} = to_utf8($1);
2594                         $co{'author_epoch'} = $2;
2595                         $co{'author_tz'} = $3;
2596                         if ($co{'author'} =~ m/^([^<]+) <([^>]*)>/) {
2597                                 $co{'author_name'}  = $1;
2598                                 $co{'author_email'} = $2;
2599                         } else {
2600                                 $co{'author_name'} = $co{'author'};
2601                         }
2602                 } elsif ($line =~ m/^committer (.*) ([0-9]+) (.*)$/) {
2603                         $co{'committer'} = to_utf8($1);
2604                         $co{'committer_epoch'} = $2;
2605                         $co{'committer_tz'} = $3;
2606                         if ($co{'committer'} =~ m/^([^<]+) <([^>]*)>/) {
2607                                 $co{'committer_name'}  = $1;
2608                                 $co{'committer_email'} = $2;
2609                         } else {
2610                                 $co{'committer_name'} = $co{'committer'};
2611                         }
2612                 }
2613         }
2614         if (!defined $co{'tree'}) {
2615                 return;
2616         };
2617         $co{'parents'} = \@parents;
2618         $co{'parent'} = $parents[0];
2619
2620         foreach my $title (@commit_lines) {
2621                 $title =~ s/^    //;
2622                 if ($title ne "") {
2623                         $co{'title'} = chop_str($title, 80, 5);
2624                         # remove leading stuff of merges to make the interesting part visible
2625                         if (length($title) > 50) {
2626                                 $title =~ s/^Automatic //;
2627                                 $title =~ s/^merge (of|with) /Merge ... /i;
2628                                 if (length($title) > 50) {
2629                                         $title =~ s/(http|rsync):\/\///;
2630                                 }
2631                                 if (length($title) > 50) {
2632                                         $title =~ s/(master|www|rsync)\.//;
2633                                 }
2634                                 if (length($title) > 50) {
2635                                         $title =~ s/kernel.org:?//;
2636                                 }
2637                                 if (length($title) > 50) {
2638                                         $title =~ s/\/pub\/scm//;
2639                                 }
2640                         }
2641                         $co{'title_short'} = chop_str($title, 50, 5);
2642                         last;
2643                 }
2644         }
2645         if (! defined $co{'title'} || $co{'title'} eq "") {
2646                 $co{'title'} = $co{'title_short'} = '(no commit message)';
2647         }
2648         # remove added spaces
2649         foreach my $line (@commit_lines) {
2650                 $line =~ s/^    //;
2651         }
2652         $co{'comment'} = \@commit_lines;
2653
2654         my $age = time - $co{'committer_epoch'};
2655         $co{'age'} = $age;
2656         $co{'age_string'} = age_string($age);
2657         my ($sec, $min, $hour, $mday, $mon, $year, $wday, $yday) = gmtime($co{'committer_epoch'});
2658         if ($age > 60*60*24*7*2) {
2659                 $co{'age_string_date'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2660                 $co{'age_string_age'} = $co{'age_string'};
2661         } else {
2662                 $co{'age_string_date'} = $co{'age_string'};
2663                 $co{'age_string_age'} = sprintf "%4i-%02u-%02i", 1900 + $year, $mon+1, $mday;
2664         }
2665         return %co;
2666 }
2667
2668 sub parse_commit {
2669         my ($commit_id) = @_;
2670         my %co;
2671
2672         local $/ = "\0";
2673
2674         open my $fd, "-|", git_cmd(), "rev-list",
2675                 "--parents",
2676                 "--header",
2677                 "--max-count=1",
2678                 $commit_id,
2679                 "--",
2680                 or die_error(500, "Open git-rev-list failed");
2681         %co = parse_commit_text(<$fd>, 1);
2682         close $fd;
2683
2684         return %co;
2685 }
2686
2687 sub parse_commits {
2688         my ($commit_id, $maxcount, $skip, $filename, @args) = @_;
2689         my @cos;
2690
2691         $maxcount ||= 1;
2692         $skip ||= 0;
2693
2694         local $/ = "\0";
2695
2696         open my $fd, "-|", git_cmd(), "rev-list",
2697                 "--header",
2698                 @args,
2699                 ("--max-count=" . $maxcount),
2700                 ("--skip=" . $skip),
2701                 @extra_options,
2702                 $commit_id,
2703                 "--",
2704                 ($filename ? ($filename) : ())
2705                 or die_error(500, "Open git-rev-list failed");
2706         while (my $line = <$fd>) {
2707                 my %co = parse_commit_text($line);
2708                 push @cos, \%co;
2709         }
2710         close $fd;
2711
2712         return wantarray ? @cos : \@cos;
2713 }
2714
2715 # parse line of git-diff-tree "raw" output
2716 sub parse_difftree_raw_line {
2717         my $line = shift;
2718         my %res;
2719
2720         # ':100644 100644 03b218260e99b78c6df0ed378e59ed9205ccc96d 3b93d5e7cc7f7dd4ebed13a5cc1a4ad976fc94d8 M   ls-files.c'
2721         # ':100644 100644 7f9281985086971d3877aca27704f2aaf9c448ce bc190ebc71bbd923f2b728e505408f5e54bd073a M   rev-tree.c'
2722         if ($line =~ m/^:([0-7]{6}) ([0-7]{6}) ([0-9a-fA-F]{40}) ([0-9a-fA-F]{40}) (.)([0-9]{0,3})\t(.*)$/) {
2723                 $res{'from_mode'} = $1;
2724                 $res{'to_mode'} = $2;
2725                 $res{'from_id'} = $3;
2726                 $res{'to_id'} = $4;
2727                 $res{'status'} = $5;
2728                 $res{'similarity'} = $6;
2729                 if ($res{'status'} eq 'R' || $res{'status'} eq 'C') { # renamed or copied
2730                         ($res{'from_file'}, $res{'to_file'}) = map { unquote($_) } split("\t", $7);
2731                 } else {
2732                         $res{'from_file'} = $res{'to_file'} = $res{'file'} = unquote($7);
2733                 }
2734         }
2735         # '::100755 100755 100755 60e79ca1b01bc8b057abe17ddab484699a7f5fdb 94067cc5f73388f33722d52ae02f44692bc07490 94067cc5f73388f33722d52ae02f44692bc07490 MR git-gui/git-gui.sh'
2736         # combined diff (for merge commit)
2737         elsif ($line =~ s/^(::+)((?:[0-7]{6} )+)((?:[0-9a-fA-F]{40} )+)([a-zA-Z]+)\t(.*)$//) {
2738                 $res{'nparents'}  = length($1);
2739                 $res{'from_mode'} = [ split(' ', $2) ];
2740                 $res{'to_mode'} = pop @{$res{'from_mode'}};
2741                 $res{'from_id'} = [ split(' ', $3) ];
2742                 $res{'to_id'} = pop @{$res{'from_id'}};
2743                 $res{'status'} = [ split('', $4) ];
2744                 $res{'to_file'} = unquote($5);
2745         }
2746         # 'c512b523472485aef4fff9e57b229d9d243c967f'
2747         elsif ($line =~ m/^([0-9a-fA-F]{40})$/) {
2748                 $res{'commit'} = $1;
2749         }
2750
2751         return wantarray ? %res : \%res;
2752 }
2753
2754 # wrapper: return parsed line of git-diff-tree "raw" output
2755 # (the argument might be raw line, or parsed info)
2756 sub parsed_difftree_line {
2757         my $line_or_ref = shift;
2758
2759         if (ref($line_or_ref) eq "HASH") {
2760                 # pre-parsed (or generated by hand)
2761                 return $line_or_ref;
2762         } else {
2763                 return parse_difftree_raw_line($line_or_ref);
2764         }
2765 }
2766
2767 # parse line of git-ls-tree output
2768 sub parse_ls_tree_line {
2769         my $line = shift;
2770         my %opts = @_;
2771         my %res;
2772
2773         #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
2774         $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t(.+)$/s;
2775
2776         $res{'mode'} = $1;
2777         $res{'type'} = $2;
2778         $res{'hash'} = $3;
2779         if ($opts{'-z'}) {
2780                 $res{'name'} = $4;
2781         } else {
2782                 $res{'name'} = unquote($4);
2783         }
2784
2785         return wantarray ? %res : \%res;
2786 }
2787
2788 # generates _two_ hashes, references to which are passed as 2 and 3 argument
2789 sub parse_from_to_diffinfo {
2790         my ($diffinfo, $from, $to, @parents) = @_;
2791
2792         if ($diffinfo->{'nparents'}) {
2793                 # combined diff
2794                 $from->{'file'} = [];
2795                 $from->{'href'} = [];
2796                 fill_from_file_info($diffinfo, @parents)
2797                         unless exists $diffinfo->{'from_file'};
2798                 for (my $i = 0; $i < $diffinfo->{'nparents'}; $i++) {
2799                         $from->{'file'}[$i] =
2800                                 defined $diffinfo->{'from_file'}[$i] ?
2801                                         $diffinfo->{'from_file'}[$i] :
2802                                         $diffinfo->{'to_file'};
2803                         if ($diffinfo->{'status'}[$i] ne "A") { # not new (added) file
2804                                 $from->{'href'}[$i] = href(action=>"blob",
2805                                                            hash_base=>$parents[$i],
2806                                                            hash=>$diffinfo->{'from_id'}[$i],
2807                                                            file_name=>$from->{'file'}[$i]);
2808                         } else {
2809                                 $from->{'href'}[$i] = undef;
2810                         }
2811                 }
2812         } else {
2813                 # ordinary (not combined) diff
2814                 $from->{'file'} = $diffinfo->{'from_file'};
2815                 if ($diffinfo->{'status'} ne "A") { # not new (added) file
2816                         $from->{'href'} = href(action=>"blob", hash_base=>$hash_parent,
2817                                                hash=>$diffinfo->{'from_id'},
2818                                                file_name=>$from->{'file'});
2819                 } else {
2820                         delete $from->{'href'};
2821                 }
2822         }
2823
2824         $to->{'file'} = $diffinfo->{'to_file'};
2825         if (!is_deleted($diffinfo)) { # file exists in result
2826                 $to->{'href'} = href(action=>"blob", hash_base=>$hash,
2827                                      hash=>$diffinfo->{'to_id'},
2828                                      file_name=>$to->{'file'});
2829         } else {
2830                 delete $to->{'href'};
2831         }
2832 }
2833
2834 ## ......................................................................
2835 ## parse to array of hashes functions
2836
2837 sub git_get_heads_list {
2838         my $limit = shift;
2839         my @headslist;
2840
2841         open my $fd, '-|', git_cmd(), 'for-each-ref',
2842                 ($limit ? '--count='.($limit+1) : ()), '--sort=-committerdate',
2843                 '--format=%(objectname) %(refname) %(subject)%00%(committer)',
2844                 'refs/heads'
2845                 or return;
2846         while (my $line = <$fd>) {
2847                 my %ref_item;
2848
2849                 chomp $line;
2850                 my ($refinfo, $committerinfo) = split(/\0/, $line);
2851                 my ($hash, $name, $title) = split(' ', $refinfo, 3);
2852                 my ($committer, $epoch, $tz) =
2853                         ($committerinfo =~ /^(.*) ([0-9]+) (.*)$/);
2854                 $ref_item{'fullname'}  = $name;
2855                 $name =~ s!^refs/heads/!!;
2856
2857                 $ref_item{'name'}  = $name;
2858                 $ref_item{'id'}    = $hash;
2859                 $ref_item{'title'} = $title || '(no commit message)';
2860                 $ref_item{'epoch'} = $epoch;
2861                 if ($epoch) {
2862                         $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2863                 } else {
2864                         $ref_item{'age'} = "unknown";
2865                 }
2866
2867                 push @headslist, \%ref_item;
2868         }
2869         close $fd;
2870
2871         return wantarray ? @headslist : \@headslist;
2872 }
2873
2874 sub git_get_tags_list {
2875         my $limit = shift;
2876         my @tagslist;
2877
2878         open my $fd, '-|', git_cmd(), 'for-each-ref',
2879                 ($limit ? '--count='.($limit+1) : ()), '--sort=-creatordate',
2880                 '--format=%(objectname) %(objecttype) %(refname) '.
2881                 '%(*objectname) %(*objecttype) %(subject)%00%(creator)',
2882                 'refs/tags'
2883                 or return;
2884         while (my $line = <$fd>) {
2885                 my %ref_item;
2886
2887                 chomp $line;
2888                 my ($refinfo, $creatorinfo) = split(/\0/, $line);
2889                 my ($id, $type, $name, $refid, $reftype, $title) = split(' ', $refinfo, 6);
2890                 my ($creator, $epoch, $tz) =
2891                         ($creatorinfo =~ /^(.*) ([0-9]+) (.*)$/);
2892                 $ref_item{'fullname'} = $name;
2893                 $name =~ s!^refs/tags/!!;
2894
2895                 $ref_item{'type'} = $type;
2896                 $ref_item{'id'} = $id;
2897                 $ref_item{'name'} = $name;
2898                 if ($type eq "tag") {
2899                         $ref_item{'subject'} = $title;
2900                         $ref_item{'reftype'} = $reftype;
2901                         $ref_item{'refid'}   = $refid;
2902                 } else {
2903                         $ref_item{'reftype'} = $type;
2904                         $ref_item{'refid'}   = $id;
2905                 }
2906
2907                 if ($type eq "tag" || $type eq "commit") {
2908                         $ref_item{'epoch'} = $epoch;
2909                         if ($epoch) {
2910                                 $ref_item{'age'} = age_string(time - $ref_item{'epoch'});
2911                         } else {
2912                                 $ref_item{'age'} = "unknown";
2913                         }
2914                 }
2915
2916                 push @tagslist, \%ref_item;
2917         }
2918         close $fd;
2919
2920         return wantarray ? @tagslist : \@tagslist;
2921 }
2922
2923 ## ----------------------------------------------------------------------
2924 ## filesystem-related functions
2925
2926 sub get_file_owner {
2927         my $path = shift;
2928
2929         my ($dev, $ino, $mode, $nlink, $st_uid, $st_gid, $rdev, $size) = stat($path);
2930         my ($name, $passwd, $uid, $gid, $quota, $comment, $gcos, $dir, $shell) = getpwuid($st_uid);
2931         if (!defined $gcos) {
2932                 return undef;
2933         }
2934         my $owner = $gcos;
2935         $owner =~ s/[,;].*$//;
2936         return to_utf8($owner);
2937 }
2938
2939 # assume that file exists
2940 sub insert_file {
2941         my $filename = shift;
2942
2943         open my $fd, '<', $filename;
2944         print map { to_utf8($_) } <$fd>;
2945         close $fd;
2946 }
2947
2948 ## ......................................................................
2949 ## mimetype related functions
2950
2951 sub mimetype_guess_file {
2952         my $filename = shift;
2953         my $mimemap = shift;
2954         -r $mimemap or return undef;
2955
2956         my %mimemap;
2957         open(my $mh, '<', $mimemap) or return undef;
2958         while (<$mh>) {
2959                 next if m/^#/; # skip comments
2960                 my ($mimetype, $exts) = split(/\t+/);
2961                 if (defined $exts) {
2962                         my @exts = split(/\s+/, $exts);
2963                         foreach my $ext (@exts) {
2964                                 $mimemap{$ext} = $mimetype;
2965                         }
2966                 }
2967         }
2968         close($mh);
2969
2970         $filename =~ /\.([^.]*)$/;
2971         return $mimemap{$1};
2972 }
2973
2974 sub mimetype_guess {
2975         my $filename = shift;
2976         my $mime;
2977         $filename =~ /\./ or return undef;
2978
2979         if ($mimetypes_file) {
2980                 my $file = $mimetypes_file;
2981                 if ($file !~ m!^/!) { # if it is relative path
2982                         # it is relative to project
2983                         $file = "$projectroot/$project/$file";
2984                 }
2985                 $mime = mimetype_guess_file($filename, $file);
2986         }
2987         $mime ||= mimetype_guess_file($filename, '/etc/mime.types');
2988         return $mime;
2989 }
2990
2991 sub blob_mimetype {
2992         my $fd = shift;
2993         my $filename = shift;
2994
2995         if ($filename) {
2996                 my $mime = mimetype_guess($filename);
2997                 $mime and return $mime;
2998         }
2999
3000         # just in case
3001         return $default_blob_plain_mimetype unless $fd;
3002
3003         if (-T $fd) {
3004                 return 'text/plain';
3005         } elsif (! $filename) {
3006                 return 'application/octet-stream';
3007         } elsif ($filename =~ m/\.png$/i) {
3008                 return 'image/png';
3009         } elsif ($filename =~ m/\.gif$/i) {
3010                 return 'image/gif';
3011         } elsif ($filename =~ m/\.jpe?g$/i) {
3012                 return 'image/jpeg';
3013         } else {
3014                 return 'application/octet-stream';
3015         }
3016 }
3017
3018 sub blob_contenttype {
3019         my ($fd, $file_name, $type) = @_;
3020
3021         $type ||= blob_mimetype($fd, $file_name);
3022         if ($type eq 'text/plain' && defined $default_text_plain_charset) {
3023                 $type .= "; charset=$default_text_plain_charset";
3024         }
3025
3026         return $type;
3027 }
3028
3029 ## ======================================================================
3030 ## functions printing HTML: header, footer, error page
3031
3032 sub git_header_html {
3033         my $status = shift || "200 OK";
3034         my $expires = shift;
3035
3036         my $title = "$site_name";
3037         if (defined $project) {
3038                 $title .= " - " . to_utf8($project);
3039                 if (defined $action) {
3040                         $title .= "/$action";
3041                         if (defined $file_name) {
3042                                 $title .= " - " . esc_path($file_name);
3043                                 if ($action eq "tree" && $file_name !~ m|/$|) {
3044                                         $title .= "/";
3045                                 }
3046                         }
3047                 }
3048         }
3049         my $content_type;
3050         # require explicit support from the UA if we are to send the page as
3051         # 'application/xhtml+xml', otherwise send it as plain old 'text/html'.
3052         # we have to do this because MSIE sometimes globs '*/*', pretending to
3053         # support xhtml+xml but choking when it gets what it asked for.
3054         if (defined $cgi->http('HTTP_ACCEPT') &&
3055             $cgi->http('HTTP_ACCEPT') =~ m/(,|;|\s|^)application\/xhtml\+xml(,|;|\s|$)/ &&
3056             $cgi->Accept('application/xhtml+xml') != 0) {
3057                 $content_type = 'application/xhtml+xml';
3058         } else {
3059                 $content_type = 'text/html';
3060         }
3061         print $cgi->header(-type=>$content_type, -charset => 'utf-8',
3062                            -status=> $status, -expires => $expires);
3063         my $mod_perl_version = $ENV{'MOD_PERL'} ? " $ENV{'MOD_PERL'}" : '';
3064         print <<EOF;
3065 <?xml version="1.0" encoding="utf-8"?>
3066 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
3067 <html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en-US" lang="en-US">
3068 <!-- git web interface version $version, (C) 2005-2006, Kay Sievers <kay.sievers\@vrfy.org>, Christian Gierke -->
3069 <!-- git core binaries version $git_version -->
3070 <head>
3071 <meta http-equiv="content-type" content="$content_type; charset=utf-8"/>
3072 <meta name="generator" content="gitweb/$version git/$git_version$mod_perl_version"/>
3073 <meta name="robots" content="index, nofollow"/>
3074 <title>$title</title>
3075 EOF
3076         # the stylesheet, favicon etc urls won't work correctly with path_info
3077         # unless we set the appropriate base URL
3078         if ($ENV{'PATH_INFO'}) {
3079                 print "<base href=\"".esc_url($base_url)."\" />\n";
3080         }
3081         # print out each stylesheet that exist, providing backwards capability
3082         # for those people who defined $stylesheet in a config file
3083         if (defined $stylesheet) {
3084                 print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3085         } else {
3086                 foreach my $stylesheet (@stylesheets) {
3087                         next unless $stylesheet;
3088                         print '<link rel="stylesheet" type="text/css" href="'.esc_url($stylesheet).'"/>'."\n";
3089                 }
3090         }
3091         if (defined $project) {
3092                 my %href_params = get_feed_info();
3093                 if (!exists $href_params{'-title'}) {
3094                         $href_params{'-title'} = 'log';
3095                 }
3096
3097                 foreach my $format qw(RSS Atom) {
3098                         my $type = lc($format);
3099                         my %link_attr = (
3100                                 '-rel' => 'alternate',
3101                                 '-title' => esc_attr("$project - $href_params{'-title'} - $format feed"),
3102                                 '-type' => "application/$type+xml"
3103                         );
3104
3105                         $href_params{'action'} = $type;
3106                         $link_attr{'-href'} = href(%href_params);
3107                         print "<link ".
3108                               "rel=\"$link_attr{'-rel'}\" ".
3109                               "title=\"$link_attr{'-title'}\" ".
3110                               "href=\"$link_attr{'-href'}\" ".
3111                               "type=\"$link_attr{'-type'}\" ".
3112                               "/>\n";
3113
3114                         $href_params{'extra_options'} = '--no-merges';
3115                         $link_attr{'-href'} = href(%href_params);
3116                         $link_attr{'-title'} .= ' (no merges)';
3117                         print "<link ".
3118                               "rel=\"$link_attr{'-rel'}\" ".
3119                               "title=\"$link_attr{'-title'}\" ".
3120                               "href=\"$link_attr{'-href'}\" ".
3121                               "type=\"$link_attr{'-type'}\" ".
3122                               "/>\n";
3123                 }
3124
3125         } else {
3126                 printf('<link rel="alternate" title="%s projects list" '.
3127                        'href="%s" type="text/plain; charset=utf-8" />'."\n",
3128                        esc_attr($site_name), href(project=>undef, action=>"project_index"));
3129                 printf('<link rel="alternate" title="%s projects feeds" '.
3130                        'href="%s" type="text/x-opml" />'."\n",
3131                        esc_attr($site_name), href(project=>undef, action=>"opml"));
3132         }
3133         if (defined $favicon) {
3134                 print qq(<link rel="shortcut icon" href=").esc_url($favicon).qq(" type="image/png" />\n);
3135         }
3136
3137         print "</head>\n" .
3138               "<body>\n";
3139
3140         if (-f $site_header) {
3141                 insert_file($site_header);
3142         }
3143
3144         print "<div class=\"page_header\">\n" .
3145               $cgi->a({-href => esc_url($logo_url),
3146                        -title => $logo_label},
3147                       qq(<img src=").esc_url($logo).qq(" width="72" height="27" alt="git" class="logo"/>));
3148         print $cgi->a({-href => esc_url($home_link)}, $home_link_str) . " / ";
3149         if (defined $project) {
3150                 print $cgi->a({-href => href(action=>"summary")}, esc_html($project));
3151                 if (defined $action) {
3152                         print " / $action";
3153                 }
3154                 print "\n";
3155         }
3156         print "</div>\n";
3157
3158         my $have_search = gitweb_check_feature('search');
3159         if (defined $project && $have_search) {
3160                 if (!defined $searchtext) {
3161                         $searchtext = "";
3162                 }
3163                 my $search_hash;
3164                 if (defined $hash_base) {
3165                         $search_hash = $hash_base;
3166                 } elsif (defined $hash) {
3167                         $search_hash = $hash;
3168                 } else {
3169                         $search_hash = "HEAD";
3170                 }
3171                 my $action = $my_uri;
3172                 my $use_pathinfo = gitweb_check_feature('pathinfo');
3173                 if ($use_pathinfo) {
3174                         $action .= "/".esc_url($project);
3175                 }
3176                 print $cgi->startform(-method => "get", -action => $action) .
3177                       "<div class=\"search\">\n" .
3178                       (!$use_pathinfo &&
3179                       $cgi->input({-name=>"p", -value=>$project, -type=>"hidden"}) . "\n") .
3180                       $cgi->input({-name=>"a", -value=>"search", -type=>"hidden"}) . "\n" .
3181                       $cgi->input({-name=>"h", -value=>$search_hash, -type=>"hidden"}) . "\n" .
3182                       $cgi->popup_menu(-name => 'st', -default => 'commit',
3183                                        -values => ['commit', 'grep', 'author', 'committer', 'pickaxe']) .
3184                       $cgi->sup($cgi->a({-href => href(action=>"search_help")}, "?")) .
3185                       " search:\n",
3186                       $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
3187                       "<span title=\"Extended regular expression\">" .
3188                       $cgi->checkbox(-name => 'sr', -value => 1, -label => 're',
3189                                      -checked => $search_use_regexp) .
3190                       "</span>" .
3191                       "</div>" .
3192                       $cgi->end_form() . "\n";
3193         }
3194 }
3195
3196 sub git_footer_html {
3197         my $feed_class = 'rss_logo';
3198
3199         print "<div class=\"page_footer\">\n";
3200         if (defined $project) {
3201                 my $descr = git_get_project_description($project);
3202                 if (defined $descr) {
3203                         print "<div class=\"page_footer_text\">" . esc_html($descr) . "</div>\n";
3204                 }
3205
3206                 my %href_params = get_feed_info();
3207                 if (!%href_params) {
3208                         $feed_class .= ' generic';
3209                 }
3210                 $href_params{'-title'} ||= 'log';
3211
3212                 foreach my $format qw(RSS Atom) {
3213                         $href_params{'action'} = lc($format);
3214                         print $cgi->a({-href => href(%href_params),
3215                                       -title => "$href_params{'-title'} $format feed",
3216                                       -class => $feed_class}, $format)."\n";
3217                 }
3218
3219         } else {
3220                 print $cgi->a({-href => href(project=>undef, action=>"opml"),
3221                               -class => $feed_class}, "OPML") . " ";
3222                 print $cgi->a({-href => href(project=>undef, action=>"project_index"),
3223                               -class => $feed_class}, "TXT") . "\n";
3224         }
3225         print "</div>\n"; # class="page_footer"
3226
3227         if (-f $site_footer) {
3228                 insert_file($site_footer);
3229         }
3230
3231         print "</body>\n" .
3232               "</html>";
3233 }
3234
3235 # die_error(<http_status_code>, <error_message>)
3236 # Example: die_error(404, 'Hash not found')
3237 # By convention, use the following status codes (as defined in RFC 2616):
3238 # 400: Invalid or missing CGI parameters, or
3239 #      requested object exists but has wrong type.
3240 # 403: Requested feature (like "pickaxe" or "snapshot") not enabled on
3241 #      this server or project.
3242 # 404: Requested object/revision/project doesn't exist.
3243 # 500: The server isn't configured properly, or
3244 #      an internal error occurred (e.g. failed assertions caused by bugs), or
3245 #      an unknown error occurred (e.g. the git binary died unexpectedly).
3246 sub die_error {
3247         my $status = shift || 500;
3248         my $error = shift || "Internal server error";
3249
3250         my %http_responses = (400 => '400 Bad Request',
3251                               403 => '403 Forbidden',
3252                               404 => '404 Not Found',
3253                               500 => '500 Internal Server Error');
3254         git_header_html($http_responses{$status});
3255         print <<EOF;
3256 <div class="page_body">
3257 <br /><br />
3258 $status - $error
3259 <br />
3260 </div>
3261 EOF
3262         git_footer_html();
3263         exit;
3264 }
3265
3266 ## ----------------------------------------------------------------------
3267 ## functions printing or outputting HTML: navigation
3268
3269 sub git_print_page_nav {
3270         my ($current, $suppress, $head, $treehead, $treebase, $extra) = @_;
3271         $extra = '' if !defined $extra; # pager or formats
3272
3273         my @navs = qw(summary shortlog log commit commitdiff tree);
3274         if ($suppress) {
3275                 @navs = grep { $_ ne $suppress } @navs;
3276         }
3277
3278         my %arg = map { $_ => {action=>$_} } @navs;
3279         if (defined $head) {
3280                 for (qw(commit commitdiff)) {
3281                         $arg{$_}{'hash'} = $head;
3282                 }
3283                 if ($current =~ m/^(tree | log | shortlog | commit | commitdiff | search)$/x) {
3284                         for (qw(shortlog log)) {
3285                                 $arg{$_}{'hash'} = $head;
3286                         }
3287                 }
3288         }
3289
3290         $arg{'tree'}{'hash'} = $treehead if defined $treehead;
3291         $arg{'tree'}{'hash_base'} = $treebase if defined $treebase;
3292
3293         my @actions = gitweb_get_feature('actions');
3294         my %repl = (
3295                 '%' => '%',
3296                 'n' => $project,         # project name
3297                 'f' => $git_dir,         # project path within filesystem
3298                 'h' => $treehead || '',  # current hash ('h' parameter)
3299                 'b' => $treebase || '',  # hash base ('hb' parameter)
3300         );
3301         while (@actions) {
3302                 my ($label, $link, $pos) = splice(@actions,0,3);
3303                 # insert
3304                 @navs = map { $_ eq $pos ? ($_, $label) : $_ } @navs;
3305                 # munch munch
3306                 $link =~ s/%([%nfhb])/$repl{$1}/g;
3307                 $arg{$label}{'_href'} = $link;
3308         }
3309
3310         print "<div class=\"page_nav\">\n" .
3311                 (join " | ",
3312                  map { $_ eq $current ?
3313                        $_ : $cgi->a({-href => ($arg{$_}{_href} ? $arg{$_}{_href} : href(%{$arg{$_}}))}, "$_")
3314                  } @navs);
3315         print "<br/>\n$extra<br/>\n" .
3316               "</div>\n";
3317 }
3318
3319 sub format_paging_nav {
3320         my ($action, $hash, $head, $page, $has_next_link) = @_;
3321         my $paging_nav;
3322
3323
3324         if ($hash ne $head || $page) {
3325                 $paging_nav .= $cgi->a({-href => href(action=>$action)}, "HEAD");
3326         } else {
3327                 $paging_nav .= "HEAD";
3328         }
3329
3330         if ($page > 0) {
3331                 $paging_nav .= " &sdot; " .
3332                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
3333                                  -accesskey => "p", -title => "Alt-p"}, "prev");
3334         } else {
3335                 $paging_nav .= " &sdot; prev";
3336         }
3337
3338         if ($has_next_link) {
3339                 $paging_nav .= " &sdot; " .
3340                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
3341                                  -accesskey => "n", -title => "Alt-n"}, "next");
3342         } else {
3343                 $paging_nav .= " &sdot; next";
3344         }
3345
3346         return $paging_nav;
3347 }
3348
3349 ## ......................................................................
3350 ## functions printing or outputting HTML: div
3351
3352 sub git_print_header_div {
3353         my ($action, $title, $hash, $hash_base) = @_;
3354         my %args = ();
3355
3356         $args{'action'} = $action;
3357         $args{'hash'} = $hash if $hash;
3358         $args{'hash_base'} = $hash_base if $hash_base;
3359
3360         print "<div class=\"header\">\n" .
3361               $cgi->a({-href => href(%args), -class => "title"},
3362               $title ? $title : $action) .
3363               "\n</div>\n";
3364 }
3365
3366 sub print_local_time {
3367         my %date = @_;
3368         if ($date{'hour_local'} < 6) {
3369                 printf(" (<span class=\"atnight\">%02d:%02d</span> %s)",
3370                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3371         } else {
3372                 printf(" (%02d:%02d %s)",
3373                         $date{'hour_local'}, $date{'minute_local'}, $date{'tz_local'});
3374         }
3375 }
3376
3377 # Outputs the author name and date in long form
3378 sub git_print_authorship {
3379         my $co = shift;
3380         my %opts = @_;
3381         my $tag = $opts{-tag} || 'div';
3382
3383         my %ad = parse_date($co->{'author_epoch'}, $co->{'author_tz'});
3384         print "<$tag class=\"author_date\">" .
3385               esc_html($co->{'author_name'}) .
3386               " [$ad{'rfc2822'}";
3387         print_local_time(%ad) if ($opts{-localtime});
3388         print "]" . git_get_avatar($co->{'author_email'}, -pad_before => 1)
3389                   . "</$tag>\n";
3390 }
3391
3392 # Outputs table rows containing the full author or committer information,
3393 # in the format expected for 'commit' view (& similia).
3394 # Parameters are a commit hash reference, followed by the list of people
3395 # to output information for. If the list is empty it defalts to both
3396 # author and committer.
3397 sub git_print_authorship_rows {
3398         my $co = shift;
3399         # too bad we can't use @people = @_ || ('author', 'committer')
3400         my @people = @_;
3401         @people = ('author', 'committer') unless @people;
3402         foreach my $who (@people) {
3403                 my %wd = parse_date($co->{"${who}_epoch"}, $co->{"${who}_tz"});
3404                 print "<tr><td>$who</td><td>" . esc_html($co->{$who}) . "</td>" .
3405                       "<td rowspan=\"2\">" .
3406                       git_get_avatar($co->{"${who}_email"}, -size => 'double') .
3407                       "</td></tr>\n" .
3408                       "<tr>" .
3409                       "<td></td><td> $wd{'rfc2822'}";
3410                 print_local_time(%wd);
3411                 print "</td>" .
3412                       "</tr>\n";
3413         }
3414 }
3415
3416 sub git_print_page_path {
3417         my $name = shift;
3418         my $type = shift;
3419         my $hb = shift;
3420
3421
3422         print "<div class=\"page_path\">";
3423         print $cgi->a({-href => href(action=>"tree", hash_base=>$hb),
3424                       -title => 'tree root'}, to_utf8("[$project]"));
3425         print " / ";
3426         if (defined $name) {
3427                 my @dirname = split '/', $name;
3428                 my $basename = pop @dirname;
3429                 my $fullname = '';
3430
3431                 foreach my $dir (@dirname) {
3432                         $fullname .= ($fullname ? '/' : '') . $dir;
3433                         print $cgi->a({-href => href(action=>"tree", file_name=>$fullname,
3434                                                      hash_base=>$hb),
3435                                       -title => $fullname}, esc_path($dir));
3436                         print " / ";
3437                 }
3438                 if (defined $type && $type eq 'blob') {
3439                         print $cgi->a({-href => href(action=>"blob_plain", file_name=>$file_name,
3440                                                      hash_base=>$hb),
3441                                       -title => $name}, esc_path($basename));
3442                 } elsif (defined $type && $type eq 'tree') {
3443                         print $cgi->a({-href => href(action=>"tree", file_name=>$file_name,
3444                                                      hash_base=>$hb),
3445                                       -title => $name}, esc_path($basename));
3446                         print " / ";
3447                 } else {
3448                         print esc_path($basename);
3449                 }
3450         }
3451         print "<br/></div>\n";
3452 }
3453
3454 sub git_print_log {
3455         my $log = shift;
3456         my %opts = @_;
3457
3458         if ($opts{'-remove_title'}) {
3459                 # remove title, i.e. first line of log
3460                 shift @$log;
3461         }
3462         # remove leading empty lines
3463         while (defined $log->[0] && $log->[0] eq "") {
3464                 shift @$log;
3465         }
3466
3467         # print log
3468         my $signoff = 0;
3469         my $empty = 0;
3470         foreach my $line (@$log) {
3471                 if ($line =~ m/^ *(signed[ \-]off[ \-]by[ :]|acked[ \-]by[ :]|cc[ :])/i) {
3472                         $signoff = 1;
3473                         $empty = 0;
3474                         if (! $opts{'-remove_signoff'}) {
3475                                 print "<span class=\"signoff\">" . esc_html($line) . "</span><br/>\n";
3476                                 next;
3477                         } else {
3478                                 # remove signoff lines
3479                                 next;
3480                         }
3481                 } else {
3482                         $signoff = 0;
3483                 }
3484
3485                 # print only one empty line
3486                 # do not print empty line after signoff
3487                 if ($line eq "") {
3488                         next if ($empty || $signoff);
3489                         $empty = 1;
3490                 } else {
3491                         $empty = 0;
3492                 }
3493
3494                 print format_log_line_html($line) . "<br/>\n";
3495         }
3496
3497         if ($opts{'-final_empty_line'}) {
3498                 # end with single empty line
3499                 print "<br/>\n" unless $empty;
3500         }
3501 }
3502
3503 # return link target (what link points to)
3504 sub git_get_link_target {
3505         my $hash = shift;
3506         my $link_target;
3507
3508         # read link
3509         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
3510                 or return;
3511         {
3512                 local $/ = undef;
3513                 $link_target = <$fd>;
3514         }
3515         close $fd
3516                 or return;
3517
3518         return $link_target;
3519 }
3520
3521 # given link target, and the directory (basedir) the link is in,
3522 # return target of link relative to top directory (top tree);
3523 # return undef if it is not possible (including absolute links).
3524 sub normalize_link_target {
3525         my ($link_target, $basedir) = @_;
3526
3527         # absolute symlinks (beginning with '/') cannot be normalized
3528         return if (substr($link_target, 0, 1) eq '/');
3529
3530         # normalize link target to path from top (root) tree (dir)
3531         my $path;
3532         if ($basedir) {
3533                 $path = $basedir . '/' . $link_target;
3534         } else {
3535                 # we are in top (root) tree (dir)
3536                 $path = $link_target;
3537         }
3538
3539         # remove //, /./, and /../
3540         my @path_parts;
3541         foreach my $part (split('/', $path)) {
3542                 # discard '.' and ''
3543                 next if (!$part || $part eq '.');
3544                 # handle '..'
3545                 if ($part eq '..') {
3546                         if (@path_parts) {
3547                                 pop @path_parts;
3548                         } else {
3549                                 # link leads outside repository (outside top dir)
3550                                 return;
3551                         }
3552                 } else {
3553                         push @path_parts, $part;
3554                 }
3555         }
3556         $path = join('/', @path_parts);
3557
3558         return $path;
3559 }
3560
3561 # print tree entry (row of git_tree), but without encompassing <tr> element
3562 sub git_print_tree_entry {
3563         my ($t, $basedir, $hash_base, $have_blame) = @_;
3564
3565         my %base_key = ();
3566         $base_key{'hash_base'} = $hash_base if defined $hash_base;
3567
3568         # The format of a table row is: mode list link.  Where mode is
3569         # the mode of the entry, list is the name of the entry, an href,
3570         # and link is the action links of the entry.
3571
3572         print "<td class=\"mode\">" . mode_str($t->{'mode'}) . "</td>\n";
3573         if ($t->{'type'} eq "blob") {
3574                 print "<td class=\"list\">" .
3575                         $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3576                                                file_name=>"$basedir$t->{'name'}", %base_key),
3577                                 -class => "list"}, esc_path($t->{'name'}));
3578                 if (S_ISLNK(oct $t->{'mode'})) {
3579                         my $link_target = git_get_link_target($t->{'hash'});
3580                         if ($link_target) {
3581                                 my $norm_target = normalize_link_target($link_target, $basedir);
3582                                 if (defined $norm_target) {
3583                                         print " -> " .
3584                                               $cgi->a({-href => href(action=>"object", hash_base=>$hash_base,
3585                                                                      file_name=>$norm_target),
3586                                                        -title => $norm_target}, esc_path($link_target));
3587                                 } else {
3588                                         print " -> " . esc_path($link_target);
3589                                 }
3590                         }
3591                 }
3592                 print "</td>\n";
3593                 print "<td class=\"link\">";
3594                 print $cgi->a({-href => href(action=>"blob", hash=>$t->{'hash'},
3595                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3596                               "blob");
3597                 if ($have_blame) {
3598                         print " | " .
3599                               $cgi->a({-href => href(action=>"blame", hash=>$t->{'hash'},
3600                                                      file_name=>"$basedir$t->{'name'}", %base_key)},
3601                                       "blame");
3602                 }
3603                 if (defined $hash_base) {
3604                         print " | " .
3605                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3606                                                      hash=>$t->{'hash'}, file_name=>"$basedir$t->{'name'}")},
3607                                       "history");
3608                 }
3609                 print " | " .
3610                         $cgi->a({-href => href(action=>"blob_plain", hash_base=>$hash_base,
3611                                                file_name=>"$basedir$t->{'name'}")},
3612                                 "raw");
3613                 print "</td>\n";
3614
3615         } elsif ($t->{'type'} eq "tree") {
3616                 print "<td class=\"list\">";
3617                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3618                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3619                               esc_path($t->{'name'}));
3620                 print "</td>\n";
3621                 print "<td class=\"link\">";
3622                 print $cgi->a({-href => href(action=>"tree", hash=>$t->{'hash'},
3623                                              file_name=>"$basedir$t->{'name'}", %base_key)},
3624                               "tree");
3625                 if (defined $hash_base) {
3626                         print " | " .
3627                               $cgi->a({-href => href(action=>"history", hash_base=>$hash_base,
3628                                                      file_name=>"$basedir$t->{'name'}")},
3629                                       "history");
3630                 }
3631                 print "</td>\n";
3632         } else {
3633                 # unknown object: we can only present history for it
3634                 # (this includes 'commit' object, i.e. submodule support)
3635                 print "<td class=\"list\">" .
3636                       esc_path($t->{'name'}) .
3637                       "</td>\n";
3638                 print "<td class=\"link\">";
3639                 if (defined $hash_base) {
3640                         print $cgi->a({-href => href(action=>"history",
3641                                                      hash_base=>$hash_base,
3642                                                      file_name=>"$basedir$t->{'name'}")},
3643                                       "history");
3644                 }
3645                 print "</td>\n";
3646         }
3647 }
3648
3649 ## ......................................................................
3650 ## functions printing large fragments of HTML
3651
3652 # get pre-image filenames for merge (combined) diff
3653 sub fill_from_file_info {
3654         my ($diff, @parents) = @_;
3655
3656         $diff->{'from_file'} = [ ];
3657         $diff->{'from_file'}[$diff->{'nparents'} - 1] = undef;
3658         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3659                 if ($diff->{'status'}[$i] eq 'R' ||
3660                     $diff->{'status'}[$i] eq 'C') {
3661                         $diff->{'from_file'}[$i] =
3662                                 git_get_path_by_hash($parents[$i], $diff->{'from_id'}[$i]);
3663                 }
3664         }
3665
3666         return $diff;
3667 }
3668
3669 # is current raw difftree line of file deletion
3670 sub is_deleted {
3671         my $diffinfo = shift;
3672
3673         return $diffinfo->{'to_id'} eq ('0' x 40);
3674 }
3675
3676 # does patch correspond to [previous] difftree raw line
3677 # $diffinfo  - hashref of parsed raw diff format
3678 # $patchinfo - hashref of parsed patch diff format
3679 #              (the same keys as in $diffinfo)
3680 sub is_patch_split {
3681         my ($diffinfo, $patchinfo) = @_;
3682
3683         return defined $diffinfo && defined $patchinfo
3684                 && $diffinfo->{'to_file'} eq $patchinfo->{'to_file'};
3685 }
3686
3687
3688 sub git_difftree_body {
3689         my ($difftree, $hash, @parents) = @_;
3690         my ($parent) = $parents[0];
3691         my $have_blame = gitweb_check_feature('blame');
3692         print "<div class=\"list_head\">\n";
3693         if ($#{$difftree} > 10) {
3694                 print(($#{$difftree} + 1) . " files changed:\n");
3695         }
3696         print "</div>\n";
3697
3698         print "<table class=\"" .
3699               (@parents > 1 ? "combined " : "") .
3700               "diff_tree\">\n";
3701
3702         # header only for combined diff in 'commitdiff' view
3703         my $has_header = @$difftree && @parents > 1 && $action eq 'commitdiff';
3704         if ($has_header) {
3705                 # table header
3706                 print "<thead><tr>\n" .
3707                        "<th></th><th></th>\n"; # filename, patchN link
3708                 for (my $i = 0; $i < @parents; $i++) {
3709                         my $par = $parents[$i];
3710                         print "<th>" .
3711                               $cgi->a({-href => href(action=>"commitdiff",
3712                                                      hash=>$hash, hash_parent=>$par),
3713                                        -title => 'commitdiff to parent number ' .
3714                                                   ($i+1) . ': ' . substr($par,0,7)},
3715                                       $i+1) .
3716                               "&nbsp;</th>\n";
3717                 }
3718                 print "</tr></thead>\n<tbody>\n";
3719         }
3720
3721         my $alternate = 1;
3722         my $patchno = 0;
3723         foreach my $line (@{$difftree}) {
3724                 my $diff = parsed_difftree_line($line);
3725
3726                 if ($alternate) {
3727                         print "<tr class=\"dark\">\n";
3728                 } else {
3729                         print "<tr class=\"light\">\n";
3730                 }
3731                 $alternate ^= 1;
3732
3733                 if (exists $diff->{'nparents'}) { # combined diff
3734
3735                         fill_from_file_info($diff, @parents)
3736                                 unless exists $diff->{'from_file'};
3737
3738                         if (!is_deleted($diff)) {
3739                                 # file exists in the result (child) commit
3740                                 print "<td>" .
3741                                       $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3742                                                              file_name=>$diff->{'to_file'},
3743                                                              hash_base=>$hash),
3744                                               -class => "list"}, esc_path($diff->{'to_file'})) .
3745                                       "</td>\n";
3746                         } else {
3747                                 print "<td>" .
3748                                       esc_path($diff->{'to_file'}) .
3749                                       "</td>\n";
3750                         }
3751
3752                         if ($action eq 'commitdiff') {
3753                                 # link to patch
3754                                 $patchno++;
3755                                 print "<td class=\"link\">" .
3756                                       $cgi->a({-href => "#patch$patchno"}, "patch") .
3757                                       " | " .
3758                                       "</td>\n";
3759                         }
3760
3761                         my $has_history = 0;
3762                         my $not_deleted = 0;
3763                         for (my $i = 0; $i < $diff->{'nparents'}; $i++) {
3764                                 my $hash_parent = $parents[$i];
3765                                 my $from_hash = $diff->{'from_id'}[$i];
3766                                 my $from_path = $diff->{'from_file'}[$i];
3767                                 my $status = $diff->{'status'}[$i];
3768
3769                                 $has_history ||= ($status ne 'A');
3770                                 $not_deleted ||= ($status ne 'D');
3771
3772                                 if ($status eq 'A') {
3773                                         print "<td  class=\"link\" align=\"right\"> | </td>\n";
3774                                 } elsif ($status eq 'D') {
3775                                         print "<td class=\"link\">" .
3776                                               $cgi->a({-href => href(action=>"blob",
3777                                                                      hash_base=>$hash,
3778                                                                      hash=>$from_hash,
3779                                                                      file_name=>$from_path)},
3780                                                       "blob" . ($i+1)) .
3781                                               " | </td>\n";
3782                                 } else {
3783                                         if ($diff->{'to_id'} eq $from_hash) {
3784                                                 print "<td class=\"link nochange\">";
3785                                         } else {
3786                                                 print "<td class=\"link\">";
3787                                         }
3788                                         print $cgi->a({-href => href(action=>"blobdiff",
3789                                                                      hash=>$diff->{'to_id'},
3790                                                                      hash_parent=>$from_hash,
3791                                                                      hash_base=>$hash,
3792                                                                      hash_parent_base=>$hash_parent,
3793                                                                      file_name=>$diff->{'to_file'},
3794                                                                      file_parent=>$from_path)},
3795                                                       "diff" . ($i+1)) .
3796                                               " | </td>\n";
3797                                 }
3798                         }
3799
3800                         print "<td class=\"link\">";
3801                         if ($not_deleted) {
3802                                 print $cgi->a({-href => href(action=>"blob",
3803                                                              hash=>$diff->{'to_id'},
3804                                                              file_name=>$diff->{'to_file'},
3805                                                              hash_base=>$hash)},
3806                                               "blob");
3807                                 print " | " if ($has_history);
3808                         }
3809                         if ($has_history) {
3810                                 print $cgi->a({-href => href(action=>"history",
3811                                                              file_name=>$diff->{'to_file'},
3812                                                              hash_base=>$hash)},
3813                                               "history");
3814                         }
3815                         print "</td>\n";
3816
3817                         print "</tr>\n";
3818                         next; # instead of 'else' clause, to avoid extra indent
3819                 }
3820                 # else ordinary diff
3821
3822                 my ($to_mode_oct, $to_mode_str, $to_file_type);
3823                 my ($from_mode_oct, $from_mode_str, $from_file_type);
3824                 if ($diff->{'to_mode'} ne ('0' x 6)) {
3825                         $to_mode_oct = oct $diff->{'to_mode'};
3826                         if (S_ISREG($to_mode_oct)) { # only for regular file
3827                                 $to_mode_str = sprintf("%04o", $to_mode_oct & 0777); # permission bits
3828                         }
3829                         $to_file_type = file_type($diff->{'to_mode'});
3830                 }
3831                 if ($diff->{'from_mode'} ne ('0' x 6)) {
3832                         $from_mode_oct = oct $diff->{'from_mode'};
3833                         if (S_ISREG($to_mode_oct)) { # only for regular file
3834                                 $from_mode_str = sprintf("%04o", $from_mode_oct & 0777); # permission bits
3835                         }
3836                         $from_file_type = file_type($diff->{'from_mode'});
3837                 }
3838
3839                 if ($diff->{'status'} eq "A") { # created
3840                         my $mode_chng = "<span class=\"file_status new\">[new $to_file_type";
3841                         $mode_chng   .= " with mode: $to_mode_str" if $to_mode_str;
3842                         $mode_chng   .= "]</span>";
3843                         print "<td>";
3844                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3845                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3846                                       -class => "list"}, esc_path($diff->{'file'}));
3847                         print "</td>\n";
3848                         print "<td>$mode_chng</td>\n";
3849                         print "<td class=\"link\">";
3850                         if ($action eq 'commitdiff') {
3851                                 # link to patch
3852                                 $patchno++;
3853                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3854                                 print " | ";
3855                         }
3856                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3857                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3858                                       "blob");
3859                         print "</td>\n";
3860
3861                 } elsif ($diff->{'status'} eq "D") { # deleted
3862                         my $mode_chng = "<span class=\"file_status deleted\">[deleted $from_file_type]</span>";
3863                         print "<td>";
3864                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3865                                                      hash_base=>$parent, file_name=>$diff->{'file'}),
3866                                        -class => "list"}, esc_path($diff->{'file'}));
3867                         print "</td>\n";
3868                         print "<td>$mode_chng</td>\n";
3869                         print "<td class=\"link\">";
3870                         if ($action eq 'commitdiff') {
3871                                 # link to patch
3872                                 $patchno++;
3873                                 print $cgi->a({-href => "#patch$patchno"}, "patch");
3874                                 print " | ";
3875                         }
3876                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'from_id'},
3877                                                      hash_base=>$parent, file_name=>$diff->{'file'})},
3878                                       "blob") . " | ";
3879                         if ($have_blame) {
3880                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$parent,
3881                                                              file_name=>$diff->{'file'})},
3882                                               "blame") . " | ";
3883                         }
3884                         print $cgi->a({-href => href(action=>"history", hash_base=>$parent,
3885                                                      file_name=>$diff->{'file'})},
3886                                       "history");
3887                         print "</td>\n";
3888
3889                 } elsif ($diff->{'status'} eq "M" || $diff->{'status'} eq "T") { # modified, or type changed
3890                         my $mode_chnge = "";
3891                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3892                                 $mode_chnge = "<span class=\"file_status mode_chnge\">[changed";
3893                                 if ($from_file_type ne $to_file_type) {
3894                                         $mode_chnge .= " from $from_file_type to $to_file_type";
3895                                 }
3896                                 if (($from_mode_oct & 0777) != ($to_mode_oct & 0777)) {
3897                                         if ($from_mode_str && $to_mode_str) {
3898                                                 $mode_chnge .= " mode: $from_mode_str->$to_mode_str";
3899                                         } elsif ($to_mode_str) {
3900                                                 $mode_chnge .= " mode: $to_mode_str";
3901                                         }
3902                                 }
3903                                 $mode_chnge .= "]</span>\n";
3904                         }
3905                         print "<td>";
3906                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3907                                                      hash_base=>$hash, file_name=>$diff->{'file'}),
3908                                       -class => "list"}, esc_path($diff->{'file'}));
3909                         print "</td>\n";
3910                         print "<td>$mode_chnge</td>\n";
3911                         print "<td class=\"link\">";
3912                         if ($action eq 'commitdiff') {
3913                                 # link to patch
3914                                 $patchno++;
3915                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3916                                       " | ";
3917                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3918                                 # "commit" view and modified file (not onlu mode changed)
3919                                 print $cgi->a({-href => href(action=>"blobdiff",
3920                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3921                                                              hash_base=>$hash, hash_parent_base=>$parent,
3922                                                              file_name=>$diff->{'file'})},
3923                                               "diff") .
3924                                       " | ";
3925                         }
3926                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3927                                                      hash_base=>$hash, file_name=>$diff->{'file'})},
3928                                        "blob") . " | ";
3929                         if ($have_blame) {
3930                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3931                                                              file_name=>$diff->{'file'})},
3932                                               "blame") . " | ";
3933                         }
3934                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3935                                                      file_name=>$diff->{'file'})},
3936                                       "history");
3937                         print "</td>\n";
3938
3939                 } elsif ($diff->{'status'} eq "R" || $diff->{'status'} eq "C") { # renamed or copied
3940                         my %status_name = ('R' => 'moved', 'C' => 'copied');
3941                         my $nstatus = $status_name{$diff->{'status'}};
3942                         my $mode_chng = "";
3943                         if ($diff->{'from_mode'} != $diff->{'to_mode'}) {
3944                                 # mode also for directories, so we cannot use $to_mode_str
3945                                 $mode_chng = sprintf(", mode: %04o", $to_mode_oct & 0777);
3946                         }
3947                         print "<td>" .
3948                               $cgi->a({-href => href(action=>"blob", hash_base=>$hash,
3949                                                      hash=>$diff->{'to_id'}, file_name=>$diff->{'to_file'}),
3950                                       -class => "list"}, esc_path($diff->{'to_file'})) . "</td>\n" .
3951                               "<td><span class=\"file_status $nstatus\">[$nstatus from " .
3952                               $cgi->a({-href => href(action=>"blob", hash_base=>$parent,
3953                                                      hash=>$diff->{'from_id'}, file_name=>$diff->{'from_file'}),
3954                                       -class => "list"}, esc_path($diff->{'from_file'})) .
3955                               " with " . (int $diff->{'similarity'}) . "% similarity$mode_chng]</span></td>\n" .
3956                               "<td class=\"link\">";
3957                         if ($action eq 'commitdiff') {
3958                                 # link to patch
3959                                 $patchno++;
3960                                 print $cgi->a({-href => "#patch$patchno"}, "patch") .
3961                                       " | ";
3962                         } elsif ($diff->{'to_id'} ne $diff->{'from_id'}) {
3963                                 # "commit" view and modified file (not only pure rename or copy)
3964                                 print $cgi->a({-href => href(action=>"blobdiff",
3965                                                              hash=>$diff->{'to_id'}, hash_parent=>$diff->{'from_id'},
3966                                                              hash_base=>$hash, hash_parent_base=>$parent,
3967                                                              file_name=>$diff->{'to_file'}, file_parent=>$diff->{'from_file'})},
3968                                               "diff") .
3969                                       " | ";
3970                         }
3971                         print $cgi->a({-href => href(action=>"blob", hash=>$diff->{'to_id'},
3972                                                      hash_base=>$parent, file_name=>$diff->{'to_file'})},
3973                                       "blob") . " | ";
3974                         if ($have_blame) {
3975                                 print $cgi->a({-href => href(action=>"blame", hash_base=>$hash,
3976                                                              file_name=>$diff->{'to_file'})},
3977                                               "blame") . " | ";
3978                         }
3979                         print $cgi->a({-href => href(action=>"history", hash_base=>$hash,
3980                                                     file_name=>$diff->{'to_file'})},
3981                                       "history");
3982                         print "</td>\n";
3983
3984                 } # we should not encounter Unmerged (U) or Unknown (X) status
3985                 print "</tr>\n";
3986         }
3987         print "</tbody>" if $has_header;
3988         print "</table>\n";
3989 }
3990
3991 sub git_patchset_body {
3992         my ($fd, $difftree, $hash, @hash_parents) = @_;
3993         my ($hash_parent) = $hash_parents[0];
3994
3995         my $is_combined = (@hash_parents > 1);
3996         my $patch_idx = 0;
3997         my $patch_number = 0;
3998         my $patch_line;
3999         my $diffinfo;
4000         my $to_name;
4001         my (%from, %to);
4002
4003         print "<div class=\"patchset\">\n";
4004
4005         # skip to first patch
4006         while ($patch_line = <$fd>) {
4007                 chomp $patch_line;
4008
4009                 last if ($patch_line =~ m/^diff /);
4010         }
4011
4012  PATCH:
4013         while ($patch_line) {
4014
4015                 # parse "git diff" header line
4016                 if ($patch_line =~ m/^diff --git (\"(?:[^\\\"]*(?:\\.[^\\\"]*)*)\"|[^ "]*) (.*)$/) {
4017                         # $1 is from_name, which we do not use
4018                         $to_name = unquote($2);
4019                         $to_name =~ s!^b/!!;
4020                 } elsif ($patch_line =~ m/^diff --(cc|combined) ("?.*"?)$/) {
4021                         # $1 is 'cc' or 'combined', which we do not use
4022                         $to_name = unquote($2);
4023                 } else {
4024                         $to_name = undef;
4025                 }
4026
4027                 # check if current patch belong to current raw line
4028                 # and parse raw git-diff line if needed
4029                 if (is_patch_split($diffinfo, { 'to_file' => $to_name })) {
4030                         # this is continuation of a split patch
4031                         print "<div class=\"patch cont\">\n";
4032                 } else {
4033                         # advance raw git-diff output if needed
4034                         $patch_idx++ if defined $diffinfo;
4035
4036                         # read and prepare patch information
4037                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4038
4039                         # compact combined diff output can have some patches skipped
4040                         # find which patch (using pathname of result) we are at now;
4041                         if ($is_combined) {
4042                                 while ($to_name ne $diffinfo->{'to_file'}) {
4043                                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4044                                               format_diff_cc_simplified($diffinfo, @hash_parents) .
4045                                               "</div>\n";  # class="patch"
4046
4047                                         $patch_idx++;
4048                                         $patch_number++;
4049
4050                                         last if $patch_idx > $#$difftree;
4051                                         $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4052                                 }
4053                         }
4054
4055                         # modifies %from, %to hashes
4056                         parse_from_to_diffinfo($diffinfo, \%from, \%to, @hash_parents);
4057
4058                         # this is first patch for raw difftree line with $patch_idx index
4059                         # we index @$difftree array from 0, but number patches from 1
4060                         print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n";
4061                 }
4062
4063                 # git diff header
4064                 #assert($patch_line =~ m/^diff /) if DEBUG;
4065                 #assert($patch_line !~ m!$/$!) if DEBUG; # is chomp-ed
4066                 $patch_number++;
4067                 # print "git diff" header
4068                 print format_git_diff_header_line($patch_line, $diffinfo,
4069                                                   \%from, \%to);
4070
4071                 # print extended diff header
4072                 print "<div class=\"diff extended_header\">\n";
4073         EXTENDED_HEADER:
4074                 while ($patch_line = <$fd>) {
4075                         chomp $patch_line;
4076
4077                         last EXTENDED_HEADER if ($patch_line =~ m/^--- |^diff /);
4078
4079                         print format_extended_diff_header_line($patch_line, $diffinfo,
4080                                                                \%from, \%to);
4081                 }
4082                 print "</div>\n"; # class="diff extended_header"
4083
4084                 # from-file/to-file diff header
4085                 if (! $patch_line) {
4086                         print "</div>\n"; # class="patch"
4087                         last PATCH;
4088                 }
4089                 next PATCH if ($patch_line =~ m/^diff /);
4090                 #assert($patch_line =~ m/^---/) if DEBUG;
4091
4092                 my $last_patch_line = $patch_line;
4093                 $patch_line = <$fd>;
4094                 chomp $patch_line;
4095                 #assert($patch_line =~ m/^\+\+\+/) if DEBUG;
4096
4097                 print format_diff_from_to_header($last_patch_line, $patch_line,
4098                                                  $diffinfo, \%from, \%to,
4099                                                  @hash_parents);
4100
4101                 # the patch itself
4102         LINE:
4103                 while ($patch_line = <$fd>) {
4104                         chomp $patch_line;
4105
4106                         next PATCH if ($patch_line =~ m/^diff /);
4107
4108                         print format_diff_line($patch_line, \%from, \%to);
4109                 }
4110
4111         } continue {
4112                 print "</div>\n"; # class="patch"
4113         }
4114
4115         # for compact combined (--cc) format, with chunk and patch simpliciaction
4116         # patchset might be empty, but there might be unprocessed raw lines
4117         for (++$patch_idx if $patch_number > 0;
4118              $patch_idx < @$difftree;
4119              ++$patch_idx) {
4120                 # read and prepare patch information
4121                 $diffinfo = parsed_difftree_line($difftree->[$patch_idx]);
4122
4123                 # generate anchor for "patch" links in difftree / whatchanged part
4124                 print "<div class=\"patch\" id=\"patch". ($patch_idx+1) ."\">\n" .
4125                       format_diff_cc_simplified($diffinfo, @hash_parents) .
4126                       "</div>\n";  # class="patch"
4127
4128                 $patch_number++;
4129         }
4130
4131         if ($patch_number == 0) {
4132                 if (@hash_parents > 1) {
4133                         print "<div class=\"diff nodifferences\">Trivial merge</div>\n";
4134                 } else {
4135                         print "<div class=\"diff nodifferences\">No differences found</div>\n";
4136                 }
4137         }
4138
4139         print "</div>\n"; # class="patchset"
4140 }
4141
4142 # . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4143
4144 # fills project list info (age, description, owner, forks) for each
4145 # project in the list, removing invalid projects from returned list
4146 # NOTE: modifies $projlist, but does not remove entries from it
4147 sub fill_project_list_info {
4148         my ($projlist, $check_forks) = @_;
4149         my @projects;
4150
4151         my $show_ctags = gitweb_check_feature('ctags');
4152  PROJECT:
4153         foreach my $pr (@$projlist) {
4154                 my (@activity) = git_get_last_activity($pr->{'path'});
4155                 unless (@activity) {
4156                         next PROJECT;
4157                 }
4158                 ($pr->{'age'}, $pr->{'age_string'}) = @activity;
4159                 if (!defined $pr->{'descr'}) {
4160                         my $descr = git_get_project_description($pr->{'path'}) || "";
4161                         $descr = to_utf8($descr);
4162                         $pr->{'descr_long'} = $descr;
4163                         $pr->{'descr'} = chop_str($descr, $projects_list_description_width, 5);
4164                 }
4165                 if (!defined $pr->{'owner'}) {
4166                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}") || "";
4167                 }
4168                 if ($check_forks) {
4169                         my $pname = $pr->{'path'};
4170                         if (($pname =~ s/\.git$//) &&
4171                             ($pname !~ /\/$/) &&
4172                             (-d "$projectroot/$pname")) {
4173                                 $pr->{'forks'} = "-d $projectroot/$pname";
4174                         } else {
4175                                 $pr->{'forks'} = 0;
4176                         }
4177                 }
4178                 $show_ctags and $pr->{'ctags'} = git_get_project_ctags($pr->{'path'});
4179                 push @projects, $pr;
4180         }
4181
4182         return @projects;
4183 }
4184
4185 # print 'sort by' <th> element, generating 'sort by $name' replay link
4186 # if that order is not selected
4187 sub print_sort_th {
4188         my ($name, $order, $header) = @_;
4189         $header ||= ucfirst($name);
4190
4191         if ($order eq $name) {
4192                 print "<th>$header</th>\n";
4193         } else {
4194                 print "<th>" .
4195                       $cgi->a({-href => href(-replay=>1, order=>$name),
4196                                -class => "header"}, $header) .
4197                       "</th>\n";
4198         }
4199 }
4200
4201 sub git_project_list_body {
4202         # actually uses global variable $project
4203         my ($projlist, $order, $from, $to, $extra, $no_header) = @_;
4204
4205         my $check_forks = gitweb_check_feature('forks');
4206         my @projects = fill_project_list_info($projlist, $check_forks);
4207
4208         $order ||= $default_projects_order;
4209         $from = 0 unless defined $from;
4210         $to = $#projects if (!defined $to || $#projects < $to);
4211
4212         my %order_info = (
4213                 project => { key => 'path', type => 'str' },
4214                 descr => { key => 'descr_long', type => 'str' },
4215                 owner => { key => 'owner', type => 'str' },
4216                 age => { key => 'age', type => 'num' }
4217         );
4218         my $oi = $order_info{$order};
4219         if ($oi->{'type'} eq 'str') {
4220                 @projects = sort {$a->{$oi->{'key'}} cmp $b->{$oi->{'key'}}} @projects;
4221         } else {
4222                 @projects = sort {$a->{$oi->{'key'}} <=> $b->{$oi->{'key'}}} @projects;
4223         }
4224
4225         my $show_ctags = gitweb_check_feature('ctags');
4226         if ($show_ctags) {
4227                 my %ctags;
4228                 foreach my $p (@projects) {
4229                         foreach my $ct (keys %{$p->{'ctags'}}) {
4230                                 $ctags{$ct} += $p->{'ctags'}->{$ct};
4231                         }
4232                 }
4233                 my $cloud = git_populate_project_tagcloud(\%ctags);
4234                 print git_show_project_tagcloud($cloud, 64);
4235         }
4236
4237         print "<table class=\"project_list\">\n";
4238         unless ($no_header) {
4239                 print "<tr>\n";
4240                 if ($check_forks) {
4241                         print "<th></th>\n";
4242                 }
4243                 print_sort_th('project', $order, 'Project');
4244                 print_sort_th('descr', $order, 'Description');
4245                 print_sort_th('owner', $order, 'Owner');
4246                 print_sort_th('age', $order, 'Last Change');
4247                 print "<th></th>\n" . # for links
4248                       "</tr>\n";
4249         }
4250         my $alternate = 1;
4251         my $tagfilter = $cgi->param('by_tag');
4252         for (my $i = $from; $i <= $to; $i++) {
4253                 my $pr = $projects[$i];
4254
4255                 next if $tagfilter and $show_ctags and not grep { lc $_ eq lc $tagfilter } keys %{$pr->{'ctags'}};
4256                 next if $searchtext and not $pr->{'path'} =~ /$searchtext/
4257                         and not $pr->{'descr_long'} =~ /$searchtext/;
4258                 # Weed out forks or non-matching entries of search
4259                 if ($check_forks) {
4260                         my $forkbase = $project; $forkbase ||= ''; $forkbase =~ s#\.git$#/#;
4261                         $forkbase="^$forkbase" if $forkbase;
4262                         next if not $searchtext and not $tagfilter and $show_ctags
4263                                 and $pr->{'path'} =~ m#$forkbase.*/.*#; # regexp-safe
4264                 }
4265
4266                 if ($alternate) {
4267                         print "<tr class=\"dark\">\n";
4268                 } else {
4269                         print "<tr class=\"light\">\n";
4270                 }
4271                 $alternate ^= 1;
4272                 if ($check_forks) {
4273                         print "<td>";
4274                         if ($pr->{'forks'}) {
4275                                 print "<!-- $pr->{'forks'} -->\n";
4276                                 print $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "+");
4277                         }
4278                         print "</td>\n";
4279                 }
4280                 print "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4281                                         -class => "list"}, esc_html($pr->{'path'})) . "</td>\n" .
4282                       "<td>" . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary"),
4283                                         -class => "list", -title => $pr->{'descr_long'}},
4284                                         esc_html($pr->{'descr'})) . "</td>\n" .
4285                       "<td><i>" . chop_and_escape_str($pr->{'owner'}, 15) . "</i></td>\n";
4286                 print "<td class=\"". age_class($pr->{'age'}) . "\">" .
4287                       (defined $pr->{'age_string'} ? $pr->{'age_string'} : "No commits") . "</td>\n" .
4288                       "<td class=\"link\">" .
4289                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"summary")}, "summary")   . " | " .
4290                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"shortlog")}, "shortlog") . " | " .
4291                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"log")}, "log") . " | " .
4292                       $cgi->a({-href => href(project=>$pr->{'path'}, action=>"tree")}, "tree") .
4293                       ($pr->{'forks'} ? " | " . $cgi->a({-href => href(project=>$pr->{'path'}, action=>"forks")}, "forks") : '') .
4294                       "</td>\n" .
4295                       "</tr>\n";
4296         }
4297         if (defined $extra) {
4298                 print "<tr>\n";
4299                 if ($check_forks) {
4300                         print "<td></td>\n";
4301                 }
4302                 print "<td colspan=\"5\">$extra</td>\n" .
4303                       "</tr>\n";
4304         }
4305         print "</table>\n";
4306 }
4307
4308 sub git_shortlog_body {
4309         # uses global variable $project
4310         my ($commitlist, $from, $to, $refs, $extra) = @_;
4311
4312         $from = 0 unless defined $from;
4313         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4314
4315         print "<table class=\"shortlog\">\n";
4316         my $alternate = 1;
4317         for (my $i = $from; $i <= $to; $i++) {
4318                 my %co = %{$commitlist->[$i]};
4319                 my $commit = $co{'id'};
4320                 my $ref = format_ref_marker($refs, $commit);
4321                 if ($alternate) {
4322                         print "<tr class=\"dark\">\n";
4323                 } else {
4324                         print "<tr class=\"light\">\n";
4325                 }
4326                 $alternate ^= 1;
4327                 # git_summary() used print "<td><i>$co{'age_string'}</i></td>\n" .
4328                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4329                       format_author_html('td', \%co, 10) . "<td>";
4330                 print format_subject_html($co{'title'}, $co{'title_short'},
4331                                           href(action=>"commit", hash=>$commit), $ref);
4332                 print "</td>\n" .
4333                       "<td class=\"link\">" .
4334                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") . " | " .
4335                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") . " | " .
4336                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree");
4337                 my $snapshot_links = format_snapshot_links($commit);
4338                 if (defined $snapshot_links) {
4339                         print " | " . $snapshot_links;
4340                 }
4341                 print "</td>\n" .
4342                       "</tr>\n";
4343         }
4344         if (defined $extra) {
4345                 print "<tr>\n" .
4346                       "<td colspan=\"4\">$extra</td>\n" .
4347                       "</tr>\n";
4348         }
4349         print "</table>\n";
4350 }
4351
4352 sub git_history_body {
4353         # Warning: assumes constant type (blob or tree) during history
4354         my ($commitlist, $from, $to, $refs, $hash_base, $ftype, $extra) = @_;
4355
4356         $from = 0 unless defined $from;
4357         $to = $#{$commitlist} unless (defined $to && $to <= $#{$commitlist});
4358
4359         print "<table class=\"history\">\n";
4360         my $alternate = 1;
4361         for (my $i = $from; $i <= $to; $i++) {
4362                 my %co = %{$commitlist->[$i]};
4363                 if (!%co) {
4364                         next;
4365                 }
4366                 my $commit = $co{'id'};
4367
4368                 my $ref = format_ref_marker($refs, $commit);
4369
4370                 if ($alternate) {
4371                         print "<tr class=\"dark\">\n";
4372                 } else {
4373                         print "<tr class=\"light\">\n";
4374                 }
4375                 $alternate ^= 1;
4376                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4377         # shortlog:   format_author_html('td', \%co, 10)
4378                       format_author_html('td', \%co, 15, 3) . "<td>";
4379                 # originally git_history used chop_str($co{'title'}, 50)
4380                 print format_subject_html($co{'title'}, $co{'title_short'},
4381                                           href(action=>"commit", hash=>$commit), $ref);
4382                 print "</td>\n" .
4383                       "<td class=\"link\">" .
4384                       $cgi->a({-href => href(action=>$ftype, hash_base=>$commit, file_name=>$file_name)}, $ftype) . " | " .
4385                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff");
4386
4387                 if ($ftype eq 'blob') {
4388                         my $blob_current = git_get_hash_by_path($hash_base, $file_name);
4389                         my $blob_parent  = git_get_hash_by_path($commit, $file_name);
4390                         if (defined $blob_current && defined $blob_parent &&
4391                                         $blob_current ne $blob_parent) {
4392                                 print " | " .
4393                                         $cgi->a({-href => href(action=>"blobdiff",
4394                                                                hash=>$blob_current, hash_parent=>$blob_parent,
4395                                                                hash_base=>$hash_base, hash_parent_base=>$commit,
4396                                                                file_name=>$file_name)},
4397                                                 "diff to current");
4398                         }
4399                 }
4400                 print "</td>\n" .
4401                       "</tr>\n";
4402         }
4403         if (defined $extra) {
4404                 print "<tr>\n" .
4405                       "<td colspan=\"4\">$extra</td>\n" .
4406                       "</tr>\n";
4407         }
4408         print "</table>\n";
4409 }
4410
4411 sub git_tags_body {
4412         # uses global variable $project
4413         my ($taglist, $from, $to, $extra) = @_;
4414         $from = 0 unless defined $from;
4415         $to = $#{$taglist} if (!defined $to || $#{$taglist} < $to);
4416
4417         print "<table class=\"tags\">\n";
4418         my $alternate = 1;
4419         for (my $i = $from; $i <= $to; $i++) {
4420                 my $entry = $taglist->[$i];
4421                 my %tag = %$entry;
4422                 my $comment = $tag{'subject'};
4423                 my $comment_short;
4424                 if (defined $comment) {
4425                         $comment_short = chop_str($comment, 30, 5);
4426                 }
4427                 if ($alternate) {
4428                         print "<tr class=\"dark\">\n";
4429                 } else {
4430                         print "<tr class=\"light\">\n";
4431                 }
4432                 $alternate ^= 1;
4433                 if (defined $tag{'age'}) {
4434                         print "<td><i>$tag{'age'}</i></td>\n";
4435                 } else {
4436                         print "<td></td>\n";
4437                 }
4438                 print "<td>" .
4439                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'}),
4440                                -class => "list name"}, esc_html($tag{'name'})) .
4441                       "</td>\n" .
4442                       "<td>";
4443                 if (defined $comment) {
4444                         print format_subject_html($comment, $comment_short,
4445                                                   href(action=>"tag", hash=>$tag{'id'}));
4446                 }
4447                 print "</td>\n" .
4448                       "<td class=\"selflink\">";
4449                 if ($tag{'type'} eq "tag") {
4450                         print $cgi->a({-href => href(action=>"tag", hash=>$tag{'id'})}, "tag");
4451                 } else {
4452                         print "&nbsp;";
4453                 }
4454                 print "</td>\n" .
4455                       "<td class=\"link\">" . " | " .
4456                       $cgi->a({-href => href(action=>$tag{'reftype'}, hash=>$tag{'refid'})}, $tag{'reftype'});
4457                 if ($tag{'reftype'} eq "commit") {
4458                         print " | " . $cgi->a({-href => href(action=>"shortlog", hash=>$tag{'fullname'})}, "shortlog") .
4459                               " | " . $cgi->a({-href => href(action=>"log", hash=>$tag{'fullname'})}, "log");
4460                 } elsif ($tag{'reftype'} eq "blob") {
4461                         print " | " . $cgi->a({-href => href(action=>"blob_plain", hash=>$tag{'refid'})}, "raw");
4462                 }
4463                 print "</td>\n" .
4464                       "</tr>";
4465         }
4466         if (defined $extra) {
4467                 print "<tr>\n" .
4468                       "<td colspan=\"5\">$extra</td>\n" .
4469                       "</tr>\n";
4470         }
4471         print "</table>\n";
4472 }
4473
4474 sub git_heads_body {
4475         # uses global variable $project
4476         my ($headlist, $head, $from, $to, $extra) = @_;
4477         $from = 0 unless defined $from;
4478         $to = $#{$headlist} if (!defined $to || $#{$headlist} < $to);
4479
4480         print "<table class=\"heads\">\n";
4481         my $alternate = 1;
4482         for (my $i = $from; $i <= $to; $i++) {
4483                 my $entry = $headlist->[$i];
4484                 my %ref = %$entry;
4485                 my $curr = $ref{'id'} eq $head;
4486                 if ($alternate) {
4487                         print "<tr class=\"dark\">\n";
4488                 } else {
4489                         print "<tr class=\"light\">\n";
4490                 }
4491                 $alternate ^= 1;
4492                 print "<td><i>$ref{'age'}</i></td>\n" .
4493                       ($curr ? "<td class=\"current_head\">" : "<td>") .
4494                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'}),
4495                                -class => "list name"},esc_html($ref{'name'})) .
4496                       "</td>\n" .
4497                       "<td class=\"link\">" .
4498                       $cgi->a({-href => href(action=>"shortlog", hash=>$ref{'fullname'})}, "shortlog") . " | " .
4499                       $cgi->a({-href => href(action=>"log", hash=>$ref{'fullname'})}, "log") . " | " .
4500                       $cgi->a({-href => href(action=>"tree", hash=>$ref{'fullname'}, hash_base=>$ref{'name'})}, "tree") .
4501                       "</td>\n" .
4502                       "</tr>";
4503         }
4504         if (defined $extra) {
4505                 print "<tr>\n" .
4506                       "<td colspan=\"3\">$extra</td>\n" .
4507                       "</tr>\n";
4508         }
4509         print "</table>\n";
4510 }
4511
4512 sub git_search_grep_body {
4513         my ($commitlist, $from, $to, $extra) = @_;
4514         $from = 0 unless defined $from;
4515         $to = $#{$commitlist} if (!defined $to || $#{$commitlist} < $to);
4516
4517         print "<table class=\"commit_search\">\n";
4518         my $alternate = 1;
4519         for (my $i = $from; $i <= $to; $i++) {
4520                 my %co = %{$commitlist->[$i]};
4521                 if (!%co) {
4522                         next;
4523                 }
4524                 my $commit = $co{'id'};
4525                 if ($alternate) {
4526                         print "<tr class=\"dark\">\n";
4527                 } else {
4528                         print "<tr class=\"light\">\n";
4529                 }
4530                 $alternate ^= 1;
4531                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
4532                       format_author_html('td', \%co, 15, 5) .
4533                       "<td>" .
4534                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
4535                                -class => "list subject"},
4536                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
4537                 my $comment = $co{'comment'};
4538                 foreach my $line (@$comment) {
4539                         if ($line =~ m/^(.*?)($search_regexp)(.*)$/i) {
4540                                 my ($lead, $match, $trail) = ($1, $2, $3);
4541                                 $match = chop_str($match, 70, 5, 'center');
4542                                 my $contextlen = int((80 - length($match))/2);
4543                                 $contextlen = 30 if ($contextlen > 30);
4544                                 $lead  = chop_str($lead,  $contextlen, 10, 'left');
4545                                 $trail = chop_str($trail, $contextlen, 10, 'right');
4546
4547                                 $lead  = esc_html($lead);
4548                                 $match = esc_html($match);
4549                                 $trail = esc_html($trail);
4550
4551                                 print "$lead<span class=\"match\">$match</span>$trail<br />";
4552                         }
4553                 }
4554                 print "</td>\n" .
4555                       "<td class=\"link\">" .
4556                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
4557                       " | " .
4558                       $cgi->a({-href => href(action=>"commitdiff", hash=>$co{'id'})}, "commitdiff") .
4559                       " | " .
4560                       $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
4561                 print "</td>\n" .
4562                       "</tr>\n";
4563         }
4564         if (defined $extra) {
4565                 print "<tr>\n" .
4566                       "<td colspan=\"3\">$extra</td>\n" .
4567                       "</tr>\n";
4568         }
4569         print "</table>\n";
4570 }
4571
4572 ## ======================================================================
4573 ## ======================================================================
4574 ## actions
4575
4576 sub git_project_list {
4577         my $order = $input_params{'order'};
4578         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4579                 die_error(400, "Unknown order parameter");
4580         }
4581
4582         my @list = git_get_projects_list();
4583         if (!@list) {
4584                 die_error(404, "No projects found");
4585         }
4586
4587         git_header_html();
4588         if (-f $home_text) {
4589                 print "<div class=\"index_include\">\n";
4590                 insert_file($home_text);
4591                 print "</div>\n";
4592         }
4593         print $cgi->startform(-method => "get") .
4594               "<p class=\"projsearch\">Search:\n" .
4595               $cgi->textfield(-name => "s", -value => $searchtext) . "\n" .
4596               "</p>" .
4597               $cgi->end_form() . "\n";
4598         git_project_list_body(\@list, $order);
4599         git_footer_html();
4600 }
4601
4602 sub git_forks {
4603         my $order = $input_params{'order'};
4604         if (defined $order && $order !~ m/none|project|descr|owner|age/) {
4605                 die_error(400, "Unknown order parameter");
4606         }
4607
4608         my @list = git_get_projects_list($project);
4609         if (!@list) {
4610                 die_error(404, "No forks found");
4611         }
4612
4613         git_header_html();
4614         git_print_page_nav('','');
4615         git_print_header_div('summary', "$project forks");
4616         git_project_list_body(\@list, $order);
4617         git_footer_html();
4618 }
4619
4620 sub git_project_index {
4621         my @projects = git_get_projects_list($project);
4622
4623         print $cgi->header(
4624                 -type => 'text/plain',
4625                 -charset => 'utf-8',
4626                 -content_disposition => 'inline; filename="index.aux"');
4627
4628         foreach my $pr (@projects) {
4629                 if (!exists $pr->{'owner'}) {
4630                         $pr->{'owner'} = git_get_project_owner("$pr->{'path'}");
4631                 }
4632
4633                 my ($path, $owner) = ($pr->{'path'}, $pr->{'owner'});
4634                 # quote as in CGI::Util::encode, but keep the slash, and use '+' for ' '
4635                 $path  =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4636                 $owner =~ s/([^a-zA-Z0-9_.\-\/ ])/sprintf("%%%02X", ord($1))/eg;
4637                 $path  =~ s/ /\+/g;
4638                 $owner =~ s/ /\+/g;
4639
4640                 print "$path $owner\n";
4641         }
4642 }
4643
4644 sub git_summary {
4645         my $descr = git_get_project_description($project) || "none";
4646         my %co = parse_commit("HEAD");
4647         my %cd = %co ? parse_date($co{'committer_epoch'}, $co{'committer_tz'}) : ();
4648         my $head = $co{'id'};
4649
4650         my $owner = git_get_project_owner($project);
4651
4652         my $refs = git_get_references();
4653         # These get_*_list functions return one more to allow us to see if
4654         # there are more ...
4655         my @taglist  = git_get_tags_list(16);
4656         my @headlist = git_get_heads_list(16);
4657         my @forklist;
4658         my $check_forks = gitweb_check_feature('forks');
4659
4660         if ($check_forks) {
4661                 @forklist = git_get_projects_list($project);
4662         }
4663
4664         git_header_html();
4665         git_print_page_nav('summary','', $head);
4666
4667         print "<div class=\"title\">&nbsp;</div>\n";
4668         print "<table class=\"projects_list\">\n" .
4669               "<tr id=\"metadata_desc\"><td>description</td><td>" . esc_html($descr) . "</td></tr>\n" .
4670               "<tr id=\"metadata_owner\"><td>owner</td><td>" . esc_html($owner) . "</td></tr>\n";
4671         if (defined $cd{'rfc2822'}) {
4672                 print "<tr id=\"metadata_lchange\"><td>last change</td><td>$cd{'rfc2822'}</td></tr>\n";
4673         }
4674
4675         # use per project git URL list in $projectroot/$project/cloneurl
4676         # or make project git URL from git base URL and project name
4677         my $url_tag = "URL";
4678         my @url_list = git_get_project_url_list($project);
4679         @url_list = map { "$_/$project" } @git_base_url_list unless @url_list;
4680         foreach my $git_url (@url_list) {
4681                 next unless $git_url;
4682                 print "<tr class=\"metadata_url\"><td>$url_tag</td><td>$git_url</td></tr>\n";
4683                 $url_tag = "";
4684         }
4685
4686         # Tag cloud
4687         my $show_ctags = gitweb_check_feature('ctags');
4688         if ($show_ctags) {
4689                 my $ctags = git_get_project_ctags($project);
4690                 my $cloud = git_populate_project_tagcloud($ctags);
4691                 print "<tr id=\"metadata_ctags\"><td>Content tags:<br />";
4692                 print "</td>\n<td>" unless %$ctags;
4693                 print "<form action=\"$show_ctags\" method=\"post\"><input type=\"hidden\" name=\"p\" value=\"$project\" />Add: <input type=\"text\" name=\"t\" size=\"8\" /></form>";
4694                 print "</td>\n<td>" if %$ctags;
4695                 print git_show_project_tagcloud($cloud, 48);
4696                 print "</td></tr>";
4697         }
4698
4699         print "</table>\n";
4700
4701         # If XSS prevention is on, we don't include README.html.
4702         # TODO: Allow a readme in some safe format.
4703         if (!$prevent_xss && -s "$projectroot/$project/README.html") {
4704                 print "<div class=\"title\">readme</div>\n" .
4705                       "<div class=\"readme\">\n";
4706                 insert_file("$projectroot/$project/README.html");
4707                 print "\n</div>\n"; # class="readme"
4708         }
4709
4710         # we need to request one more than 16 (0..15) to check if
4711         # those 16 are all
4712         my @commitlist = $head ? parse_commits($head, 17) : ();
4713         if (@commitlist) {
4714                 git_print_header_div('shortlog');
4715                 git_shortlog_body(\@commitlist, 0, 15, $refs,
4716                                   $#commitlist <=  15 ? undef :
4717                                   $cgi->a({-href => href(action=>"shortlog")}, "..."));
4718         }
4719
4720         if (@taglist) {
4721                 git_print_header_div('tags');
4722                 git_tags_body(\@taglist, 0, 15,
4723                               $#taglist <=  15 ? undef :
4724                               $cgi->a({-href => href(action=>"tags")}, "..."));
4725         }
4726
4727         if (@headlist) {
4728                 git_print_header_div('heads');
4729                 git_heads_body(\@headlist, $head, 0, 15,
4730                                $#headlist <= 15 ? undef :
4731                                $cgi->a({-href => href(action=>"heads")}, "..."));
4732         }
4733
4734         if (@forklist) {
4735                 git_print_header_div('forks');
4736                 git_project_list_body(\@forklist, 'age', 0, 15,
4737                                       $#forklist <= 15 ? undef :
4738                                       $cgi->a({-href => href(action=>"forks")}, "..."),
4739                                       'no_header');
4740         }
4741
4742         git_footer_html();
4743 }
4744
4745 sub git_tag {
4746         my $head = git_get_head_hash($project);
4747         git_header_html();
4748         git_print_page_nav('','', $head,undef,$head);
4749         my %tag = parse_tag($hash);
4750
4751         if (! %tag) {
4752                 die_error(404, "Unknown tag object");
4753         }
4754
4755         git_print_header_div('commit', esc_html($tag{'name'}), $hash);
4756         print "<div class=\"title_text\">\n" .
4757               "<table class=\"object_header\">\n" .
4758               "<tr>\n" .
4759               "<td>object</td>\n" .
4760               "<td>" . $cgi->a({-class => "list", -href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4761                                $tag{'object'}) . "</td>\n" .
4762               "<td class=\"link\">" . $cgi->a({-href => href(action=>$tag{'type'}, hash=>$tag{'object'})},
4763                                               $tag{'type'}) . "</td>\n" .
4764               "</tr>\n";
4765         if (defined($tag{'author'})) {
4766                 git_print_authorship_rows(\%tag, 'author');
4767         }
4768         print "</table>\n\n" .
4769               "</div>\n";
4770         print "<div class=\"page_body\">";
4771         my $comment = $tag{'comment'};
4772         foreach my $line (@$comment) {
4773                 chomp $line;
4774                 print esc_html($line, -nbsp=>1) . "<br/>\n";
4775         }
4776         print "</div>\n";
4777         git_footer_html();
4778 }
4779
4780 sub git_blame {
4781         # permissions
4782         gitweb_check_feature('blame')
4783                 or die_error(403, "Blame view not allowed");
4784
4785         # error checking
4786         die_error(400, "No file name given") unless $file_name;
4787         $hash_base ||= git_get_head_hash($project);
4788         die_error(404, "Couldn't find base commit") unless $hash_base;
4789         my %co = parse_commit($hash_base)
4790                 or die_error(404, "Commit not found");
4791         my $ftype = "blob";
4792         if (!defined $hash) {
4793                 $hash = git_get_hash_by_path($hash_base, $file_name, "blob")
4794                         or die_error(404, "Error looking up file");
4795         } else {
4796                 $ftype = git_get_type($hash);
4797                 if ($ftype !~ "blob") {
4798                         die_error(400, "Object is not a blob");
4799                 }
4800         }
4801
4802         # run git-blame --porcelain
4803         open my $fd, "-|", git_cmd(), "blame", '-p',
4804                 $hash_base, '--', $file_name
4805                 or die_error(500, "Open git-blame failed");
4806
4807         # page header
4808         git_header_html();
4809         my $formats_nav =
4810                 $cgi->a({-href => href(action=>"blob", -replay=>1)},
4811                         "blob") .
4812                 " | " .
4813                 $cgi->a({-href => href(action=>"history", -replay=>1)},
4814                         "history") .
4815                 " | " .
4816                 $cgi->a({-href => href(action=>"blame", file_name=>$file_name)},
4817                         "HEAD");
4818         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
4819         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
4820         git_print_page_path($file_name, $ftype, $hash_base);
4821
4822         # page body
4823         my @rev_color = qw(light dark);
4824         my $num_colors = scalar(@rev_color);
4825         my $current_color = 0;
4826         my %metainfo = ();
4827
4828         print <<HTML;
4829 <div class="page_body">
4830 <table class="blame">
4831 <tr><th>Commit</th><th>Line</th><th>Data</th></tr>
4832 HTML
4833  LINE:
4834         while (my $line = <$fd>) {
4835                 chomp $line;
4836                 # the header: <SHA-1> <src lineno> <dst lineno> [<lines in group>]
4837                 # no <lines in group> for subsequent lines in group of lines
4838                 my ($full_rev, $orig_lineno, $lineno, $group_size) =
4839                    ($line =~ /^([0-9a-f]{40}) (\d+) (\d+)(?: (\d+))?$/);
4840                 if (!exists $metainfo{$full_rev}) {
4841                         $metainfo{$full_rev} = { 'nprevious' => 0 };
4842                 }
4843                 my $meta = $metainfo{$full_rev};
4844                 my $data;
4845                 while ($data = <$fd>) {
4846                         chomp $data;
4847                         last if ($data =~ s/^\t//); # contents of line
4848                         if ($data =~ /^(\S+)(?: (.*))?$/) {
4849                                 $meta->{$1} = $2 unless exists $meta->{$1};
4850                         }
4851                         if ($data =~ /^previous /) {
4852                                 $meta->{'nprevious'}++;
4853                         }
4854                 }
4855                 my $short_rev = substr($full_rev, 0, 8);
4856                 my $author = $meta->{'author'};
4857                 my %date =
4858                         parse_date($meta->{'author-time'}, $meta->{'author-tz'});
4859                 my $date = $date{'iso-tz'};
4860                 if ($group_size) {
4861                         $current_color = ($current_color + 1) % $num_colors;
4862                 }
4863                 my $tr_class = $rev_color[$current_color];
4864                 $tr_class .= ' boundary' if (exists $meta->{'boundary'});
4865                 $tr_class .= ' no-previous' if ($meta->{'nprevious'} == 0);
4866                 $tr_class .= ' multiple-previous' if ($meta->{'nprevious'} > 1);
4867                 print "<tr id=\"l$lineno\" class=\"$tr_class\">\n";
4868                 if ($group_size) {
4869                         print "<td class=\"sha1\"";
4870                         print " title=\"". esc_html($author) . ", $date\"";
4871                         print " rowspan=\"$group_size\"" if ($group_size > 1);
4872                         print ">";
4873                         print $cgi->a({-href => href(action=>"commit",
4874                                                      hash=>$full_rev,
4875                                                      file_name=>$file_name)},
4876                                       esc_html($short_rev));
4877                         if ($group_size >= 2) {
4878                                 my @author_initials = ($author =~ /\b([[:upper:]])\B/g);
4879                                 if (@author_initials) {
4880                                         print "<br />" .
4881                                               esc_html(join('', @author_initials));
4882                                         #           or join('.', ...)
4883                                 }
4884                         }
4885                         print "</td>\n";
4886                 }
4887                 # 'previous' <sha1 of parent commit> <filename at commit>
4888                 if (exists $meta->{'previous'} &&
4889                     $meta->{'previous'} =~ /^([a-fA-F0-9]{40}) (.*)$/) {
4890                         $meta->{'parent'} = $1;
4891                         $meta->{'file_parent'} = unquote($2);
4892                 }
4893                 my $linenr_commit =
4894                         exists($meta->{'parent'}) ?
4895                         $meta->{'parent'} : $full_rev;
4896                 my $linenr_filename =
4897                         exists($meta->{'file_parent'}) ?
4898                         $meta->{'file_parent'} : unquote($meta->{'filename'});
4899                 my $blamed = href(action => 'blame',
4900                                   file_name => $linenr_filename,
4901                                   hash_base => $linenr_commit);
4902                 print "<td class=\"linenr\">";
4903                 print $cgi->a({ -href => "$blamed#l$orig_lineno",
4904                                 -class => "linenr" },
4905                               esc_html($lineno));
4906                 print "</td>";
4907                 print "<td class=\"pre\">" . esc_html($data) . "</td>\n";
4908                 print "</tr>\n";
4909         }
4910         print "</table>\n";
4911         print "</div>";
4912         close $fd
4913                 or print "Reading blob failed\n";
4914
4915         # page footer
4916         git_footer_html();
4917 }
4918
4919 sub git_tags {
4920         my $head = git_get_head_hash($project);
4921         git_header_html();
4922         git_print_page_nav('','', $head,undef,$head);
4923         git_print_header_div('summary', $project);
4924
4925         my @tagslist = git_get_tags_list();
4926         if (@tagslist) {
4927                 git_tags_body(\@tagslist);
4928         }
4929         git_footer_html();
4930 }
4931
4932 sub git_heads {
4933         my $head = git_get_head_hash($project);
4934         git_header_html();
4935         git_print_page_nav('','', $head,undef,$head);
4936         git_print_header_div('summary', $project);
4937
4938         my @headslist = git_get_heads_list();
4939         if (@headslist) {
4940                 git_heads_body(\@headslist, $head);
4941         }
4942         git_footer_html();
4943 }
4944
4945 sub git_blob_plain {
4946         my $type = shift;
4947         my $expires;
4948
4949         if (!defined $hash) {
4950                 if (defined $file_name) {
4951                         my $base = $hash_base || git_get_head_hash($project);
4952                         $hash = git_get_hash_by_path($base, $file_name, "blob")
4953                                 or die_error(404, "Cannot find file");
4954                 } else {
4955                         die_error(400, "No file name defined");
4956                 }
4957         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
4958                 # blobs defined by non-textual hash id's can be cached
4959                 $expires = "+1d";
4960         }
4961
4962         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
4963                 or die_error(500, "Open git-cat-file blob '$hash' failed");
4964
4965         # content-type (can include charset)
4966         $type = blob_contenttype($fd, $file_name, $type);
4967
4968         # "save as" filename, even when no $file_name is given
4969         my $save_as = "$hash";
4970         if (defined $file_name) {
4971                 $save_as = $file_name;
4972         } elsif ($type =~ m/^text\//) {
4973                 $save_as .= '.txt';
4974         }
4975
4976         # With XSS prevention on, blobs of all types except a few known safe
4977         # ones are served with "Content-Disposition: attachment" to make sure
4978         # they don't run in our security domain.  For certain image types,
4979         # blob view writes an <img> tag referring to blob_plain view, and we
4980         # want to be sure not to break that by serving the image as an
4981         # attachment (though Firefox 3 doesn't seem to care).
4982         my $sandbox = $prevent_xss &&
4983                 $type !~ m!^(?:text/plain|image/(?:gif|png|jpeg))$!;
4984
4985         print $cgi->header(
4986                 -type => $type,
4987                 -expires => $expires,
4988                 -content_disposition =>
4989                         ($sandbox ? 'attachment' : 'inline')
4990                         . '; filename="' . $save_as . '"');
4991         local $/ = undef;
4992         binmode STDOUT, ':raw';
4993         print <$fd>;
4994         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
4995         close $fd;
4996 }
4997
4998 sub git_blob {
4999         my $expires;
5000
5001         if (!defined $hash) {
5002                 if (defined $file_name) {
5003                         my $base = $hash_base || git_get_head_hash($project);
5004                         $hash = git_get_hash_by_path($base, $file_name, "blob")
5005                                 or die_error(404, "Cannot find file");
5006                 } else {
5007                         die_error(400, "No file name defined");
5008                 }
5009         } elsif ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5010                 # blobs defined by non-textual hash id's can be cached
5011                 $expires = "+1d";
5012         }
5013
5014         my $have_blame = gitweb_check_feature('blame');
5015         open my $fd, "-|", git_cmd(), "cat-file", "blob", $hash
5016                 or die_error(500, "Couldn't cat $file_name, $hash");
5017         my $mimetype = blob_mimetype($fd, $file_name);
5018         if ($mimetype !~ m!^(?:text/|image/(?:gif|png|jpeg)$)! && -B $fd) {
5019                 close $fd;
5020                 return git_blob_plain($mimetype);
5021         }
5022         # we can have blame only for text/* mimetype
5023         $have_blame &&= ($mimetype =~ m!^text/!);
5024
5025         git_header_html(undef, $expires);
5026         my $formats_nav = '';
5027         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5028                 if (defined $file_name) {
5029                         if ($have_blame) {
5030                                 $formats_nav .=
5031                                         $cgi->a({-href => href(action=>"blame", -replay=>1)},
5032                                                 "blame") .
5033                                         " | ";
5034                         }
5035                         $formats_nav .=
5036                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5037                                         "history") .
5038                                 " | " .
5039                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5040                                         "raw") .
5041                                 " | " .
5042                                 $cgi->a({-href => href(action=>"blob",
5043                                                        hash_base=>"HEAD", file_name=>$file_name)},
5044                                         "HEAD");
5045                 } else {
5046                         $formats_nav .=
5047                                 $cgi->a({-href => href(action=>"blob_plain", -replay=>1)},
5048                                         "raw");
5049                 }
5050                 git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5051                 git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5052         } else {
5053                 print "<div class=\"page_nav\">\n" .
5054                       "<br/><br/></div>\n" .
5055                       "<div class=\"title\">".esc_html($hash)."</div>\n";
5056         }
5057         git_print_page_path($file_name, "blob", $hash_base);
5058         print "<div class=\"page_body\">\n";
5059         if ($mimetype =~ m!^image/!) {
5060                 print qq!<img type="!.esc_attr($mimetype).qq!"!;
5061                 if ($file_name) {
5062                         print qq! alt="!.esc_attr($file_name).qq!" title="!.esc_attr($file_name).qq!"!;
5063                 }
5064                 print qq! src="! .
5065                       href(action=>"blob_plain", hash=>$hash,
5066                            hash_base=>$hash_base, file_name=>$file_name) .
5067                       qq!" />\n!;
5068         } else {
5069                 my $nr;
5070                 while (my $line = <$fd>) {
5071                         chomp $line;
5072                         $nr++;
5073                         $line = untabify($line);
5074                         printf "<div class=\"pre\"><a id=\"l%i\" href=\""
5075                                 . esc_attr(href(-replay => 1))
5076                                 . "#l%i\" class=\"linenr\">%4i</a> %s</div>\n",
5077                                $nr, $nr, $nr, esc_html($line, -nbsp=>1);
5078                 }
5079         }
5080         close $fd
5081                 or print "Reading blob failed.\n";
5082         print "</div>";
5083         git_footer_html();
5084 }
5085
5086 sub git_tree {
5087         if (!defined $hash_base) {
5088                 $hash_base = "HEAD";
5089         }
5090         if (!defined $hash) {
5091                 if (defined $file_name) {
5092                         $hash = git_get_hash_by_path($hash_base, $file_name, "tree");
5093                 } else {
5094                         $hash = $hash_base;
5095                 }
5096         }
5097         die_error(404, "No such tree") unless defined($hash);
5098
5099         my @entries = ();
5100         {
5101                 local $/ = "\0";
5102                 open my $fd, "-|", git_cmd(), "ls-tree", '-z', $hash
5103                         or die_error(500, "Open git-ls-tree failed");
5104                 @entries = map { chomp; $_ } <$fd>;
5105                 close $fd
5106                         or die_error(404, "Reading tree failed");
5107         }
5108
5109         my $refs = git_get_references();
5110         my $ref = format_ref_marker($refs, $hash_base);
5111         git_header_html();
5112         my $basedir = '';
5113         my $have_blame = gitweb_check_feature('blame');
5114         if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5115                 my @views_nav = ();
5116                 if (defined $file_name) {
5117                         push @views_nav,
5118                                 $cgi->a({-href => href(action=>"history", -replay=>1)},
5119                                         "history"),
5120                                 $cgi->a({-href => href(action=>"tree",
5121                                                        hash_base=>"HEAD", file_name=>$file_name)},
5122                                         "HEAD"),
5123                 }
5124                 my $snapshot_links = format_snapshot_links($hash);
5125                 if (defined $snapshot_links) {
5126                         # FIXME: Should be available when we have no hash base as well.
5127                         push @views_nav, $snapshot_links;
5128                 }
5129                 git_print_page_nav('tree','', $hash_base, undef, undef, join(' | ', @views_nav));
5130                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash_base);
5131         } else {
5132                 undef $hash_base;
5133                 print "<div class=\"page_nav\">\n";
5134                 print "<br/><br/></div>\n";
5135                 print "<div class=\"title\">".esc_html($hash)."</div>\n";
5136         }
5137         if (defined $file_name) {
5138                 $basedir = $file_name;
5139                 if ($basedir ne '' && substr($basedir, -1) ne '/') {
5140                         $basedir .= '/';
5141                 }
5142                 git_print_page_path($file_name, 'tree', $hash_base);
5143         }
5144         print "<div class=\"page_body\">\n";
5145         print "<table class=\"tree\">\n";
5146         my $alternate = 1;
5147         # '..' (top directory) link if possible
5148         if (defined $hash_base &&
5149             defined $file_name && $file_name =~ m![^/]+$!) {
5150                 if ($alternate) {
5151                         print "<tr class=\"dark\">\n";
5152                 } else {
5153                         print "<tr class=\"light\">\n";
5154                 }
5155                 $alternate ^= 1;
5156
5157                 my $up = $file_name;
5158                 $up =~ s!/?[^/]+$!!;
5159                 undef $up unless $up;
5160                 # based on git_print_tree_entry
5161                 print '<td class="mode">' . mode_str('040000') . "</td>\n";
5162                 print '<td class="list">';
5163                 print $cgi->a({-href => href(action=>"tree", hash_base=>$hash_base,
5164                                              file_name=>$up)},
5165                               "..");
5166                 print "</td>\n";
5167                 print "<td class=\"link\"></td>\n";
5168
5169                 print "</tr>\n";
5170         }
5171         foreach my $line (@entries) {
5172                 my %t = parse_ls_tree_line($line, -z => 1);
5173
5174                 if ($alternate) {
5175                         print "<tr class=\"dark\">\n";
5176                 } else {
5177                         print "<tr class=\"light\">\n";
5178                 }
5179                 $alternate ^= 1;
5180
5181                 git_print_tree_entry(\%t, $basedir, $hash_base, $have_blame);
5182
5183                 print "</tr>\n";
5184         }
5185         print "</table>\n" .
5186               "</div>";
5187         git_footer_html();
5188 }
5189
5190 sub git_snapshot {
5191         my $format = $input_params{'snapshot_format'};
5192         if (!@snapshot_fmts) {
5193                 die_error(403, "Snapshots not allowed");
5194         }
5195         # default to first supported snapshot format
5196         $format ||= $snapshot_fmts[0];
5197         if ($format !~ m/^[a-z0-9]+$/) {
5198                 die_error(400, "Invalid snapshot format parameter");
5199         } elsif (!exists($known_snapshot_formats{$format})) {
5200                 die_error(400, "Unknown snapshot format");
5201         } elsif ($known_snapshot_formats{$format}{'disabled'}) {
5202                 die_error(403, "Snapshot format not allowed");
5203         } elsif (!grep($_ eq $format, @snapshot_fmts)) {
5204                 die_error(403, "Unsupported snapshot format");
5205         }
5206
5207         if (!defined $hash) {
5208                 $hash = git_get_head_hash($project);
5209         }
5210
5211         my $name = $project;
5212         $name =~ s,([^/])/*\.git$,$1,;
5213         $name = basename($name);
5214         my $filename = to_utf8($name);
5215         $name =~ s/\047/\047\\\047\047/g;
5216         my $cmd;
5217         $filename .= "-$hash$known_snapshot_formats{$format}{'suffix'}";
5218         $cmd = quote_command(
5219                 git_cmd(), 'archive',
5220                 "--format=$known_snapshot_formats{$format}{'format'}",
5221                 "--prefix=$name/", $hash);
5222         if (exists $known_snapshot_formats{$format}{'compressor'}) {
5223                 $cmd .= ' | ' . quote_command(@{$known_snapshot_formats{$format}{'compressor'}});
5224         }
5225
5226         print $cgi->header(
5227                 -type => $known_snapshot_formats{$format}{'type'},
5228                 -content_disposition => 'inline; filename="' . "$filename" . '"',
5229                 -status => '200 OK');
5230
5231         open my $fd, "-|", $cmd
5232                 or die_error(500, "Execute git-archive failed");
5233         binmode STDOUT, ':raw';
5234         print <$fd>;
5235         binmode STDOUT, ':utf8'; # as set at the beginning of gitweb.cgi
5236         close $fd;
5237 }
5238
5239 sub git_log {
5240         my $head = git_get_head_hash($project);
5241         if (!defined $hash) {
5242                 $hash = $head;
5243         }
5244         if (!defined $page) {
5245                 $page = 0;
5246         }
5247         my $refs = git_get_references();
5248
5249         my @commitlist = parse_commits($hash, 101, (100 * $page));
5250
5251         my $paging_nav = format_paging_nav('log', $hash, $head, $page, $#commitlist >= 100);
5252
5253         my ($patch_max) = gitweb_get_feature('patches');
5254         if ($patch_max) {
5255                 if ($patch_max < 0 || @commitlist <= $patch_max) {
5256                         $paging_nav .= " &sdot; " .
5257                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
5258                                         "patches");
5259                 }
5260         }
5261
5262         git_header_html();
5263         git_print_page_nav('log','', $hash,undef,undef, $paging_nav);
5264
5265         if (!@commitlist) {
5266                 my %co = parse_commit($hash);
5267
5268                 git_print_header_div('summary', $project);
5269                 print "<div class=\"page_body\"> Last change $co{'age_string'}.<br/><br/></div>\n";
5270         }
5271         my $to = ($#commitlist >= 99) ? (99) : ($#commitlist);
5272         for (my $i = 0; $i <= $to; $i++) {
5273                 my %co = %{$commitlist[$i]};
5274                 next if !%co;
5275                 my $commit = $co{'id'};
5276                 my $ref = format_ref_marker($refs, $commit);
5277                 my %ad = parse_date($co{'author_epoch'});
5278                 git_print_header_div('commit',
5279                                "<span class=\"age\">$co{'age_string'}</span>" .
5280                                esc_html($co{'title'}) . $ref,
5281                                $commit);
5282                 print "<div class=\"title_text\">\n" .
5283                       "<div class=\"log_link\">\n" .
5284                       $cgi->a({-href => href(action=>"commit", hash=>$commit)}, "commit") .
5285                       " | " .
5286                       $cgi->a({-href => href(action=>"commitdiff", hash=>$commit)}, "commitdiff") .
5287                       " | " .
5288                       $cgi->a({-href => href(action=>"tree", hash=>$commit, hash_base=>$commit)}, "tree") .
5289                       "<br/>\n" .
5290                       "</div>\n";
5291                       git_print_authorship(\%co, -tag => 'span');
5292                       print "<br/>\n</div>\n";
5293
5294                 print "<div class=\"log_body\">\n";
5295                 git_print_log($co{'comment'}, -final_empty_line=> 1);
5296                 print "</div>\n";
5297         }
5298         if ($#commitlist >= 100) {
5299                 print "<div class=\"page_nav\">\n";
5300                 print $cgi->a({-href => href(-replay=>1, page=>$page+1),
5301                                -accesskey => "n", -title => "Alt-n"}, "next");
5302                 print "</div>\n";
5303         }
5304         git_footer_html();
5305 }
5306
5307 sub git_commit {
5308         $hash ||= $hash_base || "HEAD";
5309         my %co = parse_commit($hash)
5310             or die_error(404, "Unknown commit object");
5311
5312         my $parent  = $co{'parent'};
5313         my $parents = $co{'parents'}; # listref
5314
5315         # we need to prepare $formats_nav before any parameter munging
5316         my $formats_nav;
5317         if (!defined $parent) {
5318                 # --root commitdiff
5319                 $formats_nav .= '(initial)';
5320         } elsif (@$parents == 1) {
5321                 # single parent commit
5322                 $formats_nav .=
5323                         '(parent: ' .
5324                         $cgi->a({-href => href(action=>"commit",
5325                                                hash=>$parent)},
5326                                 esc_html(substr($parent, 0, 7))) .
5327                         ')';
5328         } else {
5329                 # merge commit
5330                 $formats_nav .=
5331                         '(merge: ' .
5332                         join(' ', map {
5333                                 $cgi->a({-href => href(action=>"commit",
5334                                                        hash=>$_)},
5335                                         esc_html(substr($_, 0, 7)));
5336                         } @$parents ) .
5337                         ')';
5338         }
5339         if (gitweb_check_feature('patches') && @$parents <= 1) {
5340                 $formats_nav .= " | " .
5341                         $cgi->a({-href => href(action=>"patch", -replay=>1)},
5342                                 "patch");
5343         }
5344
5345         if (!defined $parent) {
5346                 $parent = "--root";
5347         }
5348         my @difftree;
5349         open my $fd, "-|", git_cmd(), "diff-tree", '-r', "--no-commit-id",
5350                 @diff_opts,
5351                 (@$parents <= 1 ? $parent : '-c'),
5352                 $hash, "--"
5353                 or die_error(500, "Open git-diff-tree failed");
5354         @difftree = map { chomp; $_ } <$fd>;
5355         close $fd or die_error(404, "Reading git-diff-tree failed");
5356
5357         # non-textual hash id's can be cached
5358         my $expires;
5359         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5360                 $expires = "+1d";
5361         }
5362         my $refs = git_get_references();
5363         my $ref = format_ref_marker($refs, $co{'id'});
5364
5365         git_header_html(undef, $expires);
5366         git_print_page_nav('commit', '',
5367                            $hash, $co{'tree'}, $hash,
5368                            $formats_nav);
5369
5370         if (defined $co{'parent'}) {
5371                 git_print_header_div('commitdiff', esc_html($co{'title'}) . $ref, $hash);
5372         } else {
5373                 git_print_header_div('tree', esc_html($co{'title'}) . $ref, $co{'tree'}, $hash);
5374         }
5375         print "<div class=\"title_text\">\n" .
5376               "<table class=\"object_header\">\n";
5377         git_print_authorship_rows(\%co);
5378         print "<tr><td>commit</td><td class=\"sha1\">$co{'id'}</td></tr>\n";
5379         print "<tr>" .
5380               "<td>tree</td>" .
5381               "<td class=\"sha1\">" .
5382               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash),
5383                        class => "list"}, $co{'tree'}) .
5384               "</td>" .
5385               "<td class=\"link\">" .
5386               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$hash)},
5387                       "tree");
5388         my $snapshot_links = format_snapshot_links($hash);
5389         if (defined $snapshot_links) {
5390                 print " | " . $snapshot_links;
5391         }
5392         print "</td>" .
5393               "</tr>\n";
5394
5395         foreach my $par (@$parents) {
5396                 print "<tr>" .
5397                       "<td>parent</td>" .
5398                       "<td class=\"sha1\">" .
5399                       $cgi->a({-href => href(action=>"commit", hash=>$par),
5400                                class => "list"}, $par) .
5401                       "</td>" .
5402                       "<td class=\"link\">" .
5403                       $cgi->a({-href => href(action=>"commit", hash=>$par)}, "commit") .
5404                       " | " .
5405                       $cgi->a({-href => href(action=>"commitdiff", hash=>$hash, hash_parent=>$par)}, "diff") .
5406                       "</td>" .
5407                       "</tr>\n";
5408         }
5409         print "</table>".
5410               "</div>\n";
5411
5412         print "<div class=\"page_body\">\n";
5413         git_print_log($co{'comment'});
5414         print "</div>\n";
5415
5416         git_difftree_body(\@difftree, $hash, @$parents);
5417
5418         git_footer_html();
5419 }
5420
5421 sub git_object {
5422         # object is defined by:
5423         # - hash or hash_base alone
5424         # - hash_base and file_name
5425         my $type;
5426
5427         # - hash or hash_base alone
5428         if ($hash || ($hash_base && !defined $file_name)) {
5429                 my $object_id = $hash || $hash_base;
5430
5431                 open my $fd, "-|", quote_command(
5432                         git_cmd(), 'cat-file', '-t', $object_id) . ' 2> /dev/null'
5433                         or die_error(404, "Object does not exist");
5434                 $type = <$fd>;
5435                 chomp $type;
5436                 close $fd
5437                         or die_error(404, "Object does not exist");
5438
5439         # - hash_base and file_name
5440         } elsif ($hash_base && defined $file_name) {
5441                 $file_name =~ s,/+$,,;
5442
5443                 system(git_cmd(), "cat-file", '-e', $hash_base) == 0
5444                         or die_error(404, "Base object does not exist");
5445
5446                 # here errors should not hapen
5447                 open my $fd, "-|", git_cmd(), "ls-tree", $hash_base, "--", $file_name
5448                         or die_error(500, "Open git-ls-tree failed");
5449                 my $line = <$fd>;
5450                 close $fd;
5451
5452                 #'100644 blob 0fa3f3a66fb6a137f6ec2c19351ed4d807070ffa  panic.c'
5453                 unless ($line && $line =~ m/^([0-9]+) (.+) ([0-9a-fA-F]{40})\t/) {
5454                         die_error(404, "File or directory for given base does not exist");
5455                 }
5456                 $type = $2;
5457                 $hash = $3;
5458         } else {
5459                 die_error(400, "Not enough information to find object");
5460         }
5461
5462         print $cgi->redirect(-uri => href(action=>$type, -full=>1,
5463                                           hash=>$hash, hash_base=>$hash_base,
5464                                           file_name=>$file_name),
5465                              -status => '302 Found');
5466 }
5467
5468 sub git_blobdiff {
5469         my $format = shift || 'html';
5470
5471         my $fd;
5472         my @difftree;
5473         my %diffinfo;
5474         my $expires;
5475
5476         # preparing $fd and %diffinfo for git_patchset_body
5477         # new style URI
5478         if (defined $hash_base && defined $hash_parent_base) {
5479                 if (defined $file_name) {
5480                         # read raw output
5481                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5482                                 $hash_parent_base, $hash_base,
5483                                 "--", (defined $file_parent ? $file_parent : ()), $file_name
5484                                 or die_error(500, "Open git-diff-tree failed");
5485                         @difftree = map { chomp; $_ } <$fd>;
5486                         close $fd
5487                                 or die_error(404, "Reading git-diff-tree failed");
5488                         @difftree
5489                                 or die_error(404, "Blob diff not found");
5490
5491                 } elsif (defined $hash &&
5492                          $hash =~ /[0-9a-fA-F]{40}/) {
5493                         # try to find filename from $hash
5494
5495                         # read filtered raw output
5496                         open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5497                                 $hash_parent_base, $hash_base, "--"
5498                                 or die_error(500, "Open git-diff-tree failed");
5499                         @difftree =
5500                                 # ':100644 100644 03b21826... 3b93d5e7... M     ls-files.c'
5501                                 # $hash == to_id
5502                                 grep { /^:[0-7]{6} [0-7]{6} [0-9a-fA-F]{40} $hash/ }
5503                                 map { chomp; $_ } <$fd>;
5504                         close $fd
5505                                 or die_error(404, "Reading git-diff-tree failed");
5506                         @difftree
5507                                 or die_error(404, "Blob diff not found");
5508
5509                 } else {
5510                         die_error(400, "Missing one of the blob diff parameters");
5511                 }
5512
5513                 if (@difftree > 1) {
5514                         die_error(400, "Ambiguous blob diff specification");
5515                 }
5516
5517                 %diffinfo = parse_difftree_raw_line($difftree[0]);
5518                 $file_parent ||= $diffinfo{'from_file'} || $file_name;
5519                 $file_name   ||= $diffinfo{'to_file'};
5520
5521                 $hash_parent ||= $diffinfo{'from_id'};
5522                 $hash        ||= $diffinfo{'to_id'};
5523
5524                 # non-textual hash id's can be cached
5525                 if ($hash_base =~ m/^[0-9a-fA-F]{40}$/ &&
5526                     $hash_parent_base =~ m/^[0-9a-fA-F]{40}$/) {
5527                         $expires = '+1d';
5528                 }
5529
5530                 # open patch output
5531                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5532                         '-p', ($format eq 'html' ? "--full-index" : ()),
5533                         $hash_parent_base, $hash_base,
5534                         "--", (defined $file_parent ? $file_parent : ()), $file_name
5535                         or die_error(500, "Open git-diff-tree failed");
5536         }
5537
5538         # old/legacy style URI -- not generated anymore since 1.4.3.
5539         if (!%diffinfo) {
5540                 die_error('404 Not Found', "Missing one of the blob diff parameters")
5541         }
5542
5543         # header
5544         if ($format eq 'html') {
5545                 my $formats_nav =
5546                         $cgi->a({-href => href(action=>"blobdiff_plain", -replay=>1)},
5547                                 "raw");
5548                 git_header_html(undef, $expires);
5549                 if (defined $hash_base && (my %co = parse_commit($hash_base))) {
5550                         git_print_page_nav('','', $hash_base,$co{'tree'},$hash_base, $formats_nav);
5551                         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5552                 } else {
5553                         print "<div class=\"page_nav\"><br/>$formats_nav<br/></div>\n";
5554                         print "<div class=\"title\">".esc_html("$hash vs $hash_parent")."</div>\n";
5555                 }
5556                 if (defined $file_name) {
5557                         git_print_page_path($file_name, "blob", $hash_base);
5558                 } else {
5559                         print "<div class=\"page_path\"></div>\n";
5560                 }
5561
5562         } elsif ($format eq 'plain') {
5563                 print $cgi->header(
5564                         -type => 'text/plain',
5565                         -charset => 'utf-8',
5566                         -expires => $expires,
5567                         -content_disposition => 'inline; filename="' . "$file_name" . '.patch"');
5568
5569                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5570
5571         } else {
5572                 die_error(400, "Unknown blobdiff format");
5573         }
5574
5575         # patch
5576         if ($format eq 'html') {
5577                 print "<div class=\"page_body\">\n";
5578
5579                 git_patchset_body($fd, [ \%diffinfo ], $hash_base, $hash_parent_base);
5580                 close $fd;
5581
5582                 print "</div>\n"; # class="page_body"
5583                 git_footer_html();
5584
5585         } else {
5586                 while (my $line = <$fd>) {
5587                         $line =~ s!a/($hash|$hash_parent)!'a/'.esc_path($diffinfo{'from_file'})!eg;
5588                         $line =~ s!b/($hash|$hash_parent)!'b/'.esc_path($diffinfo{'to_file'})!eg;
5589
5590                         print $line;
5591
5592                         last if $line =~ m!^\+\+\+!;
5593                 }
5594                 local $/ = undef;
5595                 print <$fd>;
5596                 close $fd;
5597         }
5598 }
5599
5600 sub git_blobdiff_plain {
5601         git_blobdiff('plain');
5602 }
5603
5604 sub git_commitdiff {
5605         my %params = @_;
5606         my $format = $params{-format} || 'html';
5607
5608         my ($patch_max) = gitweb_get_feature('patches');
5609         if ($format eq 'patch') {
5610                 die_error(403, "Patch view not allowed") unless $patch_max;
5611         }
5612
5613         $hash ||= $hash_base || "HEAD";
5614         my %co = parse_commit($hash)
5615             or die_error(404, "Unknown commit object");
5616
5617         # choose format for commitdiff for merge
5618         if (! defined $hash_parent && @{$co{'parents'}} > 1) {
5619                 $hash_parent = '--cc';
5620         }
5621         # we need to prepare $formats_nav before almost any parameter munging
5622         my $formats_nav;
5623         if ($format eq 'html') {
5624                 $formats_nav =
5625                         $cgi->a({-href => href(action=>"commitdiff_plain", -replay=>1)},
5626                                 "raw");
5627                 if ($patch_max && @{$co{'parents'}} <= 1) {
5628                         $formats_nav .= " | " .
5629                                 $cgi->a({-href => href(action=>"patch", -replay=>1)},
5630                                         "patch");
5631                 }
5632
5633                 if (defined $hash_parent &&
5634                     $hash_parent ne '-c' && $hash_parent ne '--cc') {
5635                         # commitdiff with two commits given
5636                         my $hash_parent_short = $hash_parent;
5637                         if ($hash_parent =~ m/^[0-9a-fA-F]{40}$/) {
5638                                 $hash_parent_short = substr($hash_parent, 0, 7);
5639                         }
5640                         $formats_nav .=
5641                                 ' (from';
5642                         for (my $i = 0; $i < @{$co{'parents'}}; $i++) {
5643                                 if ($co{'parents'}[$i] eq $hash_parent) {
5644                                         $formats_nav .= ' parent ' . ($i+1);
5645                                         last;
5646                                 }
5647                         }
5648                         $formats_nav .= ': ' .
5649                                 $cgi->a({-href => href(action=>"commitdiff",
5650                                                        hash=>$hash_parent)},
5651                                         esc_html($hash_parent_short)) .
5652                                 ')';
5653                 } elsif (!$co{'parent'}) {
5654                         # --root commitdiff
5655                         $formats_nav .= ' (initial)';
5656                 } elsif (scalar @{$co{'parents'}} == 1) {
5657                         # single parent commit
5658                         $formats_nav .=
5659                                 ' (parent: ' .
5660                                 $cgi->a({-href => href(action=>"commitdiff",
5661                                                        hash=>$co{'parent'})},
5662                                         esc_html(substr($co{'parent'}, 0, 7))) .
5663                                 ')';
5664                 } else {
5665                         # merge commit
5666                         if ($hash_parent eq '--cc') {
5667                                 $formats_nav .= ' | ' .
5668                                         $cgi->a({-href => href(action=>"commitdiff",
5669                                                                hash=>$hash, hash_parent=>'-c')},
5670                                                 'combined');
5671                         } else { # $hash_parent eq '-c'
5672                                 $formats_nav .= ' | ' .
5673                                         $cgi->a({-href => href(action=>"commitdiff",
5674                                                                hash=>$hash, hash_parent=>'--cc')},
5675                                                 'compact');
5676                         }
5677                         $formats_nav .=
5678                                 ' (merge: ' .
5679                                 join(' ', map {
5680                                         $cgi->a({-href => href(action=>"commitdiff",
5681                                                                hash=>$_)},
5682                                                 esc_html(substr($_, 0, 7)));
5683                                 } @{$co{'parents'}} ) .
5684                                 ')';
5685                 }
5686         }
5687
5688         my $hash_parent_param = $hash_parent;
5689         if (!defined $hash_parent_param) {
5690                 # --cc for multiple parents, --root for parentless
5691                 $hash_parent_param =
5692                         @{$co{'parents'}} > 1 ? '--cc' : $co{'parent'} || '--root';
5693         }
5694
5695         # read commitdiff
5696         my $fd;
5697         my @difftree;
5698         if ($format eq 'html') {
5699                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5700                         "--no-commit-id", "--patch-with-raw", "--full-index",
5701                         $hash_parent_param, $hash, "--"
5702                         or die_error(500, "Open git-diff-tree failed");
5703
5704                 while (my $line = <$fd>) {
5705                         chomp $line;
5706                         # empty line ends raw part of diff-tree output
5707                         last unless $line;
5708                         push @difftree, scalar parse_difftree_raw_line($line);
5709                 }
5710
5711         } elsif ($format eq 'plain') {
5712                 open $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
5713                         '-p', $hash_parent_param, $hash, "--"
5714                         or die_error(500, "Open git-diff-tree failed");
5715         } elsif ($format eq 'patch') {
5716                 # For commit ranges, we limit the output to the number of
5717                 # patches specified in the 'patches' feature.
5718                 # For single commits, we limit the output to a single patch,
5719                 # diverging from the git-format-patch default.
5720                 my @commit_spec = ();
5721                 if ($hash_parent) {
5722                         if ($patch_max > 0) {
5723                                 push @commit_spec, "-$patch_max";
5724                         }
5725                         push @commit_spec, '-n', "$hash_parent..$hash";
5726                 } else {
5727                         if ($params{-single}) {
5728                                 push @commit_spec, '-1';
5729                         } else {
5730                                 if ($patch_max > 0) {
5731                                         push @commit_spec, "-$patch_max";
5732                                 }
5733                                 push @commit_spec, "-n";
5734                         }
5735                         push @commit_spec, '--root', $hash;
5736                 }
5737                 open $fd, "-|", git_cmd(), "format-patch", '--encoding=utf8',
5738                         '--stdout', @commit_spec
5739                         or die_error(500, "Open git-format-patch failed");
5740         } else {
5741                 die_error(400, "Unknown commitdiff format");
5742         }
5743
5744         # non-textual hash id's can be cached
5745         my $expires;
5746         if ($hash =~ m/^[0-9a-fA-F]{40}$/) {
5747                 $expires = "+1d";
5748         }
5749
5750         # write commit message
5751         if ($format eq 'html') {
5752                 my $refs = git_get_references();
5753                 my $ref = format_ref_marker($refs, $co{'id'});
5754
5755                 git_header_html(undef, $expires);
5756                 git_print_page_nav('commitdiff','', $hash,$co{'tree'},$hash, $formats_nav);
5757                 git_print_header_div('commit', esc_html($co{'title'}) . $ref, $hash);
5758                 print "<div class=\"title_text\">\n" .
5759                       "<table class=\"object_header\">\n";
5760                 git_print_authorship_rows(\%co);
5761                 print "</table>".
5762                       "</div>\n";
5763                 print "<div class=\"page_body\">\n";
5764                 if (@{$co{'comment'}} > 1) {
5765                         print "<div class=\"log\">\n";
5766                         git_print_log($co{'comment'}, -final_empty_line=> 1, -remove_title => 1);
5767                         print "</div>\n"; # class="log"
5768                 }
5769
5770         } elsif ($format eq 'plain') {
5771                 my $refs = git_get_references("tags");
5772                 my $tagname = git_get_rev_name_tags($hash);
5773                 my $filename = basename($project) . "-$hash.patch";
5774
5775                 print $cgi->header(
5776                         -type => 'text/plain',
5777                         -charset => 'utf-8',
5778                         -expires => $expires,
5779                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5780                 my %ad = parse_date($co{'author_epoch'}, $co{'author_tz'});
5781                 print "From: " . to_utf8($co{'author'}) . "\n";
5782                 print "Date: $ad{'rfc2822'} ($ad{'tz_local'})\n";
5783                 print "Subject: " . to_utf8($co{'title'}) . "\n";
5784
5785                 print "X-Git-Tag: $tagname\n" if $tagname;
5786                 print "X-Git-Url: " . $cgi->self_url() . "\n\n";
5787
5788                 foreach my $line (@{$co{'comment'}}) {
5789                         print to_utf8($line) . "\n";
5790                 }
5791                 print "---\n\n";
5792         } elsif ($format eq 'patch') {
5793                 my $filename = basename($project) . "-$hash.patch";
5794
5795                 print $cgi->header(
5796                         -type => 'text/plain',
5797                         -charset => 'utf-8',
5798                         -expires => $expires,
5799                         -content_disposition => 'inline; filename="' . "$filename" . '"');
5800         }
5801
5802         # write patch
5803         if ($format eq 'html') {
5804                 my $use_parents = !defined $hash_parent ||
5805                         $hash_parent eq '-c' || $hash_parent eq '--cc';
5806                 git_difftree_body(\@difftree, $hash,
5807                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5808                 print "<br/>\n";
5809
5810                 git_patchset_body($fd, \@difftree, $hash,
5811                                   $use_parents ? @{$co{'parents'}} : $hash_parent);
5812                 close $fd;
5813                 print "</div>\n"; # class="page_body"
5814                 git_footer_html();
5815
5816         } elsif ($format eq 'plain') {
5817                 local $/ = undef;
5818                 print <$fd>;
5819                 close $fd
5820                         or print "Reading git-diff-tree failed\n";
5821         } elsif ($format eq 'patch') {
5822                 local $/ = undef;
5823                 print <$fd>;
5824                 close $fd
5825                         or print "Reading git-format-patch failed\n";
5826         }
5827 }
5828
5829 sub git_commitdiff_plain {
5830         git_commitdiff(-format => 'plain');
5831 }
5832
5833 # format-patch-style patches
5834 sub git_patch {
5835         git_commitdiff(-format => 'patch', -single => 1);
5836 }
5837
5838 sub git_patches {
5839         git_commitdiff(-format => 'patch');
5840 }
5841
5842 sub git_history {
5843         if (!defined $hash_base) {
5844                 $hash_base = git_get_head_hash($project);
5845         }
5846         if (!defined $page) {
5847                 $page = 0;
5848         }
5849         my $ftype;
5850         my %co = parse_commit($hash_base)
5851             or die_error(404, "Unknown commit object");
5852
5853         my $refs = git_get_references();
5854         my $limit = sprintf("--max-count=%i", (100 * ($page+1)));
5855
5856         my @commitlist = parse_commits($hash_base, 101, (100 * $page),
5857                                        $file_name, "--full-history")
5858             or die_error(404, "No such file or directory on given branch");
5859
5860         if (!defined $hash && defined $file_name) {
5861                 # some commits could have deleted file in question,
5862                 # and not have it in tree, but one of them has to have it
5863                 for (my $i = 0; $i <= @commitlist; $i++) {
5864                         $hash = git_get_hash_by_path($commitlist[$i]{'id'}, $file_name);
5865                         last if defined $hash;
5866                 }
5867         }
5868         if (defined $hash) {
5869                 $ftype = git_get_type($hash);
5870         }
5871         if (!defined $ftype) {
5872                 die_error(500, "Unknown type of object");
5873         }
5874
5875         my $paging_nav = '';
5876         if ($page > 0) {
5877                 $paging_nav .=
5878                         $cgi->a({-href => href(action=>"history", hash=>$hash, hash_base=>$hash_base,
5879                                                file_name=>$file_name)},
5880                                 "first");
5881                 $paging_nav .= " &sdot; " .
5882                         $cgi->a({-href => href(-replay=>1, page=>$page-1),
5883                                  -accesskey => "p", -title => "Alt-p"}, "prev");
5884         } else {
5885                 $paging_nav .= "first";
5886                 $paging_nav .= " &sdot; prev";
5887         }
5888         my $next_link = '';
5889         if ($#commitlist >= 100) {
5890                 $next_link =
5891                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
5892                                  -accesskey => "n", -title => "Alt-n"}, "next");
5893                 $paging_nav .= " &sdot; $next_link";
5894         } else {
5895                 $paging_nav .= " &sdot; next";
5896         }
5897
5898         git_header_html();
5899         git_print_page_nav('history','', $hash_base,$co{'tree'},$hash_base, $paging_nav);
5900         git_print_header_div('commit', esc_html($co{'title'}), $hash_base);
5901         git_print_page_path($file_name, $ftype, $hash_base);
5902
5903         git_history_body(\@commitlist, 0, 99,
5904                          $refs, $hash_base, $ftype, $next_link);
5905
5906         git_footer_html();
5907 }
5908
5909 sub git_search {
5910         gitweb_check_feature('search') or die_error(403, "Search is disabled");
5911         if (!defined $searchtext) {
5912                 die_error(400, "Text field is empty");
5913         }
5914         if (!defined $hash) {
5915                 $hash = git_get_head_hash($project);
5916         }
5917         my %co = parse_commit($hash);
5918         if (!%co) {
5919                 die_error(404, "Unknown commit object");
5920         }
5921         if (!defined $page) {
5922                 $page = 0;
5923         }
5924
5925         $searchtype ||= 'commit';
5926         if ($searchtype eq 'pickaxe') {
5927                 # pickaxe may take all resources of your box and run for several minutes
5928                 # with every query - so decide by yourself how public you make this feature
5929                 gitweb_check_feature('pickaxe')
5930                     or die_error(403, "Pickaxe is disabled");
5931         }
5932         if ($searchtype eq 'grep') {
5933                 gitweb_check_feature('grep')
5934                     or die_error(403, "Grep is disabled");
5935         }
5936
5937         git_header_html();
5938
5939         if ($searchtype eq 'commit' or $searchtype eq 'author' or $searchtype eq 'committer') {
5940                 my $greptype;
5941                 if ($searchtype eq 'commit') {
5942                         $greptype = "--grep=";
5943                 } elsif ($searchtype eq 'author') {
5944                         $greptype = "--author=";
5945                 } elsif ($searchtype eq 'committer') {
5946                         $greptype = "--committer=";
5947                 }
5948                 $greptype .= $searchtext;
5949                 my @commitlist = parse_commits($hash, 101, (100 * $page), undef,
5950                                                $greptype, '--regexp-ignore-case',
5951                                                $search_use_regexp ? '--extended-regexp' : '--fixed-strings');
5952
5953                 my $paging_nav = '';
5954                 if ($page > 0) {
5955                         $paging_nav .=
5956                                 $cgi->a({-href => href(action=>"search", hash=>$hash,
5957                                                        searchtext=>$searchtext,
5958                                                        searchtype=>$searchtype)},
5959                                         "first");
5960                         $paging_nav .= " &sdot; " .
5961                                 $cgi->a({-href => href(-replay=>1, page=>$page-1),
5962                                          -accesskey => "p", -title => "Alt-p"}, "prev");
5963                 } else {
5964                         $paging_nav .= "first";
5965                         $paging_nav .= " &sdot; prev";
5966                 }
5967                 my $next_link = '';
5968                 if ($#commitlist >= 100) {
5969                         $next_link =
5970                                 $cgi->a({-href => href(-replay=>1, page=>$page+1),
5971                                          -accesskey => "n", -title => "Alt-n"}, "next");
5972                         $paging_nav .= " &sdot; $next_link";
5973                 } else {
5974                         $paging_nav .= " &sdot; next";
5975                 }
5976
5977                 if ($#commitlist >= 100) {
5978                 }
5979
5980                 git_print_page_nav('','', $hash,$co{'tree'},$hash, $paging_nav);
5981                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5982                 git_search_grep_body(\@commitlist, 0, 99, $next_link);
5983         }
5984
5985         if ($searchtype eq 'pickaxe') {
5986                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
5987                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
5988
5989                 print "<table class=\"pickaxe search\">\n";
5990                 my $alternate = 1;
5991                 local $/ = "\n";
5992                 open my $fd, '-|', git_cmd(), '--no-pager', 'log', @diff_opts,
5993                         '--pretty=format:%H', '--no-abbrev', '--raw', "-S$searchtext",
5994                         ($search_use_regexp ? '--pickaxe-regex' : ());
5995                 undef %co;
5996                 my @files;
5997                 while (my $line = <$fd>) {
5998                         chomp $line;
5999                         next unless $line;
6000
6001                         my %set = parse_difftree_raw_line($line);
6002                         if (defined $set{'commit'}) {
6003                                 # finish previous commit
6004                                 if (%co) {
6005                                         print "</td>\n" .
6006                                               "<td class=\"link\">" .
6007                                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6008                                               " | " .
6009                                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6010                                         print "</td>\n" .
6011                                               "</tr>\n";
6012                                 }
6013
6014                                 if ($alternate) {
6015                                         print "<tr class=\"dark\">\n";
6016                                 } else {
6017                                         print "<tr class=\"light\">\n";
6018                                 }
6019                                 $alternate ^= 1;
6020                                 %co = parse_commit($set{'commit'});
6021                                 my $author = chop_and_escape_str($co{'author_name'}, 15, 5);
6022                                 print "<td title=\"$co{'age_string_age'}\"><i>$co{'age_string_date'}</i></td>\n" .
6023                                       "<td><i>$author</i></td>\n" .
6024                                       "<td>" .
6025                                       $cgi->a({-href => href(action=>"commit", hash=>$co{'id'}),
6026                                               -class => "list subject"},
6027                                               chop_and_escape_str($co{'title'}, 50) . "<br/>");
6028                         } elsif (defined $set{'to_id'}) {
6029                                 next if ($set{'to_id'} =~ m/^0{40}$/);
6030
6031                                 print $cgi->a({-href => href(action=>"blob", hash_base=>$co{'id'},
6032                                                              hash=>$set{'to_id'}, file_name=>$set{'to_file'}),
6033                                               -class => "list"},
6034                                               "<span class=\"match\">" . esc_path($set{'file'}) . "</span>") .
6035                                       "<br/>\n";
6036                         }
6037                 }
6038                 close $fd;
6039
6040                 # finish last commit (warning: repetition!)
6041                 if (%co) {
6042                         print "</td>\n" .
6043                               "<td class=\"link\">" .
6044                               $cgi->a({-href => href(action=>"commit", hash=>$co{'id'})}, "commit") .
6045                               " | " .
6046                               $cgi->a({-href => href(action=>"tree", hash=>$co{'tree'}, hash_base=>$co{'id'})}, "tree");
6047                         print "</td>\n" .
6048                               "</tr>\n";
6049                 }
6050
6051                 print "</table>\n";
6052         }
6053
6054         if ($searchtype eq 'grep') {
6055                 git_print_page_nav('','', $hash,$co{'tree'},$hash);
6056                 git_print_header_div('commit', esc_html($co{'title'}), $hash);
6057
6058                 print "<table class=\"grep_search\">\n";
6059                 my $alternate = 1;
6060                 my $matches = 0;
6061                 local $/ = "\n";
6062                 open my $fd, "-|", git_cmd(), 'grep', '-n',
6063                         $search_use_regexp ? ('-E', '-i') : '-F',
6064                         $searchtext, $co{'tree'};
6065                 my $lastfile = '';
6066                 while (my $line = <$fd>) {
6067                         chomp $line;
6068                         my ($file, $lno, $ltext, $binary);
6069                         last if ($matches++ > 1000);
6070                         if ($line =~ /^Binary file (.+) matches$/) {
6071                                 $file = $1;
6072                                 $binary = 1;
6073                         } else {
6074                                 (undef, $file, $lno, $ltext) = split(/:/, $line, 4);
6075                         }
6076                         if ($file ne $lastfile) {
6077                                 $lastfile and print "</td></tr>\n";
6078                                 if ($alternate++) {
6079                                         print "<tr class=\"dark\">\n";
6080                                 } else {
6081                                         print "<tr class=\"light\">\n";
6082                                 }
6083                                 print "<td class=\"list\">".
6084                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6085                                                                file_name=>"$file"),
6086                                                 -class => "list"}, esc_path($file));
6087                                 print "</td><td>\n";
6088                                 $lastfile = $file;
6089                         }
6090                         if ($binary) {
6091                                 print "<div class=\"binary\">Binary file</div>\n";
6092                         } else {
6093                                 $ltext = untabify($ltext);
6094                                 if ($ltext =~ m/^(.*)($search_regexp)(.*)$/i) {
6095                                         $ltext = esc_html($1, -nbsp=>1);
6096                                         $ltext .= '<span class="match">';
6097                                         $ltext .= esc_html($2, -nbsp=>1);
6098                                         $ltext .= '</span>';
6099                                         $ltext .= esc_html($3, -nbsp=>1);
6100                                 } else {
6101                                         $ltext = esc_html($ltext, -nbsp=>1);
6102                                 }
6103                                 print "<div class=\"pre\">" .
6104                                         $cgi->a({-href => href(action=>"blob", hash=>$co{'hash'},
6105                                                                file_name=>"$file").'#l'.$lno,
6106                                                 -class => "linenr"}, sprintf('%4i', $lno))
6107                                         . ' ' .  $ltext . "</div>\n";
6108                         }
6109                 }
6110                 if ($lastfile) {
6111                         print "</td></tr>\n";
6112                         if ($matches > 1000) {
6113                                 print "<div class=\"diff nodifferences\">Too many matches, listing trimmed</div>\n";
6114                         }
6115                 } else {
6116                         print "<div class=\"diff nodifferences\">No matches found</div>\n";
6117                 }
6118                 close $fd;
6119
6120                 print "</table>\n";
6121         }
6122         git_footer_html();
6123 }
6124
6125 sub git_search_help {
6126         git_header_html();
6127         git_print_page_nav('','', $hash,$hash,$hash);
6128         print <<EOT;
6129 <p><strong>Pattern</strong> is by default a normal string that is matched precisely (but without
6130 regard to case, except in the case of pickaxe). However, when you check the <em>re</em> checkbox,
6131 the pattern entered is recognized as the POSIX extended
6132 <a href="http://en.wikipedia.org/wiki/Regular_expression">regular expression</a> (also case
6133 insensitive).</p>
6134 <dl>
6135 <dt><b>commit</b></dt>
6136 <dd>The commit messages and authorship information will be scanned for the given pattern.</dd>
6137 EOT
6138         my $have_grep = gitweb_check_feature('grep');
6139         if ($have_grep) {
6140                 print <<EOT;
6141 <dt><b>grep</b></dt>
6142 <dd>All files in the currently selected tree (HEAD unless you are explicitly browsing
6143     a different one) are searched for the given pattern. On large trees, this search can take
6144 a while and put some strain on the server, so please use it with some consideration. Note that
6145 due to git-grep peculiarity, currently if regexp mode is turned off, the matches are
6146 case-sensitive.</dd>
6147 EOT
6148         }
6149         print <<EOT;
6150 <dt><b>author</b></dt>
6151 <dd>Name and e-mail of the change author and date of birth of the patch will be scanned for the given pattern.</dd>
6152 <dt><b>committer</b></dt>
6153 <dd>Name and e-mail of the committer and date of commit will be scanned for the given pattern.</dd>
6154 EOT
6155         my $have_pickaxe = gitweb_check_feature('pickaxe');
6156         if ($have_pickaxe) {
6157                 print <<EOT;
6158 <dt><b>pickaxe</b></dt>
6159 <dd>All commits that caused the string to appear or disappear from any file (changes that
6160 added, removed or "modified" the string) will be listed. This search can take a while and
6161 takes a lot of strain on the server, so please use it wisely. Note that since you may be
6162 interested even in changes just changing the case as well, this search is case sensitive.</dd>
6163 EOT
6164         }
6165         print "</dl>\n";
6166         git_footer_html();
6167 }
6168
6169 sub git_shortlog {
6170         my $head = git_get_head_hash($project);
6171         if (!defined $hash) {
6172                 $hash = $head;
6173         }
6174         if (!defined $page) {
6175                 $page = 0;
6176         }
6177         my $refs = git_get_references();
6178
6179         my $commit_hash = $hash;
6180         if (defined $hash_parent) {
6181                 $commit_hash = "$hash_parent..$hash";
6182         }
6183         my @commitlist = parse_commits($commit_hash, 101, (100 * $page));
6184
6185         my $paging_nav = format_paging_nav('shortlog', $hash, $head, $page, $#commitlist >= 100);
6186         my $next_link = '';
6187         if ($#commitlist >= 100) {
6188                 $next_link =
6189                         $cgi->a({-href => href(-replay=>1, page=>$page+1),
6190                                  -accesskey => "n", -title => "Alt-n"}, "next");
6191         }
6192         my $patch_max = gitweb_check_feature('patches');
6193         if ($patch_max) {
6194                 if ($patch_max < 0 || @commitlist <= $patch_max) {
6195                         $paging_nav .= " &sdot; " .
6196                                 $cgi->a({-href => href(action=>"patches", -replay=>1)},
6197                                         "patches");
6198                 }
6199         }
6200
6201         git_header_html();
6202         git_print_page_nav('shortlog','', $hash,$hash,$hash, $paging_nav);
6203         git_print_header_div('summary', $project);
6204
6205         git_shortlog_body(\@commitlist, 0, 99, $refs, $next_link);
6206
6207         git_footer_html();
6208 }
6209
6210 ## ......................................................................
6211 ## feeds (RSS, Atom; OPML)
6212
6213 sub git_feed {
6214         my $format = shift || 'atom';
6215         my $have_blame = gitweb_check_feature('blame');
6216
6217         # Atom: http://www.atomenabled.org/developers/syndication/
6218         # RSS:  http://www.notestips.com/80256B3A007F2692/1/NAMO5P9UPQ
6219         if ($format ne 'rss' && $format ne 'atom') {
6220                 die_error(400, "Unknown web feed format");
6221         }
6222
6223         # log/feed of current (HEAD) branch, log of given branch, history of file/directory
6224         my $head = $hash || 'HEAD';
6225         my @commitlist = parse_commits($head, 150, 0, $file_name);
6226
6227         my %latest_commit;
6228         my %latest_date;
6229         my $content_type = "application/$format+xml";
6230         if (defined $cgi->http('HTTP_ACCEPT') &&
6231                  $cgi->Accept('text/xml') > $cgi->Accept($content_type)) {
6232                 # browser (feed reader) prefers text/xml
6233                 $content_type = 'text/xml';
6234         }
6235         if (defined($commitlist[0])) {
6236                 %latest_commit = %{$commitlist[0]};
6237                 my $latest_epoch = $latest_commit{'committer_epoch'};
6238                 %latest_date   = parse_date($latest_epoch);
6239                 my $if_modified = $cgi->http('IF_MODIFIED_SINCE');
6240                 if (defined $if_modified) {
6241                         my $since;
6242                         if (eval { require HTTP::Date; 1; }) {
6243                                 $since = HTTP::Date::str2time($if_modified);
6244                         } elsif (eval { require Time::ParseDate; 1; }) {
6245                                 $since = Time::ParseDate::parsedate($if_modified, GMT => 1);
6246                         }
6247                         if (defined $since && $latest_epoch <= $since) {
6248                                 print $cgi->header(
6249                                         -type => $content_type,
6250                                         -charset => 'utf-8',
6251                                         -last_modified => $latest_date{'rfc2822'},
6252                                         -status => '304 Not Modified');
6253                                 return;
6254                         }
6255                 }
6256                 print $cgi->header(
6257                         -type => $content_type,
6258                         -charset => 'utf-8',
6259                         -last_modified => $latest_date{'rfc2822'});
6260         } else {
6261                 print $cgi->header(
6262                         -type => $content_type,
6263                         -charset => 'utf-8');
6264         }
6265
6266         # Optimization: skip generating the body if client asks only
6267         # for Last-Modified date.
6268         return if ($cgi->request_method() eq 'HEAD');
6269
6270         # header variables
6271         my $title = "$site_name - $project/$action";
6272         my $feed_type = 'log';
6273         if (defined $hash) {
6274                 $title .= " - '$hash'";
6275                 $feed_type = 'branch log';
6276                 if (defined $file_name) {
6277                         $title .= " :: $file_name";
6278                         $feed_type = 'history';
6279                 }
6280         } elsif (defined $file_name) {
6281                 $title .= " - $file_name";
6282                 $feed_type = 'history';
6283         }
6284         $title .= " $feed_type";
6285         my $descr = git_get_project_description($project);
6286         if (defined $descr) {
6287                 $descr = esc_html($descr);
6288         } else {
6289                 $descr = "$project " .
6290                          ($format eq 'rss' ? 'RSS' : 'Atom') .
6291                          " feed";
6292         }
6293         my $owner = git_get_project_owner($project);
6294         $owner = esc_html($owner);
6295
6296         #header
6297         my $alt_url;
6298         if (defined $file_name) {
6299                 $alt_url = href(-full=>1, action=>"history", hash=>$hash, file_name=>$file_name);
6300         } elsif (defined $hash) {
6301                 $alt_url = href(-full=>1, action=>"log", hash=>$hash);
6302         } else {
6303                 $alt_url = href(-full=>1, action=>"summary");
6304         }
6305         print qq!<?xml version="1.0" encoding="utf-8"?>\n!;
6306         if ($format eq 'rss') {
6307                 print <<XML;
6308 <rss version="2.0" xmlns:content="http://purl.org/rss/1.0/modules/content/">
6309 <channel>
6310 XML
6311                 print "<title>$title</title>\n" .
6312                       "<link>$alt_url</link>\n" .
6313                       "<description>$descr</description>\n" .
6314                       "<language>en</language>\n" .
6315                       # project owner is responsible for 'editorial' content
6316                       "<managingEditor>$owner</managingEditor>\n";
6317                 if (defined $logo || defined $favicon) {
6318                         # prefer the logo to the favicon, since RSS
6319                         # doesn't allow both
6320                         my $img = esc_url($logo || $favicon);
6321                         print "<image>\n" .
6322                               "<url>$img</url>\n" .
6323                               "<title>$title</title>\n" .
6324                               "<link>$alt_url</link>\n" .
6325                               "</image>\n";
6326                 }
6327                 if (%latest_date) {
6328                         print "<pubDate>$latest_date{'rfc2822'}</pubDate>\n";
6329                         print "<lastBuildDate>$latest_date{'rfc2822'}</lastBuildDate>\n";
6330                 }
6331                 print "<generator>gitweb v.$version/$git_version</generator>\n";
6332         } elsif ($format eq 'atom') {
6333                 print <<XML;
6334 <feed xmlns="http://www.w3.org/2005/Atom">
6335 XML
6336                 print "<title>$title</title>\n" .
6337                       "<subtitle>$descr</subtitle>\n" .
6338                       '<link rel="alternate" type="text/html" href="' .
6339                       $alt_url . '" />' . "\n" .
6340                       '<link rel="self" type="' . $content_type . '" href="' .
6341                       $cgi->self_url() . '" />' . "\n" .
6342                       "<id>" . href(-full=>1) . "</id>\n" .
6343                       # use project owner for feed author
6344                       "<author><name>$owner</name></author>\n";
6345                 if (defined $favicon) {
6346                         print "<icon>" . esc_url($favicon) . "</icon>\n";
6347                 }
6348                 if (defined $logo_url) {
6349                         # not twice as wide as tall: 72 x 27 pixels
6350                         print "<logo>" . esc_url($logo) . "</logo>\n";
6351                 }
6352                 if (! %latest_date) {
6353                         # dummy date to keep the feed valid until commits trickle in:
6354                         print "<updated>1970-01-01T00:00:00Z</updated>\n";
6355                 } else {
6356                         print "<updated>$latest_date{'iso-8601'}</updated>\n";
6357                 }
6358                 print "<generator version='$version/$git_version'>gitweb</generator>\n";
6359         }
6360
6361         # contents
6362         for (my $i = 0; $i <= $#commitlist; $i++) {
6363                 my %co = %{$commitlist[$i]};
6364                 my $commit = $co{'id'};
6365                 # we read 150, we always show 30 and the ones more recent than 48 hours
6366                 if (($i >= 20) && ((time - $co{'author_epoch'}) > 48*60*60)) {
6367                         last;
6368                 }
6369                 my %cd = parse_date($co{'author_epoch'});
6370
6371                 # get list of changed files
6372                 open my $fd, "-|", git_cmd(), "diff-tree", '-r', @diff_opts,
6373                         $co{'parent'} || "--root",
6374                         $co{'id'}, "--", (defined $file_name ? $file_name : ())
6375                         or next;
6376                 my @difftree = map { chomp; $_ } <$fd>;
6377                 close $fd
6378                         or next;
6379
6380                 # print element (entry, item)
6381                 my $co_url = href(-full=>1, action=>"commitdiff", hash=>$commit);
6382                 if ($format eq 'rss') {
6383                         print "<item>\n" .
6384                               "<title>" . esc_html($co{'title'}) . "</title>\n" .
6385                               "<author>" . esc_html($co{'author'}) . "</author>\n" .
6386                               "<pubDate>$cd{'rfc2822'}</pubDate>\n" .
6387                               "<guid isPermaLink=\"true\">$co_url</guid>\n" .
6388                               "<link>$co_url</link>\n" .
6389                               "<description>" . esc_html($co{'title'}) . "</description>\n" .
6390                               "<content:encoded>" .
6391                               "<![CDATA[\n";
6392                 } elsif ($format eq 'atom') {
6393                         print "<entry>\n" .
6394                               "<title type=\"html\">" . esc_html($co{'title'}) . "</title>\n" .
6395                               "<updated>$cd{'iso-8601'}</updated>\n" .
6396                               "<author>\n" .
6397                               "  <name>" . esc_html($co{'author_name'}) . "</name>\n";
6398                         if ($co{'author_email'}) {
6399                                 print "  <email>" . esc_html($co{'author_email'}) . "</email>\n";
6400                         }
6401                         print "</author>\n" .
6402                               # use committer for contributor
6403                               "<contributor>\n" .
6404                               "  <name>" . esc_html($co{'committer_name'}) . "</name>\n";
6405                         if ($co{'committer_email'}) {
6406                                 print "  <email>" . esc_html($co{'committer_email'}) . "</email>\n";
6407                         }
6408                         print "</contributor>\n" .
6409                               "<published>$cd{'iso-8601'}</published>\n" .
6410                               "<link rel=\"alternate\" type=\"text/html\" href=\"$co_url\" />\n" .
6411                               "<id>$co_url</id>\n" .
6412                               "<content type=\"xhtml\" xml:base=\"" . esc_url($my_url) . "\">\n" .
6413                               "<div xmlns=\"http://www.w3.org/1999/xhtml\">\n";
6414                 }
6415                 my $comment = $co{'comment'};
6416                 print "<pre>\n";
6417                 foreach my $line (@$comment) {
6418                         $line = esc_html($line);
6419                         print "$line\n";
6420                 }
6421                 print "</pre><ul>\n";
6422                 foreach my $difftree_line (@difftree) {
6423                         my %difftree = parse_difftree_raw_line($difftree_line);
6424                         next if !$difftree{'from_id'};
6425
6426                         my $file = $difftree{'file'} || $difftree{'to_file'};
6427
6428                         print "<li>" .
6429                               "[" .
6430                               $cgi->a({-href => href(-full=>1, action=>"blobdiff",
6431                                                      hash=>$difftree{'to_id'}, hash_parent=>$difftree{'from_id'},
6432                                                      hash_base=>$co{'id'}, hash_parent_base=>$co{'parent'},
6433                                                      file_name=>$file, file_parent=>$difftree{'from_file'}),
6434                                       -title => "diff"}, 'D');
6435                         if ($have_blame) {
6436                                 print $cgi->a({-href => href(-full=>1, action=>"blame",
6437                                                              file_name=>$file, hash_base=>$commit),
6438                                               -title => "blame"}, 'B');
6439                         }
6440                         # if this is not a feed of a file history
6441                         if (!defined $file_name || $file_name ne $file) {
6442                                 print $cgi->a({-href => href(-full=>1, action=>"history",
6443                                                              file_name=>$file, hash=>$commit),
6444                                               -title => "history"}, 'H');
6445                         }
6446                         $file = esc_path($file);
6447                         print "] ".
6448                               "$file</li>\n";
6449                 }
6450                 if ($format eq 'rss') {
6451                         print "</ul>]]>\n" .
6452                               "</content:encoded>\n" .
6453                               "</item>\n";
6454                 } elsif ($format eq 'atom') {
6455                         print "</ul>\n</div>\n" .
6456                               "</content>\n" .
6457                               "</entry>\n";
6458                 }
6459         }
6460
6461         # end of feed
6462         if ($format eq 'rss') {
6463                 print "</channel>\n</rss>\n";
6464         } elsif ($format eq 'atom') {
6465                 print "</feed>\n";
6466         }
6467 }
6468
6469 sub git_rss {
6470         git_feed('rss');
6471 }
6472
6473 sub git_atom {
6474         git_feed('atom');
6475 }
6476
6477 sub git_opml {
6478         my @list = git_get_projects_list();
6479
6480         print $cgi->header(
6481                 -type => 'text/xml',
6482                 -charset => 'utf-8',
6483                 -content_disposition => 'inline; filename="opml.xml"');
6484
6485         print <<XML;
6486 <?xml version="1.0" encoding="utf-8"?>
6487 <opml version="1.0">
6488 <head>
6489   <title>$site_name OPML Export</title>
6490 </head>
6491 <body>
6492 <outline text="git RSS feeds">
6493 XML
6494
6495         foreach my $pr (@list) {
6496                 my %proj = %$pr;
6497                 my $head = git_get_head_hash($proj{'path'});
6498                 if (!defined $head) {
6499                         next;
6500                 }
6501                 $git_dir = "$projectroot/$proj{'path'}";
6502                 my %co = parse_commit($head);
6503                 if (!%co) {
6504                         next;
6505                 }
6506
6507                 my $path = esc_html(chop_str($proj{'path'}, 25, 5));
6508                 my $rss  = href('project' => $proj{'path'}, 'action' => 'rss', -full => 1);
6509                 my $html = href('project' => $proj{'path'}, 'action' => 'summary', -full => 1);
6510                 print "<outline type=\"rss\" text=\"$path\" title=\"$path\" xmlUrl=\"$rss\" htmlUrl=\"$html\"/>\n";
6511         }
6512         print <<XML;
6513 </outline>
6514 </body>
6515 </opml>
6516 XML
6517 }